Broadband electrical impedance matching for piezoelectric ultrasound transducers

This paper presents a systematic method for designing broadband electrical impedance matching networks for piezoelectric ultrasound transducers. The design process involves three steps: 1) determine the equivalent circuit of the unmatched piezoelectric transducer based on its measured admittance; 2) design a set of impedance matching networks using a computerized Smith chart; and 3) establish the simulation model of the matched transducer to evaluate the gain and bandwidth of the impedance matching networks. The effectiveness of the presented approach is demonstrated through the design, implementation, and characterization of impedance matching networks for a broadband acoustic emission sensor. The impedance matching network improved the power of the acquired signal by 9 times.

[1]  V. Molchanov,et al.  Phenomenological method for broadband electrical matching of acousto-optical device piezotransducers , 1999 .

[2]  Jan M. Rabaey,et al.  Energy Scavenging for Wireless Sensor Networks: with Special Focus on Vibrations , 2012 .

[3]  M. Garcia-Rodriguez,et al.  Low cost matching network for ultrasonic transducers , 2010 .

[4]  Andreas Schröder,et al.  Computer-assisted design of transducers for ultrasonic sensor systems , 2009 .

[5]  Linas Svilainis,et al.  Optimization of the ultrasonic excitation stage , 2008, ITI 2008 - 30th International Conference on Information Technology Interfaces.

[6]  G. Gonzalez.  Microwave Transistor Amplifiers: Analysis and Design , 1984 .

[7]  J. L. San Emeterio,et al.  Evaluation of Impedance Matching Schemes for Pulse-Echo Ultrasonic Piezoelectric Transducers , 2002 .

[8]  J. Assaad,et al.  Matching ultrasonic transducer using two matching layers where one of them is glue , 2004 .

[9]  G. Kino,et al.  The design of efficient broad-band piezoelectric transducers , 1978 .

[10]  M. Castillo,et al.  KLM model for lossy piezoelectric transducers. , 2003, Ultrasonics.

[11]  Y. Chen,et al.  Multiple Acoustical Matching Layer Design of Ultrasonic Transducer for Medical Application , 2002 .

[12]  Daniel J. Inman,et al.  Improving Accessibility of the Impedance-Based Structural Health Monitoring Method , 2004 .

[13]  F. Foster,et al.  Modeling and optimization of high-frequency ultrasound transducers , 1994, IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control.

[14]  Sivaram Nishal Ramadas.  Knowledge based approach for design optimization of ultrasonic transducers and arrays , 2005, IEEE Ultrasonics Symposium, 2005..

[15]  T. Inoue,et al.  Design of Ultrasonic Transducers with Multiple Acoustic Matching Layers for Medical Application , 1987, IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control.

[16]  T. J. Lawry,et al.  Electrical optimization of power delivery through thick steel barriers using piezoelectric transducers , 2010, Defense + Commercial Sensing.

[17]  Yeong-Chin Chen,et al.  PC-base impedance measurement system for piezoelectric transducers and its implementation on elements values extraction of lump circuit model , 2008 .

[18]  Long Wu,et al.  PSPICE approach for designing the ultrasonic piezoelectric transducer for medical diagnostic applications , 1999 .

[19]  Ann Marie Sastry,et al.  Powering MEMS portable devices—a review of non-regenerative and regenerative power supply systems with special emphasis on piezoelectric energy harvesting systems , 2008 .

[20]  A. F. Grandt,et al.  Fundamentals of Structural Integrity: Damage Tolerant Design and Nondestructive Evaluation , 2003 .

[21]  Haiying Huang,et al.  Unpowered wireless transmission of ultrasound signals , 2010 .

[22]  Dong Sam Ha,et al.  Electrical modeling of Piezoelectric ceramics for analysis and evaluation of sensory systems , 2008, 2008 IEEE Sensors Applications Symposium.

[23]  George K Lewis,et al.  Cost-effective broad-band electrical impedance spectroscopy measurement circuit and signal analysis for piezo-materials and ultrasound transducers , 2008, Measurement science & technology.

[24]  M. Puig-Vidal,et al.  Piezoelectric Energy Harvesting Improvement with Complex Conjugate Impedance Matching , 2009 .