CN104076357A - Radar device and method used for detecting indoor moving target - Google Patents
Radar device and method used for detecting indoor moving target Download PDFInfo
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- CN104076357A CN104076357A CN201410323178.XA CN201410323178A CN104076357A CN 104076357 A CN104076357 A CN 104076357A CN 201410323178 A CN201410323178 A CN 201410323178A CN 104076357 A CN104076357 A CN 104076357A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
- G01S13/88—Radar or analogous systems specially adapted for specific applications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
- G01S13/02—Systems using reflection of radio waves, e.g. primary radar systems; Analogous systems
- G01S13/06—Systems determining position data of a target
- G01S13/08—Systems for measuring distance only
- G01S13/32—Systems for measuring distance only using transmission of continuous waves, whether amplitude-, frequency-, or phase-modulated, or unmodulated
- G01S13/34—Systems for measuring distance only using transmission of continuous waves, whether amplitude-, frequency-, or phase-modulated, or unmodulated using transmission of continuous, frequency-modulated waves while heterodyning the received signal, or a signal derived therefrom, with a locally-generated signal related to the contemporaneously transmitted signal
Abstract
The invention relates to a radar device and method used for detecting an indoor moving target. The radar device comprises an antenna array, a radar radio frequency transmitting-receiving unit, a signal processing unit and a control unit. The antenna array comprises a plurality of antenna units. The multiple antenna units are sequentially connected to the edge of an indoor area to be monitored in a surrounding mode. Each antenna unit comprises a transmitting antenna and two receiving antennas. The radar radio frequency transmitting-receiving unit is respectively connected with the transmitting antenna and the receiving antennas in each antenna unit. The signal processing unit is respectively connected with the radar radio frequency transmitting-receiving unit and the control unit. The control unit is respectively connected with the antenna units and the radar radio frequency transmitting-receiving unit. According to the radar device and the method, video pictures in the monitored area can not be collected, privacy in the monitored area can be accordingly protected, whether anomalies occur in the monitored area or not can be accurately judged, and an alarm is accordingly given.
Description
Technical field
The present invention relates to a kind of moving target pick-up unit, be specifically related to a kind of radar installations for indoor activity target detection and method.
Background technology
At present, conventional indoor activity object detecting device is mostly video monitoring, because video monitoring can gather indoor details, can know the picture in acquisition monitoring region, such as people's appearance, every act and every move etc., thereby video is widely used in indoor activity target detection.
But; in some special private occasion; need to carry out secret protection to the region of monitoring, avoid private residence inner case by video monitoring and in open state, now; video monitoring just cannot meet the demands; for example: for the monitoring in private residence, whether while there is no household in private residence, often just need to detect premises has " sound "; with this, judge have other people to enter premises, thereby report to the police.For another example: while only having old man in private residence, can just detect old man's activity, within a period of time, old man's activity do not detected, thereby can judge that old man may meet accident, and then send warning.
In addition, video monitoring need to just can reach required effect under certain light environment, so the usable range of video monitoring has suitable limitation.
Summary of the invention
Because above-mentioned the deficiencies in the prior art, the object of the invention is to overcome above-mentioned the deficiencies in the prior art and a kind of indoor activity object detecting device is provided, the active situation of this device in can sensing chamber, thereby judge indoor whether appearance extremely, and report to the police, and can be applicable to the environment of light darkness.
The technical scheme that realizes the object of the invention employing is: a kind of indoor activity object detecting device, and this device comprises:
Radar installations, described radar installations comprises aerial array, radar Transmit Receive Unit, signal processing unit and control module; Described aerial array comprises a plurality of antenna elements, described a plurality of antenna element is in turn connected into the center of being located at area to be monitored after ring, described antenna element comprises an emitting antenna and two receiving antennas, and described radar Transmit Receive Unit is connected with receiving antenna with the emitting antenna in described each antenna element respectively; Signal processing unit respectively described radar Transmit Receive Unit is connected with control module; Described control module is connected with radar Transmit Receive Unit with described antenna element respectively;
Communication network, described control module is connected in described communication network;
Cloud server, is connected in described communication network; And
Monitor terminal, is connected with described cloud server.
