Patent · US Active

Friction coefficient estimation from camera and wheel speed data

US9643617B2 · kind B2 · utility

7Cited by

15References

16Claims

0Family size

Assignee

Continental Teves AG & Co. OHG · DE

Inventors

Daniel Fischer · Fribourg, CH
Stefan Stoelzl · Weinheim, DE
Andreas Koebe · Bensheim, DE

Key dates

Filing date	Dec 9, 2013
Grant date	May 9, 2017
Priority date	—
Expiry date	Dec 9, 2033

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB60W2520/28
WIPO fieldTransport
WIPO sectorMechanical engineering

Abstract

A method and an apparatus for estimating a friction coefficient in a moving vehicle analyze image data from a forward-looking vehicle camera to produce a camera friction coefficient μk, and analyze tire slip and tire vibration based on a wheel speed signal to produce a wheel friction coefficient μw. The camera and wheel friction coefficients are both considered to produce a proactive estimated friction coefficient that is primarily based on the camera friction coefficient μk, whereas the wheel friction coefficient μw is taken into account to check plausibility of the camera friction coefficient μk.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.