Method for estimating vehicular running state, vehicular running state estimating device, vehicle control device, and tire wheel
US7032436B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 21, 2001 |
| Grant date | Apr 25, 2006 |
| Priority date | — |
| Expiry date | Jun 21, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2203/0688
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The output level of vibration of a portion below the spring of a vehicle detected by a sensor, and its frequency is converted to obtain the frequency spectrum of the vibration level. Next, an operation is carried out on at least two vibration levels, at different frequency bands. The computed value is compared with a master curve showing the frequency spectrum of vibration level stored in vibration level storage to estimate the condition of a road surface so as to estimate the running state of the vehicle. Further, the running state of each tire including air pressure is detected from the vibration level of the portion below the spring to estimate the running state of the vehicle. Thereby, a multi-function sensing system is constructed for estimating the condition of a road surface or the running state of the tire with one sensor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.