Measurement grating, also known as detection light curtain, is a special photoelectric sensor mainly used for detecting and measuring whether the product meets the specified requirements. Like ordinary opposed photoelectric sensors, it includes two parts: a transmitter and a receiver that are separated from each other and placed relative to each other. But its overall size is relatively large, and it is in the shape of a long tube. The detection and measurement of the detection light generated by the grating emitter is not just a single beam like ordinary photoelectric sensors, but an array of rays is generated at fixed intervals along the length direction, forming a "light curtain". In a scanning manner, combined with the controller and its software, the function of detecting and measuring the external dimensions of the object is achieved.

Measurement method for measuring light curtains

The measurement grating can be set using a simple Windows setup program, which includes analog output, RS485/RS232 communication protocol output, switch output, and scanning analysis methods. For example, the output can be set to

(1) The highest point is obstructed (i.e. the end of a blocked beam);

(2) The lowest point is obstructed (i.e. the first obstructed beam);

(3) Total blocked beam;

(4) The maximum number of continuously occluded beams;

(5) The highest point is not obstructed (i.e. the end of an unobstructed beam);

(6) The lowest point is not obstructed (i.e. the first unobstructed beam);

(7) The total unobstructed beam.