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- Title
Research on Online Monitoring of Angle Steel Strain of Transmission Tower Based on FBG Sensor.
- Authors
DU Zhiye; ZHAO Pengfei; WU Chuan; LONG Zhenhua; MENG Shengchun; HAO Zhaoyang
- Abstract
Aiming at the problem of large measurement errors in the current stress-strain monitoring methods of transmission tower, this study was carried out to improve the accuracy of strain measurement of transmission pole and tower angle steel. Based on fiber bragg grating (FBG) sensor, an accurate online monitoring method for angle steel strain of transmission towers was proposed considering the position and mode of sensor installation on the surface of angle steel. Firstly, the transmission tower angle steel surface strain distribution characteristics of different positions were analized based on the finite element simulation, and then according to the transmission tower structure in L shape characteristics of angle steel, a removable hand ring type L-type joint angle sensor was designed on the surface of the fixed clamp. The comparison and analysis of different sensor installation methods and their influence on the angle steel strain measurement accuracy were examined. Finally, this method was used to design an accurate online monitoring system of transmission pole tower angle steel strain based on fiber bragg grating sensor. The strain data of angle steel in weak position of pole tower of a 220 kV transmission line was measured and analyzed. The results show that the strain measurement error of the measured data and the finite element simulation data was less than 1. 5x10 -5 ; and the relative error was less than 6. 28%, which could effectively improve the measurement accuracy of the Angle steel strain of transmission tower. The finding of this study showed extra light on the accurate online monitoring of transmission tower structure.
- Publication
Journal of Zhengzhou University: Engineering Science, 2022, Vol 43, Issue 6, p49
- ISSN
1671-6833
- Publication type
Article
- DOI
10.13705/j.issn.1671-6833.2022.06.011