CN1297417C - Tyre pressure monitoring system of vehicle - Google Patents
Tyre pressure monitoring system of vehicle Download PDFInfo
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- CN1297417C CN1297417C CNB031356508A CN03135650A CN1297417C CN 1297417 C CN1297417 C CN 1297417C CN B031356508 A CNB031356508 A CN B031356508A CN 03135650 A CN03135650 A CN 03135650A CN 1297417 C CN1297417 C CN 1297417C
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- tire pressure
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- tyre pressure
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Abstract
The present invention relates to an automobile tyre pressure monitoring system comprising a tyre pressure receiving display and a tyre pressure sensing transmitter, wherein the signals between the tyre pressure receiving display and the tyre pressure sensing transmitter are connected with each other in a wireless transmission mode; the tyre pressure receiving display comprises a radio frequency receiving circuit, a microcontroller circuit, a display circuit, a power supply, a status setting key, a tyre pressure display window, a tyre status indicator lamp and a buzzer; the radio frequency receiving circuit, the microcontroller circuit, the display circuit and the power supply are arranged in a box body, and the status setting key, the tyre pressure display window, the tyre status indicator lamp and the buzzer are arranged on a panel of the box body; and the tyre pressure sensing transmitter comprises a battery arranged under the circuit board, a sensor circuit arranged on the circuit board, a microcontroller circuit and a radio frequency transmitting circuit. The present invention is characterized in that a rubber container is arranged on the circuit board, and an enclosed cavity body filled with liquid forms between the rubber container and circuit board. The present invention solves the technical problem of difficulty in real time monitoring of the tyre pressure of medium-size and large coaches and trucks. The present invention has the advantages of less error in pressure transmission, safety, reliability, and convenient installation and replacement.
Description
Technical field
The present invention relates to the vehicle safety travel monitoring facilities, be specifically related to the automobile tire pressure monitoring system of inner tube of a tyre formula.
Background technology
Automobile tire pressure deficiency in the process of moving can cause auto tire wear serious, and consumption increase is difficult to handle problems such as control, even tyre break occurs, causes the accident of car crash to take place.In order to strengthen automobile safety in the process of moving, must monitor in real time the pressure of motor tire, in time remind chaufeur to note the tire pressure situation of change, take corresponding measure.Original automotive tire pressure supervisory system TPMS (Tire Pressre Meare System) is used to monitor that the pressure of inner tube free tire changes, and the inner tube free tire bearing capacity is little, can only be used for car or Light-duty Vehicle.Because, large and medium-sized above passenger and freight car all install bearing capacity big inner tube of a tyre formula tire arranged, so, original automotive tire pressure supervisory system TPMS can not in running at high speed, the pressure of the tire of large-scale above passenger and freight car carries out real time monitoring.As 6 phases of "China Electronics News" of distribution on December 2nd, 1999, reported " a kind of air pressure of automobile tire monitoring system " that German Mercedes releases, this system is made up of tire pressure sensor, high frequency detector and control setup.When any one tire pressure was lower than the standard value of defined on the automobile, the alarm lamp that is contained on the automobile instrument panel will send alerting signal to chaufeur, and the monitoring tire pressure accurately and reliably.But this system changes not reaction to the caused pressure of temperature traverse, and therefore, hot air can not cause warning to the influence of tire.In order to prevent wrong report, two pressure sensors have been installed all on each tire.The disclosed name of CN1479678 is called " watch-dog of air pressure in tyres of vehicle and method ", and its watch-dog comprises: the computer device, of difference of definite device, vehicle wheel rotational