Paper Info
Title
A NDT Method for Location and Buried Depth Measurement of Rebars in Concrete Pole
Abstract
Accurate measurement of the buried depth of rebars can effectively judge the durability of the reinforced concrete (RC) structure. However, most of the existing measurement methods cannot determine the deflection of rebar and do not consider the influence of factors such as the diameter and spacing of rebars, which results in low buried depth measurement accuracy. Therefore, this article takes the vertical rebars in concrete poles as the research object, and proposes a nondestructive method for location and buried depth measurement based on the magnetization effect. First, this article analyzes the influence of the magnetization effect excited by the rebars on the original magnetic field and then designs the sensor layout to measure the magnetic induction intensity at different positions. Second, the central axis position and deflection angle of rebars are determined by comparing the measured data, and the buried depth is derived by applying the support vector regression (SVR) algorithm. In addition, the proposed method is verified through simulation and experiments. Finally, this article discusses the influence of the diameter and spacing of rebars on the buried depth measurement and uses the influencing factors as the inputs of the SVR algorithm model to correct the prediction results, which effectively reduces the maximum measurement error from 2.15 to 0.36 mm.
Year
DOI
Venue
2022
10.1109/TIM.2022.3184339
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT
Keywords
DocType
Volume
Magnetic field measurement, Magnetic fields, Sensor arrays, Magnetic domains, Layout, Concrete, Coils, Error analysis, magnetization effect, rebar buried depth, rebar location
Journal
71
ISSN
Citations 
PageRank 
0018-9456
0
0.34
References 
Authors
0
5
Name
Order
Citations
PageRank
Jing Zhou132754.75
Kecheng Qiu200.34
Bowen Deng300.34
Zhanlong Zhang411.36
Guoqing Ye500.34