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A four-quadrant PVDF transducer for surface acoustic wave detection.

Lu Z, Dorantes-Gonzalez DJ, Chen K, Yang F, Jin B, Li Y, Chen Z, Hu X - Sensors (Basel) (2012)

Bottom Line: In this paper, a polyvinylidene fluoride (PVDF) piezoelectric transducer was developed to detect laser-induced surface acoustic waves in a SiO(2)-thin film-Si-substrate structure.In order to solve the problems related to, firstly, the position of the probe, and secondly, the fact that signals at different points cannot be detected simultaneously during the detection process, a four-quadrant surface acoustic wave PVDF transducer was designed and constructed for the purpose of detecting surface acoustic waves excited by a pulse laser line source.The experimental results of the four-quadrant piezoelectric detection in comparison with the commercial nanoindentation technology were consistent, the relative error is 0.56%, and the system eliminates the piezoelectric surface wave detection direction deviation errors, improves the accuracy of the testing system by 1.30%, achieving the acquisition at the same time at different testing positions of the sample.

View Article: PubMed Central - PubMed

Affiliation: State Key Laboratory of Precision Measuring Technology and Instruments, Tianjin University, Weijin Road, No. 92, Tianjin 300072, China. zimo.lu@yahoo.cn

ABSTRACT
In this paper, a polyvinylidene fluoride (PVDF) piezoelectric transducer was developed to detect laser-induced surface acoustic waves in a SiO(2)-thin film-Si-substrate structure. In order to solve the problems related to, firstly, the position of the probe, and secondly, the fact that signals at different points cannot be detected simultaneously during the detection process, a four-quadrant surface acoustic wave PVDF transducer was designed and constructed for the purpose of detecting surface acoustic waves excited by a pulse laser line source. The experimental results of the four-quadrant piezoelectric detection in comparison with the commercial nanoindentation technology were consistent, the relative error is 0.56%, and the system eliminates the piezoelectric surface wave detection direction deviation errors, improves the accuracy of the testing system by 1.30%, achieving the acquisition at the same time at different testing positions of the sample.

No MeSH data available.


Dispersion curve fitting results.
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f8-sensors-12-10500: Dispersion curve fitting results.

Mentions: In Figure 8 we can observe the fitting results of the theoretical curves with, first, an experimental dispersion curve under coincidence conditions of the probe and, second, with an experimental dispersion curve without adjusting the coincidence of the probe with the propagation direction. As one can see from Figure 8, the final results of the fitting procedure for the two experimental dispersion curves with adjustment and without adjustment can turn into different Young's modulus values, as in this case, 72.467 6 and 71.543 GPa, respectively, meaning an improvement of 1.3% in relative error.


A four-quadrant PVDF transducer for surface acoustic wave detection.

Lu Z, Dorantes-Gonzalez DJ, Chen K, Yang F, Jin B, Li Y, Chen Z, Hu X - Sensors (Basel) (2012)

Dispersion curve fitting results.
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC3472840&req=5

f8-sensors-12-10500: Dispersion curve fitting results.
Mentions: In Figure 8 we can observe the fitting results of the theoretical curves with, first, an experimental dispersion curve under coincidence conditions of the probe and, second, with an experimental dispersion curve without adjusting the coincidence of the probe with the propagation direction. As one can see from Figure 8, the final results of the fitting procedure for the two experimental dispersion curves with adjustment and without adjustment can turn into different Young's modulus values, as in this case, 72.467 6 and 71.543 GPa, respectively, meaning an improvement of 1.3% in relative error.

Bottom Line: In this paper, a polyvinylidene fluoride (PVDF) piezoelectric transducer was developed to detect laser-induced surface acoustic waves in a SiO(2)-thin film-Si-substrate structure.In order to solve the problems related to, firstly, the position of the probe, and secondly, the fact that signals at different points cannot be detected simultaneously during the detection process, a four-quadrant surface acoustic wave PVDF transducer was designed and constructed for the purpose of detecting surface acoustic waves excited by a pulse laser line source.The experimental results of the four-quadrant piezoelectric detection in comparison with the commercial nanoindentation technology were consistent, the relative error is 0.56%, and the system eliminates the piezoelectric surface wave detection direction deviation errors, improves the accuracy of the testing system by 1.30%, achieving the acquisition at the same time at different testing positions of the sample.

View Article: PubMed Central - PubMed

Affiliation: State Key Laboratory of Precision Measuring Technology and Instruments, Tianjin University, Weijin Road, No. 92, Tianjin 300072, China. zimo.lu@yahoo.cn

ABSTRACT
In this paper, a polyvinylidene fluoride (PVDF) piezoelectric transducer was developed to detect laser-induced surface acoustic waves in a SiO(2)-thin film-Si-substrate structure. In order to solve the problems related to, firstly, the position of the probe, and secondly, the fact that signals at different points cannot be detected simultaneously during the detection process, a four-quadrant surface acoustic wave PVDF transducer was designed and constructed for the purpose of detecting surface acoustic waves excited by a pulse laser line source. The experimental results of the four-quadrant piezoelectric detection in comparison with the commercial nanoindentation technology were consistent, the relative error is 0.56%, and the system eliminates the piezoelectric surface wave detection direction deviation errors, improves the accuracy of the testing system by 1.30%, achieving the acquisition at the same time at different testing positions of the sample.

No MeSH data available.