Photoelectric switch how to adjust the distance
Photoelectric switch induction distance adjustment method:
1. increase the intensity of the light source, can increase the induction distance;
2. improve the sensitivity of the induction device, the same effect can be achieved.
Photoelectric switch working principle:
1. The modulated pulse generated by the oscillation circuit after the reflection circuit, and then the digital integral photoelectric switch or RC integral way to exclude interference, and finally by delayed (or not delayed) trigger driver output photoelectric switch control signal.
2. Using optical components, the light beam is made to change in the middle of the propagation medium; the light beam is used to reflect the object; the light beam is made to return instantly after a long distance of emission. Photoelectric switch is composed of three parts: emitter, receiver and detection circuit. The emitter is aimed at the target to launch the beam, and the emitted beam is generally derived from light-emitting diodes (LEDs) and laser diodes.
3. The beam is emitted uninterruptedly, or the pulse width is varied. The radiation intensity of the beam modulated by the pulse is selected several times in the emission towards the target without indirect operation. The receiver has a photodiode or phototransistor 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 apply the signal.
4, the modulated pulse generated by the oscillation circuit after the reflection circuit, the light pulse radiated by the light emitting tube GL. When the object under test enters the range of action of the light receiver, the light pulse reflected back into the photosensitive triode DU.
5. photoelectric switch and in the receiving circuit will demodulate the light pulse into an electrical pulse signal, and then amplified by the amplifier and synchronous selective shaping, and then use digital integration or RC integration to exclude interference, and finally by delayed (or not delayed) trigger driver output photoelectric switch control signal.
6. photoelectric switch generally has good return characteristics, so even if the detected object shakes in a small range will not affect the output state of the driver, so that it can be kept in a stable working area. At the same time, the self-diagnostic system can also display the lighted state and stable working area, in order to monitor the work of the photoelectric switch at any time.
All the information in the above article is to explain how to adjust the distance of the photoelectric switch and the photoelectric switch working principle is how the content, hope to be able to provide you with some help.