Through-beam light barrier
How does a light barrier basically work?
The construction of a light barrier is relatively easy. The optical transmitter is powered and transmits its light to a phototransistor. When the receiver receives the light, it becomes conductive. Then a current flows. The signal can be received and evaluated at the detector. If the phototransistor does not receive light, no current flows.
What is a through-beam light barrier?
A through-beam light barrier forms an optical barrier by means of a light beam generated by an optical transmitter. An optical receiver receives and detects the light beam. In the relatively simple construction of the through-beam light barrier, the transmitter and receiver lie opposite each other at the respective end of the beam.
What does that mean in practice?
If a person or an object enters the beam of light, the beam is interrupted. That is, the receiver voltage is reduced. A detector on the receiver now triggers an electrical signal. This can be an alarm, for example.
A through-beam light barrier Has a range of up to 80 meters. This means that it has a longer range than other light barrier designs.
Where is a through-beam sensor used?
The through-beam sensor can be used as a limit protection. For example, it can monitor access to a building or door.
This can ensure security in the context of an alarm system, for example by preventing unauthorized persons from entering. For example, the through-beam photocell can prevent break-ins.
What does the through-beam sensor do in industry?
A through-beam sensor However, it is also used in industry, for example in parts recognition in automotive production. In mechanical engineering, for example, you can take on sorting tasks.
Light barriers are a decisive factor in the automation of industrial production.
What does this look like in practice?
Through-beam photoelectric barriers can be used, among other things, in the form of fork light barriers be built. For example, the speed of motors can be measured with a fork light barrier. This shape is widely used in electronics. The fork light barrier is able to reliably detect even the fastest movement sequences.