| 摘要 |
<p>The system has a distal blade (11) with a detection unit (15) that transmits a detection signal to a control unit (14) when the distal blade acts as an object for carrying out the acceleration and the deceleration in a displacement direction of a roller curtain (1). The amplitude of the acceleration and the deceleration is higher than a threshold value. An alarm (17) activates its alarm buzzer (17b) when the distal blade is in a predetermined total or partial closing position, such that the detection unit emits the detection signal.</p> |
