Device for measuring the rotary frequency of a rotating vehicle wheel and vehicle tire for use in the device

US5926017A · kind A · utility

Assignee

• Continental AG · DE

Inventors

• Hubertus von Grünberg · Hannover, DE
• Thomas Becherer · Burgwedel, DE
• Heinrich Huinink · Garbsen, DE
• Klaus Kleinhoff · Rodenberg, DE

Key dates

• Filing date: Jul 3, 1997
• Grant date: Jul 20, 1999
• Expiry date: Jul 3, 2017

Classification

• Technology area (CPC G): Physics
• CPC primary: G01P3/481
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A device for measuring a rotary frequency of a rotating vehicle tire includes a number of first poles uniformly arranged on a circle with a radius R1 on or within a vehicle tire. A first sensor, for sensing the first poles, is stationarily arranged at a distance R2 from a rotational axis of the vehicle wheel. The radii have the following relationship: 0.9 R1<R2<1.1 R1. A computing unit is connected to the first sensor. The first sensor sends first signals to the computing unit when the first poles pass the first sensor. The computing unit determines a first time period between passing of sequential ones of the first poles. The computing unit multiplies a reciprocal value of the first time period by a reciprocal value of the number of the first poles to a multiplication product and supplies the multiplication product as a measure of a first rotary frequency to a user device.