Low Frequency Eddy Current Testing to Measure Thickness of Double Layer Plates Made of Nonmagnetic Steel

Naoki Tajima; Noritaka Yusa; Hidetoshi Hashizume

doi:10.3233/978-1-61499-767-2-131

Low Frequency Eddy Current Testing to Measure Thickness of Double Layer Plates Made of Nonmagnetic Steel

Naoki Tajima, Noritaka Yusa, Hidetoshi Hashizume

ENG - Quantum Science and Energy Engineering

Research output: Chapter in Book/Report/Conference proceeding › Chapter

Abstract

This study attempts to apply low frequency eddy current testing to measure the thickness of double-layered plates which consist of two 304 austenitic stainless steel plates with a thickness of about 30 mm and an air gap with a thickness of 80 mm. The results of numerical simulations show that a change in the magnetic flux density due to the thickness change of the plates appears at the center of the coil when the diameter of the exciting coil is as large as 300 mm and the exciting frequency is in the low tens of Hertz. Experimental verifications were conducted using a magneto-impedance sensor whose sensitivity was 1 mV/nT and sensing range was from 0.2 nT to 2000 nT. We used a large diameter pancake exciting coil and a compensating coil to make up for the short of the range of the magnetic sensor during the measurements. The signals of the sensor situated at the center of the exciting coil changed with the thickness of the double-layered plates, which agrees with the result of the simulations.

Original language	English
Title of host publication	Electromagnetic Nondestructive Evaluation (XX)
Editors	Artur Lopes Ribeiro, Artur Lopes Ribeiro, Helena Geirinhas Ramos, Helena Geirinhas Ramos
Publisher	IOS Press
Pages	131-138
Number of pages	8
ISBN (Electronic)	9781614997665
DOIs	https://doi.org/10.3233/978-1-61499-767-2-131
Publication status	Published - 2017 Jan 1

Publication series

Name	Studies in Applied Electromagnetics and Mechanics
Volume	42
ISSN (Print)	1383-7281
ISSN (Electronic)	1879-8322

Keywords

Magneto-impedance sensor
double structure
pancake coil
stainless steel

ASJC Scopus subject areas

Mechanical Engineering
Electrical and Electronic Engineering

Access to Document

10.3233/978-1-61499-767-2-131

Fingerprint Dive into the research topics of 'Low Frequency Eddy Current Testing to Measure Thickness of Double Layer Plates Made of Nonmagnetic Steel'. Together they form a unique fingerprint.

Cite this

Tajima, N., Yusa, N., & Hashizume, H. (2017). Low Frequency Eddy Current Testing to Measure Thickness of Double Layer Plates Made of Nonmagnetic Steel. In A. L. Ribeiro, A. L. Ribeiro, H. G. Ramos, & H. G. Ramos (Eds.), Electromagnetic Nondestructive Evaluation (XX) (pp. 131-138). (Studies in Applied Electromagnetics and Mechanics; Vol. 42). IOS Press. https://doi.org/10.3233/978-1-61499-767-2-131

Low Frequency Eddy Current Testing to Measure Thickness of Double Layer Plates Made of Nonmagnetic Steel. / Tajima, Naoki; Yusa, Noritaka ; Hashizume, Hidetoshi.

Electromagnetic Nondestructive Evaluation (XX). ed. / Artur Lopes Ribeiro; Artur Lopes Ribeiro; Helena Geirinhas Ramos; Helena Geirinhas Ramos. IOS Press, 2017. p. 131-138 (Studies in Applied Electromagnetics and Mechanics; Vol. 42).

Research output: Chapter in Book/Report/Conference proceeding › Chapter

Tajima, N, Yusa, N & Hashizume, H 2017, Low Frequency Eddy Current Testing to Measure Thickness of Double Layer Plates Made of Nonmagnetic Steel. in AL Ribeiro, AL Ribeiro, HG Ramos & HG Ramos (eds), Electromagnetic Nondestructive Evaluation (XX). Studies in Applied Electromagnetics and Mechanics, vol. 42, IOS Press, pp. 131-138. https://doi.org/10.3233/978-1-61499-767-2-131

Tajima, Naoki ; Yusa, Noritaka ; Hashizume, Hidetoshi. / Low Frequency Eddy Current Testing to Measure Thickness of Double Layer Plates Made of Nonmagnetic Steel. Electromagnetic Nondestructive Evaluation (XX). editor / Artur Lopes Ribeiro ; Artur Lopes Ribeiro ; Helena Geirinhas Ramos ; Helena Geirinhas Ramos. IOS Press, 2017. pp. 131-138 (Studies in Applied Electromagnetics and Mechanics).

