Communication method for monitoring pipelines
US9000778B2 · kind B2 · utility
4Cited by
8References
24Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 15, 2011 |
| Grant date | Apr 7, 2015 |
| Priority date | — |
| Expiry date | May 15, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V15/00
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A method for underground pipeline monitoring in which a continuous alternating electrical current having a current frequency in a range of about 1 kHZ to about 8 kHz is imparted onto a pipeline, producing an alternating magnetic field at the current frequency along the pipeline. Distributed along the pipeline is a network of RFID tag sensors which absorb an amount of energy from the alternating magnetic field. The impedance of the sensors is modulated, producing a modulated sensor impedance which is detected at a location proximate the location at which the continuous alternating electrical current is imparted onto the pipeline.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.