G - Physics – 01 – R
Patent
G - Physics
01
R
G01R 31/00 (2006.01) G01K 1/02 (2006.01) G01K 7/00 (2006.01) G01N 27/00 (2006.01) G01R 31/308 (2006.01)
Patent
CA 2352918
An apparatus for monitoring live electrical equipment at high or medium voltage, the apparatus comprising: - at least one sensor unit placed on the equipment, comprising a first radio antenna, a sensor for producing a digital signal related to a determined physical parameter at a point to be monitored, and amplitude- modulation means connected to the sensor and to the first antenna, and activated by the energy received by said antenna; - a transceiver unit placed outside the equipment and having a second radio antenna for illuminating the first antenna, a power supply source, and signal processing means connected to the second antenna; and - the first antenna retransmitting towards the second antenna the radio wave that has been transmitted thereby, while simultaneously amplitude-modulating it in response to the output signal of the sensor, said processing means being arranged to provide a signal related to said parameter.
Alstom
Areva T&d Sa
Robic
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