Basic Principles And Key Types Of Photoelectric Sensors

The photoelectric sensor sends the "light" of the visible light source and infrared sensor according to the signal transmitter, and according to the signal receiver, detects the light from the reflection surface of the test block or the amount of light that is blocked, and then obtains the output data signal. The basic principle of the photoelectric sensor: it is illuminated by the illuminating components of the signal transmitter, and reception is carried out according to the light receiving components of the signal receiver.

Key types of photoelectric sensors: Reflective surface type: place the luminous components and light receiving components in a controller amplifier. Accept the refracted light from the test block. Pass-through type: The signal transmitter/signal receiver is in a separate situation. If a test block is placed between the signal transmitter/signal receiver, the light of the signal transmitter will be blocked.

Return to the reflective surface type: Place the luminous components and the light receiving components in a controller amplifier. Accept the refracted light from the test block.

The light of the bright component will develop the reflective surface according to the reflector, and carry out the reception according to the light receiving component. If you enter the inspection block, it will be blocked.

Narrow light reflecting surface type: Carry out the direct light spot on the inspection block, and carry out the inspection after receiving the refracted light from the inspection block.・Can test small and medium-sized overall targets.・The logo can be checked.・It can be inspected from the beginning of the gap between machinery and equipment.・Visibility of detection points.

Restricted reflection surface type: Select the structure with the signal transmitter and signal receiver as the viewing angle, and only inspect the restricted area where the optical axis is crossed.・The background image is less harmful.・Short hysteresis spacing.・Small bumps can be tested.

The spacing setting of the photoelectric sensor: illuminate the inspection object with a light spot, and carry out inspection based on the difference in viewing angle of the refracted light from the inspection object.・It will not be harmed by background images with high transmittance.・Even if the color tone of the inspection block is different from the transmittance of the material, a smooth inspection can be performed.・High-precision inspection of small objects can be carried out.