In technique scheme, described radar Transmit Receive Unit comprises signal generator module, digital to analog converter, voltage controlled oscillator and the power amplifier connecting successively, described signal generator module produces Continuous Wave with frequency modulation signal by accurate control voltage controlled oscillator, and the Continuous Wave with frequency modulation signal of generation transfers to emitting antenna successively after digital to analog converter, voltage controlled oscillator and power amplifier;
Described radar Transmit Receive Unit also comprises the low noise amplifier being connected with receiving antenna, and frequency mixer and analog to digital converter, described low noise amplifier exports frequency mixer to, the input of frequency mixer is also connected with described voltage controlled oscillator, the two-way echoed signal that frequency mixer is received two receiving antennas in an antenna element exports analog to digital converter to transmitting of voltage controlled oscillator generation respectively after mixing, and analog to digital converter transfers to signal processing unit by signal.
The present invention also provides a kind of method of indoor activity target detection, and the method comprises:
Produce the electromagnetic wave signal of periodic frequency increments, and launch to fixed-direction by the emitting antenna in antenna element;
Two receiving antennas in same antenna unit are received to echoed signals and carry out mixing with transmitting respectively, obtain difference frequency signal, after described difference frequency signal is sampled, deliver to signal processing unit;
Signal processing unit, after Fast Fourier Transform (FFT) and doppler processing, obtains range-to-go and speed; The phase differential of the echo receiving according to two receiving antennas in same antenna element again, obtains the accurate orientation of target.
Further, on the basis of described indoor activity object detection method, also built intelligent monitoring network, having comprised:
The orientation, distance and the velocity information that detect at every turn and process the target obtaining are transferred in cloud server by communication network, as the basis of later intellectual analysis; Cloud server can be learnt and train according to long-term detection data, on this basis the variation of indoor environment, clarification of objective, motion characteristics is made to identification, then carries out as required intelligent monitoring and early warning.
The present invention receives echoed signals by two receiving antennas in same antenna unit and carries out mixing with transmitting respectively, obtain difference frequency signal, after being processed, this difference frequency signal obtains the phase place that receives data to two, relatively after phase place, detect whether there is moving target, and calculate orientation, distance and the speed of target.Compare with existing indoor video monitoring, the video pictures of the present invention in can acquisition monitoring region, thereby can protect the privacy in guarded region, and can accurately judge in guarded region, whether occur abnormal, thereby give the alarm.In addition, the present invention adopts the monitoring effect of radar monitoring device can not be subject to the impact of ambient light, applied widely.
Accompanying drawing explanation
Fig. 1 is the structured flowchart of indoor activity target detection radar installations of the present invention.
Fig. 2 is the structured flowchart of radar installations.
Fig. 3 is the structural representation of the present embodiment aerial array used.
Fig. 4 is the structural representation of an antenna element in Fig. 2.
Fig. 5 is the structural representation of embodiment indoor activity target detection radar installations.
Fig. 6 is the process flow diagram of the present embodiment method.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
As depicted in figs. 1 and 2, indoor activity target detection radar installations of the present invention comprises radar installations, communication network, cloud server, radar installations and cloud server are all connected in communication network, and cloud server is also connected with alarm, mobile phone and the mailing system contacting with user.Radar installations used comprises aerial array, radar Transmit Receive Unit, signal processing unit and the control module connecting successively, and control module is also connected with radar Transmit Receive Unit with aerial array respectively.
As shown in Figure 3, the aerial array in the present invention comprises a plurality of antenna elements, and a plurality of antenna elements are in turn connected into the center of being located at area to be monitored after ring.As shown in Figure 4, each antenna element adopts single-emission and double-receiving pattern to realize accurate angle orientation, comprises an emitting antenna and two receiving antennas (receiving antenna 1 and receiving antenna 2).Control module according to regular time interval open successively some antenna elements, each antenna element can cover the scope of certain angle like this, utilize two receiving antennas in individual antenna unit to receive the phase differential of echo, can in the coverage of individual antenna unit, obtain the accurate angle of target.
