Measurement method of cable tension in transmission lines based on micro&nbsp;vibration broadband phase-based motion amplification and deep learning#br#

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Journal of Vibration and Shock ›› 2025, Vol. 44 ›› Issue (1) : 163-176.

Measurement method of cable tension in transmission lines based on micro vibration broadband phase-based motion amplification and deep learning#br#

JIANG Lan1,2, YE Qingchen*1,2, TANG Bo1,2, CHENG Ruoheng3, TAO Wenxin1,2, HUANG Xing1,2

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Abstract

Cable components are widely distributed in transmission lines, and their tension values and changes are the key factors affecting the intrinsic safety of transmission lines, so they are also the focus of condition monitoring during the construction and operation of transmission lines. The traditional cable tension measurement method has some problems, such as low precision, high environmental requirements, difficult to monitor live line, etc., it is not universal in transmission lines. In this paper, an image tension measurement method combining The Broad-Band Phase-Based Motion Magnification (BPMM) and deep learning semantic segmentation is proposed. By enhancing the image vibration amplitude, To achieve the amplification of microvibration images of cable components of transmission lines under environmental excitation. in order to remove the noise artifacts caused by BPMM algorithm after vibration video processing and improve the recognition accuracy, a joint segmentation method based on deep learning U-Net network and level set loss entropy is proposed to extract the centrosity of cable components and achieve the accurate pick-up of microvibration pixel changes. Then the natural vibration frequency is obtained and the cable tension is calculated by frequency domain analysis. The test and engineering application show that the strain measurement method based on microvibration amplification can effectively identify the small vibration changes of the cable under environmental excitation, and the error of the measured cable tension value is less than 6% compared with that of the sensor, which realizes the high-precision and non-contact measurement of the cable tension of the transmission line, and solves the difficult problem of the transmission line tension measurement.

Key words

transmission lines / micro vibration / tension measurement / deep learning / image recognition / vibration frequency

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JIANG Lan1, 2, YE Qingchen1, 2, TANG Bo1, 2, CHENG Ruoheng3, TAO Wenxin1, 2, HUANG Xing1, 2. Measurement method of cable tension in transmission lines based on micro vibration broadband phase-based motion amplification and deep learning#br#[J]. Journal of Vibration and Shock, 2025, 44(1): 163-176

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