System and method for measuring vehicle outline dimensions based on machine vision and laser light curtain

Abstract

The invention belongs to the technical field of test and measurement, provides a system and method for measuring vehicle outline dimensions based on machine vision and a laser light curtain, and high-precision, real-time and rapid measurement for feature sizes such as the length, width and height of a vehicle can be achieved on the premise of not influencing the normal running state of the vehicle. According to the technical scheme, the system for measuring the vehicle outline dimensions comprises a vehicle outline length dimension measuring module, a vehicle outline width dimension measuring module and a vehicle outline height dimension measuring module. Furthermore, a group of one-dimensional laser detector arrays are installed on a position, relative to the same height of the transverse laser light curtain, of the other side of a running measuring area of a vehicle to be measured, and the one-dimensional laser detector arrays are used for detecting laser beams output by the transverse laser light curtain sheltered by a vehicle which is not tested. The system and method for measuring vehicle outline dimensions based on machine vision and the laser light curtain are mainly applied to vehicle detection.

Description

technical field [0001] The invention belongs to the technical field of test and measurement, in particular to the design method of a real-time dynamic measurement system for the height dimension, width dimension and length dimension of a traveling vehicle in the vehicle outer contour dimension measurement technology, that is, the vehicle exterior dimension based on machine vision and laser light curtain. Contour dimension measuring system. technical background [0002] In recent years, with the rapid development of the economy and the rapid growth of the number of various domestic motor vehicles year by year, major traffic accidents caused by large transport vehicles have occurred frequently, resulting in a large number of personal injuries and property losses. The main reasons are: due to the fierce competition among vehicle operators, the excess transportation capacity is constantly squeezing the limited market space. In order to reduce costs, operators often operate under...

AI Technical Summary

Problems solved by technology

The main reasons are: due to the fierce competition among vehicle operators, the excess transportation capacity is constantly squeezing the limited market space. In order to reduce costs, operators often operate under the condition that the transportation vehicles exceed the limit to increase profits. The probability of traffic accidents has brought safety hazards to people's lives and social economy

However, at present, the detection and measurement of the outer contour of the vehicle has not yet fully automated in China. The main measurement method is the manual tape measure method, that is, according to the vertical projection of the outer contour of the vehicle on the ground and the wall, the length, Measure the characteristic dimensions such as width and height; or use a tape measure to measure directly on the car body, and this method needs to be in a stationary state of the vehicle, and some methods use visual methods to estimate, which has low measurement efficiency and large human errors , not conducive to information management and other limitations

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