Portable altimeter and altitude computing method
US6678629B2 · kind B2 · utility
150Cited by
4References
38Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 19, 2001 |
| Grant date | Jan 13, 2004 |
| Priority date | — |
| Expiry date | Feb 6, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01C5/06
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A portable altimeter of the present invention is provided with a movement determining unit for determining whether or not the altimeter is at a standstill or moving by comparing an amount of change in altitude with a prescribed standstill threshold value and movement threshold value. When the standstill mode is set, the moving mode is then set only when the amount of change equals or exceeds the movement threshold value, and when the moving mode is set, the standstill mode is then set only when the amount of change falls below the standstill threshold value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.