CN205264050U - Microwave vehicles detection device based on earth magnetism guide - Google Patents
Microwave vehicles detection device based on earth magnetism guide Download PDFInfo
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- CN205264050U CN205264050U CN201521098740.XU CN201521098740U CN205264050U CN 205264050 U CN205264050 U CN 205264050U CN 201521098740 U CN201521098740 U CN 201521098740U CN 205264050 U CN205264050 U CN 205264050U
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Abstract
The utility model relates to a microwave vehicles detection device based on earth magnetism guide. The device is including earth magnetism detecting element, microwave detecting element and signal data processing unit. Signal data processing unit is through right the signal of earth magnetism detecting element and the output of microwave detecting element carries out the transform processing, accomplishes the detection to the vehicle. The utility model discloses utilize the advantage that earth magnetism detectivity is high, combine microwave vehicle test technique, realized the integration of vehicle magnetic field and microwave and survey in very little volume, improved the detection precision, detect the rate of accuracy and can reach 99.9%. Microwave detecting element works when only having the vehicle to roll away from or sail into, has reduced microwave detecting element's consumption, has lengthened the life of hardware, can conveniently use for a long time on battery powered equipment. Microwave detecting element adopts the mode to the microwave signal direct detection to realize the detection to static vehicle, has simplified microwave detecting element's hardware device.
Description
Technical field
The utility model belongs to intelligent transportation field, relates in particular to a kind of drawing based on earth magnetism in urban road or parking lot that be applied toThe microwave vehicle checkout gear of leading.
Background technology
Wagon detector has a very wide range of applications at intelligent transportation field. Traditional vehicle checking method has two kinds: Yi ZhongshiBy bury passing through of coil-induced vehicle underground in road. In the situation that there is no motor vehicle, magnetic field of the earth is in relatively stable shapeState; When motor vehicles cause the variation in magnetic field of the earth through out-of-date meeting. This mode accuracy rate is high, but construction working amount is large, byIn the larger road surface of needs cutting, very serious to the damage of road. Another kind method adopts magneto sensor to cause vehicleChanges of magnetic field detects. Checkout equipment in this method is highly sensitive, and volume is little, can application integration wireless communication technology,Outfit high capacity cell is made independent detector and is embedded in road or parking stall, and vehicle is detected. Due to this methodNeed the variation of Weak magentic-field in testing environment, testing result is easily subject to the interference of external magnetic field variation and environmental change, vehicleDetection accuracy be under some influence.
In recent years, microwave vehicle detector is widely applied. Microwave vehicle detector is by transmit/receive antenna, VCODevice (VCO), frequency mixer, intermediate frequency amplifier, measurement processor composition. VCO is operated in X frequency range or K frequency range, hasCertain modulating bandwidth, and in working frequency range, there is the higher linearity. The microwave letter of the vehicle reflection that reception antenna receivesNumber, first carry out mixing with VCO signal, then obtain difference frequency signal through filter and amplification, finally by measurement processor to this difference frequencySignal is sampled and is processed, obtain automobile storage information. The shortcoming of this detection method is to obtain returning of moving targetRipple information, corresponding static target, processor cannot be distinguished target echo and background return, and therefore, this detection scheme can not be to stoppingThe stationary vehicle in parking lot detects.
Summary of the invention
In order to solve the above-mentioned problems in the prior art, the utility model proposes a kind of microwave vehicle inspection based on earth magnetism guidingSurvey device, adopt geomagnetism detecting to detect with microwave the method combining vehicle is detected, improved accuracy of detection.
For achieving the above object, the utility model is taked following technical scheme:
Based on a microwave vehicle checkout gear for earth magnetism guiding, comprising: geomagnetism detecting unit, microwave detecting unit, number of signalsAccording to processing unit. Wherein,
The magnetic field variation signal that described geomagnetism detecting unit causes for obtaining detected vehicle, and this signal is delivered to described signalData processing unit.
Described microwave detecting unit comprises radiating portion and receiving unit, and described radiating portion is to detected vehicle launched microwave signal,Described receiving unit receives the line translation of going forward side by side of microwave signal that detected vehicle reflects and amplifies, described in then this signal being delivered toSignal-data processing unit.
Described signal-data processing unit is by carry out conversion place to the signal of described geomagnetism detecting unit and the output of microwave detecting unitReason, completes the detection to vehicle.
Further, described signal-data processing unit is mainly made up of microprocessor or DSP.
Further, described geomagnetism detecting unit is mainly made up of a magnetic field sensor.
