Device, ammeter and motor vehicle

US6940265B2 · kind B2 · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• M. Henning Hauenstein · Reutlingen, DE
• Andreas Stratmann · Gomaringen, DE
• Stephan Ernst · Esslingen am Neckar, DE
• Wolfgang Feiler · Reutlingen, DE
• Qu Ning · Reutlingen, DE

Key dates

• Filing date: Dec 12, 2001
• Grant date: Sep 6, 2005
• Expiry date: Dec 12, 2021

Classification

• Technology area (CPC G): Physics
• CPC primary: G01R15/207
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A device, an ammeter and a motor vehicle, having a first section and a second section of a conductor for the purpose of measuring the electrical amperage in the conductor are described; a first sensor means and a second sensor means being provided; the current flowing in the first section and in the second section generating a useful magnetic field; the first sensor means being provided to measure the useful magnetic field; the second sensor means being provided in a location where the useful magnetic field disappears; the second sensor means being provided to measure a magnetic interference field; and the measurement of the useful magnetic field being correctable by the measurement of the magnetic interference field.