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近年生产的ＤＦ4 型机车都采用光电式速度传感器代替测速交流电机。Ⅱ轴光电式传感器的速度信号供列车监控记录装置 ,Ⅴ轴光电式传感器的速度信号供机车双针速度表、励磁调节器、轮缘涂油器。光电式传感器与测速电机比较有以下几个特点 :①精确度较高 ;②密封性和抗震动性好 ;
In recent years, the production of DF4 locomotives are used photoelectric speed sensor instead of speed AC motor. Ⅱ axis photoelectric sensor speed signal for train monitoring and recording devices, Ⅴ-axis photoelectric sensor speed signal for locomotive double needle speedometer, excitation regulator, wheel flange oiler. Photoelectric sensors and speed compared to the motor has the following characteristics: ① higher accuracy; ② sealing and anti-vibration is good;