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Publication numberCN1969238 B
Publication typeGrant
Application numberCN 200580020342
PCT numberPCT/US2005/021757
Publication date23 May 2012
Filing date21 Jun 2005
Priority date28 Jun 2004
Also published asCA2568986A1, CA2568986C, CN1969238A, CN102629123A, CN102629123B, EP1776621A2, EP2985665A2, EP2985665A3, US7262693, US7956738, US20050289276, US20070285224, WO2006025918A2, WO2006025918A3
Publication number200580020342.9, CN 1969238 B, CN 1969238B, CN 200580020342, CN-B-1969238, CN1969238 B, CN1969238B, CN200580020342, CN200580020342.9, PCT/2005/21757, PCT/US/2005/021757, PCT/US/2005/21757, PCT/US/5/021757, PCT/US/5/21757, PCT/US2005/021757, PCT/US2005/21757, PCT/US2005021757, PCT/US200521757, PCT/US5/021757, PCT/US5/21757, PCT/US5021757, PCT/US521757
Inventors凯利·M·奥斯, 大卫·A·勃罗登, 布莱恩·L·维斯特菲尔德, 查尔斯·R·维尔克斯, 罗伯特·J·卡斯尼亚
Applicant罗斯蒙德公司
Export CitationBiBTeX, EndNote, RefMan
External Links: SIPO, Espacenet
Process field device with radio frequency communication
CN 1969238 B
Abstract
A field device (14) for use in an industrial process control or monitoring system (10) connects to a two-wire process control loop (16). The loop (16) carries data and provides power to the field device (14). RF circuitry (22) in the field device (14) is provided for radio frequency communication. A power supply (18) powers the RF circuitry (22) using power received from the two-wire process control loop (16).
Claims(51)  translated from Chinese
1. 一种现场设备,用于工业过程控制或监控系统,包括: 过程变量传感器,用于感测过程变量;I/O功率电路,与两线过程控制回路相连,并在所述两线过程控制回路中通信; 无线通信电路,与两线过程控制回路相连,并发射射频信号;以及电源电路,仅电连接到两线过程控制回路中的一条线路,并包括电压调节器,电压调节器接收压降,并提供调节过的电压输出以对无线通信电路进行供电。 A field device, for industrial process control or monitoring system, comprising: a process variable sensor for sensing a process variable; I / O power circuit, with the two-wire process control loop is connected and the two-wire process a communication control circuit; wireless communication circuit, and is connected to the two wire process control loop, and transmitting a radio frequency signal; and a power supply circuit electrically connected only to the two-wire process control loop in a line, and includes a voltage regulator, the voltage regulator receives the pressure drop, and provides a regulated voltage output to supply power to the wireless communication circuitry.
2.根据权利要求1所述的设备,包括:端子块,电连接于两线过程控制回路,所述无线通信电路与端子块连接。 2. The apparatus according to claim 1, comprising: a terminal block electrically connected to the two-wire process control loop, the wireless communication circuit connected to the terminal block.
3.根据权利要求1所述的设备,其中,无线通信电路完全由来自两线过程控制回路的电能供电。 3. The apparatus of claim 1, wherein the wireless communication circuit entirely from the two-wire process control loop of the power supply.
4.根据权利要求1所述的设备,其中,无线通信电路包括以串联方式与两线过程控制回路连接的电阻。 4. The apparatus of claim 1, wherein the wireless communication circuit comprises in series with the two wire process control resistor circuit connection.
5.根据权利要求1所述的设备,还包括为无线通信电路供电的电池。 5. The apparatus according to claim 1, further comprising a wireless communication circuit to a battery power supply.
6.根据权利要求1所述的设备,其中,无线通信电路包括两线回路通信电路,用于在两线过程控制回路中通信。 6. The apparatus of claim 1, wherein the wireless communication circuit comprises a two-wire loop communication circuit for two-wire process control loop to communicate.
7.根据权利要求ι所述的设备,其中,无线通信电路包括HART®通信电路。 7. ι Apparatus according to claim, wherein the wireless communication circuit includes a HART® communication circuit.
8.根据权利要求4所述的设备,其中,电源电路包括以串联方式与两线过程控制回路连接的二极管,所述设备还包括固有性安全保护电路,所述固有性安全保护电路包括与所述二极管跨接的另一二极管,以及分别连接到所述电阻相对的两端的隔离电阻器。 8. The apparatus according to claim 4, wherein the power supply circuit comprises in series with the two wire process control loop connected diodes, said device further comprising security inherent protection circuit, the inherent security of the protection circuit comprises said diode is connected across the other diode, and a resistor respectively connected to the opposite ends of the spacer resistor.
9.根据权利要求1所述的设备,其中,无线通信电路包括模拟到数字转换器,用于提供流过两线过程控制回路的电流的数字呈现。 9. The apparatus of claim 1, wherein the wireless communication circuit comprises an analog to digital converter for providing a flow of current through the two-wire process control loop digital presentation.
10.根据权利要求8所述的设备,其中,所述射频信号是基于感测到的电流。 10. The apparatus according to claim 8, wherein said radio frequency signal is based on the sensed current.
11.根据权利要求1所述的设备,其中,无线通信电路包括微处理器。 11. The apparatus according to claim 1, wherein the wireless communication circuitry includes a microprocessor.
12.根据权利要求11所述的设备,其中,微处理器包括存储器,存储器中存有地址信肩、ο 12. The apparatus according to claim 11, wherein the microprocessor includes a memory, stored in the memory address signal shoulder, ο
13.根据权利要求1所述的设备,其中,无线通信电路包括天线。 13. The apparatus according to claim 1, wherein the wireless communication circuit includes an antenna.
14.根据权利要求1所述的设备,其中,无线通信电路接收射频信号并在两线过程控制回路中发送信号。 14. The apparatus according to claim 1, wherein the wireless communication circuit receives the RF signal and the two-wire process control loop in a transmission signal.
15.根据权利要求1所述的设备,其中,电源电路包括齐纳二极管,以串联方式与两线过程控制回路连接。 15. The apparatus according to claim 1, wherein the power supply circuit comprises a Zener diode, in series with the two wire process control loop connection.
16.根据权利要求11所述的设备,其中,微处理器在空闲阶段进入睡眠模式。 16. The apparatus according to claim 11, wherein, in the idle phase the microprocessor into sleep mode.
17.根据权利要求1所述的设备,还包括:储能电容器,用于使用接收自两线过程控制回路的电能来存储电荷; 电源电路使用来自存储于储能电容器中的电荷的电能。 17. The apparatus according to claim 1, further comprising: a storage capacitor for use received from the two-wire process control loop to store charge power; a power supply circuit used in the storage capacitor from the stored charge of electrical energy.
18.根据权利要求1所述的设备,其中,无线通信电路被承载于模块化电路板上,所述模块化电路板被安装在现场设备的外壳中。 18. The apparatus according to claim 1, wherein the wireless communication circuitry is carried in modular circuit board, the circuit board is mounted in the modular housing of the field device.
19.根据权利要求1所述的设备,其中,无线通信电路包括以串联方式连接于两线过程控制回路的端子。 19. The apparatus according to claim 1, wherein the wireless communication circuit comprises connected in series to the two-wire process control loop terminal.
20.根据权利要求1所述的设备,还包括:包围无线通信电路的防爆外壳;所述外壳具有一体的射频透明区域,用于允许射频传输从中穿过。 20. The apparatus according to claim 1, further comprising: wireless communication circuitry surrounding the explosion-proof housing; said housing having a transparent region one radio frequency, allowing for RF transmission therethrough.
21.根据权利要求20所述的设备,其中,射频透明区域包括玻璃。 21. The apparatus according to claim 20, wherein, the RF transparent region comprises glass.
22.根据权利要求20所述的设备,包括端盖,安装到主体外壳,其中,所述端盖包括射频透明区域。 22. The apparatus according to claim 20, comprising the end cap, mounted to the main body casing, wherein the cap includes a radio frequency transparent region.
23.根据权利要求1所述的设备,包括:电路板,被配置为承载无线通信电路;射频天线,与无线通信电路相耦合并承载在无线通信电路板上。 23. The apparatus according to claim 1, comprising: a circuit board is configured to carry a wireless communication circuit; RF antenna, and a wireless communication circuit coupled to and carried on the wireless communication circuit board.
24.根据权利要求19所述的设备,其中,无线通信电路与承载端子的端子块形成一个整体。 24. The apparatus of claim 19, wherein, the wireless communication terminal of the circuit and the terminal block bearing formed integrally.
25.根据权利要求1所述的设备,其中,无线通信电路发送与两线过程控制回路中承载的模拟电流电平有关的射频信号。 25. The apparatus of claim 1, wherein the wireless communication circuit transmits two-wire process control loop carrying current level related analog RF signal.
26.根据权利要求1所述的设备,其中,射频通信电路发送与两线过程控制回路承载的数字信号有关的射频信号。 26. The apparatus of claim 1, wherein, the RF communication circuit transmits two-wire process control loop carries digital signals relating to radio frequency signals.
27.根据权利要求1所述的设备,包括:与无线通信电路相耦合的hart®模块,所述无线通信电路被配置作为到射频通路单元的双向HART®.而运行。 27. The apparatus according to claim 1, comprising: wireless communication circuitry coupled hart® module, the wireless communication circuit is configured as a bidirectional radio path unit and HART® operation.
28.根据权利要求1所述的设备,其中,无线通信电路被配置用于周期性通信。 28. The apparatus according to claim 1, wherein the wireless communication circuitry is configured for periodic communication.
29.根据权利要求1所述的设备,其中,无线通信电路被配置为发送与过程变量有关的射频信号。 29. The apparatus according to claim 1, wherein the wireless communication circuitry is configured to transmit the radio frequency signal related to the process variable.
30.根据权利要求1所述的设备,其中,电压调节器包括线性调节器。 30. The apparatus according to claim 1, wherein the voltage regulator comprises a linear regulator.
31.根据权利要求1所述的设备,其中,电压调节器包括开关模式调节器。 31. The apparatus according to claim 1, wherein the voltage regulator comprises a switch mode regulator.
32. —种现场设备中的通信方法,用于工业过程控制或监控系统,包括:将I/O电路连接到两线过程控制回路,以在两线过程控制回路上进行通信;将无线通信电路连接到两线过程控制回路,以发送射频信号;将电源电路仅电连接到两线过程控制回路中的一条线路,电源电路包括电压调节器, 电压调节器接收压降,并提供调节过的电压输出以对无线通信电路进行供电;以及发送射频信号,所述射频信号包含与承载于两线过程控制回路中的数据有关的信息。 32. - kind of field device communication method for industrial process control and monitoring systems, including: the I / O circuit connected to the two wire process control loop for the two-wire process control loop communication; wireless communication circuit connected to the two-wire process control loop, to transmit a radio frequency signal; a power supply circuit electrically connected only to the two-wire process control loop in a line, the power supply circuit includes a voltage regulator, the voltage regulator receives the voltage drop, and provide regulated voltage output to supply power to the wireless communication circuit; and transmitting RF signals, the radio frequency signal containing the carrier in two-wire process control information related to data loop.
33.根据权利要求32所述的方法,还包括:将第一和第二电连接以串联方式连接于两线过程控制回路和现场设备;将第三电连接连接于现场设备;允许来自两线过程控制回路的电流从第一电连接,通过第二电连接,并通过第三电连接去往现场设备。 33. The method according to claim 32, further comprising: first and second electrical connectors are connected in series to the two-wire process control loop and field equipment; the third electrical connection to field devices; allow from two lines process control current loop connection from the first electrical connection through the second power, and go to the field devices connected through a third electricity.
34.根据权利要求32所述的方法,其中,发送射频信号的步骤包括:按照HART®协议, 发送作为从两线过程控制回路接收到的信息的函数的射频数据。 34. The method according to claim 32, wherein the step of transmitting radio frequency signal comprises: according to the HART® protocol, sent as the two-wire process control loop RF data as a function of the received information.
35.根据权利要求32所述的方法,其中,发送射频信号的步骤包括数字通信。 35. The method according to claim 32, wherein the step of transmitting radio frequency signals comprises a digital communications.
36.根据权利要求32所述的方法,其中,发送射频信号的步骤包括模拟通信。 36. The method according to claim 32, wherein the step of transmitting radio frequency signals including analog communications.
37.根据权利要求32所述的方法,包括:接收包含引入的数据的射频信号,并在两线过程控制回路中发送所述引入的数据。 37. The method according to claim 32, comprising: receiving data comprising the introduction of radio frequency signals, and the two-wire process control loop to send the incoming data.
38.根据权利要求33所述的方法,其中,第一和第三电连接被耦合在一起。 38. The method of claim 33, wherein the first and third electrical connector are coupled together.
39.根据权利要求33所述的方法,包括:使用耦合于第一和第二电连接之间的电压调节器为无线通信电路供电。 39. The method according to claim 33, comprising: using electrically coupled to the first and second voltage regulator is connected between the power supply circuit for the wireless communication.
40.根据权利要求32所述的方法,包括:将无线通信电路耦合于已经存在的现场设备。 40. The method according to claim 32, comprising: wireless communication circuitry coupled to existing field devices.
41.根据权利要求32所述的方法,其中,射频信号承载与两线过程控制回路中承载的模拟电流电平有关的信息。 41. The method of claim 32, wherein the RF signal carrying the two-wire process control information related to the current level circuit simulation carried.
42.根据权利要求32所述的方法,其中,射频信号承载与两线过程控制回路中承载的数字信号有关的信息。 42. The method of claim 32, wherein the RF signal carrying the two-wire process control information related to a digital signal circuit bearer.
43.根据权利要求32所述的方法,包括,完全由来自两线过程控制回路的电能对无线通信电路进行供电。 43. The method according to claim 32, comprising, entirely by the energy from the two wire process control loop to supply power to the wireless communication circuitry.
44.根据权利要求32所述的方法,包括:将地址信息存储于存储器中。 44. The method according to claim 32, comprising: the address information is stored in memory.
45.根据权利要求32所述的方法,包括:在空闲阶段将无线通信电路设成睡眠模式。 45. The method according to claim 32, comprising: at idle phase is set to the wireless communications circuitry sleep mode.
46.根据权利要求32所述的方法,包括:提供到射频通路的双向HART®。 46. The method according to claim 32, comprising: providing bidirectional HART® radio path.
47.根据权利要求32所述的方法,包括:发送与过程变量有关的射频信号。 47. The method according to claim 32, comprising: transmitting the radio frequency signal related to the process variable.
48.根据权利要求32所述的方法,其中,射频信号包括纠错信息。 48. The method according to claim 32, wherein the RF signal includes error correction information.
49.根据权利要求32所述的方法,其中,射频信号是基于以下拓扑中的一种:点对点、 轮辐和中心、和网孔拓扑。 49. The method of claim 32, wherein the RF signal is based on one of the following topologies: point to point, spokes and hub, and mesh topologies.
50.根据权利要求32所述的方法,包括:提供一个旁路单元,用于将电流从两线过程控制回路进行分路。 50. The method according to claim 32, comprising: providing a bypass unit for the current from the two-wire process control loop branching.
51.根据权利要求32所述的方法,包括:用开关模式电压调节器对电源进行调节。 51. The method according to claim 32, comprising: a switch-mode voltage regulator for power adjustment.
Description  translated from Chinese

