Novel imaging method using ultrasonic vibration velocity on sample in air

2014 Fiscal Year Final Research Report

• Project/Area Number: 24560508
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Measurement engineering
• Research Institution: Akita University
• Principal Investigator: IMANO Kazuhiko 秋田大学, 工学(系)研究科(研究院), 教授 (60125705)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Keywords: 圧電振動子 / 定電圧駆動 / 振動速度 / レーザードップラー振動計 / 伝送線路モデル / 符号化超音波 / Barker系列

Outline of Final Research Achievements

A new ultrasonic imaging system using vibration velocity is described. Uniform Surface Vibration (USV) is obtained when the piezoelectric transducer is driven by the constant voltage source. Imaging of sample placed on the piezoelectric transducer detected with the Laser Doppler vibrometer is suggested. Vibration velocity waveform which is analogous to that of driving voltage pulse in time are confirmed both from the analysis of transmission line model and experiments. Experiment of imaging having the character “U.S” on the aluminum plate are imaged. As the results, the suggested system would become a useful tool for an ultrasonic imaging in air. Moreover, this method was applied in the low S/N condition imaging, Barker coded pulse was useful in the high absoption sample imaging.

Free Research Field

超音波工学