Laser measuring means for measuring a distance from an object, and method of operating same

US11536835B2 · kind B2 · utility

Assignee

• Fraunhofer-Gesellschaft zur förderung der angewandten Forschung e.V. · DE

Inventors

• Maik Beer · Duisburg, DE
• Olaf Schrey · Ratingen, DE
• Werner Brockherde · Duisburg, DE
• Bedrich Hosticka · Rübhausen, DE

Key dates

• Filing date: May 28, 2019
• Grant date: Dec 27, 2022
• Expiry date: Jun 7, 2041

Classification

• Technology area (CPC G): Physics
• CPC primary: G01S7/4865
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A laser measuring set for measuring a distance from an object includes a pulse laser for emitting a laser pulse at the beginning of a measuring cycle; an optical sensor having at least one detection unit for generating detection signals; a coincidence recognition stage for generating coincidence signals, wherein during the measuring cycle, one of the coincidence signals is generated each time the detection signals generated by the detection unit reach at least a preset coincidence depth within a coincidence time; a coincidence time presetting stage for presetting the coincidence time for the coincidence recognition stage, the coincidence time presetting stage being configured such that the coincidence time monotonically increases during the measuring cycle; and travel-time measuring set for determining the distance on the basis of a travel-time measurement of the coincidence signals.