能进行射频通信的过程现场设备 The process can be performed on-site radio communications equipment

技术领域 Technical Field

[0001] 本发明涉及工业过程控制或监控系统。 [0001] The present invention relates to industrial process control or monitoring system. 更具体地,本发明涉及工业过程控制或监控系统中能够进行射频(RF)通信的现场设备。 More particularly, the present invention relates to industrial process control or monitoring system capable field devices radio frequency (RF) communication.

背景技术 Background

[0002] 在工业环境下,控制系统用于监控和控制工业和化学过程的存货等。 [0002] In the industrial environment, the control system for monitoring and control of industrial and chemical processes, inventory and so on. 典型地,控制系统使用分布在工业过程中关键位置上的现场设备来执行这些功能,这些现场设备通过过程控制回路连接到控制室中的控制电路。 Typically, the use of distributed control systems in the industrial process field device key position to perform these functions, these field devices via a process control loop is connected to the control room in the control circuit. 术语“现场设备”是指在分布式控制或过程监控系统中执行功能的任何设备,包括用于工业过程的测量、控制和监控的当前已知的或未知的所有设备。 The term "field device" means any device in a distributed control or process monitoring system to perform functions, including measuring for industrial process control and monitoring of all devices currently known or unknown.

[0003] 一些现场设备包括换能器。 [0003] Some field devices include a transducer. 换能器意指基于物理输入产生输出信号或基于输入信号产生物理输出的设备。 Transducer means generates an output signal based on a physical input or generate a physical output device based on the input signal. 典型地,换能器将输入转换为具有不同形式的输出。 Typically, the transducer input is converted to an output having a different form. 各类换能器包括多种分析装备、压力传感器、热敏电阻器、热电偶、应变仪、流量变送器、定位器、激励器、螺线管、指示灯等。 Various types of transducers include various analytical equipment, pressure sensors, thermistors, thermocouples, strain gauges, flow transmitters, positioners, actuators, solenoids, indicator lights and so on.

[0004] 典型地,每一个现场设备还包括通信电路,用于通过过程控制回路与过程控制室或其它电路进行通信。 [0004] Typically, each field device also includes communication circuitry for communication over a process control loop and the process control room, or other circuitry. 在一些装置中,过程控制回路还用于向现场设备输送调节后的电流和/或电压,从而向现场设备供电。 In some installations, the process control loop is also used to transport equipment to the scene after the adjustment of current and / or voltage to supply power to the field devices. 过程控制回路还以模拟或数字的形式携带数据。 Process control loop also in analog or digital form to carry data.

[0005] 传统地,通过两线过程控制电流回路将模拟现场设备与控制室相连,通过单一的两线控制回路将每一个设备与控制室相连。 [0005] Conventionally, via a two-wire process control current loop analog field devices connected to the control room, connect each device to the control room by a single two-wire control loop. 典型地,两线之间存在电压差,模拟方式下电压差在12-45伏范围内,数字方式下电压差在9-50伏范围内。 Typically, the voltage difference between the two lines, the analog mode voltage difference is within the range of 12-45 volts, the digital mode voltage difference is within the range of 9-50 volts. 通过将穿过电流回路中的电流调制为与所感知的过程变量成比例的电流,一些模拟现场设备向控制室发送信号。 By passing through the current loop to a current modulation and the process variable sensed current proportional Some analog field devices transmit a signal to the control room. 通过控制室对穿过回路的电流的幅度进行控制,其它模拟现场设备在控制室的控制下执行动作。 Through the control room through the magnitude of the current loop control, analog field devices to perform other actions under the control of the control room. 另外或可选择地,过程控制回路能够携带用于和现场设备进行通信的数字信号。 Additionally or alternatively, the process control loop can carry digital field devices for signal communication.

