| 摘要 |
<p>The sensor has a light transmitter (10) including a LED (16) and transmitting a light signal (xt) to a monitoring region. A light receiver receives transmitted light signal. The transmitter and the receiver are received on a side of the monitoring region. A light signal generating unit generates the light signal based on an output signal (14), which is spread by a frequency spread process and loaded with an offset (Pdc) for generating unipolar signals. A control and evaluation unit generates an object identification signal depending on the output signal.</p> |
