这些机械传感器经常是测速发电机或者编码器。
详细论述了基于光电编码器的高精度的数字测速方法，及其在转台伺服系统中的实现。
High Accuracy digital speed measurement methods based on optical encoder were discussed in detail. Then it introduces the realization of this methods in the servo system.
鲍默夜蛾，柏林实现，通过ATEX 2002年9月95和正在提供增量编码器和测速发电机，以满足atex指令。
Baumer hubner, Berlin, achieved ATEX 95 in September 2002 and is offering incremental encoders and tacho generators that fulfill the ATEX directive.
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