[0006] 在一些装置中,无线技术已经开始用于和现场设备进行通信。 [0006] In some installations, wireless technologies have begun to be used to communicate with field devices. 例如,完全无线的装置得以使用,其中的现场设备使用电池、太阳能电池或其它技术来获得能量而不需要任何类别的有线连接。 For example, completely wireless devices can be used in which the field device uses a battery, solar cell, or other technique to obtain power without any wired connection class. 然而,大多数现场设备与过程控制室是硬连线的,而且没有使用无线通信技术。 However, most field devices and process control room is hardwired, but do not use wireless communication technologies.

发明内容 DISCLOSURE

[0007] 一种现场设备,用于工业过程控制或监控系统,包括被配置为与两线过程控制回路相连的端子,所述两线过程控制回路被配置为携带数据并提供能量。 [0007] A field device for use in industrial process control or monitoring system is configured to include a two-wire process control loop coupled to the terminals, the two-wire process control loop configured to carry data and to provide energy. 将现场设备中的RF 电路配置用于射频通信。 The field device configured for RF communications RF circuit. 在一个实施例中,电源电路使用完全从两线过程控制回路接收到的能量来为RF电路供电。 In one embodiment, the power control loop circuit with full energy received from the two-wire process to the RF circuitry. 还提供了一种方法。 Also provided is a method.

附图说明 Brief Description

[0008] 图1是包括现场设备的过程控制监控系统的简化框图,将所述现场设备配置用于无线通信; [0008] FIG. 1 is a simplified block diagram of a process control device comprises a field monitoring system, the field device configured for wireless communication;

[0009] 图2是过程控制器监控系统的框图,其中多个现场设备向远程仪表发送信息; [0009] FIG. 2 is a block diagram of a process controller monitoring system, wherein the plurality of field devices transmit information to a remote meter;

[0010] 图3是包括无线通信电路的现场设备的分解图,所述无线通信电路用于和例如手持单元的远程设备进行通信; [0010] FIG. 3 is an exploded view of a wireless communication circuit comprising the field devices, and the wireless communications circuitry for a handheld device such as the remote communication unit;

[0011] 图4是包括现场设备的过程控制器监控系统的图,所述现场设备用于无线通信, 所述现场设备从过程控制回路获取能量; [0011] FIG. 4 is a field device includes a process controller monitoring system diagram of the field device for wireless communication, the field device from the process control loop to obtain energy;

[0012] 图5是图4所示电路的更加详细的示意图; [0012] FIG. 5 is a more detailed schematic diagram of the circuit shown in Figure 4;

[0013] 图6是在图5所示的电容器上测量得到的电压相对于时间的图表; [0013] FIG. 6 is a graph of time on the capacitor shown in Fig. 5 with respect to the measured voltage;

[0014] 图7是用于提供过程控制器监控系统中的无线通信的电路的电气框图。 [0014] FIG. 7 is an electrical block diagram of a monitoring system to provide a process controller circuits for wireless communication.

具体实施方式 DETAILED DESCRIPTION

[0015] 本发明提供了一种被配置为与过程控制回路相连的现场设备,所述现场设备还包括无线通信模块,用于进行单向或双向无线通信。 [0015] The present invention provides a method configured to process control loop coupled to the field device, the field device further includes a wireless communication module for one-way or two-way radio communication. 所述无线通信模块能够从远程设备或位置发送和/或接收RF信号。 The wireless communication module capable of transmitting and / or receiving RF signals from the remote device or location. 能够使用从两线过程控制回路接收到的能量直接为无线通信模块供电,或使用从过程控制回路接收到的并且为随后使用所存储的能量来为无线通信模块供电。 It can be used for the wireless communication module receives power from the energy to the two-wire process control loop directly, or received from the process control loop and to supply the energy stored for subsequent use as a wireless communication module. 无线通信模块可以是可移去的模块,仅需要与那些期望能够进行无线通信的现场设备相连。 The wireless communication module may be a removable module, only those desired can be connected to the field device for wireless communication.

[0016] 图1是过程控制或监控系统10的简化框图,其中控制室或控制系统12通过两线过程控制回路16与现场设备14相连。 [0016] FIG. 1 is a simplified block diagram of a process control or monitoring system 10, wherein the control room or control system 12 14 connected through two-wire process control loop 16 and field devices. 现场设备14包括I/O功率电路18、激励器/换能器20和无线通信电路22。 Field device 14 includes I / O power circuit 18, the actuator / transducer 20 and wireless communication circuitry 22. 将无线通信电路22配置为使用天线26发送和/或接收RF信号24。 The wireless communication circuitry 22 is configured to use the antenna 26 to transmit and / or receive RF signals 24.

[0017] 当前,工业仪器通常包括本地显示器或“仪表”,用于过程信息的本地监控。 [0017] Currently, the industrial equipment typically includes a local display or "instrument" for local monitoring of process information. 所述仪表在许多装置中非常有用,然而这种本地显示器配置具有几个限制。 The instrument is very useful in many installations, but this local display configuration has several limitations. 本地显示器需要依靠对现场设备的直接的视频访问。 Local monitors need to rely on direct video access to the field devices. 此外典型地,操作员每次只能看到单一的仪表。 Also typically, the operator can only see a single instrument. 包含所述仪表的仪器不经常位于便利的位置或观看角度上。 The instrument contains the meter is not always in a convenient location or viewing angle. 一种用于定位这种配置的技术是使用与过程发射机以有线方式相连的仪表。 A technique for locating such a configuration is the instrument used in the process of the transmitter is connected to a wired manner. 这种技术允许将仪表安装在更为便利的位置上。 This technique allows the meter installed in more convenient locations. 2002 年4 月22 日申请的、标题为“raOCESSTRANSMITTER WITH WIRELESS COMMUNICATION LINK” 的美国专利申请序列号No. 10/128,769中示出并描述了另一种技术。 U.S. Patent Application Serial No. No. 2002 年 4 月 22 filed, entitled "raOCESSTRANSMITTER WITH WIRELESS COMMUNICATION LINK" 10 / 128,769 is shown and described another technique.

[0018] 根据本发明,现场设备包括RF通信模块,能够用于与例如回路16的过程控制回路的连接之外的操作。 [0018] According to the present invention, a field device includes an RF communication module can be used with, for example process control loop circuit 16 operatively connected outside. 可以将无线通信模块22配置为小型的和低功耗的,从而可以将其容易地包括在已有现场设备配置中。 The wireless communication module 22 is configured as a compact and low power consumption, which can be easily included in the existing field device configuration. 所述模块能够用于对监控控制和/或数据显示所使用的信息进行无线传输。 The module can be used to monitor the control and / or data information display used for wireless transmission. 这种无线电发射机能够使现场设备信息在本地可用。 This radio transmitter allows field device information available locally. 例如,能够设置例如显示器32的单一本地显示器,并将其用于显示来自现场设备14的信息。 For example, can be set such as a single local display monitor 32, and for displaying information from 14 field devices. 可以将显示器32配置为同时地、按顺序地或通过提供给显示器的命令(例如使用操作员可用按钮的手动输入)来显示来自若干设备的信息。 The display 32 may be configured to simultaneously, sequentially, or by providing commands to the display (e.g., using the operator can manually enter button) to display information from several devices. 显示器32可以放置在固定的位置,或可以是便携式设备,从而能够被便携于整个过程控制系统以监控和观察多个现场设备的操作。 Display 32 may be placed in a fixed position, or may be a portable device, which can be portable to the entire process control system to monitor and observe the operation of the plurality of field devices. 取决于RF信号24的强度与发送和接收电路的灵敏度,能够按照期望来控制RF传输所覆盖的区域。 Depending on the RF signal strength and sensitivity transmitting and receiving circuit 24 can be controlled as desired RF transmission coverage. 例如,图2是过程控制系统50的简图,其中多个现场设备14通过单独的过程控制回路16与控制室12相连。 For example, FIG. 2 is a diagram of process control system 50, wherein the plurality of field devices 14 and 12 connected to the control chamber 16 through a separate loop process control. 每一个现场设备14都发送由显示器32接收的RF信号24。 Each field device 14 are transmitted and received by the monitor 32 RF signal 24. 在这个示例中,显示器32能够显示4个过程变量(PV1、PV2、PV3和PV4),这4个过程变量是显示器32使用天线52从现场设备14接收到的。 In this example, the display 32 is capable of displaying four process variables (PV1, PV2, PV3 and PV4), these four process variables display 32 using the antenna 52 is received from the field devices 14 to. 如上所述,显示器32可以是固定的显示器或可以是便携式显示器,例如手持单元。 As described above, the display monitor 32 may be fixed or may be a portable display, such as a handheld unit. 在这个具体配置中,所示出的显示器32显示了与过程压力有关的两个过程变量和与过程温度有关的两个过程变量。 In this particular configuration, the display illustrated 32 shows two process variables associated with the process pressure and the process temperature of two process variables. 这允许现场设备14在期望的范围内(例如在本地)通过RF连接来提供信息。 This allows the field devices 14 within a desired range (e.g., locally) to provide information over the RF connection. 例如,如果显示器32在现场设备14的40米之内,那么显示器32将能够从该现场设备接收显示信息。 For example, if the display device 32 in a field of 40 m 14, then the display 32 will be able to display information received from the field devices. 可选择的用户输入48能够用于例如选择显示器的格式、所显示的过程变量或用于询问现场设备14。 Optional user input 48 can be, for example, to select the format of the display, the displayed process variables, or for interrogating field device 14.

