Power transmission tower and power transmission line mode internal resonance analysis system and method

Abstract

The invention discloses a power transmission tower and power transmission line mode internal resonance analysis system and method. The system comprises a power transmission tower measurement target, a power transmission line measurement target, a power transmission tower binocular recognition monitoring system and a power transmission line binocular recognition system. The method is characterized by, to begin with, arranging targets at specific positions of a power transmission tower and a power transmission line; then, carrying out continuous shooting by utilizing high-speed cameras, and transmitting the pictures to an image processing computer through transmission lines; and through image processing software in the computer, calculating transient variation of displacement of the tower according to change of distance between two adjacent target points, and then, obtaining a transmission tower-transmission line vibration mode. The system has the advantages of good operability and stability and high sampling rate, high accuracy, non-contact and real-time collection and the like, and can realize effective monitoring of tower vibration in real time, thereby providing basis for research of wind-induced collapse of the power transmission tower, and optimizing future structural design.

Description

technical field [0001] The invention belongs to the field of structural health monitoring, and in particular relates to a method for analyzing the internal resonance of a power transmission tower-line mode by using a binocular vision displacement monitoring system. Background technique [0002] In recent years, accidents of power transmission towers collapsing under the action of strong winds have occurred frequently, posing a great threat to people's lives and property. However, due to the coupling effect of the transmission tower and the transmission tower line under the action of wind load, it is difficult for researchers to judge the damage of the transmission tower. One of them is the lack of effective monitoring technology due to the internal resonance damage of the tower-line coupling. Also just can't propose the measure that effectively solves transmission tower collapse. [0003] Due to the limitations of the on-site environment of the transmission tower-line struc...

AI Technical Summary

Problems solved by technology

However, due to the coupling effect of the transmission tower and the transmission tower line under the action of wind load, it is difficult for researchers to judge the damage of the transmission tower. One of them is the lack of effective monitoring technology due to the internal resonance damage of the tower-line coupling. It is also impossible to propose effective measures to solve the collapse of transmission towers.

[0003] Due to the limitations of the on-site environment of the transmission tower-line structure, the use of traditional sensors such as acceleration sensors, displacement sensors, laser sensors or global positioning systems can no longer meet the requirements for dynamic displacement monitoring of the transmission tower-line structure, so it is also impossible to accurately obtain Structural Vibration Modes

Conventional image processing technology can complete the analysis of moving images of various scenes and the extraction of information by flexibly combining multiple image processing algorithms. However, conventional image processing methods also have many problems, such as many parameters, difficult to adjust; many steps, cumbersome and error-prone ; High image quality requirements, lighting, noise have a direct impact on the performance of the algorithm, etc.

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