Optoelectric sensor and a method for the detection and distance determination of objects

US8902409B2 · kind B2 · utility

Assignee

• SICK AG · DE

Inventors

• Jörg SIGMUND · Waldkirch, DE
• Stefan Mack · Berlin, DE
• Michael Kerp · Waldkirch, DE

Key dates

• Filing date: Jun 26, 2012
• Grant date: Dec 2, 2014
• Expiry date: Jan 21, 2033

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02A90/10
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

An optoelectronic sensor (10) for the detection and distance determination of objects in a monitored area (18) transmits a transmission light beam (14), generates a reception signal from remitted transmission light (20), and determines an object distance from a light time of flight. A reception path between light receiver (24) and evaluation unit (30) is divided into a first and a second partial reception path (46, 48, 50, 52) at a splitter element (44) comprising filtering properties to pass higher frequency parts of the reception signal on to the first partial reception path (46, 48) and lower frequency parts on to the second partial reception path (50, 52). An object's distance is determined from the first and an opacity from the second partial reception signal.