The use of photoelectric sensor precautions and technical indicators

The photoelectric sensor can be used in various applications. When using the photoelectric switch, the environmental conditions should also be paid attention to, so that the photoelectric switch can work normally and reliably.

1) Avoid strong light sources

The photoelectric sensor generally works stably when the ambient illuminance is high. However, it should be avoided that the optical axis of the sensor faces strong light sources such as sunlight and incandescent lamps. When the angle between the optical axis of the sensor (receiver) and the strong light source cannot be changed, a light-shielding plate or a long light-shielding tube can be installed around the sensor.

2) Prevent mutual interference

An effective way to prevent mutual interference is to set the emitter and the receiver crosswise, and open the group distance when there are more than 2 groups. Of course, using models with different frequencies is also a good way.

3) Influence of mirror angle

When the measured object is shiny or encounters a smooth metal surface, the reflectivity is generally very high, which is similar to a mirror surface. At this time, the projector and the detected object should be installed at an angle of 10-20° to make the optical axis It is not perpendicular to the detected object to prevent malfunction.

4) Eliminate the influence of background objects

When using a reflective diffuser, sometimes the detected object is close to the background, and the photoelectric sensor or the background is smooth and other objects with high reflectivity, which may make the photoelectric switch unable to detect stably. Therefore, you can switch to distance-limited projectors and receivers, or use methods such as staying away from the background object, removing the background object, painting the background object in matte black, or trying to make the background object rough and dark.