CN111007470A - Self-checking method based on traffic speed measuring radar and traffic speed measuring radar - Google Patents
Self-checking method based on traffic speed measuring radar and traffic speed measuring radar Download PDFInfo
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- CN111007470A CN111007470A CN201911368975.9A CN201911368975A CN111007470A CN 111007470 A CN111007470 A CN 111007470A CN 201911368975 A CN201911368975 A CN 201911368975A CN 111007470 A CN111007470 A CN 111007470A
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- 238000013500 data storage Methods 0.000 claims abstract description 10
- 230000009191 jumping Effects 0.000 claims abstract description 4
- 238000012795 verification Methods 0.000 claims description 6
- 230000001915 proofreading effect Effects 0.000 claims description 5
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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
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
- G01S7/40—Means for monitoring or calibrating
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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
- G01S13/50—Systems of measurement based on relative movement of target
- G01S13/58—Velocity or trajectory determination systems; Sense-of-movement determination systems
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Abstract
The invention discloses a traffic speed measuring radar-based self-checking method and a traffic speed measuring radar, wherein the method comprises the following steps: step S1: when the target non-output time of the speed measuring radar reaches a set threshold value of the upper computer, triggering a self-checking function to work; step S2: judging whether echo data exist or not in the detection process of the speed measuring radar, if so, determining that the radar normally works, and jumping out of self-detection; if no echo data exists, the counter performs counting superposition, and when the counting accumulated value does not reach a set value, the counting value is kept and the next self-checking work is continued; when the count accumulated value reaches a set value, starting the next step of self-checking; step S3: checking the data storage condition; reading the stored data into a signal processing flow, and comparing the stored data with a preset result; and judging the state of the traffic speed measuring radar according to the comparison result. The traffic speed measuring radar is provided with a self-checking unit. The invention has the advantages of simple principle, easy realization, self-checking and the like.
Description
Technical Field
The invention mainly relates to the technical field of traffic speed measurement, in particular to a self-checking method based on a traffic speed measuring radar and the traffic speed measuring radar.
Background
With the increasing amount of private car keeping, traffic enforcement faces a huge challenge. The traffic speed measuring radar is used as a speed measuring device, can quickly and accurately detect the instantaneous speed of a vehicle, uploads related information to a camera for snapshot evidence collection, and the snapshot evidence collection is shown in fig. 1 and 2. The traffic speed measuring radar is generally arranged on a portal frame with a certain height away from the ground to monitor the running speed of a single-lane or multi-lane vehicle. The radar installation and inspection work is inconvenient, and whether the radar works normally or not can not be observed at any time. If the radar stops working, once a chapter violation occurs, the snapshot evidence taking can not be smoothly carried out, and the justice and authority of the traffic law enforcement are seriously challenged. If the radar stops working, the radar needs to be manually put on a shelf for inspection and maintenance, so that the workload of workers is increased, and the working efficiency is reduced.
In the working scenario of this conventional approach, there are generally two conventional schemes:
the other is that before the radar works, test and measurement equipment such as a frequency spectrograph and an oscilloscope is adopted for checking, and after the radar is installed, the working state of the radar cannot be checked effectively in real time, so that the radar is not beneficial to traffic law enforcement. Namely, the initial working state of the radar can only be ensured to be normal, and the condition that the radar stops working suddenly in the working process cannot be effectively detected.
Another is to integrate other processing devices on the radar circuit board, by which it is checked whether the radar is working properly. The method not only additionally increases the cost of raw materials, but also needs to manually control and start the self-checking module to work, namely, the self-checking module can not perform self-checking at any time and can only perform self-checking on the working state of the radar at the current moment, so the method has no general usability, can not check the working state of the radar at any time in the working process of the radar, and has limited self-checking effect.
In addition, practitioners propose to perform self-checking through an external means, but only hardware circuit faults can be determined, and faults of the signal processing algorithm module cannot be determined, so that the radar error reasons cannot be comprehensively checked, and the workload of subsequent checking is increased.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: aiming at the technical problems in the prior art, the invention provides the traffic speed measuring radar-based self-checking method and the traffic speed measuring radar, which have the advantages of simple principle, easy realization and self-checking.
