CN203825191U - Radar velocity measurement apparatus based on angle compensation - Google Patents
Radar velocity measurement apparatus based on angle compensation Download PDFInfo
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- CN203825191U CN203825191U CN201420134293.8U CN201420134293U CN203825191U CN 203825191 U CN203825191 U CN 203825191U CN 201420134293 U CN201420134293 U CN 201420134293U CN 203825191 U CN203825191 U CN 203825191U
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- control chip
- main control
- velocity measurement
- angle
- radar velocity
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Abstract
The utility model discloses a radar velocity measurement apparatus based on angle detecting. The radar velocity measurement apparatus includes an antenna, a microstrip circuit transmit-receive system, an analog-to-digital conversion module, a master control chip and an inclination sensor. The antenna is used for transmitting a signal to a target and receiving a reflection signal of the target. The microstrip circuit transmit-receive system is used for mixing the transmitting signal and the received signal of the antenna. The analog-to-digital conversion module is used for converting the signal after the frequency mixing into a digital signal. The inclination sensor is used for measuring an inclination angle of the radar velocity measurement apparatus relative to a horizontal plane. The master control chip is used for outputting an actual velocity of the target according to the digital signal and the inclination angle. According to an embodiment, an inclination sensor is added to the radar velocity measurement apparatus, and the velocity of the target is modified according to an angle measured by the inclination sensor. Compared with a conventional radar velocity measurement apparatus, the radar velocity measurement apparatus based on angle compensation helps to improve the accuracy of velocity measurement.
Description
Technical field
The utility model relates to radar velocity measurement technology, relates in particular to a kind of radar velocity measurement device based on angle compensation.
Background technology
Along with the high speed development of domestic intelligent transportation industry, Microwave Velocity radar is widely used in testing the speed in the traffic intelligent managing and control systems such as bayonet socket management, overspeed snapping system and mobile electronic policeman, and becomes gradually the core sensor of Intelligent traffic management systems.
In prior art, during with radargrammetry car speed, what radar was directly measured is the velocity amplitude of the relative radar wave transmit direction motion of vehicle, and as shown in Figure 1, the speed that radar is directly measured is V
survey, and the actual speed of vehicle is V
carso, obtain the actual speed V of vehicle
car, need the first setting angle θ of instrumentation radar of engineering staff, then by setting angle θ input radar, by radar, carried out exporting after angle modification the actual speed V of vehicle
car.In prior art, setting angle θ need to measure horizontal range s and radar setting height(from bottom) h conventionally, then according to trigonometric function relation, calculates the value of θ,
Adopt said method to obtain the setting angle of radar, all have larger measuring error measuring aspect horizontal range and setting height(from bottom), thereby caused the error of vehicle actual speed of radar output larger.
Utility model content
In view of this, the utility model embodiment provides a kind of radar velocity measurement device based on angle compensation, to improve the accuracy of radar velocity measurement.
The utility model embodiment provides a kind of radar velocity measurement device based on angle compensation, comprising: antenna, microstrip circuit receive-transmit system, analog-to-digital conversion module, main control chip and obliquity sensor,
Described antenna is used for transmitting to object, and receives the reflected signal of described object;
Described microstrip circuit receive-transmit system being for by the transmitting and receive signal mixing of described antenna, and mixed frequency signal is sent to described analog-to-digital conversion module;
Described analog-to-digital conversion module, for described mixed frequency signal is converted to digital signal, sends to described main control chip;
Described obliquity sensor is used for measuring described radar velocity measurement device angle of inclination with respect to the horizontal plane, and the angle of inclination measuring is sent to described main control chip;
The actual speed that described object is exported at the digital signal that described main control chip receives for basis and described angle of inclination.
Further, described main control chip is the chip of digital signal processor DSP or STM32 series.
Further, described main control chip comprises: data processing unit and angle modification unit;
Described data processing unit, for according to the digital signal receiving, obtains described object along the speed of described antenna transmission sense;
The speed of described angle modification unit for getting according to described angle of inclination and described data processing unit, exports the actual speed of described object.
Further, described obliquity sensor adopts twin shaft to measure.
Further, described device also comprises: pretreatment unit, be connected with described analog-to-digital conversion module with described microstrip circuit receive-transmit system, described pretreatment unit for described mixed frequency signal is amplified, filtering, and amplification, filtered signal are sent to described analog-to-digital conversion module.
Further, described device also comprises: clock source, is connected with described main control chip, for the clock signal of described main control chip work is provided.
