一种高可靠性光电开关的实现  

Implementation of A Photoelectric Switch With High Reliability

作　　者：曹晓华[1] 耿世钧[1] 马廷锋[1] 徐建平[1] 

机构地区：[1]河北工业大学测控系,天津300130

出　　处：《自动化仪表》2003年第12期55-56,共2页Process Automation Instrumentation

摘　　要：介绍了一种高可靠性的光电开关电路 ,带有稳频调制光以抗各种干扰 ,具有大功率驱动电路和光电三极管的自动增益控制特性 ,检测电路的输出级带有放大和施密特迟滞特性 ,确保整机的高抗干扰能力。The circuits of a photoelectric switch with high reliablility are introduced. For obtaining anti-interference capability to different interference the switch is adopting stable frequency modulation light. High power drive circuit and characteristic of automatic gain control of the photoelectric triode bring the output stage of detecting circuit with amplifying and Schmitt hysteresis feature. Thus the integrated switch unit offers high anti-interference capability. Key words Photoelectric switch Automatic Gain Control Self-offset

关 键 词：光电开关 自动增益控制 自偏置 可靠性 光电传感器 测控系统 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置] TN2[自动化与计算机技术—控制科学与工程]