CN205484786U - Double antenna radar speed -measuring sensing module - Google Patents
Double antenna radar speed -measuring sensing module Download PDFInfo
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- CN205484786U CN205484786U CN201520706472.9U CN201520706472U CN205484786U CN 205484786 U CN205484786 U CN 205484786U CN 201520706472 U CN201520706472 U CN 201520706472U CN 205484786 U CN205484786 U CN 205484786U
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Abstract
The utility model discloses a double antenna radar speed -measuring sensing module, including radar microwave unit, signal processing unit and data output unit, radar microwave unit adopts two radar microwave modules of syntropy angular to measure, and differential seat angle between two modules is fixed to be 15. This design utilizes the relevant algorithm of doppler effect to calculate speed through the error of structure and the effectual reduction speed measurement of algorithm, utilizes the fixed differential seat angle between two modules to carry out compensation calculation, has reduced the measuring error that the train caused because of vibrations, turn etc. At the operation in -process, two radar microwave module alone operation, microwave module became invalid, but another one microwave module independent operation can effectively guarantee the stability of system, two microwave module syntropys transmission design, radar wave launch angle is poor little, can guarantee that two microwave detection's ground topography is unanimous with the environment, avoids because of the difference of topography or the error that causes two microwave detection results of environmental factor on every side.
Description
Technical field
This utility model relates to a kind of sensing module, specifically a kind of double antenna radar velocity measurement sensing module.
Background technology
At present, to disclose a kind of radar velocity measurement sensor double antenna asymmetric for the file of Patent No. CN201220562763.1
Launching the technology that angle is used, the radar velocity measurement being made up of radar microwave unit, signal processing unit and data outputting unit passes
Sensor system, uses double antenna asymmetric transmitting angle mounting technique in radar velocity measurement sensor, and the antenna of double antenna is launched
Angle (with horizontal plane angle) is the front angle of departure 40 degree, and the rear angle of departure 50 degree differs 10 with backward launched angle the most forward
Degree, the reflected signal received and local oscillation signal are produced Doppler signal, by signal processing by radar microwave unit after mixed
Doppler signal is analyzed and processed by unit in real time, utilizes the frequency spectrum deviation at 10 degree of angles, isolates out and do not meet normal speed
Spectrum peak, thus obtain speed data accurately, then exported by data outputting unit.
(1) launch design before and after this technology uses double antenna, be not easy to distinguishing of velocity attitude；
(2) launch design before and after using double antenna, can cause because two microwave sounding targets are zones of different object or landform
Difference causes the difference of two test data, causes error, it is impossible to reach high accuracy；
(3) design launched before and after, is installing microwave module it needs to be determined that the angle of departure of front and back microwave module, before and after radar
It is high that design and installation debugging difficulty is launched in the design launched more in the same direction；Space used is relatively big, and installation site need to ensure two-way radar wave
All can completely launch, not be blocked.
Utility model content
The purpose of this utility model is to provide a kind of double antenna radar velocity measurement sensing module the most at an angle to each other, on solving
State the problem proposed in background technology.
For achieving the above object, the following technical scheme of this utility model offer:
A kind of double antenna radar velocity measurement sensing module, including radar microwave unit, signal processing unit and data outputting unit,
Radar microwave unit uses dual radars microwave module the most at an angle to each other to carry out the angle compensation of tachometric survey, two modules it
Between differential seat angle be 15 °.
As further program of the utility model: described signal processing unit uses digital signal processor.
As further program of the utility model: said two radar micro-wave module respectively constitutes different transmittings from ground
Angle, launches radar wave with different frequencies, receives, according to energy and spectrum signature, the radar wave oneself launched and runs into ground generation
Echo, by after its respectively digital processing send into digital signal processor carry out velocity calculated.
As this utility model further scheme: described dual radars microwave module uses two set independent transmission and receives microwave
Module, two set of modules tranmitting frequencies meet 24.125GHz ± 0.05GHz, but tranmitting frequency differs.
