Patent · US Active

Linear travel measurement apparatus for a compression travel of a telescopic spring unit, and corresponding telescopic spring unit

US10386205B2 · kind B2 · utility

1Cited by

7References

11Claims

0Family size

Assignee

Robert Bosch GmbH · DE

Inventors

Fabian Utermoehlen · Lippstadt, DE
Stefan Leidich · Rutesheim, DE

Key dates

Filing date	Sep 26, 2016
Grant date	Aug 20, 2019
Priority date	—
Expiry date	Nov 9, 2036

Classification

Technology area (CPC G)Physics
CPC primaryG01D5/243
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

A linear travel measurement apparatus for a compression travel of a telescopic spring unit includes an electrically conductive spring. A telescopic spring unit includes a linear travel measurement apparatus of this kind. The spring is configured to form a measurement inductance, which is dependent on an effective length of the spring. The spring has a respective electrical contact at each of its ends and is connected to a measurement capacitance and to an evaluation and control unit by corresponding electrical connections. The measurement inductance forms an electrical LC resonant circuit with the measurement capacitance, the evaluation and control unit are configured to measure the resonant frequency of said LC resonant circuit, and the resonant frequency is given as a function of the compression travel.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.