Photoelectric sensor emits visible light and infrared light through the transmitter, and then through the receiver to detect the light reflected by the detection object or blocked light changes, so as to obtain the output signal.
Principles and main types
It is illuminated by the light-emitting element of the transmitter and received by the light-receiving element of the receiver.
Diffuse Reflection
The light emitting element and light receiving element are built into a sensor
In the amplifier. Receive the reflected light from the detected object.
Through Beam
Emitter/Receiver is in separation state. If at launch A detection object is placed between the transmitter/receiver, then the transmitter's
The light will be blocked.
Retro Reflection
The light emitting element and light receiving element are built into a sensor .In the amplifier. Receive the reflected light from the detected object.The light from the light-emitting element is reflected through the reflector, and Receive through an optical receiving element.If you enter the detection object, it will be blocked
Characteristic
Non-contact detection
Detection can be done without contact, so it will not scratch the detection object, nor damage.The sensor itself extends its service life and eliminates the need for maintenance.
Can detect a variety of objects
It can detect a variety of objects by the amount of surface reflection or shading
(Glass, metal, plastic, wood, liquid, etc.)
Detection distance length
High power photoelectric sensor for long distance detection.
TYPE
Diffuse Reflection
Retro Reflection
The object is detected by detecting the light returned by the reflector after the sensor is emitted.
• As a single side reflector, it can be installed in small Spaces.
• Simple wiring, compared with reflective type, long distance detection.
• Optical axis adjustment is very easy.
• Even if it is opaque, it can be directly detected regardless of shape, color or material.
Background suppression
The light spot is shone on the detected object and through the Angle difference of light reflected from the detected object Test.
• Less susceptible to background material with high reflectivity.
• Stability detection can be performed even if the color of the detected object and the reflectivity of the material are different.
• High precision detection of small objects.
Laser Through Beam and Diffuse reflection
Reflective type for glossiness discrimination
Post time: Jan-31-2023