Compared with prior art, the beneficial effects of the utility model are: 1, radar microwave unit uses the most at an angle to each other
Dual radars microwave module measures, and utilizes Doppler effect related algorithm to calculate speed, utilizes the fixed angles between two modules
Degree difference compensates calculating, decreases the measurement error that train causes in running because of vibrations, turning etc.；2, double thunders
Reaching microwave module independent operating, one of them microwave module lost efficacy, and another one microwave module can isolated operation, it is ensured that system
Stability；3, two microwave modules launch design in the same direction, and emitting radar waves differential seat angle is little, can guarantee that two microwaves are visited
The ground surface or terrain surveyed is consistent with environment, it is to avoid because two microwave sounding results are caused by the difference of landform or ambient environmental factors
Error, improves the accuracy of tachometric survey during using；4, the angle during the angle of departure is easy to radar module installation process in the same direction
Degree debugging, saves installing space, and meanwhile, the convenient selection of installation site ON TRAINS, as long as can guarantee that a direction
Radar wave is not blocked；5, the design of dual radars microwave module, precisely distinguishes the travel direction of train；6, acceleration detection sets
Meter and train acceleration, deceleration, emergency brake signal Feedback Design, can accurately calculate the accekeration of train, be conducive to
The acceleration of control train, in the range of human body accepts, improves the comfortableness of passenger, and utilize acceleration to judge rule is come simultaneously
The accuracy of the real-time speed that calibrating radar records, improves the accuracy rate of system, is fed back by acceleration, deceleration and brake signal and sets
Meter, it is determined that the situation that tests the speed and the goodness of fit of train operation instruction, improves the reliability of whole velocity-measuring system；7, single-chip mould
Formula, improves the reliability of system, stability.
Accompanying drawing explanation
Fig. 1 is double antenna radar velocity measurement sensing module module placement figure under normal circumstances；
Fig. 2 be double antenna radar velocity measurement sensing module with ground module placement figure time not parallel；
Detailed description of the invention
Below in conjunction with the accompanying drawing in this utility model embodiment, the technical scheme in this utility model embodiment is carried out clearly
Chu, it is fully described by, it is clear that described embodiment is a part of embodiment of the present utility model rather than whole
Embodiment.Based on the embodiment in this utility model, those of ordinary skill in the art are not under making creative work premise
The every other embodiment obtained, broadly falls into the scope of this utility model protection.
Referring to Fig. 1～2, in this utility model embodiment, a kind of double antenna radar velocity measurement sensing module, including radar microwave
Unit, signal processing unit and data outputting unit, radar microwave unit uses dual radars microwave module the most at an angle to each other
Carry out the angle compensation of tachometric survey.Differential seat angle between two modules is 15 °.
Signal processing unit uses digital signal processor.
Two radar micro-wave modules respectively constitute the different angles of departure from ground, launch radar wave with different frequencies, according to energy
Amount and spectrum signature receive the radar wave oneself launched and run into the echo that ground produces, and send into number after being distinguished digital processing
Word signal processor carries out velocity calculated.
Dual radars microwave module uses two set independent transmission and receives microwave module, and two set of modules tranmitting frequencies meet
24.125GHz ± 0.05GHz, but tranmitting frequency differs.
Originally > utility model uses dual radars microwave module the most at an angle to each other to carry out the angle compensation of tachometric survey, such as Fig. 1
Wherein α initial value is 30 °, and β initial value is 45 °, and the differential seat angle between two modules is 15 °, if train in Yun Hanging
Occur jolting or fierce vibrations, cause the transmitted wave of radar micro-wave module to change with the angle α on ground and β, as schemed
2, become α respectively1And β1, but they still meet β1-α1=15 °, two microwave module angles design in the same direction and can ensure that
The differential seat angle of α and β is certain, it is ensured that the concordance in emitting radar waves direction, it is to avoid jolts and fiercely vibrates the impact brought,
The accuracy of tachometric survey during being conducive to sensor actual installation and using.
