Measuring of Electroconductive Pipe Wall Thickness Using Eddy-Current Method in Presence of Large Gap Between Pipe and Transducer

Yakimov, Evgeny; Goldstein, A; Bulgakov, V. F.; Alkhimov, Yu.V.; Belyankov, V. Yu.

doi:10.14489/td.2014.011.pp.014-018

Cited by 3 publications

(2 citation statements)

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“…In the previous paper [2], it was shown that a dual-frequency eddy-current method can reduce the dependence of thickness gauge readings on the gap size. Consider the fact that the method is capable of reducing the impact of changes in the pipe electrical conductivity on the thickness measurement results.…”

Section: Introduction Measuring the Thickness Of Pipe Wallsmentioning

confidence: 99%

“…The value of the high-frequency signal amplitude HF A is taken to calculate the gap h between the ECT and the pipe surface: The approximation error in accordance with expression (4) does not exceed 0.08 mm [2]. The dependence of the wall thickness T on the low-frequency signal phase LF  for a fixed value of the gap h (Figure 2) can be approximated by the piecewise-linear function…”

Section: Introduction Measuring the Thickness Of Pipe Wallsmentioning

confidence: 99%

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Thickness measuring of electroconductive pipe walls using the dual-frequency eddy-current method

Yakimov

Galtseva

Ustyugov

2017

J. Phys.: Conf. Ser.

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The paper describes a dual-frequency method for reducing the impact of changes in the gap size between the eddy-current transducer and the pipe, as well as the pipe electrical conductivity on the eddy-current thickness gauge readings. A block-diagram of the dualfrequency eddy-current thickness gauge is proposed for light-alloy drill pipes. The amplitude and signal phase dependencies on the wall thickness in the range from 6 to 17 mm and the gap in the range from 0 to 13.5 mm were studied, the results are presented. The digital signal processing algorithms based on the piecewise-linear approximation of low-frequency and highfrequency signal phase dependencies on the wall thickness are proposed. It is shown that the proposed correction algorithms can reduce the error caused by variations of electrical conductivity and the gap between the transducer and the pipe.

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Section: Introduction Measuring the Thickness Of Pipe Wallsmentioning

confidence: 99%

Section: Introduction Measuring the Thickness Of Pipe Wallsmentioning

confidence: 99%

Thickness measuring of electroconductive pipe walls using the dual-frequency eddy-current method

Yakimov

Galtseva

Ustyugov

2017

J. Phys.: Conf. Ser.

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Reducing the Impact of Electroconductivity and the Gap between the Pipe and the Transducer at Measuring Thickness of Electroconductive Pipe Walls using the Eddy-Current Method

Yakimov

Ustyugov

2016

MATEC Web Conf.

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Abstract. The paper describes a dual-frequency method for reducing the impact of changes in the gap size between the eddy-current transducer and the pipe, as well as the pipe electrical conductivity on the eddy-current thickness gauge readings. A block-diagram of the dual-frequency eddycurrent thickness gauge is proposed for light-alloy drill pipes. The amplitude and signal phase dependencies on the wall thickness in the range from 6 to 17 mm and the gap in the range from 0 to 13.5 mm were studied, the results are presented. The digital signal processing algorithms based on the piecewise-linear approximation of low-frequency and high-frequency signal phase dependencies on the wall thickness are proposed. It is shown that the proposed correction algorithms can reduce the error caused by variations of electrical conductivity and the gap between the transducer and the pipe.

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Tuning Out from Base Electric Conductivity in Conductive-Coating Thickness Gauging

Atavin

Uzkikh

Iskhuzhin

2018

Russ J Nondestruct Test

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Measuring of Electroconductive Pipe Wall Thickness Using Eddy-Current Method in Presence of Large Gap Between Pipe and Transducer

Cited by 3 publications

References 0 publications

Thickness measuring of electroconductive pipe walls using the dual-frequency eddy-current method

Thickness measuring of electroconductive pipe walls using the dual-frequency eddy-current method

Reducing the Impact of Electroconductivity and the Gap between the Pipe and the Transducer at Measuring Thickness of Electroconductive Pipe Walls using the Eddy-Current Method

Tuning Out from Base Electric Conductivity in Conductive-Coating Thickness Gauging

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