speed or wheel velocity parameter that automotive wheel rotating speed or other characterize the parameter of vehicle wheel velocities analyzed these differences and a rated value error and the device of an alerting signal of generation when this rated value error surpasses a threshold value.In addition, this watch-dog also comprises a device that is used for directly measuring the inflation pressure in the tire and the parameter of this inflation pressure of sign is delivered to analytical equipment, when the error of a parameter that characterizes this inflation pressure and a rated value surpassed a corresponding threshold value, an alerting signal took place in this analytical equipment.The name of CN2092452 bulletin is called the patent of " motor tire infrabar annunciator ", and the automobile tyre low pressure annunciator of this patent is to open an osculum on automobile rim, and installation sleeve cartridge type sensor thereon, and gang switch is installed on brake disc.When air pressure of automobile tire dropped to certain value, the dimension bar of sleeve-type sensor just was pushed out, and drove gang switch, connected the circuit of buzzer phone, and realization is in time reported to the police.The name of CN2108338 bulletin is called the patent of " air pressure of automobile tire is applied to install and put ", and this device is made up of institutes such as compression indicator, valve unitor, ultrasonic transmitter and receptors.Setting pressure pointer and qualification pressure control pointer in compression indicator, two pointers do not contact mutually, and meet lead a or lead b respectively, the other end joining power of lead a, the other end of lead b connects ultrasonic transmitter, ultrasonic transmitter connects lead c and joining power, compression indicator, battery (power supply) and ultrasonic transmitter are installed in the fixed bin, fixed bin is installed on the wheel semiaxis, compression indicator meets the pressure ventilation flue, and ventilation flue's the other end is installed the valve unitor and linked to each other with cranked tire valve.The tire pressure sensing transmitter of the pressure monitoring system of inner tube free tire is to place the tire air, does not exist the pressure that brings because of non-sensor chip to read error; Structural requirement to transmission circuit is not high, can optimum transmit in air as long as satisfy.Though there is the tire pressure sensing transmitter of inner tube of a tyre formula tire pressure monitoring system also can place in the tire, but to the designing requirement height of circuit, each tire pressure sensing transmitter must be installed in the cooresponding tire, can not exchange, so installation is changed very inconvenient.The valve inside place that the tire pressure sensing transmitter is installed in the inner tube of a tyre is also arranged, change conveniently, come off easily and lose poor stability though install.
Summary of the invention
The purpose of this invention is to provide a kind of automobile tire pressure monitoring system, it can detect and show the pressure of inner tube of a tyre formula motor tire in real time, when the tire overvoltage with when under-voltage, utilization acousto-optic mode reminds chaufeur to note the tire pressure situation, and the situation that prevents to blow out takes place; When tire pressure just often, can also improve the operating efficiency of automobile, reduce oil consumption.
Automobile tire pressure monitoring system of the present invention comprises that the tire pressure of installing in the operator's compartment receives telltale and the more than one tire pressure sensing transmitter that is installed on the motor tire; The signal contact that tire pressure receives between telltale and the tire pressure sensing transmitter is a wireless transmission method; Tire pressure receives the every chassis of telltale and only installs one, its function is the tire pressure signal that receives the emission of tire pressure sensing transmitter, by display of tyre pressure data after handling, and judges whether tire pressure is normal, as under-voltage or overvoltage, will remind chaufeur by the acousto-optic mode; One of every mounting of tyre of tire pressure sensing transmitter, its function are the pressure data that pressure sensor measures to be transmitted into tire pressure by the radio transmission mode receive telltale.