Further, the radiating portion of described microwave detecting unit comprises microwave oscillator and microwave transmitting antenna. Described microwave shakesSwing device and export pulse modulated microwave signal under the pulse signal effect of described signal-data processing unit output, and by described micro-Ripple transmission antennas transmit is gone out.
Preferably, described microwave oscillator is DRO oscillator.
Further, the receiving unit of described microwave detecting unit comprises bandpass filter, the height of microwave antenna and cascadeAudio amplifier, wave detector and the video amplifier, the pulse echo signal of the detected vehicle of output is to described signal-data processing unit.
Further, the startup of described microwave detecting unit with close by described signal-data processing unit according to described geomagnetism detectingThe size of element output signal amplitude is controlled.
Further, described vehicle detection apparatus also comprises the wireless communication module being connected with described signal-data processing unit, realThe radio communication of existing described vehicle detection apparatus and host computer or server.
Compared with prior art, the utlity model has following beneficial effect:
(1) the utility model adopts joint-detection mode, utilizes the highly sensitive advantage of geomagnetism detecting, detects in conjunction with microwave vehicleTechnology has realized vehicle magnetic field and microwave integrative detection in very little volume, has greatly improved accuracy of detection, detects accurateReally rate can reach 99.9%.
(2) the utility model, by adopting joint-detection pattern, shortens the microwave detector working time, and power consumption reduces, the life-spanExtend, can on battery powered equipment, use for a long time easily.
(3) the utility model adopts direct detection mode (without mixing) to carry out microwave detection of the backscatter signal and just can realize staticThe detection of vehicle, has simplified the hardware unit of microwave detecting unit.
Brief description of the drawings
Fig. 1 is the composition frame chart of the microwave vehicle checkout gear based on earth magnetism guiding.
Detailed description of the invention
Below in conjunction with drawings and Examples, the utility model is described further.
The composition frame chart of the microwave vehicle checkout gear based on earth magnetism guiding as shown in Figure 1, comprising: geomagnetism detecting unit, microwaveDetecting unit, signal-data processing unit.
The magnetic field variation signal that geomagnetism detecting unit causes for obtaining detected vehicle, and this signal is delivered to described signal dataProcessing unit. Geomagnetism detecting unit is mainly made up of a magnetic field sensor, and the present embodiment adopts 3 axles (X, Y, Z) magnetic field to passSensor.
Microwave detecting unit comprises radiating portion and receiving unit.
Radiating portion comprises microwave oscillator and microwave transmitting antenna. Microwave oscillator is in the pulse of signal-data processing unit outputUnder signal function, export pulse modulated microwave signal, and gone out by microwave transmission antennas transmit. Preferably, microwave oscillator isDRO oscillator, adopts medium oscillation technology to carry out frequency synthesis, has short, the reliable advantage of working stability vibration Time Created.
Receiving unit receives and comprises that bandpass filter, high-frequency amplifier, wave detector and the video of microwave antenna and cascade putLarge device. The small-signal of the vehicle reflection that microwave antenna is received is first by band-pass filter, beyond filtering microwave carrier frequencySignal, then amplify through high-frequency amplifier, then after wave detector detection output video pulse signal, put finally by videoAfter amplifying, large device exports signal-data processing unit to. The utility model adopts the technology that microwave signal is directly carried out to detection, profitBy the strong feature of energy force rate ground return of vehicle chassis reflected microwave signal, can from ground clutter, effectively detect returning of vehicleRipple signal, have advantages of simple in structure, low in energy consumption, the reaction time is short.
The startup of microwave detecting unit with close by signal-data processing unit according to described geomagnetism detecting element output signal amplitudeSize is controlled: both do not had vehicle to sail into while also not having vehicle to roll away from, geomagnetism detecting element output signal amplitude is lower than thresholding 1,Output control signal in signal-data processing unit is closed microwave detecting unit; In the time having vehicle to sail into or roll away from, geomagnetism detecting unitAmplitude output signal exceed thresholding 1, output control signal in signal-data processing unit starts the work of microwave detecting unit. Due toMicrowave detecting unit is not always in running order, and the working time shortens, and power consumption reduces, and life can be easilyOn battery powered equipment, use for a long time.
Signal-data processing unit adopts microprocessor or DSP, by the letter to earth magnetism detecting unit and the output of microwave detecting unitNumber carry out conversion process, complete the detection to vehicle.
Vehicle detection apparatus also comprises and the wireless communication module of stating signal-data processing unit and being connected, and realizes described vehicle detection dressPut the radio communication with host computer or server.
