【摘要】 为提高双晶压电振子的发电能力,研究了一种悬臂梁式双晶压电能量采集装置的发电性能。实验研究振动台频率、激励位移、负载阻值和悬臂梁自由端质量块对悬臂梁式双晶压电能量采集装置输出电压和负载功率的影响,将两片双晶压电振子并联,研究其发电性能。实验表明:存在谐振频率,使得输出电压最大;输出电压随着激励位移和负载阻值的增大而增大,并与激励位移呈一次函数关系;双晶压电振子外接匹配负载时,负载功率最大;随着质量块的质量在一定程度上的增加,输出电压随频率变化的曲线左移,峰值电压对应的频率变小;两片双晶压电振子并联且带匹配负载时,能有效提高负载功率。更多还原

【Abstract】 To improve the power generation capacity of double crystal piezoelectric plate, the power generation performance of a double crystal piezoelectric energy collection device on cantilever beam was explored. The effects of frequency generated from the vibrator, displacement generated by incentives, resistance value of the external connection, and mass block at the free end of cantilever beam on the output voltage and output power of it were studied. By paralleling the two double crystal piezoelectric plates, the power generation performance was explored. Experimental results show that the resonance frequency existed, which maximizes the output voltage. The output voltage increased with the increase of resistance value and displacement generated by incentives, and was in linear relationship with the displacement. The output power was the largest when connecting the matching load. As the weight of mass block at the free end of cantilever beam increased to a certain extent, the curve of the output voltage and frequency relationship moved to the left, and the frequency corresponding to the peak voltage decreased. When two pieces of double crystal piezoelectric plates were paralleled and the external connected the matching load, the load power can be effectively increased.更多还原