窄脉冲调理及光路同步识别的安全光幕电路  

Safety Light Curtains Circuitry Based on Narrow Pulse Conditioning and Optical Path Synchronous Identification

作　　者：凌秀泽[1] 孔逸敏[1] 徐寅林[1] 

机构地区：[1]南京师范大学物理科学与技术学院,江苏南京210046

出　　处：《自动化仪表》2012年第10期46-48,52,共4页Process Automation Instrumentation

基　　金：企业委托技术开发基金资助项目(编号:2011XYL01)

摘　　要：在现代化生产过程中,人机交互十分频繁,保障作业人员安全的电路系统显得十分重要,由此,提出了一种新型的红外安全光幕电路。针对光幕电路中红外光线远距离、高抗干扰的工作要求,提出了大电流窄脉冲调理的方案,并且巧妙地利用收发两模块之间信号的逻辑关系,实现了光路的同步识别。实测结果表明该安全光幕电路完全满足光电安全保护的需要,具有较强的实用价值,应用前景良好。In modem productive process, human-machine interaction is frequent. The circuitry system that protecting the safety of operators is very important, thus a new type of infrared safety light curtains circuitry is proposed. In accordance with the operational requirements of long distance and strong anti-interference for infrared light in the circuitry, the scheme based on large current narrow pulse conditioning is put forward. In addition, the logical relationship between the two modules of receiving and sending is used ingeniously for implementing synchronous identification of the optical path. The results of practical measurement show that the safety light curtains circuitry has fully met the needs of photoelectric security; the design possesses strong practical value and application prospect.

关 键 词：窄脉冲 红外检测 时序译码 脉冲分频 光路同步识别 安全光幕 

分 类 号：TP277[自动化与计算机技术—检测技术与自动化装置]