@inbook{da616b8eed6d414fac94b8ac736f74b1,

title = "Low Frequency Eddy Current Testing to Measure Thickness of Double Layer Plates Made of Nonmagnetic Steel",

abstract = "This study attempts to apply low frequency eddy current testing to measure the thickness of double-layered plates which consist of two 304 austenitic stainless steel plates with a thickness of about 30 mm and an air gap with a thickness of 80 mm. The results of numerical simulations show that a change in the magnetic flux density due to the thickness change of the plates appears at the center of the coil when the diameter of the exciting coil is as large as 300 mm and the exciting frequency is in the low tens of Hertz. Experimental verifications were conducted using a magneto-impedance sensor whose sensitivity was 1 mV/nT and sensing range was from 0.2 nT to 2000 nT. We used a large diameter pancake exciting coil and a compensating coil to make up for the short of the range of the magnetic sensor during the measurements. The signals of the sensor situated at the center of the exciting coil changed with the thickness of the double-layered plates, which agrees with the result of the simulations.",

keywords = "Magneto-impedance sensor, double structure, pancake coil, stainless steel",

author = "Naoki Tajima and Noritaka Yusa and Hidetoshi Hashizume",

year = "2017",

month = jan,

day = "1",

doi = "10.3233/978-1-61499-767-2-131",

language = "English",

series = "Studies in Applied Electromagnetics and Mechanics",

publisher = "IOS Press",

pages = "131--138",

editor = "Ribeiro, {Artur Lopes} and Ribeiro, {Artur Lopes} and Ramos, {Helena Geirinhas} and Ramos, {Helena Geirinhas}",

booktitle = "Electromagnetic Nondestructive Evaluation (XX)",

}

TY - CHAP

T1 - Low Frequency Eddy Current Testing to Measure Thickness of Double Layer Plates Made of Nonmagnetic Steel

AU - Tajima, Naoki

AU - Yusa, Noritaka

AU - Hashizume, Hidetoshi

PY - 2017/1/1

Y1 - 2017/1/1

N2 - This study attempts to apply low frequency eddy current testing to measure the thickness of double-layered plates which consist of two 304 austenitic stainless steel plates with a thickness of about 30 mm and an air gap with a thickness of 80 mm. The results of numerical simulations show that a change in the magnetic flux density due to the thickness change of the plates appears at the center of the coil when the diameter of the exciting coil is as large as 300 mm and the exciting frequency is in the low tens of Hertz. Experimental verifications were conducted using a magneto-impedance sensor whose sensitivity was 1 mV/nT and sensing range was from 0.2 nT to 2000 nT. We used a large diameter pancake exciting coil and a compensating coil to make up for the short of the range of the magnetic sensor during the measurements. The signals of the sensor situated at the center of the exciting coil changed with the thickness of the double-layered plates, which agrees with the result of the simulations.

AB - This study attempts to apply low frequency eddy current testing to measure the thickness of double-layered plates which consist of two 304 austenitic stainless steel plates with a thickness of about 30 mm and an air gap with a thickness of 80 mm. The results of numerical simulations show that a change in the magnetic flux density due to the thickness change of the plates appears at the center of the coil when the diameter of the exciting coil is as large as 300 mm and the exciting frequency is in the low tens of Hertz. Experimental verifications were conducted using a magneto-impedance sensor whose sensitivity was 1 mV/nT and sensing range was from 0.2 nT to 2000 nT. We used a large diameter pancake exciting coil and a compensating coil to make up for the short of the range of the magnetic sensor during the measurements. The signals of the sensor situated at the center of the exciting coil changed with the thickness of the double-layered plates, which agrees with the result of the simulations.

KW - Magneto-impedance sensor

KW - double structure

KW - pancake coil

KW - stainless steel

UR - http://www.scopus.com/inward/record.url?scp=85019996903&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85019996903&partnerID=8YFLogxK

U2 - 10.3233/978-1-61499-767-2-131

DO - 10.3233/978-1-61499-767-2-131

M3 - Chapter

AN - SCOPUS:85019996903

T3 - Studies in Applied Electromagnetics and Mechanics

SP - 131

EP - 138

BT - Electromagnetic Nondestructive Evaluation (XX)

A2 - Ribeiro, Artur Lopes

A2 - Ramos, Helena Geirinhas

PB - IOS Press

ER -