The present embodiment be take equilateral octagon that 8 antenna elements connect and compose successively and is described as example, and this equilateral octagon is positioned at the center in space, guarded region place, forms whole spaces that this equilateral octagonal antenna element can cover guarded region.Control module carries out multichannel selection to eight antennas, and opens successively an antenna, and each antenna can cover the region of 45 ° like this.
As shown in Figure 5, radar Transmit Receive Unit of the present invention comprises signal generator module, digital to analog converter, voltage controlled oscillator and the power amplifier connecting successively, the present embodiment is usingd programmable gate array (FPGA) as signal generator module, by accurate control voltage controlled oscillator (VCO), produce Continuous Wave with frequency modulation (FMCW) signal, produce Continuous Wave with frequency modulation signal and after power amplifier, transfer to emitting antenna.Radar Transmit Receive Unit also comprises the low noise amplifier being connected with receiving antenna, and frequency mixer and analog to digital converter, two input ends of frequency mixer are connected with voltage controlled oscillator with low noise amplifier respectively, low noise amplifier exports frequency mixer to, the two-way echoed signal that frequency mixer is received two receiving antennas in an antenna element exports analog to digital converter to transmitting of voltage controlled oscillator generation respectively after mixing, and analog to digital converter transfers to signal processing unit by signal.
As shown in Figure 6, the course of work of indoor monitoring apparatus of the present invention is as follows:
1, after radar initialization completes, radar Transmit Receive Unit adopts Continuous Wave with frequency modulation mode (FMCW), programmable gate array modulation voltage controlled oscillator (VCO) produces the electromagnetic wave signal of periodic frequency increments, and launches to fixed-direction by emitting antenna.
2, two receiving antennas in same antenna unit receive echoed signals and carry out mixing with transmitting respectively, obtain difference frequency signal, after this difference frequency signal is sampled, deliver to signal processing unit processes.
3, signal processing unit obtains range-to-go and speed through Fast Fourier Transform (FFT) and doppler processing, with the explanation of above-mentioned phase differential (concrete as) after two a series of processing such as phase bit comparison that receive data, can detect and whether have moving target, and calculate concrete orientation, distance and the speed of target.
4, radar installations is transferred to by communication network the orientation, distance and the velocity information that detect at every turn and process the target obtaining in cloud server, as the basis of later intellectual analysis.Cloud server can be learnt and train according to long-term detection data, variation to indoor environment on this basis, clarification of objective (adult, child, pet), motion characteristics (are run, go slowly, fall) etc. make identification, then carry out as required intelligent monitoring and early warning, specifically comprise:
A. according to target volume, judge that whether this target is abnormal.
Difference due to distance, detections of radar to the volume size of target can there is error, cloud server is according to long-term data, and the environmental information running up to, the error that this is brought due to distance is revised, and to the corresponding modified value in each position, space, thereby obtains target volume more accurately, and then judge that target is adult, child or pet according to the size characteristic that target detected.By said method, obtain adult's height and the modified value of volume in family, when radar monitoring device detects the indoor height that occurs target and volume and adult's modified value incongruent time, cloud server gives the alarm to alarm, mobile phone or mailing system, reminds in this room and occurs abnormal object.
B. according to target state, judge that whether this target is abnormal.
Cloud server, according to long-term data, can detect the kinetic characteristic of target, for example: the target volume in same position is different, for squatting down or falling; Speed surpasses the value of normal person's walking, for running; Public arena has a large amount of targets to assemble, and is conflict or accident etc.While only having old man in room, if target detected when squatting down or falling state, may old man occur abnormal conditions, cloud server gives the alarm to alarm, mobile phone or mailing system, reminds geriatric state abnormal.
C. according to target custom state, send prompting message.
For long-term existence, in the target of radar detection area, cloud server is according to target basis, behavioural habits that can this target of long record, and length of one's sleep of every day for example, the surf time etc., thus by mobile phone or mail, target is reminded according to demand.
