Vehicle driving deviation automatic detection method based on vehicle-mounted image sensor

Abstract

The invention discloses a vehicle driving deviation automatic detection method based on a vehicle-mounted image sensor. The vehicle driving deviation automatic detection method comprises the followingsteps: 1) collecting images of a vehicle running to two measuring points in a running deviation test area through the vehicle-mounted image sensor, wherein a lane center line for identification, a first measuring point and a second measuring point are arranged in the running deviation test area; 2) identifying and processing the acquired image comprising the lane center line to obtain the pixel coordinates of the vehicle at the first measuring point and the second measuring point, and extracting the pixel coordinates of the feature point of the lane center line; 3) calibrating the camera, andcalculating a conversion matrix for converting pixel coordinates into world coordinates; and 4) according to the world coordinates corresponding to the two measuring points, obtaining the driving deviation amount of the vehicle in the test distance, and the test distance being the interval distance between the two measuring points. The method is high in detection efficiency, can determine the vehicle driving-in angle during initial triggering, does not need other triggering points, and is simple and convenient in test field layout.

Description

technical field [0001] The invention relates to the field of vehicle detection, in particular to an automatic detection method for vehicle deviation based on a vehicle-mounted image sensor. Background technique [0002] Vehicle deviation refers to the phenomenon that the vehicle deflects to the left or right when the vehicle is driving straight on a dry and straight road without any intervention from the driver on the steering wheel. Four-wheel alignment parameters, parts manufacturing, vehicle assembly, tire matching, etc. have an inevitable impact on vehicle deviation. The deviation of the car during straight-line driving will not only cause wear and tear on parts and tires, but even threaten the safety of users' lives and property. With the improvement of people's requirements for the overall performance of automobiles, the problem of vehicle deviation is increasingly concerned by the industry. In order to prevent vehicles with deviation from entering the market, it is v...

AI Technical Summary

Problems solved by technology

This vehicle test scheme is simple and convenient, does not require frequent maintenance of equipment, and can make up for the shortcomings of the above two schemes. However, the test results of this scheme are affected by the GPS signal atmospheric delay, multipath effect, satellite clock and receiver clock error, and the real-time performance is not good. Strong, low precision, unable to meet the requirements of high-precision deviation testing

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