Owing to two radar micro-wave modules respectively constitute the different angles of departure from ground, launch radar wave, root with different frequencies
Receive, according to energy and spectrum signature, the radar wave oneself launched and run into the echo that ground produces, after it being processed respectively, input number
Word signal processor carries out velocity calculated, therefore, utilizes Doppler effect related algorithm to calculate the test speed of two radars respectively
Degree, recycles the fixed angle difference between two modules and compensates calculating, and the design of such Dual module just can reduce train top
Winnow with a dustpan the measurement error brought, it is ensured that the accuracy of velocity amplitude.
Meanwhile, dual radars microwave module is designed with two microwave module isolated operations, from the standpoint of through engineering approaches Redundancy Design,
When one of them microwave module breaks down and cannot normally work, another one can also be implemented separately the merit that tests the speed of system
Can, thus it is greatly improved system reliability.
Additionally, Microwave emission design in the same direction, it is ensured that the concordance in emitting radar waves direction, only need to ensure radar during installation
Launch direction be not blocked, beneficially sensor actual installation convenience and guarantee two microwave soundings ground surface or terrain
It is consistent with environment, it is ensured that the accuracy of tachometric survey during use, it is to avoid because the difference of landform or ambient environmental factors are to two
The error that individual microwave sounding result causes.
The design of train operation acceleration detection and train acceleration, deceleration, emergency brake signal Feedback Design.
Tachymeter is by being calculated acceleration to the speed in standard continuous time, it is generally the case that acceleration should
Reach peak acceleration when driving moment reaches maximum static friction force, on rail this acceleration typically not over
1m/s2.In the case of brake and brake hard, acceleration can become bigger, therefore increases brake and merit is fed back in brake hard
Acceleration in such cases can be allowed in bigger than normal.
Meanwhile, utilize acceleration rule to examine and determine the accuracy rate of real time speed measuring.The speed that two radar micro-wave module output is close
Then represent that it is believable for currently testing the speed, when the velocity contrast that velocity amplitude generation saltus step and two radar surveyings obtain is bigger,
Obtain the speed currently meeting rule according to acceleration decision rule, and the credibility of speed is provided.
Increase the feedback signal accelerated, slow down and brake mutual.Tachymeter can analyze the speed queue recorded continuously, it is judged that
The reasonability of each speed, should meet vehicle must at the uniform velocity, the requirement of acceleration or deceleration command operating.
In a communications system, in most cases the process capacity of demand is relatively big and requirement in multiple digital signal processor parallel processings
Interface flexible, between multiple digital signal processors and and other devices between interface coordination process be particularly important.
Coordination between multiple digital signal processors must is fulfilled for two conditions: first, the bandwidth of memorizer allow for meeting by
Raising in the data throughout that bus number increase brings；Second, dispatching algorithm that multiple functional units relate to and complexity thereof
Degree must be attainable and be suitable to application.
The design uses high-performance processor TMS320C6748 single-chip to process design, can fully meet high energy efficiency, connectedness
Design is to high integration peripheral hardware, dissipation more low in calories and the demand of longer battery.Avoid at multiple digital signal
The disadvantage that reason device parallel processing brings.
The direction of motion distinguishes when applying with testing the speed, and arranges working sensor and uses band logical in CW pattern, back end signal conditioning
Wave filter, at this moment uses dual pathways mode of operation.
When target is done near the radial motion of sensor, I signal lags behind Q signal 90 °；When target is done away from sensor
Radial motion time, I signal is ahead of Q signal 90 °.It is analyzed IF1 and IF2 signal in rear end processing simultaneously,
Then can obtain the directional information of moving target.
To should be two-way amplitude identical for I, Q in theory, the signal that phase is 90 °, but the error caused due to reality measurement,
Its amplitude can have the error of 6dB, and phase contrast allows also to change in the range of 60 °～120 °.
Claims (4)
1. a double antenna radar velocity measurement sensing module, including radar microwave unit, signal processing unit and data outputting unit,
It is characterized in that, described radar microwave unit uses dual radars microwave module the most at an angle to each other to carry out the angle of tachometric survey
Compensating, the differential seat angle between two modules is 15 °.
Double antenna radar velocity measurement sensing module the most according to claim 1, it is characterised in that described signal processing unit
Use digital signal processor.
