Method and device for monitoring sensor functions

US5617337A · kind A · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Franz Eidler · Leinfelden, DE
• Werner Zimmermann · Putzbrunn, DE
• Thomas Ruping · Lenningen, DE

Key dates

• Filing date: Oct 13, 1994
• Grant date: Apr 1, 1997
• Expiry date: Oct 13, 2014

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02T10/40
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A method and a device for monitoring the functions of a sensor, in particular of a sensor for detecting a measurable value in a motor vehicle. If specified operating states exist, a measurable value is detected and compared to a reference value. Faults are detected when a measured value, held by the sensor, deviates by more than a tolerance value from a reference value. A measured value which had been detected and stored at an earlier instant when a corresponding operating state existed is used as the reference value.