Photoelectric sensor:
The photoelectric sensor emits "light" such as a visible light ray and an invisible light ray through an emitter, and detects a change in the amount of light reflected by a detection object or blocked by a receiver, thereby obtaining an output signal.
Reflective photoelectric sensor
The light-emitting element and the light-receiving element are incorporated in one sensor amplifier and receive reflected light from a detection object.
The advantage is that it is easy to install, and the disadvantage is that it is easily affected by the surface state of the detected object. If the object to be detected has poor light reflection, such as a dark object, false detection may occur; if there is a background with strong light reflection behind the object to be detected, it is likely to be disturbed by the background to produce false detection.
transmission type photoelectric sensor
The transmitter/receiver is in a separated state. If a detection object is placed between the transmitter/receiver, the light of the transmitter will be blocked.
The advantage is that the detection is stable and is not affected by the surface state of the product; the disadvantage is that the installation is inconvenient, and the installation position of the receiver must be considered.
Regressive reflective photoelectric sensor
The light emitting element and the light receiving element are incorporated in the sensor amplifier, and receive the reflected light from the detection object.
The light of the light emitting element is reflected by the reflecting plate and received by the light receiving element, and if it enters the detection object, it will be blocked.
Mirror reflection has the advantages of reflection type and opposite type, easy to install, but also not affected by the state of the product, transparent objects can also be detected.
The above is the relevant classification of photoelectric sensors. For more sensor knowledge, please look forward to the next related tweets to show you more sensors.
