PCCP broken wire detection based on orthogonal electromagnetic principle

作     者：XIE Yun-bo FENG Hao ZHAO Ming-xin ZENG Zhou-mo 谢韵博;封皓;赵铭鑫;曾周末

作者机构：State Key Laboratory of Precision Measurement Technology and InstrumentsTianjin UniversityTianjin 300072China 

基　　金：National Natural Science Foundation of China(No.61304244) 

出 版 物：《Journal of Measurement Science and Instrumentation》 (测试科学与仪器（英文版）)

年 卷 期：2019年第10卷第1期

页      码：81-90页

摘      要：Aiming at the major failure mode of prestressed concrete cylinder pipes (PCCP),namely the fracture of prestressed steel wires,the broken wire detection technology based on orthogonal electromagnetic principle is studied. The detection system model is established and optimized by using COMSOL finite element simulation software. Furthermore,the theoretical analysis of the wire-breaking effect is carried out. The influence of factors on broken wire signal characteristics such as edge effect,circumferential relative position of the detector and broken wires,excitation frequency and relative permeability of steel wires is analyzed,which provides a theoretical guidance for the field detection. The influence of the steel cylinder structure on the simulation results is analyzed,which provides a reference for the improvement of calculation efficiency. The corresponding detection system is designed and implemented. Concretely,a high-voltage and high-power sinusoidal signal coil drive scheme based on sinusoidal pulse width modulation technology and an intelligent power module is innovatively proposed and the corresponding protection circuit is designed. The broken wire signal could be effectively extracted through a lock-in amplifier. The experimental results show that this system can effectively identify the broken wires with low cost.

主 题 词：broken wires of prestressed concrete cylinder pipes (PCCP) orthogonal electromagnetic detection finite element analysis coil drive lock-in amplifier 

学科分类：08[工学] 080401[080401] 0804[工学-材料学] 081102[081102] 0811[工学-水利类] 

核心收录：

D　O　I：10.3969/j.issn.1674-8042.2019.01.012

馆 藏 号：203607348...