Tire pressure receives telltale and comprises radio-frequency (RF) receiving circuit, microcontroller circuit, display circuit and the power supply that is located in the box body, and the state that is located on the box body panel is provided with key, tire pressure display window, tire condition indicator lamp and buzzer phone.Radio-frequency (RF) receiving circuit receives ic chip 1 by radio frequency, antenna filter network C12, C14, L2, the low-noise antenna radio frequency amplifier (RFA), ground connection series resonant network L1, C13, shunt capacitance C3, C1, data high pass cutoff frequency capacitor C 7, phaselocked loop reference frequency crystal X1 and matching capacitance C15, phaselocked loop comparator output pulse low-pass filter network R1, C8, C9, LPF power supply shunt capacitance C2, data demodulates power supply shunt capacitance C4 forms, its effect is that the ASK radiofrequency signal by antenna is passed through the antenna filter network to IC1 in-to-in low noise amplifier LNA, the local frequency that produces through inner VCO produces an intermediate-freuqncy signal in inner mixing, and intermediate-freuqncy signal is amplified through the filtering amplitude limit and demodulated data-signal and output to the microcontroller integrated package from the data terminal DATA of IC1.Microcontroller circuit is by IC2, crystal X2, crystal matching capacitance C16, C17, and reseting network R4, C5 are provided with circuit SW1, R3, and buzz circuit B1, R5 form; Wherein the effect of IC2 is that the identification of decoding is handled and produced pressure data and send display circuit to the data that IC1 comes, and when pressure data produced mal, IC2 produced an alerting signal and send buzzer phone to produce alarm sound; The effect of crystal X2 is to produce the required electric capacity clock of IC2; The effect of reset circuit is to produce the time-delay low level reset signal that powers on; The effect that circuit is set is the different conditions that microcontroller ic chip 2 is set.Display circuit shows charactron N1 by dibit, arithmetic point field current-limiting resistance R10, show select lines control circuit Q1, Q2, Q3, resistance R 6, R7, R8, tire shows light-emitting diode D1, D2, D3, D4, D5, D6, D7, and display field current-limiting resistance R9, R11, R12, R13, R14, R15, R16 form; Wherein dibit shows that the effect of charactron N1 is to show pressure data, and Q1, R6 are the high-order charactrons of gating control N1, and Q2, R7 are gating control N1 low level charactrons, and Q3, R8 are that gating control tire shows light-emitting diode.Power supply is made up of ZN1, V2, V4, RZ, R2, C10, C11, and wherein ZN1 external automobile storage battery offers voltage stabilizer V2 and V4 with automobile storage battery voltage; R2, RZ are protective resistance,, C10, C11 be filter capacitor.
The tire pressure sensing transmitter comprises battery, the sensor circuit that is located at circuit board top, microcontroller circuit and the radiofrequency launcher circuit that is located at below the circuit card, on circuit card, be provided with rubber pocket, the edge and the board edge of rubber pocket are close to, and be stuck in the encapsulation crimping metal frame, be filled with liquid in the osed top cavity that between rubber pocket and circuit card, forms; Except that the top of rubber pocket, all the other all are sealed in the rubber sheath with poting materials with upper member.Sensor electrical route set of sensors becomes piece U1 and pull-up resistor R1 composition, and its effect is the pressure physical quantity that integrated U1 window of sensor obtains to be obtained pressure data through amplification sampling processing output to microcontroller; U1 regularly sends data such as interrupt signal, reset signal and delivery pressure to microcontroller integrated package U2; And receive gating signal, clock signal, the command signal that microcontroller integrated package U2 sends; The effect of pull-up resistor R1 is to keep high level during for output data at U1.Microcontroller circuit is made up of microcontroller integrated package U2, crystal X1, crystal matching capacitance C2, C3; Wherein microcontroller integrated package U2 works and receives the pressure data that U1 transmits, and outputs to radiofrequency launcher again after microcontroller integrated package U2 handles; U2 receives interrupt signal, the reset signal that U1 comes; The I/O mouth of U2 produces select lines NCS, DOL Data Output Line SDO, clock line CLK, the Data In-Line SDI that U1 needs; The effect of crystal X1 is the clock signal that produces microcontroller; The effect of C2, C3 is the matched crystal oscillator, to produce accurate oscillation frequency.The radio-frequency transmissions circuit is made up of ballistic transistor Q1, emitting antenna A1, capacitor C 1, C4, C5, C6, resistance R 3 crystal X2; The effect of ballistic transistor Q1 is that generation rf oscillation signal and amplifying emission are gone out; The effect of emitting antenna A1 is an emitting radio frequency signal effectively, and as strength circuit inductance part; Capacitor C 1 and C4 are strength electric capacity; C6 is an output coupling capacitor; C5 is that strength exchanges shunt capacitance; The effect of resistance R 3 provides strength and amplifies bias current; When microcontroller U2 data-signal is high level, radio freqneucy oscillator amplification work, when being low level, radio freqneucy oscillator is not worked, and goes out by transmission antennas transmit thereby produce an ASK radiofrequency signal.
