| 摘要 |
<p>The sensor (1) has input portion for receiving signals from an external signal generator, and switches detected signal from passive state to active state. After elapse of activation time period, an output signal of sensor is changed corresponding to a signal produced when the sensor triggers a switching operation upon detection of object (5). After detection of the withdrawal of the test signal, the output signal of output unit (12) is switched back to initial state. The signal after change is output to external signal transmitter, according to signal sequence in monitoring state.</p> |
