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A multi-lane speed measurement method based on radar system

A multi-lane, radar technology, used in measurement devices, traffic control systems, radio wave measurement systems, etc., can solve problems such as high cost, low speed measurement accuracy, and troublesome installation, achieve high-precision vehicle speed, and eliminate mutual interference. Effect

Active Publication Date: 2022-01-07
NANJING UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method is costly, troublesome to install, and the speed measurement accuracy is not high in complex environments

Method used

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  • A multi-lane speed measurement method based on radar system
  • A multi-lane speed measurement method based on radar system
  • A multi-lane speed measurement method based on radar system

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Experimental program
Comparison scheme
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Embodiment 1

[0108] In order to verify the validity of the scheme of the present invention, use matlab to carry out the following simulation verification.

[0109] Simulation conditions: the radar center frequency is f 0 =24GHz, bandwidth B=150MHz, multi-order linear continuous wave signal with pulse repetition period Tr=100ms. The input of the algorithm is four groups of radar detection points with superimposed noise, and the real vehicle speeds are 30km / h, 70km / h, 110km / h, and 150km / h respectively.

[0110] The first step is to carry out intra-frame point trace aggregation on these four groups of detection points respectively, and obtain the four groups of target points after condensation;

[0111] In the second step, the track correlation between frames is carried out for these four groups of point tracks respectively, and four groups of target tracks are obtained;

[0112] The third step is to use the eigendecomposition method to fit the vehicle driving plane for the six consecutive ...

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Abstract

The invention discloses a multi-lane speed measurement method based on a radar system, which acquires azimuth information and radial speed information of vehicles, determines the detection point track of each frame vehicle, and the running track of each vehicle; divides vehicles according to time gates Track, plane fitting is performed on each track segment in the three-dimensional detection coordinate system, and the two-dimensional coordinates of each projection point in the two-dimensional projected coordinate system are determined; the linear equation of the vehicle running in the two-dimensional projected coordinate system is fitted, According to the conversion relationship between the two-dimensional projected coordinate system and the three-dimensional detection coordinate system, the space linear equation in the three-dimensional detection coordinate system is determined, and then the moving direction of the vehicle in the corresponding time gate is obtained, and the moving speed of the vehicle is estimated. The method of the invention has high speed measuring precision, can simultaneously detect the characteristics of multiple lanes, and avoids mutual interference between multiple lanes and multiple targets.

Description

technical field [0001] The invention belongs to the technical field of radar data processing, in particular to a multi-lane high-precision speed measurement method for road traffic applications using a radar system. Background technique [0002] With the development of social economy, urban traffic problems have attracted more and more attention. The problems of traffic accidents caused by violations such as speeding emerge in an endless stream. Therefore, the regulatory issue of vehicle speeding has caused us a large enough concern. [0003] Common traffic speed measurement uses ground sensing coils, microwave radars, and interval speed measurements to measure vehicle speed. Among them, the method of ground sense coil estimates the speed of the vehicle by calculating the time difference between the two coils successively passed by the vehicle, which has high accuracy, but the working life of the coil is short and the layout is inconvenient; The Le effect is used to calcu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G08G1/052G01S13/58
CPCG08G1/052G01S13/585
Inventor 张仁李王尧盛卫星马晓峰韩玉兵
Owner NANJING UNIV OF SCI & TECH