Automatic garage door system, has transmitter changing from secondary energy-saving state to principal state and sending signal to receiver, and blocking unit blocking movement of door if receiver does not receive signals within time

摘要

The system has a radio frequency transmitter (3) for transmitting a state of a pressure sensor or safety strip (2) located at a moving end of an automatic door (1) to a fixed radio frequency receiver (4) that is connected to a motor control device. The receiver sends a command signal to the transmitter according to the sensor state so that the transmitter changes from a secondary energy-saving state to a principal state and sends a check signal to the receiver. A blocking unit blocks movement of the door if the receiver does not receive the check signals within a predetermined time. An independent claim is also included for a process for operating an automatic door system.