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| Uncertainty Evaluation of Piezoelectric Constant Measurement Based on Dynamic Resonance Method |
| ZHANG Rui-wen1,HE Long-biao2,ZHU Hai-jiang1,YANG Ping2 |
1. Beijing University of Chemical Technology, Beijing 100029, China;
2. National Institute of Metrology, Beijing 100029, China |
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Abstract A labview programming was written to achieve automatic measurements and data analysis. Based on the mathematical models established, the sweeping frequency step was optimized, and the characteristic parameters of piezoelectric ceramic NCE51 cylinders were tested and the uncertainty was evaluated. For 15mm thick sample, the relative expanded uncertainty of d33 measurement of piezoelectric ceramic is 0.96% (k=2), when the frequency step is selected as 50Hz. Thus the sample measured by dynamic resonance method can be used as reference material to calibrate the commercial d33 measurement apparatus, which uncertainty is about 2% to 5%.
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2015, Vol. 36 
