Device for ascertaining a rate of rotation

US5889193A · kind A · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Georg Pfaff · Schifferstadt, DE
• Rainer Erhardt · Stuttgart, DE
• Johannes Artzner · Eningen unter Achalm, DE
• Wolfram Bauer · Lörrach, DE

Key dates

• Filing date: Jun 27, 1997
• Grant date: Mar 30, 1999
• Expiry date: Jun 27, 2017

Classification

• Technology area (CPC G): Physics
• CPC primary: G01C25/005
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A rotation rate sensor is described that operates on the principle of a resonant vibration gyrometer and is excited by an amplitude-regulated oscillator loop. This sensor is used for instance to ascertain the yaw speed of a vehicle. The effect of Coriolis acceleration is evaluated, which is a measure for the current yaw speed. To monitor the operability of the sensor and the associated electronics, an integrated self-test function is used, which as a so-called BITE function introduces a defined interference variable after actuation of a test input. This defined interference variable leads to an estimatable output voltage, whose occurrence is evaluated for error detection.