Double antenna radar velocity measurement sensing module the most according to claim 1, it is characterised in that said two radar microwave
Module respectively constitutes the different angles of departure from ground, launches radar wave with different frequencies, receives according to energy and spectrum signature
The radar wave oneself launched runs into the echo that ground produces, and carries out sending into digital signal processor after its respectively digital processing
Velocity calculated.
Double antenna radar velocity measurement sensing module the most according to claim 1, it is characterised in that described dual radars microwave mode
Block uses two set independent transmission and receives microwave module, and two set of modules tranmitting frequencies meet 24.125GHz ± 0.05GHz, but
Tranmitting frequency differs.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520706472.9U CN205484786U (en) | 2015-09-14 | 2015-09-14 | Double antenna radar speed -measuring sensing module |
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| CN201520706472.9U CN205484786U (en) | 2015-09-14 | 2015-09-14 | Double antenna radar speed -measuring sensing module |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106324590A (en) * | 2016-09-12 | 2017-01-11 | 长沙普德利生科技有限公司 | Method and device of improving measuring precision of train velocity measuring system |
| CN108663676A (en) * | 2018-07-25 | 2018-10-16 | 中联天通科技（北京）有限公司 | Millimeter speed-measuring radar system in a kind of navigation of novel compositions |
| CN113511236A (en) * | 2021-08-11 | 2021-10-19 | 上海无线电设备研究所 | High-precision sensing equipment and sensing method for motion state of rail transit train |
| CN110275170B (en) * | 2018-03-15 | 2021-12-03 | 郑州宇通客车股份有限公司 | Radar detection control method for vehicle and vehicle |
| CN113850999A (en) * | 2021-09-03 | 2021-12-28 | 杭州海康威视数字技术股份有限公司 | Parking space detection device and camera device with radar for monitoring parking space |
| CN113904721A (en) * | 2021-10-19 | 2022-01-07 | 中国电子科技集团公司第五十四研究所 | Microwave-assisted wireless optical link acquisition tracking alignment system and method |
| CN114730011A (en) * | 2020-11-06 | 2022-07-08 | 深圳市大疆创新科技有限公司 | Hovering method of aircraft, aircraft and storage medium |
-
2015
- 2015-09-14 CN CN201520706472.9U patent/CN205484786U/en active Active
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106324590A (en) * | 2016-09-12 | 2017-01-11 | 长沙普德利生科技有限公司 | Method and device of improving measuring precision of train velocity measuring system |
| CN110275170B (en) * | 2018-03-15 | 2021-12-03 | 郑州宇通客车股份有限公司 | Radar detection control method for vehicle and vehicle |
| CN108663676A (en) * | 2018-07-25 | 2018-10-16 | 中联天通科技（北京）有限公司 | Millimeter speed-measuring radar system in a kind of navigation of novel compositions |
| CN114730011A (en) * | 2020-11-06 | 2022-07-08 | 深圳市大疆创新科技有限公司 | Hovering method of aircraft, aircraft and storage medium |
| CN113511236A (en) * | 2021-08-11 | 2021-10-19 | 上海无线电设备研究所 | High-precision sensing equipment and sensing method for motion state of rail transit train |
| CN113511236B (en) * | 2021-08-11 | 2023-02-28 | 上海无线电设备研究所 | High-precision sensing equipment and sensing method for motion state of rail transit train |
| CN113850999A (en) * | 2021-09-03 | 2021-12-28 | 杭州海康威视数字技术股份有限公司 | Parking space detection device and camera device with radar for monitoring parking space |
| CN113850999B (en) * | 2021-09-03 | 2022-11-25 | 杭州海康威视数字技术股份有限公司 | Parking space detection device and camera device with radar for monitoring parking space |
| CN113904721A (en) * | 2021-10-19 | 2022-01-07 | 中国电子科技集团公司第五十四研究所 | Microwave-assisted wireless optical link acquisition tracking alignment system and method |
| CN113904721B (en) * | 2021-10-19 | 2022-11-11 | 中国电子科技集团公司第五十四研究所 | Microwave-assisted wireless optical link acquisition tracking alignment system and method |
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