普遍用于提供闭合回路控制中位置信息的光学编码器是受四种误差支配的,这些误差可用简单的测试方法检测出来。越来越多的机械装置正在采用微处理机控制实现自动化。这些装置的一个重大要求是对机械运动或位置进行精密测量,而增量光学编码器就常用于提供这方面的测量。增量编码器是借助于探测器处光的闪耀,通过含有交替的透射与非透射“狭缝”的转盘 Optical encoders commonly used to provide positional information in closed-loop control are governed by four errors that can be detected using a simple test method. More and more mechanical devices are being automated using microprocessor control. A major requirement of these devices is the precise measurement of mechanical motion or position, while incremental optical encoders are often used to provide this measurement. Incremental encoders are based on the sparkling light at the detector, through turntables containing alternating transmissive and non-transmissive “slits”