Electromagnetic pipe mapper for accurate location and depth determination
US5640092A · kind A · utility
44Cited by
19References
6Claims
0Family size
Inventors
Key dates
| Filing date | Jul 26, 1994 |
| Grant date | Jun 17, 1997 |
| Priority date | — |
| Expiry date | Jul 26, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V3/104
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The device comprises a target signal transmitter to induce an electromagnetic signal in the hidden object, a position reference transmitter to transmit a signal for positioning purposes, a sensor unit to detect changes in the magnetic flux of the hidden object due to the induced electromagnetic signal and the positioning signal from the position reference transmitter, and a central unit to process and display a map of the hidden object. The initial processing of the data results in a gray-scale representation of the object, but additional data processing may be performed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.