In order to solve the technical problems, the invention adopts the following technical scheme:
a self-checking method based on traffic speed measuring radar comprises the following steps:
step S1: when the target non-output time of the speed measuring radar reaches a set threshold value of the upper computer, triggering a self-checking function to work;
step S2: judging whether echo data exist or not in the detection process of the speed measuring radar, if so, determining that the radar normally works, and jumping out of self-detection; if no echo data exists, the counter performs counting superposition, and when the counting accumulated value does not reach a set value, the counting value is kept and the next self-checking work is continued; when the count accumulated value reaches the set value, starting the next self-checking, and entering the step S3;
step S3: checking the data storage condition; reading the stored data into a signal processing flow, and comparing the stored data with a preset result; and judging the state of the traffic speed measuring radar according to the comparison result.
As a further improvement of the process of the invention: in step S3, if the comparison result is not consistent, it is determined that the traffic speed radar signal processing algorithm is faulty, and if the comparison result is consistent, it is determined that the traffic speed radar signal processing algorithm is faulty.
As a further improvement of the process of the invention: in step S3, if the comparison result is not consistent, a reset signal is sent, and the hardware error information is reported to the control center, and the traffic speed measuring radar is restarted.
As a further improvement of the process of the invention: in step S3, if the comparison result is consistent, the traffic speed measuring radar is also restarted to keep the state.
The invention further provides a traffic speed measuring radar, which is provided with a self-checking unit, wherein the self-checking unit comprises:
the self-checking counting module is used for counting the traffic speed measuring radar when no echo data exists in the detection process of the traffic speed measuring radar; when the accumulated value does not reach the set value, keeping the counter value and continuing to perform the next self-checking work; when the accumulated value reaches a set value, starting a proofreading data comparison module;
the checking data storage module is used for storing the detection data of the traffic speed measuring radar as a comparison basis;
the verification data comparison module is used for comparing the detection data in the verification data storage module with a preset result after being started; and judging the state of the traffic speed measuring radar according to the comparison result.
As a further improvement of the invention: and when the comparison result of the comparison module of the check data is inconsistent, judging that the traffic speed measuring radar signal processing algorithm is wrong, and if the comparison result is consistent, judging that the traffic speed measuring radar signal processing algorithm is correct.
As a further improvement of the invention: if the comparison result is inconsistent, a reset signal is sent, the proofreading data comparison module reports hardware error information to the control center, and meanwhile, the traffic speed measuring radar is restarted.
As a further improvement of the invention: if the comparison result is inconsistent, a reset signal is sent, the proofreading data comparison module reports hardware error information to the control center, and meanwhile, the traffic speed measuring radar is restarted.
As a further improvement of the invention: if the comparison result is consistent, the comparison data is reported to the control center by the comparison module, and the traffic speed measuring radar is restarted to keep the state.
Compared with the prior art, the invention has the advantages that:
the traffic speed measuring radar-based self-checking method and the traffic speed measuring radar have the advantages of simple principle, easy realization, realization in a signal processing algorithm, realization of a self-checking function at any time and any place, report of a self-checking result and restart of the radar. Therefore, the method and the device have the advantages that the algorithm self-checking flow is added, the self-checking functional module is triggered to work in the set self-checking period, and whether the radar works normally or not is accurately checked in real time. If the radar stops working, the error information is judged according to the self-checking output information, the error information is uploaded to the control center, and a worker can determine the error reason according to the uploaded error information at the remote control center to maintain or replace the radar in time. The invention does not need human intervention and inspection, reduces the workload of workers, improves the working efficiency and simultaneously ensures the smooth development of traffic law enforcement.
Drawings
Fig. 1 is a schematic side view of a conventional traffic speed measuring radar working scene.
Fig. 2 is a schematic top view of a conventional traffic speed measuring radar working scene.
