Calibration system for commercial vehicle vision measurement based on longitude and altitude spatial positioning principle

Abstract

The invention discloses a calibration system for commercial vehicle vision measurement based on a longitude and altitude spatial positioning principle and aims to overcome the defect that three degree-of-freedom adjustment of an automobile vehicle positioning parameter stereoscopic vision detection system cannot be realized. The calibration system comprises two calibration plates (1) and a cross laser line (2). Due to adoption of the structures of the two calibration plates (1) and the cross laser line, the calibration plates (1) can be randomly adjusted and calibrated on a large-scale spatial range of commercial vehicles, so that the problem that the vision measurement accuracy is decreased outside the space determined by the calibration plates (1) because the calibration plates (1) are too small is solved. The calibration system has the characteristics of relatively small size, convenience in operation, reliable performance, high generality, low manufacturing cost, high precision and the like, and has great significance for technical progress in the field of machine vision detection.

Description

technical field [0001] The invention relates to a calibration device in the field of the automobile industry, more specifically, it relates to a calibration system for visual measurement of commercial vehicles based on the principle of spatial latitude and longitude positioning. Background technique [0002] In order to ensure the safe driving of automobiles, the measurement of vehicle dimensions is one of the main inspection items in the field of automobile inspection. At present, the measurement of vehicle size is mainly based on manual meter measurement, which has low efficiency, poor accuracy, and high labor intensity for staff. The method of collecting car images and then measuring the size of the whole vehicle solves the above technical bottlenecks. However, due to the large size of the commercial vehicles in the longitudinal direction, the calibration board cannot cover the entire size range of the car, which often leads to high measurement accuracy within the calibra...

AI Technical Summary

Problems solved by technology

[0003] The present invention adopts the structure of two calibration boards and the laser line thrower, so that the calibration board can be adjusted and calibrated at any position within the large-scale space range of the commercial vehicle, and the horizontal projection plane of the laser line thrower determines the two calibration boards on the horizontal plane. The relative position of the calibration board and the alignment of the two calibration boards in the height direction are achieved, the purpose of using a small calibration board to calibrate in a large field of view is achieved, and the visual system outside the space determined by the calibration board is solved due to the too small calibration board. The problem of decreased measurement accuracy, the system has the characteristics of small size, adjustable position and angle of the calibration plate, easy operation, reliable performance, strong versatility, easy installation, low manufacturing cost, and high precision. The calibration system for the visual measurement of commercial vehicles based on the principle of spatial latitude and longitude positioning required by the quality supervision department and the calibration of the manufacturer is of great significance to the technological progress in the field of machine vision inspection

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