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Influence of opencircuit voltage on sandwich piezoelectric transducer(PDF)

长安大学学报（自然科学版）[ISSN:1006-6977/CN:61-1281/TN]

Issue:
2019年01期
Page:
53-60
Research Field:
道路工程
Publishing date:

Info

Title:
Influence of opencircuit voltage on sandwich piezoelectric transducer
Author(s):
CAO Yang-sen;  SHA Ai-min;  CAI Ruonan;  LIU Zhuangzhuang
(1. School of Highway, Changan University, Xian 710064, Shaanxi, China; 2. Key Laboratory for SpecialArea Highway Engineering of Ministry of Education, Changan University, Xian 710064, Shaanxi, China)
Keywords:
road engineering;  piezoelectric transducer;  loading test;  opencircuit voltage
PACS:
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DOI:
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Abstract:
In order to determine the variation rule of the opencircuit voltage of piezoelectric transducers with various influence factors, and to provide a theoretical basis for improving the effect of energy collection of piezoelectric pavement, sandwich piezoelectric transducers were fabricated by using PZT5H piezoelectric ceramic wafers and polyurethane boards. By means of laboratory vibration loading tests, the variation in the opencircuit voltage of piezoelectric transducers under different loads, load frequencies, and parallel number of piezoelectric ceramic wafers were studied. On this basis, smallsize piezoelectric pavement structure models were prepared, and the influence of surface type and surface temperature on the opencircuit voltage of the piezoelectric transducer embedded in the structure was analyzed by the moving loading test. The results show that the opencircuit voltage is positively correlated with the load and load frequency, but the growth rate of the opencircuit voltage gradually decreases with an increase in the load and load frequency. The load directly affects the stress of the piezoelectric ceramic wafer. When the applied load is 5 kN and the loading frequency is 4 Hz, the opencircuit voltage of piezoelectric transducer is stable at 9.44 V. The opencircuit voltage decreases with an increase in the number of parallel piezoelectric ceramic wafers in the piezoelectric transducer. The number of piezoelectric ceramic wafers increases, and the load of a single piezoelectric ceramic wafer decreases. When the number increases from 1 to 3, the opencircuit voltage drops by 26.6%. Different types of asphalt mixtures have different mechanical properties. The opencircuit voltage under the AC13 surface layer is higher than that under the AC10 and OGFC13 surface layer, and the matching effect between the AC13 surface layer and the piezoelectric transducer is better. Temperature affects not only the structure performance of the asphalt mixture but also the performance of the piezoelectric ceramic wafer. With an increase in temperature, the structural performance of the asphalt mixture worsens, the working performance of the piezoelectric ceramic wafer decreases, and the opencircuit voltage decreases. 2 tabs, 9 figs, 22 refs.

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Last Update: 2019-01-28