“自检扫描光线反射式安全防护装置”于1987年11月中旬通过部级鉴定.鉴定会认为,该装置设计思想严谨,电路及光路设计先进合理,样机灵敏度高,适应范围广,性能稳定可靠,抗干扰能力强,具有良好的自检功能,对光容易,安装维修方便.同时,该研制项目吸 “Self-scanning scanning light-reflective safety protection device ” passed the ministry-level appraisal in mid-November 1987. The appraisal will think that the device has a rigorous design concept, advanced and reasonable circuit and light path design, high prototype sensitivity, wide adaptability and performance Stable and reliable, anti-interference ability, with good self-test function, easy to light, easy installation and maintenance.At the same time, the research project to absorb