A method for aiming and detecting the cut-off line in the vertical direction of low beam headlights

Abstract

The invention discloses an aiming detection method for an automobile dipped-headlight perpendicular-direction cut-off line. The aiming detection method includes the steps that the no-load height value and a no-load whole-automobile attitude angle of the dipped-headlight perpendicular-direction cut-off line under the automobile no-load state are obtained; a load whole-automobile attitude angle under the automobile load state is obtained; according to the no-load whole-automobile attitude angle, the no-load height value and the load whole-automobile attitude angle, the load height value of the dipped-headlight perpendicular-direction cut-off line under the load state is calculated and obtained; whether the load height value is in the preset range or not is judged, if the load height value is in the preset range, aiming detection is eligible. Multiple times of measurement are replaced through calculation, the process needing to be repeatedly loaded for multiple times in the actual measurement process is saved accordingly, unnecessary workloads are reduced, and the working efficiency is improved.

Description

technical field [0001] The invention relates to the field of automobile detection, in particular to a method for aiming at a cut-off line in the vertical direction of a low-beam lamp of an automobile. Background technique [0002] Exported vehicles need to pass the low-beam illumination certification required in ECER48 "Unified Regulations on the Installation and Certification of Vehicle Lighting and Lighting Signal Devices". load, but the front axle does not reach the rated load, that is, the center of gravity of the cargo is concentrated near the rear axle for some reason, and the cut-off line in the vertical direction of the dipped beam should meet the requirements of the initial aiming limit, that is, The height value of the cut-off line should be within the required range, and the export certification can only be obtained if the requirements of the regulations are met. [0003] Therefore, it is necessary to detect this height value, but when actually measuring the heig...

AI Technical Summary

Problems solved by technology

In the actual detection process, the front and rear axles must be weighed, and the difference between the actual value and the required value must be within a certain error range. Usually, multiple loadings are required to achieve the required axle load range, that is, repeated loading is required. Only by adjusting the load distribution multiple times can the load ratio requirements of the front and rear axles under different load conditions be met. This will not only cause a large amount of manual loading, time-consuming and laborious, but also delay the test process and reduce work efficiency.

Images