[0019] 图3是作为现场设备的一个示例的压力发射机60的简化的部分分解图。 [0019] Figure 3 is an example of the field as a pressure device partially exploded view of a simplified transmitter 60. 压力发射机60与两线过程控制回路16相连并包括发射机外壳62。 Pressure transmitter 60 and the two-wire process control loop 16 is connected to housing 62 and includes a transmitter. 过程控制回路16与端子板58 上所携带的端子56相连。 Process control loop 16 and the terminal block 58 carried by the terminal 56 is connected. 压力传感器64提供了换能器的一个示例,并被配置为与适于测量过程流量中发生的压力差的过程相连。 Pressure sensor 64 provides an example of the transducer, and configured to process the pressure difference occurring in the flow and is connected to suitable measurement process. 将传感器64的输出提供给与现场设备电路68相连的测量电路66。 The output of the sensor 64 is supplied to field device circuit 68 connected to the measuring circuit 66. 现场设备电路68实现了图1中所示的I/O电源18的方面。 Field device circuit 68 implements I shown in FIG aspect / O power supply 18. 无线通信电路22与现场设备电路68相连,并且在一些实施例中可以与过程控制回路16相连。 The wireless communication circuit 22 is connected to the field device circuitry 68, and, in some embodiments, the process control loop 16 can be connected.

[0020] 外壳62包括能够被旋进外壳62的端盖70和72。 [0020] The housing 62 includes a housing 62 which can be screwed into the end caps 70 and 72. 端盖72包括RF透明窗74,被配置为通常与无线通信电路22上携带的天线26对齐。 The end cap 72 includes an RF transparent window 74 configured generally with a wireless communication circuit 22 carries an antenna 26 aligned. 当附着在外壳上时,端盖为发射机60内部的电路提供了固有的安全罩。 When attached to the housing cover 60 inside the transmitter circuit provides inherent security cover. 典型地,用于端盖中的材料(例如金属)对RF信号是不透明的。 Typically, for the cover of the material (such as metal) of the RF signal is opaque. 然而,RF透明窗74允许天线26发送或接收RF信号。 However, RF transparent window 74 allows the antenna 26 to send or receive RF signals. 一个用于窗74的示例RF 透明材料是玻璃等。 RF transparent material, for example a window 74 is glass. 然而,可以使用任意适合的材料。 However, any suitable material may be used. 窗和外壳配置有助于满足固有的安全需求并提供耐火(防爆)能力。 Window and housing configuration helps to meet intrinsic safety requirements and provide fire-resistant (proof) capability. 此外,可以将外壳62中的空洞配置为提供天线26所产生的RF信号的期望辐射图案。 In addition, the housing cavity 62 can be configured to provide a desired radiation pattern produced by the antenna 26 RF signals. 例如,可能期望一些实施方式中的RF传输是定向的,而在其它实施方式中是全方向的。 For example, it may be desirable in some embodiments of the RF transmission be directional, and in other embodiments is omnidirectional. 在其它实施方式中,可以加长外壳62,从而为无线通信电路22 的放置提供额外的内部空洞。 In other embodiments, the housing 62 can be lengthened, so as to provide additional wireless communication circuit is placed inside the cavity 22.

[0021] 可以按照期望来选择无线通信电路22。 [0021] can be selected as desired wireless communication circuit 22. 一个示例电路是来自Millenial Net公司的“I-Bean”发射机设备。 An example of the circuit is "I-Bean" transmitter device from Millenial Net companies. 然而,可以使用其它电路。 However, other circuits may be used. 可以使用无线通信电路22来读取并发送过程控制回路16上携带的模拟或数字信号,而不必中断过程控制回路16或现场设备电路68的操作。 You can use the wireless communication circuit 22 to read and transmit process control loop 16 carrying the analog or digital signals, without interrupting the process control loop 16 or field device circuit 68 operation. 用于进行无线传输的电路应该是足够小的并且具有足够低的功耗,从而符合过程现场设备的物理和功率约束范围。 Circuitry for wireless transmission should be sufficiently small and have a sufficiently low power consumption to meet the physical and power constraints of process field device range. 可以将一些现有技术领域中的发射机配置为接收可选择的显示,这些显示通常会设置在图3中无线通信电路22的位置。 Some prior art transmitters can be configured to receive an optional display, the display is usually disposed in the position shown in the wireless communication circuit 22 3. 在这种配置中,可以使用无线通信电路22来代替本地显示器。 In this configuration, you can use the wireless communication circuit 22 in place of the local display. 在这种配置中,无线通信电路22仅发送与过程控制回路16直接相连的RF信号和对应于回路16上携带的任意模拟和/或数字信号的RF信号。 In this configuration, the wireless communication circuit 22 transmits only the process control loop 16 and is directly connected to the RF signal corresponding to the upper loop 16 carrying any analog and / or digital signal RF signal.

[0022] 通常,这里讨论的过程控制回路能够包括用于工业过程控制和监控系统的任意类型的过程控制回路。 [0022] Typically, the process control loop discussed herein can include for any type of industrial process control and monitoring systems, process control loop. 这些回路包括4-20mA电流回路,其中模拟电流的电平在4和20mA之间变化以传输信息。 These circuits include 4-20mA current loop, in which the analog current level change in order to transfer information between 4 and 20mA. 可以使用相同的控制回路向现场设备供电。 You can use the same control circuit power supply to the field devices. 另一种过程控制回路与HART ®通信协议一致,其中在4-20mA信号上叠加数字传输以传输附加信息。 Another process control loop consistent with HART ® communication protocol, which is superimposed on the 4-20mA signal transmission to digital transmission of additional information. 另一个示例 Another example

两线过程控制回路使用美国仪表协会(ISA)提出的、被称作现场总线SP50协议的协议。 Two-wire process control loop using the Instrument Society of America (ISA) proposed protocol is called SP50 fieldbus protocol. 然而,可以使用端信令协议。 However, you can use the end of the signaling protocol. 可以将一些过程控制回路配置为与多个现场设备相连,从而现场设备能够彼此通信或监控来自另一个现场设备的传输。 Some process control loop may be configured to connect multiple field devices to communicate with each other or a field device to monitor transmissions from another field device. 通常,可以使用本发明中的无线通信技术来传输任意类型的信息,所述信息是在这些过程控制回路上传输、在现场设备中可用或由现场设备内部产生或由现场设备接收、或用于控制现场设备的信息以及其它类型的信息。 In general, the invention can be used in wireless communication technology to transmit any type of information, which is in the process control loop transmission, available in the field device or by a field generated within the device or received by the field device, or for control information, and other types of information field devices. 在另一个示例中,操作员可以将用于配置现场设备的手持单元或设备带入现场。 In another example, the operator may be used to configure the field device or handheld unit into the field devices. 当手持设备在现场设备的附近时,操作员使用手持设备向现场设备发送信息或从现场设备接收信息。 When the handheld device in the vicinity of the field device, the operator uses a handheld device to send information to and receive information from field devices or field devices. 这允许操作员收集信息或对现场设备编程,而不需要在实际上与设备或实际过程控制回路相连。 This allows the operator to collect information or on-site device programming, without the need to actually connected with the device or in the actual process control loop.

[0023] 在一些实施例中,还期望从现场设备或向现场设备进行通信以携带寻址信息。 [0023] In some embodiments, it is also desirable from the field device to the field devices to communicate or to carry addressing information. 寻址信息能够指示传输的来源或传输的目的接收方。 Addressing information indicating the intended recipient can transfer source or transfer. 无线通信电路能够按照期望连续地、周期地或间歇地进行传输。 The wireless communication circuit can be continuously, periodically or intermittently transmitted as desired. 在另一个示例中,无线通信电路仅当启用或“被轮询”时才进行传输。 In another example, the wireless communication circuit only when enabled or "poll" for transmission. 所述启用能够从信源内部到现场设备、通过过程控制回路接收、从无线信源接收或由另一个无线信源接收或产生。 The enabling from the source can be internal to the field device, received through the process control loop, receive, or received or generated by another source from the wireless radio source. 在多个现场设备可以同时进行传输的环境中,应该选择传输协议以避免或寻址可能干扰传输的任意类型的碰撞。 In multiple field devices can be transmitted at the same time environment, you should select the transport protocol to avoid or address may interfere with the transmission of any type of collision. 例如,可以使用不同频率或跳频技术、可以使用随机或半随机传输窗、可以实施重复的传输或基于令牌的技术或其它期望的碰撞避免技术。 For example, you can use a different frequency or frequency-hopping technology, you can use the random or semi-random transfer window, you can implement repeatable transmission or token-based technology or other desired collision avoidance techniques. 如果传输包括错误检测或校正信息,那么可以使用这个信息来检测传输中的错误和/或校正传输中的任意错误。 If the transmission includes error detection or correction information, you can use this information to detect errors in the transmission and / or correct any errors in transmission. 如果错误是不能校正的,那么接收单元能够请求再次传输出错的数据、或指示错误、或等待随后的数据传输、或采取其它期望的步骤。 If the error can not be corrected, the receiving unit can request re-transmission of the erroneous data, or to indicate an error, or wait for subsequent data transfer, or take other steps desired.

