Shadow zone fault detection
US7520573B2 · kind B2 · utility
3Cited by
21References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 22, 2005 |
| Grant date | Apr 21, 2009 |
| Priority date | — |
| Expiry date | Aug 14, 2026 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60T2270/416
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
The output of a wheel speed sensor is sampled at dithered time intervals and the samples used to construct a pair of histograms representing high and low sample values. A minimum voltage threshold is determined as a function of the output voltage associated with the dominate histogram value for the low sample values. The output voltage associated with the dominant histogram value for the high sample values is compared to the minimum voltage threshold to determine whether a potential sensor wiring problem is developing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.