光电传感器是采用光电元件作为检测元件,首先把被测物的变化转变为信号的变化,然后借助光电元件进一步将光信号转换成电信号。光电传感器主要由光源、光学通路和光电元件3部分组成。其具有检测精度高、响应速度快、非接触检测、检测模式丰富、体积小巧等优点。因而近年来被广泛 Photoelectric sensor is the use of optoelectronic components as detection components, first of all changes in the measured object into a signal change, and then use the optoelectronic components further optical signals into electrical signals. Photoelectric sensor mainly by the light source, optical access and optoelectronic components 3 parts. It has high detection accuracy, fast response, non-contact detection, detection mode is rich, small size and so on. It has been widely used in recent years