Pedometer navigator system
US6594617B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 13, 2001 |
| Grant date | Jul 15, 2003 |
| Priority date | — |
| Expiry date | Aug 8, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01C21/188
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A pedometer navigator system has an Euler Angle Measuring Subsystem (EAMS) coupled to a body frame provides Euler angles of a fixed coordinate system with respect to a navigational coordinate system. Left and right sensors are mounted on a surveyor's feet. An SBPMS (short baseline position measuring subsystem) provides a left vector {right arrow over (&rgr;)}leftp and a right vector {right arrow over (&rgr;)}rightp characterizing the position of the sensors with respect to the SBPMS coordinate system origin. A computer means responds to the Euler angles and left and right vector and determines an interval during which the left or right foot is stationary, and providing a transition vector referenced to the earth fixed navigational coordinate system. A navigation algorithm adds each transition vector to the previous present position of the navigation reference system to obtain a next present position of the position measuring subsystem.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.