Further, described device also comprises: external memory storage, is connected with described main control chip, for the data parameters of storage program and described main control chip communication process.
Further, described device also comprises: monitoring chip, is connected with described main control chip, for monitoring the working condition of described main control chip.
Further, described device also comprises: interface chip, be connected with described main control chip, and described main control chip is for communicating by described interface chip and host computer.
The radar velocity measurement device based on angle compensation that the utility model embodiment provides, by increase obliquity sensor in described radar velocity measurement device, and the speed of the angle modification object recording according to described obliquity sensor, compare with traditional radar velocity measurement device, improved the accuracy of velocity survey.
Accompanying drawing explanation
Fig. 1 is the schematic diagram that tests the speed of radar velocity measurement device in prior art;
Fig. 2 is the schematic diagram of the radar velocity measurement device based on angle compensation that provides of the utility model embodiment;
Fig. 3 is a preferred schematic diagram of the radar velocity measurement device based on angle compensation that provides of the utility model embodiment;
Fig. 4 is the workflow diagram of main control chip in the radar velocity measurement device based on angle compensation that provides of the utility model embodiment;
Fig. 5 is the schematic diagram of obliquity sensor in the radar velocity measurement device based on angle compensation that provides of the utility model embodiment;
Fig. 6 be in the radar velocity measurement device based on angle compensation that provides of the utility model embodiment object at the schematic diagram in non-horizontal section;
Embodiment
Below in conjunction with drawings and Examples, the utility model is described in further detail.Be understandable that, specific embodiment described herein is only for explaining the utility model, but not to restriction of the present utility model.It also should be noted that, for convenience of description, in accompanying drawing, only show the part relevant to the utility model but not full content.
The radar velocity measurement device based on angle compensation that the utility model embodiment provides can be applicable to test the speed in the traffic intelligent management systems such as bayonet socket management, overspeed snapping system and mobile electronic policeman.
Fig. 2 shows the schematic diagram of the radar velocity measurement device based on angle compensation that the utility model embodiment provides, and as shown in Figure 2, described device comprises: antenna 1, microstrip circuit receive-transmit system 2, main control chip 3, obliquity sensor 4 and analog-to-digital conversion module 5.Wherein, described antenna 1 is for transmitting to object, and receives the reflected signal of described object, and the object in the present embodiment can be vehicle, can be also other object movably; Described microstrip circuit receive-transmit system 2 is connected with described antenna 1, for by the transmitting and receive signal mixing of described antenna 1, and mixed frequency signal is sent to described analog-to-digital conversion module 5; Described analog-to-digital conversion module 5 is connected with described main control chip 3 with described microstrip circuit receive-transmit system 2, for described mixed frequency signal is converted to digital signal, sends to described main control chip 3; Described obliquity sensor 4 is connected with described main control chip 3, for measuring described radar velocity measurement device angle of inclination with respect to the horizontal plane, and the angle of inclination measuring is sent to described main control chip 3; The actual speed that described object is exported at the digital signal that described main control chip 3 receives for basis and described angle of inclination.
In the present embodiment, described radar velocity measurement device is realized according to Doppler's principle, and described antenna 1 sends the microwave signal of fixed frequency, then receives the microwave signal being reflected by object.If occur that moving target thing has speed with respect to the direction of antenna transmission signal in described antenna 1 launching beam, the microwave signal of transmitting and the microwave signal of reflection there will be difference on the frequency, be called Doppler shift, this frequency displacement and mobile object speed have corresponding relation, and the processing that can regain ripple by docking calculates described object along the speed of antenna transmission sense.Therefore,, in the present embodiment, described main control chip 3 can obtain described object along the transmit speed of direction of described antenna 1 according to the digital signal receiving from described analog-to-digital conversion module 5.
In actual bayonet socket application, radar velocity measurement device is generally arranged on eminence, for example, as shown in Figure 1, radar velocity measurement device is arranged on the top in track, it is vehicle along radar velocity measurement device the transmit speed of direction, i.e. measuring speed, the not actual speed of vehicle that existing radar velocity measurement device is measured what come.In the utility model embodiment, in described radar velocity measurement device, increased obliquity sensor 4, described obliquity sensor 4 can record the angle of described radar velocity measurement device and horizontal direction directly and accurately, described angle is the setting angle of velocity radar device, described vehicle equals described setting angle along the transmit speed of direction and the angle of vehicle actual speed of radar velocity measurement device, described radar velocity measurement device can be revised described measuring speed according to described setting angle, obtains the actual speed of vehicle.
