Method for calibrating sensitivity of acceleration sensor
US6435000B1 · kind B1 · utility
Assignees
Inventors
Key dates
| Filing date | Mar 17, 2000 |
| Grant date | Aug 20, 2002 |
| Priority date | — |
| Expiry date | Mar 17, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01P2015/084
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The present invention provides a method for calibrating the sensitivity of an acceleration sensor device, which can suppress the sensitivity thereof in the direction of each of orthogonal axes other than that thereof in the direction of an orthogonal axis to be measured. This method is performed so as to calibrate the sensitivity of an acceleration sensor device which detects an acceleration by using an acceleration detecting device comprising a pair of piezoelectric elements. According to this method, when oscillations are applied to the acceleration sensor device, the absolute values of electrical outputs of the piezoelectric elements of the pair are brought close to each other by applying a voltage of a polarity, which is opposite to the polarity of polarization being already present therein, to the piezoelectric element, whose electric output has an absolute value larger than the absolute value of the electric output of the other piezoelectric element of the pair.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.