Device and method for measuring laser reflectivity on the surface of a metal test piece
A metal test piece, laser reflection technology, applied in the direction of color/spectral characteristic measurement, etc., can solve problems such as inaccurate measurement results, and achieve the effects of wide application range, simple operation, and convenient placement of test pieces
Inactive Publication Date: 2019-06-07
NORTHWEST INST OF NUCLEAR TECH
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Problems solved by technology
[0004] In order to solve the technical problem of inaccurate measurement results of the existing effect test piece surface reflectance measurement method, the present invention provides a metal test piece surface laser reflectance measurement device and method that overcomes thermal radiation signal interference
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[0027] The invention provides a device and method for measuring laser reflectivity on the surface of a metal test piece. The measurement signal and the background thermal radiation signal are respectively obtained by setting the measuring integrating sphere and the background integrating sphere, and the real reflectivity coefficient is obtained by data processing, which overcomes the problem of metal test pieces. The influence of the thermal radiation signal on the measurement results of the surface of the workpiece at high temperature. The structure of the preferred embodiment of the measuring device of the present invention is as follows: figure 2 As shown, it includes a measurement integrating sphere 41 and a background integrating sphere 42 arranged adjacent to each other, and a through test piece installation hole 6 is provided at the connection between the two; the test piece installation hole 6 is used to place a metal test piece or a standard test plate to be measured....
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Abstract
The invention belongs to the technology field of laser effect testing, and relates to a metal test piece surface laser reflectivity measuring device and method. The provided device comprises a measuring integrating sphere and a background integrating sphere. The joint between the measuring integrating sphere and the background integrating sphere is provided with a penetrating test piece installation hole. A measuring photoelectrical detector is arranged on the measuring integrating sphere. A background photoelectrical detector is arranged on the background integrating sphere. The measuring integrating sphere is also provided with a laser inlet hole. The laser inlet hole is arranged on the sphere wall opposite to the test piece installation hole. A serially connected integrating sphere set is provide, the measuring integrating sphere is used to obtain the measuring signals, the background integrating sphere is used to obtain the background thermal radiation signals, after data processing, a real reflectivity coefficient is obtained, and the influence of thermal radiation signals on the reflectivity measurement is eliminated, when the surface of a metal test piece is at a high temperature.
Description
technical field [0001] The invention belongs to the technical field of laser effect testing, and relates to a device and a method for measuring the surface reflectance of a metal test piece. Background technique [0002] When studying the coupling law between laser and metal materials, it is usually necessary to measure the relationship between the surface reflectance coefficient of the effect test piece and the laser power and the light emitting time. The more common method is as figure 1 The measuring scheme of the integrating sphere shown: in the first step, the standard test board is placed inside the integrating sphere 4, and the response signal of the photodetector 5 loaded on the standard test board by the laser 1 is measured, and in the second step, the effect test piece 3 is placed Inside the integrating sphere 4 , the response signal of the photodetector 5 loaded by the laser light 1 on the effect test piece 3 is measured, and the comparison between the two is the...
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IPC IPC(8): G01N21/27
CPCG01N21/27
Inventor 吴涛涛陈绍武周孟莲韦成华朱永祥王家伟吴丽雄王立君
Owner NORTHWEST INST OF NUCLEAR TECH