Patent · US Expired

Method and apparatus for using spring-type resistive elements in a measurement bridge circuit

US4631478A · kind A · utility

23Cited by

7References

6Claims

0Family size

Assignee

Robert Bosch GmbH · DE

Inventors

Manfred Knetsch · Stuttgart, DE
Wolfgang Kuhne · Penzberg, DE

Key dates

Filing date	Sep 22, 1982
Grant date	Dec 23, 1986
Priority date	—
Expiry date	Sep 22, 2002

Classification

Technology area (CPC G)Physics
CPC primaryG01D5/2006
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

A method for converting a movement into an analog or digital variable, in particular into an electrical voltage, and an apparatus for performing the method are proposed. The apparatus includes at least one measuring spring element having windings and fabricated of electrically conductive material, which is disposed together with a supplementary spring element of identical structure and serving as a supplementary resistor in a bridge branch of a carrier-frequency measurement bridge. A deformation of the measuring spring element by a movement causes a change in the spacing between windings and thus causes a change in the inductive resistance of the measuring spring element which serves as a standard for the movement.

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