Described automobile tire pressure monitoring system, its tire pressure sensing transmitter are installed between the inner tube of a tyre and tyre cushion of motor tire, the top of rubber pocket and inner tube of a tyre closed contact.Can obtain the power F that unit area bears on the motor tire inner tube of a tyre, i.e. pressure P easily like this.The pressure P that rubber pocket obtains is delivered to the pressure sensing chip of sensor circuit by pressure transmission medium, thereby make circuit card obtain pressure data, after amplifying collection sampling processing, through the transmission antennas transmit of radio-frequency transmissions circuit, the tire pressure reception telltale that is installed in the operator's compartment can be received the signal that the tire pressure sensing transmitter sends.
Described automobile tire pressure monitoring system, the liquid of filling is silicone oil or liquid fat in the osed top cavity that forms between the rubber pocket of tire pressure sensing transmitter and circuit card.As the transmission of pressure media, transfer the pressure to sensor with liquid, effect is best.
The invention solves original automotive tire pressure supervisory system TPMS can not in running at high speed, the pressure of the tire of large-scale above passenger and freight car carries out the real time monitoring technical matters, not only the transmission of pressure error is little, safe and reliable, and install change convenient.
Description of drawings
Fig. 1 is a running condition scheme drawing of the present invention.
Fig. 2 is the structural representation of tire pressure sensing transmitter.
Fig. 3 is the circuit diagram that tire pressure receives telltale.
Fig. 4 is the circuit diagram of tire pressure sensing transmitter.
The specific embodiment
Referring to Fig. 1 and Fig. 2, radio-frequency (RF) receiving circuit 11, microcontroller circuit 12, display circuit 13 and power supply 14 will be provided with in the box body 10, box body 10 panels are provided with tire pressure that state is provided with key 15, tire pressure display window 16, tire condition indicator lamp 17 and buzzer phone 18 and receive telltale 1 to be installed in vehicle drive indoor, and power supply 14 is connected with automotive battery; With sensor circuit 22, microcontroller circuit 23 and radio-frequency transmissions circuit 24 be installed in circuit card 20 above, battery 21 be installed in circuit card 20 below, rubber pocket 25 be buckled in circuit card 20 above, the edge of rubber pocket 25 and the edge of circuit card 20 are close to, and be stuck in the encapsulation crimping metal frame 26, filling silicone oil 27 in the osed top cavity that between rubber pocket 25 and circuit card 20, forms, then, use poting materials---epoxy resin 28 will be sealed in except that the remaining part the top of rubber pocket 25 in the rubber sheath 29, promptly constitute tire pressure sensing transmitter 2.Tire pressure sensing transmitter 2 is installed between the inner tube of a tyre and tyre cushion of motor tire, tire pressure sensing transmitter 2 of every mounting of tyre, and make the top and the inner tube of a tyre closed contact of rubber pocket 25.
During use, open automobile power source earlier, tire pressure receives buzzer phone 18 short the rings one of telltale 1, the expression automobile tire pressure monitoring system is started working, if tire pressure is arranged outside given range of pressure, buzzer phone 18 15S that after short ring one, can pipe continuously, the tire condition indicator lamp 17 of representing tire location simultaneously can glimmer, flash speed is slower during subnormal pressure, about 2S flicker once, flash speed is very fast when being higher than normal pressure, and about 1S flicker once reminds chaufeur to note having tire not within normally-pressured neighbor.If have tire pressure and normal pressure to differ too big, buzzer phone 18 can pipe always, and tire condition indicator lamp 17 can not stop in flicker, reminds chaufeur must give tire aerating or venting.Tire pressure just often represents that the tire condition indicator lamp 17 of tire location can not glimmer, and the tire condition indicator lamp of Chang Liang represents that the numeral that the LED charactron shows is the pressure data of this position tire.
