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在批量生产小型光电编码器的过程中,出厂检验不仅要对光电编码器动态误差进行检测,也要对不达标编码器进行误差溯源及修正。在实现对光电编码器高、低转速下的动态误差检测的同时,需要快速的定位光电编码器动态误差超标的原因,使生产者能够根据误差超标原因对编码器进行调校。为此,提出了光电编码器检测方法及评估方法,设计了小型光电编码器动态误差检测及评估系统。首先,从低、中、高频率方面对光电编码器误差组成分析,明确了各频率误差的产生原因;然后,提出了采用AR模型谱估计法对动态误差进行评估的方法,并根据误差评估结果给出误差产生因素判定;最后,设计了小型光电编码器动态误差评估系统,实现了对光电编码器的动态误差检测,并给出误差评估结果。所设计的检测系统工作转速范围为0.5~8 r/s,检测精度优于2″;误差评估系统能够清晰的显示出动态误差在各频率下的均方值,使生产者能够轻易地找到不达标编码器的调校方法。该系统准确可靠、显示直观,为批量生产光电编码器提供了简单有效的检测评估手段。
In mass production of small photoelectric encoder in the process, the factory inspection not only to the optical encoder dynamic error detection, but also not up to standard encoder error traceability and correction. While realizing the dynamic error detection of optical encoder at high speed and low speed, it is necessary to quickly locate the reason why the dynamic error of the photoelectric encoder exceeds the limit, so that the producer can adjust the encoder according to the reason that the error exceeds the standard. To this end, the photoelectric encoder detection method and evaluation method are proposed, and a small optical encoder dynamic error detection and evaluation system is designed. First of all, from the aspects of low, medium and high frequency, the errors of photoelectric encoder are analyzed and the cause of each frequency error is clarified. Then, the method of estimating the dynamic error by spectrum estimation of AR model is proposed. According to the results of error evaluation Finally, the dynamic error evaluation system of small photoelectric encoder is designed, the dynamic error detection of optical encoder is realized, and the error evaluation result is given. The working speed range of the designed detection system is 0.5 ~ 8 r / s and the detection accuracy is better than 2 ". The error evaluation system can clearly show the mean square error of the dynamic error at each frequency so that the producer can easily find out The calibration method of the standard encoder is accurate and reliable.The system is intuitive and provides a simple and effective test evaluation method for mass production of photoelectric encoder.