[0024] 图3还示出了示例手持设备80,用于通过RF连接82与电路22进行通信。 [0024] Figure 3 also shows an example of a handheld device 80, 82 for connection with the circuit 22 communicate through RF. 手持设备80包括显示器84和用户输入86。 Handheld device 80 includes a display 84 and a user input 86. 其它类型的输入和输出可以包括在手持设备80中。 Other types of input and output may be included in the handheld device 80. 优选地,手持设备80是电池操作的并且能够由操作员带入现场,从而与现场设备60进行通信。 Preferably, the handheld device 80 is battery operated and can be brought into the field by the operator, in order to communicate with field devices 60. 来自现场设备60或来自其它信源的信息显示在显示器84上,并使用输入86控制手持设备。 From the field device 60 or from other sources of information displayed on the display 84, and 86 using the input control handheld device. 手持设备80能够将命令或其它信息传输到现场设备60。 Handheld device 80 can transmit commands or other information to the field device 60.

[0025] 在一种配置中,无线通信电路需要现场设备中可用的功率约束范围内的功率。 [0025] In one configuration, the wireless communication circuitry requires power within the power constraints available in the range of the field device. 例如,现场设备中当前使用的一个显示器使用3. 6伏和0. 5mA。 For example, a display device currently used in the field using a 3.6 volt and 0. 5mA. 如果使用了能够操作LCD仪表的发射机,那么无线通信电路能够替代LCD仪表并使用用于驱动LCD仪表的同一个电源。 If the transmitter is capable of operating LCD meter, the wireless communication circuit can replace the LCD meter and used to drive the LCD with a power meter. 在另一个示例中,无线通信电路直接由过程控制回路供电,例如使用与过程控制回路串联的二极管上的压降。 In another example, the wireless communications circuitry powered directly from the process control loop, for example, a process control loop pressure drop of the diode in series. 在通信电路不使用电池的实施例中,电路能够更加容易地满足固有的安全或其它安全核定需求并提供不确定的现场寿命,而不需要电池更换或维护。 In the communication circuit without using the battery embodiment, the circuit can be more easily meet intrinsic safety or other safety approval requirements and provide an uncertain life scene, without the need for battery replacement or maintenance. 在无线配置仅用于发送信息的配置中,可以减小功率需求。 In the configuration of the wireless configuration is only used for transmitting information, it can reduce power requirements. 在另一个示例中,如果期望较大的传输范围,例如图1所示显示器32的固定设备可以包括RF中继器,用于对从现场设备接收到的数据或向现场设备发送的数据进行再次传输。 In another example, if desired a larger transmission range, e.g., a display shown in FIG fixation device 32 may include an RF repeater, for receiving data from the field device to the field device data to be transmitted or re- transmission. RF中继器可以由回路供电,或从其它来源获取能量。 RF repeater may consist of loop-powered, or get energy from other sources. 此外,一旦接收到RF数据,能够将其重新格式化以便在其它介质(例如以太网连接) 上传输、重新格式化为过程控制系统中使用的已有数据传输结构(在例如蜂窝电话的扩展范围的RF通信链路上)、或使用其它技术进行中继。 In addition, once the RF data is received, it can be reformatted to other media (e.g., Ethernet connection) transmission, reformat the existing data structures used in the process control system (e.g., a cellular phone in an extended range on the RF communication link), or to relay other techniques.

[0026] 图4是示出了本发明另一个方面的过程控制器或监控系统100的简图。 [0026] FIG. 4 is a schematic diagram illustrating another aspect of the present invention is a process controller or monitoring system 100. 在系统100中,现场设备14通过过程控制回路16穿过接线盒102连接到控制系统12。 In system 100, the field device 14 through process control loop 16 through junction box 102 is connected to the control system 12. 在图4中的实施例中,现场设备104与过程控制回路16相连并包括无线通信电路122。 In the embodiment of FIG. 4, the field device 104 are connected with the process control loop 16 and includes wireless communication circuitry 122. 无线通信电路122被配置为发送RF信号106,并完全由从过程控制回路16接收到的能量来供电。 The wireless communication circuit 122 is configured to transmit RF signal 106 and fully from the process control loop 16 by the received energy to the power supply.

[0027] 过程设备104包括功率调节器110、分路器或旁路112以及超级电容器114。 [0027] Process device 104 includes a power regulator 110, 112 and the bypass splitter or super capacitor 114. 在操作期间,利用从过程控制回路16抽取的过压,使用功率调节器110对超级电容器114缓慢地进行充电(涓流充电)。 During operation, the use of process control loop 16 drawn from overvoltage, use the power regulator 110 super capacitor 114 is charged slowly (trickle charging). 旁路112允许回路16正常地操作,并且与回路16串联。 Bypass 112 allows loop 16 to operate normally, and 16 in series with the loop. 通信电路122包括用于接收过程控制回路16上携带的信息的电路,所述信息是模拟和/或数字信息。 Communication circuit 122 comprises a circuit for receiving information on the process control loop 16 carrying, the information is analog and / or digital information. 电路122能够基于接收到的信息做出响应并发送RF信号106。 Circuit 122 able to respond based on the received information and transmits the RF signal 106. 如果以接收机的方式操作,那么电路122能够将数据调制为回路16中携带的电流。 If the manner of operation of the receiver, then the data modulation circuit 122 can be carried in the current loop 16. 这可以是模拟或数字信息。 This may be analog or digital information. 这种配置允许在无线通信网络上对数据进行中继。 This configuration allows the wireless communication network for data relay. 可以根据任意类型的拓扑结构,包括点对点、轮辐以及中心和网孔拓扑,来配置网络。 It can be based on any type of topology, including point to point, and the center of the spokes and the mesh topology to configure the network. 过程设备104能够位于沿着回路的任意位置上,包括被配置为例如图4所示的独立设备。 Process device 104 can be located anywhere along the circuit, including independent apparatus is configured, for example as shown in FIG. 4. 在一些装置中,现场设备104应该是在现场强化安装,配置成用于固有性安全(intrinsicsafety)的操作。 In some devices, the field devices 104 should be strengthened in the field installation, configured to operate for the inherent security (intrinsicsafety) of. 设备104还可以位于另一个现场设备14内部(作为接线盒102的一部分)或甚至位于覆盖控制系统12的控制室内。 Device 104 may also be located inside another field device 14 (as part of the junction box 102), or even within the coverage of the control system 12 control room. 现场设备104能够同时地或通过使用多路复用器或其它技术来连接到多于一个的RF电路122和/或多于一个的过程控制回路16。 Field device 104 can simultaneously or by using a multiplexer or other techniques to connect to more than one RF circuit 122 and / or more than one process control loop 16.

[0028] 使用超级电容器允许设备不需要内部电池或其它技术而操作。 [0028] The use of super capacitor allows the device does not require an internal battery, or other technical and operational. 使用电容器允许快速充电和存储足够大的电势能。 Using capacitors allows quick charging and storage large enough potential energy. 当用于危险的环境中时,为了满足固有安全标准,较大的能量存储器可能是不可接受的。 When used in hazardous environments, in order to meet intrinsic safety standards, greater energy storage may be unacceptable. 然而,过程设备104能够离开危险的环境,例如在接线盒102 处,其中不对接线盒102处的固有安全做出要求。 However, the process device 104 can leave the hazardous environment, for example in the junction box 102, where intrinsic safety junction box 102 does not make requirements.

[0029] 图5是现场设备104的简化示意图,其中更加详细地示出了超级电容器114。 [0029] FIG. 5 is a simplified schematic diagram of field device 104, which is shown in greater detail supercapacitor 114. 在这个示例中,超级电容器114包括两个10法拉电容器,每一个都被配置为携带2. 5伏电势能。 In this example, super capacitor 114 comprises two 10 Farad capacitors, each of which is configured to carry 2.5 volts potential. 这产生了具有5伏压降的5法拉电容。 It was produced with a 5 volt drop of 5 farad capacitor. 假定无线通信电路122能够在4至5伏之间的电压上操作,来自每一个5法拉电容器的可用能量是1/2*C(V/-V/),即1/2*5*(52-42) = 22. 5J。 Assumed that the wireless communication circuit 122 is capable of operating on a voltage between 4-5 volts, the available energy from each of the 5 Farad capacitors is 1/2 * C (V / -V /), i.e., 1/2 * 5 * (52 -42) = 22. 5J.

[0030] 图6是超级电容器114上测量到的电压相对于时间的图表。 [0030] FIG. 6 is a graph showing the measured voltage super capacitor 114 with respect to time. 在这个示例中,在td 为1秒的时期内发送突发信号的600mW无线发射机将需要0. 6J/S*ls = 0. 6J的能量。 In this example, the burst signal is transmitted in a one second period td 600mW wireless transmitter will require 0. 6J / S * ls = 0. 6J energy. 因此,对于这个通信电路122的操作来说,具有充足的可用能量。 Therefore, for the operation of the communication circuit 122, it has sufficient available energy.

