Quantitative detection method and device for paint surface roughness

Abstract

The invention discloses a method and a device for quantitative determination of paint surface flatness. The method comprises the following steps: S1, collecting low-coherence light interference spectra of positions on a paint surface at equal intervals one point after another, and obtaining a low-coherence light interference spectrum matrix of the positions of the paint surface; S2, calculating the phase difference [Delta]phi between the low-coherence light interference spectra of any two adjacent positions on the paint surface; S3, calculating a depth distance difference [Delta]z of the two adjacent positions according to the phase difference [Delta]phi; and S4, calculating the integral of the depth distance difference [Delta]z and obtaining the flatness quantitative distribution of the paint surface. The invention provides a brand new technology for automobile paint surface flatness determination, achieves quantitative determination of paint surface flatness, thus helps people understand the flatness situation of the paint surface more directly and concretely and find the cause of ups and downs of the paint surface, and provides clearer guidance for modification and coating techniques.

Description

technical field [0001] The invention relates to a method and a device for quantitatively detecting the flatness of a paint surface, belonging to the technical field of detection of the flatness of a material surface. Background technique [0002] In the automotive industry, the color, gloss, and surface structure of body paint affect people's visual effects. Even a high-gloss coating film will have its appearance affected by surface fluctuations. This effect is called "Orange peel", orange peel can also be defined as "the wavy structure of a high-gloss surface". Orange peel on painted bodies can create visual appearances such as mottled surfaces. [0003] At present, for the detection of the flatness of the paint surface, the coating industry generally uses an orange peel meter to measure the orange peel condition of the material surface. However, this method can only qualitatively detect the flatness of the painted surface, detect whether there are undulations on the pain...

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to provide a method and device for quantitatively detecting the flatness of the paint surface, which can effectively solve the problems in the prior art, especially the prior art can only perform qualitative detection on the flatness of the paint surface, and cannot Achieving Quantitative Detection Issues

Images