Optoelectronic detection of objects by measurement of angular position to determine relative movement of a deflection unit

US10488550B2 · kind B2 · utility

Assignee

• SICK AG · DE

Inventors

• Magnus Albert · Waldkirch, DE
• Boris BALDISCHWEILER · Waldkirch, DE
• Michael Engler · Stamford, US
• Joachim Ernst Kramer · Pernitz, AT
• Jörg SIGMUND · Waldkirch, DE

Key dates

• Filing date: Jun 19, 2017
• Grant date: Nov 26, 2019
• Expiry date: Dec 20, 2037

Classification

• Technology area (CPC G): Physics
• CPC primary: G02B27/48
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

An optoelectronic sensor (10) for detecting objects comprises a light transmitter (12) for transmitting a light beam (16), a rotatable deflection unit (18) for periodically deflecting the light beam (16), an angle measuring unit (30) for determining an angular position of the deflection unit (18), a light receiver (26) for generating a reception signal from a reflected light beam (22), wherein the angle measuring unit (30) comprises an image sensor (32) moving with the deflection unit and arranged in the direction of a stationary part (44, 46) of the sensor (10), or a stationary image sensor (32) arranged in the direction of the deflection unit (18), further comprising a computing unit (36) to determine a relative movement of the deflection unit (18) with respect to the sensor (10) from a signal of the image sensor (32).