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Detection of Echo Signals from Discontinuities Due to the Use of Superresolution Procedures for Testing Concrete Piles by the Impact Method

  • ACOUSTIC METHODS
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Russian Journal of Nondestructive Testing Aims and scope Submit manuscript

Abstract

The impact method is used to test concrete piles. It allows one to record echo signals from the toe of the pile and from reflectors in it. However, the resolution of the measured echo signal is not high enough to confidently separate the reflected pulses and determine their phase. The use of the maximum entropy (ME) method makes it possible to increase the resolution of echo signals obtained by the impact method in a concrete pile with a length of 3000 mm by approximately three times and confidently identify echo signals from artificial reflectors both in the form of a disk with a thickness of 100 mm and in the form of a parallelepiped with a height of 300 mm. The use of the method of compressive sensing (CS) allows increasing the resolution of the same echo signals by approximately ten times. The main problem of the successful application of the ME and CS methods is the determination of the pulse response of a concrete pile upon the impact. A method for estimating the pulse response from the processed echo signal is proposed.

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ACKNOWLEDGEMENTS

The author expresses his gratitude to the research engineer of the Scientific Center “Arktika” of the St. Petersburg Mining University of Empress Catherine II E.S. Loseva for setting the problem and providing echo signals for processing.

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This work was supported by ongoing institutional funding. No additional grants to carry out or direct this particular research were obtained.

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  1. ECHO+ Scientific & Production Center, 123458, Moscow, Russia

    E. G. Bazulin

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Bazulin, E.G. Detection of Echo Signals from Discontinuities Due to the Use of Superresolution Procedures for Testing Concrete Piles by the Impact Method. Russ J Nondestruct Test 59, 868–875 (2023). https://doi.org/10.1134/S1061830923700511

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