发明名称 |
PROCEDE DE SURVEILLANCE ET DETECTEUR OPTO-ELECTRONIQUE |
摘要 |
<p>An optoelectronic sensor and a method for producing a positive or a negative object detection signal in dependence on the presence or non-presence of an object in a foreground region or in a background region of a region monitored by the sensor. Transmitted light is transmitted in the direction of the monitored region during an operating phase. A plurality of received signals are produced in dependence on the reflected and the received transmitted light which are associated with the foreground region or with the background region. A difference of the received signals is compared with a differential threshold to produce the positive or the negative object detection signal, wherein a switching hysteresis is formed for a change between the positive and the negative object detection signal. The association of the received signals with the foreground region and the background region is changed in dependence on a change in the object detection signal to form the switching hysteresis.</p> |
申请公布号 |
FR2830622(B1) |
申请公布日期 |
2004.10.15 |
申请号 |
FR20020009926 |
申请日期 |
2002.08.05 |
申请人 |
SICK AG |
发明人 |
WASLOWSKI KAI;MERETTIG GERHARD;FINGWALD SIEGFRIED |
分类号 |
G01V8/20;(IPC1-7):G01S17/50 |
主分类号 |
G01V8/20 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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