Lift-off suppression based on combination of bridge and transformer signal conditionings of eddy current testing

Ma, Qiuping; Tian, Gui Yun; Gao, Bin; Zhao, Xiangyu; Ru, Gaige; Li, Haoran

doi:10.1016/j.ndteint.2022.102724

Cited by 16 publications

(4 citation statements)

References 34 publications

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“…Q. Ma et al, (2022), Lift-off sebagai masalah yang menantang dalam pengujian dan evaluasi nondestruktif elektromagnetik dalam pengujian arus Eddy, yaitu sangat mempengaruhi sensitivitas deteksi dan akurasi kuantitas. Penelitian ini mengusulkan pengkondisian sinyal gabungan struktur arus Eddy diferensial berdasarkan jembatan trafo untuk menekan lift-off.…”

Section: Pendahuluanunclassified

ANALISIS CACAT PERMUKAAN LOGAM FUSELAGE SKIN BOEING 737-9 MENGGUNAKAN PROBE FREQUENCY OF EDDY CURRENT 10.000 – 500.000 Hz

Utami,

Yonathan

2023

teknika

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Kelaikudaraan atau airwothiness pada pesawat udara salah satunya dinyatakan dengan pemenuhan persyaratan pengujian komponen dan sistem. Non Destructive Testing (NDT) – Eddy Current merupakan salah satu pengujian umum yang dapat diaplikasikan pada komponen pesawat udara. Penelitian ini mempelajari analisis cacat permukaan logam fuselage skin Boeing 737-9 pada bagian Emergency Window menggunakan probe frequency of Eddy Current 10.000 – 500.000 Hz. Cacat permukaan logam uji menggunakan probe frequency of Eddy Current didekati dengan nilai depth of penetrants. Distribusi normal untuk data depth of penetrants permukaan logam fuselage skin Boeing 737-9 berbasis Al 2024-T3 memenuhi 99,7% dari pengamatan berada dalam 3 standar deviasi rata-rata ke arah kanan dan kiri. Nilai depth penetrant stabil pada nilai 0,200 mm, yaitu saat probe frequency of Eddy current 22.000 – 500.000 Hz. Semakin tinggi probe frequency maka nilai depth of penetrant semakin kecil. Hal ini disebabkan karena semakin tinggi probe frequency of Eddy Current maka resolusi keberhasilan dalam mendeteksi cacat dan retak permukaan logam semakin maksimum dan mempunyai sensitivtas yang tinggi.

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Section: Pendahuluanunclassified

ANALISIS CACAT PERMUKAAN LOGAM FUSELAGE SKIN BOEING 737-9 MENGGUNAKAN PROBE FREQUENCY OF EDDY CURRENT 10.000 – 500.000 Hz

Utami,

Yonathan

2023

teknika

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“…Testing of electromagnetic analysis and methods (TEAM) dictates that the experimental system for the ECT test must consist of at least three components. The injection component includes an oscillator or current generator and an injection coil, the detection component consists of a detection coil, and an indicator device displays the signal quantity received by the detection system in the ECT network [5]- [7]. In ECT, a crack in a conductive structure will produce a higher amplitude than a location without cracks [8].…”

Section: Introductionmentioning

confidence: 99%

Study of the System Response Analysis for the Eddy Current Test Crack Assessment on SS 316 Metal Arc Welding Joints

Pribadi,

Rusnaldy,

Haryadi

2024

Int. J. Adv. Sci. Eng. Inf. Technol.

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In modern industry, accurately assessing metal coupling by welding is critical. Given its reliability and other advantages, the eddy current test (ECT) is essential and commonly used in metal processing, especially welding. The classical ECT assesses the presence of discontinuities in the structure by monitoring the change in the probe's impedance. According to the wireless power transfer (WPT) theory, ECT members will exchange power wirelessly through mutual induction determined by inductance, capacitance, and resistance (LCR). The cracks will affect the mutual induction in the ECT's power exchange. Since LCRs are impedance components, the crack in the target will affect the system’s mutual induction, as it did to the impedance in the classical ECT. This study applies the WPT model of ECT, implements system response analysis to assess cracks, and compares the results with classical ECT. The test piece is a metal arc-welded joint on SS 316 with an implanted notch on the welded joint to simulate the crack. A series of initial tests were performed to ensure the test piece was defects-free. Simulation and a frequency scan were performed to acquire a safe measurement. The result was that both the classical ECT and the system’s response analysis successfully assessed the presence of cracks with excellent agreement. The system’s response analysis yields a more rapid result than classical ECT.

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“…For bolt thread defects detection, the commonly used methods are penetrate testing, magnetic particle testing (Chen et al , 2022) and eddy current testing (Ma et al , 2022). These methods are nondestructive, low cost and flexible usage, but the detection accuracy and applicability are restricted.…”

Section: Introductionmentioning

confidence: 99%

Method to detect the bolt thread defect in the aerospace vehicle with ultrasonic image and its implementation

Liu

Chen

et al. 2023

ACMM

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Purpose This study aims to solve the problems of ambiguous localization, large calculation, poor real-time and limited applicability of bolt thread defect detection. Design/methodology/approach First, the acquired ultrasound image is used to acquire the larger area of the image, which is set as the compliant threaded area. Second, based on the determined coordinates of the center point in each selected region, the set of coordinates on the left and right sides of the bolts is acquired by DBSCAN method with parameters eps and MinPts, which is determined by data set dimension D and the k-distance curve. Finally, the defect detection boundary line fitting is completed using the acquired coordinate set, and the relationship between the distance from each detection point to the curve and d, which is obtained from the measurement of the standard bolt sample with known thread defect, is used to locate the bolt thread defect simultaneously. Findings In this paper, the bolt thread defect detection method with ultrasonic image is proposed; meanwhile, the ultrasonic image acquisition system is designed to complete the real-time localization of bolt thread defects. Originality/value The detection results show that the method can effectively detect bolt thread defects and locate the bolt thread defect location with wide applicability, small calculation and good real-time performance.

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Lift-off suppression based on combination of bridge and transformer signal conditionings of eddy current testing

Cited by 16 publications

References 34 publications

ANALISIS CACAT PERMUKAAN LOGAM FUSELAGE SKIN BOEING 737-9 MENGGUNAKAN PROBE FREQUENCY OF EDDY CURRENT 10.000 – 500.000 Hz

ANALISIS CACAT PERMUKAAN LOGAM FUSELAGE SKIN BOEING 737-9 MENGGUNAKAN PROBE FREQUENCY OF EDDY CURRENT 10.000 – 500.000 Hz

Study of the System Response Analysis for the Eddy Current Test Crack Assessment on SS 316 Metal Arc Welding Joints

Method to detect the bolt thread defect in the aerospace vehicle with ultrasonic image and its implementation

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