Signal processing apparatus
US6785639B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 26, 2002 |
| Grant date | Aug 31, 2004 |
| Priority date | — |
| Expiry date | Dec 20, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01D1/18
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A threshold value at a side of a bottom value of a sensor signal is renewed by a value calculated by multiplying a minimum value of a deviation between the bottom value and a reference value for the predetermined period of time by a ratio when the minimum value of the deviation is equal to or smaller than the threshold value. A threshold value at a side of a peak value thereof is also renewed by a value calculated by multiplying a minimum vale of a deviation between the peak value and the reference value from the predetermined period of time by a ratio when the minimum value of the deviation is equal to or smaller than the threshold value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.