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光电开关;它是利用被检测物对光束的遮挡或反射

网址:www.coron.com.cn  2019-07-20  作者:admin    阅读:

光电开关;它是利用被检测物对光束的遮挡或反射,由同步回路接通电路,从而检测物体的有无。物体不限于金属,所有能反射光线(或者对光线有遮挡作用)的物体均可以被检测。光电开关有漫反射型,对射型等等,漫反射只需要一个传感器即可完成发射接收,而对射型需要两个传感器,一个发射一个接收。
Photoelectric switch: It uses the occlusion or reflection of the detected object to the light beam, and the circuit is connected by the synchronous circuit to detect the presence or absence of the object. Objects are not limited to metals, and all objects that reflect (or block) light can be detected. Photoelectric switch has diffuse reflection type, counter-radiation type and so on, diffuse reflection only needs one sensor to complete the transmission and reception, while the counter-radiation type needs two sensors, one transmitter and one receiver.
光电开关也有NPN和PNP型号,但除此之外光电开关也有干结点的,即可以接任意一种PLC。
Photoelectric switches also have NPN and PNP models, but in addition, photoelectric switches also have dry nodes, that is, they can be connected to any kind of PLC.

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