[0031] 用于向过程控制回路供电的典型电源提供24伏的直流电。 [0031] The process control loop is used to power a typical 24-volt DC power supply. 然而,在4_20mA系统中,发射机可能仅需要12伏进行操作。 However, in 4_20mA system, a transmitter may only require 12 volts to operate. 过程控制回路中的布线损失可能导致2至4伏的压降。 Process control loop wiring may cause loss of 2-4 volts drop. 假定仅有5伏可以用于对超级电容器114进行充电,并且过程控制回路以低电流等级(4mA)操作,那么仍有20mW可以用于对超级电容器114进行充电。 Assuming only 5 volts may be used to charge the super capacitor 114, and the process control loop at a low current level (4mA) operation, then there is still 20mW 114 may be used to charge the super capacitor. 由于在传输周期中仅消耗了0. 6J,可用的20mW将以时间t。 Since the transmission cycle consumes only a 0. 6J, will be available 20mW time t. = 0. 6J/0. 02W = 30s对超级电容器充电至完全的容量。 = 0. 6J / 0. 02W = 30s super capacitor is charged to full capacity. 因此,这种配置将能够每30秒传输一次具有1秒持续时间的信号。 Therefore, this configuration would be able to transmit once every 30 seconds with one second signal duration. 假定通信信号的带宽是200Kb/s且分组的大小为200b,那么突发时间减少为1毫秒,因而传输时间为0. 03秒。 It assumed that the bandwidth of the communication signal is 200Kb / s and a packet size of 200b, the burst time is then reduced to 1 ms, so that the transmission time is 0.03 seconds. 在这种配置中,因为诊断数据不具有时间严格性,所以能够容易地传输诊断数据。 In this configuration, because the diagnostic data are not time-critical nature, it is possible to easily transmit diagnostic data. 然而,如果足够快的充电时间是可用的,那么也能够以无线的方式来传输控制和过程变量信号。 However, if fast enough charging time is available, then it is possible to transmit a wireless manner and process variable control signal.

[0032] 虽然对超级电容器进行了描述,可以使用包括电池或其它的任意储能设备。 [0032] Although the super capacitor has been described, may be used include a battery or any other storage device. 用于对储能设备进行充电的能量可以是电性或磁性的,并且可以从任意来源获取或收集。 Energy for charging the energy storage device can be electrical or magnetic and can be obtained from any source or collection.

[0033] 图7是过程控制器监控系统150的简图,包括通过两线过程控制回路156与现场设备154相连的控制室152。 [0033] FIG. 7 is a diagram of a process controller monitoring system 150, including through the two-wire process control loop 156 and 154 are connected field device control room 152. 过程控制回路156延伸穿过固有安全屏障158。 Process control loop 156 extends through the inherent safety barrier 158. 控制室152 是模型化的,包括电源160和负载电阻器162。 Control Room 152 is modeled, including power supply 160 and a load resistor 162.

[0034] 现场设备154可以具有任意配置,并且不限于图7所示的特定示意图。 [0034] The field device 154 may have any configuration and is not limited to the particular schematic shown in FIG. 所示出的RF通信电路170与回路156串联。 RF communication circuit 170 and the circuit 156 illustrated in series. 可以在现场设备的端子块中实现电路170。 Circuit 170 may be implemented in the terminal block field device. 例如,可以将电路170配置为附加模块,从而两线过程控制回路156能够连接到已有发射机电路。 For example, circuit 170 may be configured as additional modules to two-wire process control loop 156 can be connected to an existing transmitter circuit.

[0035] 在图7所示的配置中,通信电路170为新的或已有的过程控制回路或现场设备增加了无线通信能力。 [0035] In the configuration shown in Fig. 7, the communication circuit 170 to a new or existing process control loop or field device to increase the wireless communication capabilities. 将电路170配置为由过程控制回路供电,并且能够作为独立的现场设备而安装在从控制室开始的回路中的任意地方、沿着回路自身的任意地方、在固有性安全(IS,intrinsicsafety)屏障或接线盒158内或包括在另一个现场设备中。 The circuit 170 configured as a process control loop powered and can be mounted in the control room from the beginning of the loop anywhere as an independent on-site equipment, anywhere along the loop itself, inherent security (IS, intrinsicsafety) barrier or within the junction box 158 or included in another field device. 可以将电路170 配置用于任意类型的通信。 Circuit 170 may be configured for any type of communication. 然而,在一个示例配置中,将电路170配置为测量过程控制回路156中携带的电流并向无线接收机发送与测量到的电流有关的输出。 However, in one example configuration, the circuit 170 is configured to measure a process control loop 156 carries current to a wireless receiver transmits the measured current output related.

[0036] 现在回到图7中所示的电路170的一个特定实施例,检测电阻180与电源二极管182与过程控制回路156串联。 [0036] Now back to a particular circuit 170 shown in FIG. 7 embodiment, the power supply sense resistor 180 and diode 182 connected in series with process control loop 156. 检测电阻180可以是例如10欧姆,用于检测过程控制回路156中携带的电流等级I。 Sense resistor 180 may be, for example 10 ohms, for detecting the process control loop 156 carries current level I. 测试二极管184也与回路156串联,并提供测试点186。 Testing Diodes 184 and circuit 156 are connected in series, and provide 186 test points. 这可以用于对与电路170相连的现场设备进行校准或定性。 This can be used for field devices connected to the circuit 170 for calibration or characterization. 提供了固有安全保护电路190,包括: 二极管192,如图所示与二极管182跨接;隔离电阻器194,连接在检测电阻180的相对的两端。 It provides intrinsically safe protection circuit 190, comprising: a diode 192, as shown across the diode 182; isolation resistor 194 connected to opposite ends of the sense resistor 180. 二极管182是电源196的一部分,电源196包括电容器198、输入滤波器200、调节器202、电容器204和第二滤波器206。 Diode 182 is part of the power supply 196, power supply 196 includes a capacitor 198, input filter 200, regulator 202, capacitor 204 and the second filter 206. 第二滤波器206包括电容器208和电阻器210。 The second filter 206 includes a capacitor 208 and a resistor 210. 电源电路196产生相对于电路的地的电源电压Vdd,以供电路测量回路电流和以无线的方式发送结果信号而使用。 The power supply circuit 196 generates relative to circuit ground power supply voltage Vdd, the road to power measurement circuit current and wirelessly transmit the resulting signal is used. 虽然示出了特定的电源实施方式,可以按照期望使用任意适合的电源配置或实施例。 While shows specific power embodiments may use any suitable in accordance with the desired power configuration or embodiments.

[0037] 在这个实施例中,输入电路218包括检测电阻180并且被配置为测量流过回路156 的电流I。 [0037] In this embodiment, the input circuit 218 includes a detection resistor 180 and is configured to measure a current flowing through the circuit 156 I. 输入电路218还包括滤波器220,滤波器220向运放222提供了差分连接。 The input circuit 218 also includes a filter 220, a filter 220 to provide a differential amplifier 222 is connected. 运放向模拟至数字转换器226提供了放大的输入信号,图示中的模拟至数字转换器226作为微处理器224的一部分。 Operational amplifier to the analog-to-digital converter 226 provides the amplified input signal, shown in the analog-to-digital converter 226 as part of the microprocessor 224. 提供了时钟电路228,用于向例如微处理器222提供时钟信号。 Providing the clock circuit 228, e.g., for supplying a clock signal to the microprocessor 222. 可选择的HART ®发送和接收电路230与微处理器224、回路156、时钟电路228和RF发送/接 Selectable HART ® transmission and reception circuit 230 and the microprocessor 224, the loop 156, clock circuit 228 and RF transmission /

收电路232相连。 Reception circuit 232 is connected. 将可选择的HART ®电路230配置为从微处理器224接收数字片选信号 The optional HART ® circuit 230 configured as a digital chip select signal from the microprocessor 224 receives

(CSl)。 (CSl). 将RF电路232配置为从微处理器224接收单独的数字片选信号(CS2)。 The RF circuit 232 is configured to microprocessor 224 receives from a separate digital chip-select signal (CS2). 将HART ® The HART ®

电路230和RF电路232配置为在SCI总线上与微处理器224进行通信,这取决于哪一个片选有效。 Circuit 230 and RF circuit 232 configured to run on SCI bus 224 to communicate with the microprocessor, depending on which chip select is active. 还将微处理器224配置为向运放222提供关闭信号。 The microprocessor 224 also configured to provide a closing signal to the op-amp 222. 微处理器224包括存储器236,用于存储编程指令、临时和持久变量以及其它信息,并且可以同时包括易失和非易失存储器。 The microprocessor 224 includes a memory 236 for storing programming instructions, temporary and permanent variables and other information, and may include both volatile and nonvolatile memory. 例如,存储器可以包括EEPROM并且能够包含唯一地标识电路170的寻址信息。 For example, the memory may include EEPROM and can uniquely identify circuit 170 comprises addressing information. RF 电路232与天线240相连,可以按照期望将天线240配置为内部天线、外部天线或其组合。 RF circuit 232 is connected to the antenna 240, the antenna 240 can be configured as desired for the internal antenna, external antenna, or combinations thereof. 将电路170配置为与两线过程控制回路156跨接,从而回路156能够在例如过程发射机或过程控制器的另一个现场设备处终止。 The circuit 170 is configured with two-wire process control loop 156 across, so the loop 156 can terminate at another field device such as the process at the transmitter or process controller.

