Wind-induced vibration mode measuring method of power transmission line based on machine binocular vision system

Abstract

The invention discloses a wind-induced vibration mode measuring method of a power transmission line based on a machine binocular vision system. The machine binocular vision system comprises a transmission tower lead, a post vibration lead, measuring targets and a binocular identification displacement monitoring system. The measuring targets are arranged in specific positions of the power transmission line, a high-speed camera is used to implement continuous shooting, pictures are transmitted to an image processing computer via a transmission lead, instantaneous lead displacement change is calculated according to change of a distance between the adjacent targets, and a vibration mode of towers is obtained. The method has the advantages of being high in operationality, stability, sampling rate, precision and instantaneity and free of contact, can be used to monitor dynamic displacement and deformation of the transmission tower lead effectively, and thus, provides basis for real-time monitoring researches and operation safety monitoring and evaluation of wind-induced collapse of the transmission towers due to vibration of the transmission tower lead.

Description

technical field [0001] The invention belongs to the technical field of structural health monitoring, and in particular relates to a method for measuring a wind-induced vibration mode of a transmission wire based on a machine binocular vision system. Background technique [0002] In recent years, research on wire galloping online monitoring technology has gradually become one of the research hotspots in the electric power industry. The wire galloping of the transmission line is caused by the shape of the wire that is unstable to aerodynamics in the air flow due to ice coating or other reasons. ) self-excited vibration. When the conductor gallops in a large range, a long-lasting swing will easily cause a flashover between the lines, resulting in damage to the fittings and insulators, tripping of the line, broken strands and wires of the conductor, and even pulling down the tower, which will cause serious damage to the power grid. Accidents and major economic losses have seri...

AI Technical Summary

Problems solved by technology

[0003] Due to the limitation of the site environment of the transmission tower-line structure, although the conventional image processing technology can complete the analysis of various scene moving images and the extraction of information by flexibly combining multiple image processing algorithms, there are still many problems in the conventional image processing methods, such as Many parameters are difficult to adjust; many steps are cumbersome and error-prone; high image quality requirements are required, and lighting and noise have a direct impact on the performance of the algorithm, etc.

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