Arrangement for the precise distance measuring, in particular the filling level measuring

US6486826B1 · kind B1 · utility

Assignee

• EADS Deutschland GmbH · DE

Inventors

• Stefan Cramer · Lampertheim, DE
• Berthold Zimmermann · Blaustein, DE
• Rolf Gluth · Neu-Ulm, DE

Key dates

• Filing date: Mar 29, 1999
• Grant date: Nov 26, 2002
• Expiry date: Mar 29, 2019

Classification

• Technology area (CPC G): Physics
• CPC primary: G01F23/284
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

An arrangement for the precise measuring of the distance with a FMCW radar device having a frequency-variable digitally-actuated oscillator to generate a transmitting frequency which can be tuned over a predetermined frequency range. The digital actuation involves the use of a digital frequency generator which derives in predetermined frequency steps a references signal from a fixed-frequency oscillator signal. The frequency of the frequency-variable oscillator is adjusted in a phase-locked loop linking it to the references signal.