View in EDS HTML Full Text PDF Full Text

A novel eddy current testing for permeability measurement reducing lift-off and tilt angle effect.

Saved in:
Bibliographic Details
Title: A novel eddy current testing for permeability measurement reducing lift-off and tilt angle effect.
Authors: Huang, Pu1 (AUTHOR), Peng, Lisha1 (AUTHOR), Wen, ShuZhi1 (AUTHOR), Li, Shisong1 (AUTHOR), Huang, Songling1 (AUTHOR) huangsling@tsinghua.edu.cn
Source: Nondestructive Testing & Evaluation. Apr2026, Vol. 41 Issue 4, p1878-1896. 19p.
Subjects: Eddy current testing, Permeability measurement, Measurement errors, Nondestructive testing, Metals, Electric inductors
Abstract: As a significant parameter, metal permeability is closely related to the heat treatment state, fatigue state and hardness, which can be used to evaluate structural information. Eddy current testing (ECT) is suitable to measure permeability of metallic materials due to its advantages of being non-destructive and high sensitivity. However, lift-off variations and coil tilting will introduce measurement error. In order to solve the problems, a novel eddy current testing method immune to lift-off and tilt angle variation is investigated for permeability measurement. First of all, the analytical solution is established and analysed for tilting coil configuration. According to the analytical solution, the inductance variation of coil is only determined by lift-off and tilt angle under high-frequency measurement (~MHz). Furthermore, two absolute coils parallel to each other are designed to decouple to the lift-off and tilt angle. Combining the estimated lift-off and tilt angle, the permeability of metallic plate can be measured by the calibrated self-inductance variation in low-frequency excitation. Numerous experiments are carried out to evaluate the performance of the proposed method, and the results indicate the relative measurement error is only 2.5% with 45° to 75° inclination and 3.5 mm lift-off distance fluctuation. [ABSTRACT FROM AUTHOR]
Copyright of Nondestructive Testing & Evaluation is the property of Taylor & Francis Ltd and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
Full text is not displayed to guests.
FullText Links:
  – Type: pdflink
Text:
  Availability: 1
Header DbId: egs
DbLabel: Engineering Source
An: 193857952
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
PreciseRelevancyScore: 0
IllustrationInfo
Items – Name: Title
  Label: Title
  Group: Ti
  Data: A novel eddy current testing for permeability measurement reducing lift-off and tilt angle effect.
– Name: Author
  Label: Authors
  Group: Au
  Data: <searchLink fieldCode="AR" term="%22Huang%2C+Pu%22">Huang, Pu</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Peng%2C+Lisha%22">Peng, Lisha</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Wen%2C+ShuZhi%22">Wen, ShuZhi</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Li%2C+Shisong%22">Li, Shisong</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Huang%2C+Songling%22">Huang, Songling</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> huangsling@tsinghua.edu.cn</i>
– Name: TitleSource
  Label: Source
  Group: Src
  Data: <searchLink fieldCode="JN" term="%22Nondestructive+Testing+%26+Evaluation%22">Nondestructive Testing & Evaluation</searchLink>. Apr2026, Vol. 41 Issue 4, p1878-1896. 19p.
– Name: Subject
  Label: Subjects
  Group: Su
  Data: <searchLink fieldCode="DE" term="%22Eddy+current+testing%22">Eddy current testing</searchLink><br /><searchLink fieldCode="DE" term="%22Permeability+measurement%22">Permeability measurement</searchLink><br /><searchLink fieldCode="DE" term="%22Measurement+errors%22">Measurement errors</searchLink><br /><searchLink fieldCode="DE" term="%22Nondestructive+testing%22">Nondestructive testing</searchLink><br /><searchLink fieldCode="DE" term="%22Metals%22">Metals</searchLink><br /><searchLink fieldCode="DE" term="%22Electric+inductors%22">Electric inductors</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: As a significant parameter, metal permeability is closely related to the heat treatment state, fatigue state and hardness, which can be used to evaluate structural information. Eddy current testing (ECT) is suitable to measure permeability of metallic materials due to its advantages of being non-destructive and high sensitivity. However, lift-off variations and coil tilting will introduce measurement error. In order to solve the problems, a novel eddy current testing method immune to lift-off and tilt angle variation is investigated for permeability measurement. First of all, the analytical solution is established and analysed for tilting coil configuration. According to the analytical solution, the inductance variation of coil is only determined by lift-off and tilt angle under high-frequency measurement (~MHz). Furthermore, two absolute coils parallel to each other are designed to decouple to the lift-off and tilt angle. Combining the estimated lift-off and tilt angle, the permeability of metallic plate can be measured by the calibrated self-inductance variation in low-frequency excitation. Numerous experiments are carried out to evaluate the performance of the proposed method, and the results indicate the relative measurement error is only 2.5% with 45° to 75° inclination and 3.5 mm lift-off distance fluctuation. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Nondestructive Testing & Evaluation is the property of Taylor & Francis Ltd and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
PLink https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=egs&AN=193857952
RecordInfo BibRecord:
  BibEntity:
    Identifiers:
      – Type: doi
        Value: 10.1080/10589759.2025.2487582
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 19
        StartPage: 1878
    Subjects:
      – SubjectFull: Eddy current testing
        Type: general
      – SubjectFull: Permeability measurement
        Type: general
      – SubjectFull: Measurement errors
        Type: general
      – SubjectFull: Nondestructive testing
        Type: general
      – SubjectFull: Metals
        Type: general
      – SubjectFull: Electric inductors
        Type: general
    Titles:
      – TitleFull: A novel eddy current testing for permeability measurement reducing lift-off and tilt angle effect.
        Type: main
  BibRelationships:
    HasContributorRelationships:
      – PersonEntity:
          Name:
            NameFull: Huang, Pu
      – PersonEntity:
          Name:
            NameFull: Peng, Lisha
      – PersonEntity:
          Name:
            NameFull: Wen, ShuZhi
      – PersonEntity:
          Name:
            NameFull: Li, Shisong
      – PersonEntity:
          Name:
            NameFull: Huang, Songling
    IsPartOfRelationships:
      – BibEntity:
          Dates:
            – D: 01
              M: 04
              Text: Apr2026
              Type: published
              Y: 2026
          Identifiers:
            – Type: issn-print
              Value: 10589759
          Numbering:
            – Type: volume
              Value: 41
            – Type: issue
              Value: 4
          Titles:
            – TitleFull: Nondestructive Testing & Evaluation
              Type: main
ResultId 1