ROTOSCAN RS4-4

Functional Principle

Laser-scanners are optoelectronic devices that continuously monitor a surface, much like a radar system does. They use the diffuse light reflected by the surface of non-transparent objects which are located in their working range. If an object (person or obstacle) is detected in the working range, the device calculates its precise coordinates with regard to distance, size and position based on the travel time of the reflected light and the position of the object in the sector range. At the same time the device checks whether the detected object is located inside or outside a previously defined protection field.

Configuration and Measurement Principle

Light impulses from a laser diode are directed across the 190° scanning area with the help of a rotating mirror. The pulsed travel time procedure, serves as the measurement principle. The distance to a specific light-reflecting object is calculated based on the time difference between the transmittal and reception of a light impulse. The evaluation is virtually independent of the remission of the scanned object.