Distance measuring device and method for determining a distance

US6445193B1 · kind B1 · utility

Assignees

• Mikrowellen-Technologie und Sensoren GmbH · DE
• FESTO AG & CO. · US

Inventors

• Gunther Trummer · Baiersdorf, DE
• Armin Seitz · Blankenloch, DE
• Alfred Neugobauer · Stuttgart, DE
• Karl-Heinz Forster · Dresden, DE

Key dates

• Filing date: Jun 13, 2000
• Grant date: Sep 3, 2002
• Expiry date: Jun 13, 2020

Classification

• Technology area (CPC G): Physics
• CPC primary: G01S13/88
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A distance measuring device is capable of measuring a distance to a piston with a cylinder both discretely and continuously. The distance measuring device includes a coupling probe located axially symmetrically with respect to a piston rod within the cylinder. The coupling probe transmits a continuous wave electromagnetic signal into the cylinder and detects its reflection to measure the distance to the piston while the piston is moving.