电梯缓冲器复位时间测试仪的传感器电路设计

在检验电梯时,一般情况下检验人员都是用人眼来判断缓冲器复位时间的,这时都需要检测人员蹲在电梯轿厢坑底,这样对检验人员来说环境是很差的,而且又是很危险,检测结果也是很不准确的。本文就介绍一实用方便的电梯缓冲器测试仪传感器的电路,它利用光电开关来检测轿厢和缓冲器脱离信号,进而得到触发电压,并且通过外接555斯密特触发器来转换电平,然后通过接口把信号送进微处理器来判断缓冲器复位时间。

The Design of Sensor Circuit for Elevator Buffer's Reset Time Tester

When elevator is inspected the inspector used to employ eye examination to determine the buffer reset time,and in this case the inspector has to squat at the bottom of the elevator's pit where the environment is very poor and dangerous,moreover the inspection results are not so exact.This paper describes a practical and convenient sensor circuit for the elevator buffer tester.The sensor circuit uses photoelectric switch to test the detachment signal of the car and buffer,then obtains the trigger voltage,and...