When needs circulation display of tyre pressure, can key 15 be set by the state that tire pressure receives telltale 1, it is shinny successively that tire condition indicator lamp 17 can be pressed the near front wheel → off front wheel → off hind wheel → left rear wheel → (wheel in right back → left back interior wheel →) the near front wheel, whenever press once, the change in location that tire condition indicator lamp 17 is lighted once, the numerical value of LED charactron indication tire status indicator lamp 17 is lighted the tire pressure of position.When circulation display of tyre pressure, if the tire pressure mal of this position, tire condition indicator lamp 17 can normal bright 5S, flicker then.
If the tire pressure sensing transmitter 2 that is installed on the tire damages, do not receive signal in two hours, then the tire condition indicator lamp 17 of correspondence position can glimmer equally always, and buzzer phone 18 can pipe and stop behind the 15S simultaneously.When key 15 being set choosing this position tire pressure and show by state, tire pressure display window 16 can displaying symbols " nP ".
Claims (3)
1, automobile tire pressure monitoring system comprises that the tire pressure of installing in the operator's compartment receives telltale (1) and is installed in more than one tire pressure sensing transmitter (2) on the motor tire; The signal contact that tire pressure receives between telltale (1) and the tire pressure sensing transmitter (2) is a wireless transmission method; Tire pressure receives telltale (1) and comprises that radio-frequency (RF) receiving circuit (11), microcontroller circuit (12), display circuit (13) and the power supply (14) that is located in the box body (10), the state that is located on box body (10) panel are provided with key (15), tire pressure display window (16), tire condition indicator lamp (17) and buzzer phone (18); Tire pressure sensing transmitter (2) comprises battery (21), the sensor circuit (22) that is located at circuit board top, microcontroller circuit (23) and the radio-frequency transmissions circuit (24) that is located at below the circuit card (20), it is characterized in that on circuit card (20), being provided with rubber pocket (25), the edge of rubber pocket (25) and circuit card (20) edge are close to, and be stuck in the encapsulation crimping metal frame (26), be filled with liquid (27) in the osed top cavity that between rubber pocket (25) and circuit card (20), forms; Except that the top of rubber pocket (25), all the other all use poting materials (28) to be sealed in the rubber sheath (29) with upper member.
2, automobile tire pressure monitoring system according to claim 1 is characterized in that tire pressure sensing transmitter (2) is installed between the inner tube of a tyre and tyre cushion of motor tire the top of rubber pocket (25) and inner tube of a tyre closed contact.
