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Method for measuring internal temperature of cable joint based on microwave radiation measurement

A technology of microwave radiation, cable joints, applied in the direction of measuring heat, thermometers with physical/chemical changes, thermometers, etc.

Pending Publication Date: 2022-07-29
HUBEI UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In view of the defect that it is difficult to directly measure the internal temperature of the cable joint in the existing technology, the embodiment of the present invention provides a method for measuring the internal temperature of the cable joint based on microwave radiation measurement to solve the defects in the existing technology

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  • Method for measuring internal temperature of cable joint based on microwave radiation measurement
  • Method for measuring internal temperature of cable joint based on microwave radiation measurement
  • Method for measuring internal temperature of cable joint based on microwave radiation measurement

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Embodiment Construction

[0052] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

[0053]It should be noted that the embodiments of the present invention and the features of the embodiments may be combined with each other under the condition of no conflict.

[0054] The specific method provided by the embodiment of the present invention includes:

[0055] There are two kinds of hardware implementation modes of microwave radiometer: one is direct detection mode, and the other is down-conversion mode, such as figure 1 shown. These two methods are commo...

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Abstract

The invention provides a method for measuring the internal temperature of a cable joint based on microwave radiation measurement. A microwave radiometer is placed above a cable joint to measure a microwave radiation signal at the cable joint; the microwave radiometer is connected with the computer; when a change-over switch of the microwave radiometer is switched to a cold source and a heat source respectively, the microwave radiometer outputs corresponding cold source voltage and heat source voltage respectively and transmits the cold source voltage and the heat source voltage to a computer for calibration processing, and gain and offset of a channel of the microwave radiometer are obtained; switching a switch of the microwave radiometer to an antenna end, measuring a microwave radiation signal at the cable joint by the microwave radiometer, converting the measured signal into voltage, and transmitting the voltage to a computer; the computer calculates the brightness temperature of the cable joint according to the output voltage of the microwave radiometer and the gain and offset of the channel; and the computer obtains the conductor temperature in the cable joint through brightness temperature data inversion. According to the invention, the temperature of the conductor in the cable joint can be measured in real time in a non-contact manner.

Description

technical field [0001] The invention belongs to the technical field of power cable detection, and in particular relates to a method for measuring the internal temperature of a cable joint based on microwave radiation measurement. Background technique [0002] Cable accessories (including terminal joints and intermediate joints) are an important part of the cable line that is as important as the cable and guarantees safe operation. There are many reasons for the failure of cable accessories, and the excessive temperature of the intermediate joint of the cable is one of the main factors that cause the failure of the cable. Therefore, in order to avoid failures, it is necessary to monitor the temperature conditions of the cable joints at all times. At present, the temperature measurement of cable joints in operation is mainly divided into infrared temperature measurement and optical fiber temperature measurement. This technology mainly calculates the temperature of the interna...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01K11/00
CPCG01K11/006
Inventor 丰励郑文超
Owner HUBEI UNIV OF TECH
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