Method for controlling microwave vehicle detecting radar

Abstract

The invention discloses a method for controlling microwave vehicle detecting radar, comprising the following steps: microwave detecting radar work parameter is evaluated; pulse compression in the range direction is carried out; sub-echo of each target vehicle is respectively extracted, and whether advancing vehicle exists is judged, speed search is carried out on data of each sub-echo of advancing vehicle, one matched filtering function is obtained after each search, pulse compression in the azimuth direction is carried out, and then the kurtosis value is calculated; if the largest kurtosis value is obtained, the search speed corresponding to the largest kurtosis value is the traveling speed of the vehicle, frequency modulation slope in the azimuth direction is calculated according to the speed and pulse compression in the azimuth direction is carried out, and then signals of each range gates are added and are compared with the set threshold to obtain vehicle length; if the largest kurtosis value is not obtained, then search is kept on by returning to the previous step. The invention has numerous monitoring lanes, wide detection range and more precise detecting speed, can detect vehicle with low speed or even standing vehicle precisely, and can estimate vehicle length, thereby facilitating traffic control.

Description

technical field [0001] The invention relates to a control method of a microwave vehicle detection radar, which is mainly used to detect the speed, quantity and vehicle length information of vehicles traveling in multiple lanes. Background technique [0002] In the field of road traffic monitoring, the detection of vehicle speed usually includes practical products such as detectors based on video target recognition technology, detectors based on ground sensing coil technology, detectors based on infrared or laser technology, and detection radars based on microwave technology. Due to the different technologies used, the corresponding equipment has its own characteristics and certain deficiencies. [0003] Based on the video target recognition technology, the detector is susceptible to the trapezoidal error caused by the camera installation inclination and the road surface inclination when detecting the vehicle position. However, there will be a large error, so the application...

AI Technical Summary

Problems solved by technology

[0003] Based on the video target recognition technology, the detector is susceptible to the trapezoidal error caused by the camera installation inclination and the road surface inclination when detecting the vehicle position. And there will be a large error, so the application field is limited

[0004] When installing a detector based on ground sensing coil technology, the construction of the embedded coil is complicated, and the road must be closed and the road surface damaged

When the vehicle is speeding and heavily loaded, the damage rate of the coil is high, and even the average life of the coil in some road sections is only a few months. At the same time, the detector based on the ground induction coil technology is also prone to false alarms when it is disturbed by rain

[0005] Detectors based on infrared or laser technology are relatively accurate in measurement, but they also have the following disadvantages: limited by the principle of laser speed measurement, the laser beam must be aimed at the plane reflection point perpendicular to the laser beam, and because the measured vehicle is too far away and in the In the moving state, or the plane of the vehicle body is not large, the success rate of laser speed measurement is low and difficult, especially the work intensity of police officers on duty is very high, and they are prone to fatigue; in view of the principle of laser speed measurement, it is impossible for laser speed measurement in motion It can only be used in a static state; therefore, the laser speedometer cannot be called a "mobile electronic police". The straight-line propagation characteristics lead to a large blind area of ​​speed measurement. At present, the relatively mature infrared or laser speed measurement in the market has a high rate of missing vehicles and high cost. Even if the viewfinder and control parts are not included, the price is relatively high.

If the speed of the vehicle is relatively slow or even stopped, the detection radar measurement error of the side-view work will be greater, and the vehicle cannot even be detected.

The reason for the above analysis is that the existing side-view microwave vehicle detection radars generally have problems, that is, the detection of vehicles with a certain speed is relatively accurate, but the detection effect of slow vehicles is greatly reduced, and it is difficult to detect information such as the length of the vehicle

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