Sensor arrangement for contactless linear position detection

US10760927B2 · kind B2 · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Thomas Buck · Tamm, DE
• Anna Krause · Pforzheim, DE
• Stefan Leidich · Rutesheim, DE

Key dates

• Filing date: Mar 16, 2018
• Grant date: Sep 1, 2020
• Expiry date: Sep 24, 2038

Classification

• Technology area (CPC G): Physics
• CPC primary: G01D5/16
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A sensor arrangement for contactless linear position detection includes a target having a measuring transducer running along a measuring path, and a magnetic field sensor arranged at a distance from the measuring transducer and in a relatively movable manner along the measuring path. The magnetic field sensor at least partially covers the measuring transducer. The measuring transducer is magnetically conductive. The magnetic field sensor includes a carrier having at least one measuring sensor with a two-dimensional or three-dimensional detection range, and at least one permanent magnet that generates a local magnetic field. The magnetic flux of the at least one permanent magnet is introduced into the measuring transducer, which includes an influencing device configured to influence the introduced magnetic flux based on a current position of the magnetic field sensor along the measuring path.