Evaluation apparatus of hub unit and evaluating method of hub unit
US7821950B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 24, 2008 |
| Grant date | Oct 26, 2010 |
| Priority date | — |
| Expiry date | Nov 28, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01M13/045
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
In an evaluation apparatus of a hub unit, a signal processing unit outputs frequency analysis signals which indicate such a result obtained by that an output signal of an acceleration sensor fixed on a hub unit by a magnet is processed via an A/D converting unit and an envelope detecting unit, and thereafter, the processed sensor signal is analyzed for a frequency analysis by an FFT unit. Then, an evaluation output unit evaluates damage conditions of the hub unit based upon signal strengths of specific frequencies, and overall values, which are acquired from the frequency analysis signals, and then, outputs the evaluated damage condition to a display unit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.