Technology and device for precisely measuring temperature of cable joint on the basis of radio frequency technique

A method for measuring temperature of a power cable joint where a temperature measuring device is provided which includes a built-in temperature measurer and an outside receiver, wherein

• The built-in temperature measurer is located between a copper connection pipe connecting two cable joint segments and an insulating sleeve, the outside receiver is located at another position outside the insulating sleeve, information exchange and energy transmission can be carried out by means of radio frequency identification technique, the outside receiver has a radio frequency antenna for radio frequency transmission for receiving the transmitted temperature data and transferring the data to a secondary transmitter, the built-in temperature measurer includes a radio frequency identification responser for radio frequency identification response, the radio frequency identification responser includes a radio frequency antenna for communicating with the outside receiver, the built-in temperature measurer doesn't have an external power source, all the circuits in the built-in temperature measurer are supplied power by the outside receiver in the electromagnetic induction mode;
• The outside receiver can be separated from the radio frequency antenna, the radio frequency antenna is placed on the basis of the corresponding position of the built-in temperature measurer, the mounting position of the outside receiver can be adjusted on the basis of the joint structure, the outside receiver connects to the radio frequency antenna via a conducting wire;
• A temperature sensor contacts with the detected cable core or copper connection pipe directly, the measuring temperature value is transmitted to the outside receiver via the radio frequency antenna by means of the radio frequency, and the outside receiver has a wired or wireless remote communication interface;
• characterized in that the method includes the following steps:
• The temperature data in the intermediate cable joints is picked up by the built-in temperature measurer;
• The original data picked up is processed and then the signal is transmitted by means of the radio frequency;
• The transmitted signal is received by the outside receiver in the corresponding receiving mode, and then input and transferred to the identification reader.