Device for determining the rotational speed

US6249754A · kind A · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Reinhard Neul · Stuttgart, DE
• Dirk Lamprecht · Waiblingen, DE

Key dates

• Filing date: Jun 24, 1998
• Grant date: Jun 19, 2001
• Expiry date: Jun 24, 2018

Classification

• Technology area (CPC G): Physics
• CPC primary: G01C19/56
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A device for determining a rotation rate can be employed in conjunction with a rotation rate sensor which furnishes one or two output signals that among other things are a measure for the Coriolis acceleration and thus also for the rotation rate. The device includes an arrangement for signal processing, with which both digital subtraction of the output signals and an ensuing digital multiplication by a carrier signal shifted in a digital phase shifter are accomplished. The digital multiplication is followed by a digital/analog conversion and low-pass filtration, which in the final analysis furnishes an output signal (DR) that is equivalent to the rotation rate.