The influence of rock anisotropy on elliptical-polarization state of inhomogenously refracted P-wave

Fa, Lin; Zhao, Jie; Han, YongLan; Li, Guohui; Ding, Pengfei; Zhao, Meishan

doi:10.1007/s11433-015-0441-1

Cited by 11 publications

(8 citation statements)

References 21 publications

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“…We have also selected water as the medium around the transducer. The density of water ρ m = 1.000 g/cm 3 ; the propagation velocity of P-wave in water v m = 1,428.6 m/s.…”

Section: Transient Process In a Prototype Spherical Shell Transducermentioning

confidence: 99%

“…Following technological progress, the quality of the piezoelectric transducers has also been improved dramatically, e.g., reduced noise level [1], lower power consumption [2], and smaller size, etc. The practical applications are far-reaching, including acoustic experimental measurement [3], acoustic logging [4], mobile and internet communications [5,6], intravascular ultrasound [7], medical imaging [8], rangefinders [9], fingerprint sensors [10], implantable micro-devices [11], nondestructive detection [12][13][14], early warning system of the dam damages, and natural hazards [15][16][17][18][19][20][21][22], and so on.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

On Transient Response of Piezoelectric Transducers

Mou

et al. 2018

Front. Phys.

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In this paper, we report a new model in analysis of spherical thin-shell piezoelectric transducers for transient response, based on Fourier transform and the principle of linear superposition. We show that a circuit-network, a combination of a series of parallel-connected equivalent-circuits, can be used in description of a spherical thin-shell piezoelectric transducer. When excited by a signal with multiple frequency components, each circuit would have a distinctive radiation resistance and a radiation mass, arising from an individual frequency component. Each frequency component would act independently on the electric/mechanic-terminals. A cumulative signal-output from the mechanic/electric-terminals is measured as the overall acoustic/electric output. As a prototype example in testing the new model, we have designed two spherical shin-shell transducers, applied a gated sine electric-signal as the initial excitation, and recorded the experimental information. The transient response and the output signals are calculated based on the new model. The results of calculation are in good agreement with that of experimental observation.

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“…We have also selected water as the medium around the transducer. The density of water ρ m = 1.000 g/cm 3 ; the propagation velocity of P-wave in water v m = 1,428.6 m/s.…”

Section: Transient Process In a Prototype Spherical Shell Transducermentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

On Transient Response of Piezoelectric Transducers

Mou

et al. 2018

Front. Phys.

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“…Acoustical measurement is ubiquitous in industrial applications, scientific research, and daily life, e.g., mobile and internet communication [1,2], exploration of underground mineral resources (oil, gas, coal, metal ores, etc.) [3], measurement of the in situ stresses of underground rock formation [4], and the inspection of mechanical properties of concrete [5,6], as well as intravascular ultrasound [7], medical imaging [8], biometric recognition [9], implantable microdevices [10], rangefinders [11], nondestructive detection [12][13][14], experimental verification of acoustic lateral displacement [15], inspection of a specific polarization state of a wave propagating in layered isotropic/anisotropic media [16,17], wave energy devices [18], and more. One of the key factors toward achieving a high-quality acoustic measurement is a good understanding of the properties of the acoustic transducers, e.g., the type of the transducers, the material property, and the geometric structure of the transducers.…”

Section: Introductionmentioning

confidence: 99%

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

Qu³

et al. 2019

Micromachines

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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.

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“…Most of these reported works have been focused on phase shift. Two models have been reported on lateral displacement [35][36][37][38][39][40][41].…”

Section: Introductionmentioning

confidence: 99%