Those skilled in the art will appreciate that described speed measuring device also comprises power management module, for by outer power voltage, as 12V, be converted to the required operating voltage of modules in described speed measuring device.
The radar velocity measurement device based on angle compensation that the utility model embodiment provides, by increase obliquity sensor in described radar velocity measurement device, and the speed of the angle modification object recording according to described obliquity sensor, compare with traditional radar velocity measurement device, improved the accuracy of velocity survey.
In above-described embodiment, described main control chip 3 can be DSP (Digital Signal Processor, digital signal processor), can be also the chip of STM32 series, at this, does not do concrete restriction.As shown in Figure 3, described main control chip 3 can comprise: data processing unit 31 and angle modification unit 32.Wherein, described data processing unit 31 is for obtaining described object along the speed of described antenna transmission sense according to the digital signal that receives, and the processing procedure of described processing unit 31 can comprise that the digital signal to receiving carries out the processing such as packet parsing, filtering, Fourier transform, anti-interference process, target identification; The speed of described angle modification unit 32 for getting according to described angle of inclination and described data processing unit, exports the actual speed of described object.Fig. 4 shows the workflow diagram of described main control chip, as shown in Figure 4, described main control chip receives after the digital signal of described analog-to-digital conversion module 5 transmissions, carry out obtaining object along the speed of antenna transmission sense after packet parsing, filtering, Fourier transform, anti-interference process and target identification processing, then the described speed along antenna transmission sense is carried out to angle modification, obtain the actual speed of described object.
In above-described embodiment, described obliquity sensor, can adopt twin shaft to measure, and also can adopt single shaft to measure, and in actual applications, described obliquity sensor can be used separately, also can be integrated in described main control chip and use.Fig. 5 shows in the utility model embodiment and adopts twin shaft measuring method to measure the schematic diagram at inclination angle, as shown in Figure 5, supposes that the X-axis of described radar velocity measurement device and Y-axis are shown in Fig. 5, and the ideal value of acceleration of gravity is 1g.When the angle of described radar velocity measurement device and surface level is θ, acceleration of gravity is Ax at the component of X-direction, and Ax=1g*sin (θ), acceleration of gravity is Ay at the component of Y direction, and Ay=1g*cos (θ), the ratio of the component of acceleration of gravity in X-axis and Y-axis is as shown in Equation 1:
From formula 1, angle
In above-described embodiment, described obliquity sensor can directly get the angle of described radar velocity measurement device and surface level, and by serial line interface, the angle getting is imported in described main control chip, by described main control chip, carried out the correction of speed, for example, suppose that to process the vehicle that obtains be V1 along the speed of antenna transmission sense according to receiving mixed frequency signal for main control chip 3, then the angle theta recording according to described obliquity sensor 4 can obtain the actual speed V2=V1/cos θ of vehicle.And existing radar velocity measurement device needs the angle of manual measurement speed measuring device and surface level, and angle value is manually inputted to radar velocity measurement device.Compare with existing radar velocity measurement device, the radar velocity measurement device that the utility model embodiment provides has been simplified engineering operating process, has saved the time of debugging radar velocity measurement device setting angle in engineering simultaneously.
In above-described embodiment, described device also can comprise: pretreatment unit 6, as shown in Figure 3, described pretreatment unit 6 is connected with described analog-to-digital conversion module 5 with described microstrip circuit receive-transmit system 2, for described mixed frequency signal is amplified, filtering, and amplification, filtered signal are sent to described analog-to-digital conversion module.
In above-described embodiment, described device also comprises: clock source 7, as shown in Figure 3, described clock source 7 is connected with described main control chip 3, for the clock signal of described main control chip 3 work is provided.
In above-described embodiment, described device also comprises: external memory storage 8, as shown in Figure 3, described external memory storage 8 is connected with described main control chip 3, for the data parameters of storage program and described main control chip 3 communication processs.
In above-described embodiment, described device also comprises: monitoring chip 9, as shown in Figure 3, described monitoring chip 9 is connected with described main control chip 3, for monitoring the working condition of described main control chip 3, for example monitor whether normal operation of described main control chip, if main control chip operation irregularity, autoboot main control chip.
In above-described embodiment, described device also comprises: interface chip 10, as shown in Figure 3, described interface chip 10 is connected with described main control chip 3, described main control chip 3 is for communicating with host computer by described interface chip 10, for example, described main control chip carries out the setting of data parameters, described main control chip to described host computer transmission speed result etc. according to the instruction of described host computer.
