基于光电编码器的测速方法研究及实验验证

Research of Speed Measuring Methods and Experimental Verification Based on Photoelectric Encoder

基于光电编码器研究了多种测速算法的差异,并通过实验对结果进行了验证。采取软硬件结合的方法,以NI采集设备和Lab VIEW软件为开发平台,并利用光电编码器和PCB激光转速计等设备,搭建了一套瞬时转速测量系统。利用光电编码器得到实验台主轴旋转时的脉冲信号,分别利用M法、变M法和变M/T法对数据进行处理得到瞬态转速值;将PCB激光转速计测量的转速平均值作为参照值,对不同转速工况下的各种测速方法进行误差分析。研究结果表明:变M/T法在所有的旋转工况中精度都比较高,是瞬时转速计算方法中的首选。

Studied the difference of varieties of speed measurement algorithm based on photoelectric encoder,and gotverification through experiment. Established a set of instantaneous rotational speed measurement system combinedsoftware and hardware with NI acquisition device and the LabVIEW software development platform,and used thephotoelectric eneoder and PCB laser tachometer and equipment. Used photoelectric eneoder to get the pulse signal oftest bench,and proceed the data with the method of variable M/T,M ,variable M to get the transient speed value;Presumed measurements value of PCB laser tachometer as reference value,and made all kinds of speed measuringmethod for error analysis under different speed conditions. The results show that the accuracy of variable M/Tmethod in all rotation condition is high ,and is the first choice method of the instantaneous speed calculation.