| Bulk acoustic wave Barker code sequence and the application in ultrasonic NDT |
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| 引用本文： | BAI Yuhai and PEI Liwei (Institute of Acoustics,Academia Sinita. Beijing 100080 ). Bulk acoustic wave Barker code sequence and the application in ultrasonic NDT[J]. 声学学报：英文版, 1994, 0(3) |
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| 作者姓名： | BAI Yuhai and PEI Liwei (Institute of Acoustics Academia Sinita. Beijing 100080 ) |
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| 作者单位： | Institute of Acoustics，Academia Sinita. Beijing 100080 |
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| 摘 要： | I.IntroductionUptonowtheultrasonicpu1seechotechniquehasbeenwide1yusedinthefieldofnon-destructivetesting.Toachievehightargetreso1ution,narrowpu1seshou1dbeadoptcd.Butthiswill1imitthetransmitpowerandthcdetectab1erange,whichisveryboportantcspecia1lyinthemediumwithstrongacousticattenuation.Itmeansthatthetargetresolutionanddetcctablerangehavccontradictorydcmands.Thcrcforethepulsccompressionandcorre1ationtechniqucdeve1opedinradarsystemhavebeenintroducedintotheultrasonicNDTandsomeprogresseshavebeenp…
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Bulk acoustic wave Barker code sequence and the application in ultrasonic NDT |
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| BAI Yuhai and PEI Liwei. Bulk acoustic wave Barker code sequence and the application in ultrasonic NDT[J]. Chinese Journal of Acoustics, 1994, 0(3) |
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| Authors: | BAI Yuhai and PEI Liwei |
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| Abstract: | A simple and convcnient method to gain bulk acoustic wave Barker code sequence is presented and the results of the correlation are givcn. The transducer response to a unit electric pulse is used as a unit code constituting the Barker code sequence of acoustic signal. The phase precision of the code sequence as well as the fairly ideal response function are guaranteed by the high accuraey of a DATA-2020 Arbitrary Waveform Synthesizer and a DATA-6000 Universal Wavcform Analyzer. Some deviations between the experiments and thcory are caused by the transient response and timc delay characteristics of the ultrasonic tansducer. |
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| Keywords: | Barker code Correlation Ultrasonic NDT |
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