What is a measuring light curtain?
The measuring light curtain sensor is a special photoelectric sensor, which is an electronic device that senses changes in the received light signal. All photoelectric sensors use modulated light to eliminate the possible influence of the surrounding light source. When working, the photoelectric sensor emits light. When the detected object passes by, depending on the detection mode, the object either absorbs light or reflects the light to the photoelectric sensor. In this way, the intensity of the light received by the receiver changes, and the change value triggers the switch signal output to realize the detection function.
The measuring light curtain sensor is the same as the ordinary through-beam photoelectric sensor, which consists of a transmitter and a receiver that are separated from each other and placed opposite each other. However, it has a larger shape and a long tube. The detection light generated by the measuring light curtain transmitter is not only one beam like an ordinary sensor, but a light array is generated at a fixed interval along the length direction to form a "light curtain", which is scanned in a way with the controller and its software. Realize the function of monitoring and measuring the dimensions of objects.
The measuring light curtain system needs to be equipped with a controller to work normally. The controller uses software for programming settings, which can provide multiple scan modes and detection and analysis modes, and can communicate with PLC or computer through a serial interface to transfer control or scan As a result, a trigger signal can also be connected to control the scanning process.
Working principle of measuring light curtain sensor
After the measuring light curtain transmitter and measuring light curtain receiver are energized, the infrared light emitted by the transmitter directly hits the receiver to form a light curtain system. When the target object is placed (or running) in the formed light curtain system, a part of the infrared light will be blocked Make the corresponding receiver unable to receive the corresponding receiving device. The measuring light curtain uses synchronous scanning to identify the blocked light. First, a transmitter channel sends out a light pulse and the corresponding receiver searches for the corresponding pulse at the same time. When it is found, the scanning of one channel is completed, and then it turns to the next channel until all The completion of the channel scanning is a scanning cycle, and in this cycle it is recorded which light is passed and which light is blocked, and a signal is output according to the system.
safety light curtain wiring
The light curtain is composed of a light emitter and a light receiver. When installed, the first beam of the emitter is aligned with the first beam of the receiver... The N beam of the emitter is aligned with the N beam of the receiver , From the cable outlet end is the first beam.
Working voltage DC12V~DC24V
Light emitter: 4-pin aviation plug
pin1: brown +24V (power supply)
pin2: blue 0V (power ground)
pin3: black CP (synchronization signal)
pin4: White OUT PNPNC
pin5: red 485-A
pin6: Green 485-B
pin7: ground wire
Receiver: 6-pin aviation plug
pin1: brown +24V (power supply)
pin2: blue 0v (power ground)
pin3: black CP (synchronization signal)
pin4: White OUT PNPNC
pin5: Red 485——A
pin6: Green 485——B
pin7: ground wire
Description:
1 The CP (black wire) of the emitter Sender and the receiver Receiver are directly connected.
2 Pay attention to the aviation plug when plugging in: This plug is a loose-proof plug and cannot be inserted in place at one time. You need to push the plug in and tighten the nut until the nut is locked when it cannot be pushed.
Hot Tags: measuring light curtain sensors, China, manufacturers, factory, buy, price, cheap, agv safety edge, Edge sensor detects contact, Ultra Slim Safety Light Curtain Type4, 2D Laser Scanner