FIG. 3 is a schematic flow diagram of the method of the present invention.
Fig. 4 is a schematic diagram of the operation flow of the speed radar in the embodiment of the present invention.
Detailed Description
The invention will be described in further detail below with reference to the drawings and specific examples.
As shown in fig. 3, the self-checking method based on the traffic speed measuring radar of the present invention mainly includes two self-checking steps, wherein the two self-checks work cooperatively, and it is determined that the radar stops working together, so as to ensure the accuracy of the self-checking; it includes:
step S1: when the target non-output time of the radar reaches a set threshold value of the upper computer, triggering a self-checking function to work;
step S2: in the CFAR detection, judging whether echo data exist or not, if so, determining that the radar normally works, outputting target information normally, jumping out of the self-detection, and terminating the self-detection work; if no echo data exists, the counter counts and adds 1, when the accumulated value of the counter does not reach the set value of the upper computer, the value of the counter is reserved, and the next self-checking work is continued; when the accumulated value of the counter reaches the set value of the upper computer, starting the next self-checking, and entering the step S3;
step S3: checking the data storage condition; reading the stored data into a signal processing flow, and comparing the data with a preset result after a series of signal processing; if the comparison result is inconsistent, the radar signal processing algorithm can be judged to be in error, the algorithm error information is reported to the control center, and the radar is restarted; if the comparison result is consistent, a reset signal is sent, hardware error information is reported to the control center, and the radar is restarted.
Fig. 4 is a schematic flow chart of the present invention in a specific application. The traffic speed measuring radar has the following working procedures: the traffic speed measuring radar transmits triangular linear Frequency Modulation Continuous Waves (FMCW), receives echo signals, performs analog-to-digital (AD) conversion on the echo signals, and then performs Fast Fourier Transform (FFT). Then, by performing constant false scene detection (CFAR) on the FFT data, velocity and distance information of the target can be obtained.
In this process, the target point detected by the CFAR may include a false target point, and real target detection information may be obtained through target filtering. The target detection value is tracked and filtered, so that the influence caused by single detection error can be reduced, and more real target information can be obtained.
The method of the invention is realized in a signal processing algorithm, does not relate to hardware change or human intervention, can realize the self-checking function at any time and any place, and reports the self-checking result and the radar is restarted. Therefore, the self-checking method and the self-checking system have the advantages that by adding the algorithm self-checking flow, no additional hardware processing device is needed, the self-checking functional module is triggered to work in the set self-checking period, and whether the radar works normally or not is accurately checked in real time. If the radar stops working, the error information is judged according to the self-checking output information, the error information is uploaded to the control center, and a worker can determine the error reason according to the uploaded error information at the remote control center to maintain or replace the radar in time. The invention does not need human intervention and inspection, reduces the workload of workers, improves the working efficiency and simultaneously ensures the smooth development of traffic law enforcement.
The invention further provides a traffic speed measuring radar, which is provided with a self-checking unit, wherein the self-checking unit comprises:
the self-checking counting module is used for counting the echo data when the echo data does not exist in the CFAR detection of the traffic speed measuring radar; when the accumulated value does not reach the set value of the upper computer, the counter value is reserved, and the next self-checking work is continued; when the accumulated value reaches the set value of the upper computer, starting a proofreading data comparison module;
the checking data storage module is used for storing the detection data of the traffic speed measuring radar as a comparison basis;
the verification data comparison module is used for comparing the detection data in the verification data storage module with a preset result after being started; if the comparison result is inconsistent, the radar signal processing algorithm can be judged to be in error, the algorithm error information is reported to the control center, and the radar is restarted; if the comparison result is consistent, a reset signal is sent, hardware error information is reported to the control center, and the radar is restarted.
The invention firstly determines whether data enter an algorithm signal processing flow or not through multi-step signal processing algorithm self-checking, then judges whether the radar stops working or not caused by the error of the signal processing algorithm, and finally reports error information to a control center by combining the information. The self-checking of the signal processing algorithm is carried out by the configurable self-checking threshold time, and the fault of the hardware module or the signal processing algorithm module can be judged on the premise of not influencing the normal work of the radar. The upper computer can configure the self-checking threshold time without manual starting of workers and field debugging and self-checking, and can complete self-checking work at any time and any place.
