Linear displacement sensor

US10724876B2 · kind B2 · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Ingo Herrmann · Friolzheim, DE
• Fabian Utermoehlen · Lippstadt, DE
• Andreas Merz · Freiberg am Neckar, DE
• Stefan Leidich · Rutesheim, DE

Key dates

• Filing date: Oct 19, 2016
• Grant date: Jul 28, 2020
• Expiry date: Nov 30, 2036

Classification

• Technology area (CPC G): Physics
• CPC primary: G01D5/24438
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A linear-displacement sensor includes a base element arranged with a sensor coil and an excitation coil in such a manner that an AC voltage is induced in the sensor coil upon application of an AC voltage to the excitation coil. An at least partly electrically conductive sliding element is configured to be shifted relative to the base element in a direction along the measurement path. The sliding element has a variable geometry along the measurement path to inductively couple partial turns of the sensor coil with the excitation coil. A correction coil is arranged above a geometry of the sliding element so that an inductive coupling of the correction coil and hence an amplitude of an AC voltage induced in the correction coil is dependent on a lateral offset of the sliding element in relation to the base element.