Claims (4)
1. for a radar installations for indoor activity target detection, it is characterized in that, comprising:
The radar installations of indoor activity target detection, described radar installations comprises aerial array, radar Transmit Receive Unit, signal processing unit and control module; Described aerial array comprises a plurality of antenna elements, described a plurality of antenna element is in turn connected into the center of being located at area to be monitored after ring, described antenna element comprises an emitting antenna and two receiving antennas, and described radar Transmit Receive Unit is connected with receiving antenna with the emitting antenna in described each antenna element respectively; Signal processing unit is connected with control module with described radar Transmit Receive Unit respectively; Described control module is connected with radar Transmit Receive Unit with described antenna element respectively;
Communication network, described control module is connected in described communication network;
Cloud server, is connected in described communication network; And
Monitor terminal, is connected with described cloud server.
2. the radar installations of indoor activity target detection according to claim 1, is characterized in that:
Described radar Transmit Receive Unit comprises signal generator module, digital to analog converter, voltage controlled oscillator and the power amplifier connecting successively, described signal generator module produces Continuous Wave with frequency modulation signal by accurate control voltage controlled oscillator, and the Continuous Wave with frequency modulation signal of generation transfers to emitting antenna successively after digital to analog converter, voltage controlled oscillator and power amplifier;
Described radar Transmit Receive Unit also comprises the low noise amplifier being connected with receiving antenna, and frequency mixer and analog to digital converter, described low noise amplifier exports frequency mixer to, the two-way echoed signal that frequency mixer is received two receiving antennas in an antenna element exports analog to digital converter to transmitting of voltage controlled oscillator generation respectively after mixing, and analog to digital converter transfers to signal processing unit by signal.
3. an indoor activity object detection method, is characterized in that, comprising:
Produce the electromagnetic wave signal of periodic frequency increments, and launch to fixed-direction by the emitting antenna in antenna element;
Two receiving antennas in same antenna unit are received to echoed signals and carry out mixing with transmitting respectively, obtain difference frequency signal, after described difference frequency signal is sampled, deliver to signal processing unit;
Signal processing unit, after Fast Fourier Transform (FFT) and doppler processing, obtains range-to-go and speed; The phase differential of the echo receiving according to two receiving antennas in same antenna element again, obtains the accurate orientation of target.
4. indoor activity object detection method according to claim 3, is characterized in that:
Set up intelligent monitoring network, the orientation, distance and the velocity information that detect at every turn and process the target obtaining are transferred in cloud server by communication network, as the basis of later intellectual analysis; Cloud server can be learnt and train according to long-term detection data, on this basis the variation of indoor environment, clarification of objective, motion characteristics is made to identification, then carries out as required intelligent monitoring and early warning.
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Cited By (23)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104280723A (en) * | 2014-10-22 | 2015-01-14 | 四川大学 | Method for processing newly built system track in radar clutter area |
| CN104574813A (en) * | 2014-12-19 | 2015-04-29 | 龙凤娇 | Radar lamp monitoring system and method |
| CN106127110A (en) * | 2016-06-15 | 2016-11-16 | 中国人民解放军第四军医大学 | A kind of human body fine granularity motion recognition method based on UWB radar with optimum SVM |
| CN106600902A (en) * | 2017-02-28 | 2017-04-26 | 广东工业大学 | Automatic detection human body tumble sensing method and device based on UWB feedback |
