在机械量(如线速度、角速度、扭矩和流量等)的测量中,经常使用光电脉冲式传感器或磁电脉冲式传感器。这种传感器使用方便,测量线路简单,受环境(如温度、噪声、分布电容或接触电势等)影响小。这类传感器的输出是一系列疏密随被测信号大小变化的脉冲信号,这样,给动态数据处理带来不便。例如要测量某一机械转速的变化过程,需要对每两个脉冲之间的时间间隔进行计算,然后,逐点描出过程曲线,这样人工处理数据的工作量非常大。如使用计算机处理这类信号,又无法直接采样,若用计算机的时控输出作为时间闸门, In mechanical quantities (such as linear velocity, angular velocity, torque and flow, etc.) measurements, often using optical pulse sensor or magnetoelectric pulse sensor. This sensor is easy to use, the measurement circuit is simple and is less affected by the environment (such as temperature, noise, distributed capacitance or contact potential, etc.). The output of this type of sensor is a series of pulse signals that vary in density with the size of the signal being measured, thus causing inconvenience to dynamic data processing. For example, to measure the change of speed of a certain machine, the time interval between every two pulses needs to be calculated. Then, the process curve is plotted point by point, so the work of manually processing the data is very heavy. Such as the use of computers to deal with such signals, and can not be directly sampled, if the computer’s time control output as a time gate,