声波测井压电换能器多频点阻抗匹配技术研究
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摘要
针对声波测井压电换能器的多频点阻抗匹配技术展开研究,首先采用多模态等效电路精确描述了换能器的导纳特性;然后通过分析多模态阻抗匹配理论,设计电感-电容复合阻抗匹配网络,并结合换能器等效电路进行参数优化和电路仿真。实验表明,相比于换能器没有阻抗匹配的测试结果,该阻抗匹配技术可大幅提高换能器在谐振频率附近多个频率处的有功功率,频带内的有功功率平均提高了30倍,从而改善换能器的激励带宽和激励效率,提高测井仪器的适应性、探测深度和分辨率。
In this paper, the multi-frequency points impedance matching technique of the acoustic logging piezoelectric transducer is studied. First, the multi-frequency points admittance characteristics of the transducer are accurately described by using the multimode equivalent circuit. Then, the theory of multi-frequency points impedance matching is analyzed, and the inductance-capacitance composite impedance matching network is designed. On this basis, by combined with the equivalent circuit of transducer the parameter optimization and the circuit simulation are carried out. Experiments show that compared with the test results of the transducer without impedance matching, the proposed impedance matching technique can greatly improve the active power of the transducer at several frequencies near the resonant frequency and increases the active power in the frequency band averagely by 30 times. In this way, the excitation bandwidth and efficiency of the transmitting transducer are greatly improved, and the adaptability, detection depth and resolution of the logging instrument are improved.
In this paper, the multi-frequency points impedance matching technique of the acoustic logging piezoelectric transducer is studied. First, the multi-frequency points admittance characteristics of the transducer are accurately described by using the multimode equivalent circuit. Then, the theory of multi-frequency points impedance matching is analyzed, and the inductance-capacitance composite impedance matching network is designed. On this basis, by combined with the equivalent circuit of transducer the parameter optimization and the circuit simulation are carried out. Experiments show that compared with the test results of the transducer without impedance matching, the proposed impedance matching technique can greatly improve the active power of the transducer at several frequencies near the resonant frequency and increases the active power in the frequency band averagely by 30 times. In this way, the excitation bandwidth and efficiency of the transmitting transducer are greatly improved, and the adaptability, detection depth and resolution of the logging instrument are improved.
引文
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[9]HUANG H,PARAMO D.Broadband electrical impedance matching for piezoelectric ultrasound transducer[J].IEEEE Trans.Ultrason.Ferroelectr.Freq.Control,2011,58(12):2699-2706.
[10]李晓,宋雁鹏,王志斌,等.压电换能器等效模型分析与阻抗匹配设计[J].应用声学,2016,35(1):13-19.LI Xiao,SONG Yanpeng,WANG Zhibin,et al.The analysis of piezoelectric transducer equivalent impedance model and the design of an impedance matching circuit[J].Appl.Acoust,2016,35(1):13-19.
[11]高天赋,曾娟,李海峰,等.压电陶瓷发射换能器的Butterworth匹配定理[J].声学学报,2006,31(4):297-304.GAO Tianfu,ZENG Juan,LI Haifeng,et al.A theorem on Butterworth matching for piezoelectric ceramic emission transducer[J].Acta Acustica,2006,31(4):297-304.
[12]CHEN Y,WU S.Multiple acoustical matching layer design of ultrasonic transducer for medical application[J].Japanese Journal of Applied Physics,2002,41(10):6098-6107.
[13]徐晓伟.压电超声换能器的阻抗匹配分析[J].压电与声光,2014,36(5):745-747.XU Xiaowei.Analysis on the matching impedance of piezoelectric ultrasonic transducer[J].Piezoelectrics&Acoustooptics,2014,36(5):745-747.
[2]谭宝海,唐晓明,魏周拓,等.随钻偶极横波远探测优势频带及反射声场[J].石油学报,2016,37(9):1152-1158.TAN Baohai,TANG Xiaoming,WEI Zhoutuo,et al.Dominant frequency band and reflect wave field of LWD dipole shear wave remote detection[J].Acta petrolei Sinica,2016,37(9):1152-1158.
[3]许玉俊,沈建国,田素月,等.提高声波测井仪器的关键-换能器的频率特征[J].石油仪器,2003,17(4):5-7.XUYujun,SHENGJianguo,TIANSuyue,etal.Key factorsforimproving the properties of sonic logging tool:Frequency characters of the transducer[J].PetroleumInstruments,2003,17(4):5-7.
[4]CYSEWSKA-SOBUSIANK A,SOWIER A,SKRZYWANEK P.Application of rotating EUS micro-probes for deep penetration of upper gastrointestinal tract[C]//Sensors,2004.Proceedings of IEEE,2004,1492-1495.
[5]RAMESH R,PILIAL S S,ABRAHAM P,et al.Characteristics of broadband underwater transducers integrated with turning coil and cables[C]//IEEE Proceedings of SYMPOL,2009:133-138.
[6]周瑜,涂其捷,杨荣耀,等.压电水声换能器宽带匹配特性研究[J].声学技术,2018,37(3):286-291.ZHOU Yu,TU Qijie,YANG Yongyao,et al.Resear on broadband matching performance of piezoelectric underwater acoustic transducer[J].Technical Acoustics,2018,37(3):286-291.
[7]BRUFAU-PENELLA J,PUIG-VIDAL M.Piezoelectric energy harvesting improvement with complex conjugate impedance matching[J].J.Intell.Mater.Syst.Struct.2008,20(5):597-608.
[8]潘仲明,祝琴.压电换能器阻抗匹配技术研究[J].应用声学,2007,26(6):357-361.PAN Zhongming,ZHU Qin.Study of impedance matching technology for piezoelectric transducer[J].Appl.Acoust,2007,26(6):357-361.
[9]HUANG H,PARAMO D.Broadband electrical impedance matching for piezoelectric ultrasound transducer[J].IEEEE Trans.Ultrason.Ferroelectr.Freq.Control,2011,58(12):2699-2706.
[10]李晓,宋雁鹏,王志斌,等.压电换能器等效模型分析与阻抗匹配设计[J].应用声学,2016,35(1):13-19.LI Xiao,SONG Yanpeng,WANG Zhibin,et al.The analysis of piezoelectric transducer equivalent impedance model and the design of an impedance matching circuit[J].Appl.Acoust,2016,35(1):13-19.
[11]高天赋,曾娟,李海峰,等.压电陶瓷发射换能器的Butterworth匹配定理[J].声学学报,2006,31(4):297-304.GAO Tianfu,ZENG Juan,LI Haifeng,et al.A theorem on Butterworth matching for piezoelectric ceramic emission transducer[J].Acta Acustica,2006,31(4):297-304.
[12]CHEN Y,WU S.Multiple acoustical matching layer design of ultrasonic transducer for medical application[J].Japanese Journal of Applied Physics,2002,41(10):6098-6107.
[13]徐晓伟.压电超声换能器的阻抗匹配分析[J].压电与声光,2014,36(5):745-747.XU Xiaowei.Analysis on the matching impedance of piezoelectric ultrasonic transducer[J].Piezoelectrics&Acoustooptics,2014,36(5):745-747.
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