| 摘要 |
A system (20) for the detection of an obstruction in the path of a closing window (14) which is movable by an electric motor (16) and which has an edge (18) receivable in a portion (10) of a window frame (12) on closing of the window, the system comprising a high frequency transmitter (22) positionable at one end (28) of the portion of the window frame for transmitting a high frequency signal along the portion of the window frame; a high frequency receiver (24) positionable at the other end (30) of the portion of the window frame for receiving the high frequency signal transmitted along the portion of the window frame by the transmitter; and a control unit (26) for monitoring the high frequency signal received by the receiver, the control unit being connectable to the electric motor to control the operation of the motor dependent on the signal received by the receiver. <IMAGE> |
