Patent ID: 9304047
Filing Date: 2016-04-05
CPC Classification: G01K

Claim Text:
1. A temperature measuring device for an underground power cable joint comprising a copper connection pipe connecting two cable segments of an underground cable and an insulating sleeve covering the connection pipe, the temperature measuring device comprising: a built-in temperature measurer located on the underground cable joint between the connection pipe and the insulating sleeve, the built-in temperature measurer operative to exchange data with an external receiver by a radio frequency identification (RFID) technique and comprising a radio frequency induction coil operative to receive power in the form of a radio frequency signal and having a power supply transform circuit for the received power supplying all circuitry in the built-in temperature measurer, the built-in temperature measurer not comprising another power source; a radio-frequency antenna located on the underground cable outside the insulating sleeve, aligned with the built-in temperature measurer and operative to receive temperature data from the built-in temperature measurer by the RFID technique and to supply power to the built-in temperature measurer by radio frequency induction; an outside receiver located on the underground cable outside the insulating sleeve, separate from the radio frequency antenna and connected to the radio frequency antenna by a conducting wire.