| CN107817494A (en) * | 2016-09-12 | 2018-03-20 | 中兴通讯股份有限公司 | signal processing method, device and mobile terminal |
| CN107959127A (en) * | 2017-11-13 | 2018-04-24 | 中山香山微波科技有限公司 | Radio freqency simulation system and its spherical array Anneta module |
| CN108594219A (en) * | 2018-06-11 | 2018-09-28 | 安徽中天保安服务集团有限公司 | One kind being used for the solitary monitoring system of specific group based on detections of radar |
| CN108965459A (en) * | 2018-08-02 | 2018-12-07 | 上海伟赛智能科技有限公司 | A kind of personnel activity's behavior detecting system based on radio-frequency technique |
| CN109100712A (en) * | 2018-08-17 | 2018-12-28 | 北京凌波微步信息技术有限公司 | It is a kind of to can be realized the radar ranging system remotely controlled |
| CN109239707A (en) * | 2018-08-27 | 2019-01-18 | 成都工业学院 | Behavior state detection device and method |
| CN110187341A (en) * | 2019-06-25 | 2019-08-30 | 珠海格力电器股份有限公司 | The monitoring method and system of physical activity posture, human body attitude monitor |
| CN110261867A (en) * | 2018-03-12 | 2019-09-20 | 松下知识产权经营株式会社 | Tracking device and tracking |
| CN110687530A (en) * | 2019-09-18 | 2020-01-14 | 上海广电通信技术有限公司 | Miniature security radar monitoring system |
| CN111175741A (en) * | 2020-01-10 | 2020-05-19 | 浙江大学 | Single-frequency continuous millimeter wave Doppler sensing microwave wall safety space early warning method |
| CN111289974A (en) * | 2018-12-10 | 2020-06-16 | 中铁一局集团有限公司 | Tunnel full-section rack method rapid detection system and operation control method thereof |
| CN111337891A (en) * | 2020-03-23 | 2020-06-26 | 中国人民解放军陆军炮兵防空兵学院士官学校 | Fault diagnosis instrument and fault diagnosis method for moving target reconnaissance and calibration radar |
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| CN112230223A (en) * | 2020-12-11 | 2021-01-15 | 北京雷信科技有限公司 | Microwave radar device for high-precision positioning of vehicle |
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| CN104280723A (en) * | 2014-10-22 | 2015-01-14 | 四川大学 | Method for processing newly built system track in radar clutter area |
| CN104574813A (en) * | 2014-12-19 | 2015-04-29 | 龙凤娇 | Radar lamp monitoring system and method |
| JP7244557B2 (en) | 2016-05-13 | 2023-03-22 | グーグル エルエルシー | System, method and device for utilizing radar in smart devices |
| JP2021099361A (en) * | 2016-05-13 | 2021-07-01 | グーグル エルエルシーＧｏｏｇｌｅ ＬＬＣ | System, method, and device for utilizing radar with smart device |
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| CN108594219A (en) * | 2018-06-11 | 2018-09-28 | 安徽中天保安服务集团有限公司 | One kind being used for the solitary monitoring system of specific group based on detections of radar |
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| CN109100712A (en) * | 2018-08-17 | 2018-12-28 | 北京凌波微步信息技术有限公司 | It is a kind of to can be realized the radar ranging system remotely controlled |
| CN109239707A (en) * | 2018-08-27 | 2019-01-18 | 成都工业学院 | Behavior state detection device and method |
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| CN111175741A (en) * | 2020-01-10 | 2020-05-19 | 浙江大学 | Single-frequency continuous millimeter wave Doppler sensing microwave wall safety space early warning method |
| CN111337891A (en) * | 2020-03-23 | 2020-06-26 | 中国人民解放军陆军炮兵防空兵学院士官学校 | Fault diagnosis instrument and fault diagnosis method for moving target reconnaissance and calibration radar |
| CN111337891B (en) * | 2020-03-23 | 2023-05-12 | 中国人民解放军陆军炮兵防空兵学院士官学校 | Movable target reconnaissance radar fault diagnosis instrument and diagnosis method |
| CN112230222B (en) * | 2020-12-11 | 2021-03-16 | 北京雷信科技有限公司 | Microwave radar device for recognizing vehicle type |
| CN112230223B (en) * | 2020-12-11 | 2021-03-02 | 北京雷信科技有限公司 | Microwave radar device for high-precision positioning of vehicle |
| CN112230223A (en) * | 2020-12-11 | 2021-01-15 | 北京雷信科技有限公司 | Microwave radar device for high-precision positioning of vehicle |
| CN112230222A (en) * | 2020-12-11 | 2021-01-15 | 北京雷信科技有限公司 | Microwave radar device for recognizing vehicle type |
| CN113229802A (en) * | 2021-03-08 | 2021-08-10 | 西安交通大学 | Single-device WiFi indoor height detection method based on phased array principle |
| CN113162940A (en) * | 2021-04-27 | 2021-07-23 | 深圳深度探测科技有限公司 | Array antenna radar for night monitoring, threshold value training and rule evaluation system and management method |
| TWI797776B (en) * | 2021-10-14 | 2023-04-01 | 建國科技大學 | Fall detector of radar technology |
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