Motor vehicle parking deflection angle testing method and device

Abstract

The invention relates to motor vehicle parking deflection angle testing method and device. The motor vehicle parking deflection angle testing method comprises the steps of: moving a longitudinal collimated radiation device; respectively emitting emission collimated radiation and receiving collimated radiation by the left and the right sides of the longitudinal collimated radiation device, wherein the collimated radiation beam emitted from the left side reaches the inner side wall of a left tire and is reflected, timing starts when the longitudinal collimated radiation device starts to receive the collimated radiation beam, the collimated radiation beam emitted from the right side reaches the inner side wall of a left tire and is reflected, and timing stops when the longitudinal collimated radiation device starts to receive the collimated radiation beam; measuring to obtain a distance D for the collimated radiation device to walk in the time period and simultaneously acquiring tire spacing L of a motor vehicle; and calculating to obtain a deflection angle theta according to the deflection angle computational formula: theta is equal to arctg(D / L). The invention measures parking angle of vehicles and can utilize the parking angle of the vehicles to correct the actual deflection angle of light. The invention has simple and convenient operation, simple structure, high efficiency and accurate measurement.

Description

technical field [0001] The patent of the present invention relates to a method and a device for testing the declination angle of vehicle parking. Background technique [0002] The motor vehicle light detector is mainly suitable for automobile inspection and maintenance completion lines and automobile repair shops. It can detect and adjust the installation position of automobile headlights through manual operation to ensure that the irradiation directions of far and near lights meet the requirements of the national standard. [0003] In order to ensure the correctness of the angle measurement results, when using the light detector, it is required to ensure that the longitudinal axis of the car is vertically aligned with the light detector screen. error, the accuracy of the light detection results cannot be guaranteed. In order to overcome this problem, the following two ways are usually used as the solution to this problem. [0004] 1. Car straightener [0005] The front a...

AI Technical Summary

Problems solved by technology

Its shortcomings are that, on the one hand, it cannot adapt to models with different wheelbases, and cannot carry heavy vehicles; on the other hand, the structure of the aligner is complicated and huge, and it is difficult to install; the operation is relatively complicated, the adjustment time is long, the detection efficiency is low, and the cost is high

This method is susceptible to interference from external image changes. At the same time, it cannot measure well for some complex shapes or left-right asymmetric structures.

Images