公开(公告)号：KR1020020034690A

公开(公告)日：2002-05-09

申请号：KR1020000065155

申请日：2000-11-03

Applicant: 한국철도기술연구원

Inventor： 김길동 ,  박현준 ,  최성규 ,  백종현

IPC: B60L15/20

CPC classification number: Y02T10/7275

Abstract: PURPOSE: A speed detecting apparatus for a railroad vehicle is provided to simplify a circuit, reduce manufacture cost, and detect accurately acceleration and deceleration of the railroad vehicle. CONSTITUTION: A speed detecting apparatus for a railroad vehicle comprises an encoder input circuit, a voltage comparator and a TTL level converter. The encoder input circuit applies a real speed of a motor to a controller in the vehicle for detecting speed change during acceleration and deceleration of the railroad vehicle. The encoder input circuit includes a filter circuit having a resistor and a capacitor for minimizing noise due to rotation of the motor in the vehicle, and a limit circuit having a diode for limiting an input voltage to stabilize an output voltage even when the speed increases. The voltage comparator normalizes the filtered signal. The TTL level converter converts the normalized output to a TTL level.

Abstract translation: 目的：提供一种用于铁路车辆的速度检测装置，以简化电路，降低制造成本，并准确地检测铁路车辆的加速和减速。 构成：用于铁路车辆的速度检测装置包括编码器输入电路，电压比较器和TTL电平转换器。 编码器输入电路将车辆的实际速度应用于车辆的控制器，以检测铁路车辆的加速和减速期间的变速。 编码器输入电路包括具有电阻器和电容器的滤波器电路，该电容器用于使车辆中的电动机的旋转最小化噪声;以及限制电路，其具有用于限制输入电压以稳定输出电压的二极管，即使当速度增加时也是如此。 电压比较器对滤波后的信号进行归一化。 TTL电平转换器将归一化输出转换为TTL电平。