[0038] 可以在单一的印刷电路板上实现图7所示的电路170,从而RF天线240与电路板形成一个整体。 [0038] Circuit 170 may be implemented as shown in FIG. 7 in a single printed circuit board, so that RF antenna 240 is formed integrally with the circuit board. 这个配置允许在已有现场设备中容易地实现电路170,并且不需要使用外部天线。 This configuration allows the existing field device circuitry 170 easily implemented and does not require the use of an external antenna. 这减小了安装复杂性。 This reduces the installation complexity.

[0039] 可选择的HART ®发送/接收电路230能够用于监控过程控制回路156上携带的数字信号(例如过程变量)。 [0039] Optional HART ® transmission / reception circuit 230 can be used to monitor process control loop carries digital signals 156 (e.g., process variable). 基于检测到的数字信号,HART®电路230能够控制RF发送/ Based on the digital detected signal, HART® circuit 230 can control the RF transmit /

接收电路232的操作(即发送与检测到的过程变量有关的信息或其它信息)。 Operations (that is sent to the detected process variable information or other information related to) the reception circuit 232. 如果按照完全的HART ®协议和适合的RF协议栈来实现HART ®电路,那么电路能够实现通路级的功能,即允许HART ®主机以双向方式通过RF HART ®通路设备与过程控制回路156上的具有HART®能力的现场设备进行通信。 If you follow the complete HART ® protocol and appropriate RF protocol stack to achieve HART ® circuit, then the circuit can achieve path level functions that allow HART ® hosts bi-directional manner through RF HART ® access equipment and process control circuit 156 has HART® field devices the ability to communicate. 这允许与用于监控、配置、诊断或交换其它信息或数据的现场设备进行无线通信。 This permits and for monitoring, configuration, diagnostics or other field devices to exchange information or data wirelessly.

[0040] 在过程控制或监控装置中,为了与现场设备交换信息,经常需要操作员实际访问现场设备或过程控制回路。 [0040] In process control or monitoring device, in order to exchange information with the field device, an operator often needs to access the actual field device or the process control loop. 这允许操作员修复仪器,并且对仪器做出预防性的维护。 This allows the operator to fix the instrument, and the instrument to make preventive maintenance. 这里提出的无线通信配置允许操作员询问位于难于访问的位置的现场设备。 Wireless communication configuration presented here allows the operator asked in a hard to access location field devices. 此外,即使在易于访问的现场设备的配置中,无线通信电路不需要操作员移去例如发射机或接线盒的仪器上的封盖,以便暴露出用于和过程控制回路相连的回路布线。 Moreover, even in easily accessible configuration of field devices, the wireless communication circuit does not require an operator such as removal of the transmitter or junction box cover on the instrument, so as to expose the wiring used and the process control loop circuit connected. 这一点在可能存在爆炸性气体或蒸气的危险地方特别有益。 This dangerous place in the presence of explosive gases or vapors may be particularly useful. 如上所述,无线通信电路能够发送数字或模拟过程变量,并将其传输到无线仪表或手持设备。 As described above, the wireless communication circuit capable of transmitting digital or analog process variables and transfer it to a wireless meter or handheld device.

[0041] 在操作期间,电路170与过程控制回路156串联,利用流过回路的4_20mA电流来为自身供电。 [0041] During operation, the circuit 170 in series with process control loop 156, flowing through the current circuit 4_20mA for their own power supply. 对于使用公共电气地的现场设备来说,可以将电路170插入到回路连接的高电压侧。 For electrically common field devices, the circuit 170 can be inserted into the high-voltage side circuit connection. 这个配置允许访问现场设备内的其它总线电路,例如CAN接口。 This configuration allows access to other bus circuitry within field devices, such as CAN interface. 这个配置包括测试连接186,用于测量测试期间的回路电流。 This configuration includes a test connection 186 for current measurement circuit during testing. 优选地,根据固有安全步骤,当测量与回路156 相连的端子181时,将检测电阻180配置为提供等效电容为0。 Preferably, the step of inherent safety, when the terminal 181 is connected to the measuring circuit 156, the sense resistor 180 is configured to provide the equivalent capacitance is zero. 将电路170配置为在3至4伏之间进行额定操作,齐纳二极管182连同检测电阻180 —起对这个操作电压进行设置。 The circuit 170 is configured to be between 3-4 volts nominal operation, the Zener diode 182 along with the sense resistor 180-- from this operating voltage can be set. 典型4-20mA电流回路上的可用过压足以操作电路170。 Typical 4-20mA current loop available overpressure sufficient to operate circuit 170. 此外,可以使用功率管理技术以限制从回路提取的电流为大约3mA。 In addition, you can use power management techniques to limit the current drawn from the loop is about 3mA. 这允许与过程控制回路相连的任意现场设备发送3. 6mA 电平的报警信号,不会因为提取多于可用电流电平而使电路崩溃。 This allows the process control loop connected to any field device sends 3. 6mA level alarm signal will not extract more than the current level of available crash leaving the circuit.

[0042] 齐纳(Zener) 二极管182作为与回路156串联的分路元件,用于在输入滤波器级产生预调节电压。 [0042] Zener (Zener) diode circuit 182 as the shunt element 156 series for the input filter stage produces a voltage pre-regulator. 电路170不使用的任意部分的回路电流从齐纳二极管182分流。 Loop current in any part of the circuit 170 does not use from 182 shunt Zener diode. 输入滤波器200能够包括电容性、电感性和电阻性元件,并用于将回路与电路170产生的任意噪声或负载波动相隔离。 The input filter 200 can include a capacitive, inductive and resistive element, and for any noise or load fluctuations generated circuit and circuit 170 is isolated. 这还抑制了HART®扩展频段中的噪声,以便符合HART®标准。 It also inhibits the HART® extended band noise to comply with HART® standard.

[0043] 电压调节器202可以是任意适合的电压调节器,例如但不限于线性或开关模式调节器,用于向电路提供电压VDD。 [0043] Voltage regulator 202 may be any suitable voltage regulator, such as, but not limited to linear or switch mode regulator circuit for supplying a voltage to VDD. 滤波器206用于存储能量,并且进一步对来自调节器202的电路负载进行解耦合。 Filter 206 is used to store energy, and further the load circuit from the regulator 202 is de-coupling. 在电路负载变化时,允许第二滤波器206的输出电压下跌几百毫伏。 In the circuit load changes, allowing the second filter output voltage 206 fell a few hundred millivolts. 这允许电路172提取的峰值电流从4-20mA电流回路得以平均。 This allows the circuit 172 to extract the peak current from 4-20mA current loop to be average.

[0044] 在这个实施例中,为了减少功耗,在空闲操作时期中可以将包括A/D转换器的微处理器224以及RF电流232和输入电流218置于睡眠模式或低功率模式。 [0044] In this embodiment, in order to reduce power consumption during idle operation period can include A / D converter 224, and RF current microprocessor 232 and the input current 218 in the sleep mode or low power mode. 例如,微处理器中的内部定时器能够以选择的间隔(例如10秒)启用A/D转换器对回路电流进行测量。 For example, the internal timer in the microprocessor can be selected intervals (e.g., 10 seconds) to enable A / D converter for measuring current loop. 允许在A/D转换发生之前对测量电路进行调整。 Before allowing A / D conversion occurs on the measurement circuit is adjusted. 在完成A/D转换后,关闭回路测量电路和A/ D转换器以保存功率。 After the completion of A / D conversion, closed loop measurement circuit and A / D converter to conserve power. 微处理器将测量后的数值传递到RF电路232以进行传输。 The values measured after the microprocessor is transmitted to RF circuitry 232 for transmission. 在传输完成后,微处理器和RF电路返回低功率模式,直到下一个周期。 After the transfer is complete, the microprocessor and RF circuitry return to low-power mode until the next cycle. 微处理器甚至可以使自身处于暂时睡眠以节省功率。 The microprocessor can even make their own in a temporary sleep to conserve power. 使用这些功率管理技术,微处理器能够通过对调节器级上的负载需求进行摆动以管理电路的所有电流需求。 Use these power management technology, the microprocessor can load demand by regulator stage swinging on all current requirements to manage the circuit.

[0045] 使用与4_20mA电流回路串联以测量模拟电流电平的10欧姆检测电阻器180来实现回路电流测量。 [0045] using 4_20mA series to measure the current loop analog current level of 10 ohm resistor 180. detecting circuit current measurements. 对检测电阻器180上形成的电压进行滤波,从而移去由于HART®数字通信所引起的波动以及任何回路噪声。 Formed on the voltage sensing resistor 180 is filtered, and thus removed due to fluctuations caused by HART® digital communication, and any circuit noise. 可操作的放大器级222还提供信号调节,并将信号传送到微处理器224中的A/D转换器226。 Operational amplifier stage 222 provides further signal conditioning, and signal to the microprocessor 224. The A / D converter 226.

