GPT-1型光栅偏心调整检验仪

GPT-1 Grating Eccentricity Adjustor of Electronic Digital Theodolite

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 。

Based on the characteristic equation of Moire fringe generated by two eccentric gratings,four methods of grating eccentricity adjustment,that could be used to adjust grating eccentricity of electronic digital theodolite,were analyzed,and the feasibility of these methods were studied also Then,a feasible adjustment project,which includes two steps:coarse adjustment with base circle on CCD image system and fine adjustment with Liszo circle on virtual digital oscillograph,was adopted in the GPT 1 Grating Eccentricity Adjustor,in which the arithmetic of phase correlation and curve fit were used to separate the eccentricity of grating and the axes shaking The configuration of GPT 1 Grating Eccentricity Adjustor were introduced and the results of eccentricity adjustment were given finally It was showed that the adjustor has been very effective for the assemblies and the adjustment of electronic digital theodolite