论文部分内容阅读
一、系统的构成图1为西德慕尼克交流调速电梯的微型计算机控制系统的功能框图。总共有五个输入信号:电动机速度、应急驱动系统和来自时间选择、召唤单元、故障显示的指令信号。其执行过程分别叙述如下。速度编码器测速发电机用以检测电动机速度,经过速模-数转换器、编码器的输出脉冲被输入施密特触发器以产生脉冲列被送入周期检测单元(见图2)。周期检测单元检测速度采用测量施密特触发器产生的脉冲列周期的方法,而脉冲列的频率与测速发电机有关,直接比例于测速发电机检测电动机的速度。这种方法中数据的采集时间是很快的。图3示出周期检测
First, the system structure Figure 1 for the West German exchange speed control elevator microcomputer control system block diagram. There are a total of five input signals: motor speed, emergency drive system and command signals from time selection, summoner unit, fault display. The implementation process is described below. Speed Encoder The tachogenerator is used to detect the motor speed. After passing through the speed analog-to-digital converter, the encoder output pulse is input to the Schmitt trigger to generate a pulse train which is sent to the period detection unit (see Figure 2). The detection speed of the cycle detection unit adopts the method of measuring the cycle of the pulse train generated by the Schmitt trigger. The frequency of the pulse train is related to the speed-measuring generator, and is directly proportional to the speed of the speed-measuring generator for detecting the motor. This method of data collection time is fast. Figure 3 shows period detection