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新干线电动车组原采用的空转、滑行检测装置(见图1),车轴速度检测采用交流发电机,信号变换采用整流器,比较演算采用磁放大器。这种装置的速度差检测灵敏度为25%,微分检测灵敏度为30公里/小时/秒,对防止误动作,检测灵敏度受到限制。因此在第一、二次车新制360台更换用车辆时,对空转、滑行检测装置作了改进,于76年2月作了试制样品的线路运行试验。
Shinkansen electric unit original idling, taxiing detection device (see Figure 1), the axle speed detection using alternator, signal converter using the rectifier, compare the calculation using a magnetic amplifier. This device speed differential detection sensitivity of 25%, differential detection sensitivity of 30 km / h / s, to prevent malfunction, detection sensitivity is limited. Therefore, when the first and second vehicles were to be replaced with 360 new vehicles, the test device for idling and taxiing was improved. In February 76, the trial operation of the prototypes was carried out.