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Method for detecting abnormal events by using Doppler radar

A Doppler radar, abnormal technology, applied in the field of intelligent transportation, can solve the problems of large camera error, failure to work, and difficulty in judging rules, and achieve high detection efficiency

Active Publication Date: 2018-01-26
天津智芯视界科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Video detection has a relatively wide detection range, can detect a variety of events, is low in cost, and is relatively simple to maintain. However, due to interference from adverse weather, light changes, camera shake, etc., the camera may have large errors or even fail to work. Judgment of the rules will cause great difficulties

Method used

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  • Method for detecting abnormal events by using Doppler radar
  • Method for detecting abnormal events by using Doppler radar
  • Method for detecting abnormal events by using Doppler radar

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Experimental program
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Embodiment

[0021] The method for using Doppler radar to detect abnormal events proposed by the present invention comprises the following steps:

[0022] S1. Install Doppler radar next to the camera rack, use Doppler radar to monitor the road and obtain radar data, such as figure 1 Shown: the abscissa range is -128~127, a total of 256 discrete values, their fast Fourier transform values ​​(FFT) at different frequencies, here represent different speeds, the measurement range is 0~128, positive numbers represent the speed of the object The direction of movement is close to the radar. A negative number means that the moving direction of the object is away from the radar. B represents the value of FFT, and A represents the corresponding threshold. If the value of FFT exceeds the threshold, it means that there is a linear relationship between the abscissa corresponding to the point and the speed of the moving object. , for the convenience of expression, there is a one-to-one correspondence bet...

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Abstract

The invention discloses a method for detecting abnormal events by using a Doppler radar. The method includes the following steps: installing a Doppler radar beside a camera holder, monitoring a road by using the Doppler radar, acquiring radar data; acquiring a random process by computing the transition probability function between each two speeds; establishing a state transition network by acquiring the radar data of a vehicle with a time period in normal circumstances; performing queries in the state transition network, computing the state transition probability between speed A1 to speed A3 at two adjacent times in the random process, such that the most possible condition which might occur is obtained and an early-warning is sent. According to the invention, the method herein can help a camera to intelligently detect events when conditions are unfavorable, and can perform real-time and effective detection on vehicles and detect abnormal parking, over speed and slow speed driving, andwrong-way driving on the road. The method has the characteristics of high detection efficiency and wide range of applications.

Description

technical field [0001] The invention relates to the technical field of intelligent transportation, in particular to a method for detecting abnormal events using Doppler radar. Background technique [0002] In recent years, with the continuous increase of traffic volume, the problem of traffic congestion has become increasingly prominent. The traffic accidents (including traffic accidents) on the road are gradually increasing, which brings great inconvenience to people's daily travel, and even threatens people's lives and property. At the same time, the traffic incidents also reduce the transport efficiency of the road and the average speed of the vehicle, which seriously affects the operation of the road. Therefore, once a traffic incident occurs on the road, it is necessary to quickly discover the incident and make a response to reduce the harm caused by the incident as much as possible. Traffic incident detection refers to the use of various detection methods to distingu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G08G1/01G08G1/052
Inventor 饶晓春于泽张玉玺方正鹏
Owner 天津智芯视界科技有限公司
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