红外光源参数对光电编码器信号的影响

发布时间：2018-05-21 05:29

本文选题：光源 + 发散角　；参考：《红外与激光工程》2017年09期

【摘要】：红外发光管是光电编码器的重要组成部分,而光源参数对莫尔条纹信号的正弦性和正交性有直接影响,从而影响光电编码器的细分精度和分辨力。文中研究了其发散角、光源宽度对编码器的信号影响。首先,分析了光源对光栅信号光通量的影响,运用频域方法导出了透光特性函数;然后,分析了两种不同光源对同一码盘形成信号的影响;最后,应用Matlab仿真计算了莫尔条纹信号的对比度、正交性、正弦性。实验结果表明,使用两种不同光源的编码器精度相差达到30%,改进后的编码器高次谐波占比明显减少,信号稳定性好。因此研究光源参数对提取高质量莫尔条纹有重要意义,并为高精度编码器设计提供重要参考依据。
[Abstract]:Infrared luminous tube is an important part of photoelectric encoder, and the parameters of light source have direct influence on the sinusoidal and orthogonality of moire fringe signal, thus affecting the subdivision accuracy and resolution of photoelectric encoder. The influence of divergence angle and light source width on the signal of encoder is studied in this paper. Firstly, the influence of the light source on the luminous flux of the grating signal is analyzed, and the transmittance function is derived by using the frequency-domain method. Then, the influence of two different light sources on the formation signal of the same code disk is analyzed. The contrast, orthogonality and sinusoidal property of moire fringe signal are calculated by Matlab simulation. The experimental results show that the accuracy difference of the encoder with two different light sources is 30%, the high harmonic ratio of the improved encoder is obviously reduced, and the signal stability is good. Therefore, it is important to study the parameters of light source to extract high quality moire fringes and provide important reference for the design of high precision encoder.
【作者单位】：长春理工大学电子信息工程学院;中国科学院长春光学精密机械与物理研究所;
【基金】：国家自然科学基金(51505078)
【分类号】：TN762

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