DEVICE FOR DETECTING OBSTACLES FOR A MOTORISED GATE OR THE LIKE

摘要

A device for detecting obstacles for a motorised gate or the like comprising at least two pairs (10, 11, 12, 13) of units for transmitting and receiving infrared signals (respectively (16) and (17)), arranged at the outer sides of the access passage (1) controlled by the gate (2) or the like signalling to the control unit of the actuator (3) of the gate the obstruction by an obstacle of said signal; said device provides that the transmitter unit (12) and the receiver (13) can be configured to emit and receive an infrared signal at at least two pulse frequencies. ( Fig 1 ).