Method for measuring interface pressure based on cold contraction type cable intermediate joint

Abstract

The invention relates to the technical field of measurement for the installation contact interface pressure between a cable body and an intermediate joint, and more specifically relates to a method for measuring the interface pressure based on a cold contraction type cable intermediate joint. The method comprises the steps of selecting a thin film piezoresistive sensor and a lead; determining themeasurement position of the interface pressure, and fixing the piezoresistive sensor so as to enable the piezoresistive sensor to cling to the measurement position; arranging the lead along an axis direction of the cable; installing the cold contraction type cable intermediate joint, and enabling the piezoresistive sensor to be pressed against the contact interface of the cable body and the cold contraction type cable intermediate joint; and connecting the lead to a data acquisition system, and monitoring the interface pressure in real time. According to the invention, the cold contraction type cable intermediate joint is sleeved after the piezoresistive sensor is arranged, the installation of the intermediate joint is completed according to a correct method, the piezoresistive sensor is pressed against the installation interface of the cable body and the cold contraction type cable intermediate joint, and the lead is connected to the data acquisition system, thereby being capable of realizing long-term and effective direct measurement for the interface pressure, and being simple, fast and accurate in measurement.

Description

technical field [0001] The invention relates to the technical field of pressure measurement on the installation contact interface between a cable body and an intermediate joint, and more specifically, relates to an interface pressure measurement method based on a cold-shrinkable cable intermediate joint. Background technique [0002] In recent years, rapid economic growth has led to a sharp increase in urban electricity consumption year by year. In order to improve land utilization and meet power supply needs, large-capacity cables are widely used in urban power grids. At the same time, the long-term safe operation of cable lines has also encountered unprecedented problems. challenge. As the core link of the cable line, the cable intermediate joint plays the role of connecting and extending the transmission line, and is the link for the formation of the transmission network. The normal operation of the cable intermediate joint highlights its importance. The pressure on the ...

AI Technical Summary

Problems solved by technology

Some applicants use hollow aluminum tubes instead of cable conductors, and stick strain gauge sensors inside the tubes to measure the interface pressure on the aluminum tubes to replace the internal interface pressure of the high-voltage cable terminal stress cone in actual operation. However, this method breaks away from the cable structure, especially in When loading current is required, this method cannot meet the application requirements