Accurate temperature measurement technology and device thereof for cable connector based on radio frequency technology

Abstract

The invention provides a method and a device for on-line measurement on inner temperature of a cable connector based on a radio frequency technology. The device comprises a built-in temperature measurer and an external receiver, wherein the built-in temperature measurer measures the temperature of the cable connector or a core wire surface through a direct-contact measuring method, and transmits data to the external receiver through an insulating layer by a radio frequency identification technology; and simultaneously, the external receiver supplies electric energy for the built-in temperature measurer via radio frequency signals, so that the problem of power supply of the built-in temperature measurer is solved. The device provided by the invention is accurate in temperature measurement, small in volume, strong in applicability and the like.

Description

technical field [0001] The technical invention belongs to the field of electric power detection and is used for measuring the temperature of joints between cables and preventing cable accidents. Background technique [0002] At present, high-voltage transmission lines can be divided into overhead lines and underground cables. However, with the continuous development of urbanization, more and more cities are trying to change the power supply network from overhead lines to underground cables. Since the cable is a concealed project and undertakes a huge task of power transmission, how to ensure the safety and reliability of underground cables has attracted the attention of power supply departments in various cities. [0003] During the construction and installation of underground cables, it is often necessary to connect two sections of cables together. Due to the limitation of the process, contact resistance will inevitably occur. For cables that carry large currents, the exist...

AI Technical Summary

Problems solved by technology

However, in practical applications, the use of a large number of cables without optical fibers has become a fact, and the method of using optical fiber implanted cables cannot fundamentally solve the problem of online temperature measurement of cables; secondly, according to the actual structure and use of optical fiber implanted cables , using optical fiber to measure temperature, the detection value is the temperature of the part where the optical fiber is implanted into the cable structure layer, not the actual temperature of the cable guide core; moreover, during the laying process of the optical fiber implanted cable, it is subjected to strong traction and tension. Stretching and bending deformation at the same time, the optical fiber is extremely easy to break, resulting in the loss of all functions

Therefore, the technical application of online temperature measurement by implanting optical fiber in the cable is greatly restricted, and it is impossible to fundamentally meet the requirements for accurate temperature measurement of the cable intermediate joint

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