scholarly journals Detection Method Based on Automatic Visual Shape Clustering for Pin-Missing Defect in Transmission Lines

2020 ◽  
Vol 69 (9) ◽  
pp. 6080-6091 ◽  
Author(s):  
Zhenbing Zhao ◽  
Hongyu Qi ◽  
Yincheng Qi ◽  
Ke Zhang ◽  
Yongjie Zhai ◽  
...  
2003 ◽  
Vol 1845 (1) ◽  
pp. 148-152 ◽  
Author(s):  
Michael Chajes ◽  
Robert Hunsperger ◽  
Wei Liu ◽  
Jian Li ◽  
Eric Kunz

The presence of voids is a serious problem in grouted posttensioned bridges because voids greatly reduce the corrosion-protective capabilities of the grout. Current methods for void detection suffer several significant drawbacks. A new method utilizing time domain reflectometry (TDR) is discussed. TDR is a well-developed method for detecting discontinuities in electrical transmission lines. A recent study has indicated that TDR can be used as an effective nondestructive damage detection method for concrete bridges. A void changes the electrical properties of transmission lines and therefore introduces electrical discontinuities. It can be detected and analyzed by TDR. Experiments on short specimens that are used to model grouted posttensioning ducts with built-in voids have been conducted and demonstrate the potential of TDR as a void detection method.


2018 ◽  
Vol 2018 ◽  
pp. 1-9 ◽  
Author(s):  
Li Guo ◽  
Yu Liao ◽  
Hongying Yao ◽  
Jinhao Chen ◽  
Manran Wang

Nondestructive inspection of electrical insulators subjected to the high electrical stress and environmental damage is fundamental for reliable operation of a transmission lines. The breakage and defect of the insulator have great influence on the safe of transmission lines, and insulator defect detection with difference types is a complex work. This paper proposed an insulator defect detection method inspired by human receptive field model, which meets the requirements for detecting defect insulator in a simple background. In this method, the defect detection combined human receptive field model of human visual system is constructed and applied on the different insulators, so as to achieve accurate detection of the insulator defected parts. Experimental results show that the method can accurately and robustly detect the defect (such as cracks and damage) of electrical insulator in case of noise affect.


2020 ◽  
Vol 194 ◽  
pp. 03014
Author(s):  
Yang Bo ◽  
Wang Qian ◽  
Xu Zhengyu ◽  
Bao Minghui

A transient electromagnetic detection method for site selection of substation grounding is proposed in this paper. And taking the fault detection experiment of transmission lines in a certain area of China as an example, the transient electromagnetic technology is used to obtain high-quality images reflecting the development trend and distribution of geological faults. The results show that the transient electromagnetic method is a convenient and effective way for substation site selection.


2021 ◽  
Vol 29 (19) ◽  
pp. 30483
Author(s):  
Rui Zhou ◽  
Zhiguo Zhang ◽  
Zhehao Yan ◽  
Tong Zhai ◽  
ZiYang Xiao ◽  
...  

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