Photoelectric sensor mainly has the following kinds:
1) slot photoelectric sensor
A light emitter and a receiver face to face in a slot on both sides of the composition of the slot photoelectric. The emitter can emit infrared light or visible light, and the light receiver can receive light under unimpeded conditions. But when the detected object from the slot through, the light is blocked, photoelectric switch will act, output a switch control signal, cut off or turn on the load current, thus completing a control action. The detection distance of the slot switch is generally only a few centimeters because of the limitations of the overall structure.
(2) the opposite-type photoelectric sensors, if the light emitter and light collector separated from the detection distance can be increased, a light emitter and a light collector to form a separate photoelectric switch, referred to as the opposite-type photoelectric switch. The detection distance of the butt-emitting photoelectric switch can be up to several meters or even tens of meters. The use of bi-directional photoelectric switch to light emitters and receivers were installed in the detection of objects through the path of the two sides, the detection of objects through the blocking of the light path, the receiver on the action of the output of a switching control signal.
Photoelectric sensors
(3) reflector-type photoelectric switch
The luminous emitter and light collector into the same device, in front of a reflector, the use of the principle of reflection to complete the role of photoelectric control, known as the reflector reflective (or reflector reflective) photoelectric switch. Under normal circumstances, the light emitted by the luminous emitter is reflected back by the reflector and then received by the receiver; once the detected object blocking the light path, the receiver can not receive light, photoelectric switch action, the output of a switch control signal.
(4) diffuse reflective photoelectric switch
Diffuse reflective photoelectric switch detection head is also equipped with a luminescent device and a light receiver, but diffuse reflective photoelectric switch in front of no reflector. Under normal circumstances the light emitted by the emitter light receiver can not be found. In the detection, when the detection of the object passes through the blocking of light, and the light partially reflected back, the photoreceiver receives the light signal, the output of a switch signal.
What is a photoelectric sensor What are the types of sensors1. A photoelectric sensor is a device that detects the distance and presence of an object through the use of an optical transmitter (usually an infrared transmitter) and an optoelectronic receiver. Photoelectric sensors are widely used in industrial manufacturing. There are three common types of photoelectric sensors: counter (transmissive), reflective, and proximity detection (diffuse).
2, what are the types of sensors
(1) laser, using the technology of the laser for measuring devices. It is composed of a laser, a laser detector and a measurement circuit. It is a new type of measuring instrument, which has the advantage of being able to realize non-contact remote measurement, with the advantages of fast speed, high accuracy, strong light resistance and anti-interference ability.
(2) Resistive, which is a device that converts the measured physical quantities such as displacement, deformation, force, acceleration, humidity, temperature, etc. into resistance values.
What is the principle of photoelectric sensors?Calculate how much your home renovation will cost
Photoelectric sensor is a sensor that uses a photoelectric element as a detection element. It first converts the measured change into a change in the light signal, and then further converts the light signal into an electrical signal with the help of the photoelectric element. Photoelectric sensor is generally composed of three parts: light source, optical path and photoelectric element. The principle of photoelectric sensor is to realize the control by converting the change of light intensity into the change of electric signal. Photoelectric sensors in general, there are three components, they are divided into: transmitter, receiver and detection circuit. The transmitter emits a beam of light aimed at a target, and the emitted beam generally originates from semiconductor light sources, light emitting diodes (LEDs), laser diodes and infrared emitting diodes. The beam is emitted uninterruptedly or the pulse width is varied. The receiver has a photodiode, phototransistor, photocell composition. In front of the receiver, there are optical elements such as lenses and apertures. Behind it is the detection circuit, which filters out the effective signal and applies that signal. In addition, there are transmitter plates and optical fibers in the structural elements of the photoelectric switch.
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