基于聚焦光針干涉和共焦成像的多功能表面形貌測量系統(tǒng)
[Abstract]:The surface morphology has a great influence on the wear resistance and coordination of the parts. The surface morphology measurement and analysis and evaluation are very important to improve the product quality and control the processing process. At present, most of the measurement methods of surface topography measurement instruments are single, and there are inevitable defects. In this paper, a non-contact multifunctional surface topography measurement system is developed based on focusing light needle interference and confocal microimaging, which can meet the needs of different engineering surface topography measurement. The main work of this paper is as follows: 1. The measurement methods of surface topography based on focused light pin interference and confocal microimaging are studied, and the measuring properties and influencing factors are analyzed. The transverse resolution and longitudinal resolution of focused photoneedle interferometry are 1.3 渭 m and 5 nm respectively. The transverse resolution of confocal microscopy is 0.5 渭 m, the vertical resolution is 1.5 渭 m, and the vertical measurement range is 40 渭 m.2.A multifunctional surface topography measurement system has been developed. The key components of the measurement system are designed. The measurement sensor integrates focused light needle and confocal microscopic imaging. The measurement path is based on the Linnik interference microstructure and the opening and closing of the shading baffle can be changed by adjusting the opening and closing of the light shield. The three-dimensional drive system is designed. The vertical drive system uses piezoelectric ceramic to drive the flexure hinge to realize the nanometer displacement, and the grating measurement system can measure the displacement in real time. The vertical displacement resolution is 1 nm, the stroke is 40 渭 m, and the horizontal drive is realized by a two dimensional precision worktable with a common moving plane. The resolution is 0. 2 渭 m, and the measurement range is 30mm 脳 30 mm. 3. The performance of the vertical drive system and the two dimensional precision worktable is tested and analyzed experimentally. The positioning accuracy, straightness and the positioning accuracy of the vertical drive system of the two-dimensional precision worktable are measured by using the Agilent5519B dual-frequency laser interferometer. The experimental results show that the drive system can meet the requirements of the measurement system. A software system is designed to test and verify the performance of the measurement system and to measure the typical samples. The experimental results show that the system can be used to measure the surface roughness of general engineering surface.
【學(xué)位授予單位】:華中科技大學(xué)
【學(xué)位級別】:碩士
【學(xué)位授予年份】:2015
【分類號】:TG84
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