Acceleration sensor
US6131457A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 6, 1999 |
| Grant date | Oct 17, 2000 |
| Priority date | — |
| Expiry date | Apr 6, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01P2015/084
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A three-dimensional acceleration sensor having a magnetic body including a mass point, mounted to a vibrator having three-dimensional freedom and an axis in line with a Z-axis within the orthogonal spatial coordinate axes of X, Y and Z. The acceleration sensor includes four or more detector elements including at least two positioned along the X-axis and at least two positioned along the Y-axis with their centers located along a concentric circle around the origin point of the coordinate axes. The sensor detects acceleration in a direction of the X-axis through a relative difference in output voltage between two of the detector elements positioned along the X-axis due to a variation of magnetic field intensity from the magnetic body, acceleration in a direction of the Y-axis through a relative difference in output voltage between two of the detector elements positioned along the Y-axis, and acceleration in a direction of the Z-axis through an aggregate sum of the output voltages of all the detector elements. The acceleration sensor thus has a wide dynamic range as well as high detection accuracy, and may be produced having a reduced size.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.