Optoelectronic sensor for the detection of pallets

US8324557B2 · kind B2 · utility

Assignee

• SICK AG · DE

Inventors

• Michael Klein · Bielefeld, DE
• Christoph Märkle · Glückstadt, DE
• Bernhard Schindler · Simonswald, DE

Key dates

• Filing date: Feb 5, 2010
• Grant date: Dec 4, 2012
• Expiry date: Apr 17, 2031

Classification

• Technology area (CPC G): Physics
• CPC primary: G01V8/14
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

The invention relates to an optoelectronic sensor having a transmitter (12) for the transmission of transmitted light (22), a receiver (14) for the reception of the transmitted light (28) and for the provision of an electronic received signal (I), an evaluation unit (16) for the recording of the received signal (I) and for the outputting of a detection signal when an opaque object (36) to be detected enters into the transmitted light beam. To provide an improved sensor with which in particular objects can be detected in an improved manner on which only some of the transmitted light is incident, it is proposed that the transmitted light profile (22) defines a detection zone extending transversely to the transmitted beam direction between the transmitter and receiver or reflector (26) and is received by the receiver (14), with a free beam path, via the reflector or directly by the receiver (14) and that the evaluation unit (16) has means for the determination and adjustment of a recognition threshold value (S) and that the detection signal can be output when the received signal (I) is beneath the recognition threshold value (S).