[0046] RF电路232可以是按照期望的任意适合的电路或配置。 [0046] RF circuitry 232 may be in accordance with the desired circuit, or any suitable configuration. 在一种简单的形式中,RF 电路232仅向无线接收机发送测量后的变量。 In a simple form, RF circuit 232 sends the variables measured only after the radio receiver. 可以使用天线240来播送RF信号,并且能够将天线240与电路170形成一个整体,例如以围绕电路板外沿而布线的走线的形式。 You can use the antenna 240 to broadcast RF signals, and the antenna 240 can be formed integrally with the circuit 170, for example in the form of a circuit board to surround the outer edge and wiring traces. 在一些实施例中,RF电路232可以包括无线接收机,从而可以将电路232配置为收发机。 In some embodiments, RF circuit 232 may include a wireless receiver, so that circuit 232 can be configured as a transceiver. 如果期望,能够使用同一个天线240同时用于发送和接收。 If desired, it is possible to use a single antenna 240 for both transmission and reception. 典型的低功率收发机可能具有200英尺的通信射程,然而,可以使用不同的功率需求、电路灵敏度、天线配置等来实现其它射程。 Typical low power transceiver may have a communication range of 200 feet, however, may use different power requirements, circuit sensitivity, antenna configuration to achieve the other range. 如果将电路170安装在金属外壳(例如发射机的现场外壳隔间)中,那么应该使用外壳的RF透明部分以允许从天线240发送和接收信号。 If the circuit 170 is mounted in a metal housing (transmitter field housing compartment for example), then you should use RF transparent portion of the housing to allow the transmission and reception of signals from the antenna 240. 例如上文所述,可以使用玻璃窗。 For example above, you can use the windows. 其它示例材料包括足以传送RF信号的任意材料,包括塑料或其它材料。 Other examples of materials include any material sufficient to transmit RF signals, including plastic or other materials.

[0047] 额外可选择的HART ®电路230允许电路170有选择地监听电流回路156上携带 [0047] Additional optional HART ® circuit 230 allows the circuit 170 to selectively monitor the current circuit 156 carries

的4-20mA信号上的HART®消息。 The 4-20mA HART® message signal. 可以将例如测量后的过程变量、诊断信息或其它信息的 You can, for example after the measurement process variables, diagnostic information or other information

信息发送到无线接收机。 Send message to the wireless receiver. 此外,如果将HART ®电路230配置用于将数字信号调制在过程控 Further, if the HART ® circuit 230 configured to modulate a digital signal in the process control

制回路上,那么可以使用HART ®电路230远程地命令或询问与回路156相连的现场设备。 System back on the road, you can use HART ® circuit 230 remotely command or ask the field devices connected to the loop 156.

例如,可以将HART ®电路230配置作为4-20mA电流回路上的第二主机。 For example, the HART ® circuit 230 configured as 4-20mA current loop of the second host. HART ®电路230 HART ® circuit 230

与被配置作为完全收发机的RF电路232 —同工作,使无线主机单元(例如图3所示的手持设备80)能够与现场设备进行双向通信并对现场设备进行配置。 And it is configured as a full transceiver RF circuitry 232-- work with, so that the wireless master unit (e.g., as shown in FIG. 3 of the handheld device 80) is capable of two-way communication with the field devices and the field devices to be configured.

[0048] 也可以优选地使用微处理器224来实现诊断功能。 [0048] diagnostic functions can also be implemented using a microprocessor 224 preferably. 微处理器224被配置用于监控过程控制回路156的电压和电流特性,可以使用诊断技术来标识电流和电压中的异常或未决变化,并且将这些变化发送到远端位置,发送的方式可以是无线的,也可以使用电路230 提供的HART®发送能力,或通过将回路156上携带的电流电平设置为报警值或其它预定值。 The microprocessor 224 is configured to monitor voltage and current characteristics of process control loop 156 may be used to identify the current diagnostic techniques abnormal voltage or pending changes and and send those changes to a remote location, it may send is wireless, you can use the HART® circuitry 230 provides the ability to send or carried by the circuit 156 is set to a current level of alarm or other predetermined value.

[0049] 优选地,将电路170配置为允许在危险位置操作,并且满足适合的核准和规范,例如固有安全标准。 [0049] Preferably, the circuit 170 is configured to allow the operation in hazardous locations, and meet for the approval and specifications, such as inherent safety standards. 例如,固有安全保护190与固有安全额定电阻器180 —同用于电路170 的输入。 For example, intrinsic safety protection and intrinsically safe rated 190 Resistors 180-- with an input circuit 170. 使用适合的组件和电路布局,与齐纳二极管182并联的冗余齐纳二极管192的附加提供了一定程度的冗余,并限制了进入固有安全保护系统中这个电路的电压总值。 Use appropriate components and circuit layout, with a zener diode 182 in parallel redundant Zener diode is additionally provided a degree of redundancy 192, and limits inherent to enter the security system of this circuit voltage GDP. 相似地,检测电阻器180能够用于限制进入电路170的最大电流,并且对电路通过其外部端子对存储的能量进行的任意放电进行缓冲。 Similarly, the sense resistor 180 can be used to limit the maximum current into the circuit 170, and for any circuit through its external terminals to discharge the stored energy is buffered. 这提供了实质上为0的等效电容。 This provides an equivalent capacitance substantially zero. 回路测量电路还受到两个固有安全额定高值电阻器194的保护,所述两个电阻器194连接在检测电阻器180 的两端与滤波器220之间。 Loop measurement circuit is also protected by two intrinsically safe rated a high value resistor 194, 194 of the two resistors connected between the ends of the sense resistor 180 and filter 220. 通过使用填充材料等,可以保护其它电路组件远离任意的外部能量源,同时还避免了危险气体和蒸气到达电路170中任意的内部存储元件和节点。 By using a filler material, can protect the other circuit components away from any external energy source, but also to avoid the dangerous gases and vapors to reach the circuit 170 to any internal storage elements and nodes. 对于其它不危险的位置,可能不需要固有安全组件。 For other non-hazardous location, you might not intrinsically safe components.

[0050] 这里使用的术语“现场设备”可以是用于过程控制器监控系统的任意设备,并且不需要放置在“现场”。 [0050] As used herein, the term "field device" may be any device for process controller monitors the system and does not require placement in a "live." 设备可以位于过程控制系统中的任何地点,包括控制室或控制电路中。 Process control devices can be located anywhere in the system, including the control room or control circuit. 用于与过程控制系统相连的端子是指任意的电气连接,并且可能不包括物理的或分立的端子。 Terminals for the process control system connected refers to any electrical connection, and may not include physical or discrete terminals. 按照期望,可以使用任意适合的射频通信电路以及任意适合的通信协议、频率或通信技术。 As desired, you can use any suitable radio frequency communication circuitry, and any suitable communication protocol, frequency or communication technologies. 按照期望来配置电源电路,并且不限于这里提出的配置。 The power supply circuit is configured as desired, and is not limited to the configuration set forth herein. 在一些实施例中,现场设备包括地址,所述地址可以包括在任意的RF传输中,从而可以标识设备。 In some embodiments, the field device includes an address, the address may be included in any RF transmissions, which can identify the device. 相似地,这个地址能够用于确定接收到的信号是否与具体设备有关。 Whether Similarly, this address can be used to determine the received signal related to specific devices. 然而,在其它实施例中不使用地址,仅从无线通信电路发送数据而没有任何寻址信息。 However, the address is not used in other embodiments, the wireless communication circuit transmits only data without any addressing information. 在这种配置中,如果收到的数据是期望的,那么任意接收到的数据可能不包括寻址信息。 In this configuration, the data you receive is desirable, so any data received may not include addressing information. 在一些实施例中,这是可以接受的。 In some embodiments, this is acceptable. 在其它实施例中,可以使用其它寻址技术或识别技术,例如向具体设备分配具体的频率或通信协议、向具体设备分配具体的时隙或者其它技术。 In other embodiments, other addressing techniques or identification techniques, such as assigning a specific frequency or communication protocol to a particular device, assign specific slots or other technologies to specific devices. 可以使用任意适合的通信协议和/或组网技术,包括基于令牌的技术,其中令牌在设备之间切换,从而允许具体设备进行发送或接收。 You can use any suitable communication protocol and / or network technologies, including token-based technology, in which the token switch between devices, allowing for specific device to send or receive. [0051] 虽然参考优选实施例对本发明进行了描述,本领域的技术人员可以看出,在不背离本发明的精神和范围的前提下,可以在形式和细节上做出改变。 [0051] While the reference to a preferred embodiment of the present invention has been described, those skilled in the art can be seen, without departing from the spirit and scope of the present invention premise changes may be made in form and detail. 如这里所用,射频(RF) 能够包括任意频率的电磁传输,并且不限于特殊的频率组、频率范围或任意其它限制。 As used herein, a radio frequency (RF) can comprise electromagnetic transmissions of any frequency and is not limited to a particular group of frequencies, range of frequencies or any other limitation. 按照期望,可以使用任意的通信协议,包括IEEE 802. lib,802. 154或其它协议,包括私有的通信协议。 As desired, you can use any of the communication protocols, including IEEE 802. lib, 802. 154 or other protocols, including proprietary communication protocols.

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Classifications
International ClassificationG06F13/14, G05B19/418
Cooperative ClassificationY02P90/86, G05B2219/33192, G05B19/4185, Y02P90/18
European ClassificationG05B19/418N
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