Method for measuring distances

US9268013B2 · kind B2 · utility

Assignee

• RIEGL LASER MEASUREMENT SYSTEMS GMBH · AT

Inventors

• Peter Rieger · Großau, AT
• Andreas Ullrich · Eßlingen, DE

Key dates

• Filing date: Sep 23, 2011
• Grant date: Feb 23, 2016
• Expiry date: Jul 15, 2032

Classification

• Technology area (CPC G): Physics
• CPC primary: G01S17/18
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A method for measuring distances of targets by measuring the time of flight of pulses, in particular laser pulses, reflected on those targets, including the steps of; transmitting pulses having a pulse interval which varies according to a modulation signal as transmitted pulses, and concomitantly recording of reflected pulses as received pulses; determining a first series of distance measurement values from times of flight between transmitted pulses and those received pulses which are respectively received within a first time window following each transmitted pulse; determining at least a second series of distance measurement values from times of flight between transmitted pulses and those received pulses which are respectively received within a second time window following each transmitted pulse; and determining that series of distance measurement values which is least affected by the modulation signal as result of the distance measurement.