Infrared Photoelectric Switch

The important function of the infrared photoelectric switch is to be able to deal with the change of light intensity: use optical elements to change the light beam in the middle of the propagation medium; use the light beam to reflect the object; make the light beam return instantaneously after a long distance. The infrared photoelectric switch is composed of three parts: transmitter, receiver and detection circuit. The transmitter is aimed at the target and emits a light beam, and the emitted light beam generally comes from a light emitting diode (LED) and a laser diode.

Detection distance: The movement distance refers to the spatial distance from the reference position (sensing surface of the photoelectric switch) to the reference position measured when the switch is in motion to the detection surface when the detection body moves in a certain way. The rated operating distance refers to the nominal value of the operating distance of the proximity switch.

Surface reflectance: For the light emitted by the diffuse reflection photoelectric switch, enough light needs to be reflected back to the receiver of the diffuse reflection switch from the surface of the detected object, so the detection distance and the surface reflectance of the detected object will determine the light received by the receiver The intensity of the light reflected by the rough surface will be less than the intensity reflected by the smooth surface, and the surface of the object to be detected must be perpendicular to the light emitted by the photoelectric switch.

Output status: Normally open and normally closed. When there is no detecting object, the load connected by the normally open photoelectric switch will not work due to the cut-off of the output transistor inside the photoelectric switch. When an object is detected, the transistor is turned on and the load is energized to work.

Infrared photoelectric switches can be used in various applications. When using infrared photoelectric switches, attention should be paid to environmental conditions so that the infrared photoelectric switches can work normally and reliably.