| 摘要 |
<p>The method involves adjusting transmitting power of a transmitting unit (12) i.e. LED, and/or a receiving side evaluation threshold, and transmitting a code by the unit, where the code indicates correlated sequence of light pulses. The light pulse is emitted as light beam (22) by the unit when the unit is controlled by a control and evaluation electronic unit (18). The light pulse is emitted by the unit with an opening angle of 10 degrees, and signals received from a receiving unit (14) is evaluated for detecting light beam emitted by the transmitting unit. An independent claim is also included for an opto-electronic sensor comprising a transmitting unit.</p> |
