We use two additional sensors to measure the intensity of the diffuse reflection light in the range of the slits on both sides of the specular reflection light reflection angle, and objectively evaluate the haze. The test instrument for the haze value is one. In order to evaluate the appearance of the orange peel, the orange peel simulates the human eye, focusing on the surface and measuring the contrast in the light and dark areas, providing an objective orange peel measurement and the measurement method is well linked to the visual assessment. The laser spot light is used to irradiate the template, and the human eye's visual reflection on the template is simulated from the perspective of the surface structure. The light source irradiates the template with a person's shooting angle and measures the reflected light on the other side. The instrument moves distance on the template and scans the template. When the illumination light shines on the peaks or valleys of the surface fluctuations, the maximum signal value is obtained. When the illumination is on the slope, only the minimum value of the signal can be detected, which is the position of the peak and valley. Slope position. The shape of the outline can be seen through the test. The measuring system contains an additional reflector that compensates for light intensity in diffuse reflections that have not been reflected by the surface. To facilitate the study of haze by humans, haze values ​​are usually expressed in logarithms. The logarithm of haze is calculated based on the linear intensity of the diffuse light. The logarithmic conversion for photometric compensation is the logarithmic conversion for photometric compensation, which is a linear haze value, which is set under the specific conditions of the non-pigment high reflection surface. The orange peel people's vision can see a surface structure, but it can not distinguish the undulation of the surface structure, such as the orange peel phenomenon, and can only describe the light intensity from a three-dimensional angle and can not actually see the mechanical shape curve of the structure. The greater the contrast of the surface structure with respect to the reflection of light, the more easily the structural state of the surface can be observed. The measurement of specular gloss and haze does not include the visual distance to the human eye. The human eye can see the width of the line. To be comparable to the resolution of the human eye, the instrument is in range and is read every second. At the distance, you can see the wide lines separated by bars. And within the scope of instrument movement, mathematical filtering is used to divide the original data into long corrugated surface structure dimensions and short corrugated deep structure dimensions. Long ripples represent changes in longer amplitudes, and short ripples represent changes in shorter amplitudes. Test Application Using the above test method, we tested the state of the paint film on the vehicle body surface. For ease of comparison and analysis, we tested the thickness of the paint film and the roughness of the film surface. The reflection luster was also measured and used as a reference for analysis. By comparison, the surface parameters of the paint film were different, and its visual effects also reflected significant changes. The following preliminary conclusions have been analyzed: Under the same construction conditions, using the same paint material to spray the workpiece, it can be seen that the material properties of the paint have a certain influence on the appearance of the paint film, but it does not cause large quality fluctuations in the visual effect. The construction method, environmental conditions, and the surface condition of the substrate are important factors affecting the visual effect.
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