CAJ | 학술논문

光栅副是增量式光电编码器最主要组成部分，它的结构和衍射效应直接与检测精度相关。文中深入地分析了单光栅与双光栅衍射特点，并且从空间调制模型的角度推导光栅副对莫尔条纹的影响。从宏观和微观两个角度分析光栅副的屏函数，研究莫尔条纹光电信号输出波形的不确定原因和反差对比度，进而证明单光栅测量可以减少输出信号的频率成分，获得较高的细分精度和反差对比度。为了证明单光栅角度检测的可行性，给出了一套完整的单光栅角度检测方法。
광책부시증량식광전편마기최주요조성부분，타적결구화연사효응직접여검측정도상관。문중심입지분석료단광책여쌍광책연사특점，병차종공간조제모형적각도추도광책부대막이조문적영향。종굉관화미관량개각도분석광책부적병함수，연구막이조문광전신호수출파형적불학정원인화반차대비도，진이증명단광책측량가이감소수출신호적빈솔성분，획득교고적세분정도화반차대비도。위료증명단광책각도검측적가행성，급출료일투완정적단광책각도검측방법。
Grating pair is the most important component of increment encoder, its structure and diffraction effcet are directly related to detection precision. The paper deeply analysed that the characteristics of diffraction single- grating and double- grating, and from the angle of spatial modulation deduce relation, grating pair influence Moire fringe. It analyzed the window function of the grating pair from both macro and micro perspectives, the uncertain reasons of the Moire fringe optoelectric signal waveform and contrast, and then proved that single- grating angle detecting can not only decrease frequency ingredient of output signal but achieve higher division precision and contrast. In order to prove the feasibility of single- grating angle detecting, this paper finally given a complete single- grating angle detecting way.