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GDF Suez Tries RFID Underground
The multinational energy firm is testing a system that employs passive RFID tags to enable the detection of subterranean polyethylene utility pipes.
Apr 27, 2011—Multinational energy company GDF Suez is currently testing an RFID system that could let its staff to detect the locations of plastic pipes located underground with the use of a handheld reader. The equipment-localization solution is being provided by RYB, a utility piping and networks firm, and was developed by RYB together with applied research institute CEA-Leti, which contributed its laboratories for preliminary testing and assisted with technology development. If testing continues successfully says Marc Florette, the director of GDF Suez's R&D division, the company may plan a measured approach of installing tagged polyethylene pipes.
GDF Suez, the largest utility company in the world, generates and distributes electricity, natural gas and renewable energy. The firm is providing the testing ground for the solution—known as ELIOT (derived from the phrase Equipment for Localization and Identification by Object Technology)—in an area near Paris with varied soil and ground cover. Based on the results of the testing, the system may be commercialized by the end of this year, enabling companies to identify underground pipes.
Currently, most utility companies must utilize maps to identify the locations of buried pipes, which not only is inconvenient for underground pipe workers, but can also be a safety issue. Insufficient information about a pipe's location can lead to an industrial accident, in which a pipe could be inadvertently cut or broken.
The system can detect a pipe's location to within a few centimeters, says Marc Palomares, RYB's technical manager. To date, he reports, the tags have been read successfully through tar, sand, rocks and dry or wet soil.
"We started with an idea about how to detect plastic pipes underground," says Pierre Damien Berger, the head of the smart devices, telecommunications and integrative industries program at CEA-Leti's systems-integration division. Metal pipes can be detected using metal detectors, he explains, but locating plastic pipes can prove more challenging. Once the group determined that RFID technology was the best solution for this task, it considered two options: inserting a tag inside each pipe, or placing it on the pipe's exterior. Neither choice was ideal, however, since a tag could be broken loose when mounted either inside or outside the pipe, due to pressure from the earth, or to movement gasses and liquids passing through the pipe. So instead, the group developed a system to integrate the tag directly into the pipe, by inserting it between two layers of the pipe's wall. For pipes already installed underground, tags could be attached to their exterior. The tags can store 2,000 characters of data, though the company expects to provide tags in the future that will be able to store as many as 80,000 characters.
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