An Ultrasonic Laminated Transducer for Viscoelastic Media Detection
| Autor: | Wen-Ai Song, Yifang Chen, Lu Yang, Mingquan Wang, Kangchi Liu, Yongjian Lian, Shunmin Yang |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Materials science
Acoustics Transducers resonance frequency TP1-1185 Vibration Biochemistry Article Viscoelasticity Analytical Chemistry Nondestructive testing ultrasonic feature scanning system Computer Simulation Ultrasonics Electrical and Electronic Engineering Solid-fuel rocket Instrumentation business.industry Attenuation amplitude gain Chemical technology Industrial computed tomography Wave equation Atomic and Molecular Physics and Optics Sound Transducer ultrasonic laminated transducer Ultrasonic sensor business viscoelastic media |
| Zdroj: | Sensors, Vol 21, Iss 7188, p 7188 (2021) Sensors (Basel, Switzerland) Sensors Volume 21 Issue 21 |
| ISSN: | 1424-8220 |
| Popis: | Based on the principle of underwater transducers, an ultrasonic four-laminated transducer with a frequency of 1 MHz was proposed to solve the problem of large energy attenuation when ultrasonic waves propagate in viscoelastic media. First, this study targeted solid rocket propellant as the research object, and the energy attenuation characteristics of ultrasonic waves propagating in viscoelastic media were analyzed through the derivation of the wave equation. Second, the structure of a four-laminated transducer with a frequency of 1 MHz was designed, and the resonance frequency was obtained by a graphical method. The sound field simulation and experimental results showed that the gain of the four-laminated transducer was 15 dB higher than that of the single-wafer transducer. An ultrasonic feature scanning system was built to complete the qualitative and quantitative detection of the smallest artificial hole (ϕ2 mm × 10 mm). Finally, two different natural defects were scanned, and the results were compared with those obtained using an industrial computed tomography detection system. The results showed that the ultrasonic method was more accurate in characterizing two natural defects. The primary cause was that the industrial CT was not sensitive to defects parallel to the incident direction of the ray. Therefore, this study not only achieved the qualitative and quantitative nondestructive testing of solid rocket propellants, but also provides an important reference for other viscoelastic components. |
| Databáze: | OpenAIRE |
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