Physical Characteristics of and Transient Response from Thin Cylindrical Piezoelectric Transducers Used in a Petroleum Logging Tool

• Main Authors: Lin Fa, Nan Tu, Hao Qu, Yingrui Wu, Ke Sun, Yandong Zhang, Meng Liang, Xiangrong Fang, Meishan Zhao
• Format: Article
• Language: English
• Published: MDPI AG 2019-11-01
• Series: Micromachines
• Subjects: petroleum acoustical-logging; piezoelectric cylindrical-shell transducer; center-frequency; experimental-measurement
• Online Access: https://www.mdpi.com/2072-666X/10/12/804

We report on a transient response model of thin cylindrical piezoelectric transducers used in the petroleum logging tools, parallel to a recently established transient response model of thin spherical-shell transducers. Established on a series of parallel-connected equivalent-circuits, this model provides insightful information on the physical characteristics of the thin cylindrical piezoelectric transducers, i.e., the transient response, center-frequency, and directivity of the transducer. We have developed a measurement system corresponding to the new model to provide a state-of-the-art comparison between theory and experiment. We found that the measured results were in good agreement with those of theoretical calculations.