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一般的数字测速装置,大致由转速传感器、模数转换电路、计数显示器等部分组成。其中,转速传感器是一很关键的环节,传感器采用测速发电机或其它方法,模数转换电路复杂。采用光电信号虽简单易行,但在多尘、振动大等环境下工作,可靠性较差。我厂离心机数控装置原来采用光电测速。电机重载后,振动很大,和电机同轴安装的光电盘旁的集光灯随之抖动,使光电信号与实际转速产生偏差。同时,集光灯使用久后,会使照度降低而影响光
The general digital speed measuring device is roughly composed of a rotational speed sensor, an analog-to-digital conversion circuit, and a count display. Among them, the rotational speed sensor is a very crucial link, the sensor uses the speed generator or other methods, the analog-to-digital conversion circuit is complicated. The use of photoelectric signals is simple and easy, but it works in environments where there is a lot of dust and vibration, and the reliability is poor. Our factory centrifuge numerical control device originally used photoelectric speed. After the motor is overloaded, the vibration is great, and the light set next to the photoelectric disk installed on the coaxial side of the motor is shaken, causing the photoelectric signal to deviate from the actual rotation speed. At the same time, after a long period of use of the spotlight, it will reduce the illumination and affect the light.