Managed traverse system and method to acquire accurate survey data in absence of precise GPS data
US7619561B2 · kind B2 · utility
31Cited by
10References
17Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 20, 2008 |
| Grant date | Nov 17, 2009 |
| Priority date | — |
| Expiry date | Nov 20, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S19/49
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method and system obtains precise survey-grade position data of target points in zones where precise GPS data cannot be obtained, due to natural or man-made objects such as foliage and buildings. The system comprises a GPS receiver mounted on a survey pole, with an inertial measurement unit (IMU) and an electronic distance meter (EDM) also mounted on the pole. The system and method obtains GPS data when outside the zone and uses the IMU inside the zone to traverse to a target point, using the EDM to obtain data reduce accumulated errors which occur with the IMU.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.