Classification of photoelectric sensors

How many classifications of photoelectric sensors are there?

With the progress of science and technology and the popularity of intelligence, the photoelectric sensor's also gradually developed. In this rapidly developing society of science and technology, photoelectric sensors have started to be widely recognized and used by people with their high quality characteristics. Now we introduce the photoelectric sensor, and its classification of photoelectric sensor composition.

Photoelectric sensor is a sensor that uses photoelectric element as a detection element. It first converts the measured change into a change in the optical signal, and then further converts the optical signal into an electrical signal with the help of the photoelectric element.
Its classification has the following kinds:

(1) Slot type photoelectric sensor

Put a light emitter and a receiver face to face in a slot on both sides of the is slot type photoelectric. The emitter can send out infrared light or visible light, in the case of unimpeded light receiver can receive light. When the detected object passes through the groove place, the light will be kept off and the photoelectric switch will start to operate. A switching control signal is output to cut off or turn on the load current, thus completing a control action. The detected distance of slot switches is generally only a few centimeters because constrained by structure.

(2) Through-beam type photoelectric sensor

If the light emitter and the light receiver are separated, it can make the detection distance increased. By a light emitter and a light receiver composed of photoelectric switch is called the pair of separate photoelectric switch, referred to as the pair of photoelectric switch. Its sensing-distance can reach several meters or even tens of meters When using the light emitter and light receiver are installed in the detected objects through both sides of the path, detected objects through when blocking the light path, light receiver on the action output a switch control signal.

(3) Reflective type photoelectric sensor

Light emitter and light receiver into the same device, in front of it installed a reflector, the use of reflection principle to complete the role of photoelectric control called reflector reflection type (or reflector reflection type) photoelectric switch. Under normal circumstances, the light emitted from the luminaire is reflected back by the reflector is received by the light receiver; once the light path is blocked by the detection object, the light receiver can not receive light, photoelectric switch action, the output of a switch control signal.

(4) Diffuse reflective type photoelectric sensor

Its detected head is equipped with a light

 emitter and a light receiver, but there is no reflector in the place ahead. Under normal circumstances, the light emitted by the luminaire light receiver is not found. When the detected object When the detected object is kept off the light when it passes through, and reflects the light back, the receiver receives the light signal and then outputs a switch signal.