Method for the signal evaluation of signals of a rangefinder

US11002841B2 · kind B2 · utility

Assignee

• CLAAS Selbstfahrende Erntemaschinen GmbH · DE

Inventors

• Rene Middelberg · Osnabrück, DE
• Sven Carsten Belau · Vellmar, DE
• Daniel Irmer · Herzebrock, DE
• Sebastian Spiekermann · Ostbevern, DE

Key dates

• Filing date: Aug 21, 2020
• Grant date: May 11, 2021
• Expiry date: Aug 21, 2040

Classification

• Technology area (CPC G): Physics
• CPC primary: G01S2007/52011
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A method for the evaluation of signals of a rangefinder having at least one sensor point involves carrying out measurements cyclically, wherein the rangefinder emits a plurality of measurement points that indicate a distance from the sensor point. The rangefinder measures distances in a plurality of directions, and a horizontal angle is associated with each measurement point. The measurement points are differentiated into useful signals and interfering signals based on the distance. Measurement points with a distance below a first limiting value are identified as interfering signals, and measurement points above the first limiting value are identified as useful signals. Useful signals are associated with a first measurement area when they satisfy a predetermined condition for distance and horizontal angle. The quantity of useful signals in the first measurement area is determined, and a warning signal is emitted when the quantity of useful signals lies below a first threshold value.