According to the invention, through self-checking in the signal processing algorithm process, the fault of the hardware module or the signal processing algorithm module can be judged, the fault reason is clear, and the workload of follow-up rechecking is reduced. The upper computer can configure the self-checking threshold value time, and in the using process, the self-checking can be conveniently, flexibly and quickly carried out in idle time. And determining whether the radar is in fault and the fault reason under the condition of not influencing the normal operation of the radar. Because the installation and maintenance are inconvenient, the self-checking can be carried out through a signal processing algorithm, manual control is not needed, and the workload is reduced. When the working stop time of the radar reaches the set self-checking threshold time, the self-checking module is started to work, radar faults are found in time and reported, workers quickly maintain or replace the radar, and the fairness and authority of traffic law enforcement are guaranteed.
The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above-mentioned embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may be made by those skilled in the art without departing from the principle of the invention.
Claims (9)
1. A self-checking method based on traffic speed measuring radar is characterized by comprising the following steps:
step S1: when the target non-output time of the speed measuring radar reaches a set threshold value of the upper computer, triggering a self-checking function to work;
step S2: judging whether echo data exist or not in the detection process of the speed measuring radar, if so, determining that the radar normally works, and jumping out of self-detection; if no echo data exists, the counter performs counting superposition, and when the counting accumulated value does not reach a set value, the counting value is kept and the next self-checking work is continued; when the count accumulated value reaches the set value, starting the next self-checking, and entering the step S3;
step S3: checking the data storage condition; reading the stored data into a signal processing flow, and comparing the stored data with a preset result; and judging the state of the traffic speed measuring radar according to the comparison result.
2. The self-checking method of claim 1, wherein in step S3, if the comparison result is not consistent, it is determined that the traffic speed radar signal processing algorithm is faulty, and if the comparison result is consistent, it is determined that the traffic speed radar signal processing algorithm is faulty.
3. The self-checking method based on the traffic speed measuring radar of claim 2, wherein in step S3, if the comparison result is inconsistent, a reset signal is sent, and hardware error information is reported to the control center, and the traffic speed measuring radar is restarted.
4. The self-checking method of claim 3, wherein in step S3, if the comparison result is consistent, the traffic speed radar is restarted to keep the state.
5. The utility model provides a traffic speed measuring radar which characterized in that, traffic speed measuring radar has the self-checking unit, the self-checking unit includes:
the self-checking counting module is used for counting the traffic speed measuring radar when no echo data exists in the detection process of the traffic speed measuring radar; when the accumulated value does not reach the set value, keeping the counter value and continuing to perform the next self-checking work; when the accumulated value reaches a set value, starting a proofreading data comparison module;
the checking data storage module is used for storing the detection data of the traffic speed measuring radar as a comparison basis;
the verification data comparison module is used for comparing the detection data in the verification data storage module with a preset result after being started; and judging the state of the traffic speed measuring radar according to the comparison result.
6. The traffic speed radar of claim 5, wherein the traffic speed radar signal processing algorithm is determined to be faulty if the comparison result of the comparison module of the calibration data is inconsistent, and the traffic speed radar signal processing algorithm is determined to be faulty if the comparison result is consistent.
7. The traffic speed radar of claim 6, wherein if the comparison result is inconsistent, a reset signal is sent, and the calibration data comparison module reports hardware error information to the control center and restarts the traffic speed radar.
8. The traffic speed radar of claim 6, wherein if the comparison result is inconsistent, a reset signal is sent, and the calibration data comparison module reports hardware error information to the control center and restarts the traffic speed radar.
9. The traffic speed radar of claim 8, wherein if the comparison result is consistent, the comparison module reports the comparison result to the control center, and the traffic speed radar is restarted to keep the state.
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