The utility model is not limited to above-mentioned embodiment, and it is any aobvious and easy to above-mentioned embodiment that those skilled in the art makeThe improvement of seeing or change, can not exceed the protection domain of design of the present utility model and claims.
Claims (8)
1. the microwave vehicle checkout gear based on earth magnetism guiding, is characterized in that, described device comprises: geomagnetism detecting unit,Microwave detecting unit, signal-data processing unit; Wherein,
The magnetic field variation signal that described geomagnetism detecting unit causes for obtaining detected vehicle, and this signal is delivered to described signalData processing unit;
Described microwave detecting unit comprises radiating portion and receiving unit, and described radiating portion is to detected vehicle launched microwave signal,Described receiving unit receives the line translation of going forward side by side of microwave signal that detected vehicle reflects and amplifies, described in then this signal being delivered toSignal-data processing unit;
Described signal-data processing unit is by carry out conversion place to the signal of described geomagnetism detecting unit and the output of microwave detecting unitReason, completes the detection to vehicle.
2. the microwave vehicle checkout gear based on earth magnetism guiding according to claim 1, is characterized in that described number of signalsMainly formed by microprocessor or DSP according to processing unit.
3. the microwave vehicle checkout gear based on earth magnetism guiding according to claim 1, is characterized in that, described earth magnetism inspectionMeasurement unit is mainly made up of a magnetic field sensor.
4. the microwave vehicle checkout gear based on earth magnetism guiding according to claim 1, is characterized in that, described microwave inspectionThe radiating portion of measurement unit comprises microwave oscillator and microwave transmitting antenna; Described microwave oscillator is at described signal-data processing listUnder the pulse signal effect of unit's output, export pulse modulated microwave signal, and gone out by described microwave transmission antennas transmit.
5. the microwave vehicle checkout gear based on earth magnetism guiding according to claim 4, is characterized in that, described microwave shakesSwinging device is DRO oscillator.
6. the microwave vehicle checkout gear based on earth magnetism guiding according to claim 1, is characterized in that, described microwave inspectionThe receiving unit of measurement unit comprises that bandpass filter, high-frequency amplifier, wave detector and the video of microwave antenna and cascade putLarge device, the pulse echo signal of the detected vehicle of output is to described signal-data processing unit.
7. the microwave vehicle checkout gear based on earth magnetism guiding according to claim 1, is characterized in that, described microwave inspectionThe startup of measurement unit with close by described signal-data processing unit to enter according to the size of described geomagnetism detecting element output signal amplitudeRow is controlled.
8. the microwave vehicle checkout gear based on earth magnetism guiding according to claim 1, is characterized in that, described vehicle inspectionSurvey device and also comprise the wireless communication module being connected with described signal-data processing unit, realize described vehicle detection apparatus and upperThe radio communication of machine or server.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201521098740.XU CN205264050U (en) | 2015-12-24 | 2015-12-24 | Microwave vehicles detection device based on earth magnetism guide |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521098740.XU CN205264050U (en) | 2015-12-24 | 2015-12-24 | Microwave vehicles detection device based on earth magnetism guide |
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| CN205264050U true CN205264050U (en) | 2016-05-25 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105427622A (en) * | 2015-12-24 | 2016-03-23 | 上海展为软件技术有限公司 | Microwave vehicle detection device and method based on geomagnetism guidance |
| CN107730995A (en) * | 2017-11-21 | 2018-02-23 | 微传智能科技（常州）有限公司 | It is a kind of to combine parking space detection method and the system that data judge |
| CN112425031A (en) * | 2018-07-09 | 2021-02-26 | 动量动力学公司 | Vehicle alignment prior to wireless charging |
-
2015
- 2015-12-24 CN CN201521098740.XU patent/CN205264050U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105427622A (en) * | 2015-12-24 | 2016-03-23 | 上海展为软件技术有限公司 | Microwave vehicle detection device and method based on geomagnetism guidance |
| CN107730995A (en) * | 2017-11-21 | 2018-02-23 | 微传智能科技（常州）有限公司 | It is a kind of to combine parking space detection method and the system that data judge |
| CN112425031A (en) * | 2018-07-09 | 2021-02-26 | 动量动力学公司 | Vehicle alignment prior to wireless charging |
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Address after: 201206 No. 1888, Jinqiao Road, building 7, building 505, Shanghai, Pudong New Area Patentee after: Shanghai Exhibition for intelligent technology Limited by Share Ltd Address before: 201206 No. 7, building 1000, Golden Sea Road, Shanghai, Pudong New Area 505 Patentee before: SHANGHAI ZHANWEI SOFTWARE TECHNOLOGY CO., LTD. |