When described radar velocity measurement application of installation arrives non-horizontal section, can first adopt gradiometer to measure the inclination angle on road surface, then described inclination angle is input to described radar velocity measurement device, carry out angle modification.As shown in Figure 6, the section at object place is not horizontal section to example, and the setting angle of radar velocity measurement device is θ, and object is V in the transmit speed of direction of radar velocity measurement device
survey.The angle that adopts gradiometer side to obtain described object and horizontal section is λ, and described velocity radar device can obtain the actual speed V=V of object according to this angle
survey/ cos (θ-λ).
The foregoing is only preferred embodiment of the present utility model, be not limited to the utility model, to those skilled in the art, the utility model can have various changes and variation.All any modifications of doing, be equal to replacement, improvement etc., within all should being included in protection domain of the present utility model within spirit of the present utility model and principle.
Claims (9)
1. the radar velocity measurement device based on angle compensation, is characterized in that, comprising: antenna, microstrip circuit receive-transmit system, analog-to-digital conversion module, main control chip and obliquity sensor,
Described antenna is used for transmitting to object, and receives the reflected signal of described object;
Described microstrip circuit receive-transmit system is connected with described antenna, for by the transmitting and receive signal mixing of described antenna, and mixed frequency signal is sent to described analog-to-digital conversion module;
Described analog-to-digital conversion module is connected with described main control chip with described microstrip circuit receive-transmit system, for described mixed frequency signal is converted to digital signal, sends to described main control chip;
Described obliquity sensor is connected with described main control chip, for measuring described radar velocity measurement device angle of inclination with respect to the horizontal plane, and the angle of inclination measuring is sent to described main control chip;
Described main control chip is connected with described obliquity sensor with described analog-to-digital conversion module, the actual speed that described object is exported at the digital signal receiving for basis and described angle of inclination.
2. the radar velocity measurement device based on angle compensation according to claim 1, is characterized in that, described main control chip is the chip of digital signal processor DSP or STM32 series.
3. the radar velocity measurement device based on angle compensation according to claim 1 and 2, is characterized in that, described main control chip comprises: data processing unit and angle modification unit;
Described data processing unit is for obtaining described object along the speed of described antenna transmission sense according to the digital signal receiving;
Described angle modification unit is connected with described data processing unit, for the speed getting according to described angle of inclination and described data processing unit, exports the actual speed of described object.
4. the radar velocity measurement device based on angle compensation according to claim 1, is characterized in that, described obliquity sensor adopts twin shaft to measure.
5. the radar velocity measurement device based on angle compensation according to claim 1, it is characterized in that, described device also comprises: pretreatment unit, be connected with described analog-to-digital conversion module with described microstrip circuit receive-transmit system, described pretreatment unit for described mixed frequency signal is amplified, filtering, and amplification, filtered signal are sent to described analog-to-digital conversion module.
6. the radar velocity measurement device based on angle compensation according to claim 1, is characterized in that, described device also comprises: clock source, is connected with described main control chip, for the clock signal of described main control chip work is provided.
7. the radar velocity measurement device based on angle compensation according to claim 1, is characterized in that, described device also comprises: external memory storage, is connected with described main control chip, for the data parameters of storage program and described main control chip communication process.
8. the radar velocity measurement device based on angle compensation according to claim 1, is characterized in that, described device also comprises: monitoring chip, is connected with described main control chip, for monitoring the working condition of described main control chip.
9. the radar velocity measurement device based on angle compensation according to claim 1, is characterized in that, described device also comprises: interface chip, be connected with described main control chip, and described main control chip is for communicating by described interface chip and host computer.
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| CN201420134293.8U CN203825191U (en) | 2014-03-24 | 2014-03-24 | Radar velocity measurement apparatus based on angle compensation |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103885056A (en) * | 2014-03-24 | 2014-06-25 | 北京川速微波科技有限公司 | Radar speed measuring device and method based on angle compensation |
| CN106066476A (en) * | 2015-04-20 | 2016-11-02 | 株式会社京三制作所 | Train status detection device and train status detection method |
-
2014
- 2014-03-24 CN CN201420134293.8U patent/CN203825191U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103885056A (en) * | 2014-03-24 | 2014-06-25 | 北京川速微波科技有限公司 | Radar speed measuring device and method based on angle compensation |
| CN106066476A (en) * | 2015-04-20 | 2016-11-02 | 株式会社京三制作所 | Train status detection device and train status detection method |
| CN106066476B (en) * | 2015-04-20 | 2021-06-04 | 株式会社京三制作所 | Train state detection device and train state detection method |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140910 |