An improved time reversal mirror based on standard linear frequency modulation waveform

Abstract Time reversal mirror (TRM) technology is the adaptive focusing method evolved from the phase conjugate method in optics. Conventional incentive method in TRM technology is a narrow pulse signal with a high bandwidth. In this paper, the autocorrelation property of the TRM was proved from the...

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Autores principales:	Yongkang Wang, Han Zhang, Huiling Li, Jianfeng Zheng, Liang Guo
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/e523641577724eca8abc0c38d9ba12dd
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spelling	oai:doaj.org-article:e523641577724eca8abc0c38d9ba12dd2021-12-02T15:08:27ZAn improved time reversal mirror based on standard linear frequency modulation waveform10.1038/s41598-020-79884-w2045-2322https://doaj.org/article/e523641577724eca8abc0c38d9ba12dd2021-01-01T00:00:00Zhttps://doi.org/10.1038/s41598-020-79884-whttps://doaj.org/toc/2045-2322Abstract Time reversal mirror (TRM) technology is the adaptive focusing method evolved from the phase conjugate method in optics. Conventional incentive method in TRM technology is a narrow pulse signal with a high bandwidth. In this paper, the autocorrelation property of the TRM was proved from the time-reversal symmetry of the wave equation. The linear frequency modulation (LFM) signal is adopted as the exciting signal in the TRM, which gives the dual autocorrelation function waveform, including the exciting signal and transport channel response. Theoretical results show that the peak value of the transducer array’s focusing signal is determined by the pulse width of the LFM signal and the number of array elements. In addition, the adaptive filtering deconvolution method is used to precisely regulate the input signal to ensure that the final detecting signal is the expected LFM waveform, which eliminates the effect of the transport channel and enhances matched filtering effects. The results hold great theoretical significances for the development of TRM technology in ultrasonic detection.Yongkang WangHan ZhangHuiling LiJianfeng ZhengLiang GuoNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-12 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Yongkang Wang Han Zhang Huiling Li Jianfeng Zheng Liang Guo An improved time reversal mirror based on standard linear frequency modulation waveform
description	Abstract Time reversal mirror (TRM) technology is the adaptive focusing method evolved from the phase conjugate method in optics. Conventional incentive method in TRM technology is a narrow pulse signal with a high bandwidth. In this paper, the autocorrelation property of the TRM was proved from the time-reversal symmetry of the wave equation. The linear frequency modulation (LFM) signal is adopted as the exciting signal in the TRM, which gives the dual autocorrelation function waveform, including the exciting signal and transport channel response. Theoretical results show that the peak value of the transducer array’s focusing signal is determined by the pulse width of the LFM signal and the number of array elements. In addition, the adaptive filtering deconvolution method is used to precisely regulate the input signal to ensure that the final detecting signal is the expected LFM waveform, which eliminates the effect of the transport channel and enhances matched filtering effects. The results hold great theoretical significances for the development of TRM technology in ultrasonic detection.
format	article
author	Yongkang Wang Han Zhang Huiling Li Jianfeng Zheng Liang Guo
author_facet	Yongkang Wang Han Zhang Huiling Li Jianfeng Zheng Liang Guo
author_sort	Yongkang Wang
title	An improved time reversal mirror based on standard linear frequency modulation waveform
title_short	An improved time reversal mirror based on standard linear frequency modulation waveform
title_full	An improved time reversal mirror based on standard linear frequency modulation waveform
title_fullStr	An improved time reversal mirror based on standard linear frequency modulation waveform
title_full_unstemmed	An improved time reversal mirror based on standard linear frequency modulation waveform
title_sort	improved time reversal mirror based on standard linear frequency modulation waveform
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/e523641577724eca8abc0c38d9ba12dd
work_keys_str_mv	AT yongkangwang animprovedtimereversalmirrorbasedonstandardlinearfrequencymodulationwaveform AT hanzhang animprovedtimereversalmirrorbasedonstandardlinearfrequencymodulationwaveform AT huilingli animprovedtimereversalmirrorbasedonstandardlinearfrequencymodulationwaveform AT jianfengzheng animprovedtimereversalmirrorbasedonstandardlinearfrequencymodulationwaveform AT liangguo animprovedtimereversalmirrorbasedonstandardlinearfrequencymodulationwaveform AT yongkangwang improvedtimereversalmirrorbasedonstandardlinearfrequencymodulationwaveform AT hanzhang improvedtimereversalmirrorbasedonstandardlinearfrequencymodulationwaveform AT huilingli improvedtimereversalmirrorbasedonstandardlinearfrequencymodulationwaveform AT jianfengzheng improvedtimereversalmirrorbasedonstandardlinearfrequencymodulationwaveform AT liangguo improvedtimereversalmirrorbasedonstandardlinearfrequencymodulationwaveform
_version_	1718388156864135168

An improved time reversal mirror based on standard linear frequency modulation waveform

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