Displacement detection device for a portable apparatus
US7672806B2 · kind B2 · utility
72Cited by
7References
24Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 30, 2005 |
| Grant date | Mar 2, 2010 |
| Priority date | — |
| Expiry date | Mar 1, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01P15/18
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
In a displacement detection device, an acceleration sensor generates at least a first acceleration signal relating to an axis of detection, and a displacement detection circuit is connected to the acceleration sensor has a comparator stage for comparing the acceleration signal with a programmable acceleration threshold and generates a displacement-detection signal. A high-pass filter is arranged between the acceleration sensor and the comparator stage so as to reduce a DC component of the acceleration signal. The cut-off frequency of the high-pass filter is modified according to the type of displacements that are to be detected.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.