3, automobile tire pressure monitoring system according to claim 1, the liquid (27) of filling is silicone oil in the osed top cavity that it is characterized in that forming between the rubber pocket (25) of tire pressure sensing transmitter (2) and circuit card (20).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031356508A CN1297417C (en) | 2003-08-20 | 2003-08-20 | Tyre pressure monitoring system of vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031356508A CN1297417C (en) | 2003-08-20 | 2003-08-20 | Tyre pressure monitoring system of vehicle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1583435A CN1583435A (en) | 2005-02-23 |
| CN1297417C true CN1297417C (en) | 2007-01-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB031356508A Expired - Fee Related CN1297417C (en) | 2003-08-20 | 2003-08-20 | Tyre pressure monitoring system of vehicle |
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| Country | Link |
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| CN (1) | CN1297417C (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7218209B2 (en) * | 2005-03-16 | 2007-05-15 | General Motors Corporation | Method and apparatus for determining correct tire pressure inflation during adjustment |
| CN101580003B (en) * | 2009-06-17 | 2012-12-26 | 厦门海合达汽车电器有限公司 | Vehicle tyre pressure monitoring and alarm device displayed by vehicle model |
| FR2950691B1 (en) * | 2009-09-30 | 2012-05-04 | Michelin Soc Tech | SEALED PRESSURE MEASURING MEMBER |
| US9248709B2 (en) | 2013-06-13 | 2016-02-02 | Infineon Technologies Ag | RFID-tag, a TPMS device, a tire, a receiver device and a method for providing information related to identification of a tire |
| CN105270115A (en) * | 2014-06-19 | 2016-01-27 | 天津城建大学 | Magnetic sensing-based indirect-type automobile tire state monitoring system |
| CN105280571A (en) * | 2014-06-23 | 2016-01-27 | 中国石油化工股份有限公司 | Microchip tracer packaging structure and packaging method |
| CN104494374B (en) * | 2014-12-31 | 2016-11-23 | 广东远峰汽车电子有限公司 | A kind of tire detecting system |
| CN114112444A (en) * | 2021-11-13 | 2022-03-01 | 合肥平流层航空科技有限公司 | Method and device for measuring tire stress |
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|---|---|---|---|---|
| US5483826A (en) * | 1989-12-20 | 1996-01-16 | Tjs Development Corporation, Inc. | Remotely actuated pressure sensor responsive to an actuating signal |
| US5500065A (en) * | 1994-06-03 | 1996-03-19 | Bridgestone/Firestone, Inc. | Method for embedding a monitoring device within a tire during manufacture |
| US5540092A (en) * | 1994-10-31 | 1996-07-30 | Handfield; Michael | System and method for monitoring a pneumatic tire |
| JPH08244423A (en) * | 1995-03-08 | 1996-09-24 | Yokogawa Electric Corp | Tire pressure monitoring system |
| US5602524A (en) * | 1992-02-26 | 1997-02-11 | Mock; Markus | Device for monitoring the air-pressure in pneumatic tires fitted on vehicle wheels |
| JP2001322411A (en) * | 2000-05-12 | 2001-11-20 | Denso Corp | Air-pressure detecting device and tire condition monitoring system |
| WO2002062597A1 (en) * | 2001-02-08 | 2002-08-15 | Denso Corporation | Tire pneumatic pressure detector |
| CN1388018A (en) * | 2001-05-29 | 2003-01-01 | 敦扬科技股份有限公司 | Pressure monitoring method and device for inflated tyre |
-
2003
- 2003-08-20 CN CNB031356508A patent/CN1297417C/en not_active Expired - Fee Related
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5483826A (en) * | 1989-12-20 | 1996-01-16 | Tjs Development Corporation, Inc. | Remotely actuated pressure sensor responsive to an actuating signal |
| US5602524A (en) * | 1992-02-26 | 1997-02-11 | Mock; Markus | Device for monitoring the air-pressure in pneumatic tires fitted on vehicle wheels |
| US5500065A (en) * | 1994-06-03 | 1996-03-19 | Bridgestone/Firestone, Inc. | Method for embedding a monitoring device within a tire during manufacture |
| US5540092A (en) * | 1994-10-31 | 1996-07-30 | Handfield; Michael | System and method for monitoring a pneumatic tire |
| JPH08244423A (en) * | 1995-03-08 | 1996-09-24 | Yokogawa Electric Corp | Tire pressure monitoring system |
| JP2001322411A (en) * | 2000-05-12 | 2001-11-20 | Denso Corp | Air-pressure detecting device and tire condition monitoring system |
| WO2002062597A1 (en) * | 2001-02-08 | 2002-08-15 | Denso Corporation | Tire pneumatic pressure detector |
| CN1388018A (en) * | 2001-05-29 | 2003-01-01 | 敦扬科技股份有限公司 | Pressure monitoring method and device for inflated tyre |
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| Publication number | Publication date |
|---|---|
| CN1583435A (en) | 2005-02-23 |
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