Limits...
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.


PVDF piezoelectric sensor: (a) schematic structure of PVDF foil piezoelectric transducer; (b) PVDF foil piezoelectric transducer physical picture.
© Copyright Policy
Related In: Results  -  Collection

License
getmorefigures.php?uid=PMC3472840&req=5

f2-sensors-12-10500: PVDF piezoelectric sensor: (a) schematic structure of PVDF foil piezoelectric transducer; (b) PVDF foil piezoelectric transducer physical picture.

Mentions: The piezoelectric sensor is composed of a piezoelectric material PVDF foil with both positive and negative sides, coated with a silver electrode. To convert this material into a surface acoustic wave piezoelectric transducer device, hydrofluoric acid (HF) was used to corrode and form electrode patterns, as well as used copper rivets to connect the two electrode leads. A schematic figure and a picture of the PVDF foil piezoelectric transducer structure are shown in Figure 2. On the basis of this basic PVDF foil transducer and harnessing the properties of the foil to meet the demands of the probe directivity, a combined structure of the PVDF foil transducer as a four-quadrant piezoelectric transducer was designed, and shown in Figure 3.


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)

PVDF piezoelectric sensor: (a) schematic structure of PVDF foil piezoelectric transducer; (b) PVDF foil piezoelectric transducer physical picture.
© Copyright Policy
Related In: Results  -  Collection

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

f2-sensors-12-10500: PVDF piezoelectric sensor: (a) schematic structure of PVDF foil piezoelectric transducer; (b) PVDF foil piezoelectric transducer physical picture.
Mentions: The piezoelectric sensor is composed of a piezoelectric material PVDF foil with both positive and negative sides, coated with a silver electrode. To convert this material into a surface acoustic wave piezoelectric transducer device, hydrofluoric acid (HF) was used to corrode and form electrode patterns, as well as used copper rivets to connect the two electrode leads. A schematic figure and a picture of the PVDF foil piezoelectric transducer structure are shown in Figure 2. On the basis of this basic PVDF foil transducer and harnessing the properties of the foil to meet the demands of the probe directivity, a combined structure of the PVDF foil transducer as a four-quadrant piezoelectric transducer was designed, and shown in Figure 3.

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.