德国西克-智能传感器专家-- SICK专注于为物流自动化、工厂自动化和过程自动化提供日益智能化的传感器件和整体解决方案。
光电开关（光电传感器）是光电接近开关的简称，它是利用被检测物对光束的遮挡或反射，由同步回路选通电路，从而检测物体有无的。物体不限于金属，所有能反射光线的物体均可被检测。光电开关将输入电流在发射器上转换为光信号射出，接收器再根据接收到的光线的强弱或有无对目标物体进行探测。安防系统中常见的光电开关烟雾报警器，工业中经常用它来记数机械臂的运动次数。
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