基于单片机和光电开关的通用计数器设计

Design of General Counter Based on Photoelectric Switch and Single-chip Microcomputer

目前光电开关在工业自动化设备中的运用越来越广泛,介绍的通用计数器使用红外光电开关作为检测元件,当有工件通过时,红外光被遮挡,光电开关会产生相应的脉冲信号,通过对脉冲信号进行计数,可以实现对工件的自动计数;该设计方法采用模块化设计方法,分为电源模块、光电转换模块、光耦隔离电路模块、断电保护模块、矩阵键盘模块、计数模块及显示模块;主要采用51单片机对各个模块进行控制,用keilC51软件进行程序设计,用Proteus软件对其进行仿真,最后通过实际搭建电路,实现准确地计数,证实该设计方案是可行的。

At presrent,the photoelectric switch is more and more widely used in the industrial automation equipment.The general counter uses the infrared photoelectric switch as detecting element.When a workpiece goes through the infrared photoelectric switch,and blocked,the infrared photoelectric switch will produce the corresponding pulse signal.By counting the pulse signal,we can realize automatic counting of workpiece.This design uses the modular design method,including power-supply module,photoelectric conversion module,optocoupler isolation circuit module,power off protection module,matrix keyboard module,counting module and display module.It mainly uses 51 single-chip microcomputer to control the system,uses the keilC51 software to design program,uses the Proteus software to complete the simulation.Finally,through the actual circuit structures,the accurate count can be done.It certifies that the programme is possible.