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从光栅副形成莫尔条纹的特性方程出发 ,分析了对电子经纬仪的光栅副偏心调整的四种方法 :莫尔条纹调整法、漏缝调整法、基圆调整法和基于李萨茹圆的电调整法。根据实际情况 ,确定了对光栅偏心调整采用基于 CCD图像系统的基圆调整法进行粗调 ,和基于虚拟数字示波器的精调法相结合的方案 ,采用曲线拟合和相关法 ,计算出光栅偏心的大小与方位 ,并给出了光栅偏心与轴晃的关系 ,介绍了 GPT- 1型光栅偏心调整检验仪的组成和功能 ,最后给出了仪器的调整检验结果。实践表明 ,GPT- 1型光栅偏心调整检验仪为电子经玮仪的装配、光栅偏心调整和偏心检验起到了重要的指导作用 ,大大地提高了生产效率
Based on the characteristic equation of moire fringes, four methods for adjusting the eccentricity of the electronic theodolite are analyzed: the moire fringe adjustment method, the leakage adjustment method, the base circle adjustment method and the electric method based on the Lissajous circle Adjustment method. According to the actual situation, the scheme of coarse adjustment of base adjustment method based on CCD image system and the fine adjustment method based on virtual digital oscilloscope are determined for eccentric adjustment of grating, and curve fitting and correlation method are used to calculate the grating eccentricity Size and azimuth, and gives the relationship between the eccentricity of the grating and the rotation of the shaft. The composition and function of the GPT-1 grating eccentric adjustment tester are introduced. Finally, the adjustment test results of the instrument are given. Practice shows that, GPT-1 type grating eccentricity adjustment tester for the electronic assembly by Wei, grating eccentric adjustment and eccentricity test has played an important guiding role, greatly improving the production efficiency