Method for analyzing power transmission tower structure modal through adoption of binocular vision displacement monitoring system

Abstract

The present invention discloses a method for analyzing power transmission tower structure modal through adoption of a binocular vision displacement monitoring system. The binocular vision displacement monitoring system comprises a measurement target, an image collection device, an image processing computer and a wind speed and wind direction measurement device. The method comprises: setting a target at the weak position of a power transmission tower, employing a camera to perform continuous shooting, and transmitting images to an image processing computer through a lead; and calculating the instantaneous changing of the power transmission tower displacement through the image processing software in the computer according to a distance between two adjacent target points so as to obtain the vibration modal of the power transmission tower. The method for analyzing power transmission tower structure modal through adoption of the binocular vision displacement monitoring system has good operability and stability, and is high in sampling rate, high in precision and non-contact, can perform multi-point real-time collection, and realize effective monitoring of the power transmission tower so as to provide the basis for the research of wind-induced collapse of the power transmission tower and optimize the following structure design.

Description

technical field [0001] The invention belongs to the technical field of structural health monitoring, and in particular relates to a method for analyzing the structural mode of a power transmission tower by using a binocular visual 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 irregular vibration of the transmission tower under the action of wind load, it is difficult for researchers to judge the vibration of the transmission tower and obtain accurate vibration modes, so it is impossible to propose effective measures to solve the collapse of the transmission tower. [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 g...

AI Technical Summary

Problems solved by technology

However, due to the irregular vibration of the transmission tower under the action of wind load, it is difficult for researchers to judge the vibration of the transmission tower, it is difficult to obtain accurate vibration modes, and it is impossible to propose effective measures to solve the collapse of the transmission tower

[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 calculate Structurally accurate stress situations

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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