Method and device for quantitative determination of paint surface flatness
A quantitative detection method and surface flatness technology, applied in the field of material surface flatness detection, can solve problems such as the inability to achieve quantitative detection
Active Publication Date: 2016-02-03
NORTHEASTERN UNIV
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[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
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[0028] The embodiment of the present invention: a quantitative detection method for the flatness of the paint surface, such as figure 1 As shown, including the following steps:
[0029] S1: Collect the low-coherence light interference spectrum of each position of the paint surface point by point at equal intervals, and obtain the low-coherence light interference spectrum matrix of each position of the paint surface;
[0030] S2: Calculate the phase difference between the low-coherence light interference spectra of adjacent positions on the paint surface Specifically, it includes the following steps: performing Fourier transform on the low-coherence light interference spectra at adjacent positions to obtain the corresponding complex exponential function; dividing the complex exponential function to obtain; wherein,
[0031] The low-coherence light interference spectrum at position 1 is:
[0032] The low-coherence light interference spectrum at position 2 is: Where I 1 (k), I 2 (k) is...
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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 quantitative detection method and device for the surface flatness of paint, belonging to the technical field of surface flatness detection of materials. Background technique [0002] In the automotive industry, the color, gloss and surface structure of the body paint affect people’s visual effects. Even a high-gloss coating film will have its appearance affected by surface fluctuations. People call this effect "Orange peel", orange peel can also be defined as "the wavy structure of a high-gloss surface". Paint the orange peel of the car body can produce the visual appearance such as marking on the surface of the coating. [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 paint surface and detect whether there are undul...
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Inventor 马振鹤马毓姝王毅
Owner NORTHEASTERN UNIV