Light Curtains
What is a light grid?
Light grids monitor a clearly defined control area using multiple infrared light beams that are invisible to the human eye.Safety Light Grid Systemsconsist of a transmit and a receiving unit. A two-dimensional surveillance area forms in between. The principle is relatively simple. But there are many specialized types that are designed for very different applications.
How does a light grid system work?
TheLight Grid Systemsconsist of a sender and a receiver bar. The transmitter and receiver are therefore in two housings, which are separated from each other. In principle, they connect several disposable light barriers together. An infrared beam of light emanates from the transmitter. It is taken up by the receiver’s optics. A safety module evaluates the signal. The light grid recognizes when the light beam is interrupted.
What variants are there?
There are essentially two variants: either the output signals are directly linked to each other. Then one speaks of a switchinglight grid. Or they are evaluated individually, then the system is called the measuring light grid. Depending on the type of safety light grid, the electronics for evaluation are either integrated in the light grid strip or it works in a separate housing as an external amplifier.
How are light grids used in practice?
Light grids can be used as optoelectronic safety devices to secure access areas or possible danger points. They are often integrated into the safety concept of a machine or system. For example, they are used on presses or other machines in danger areas or danger zone protection. Depending on the setting, you can ensure the protection of people, their hands or fingers.
What are the advantages of safety light grids?
Until the 1970s, it was still common to secure rooms with a simple light barrier at the ankle height. With a light grid, however, access to a room or, for example, a specific machine, can be secured much more reliably than with a single beam of light. In addition, these systems are usually characterized by a very simple assembly.