(1. 湘潭大學(xué) 機(jī)械工程學(xué)院，湘潭 411105；
2. 上海理工大學(xué) 材料科學(xué)與工程學(xué)院，上海 200093)
摘 要: 利用高剪切壓電系數(shù)，設(shè)計(jì)并制作并聯(lián)結(jié)構(gòu)d15模式PZT-51懸臂梁裝置，測(cè)量其在不同負(fù)載電阻下輸出峰-峰值電壓和輸出功率隨頻率變化的關(guān)系以及不同負(fù)載電阻下共振瞬時(shí)輸出電壓和振動(dòng)激勵(lì)電壓與輸出峰-峰值電壓關(guān)系。當(dāng)頻率為96 Hz、負(fù)載電阻為100 kΩ時(shí)，該P(yáng)ZT-51懸臂梁裝置的輸出峰-峰值電壓最大值為1.96 V，輸出功率達(dá)到最大為19.21 μW。隨著振動(dòng)激勵(lì)電壓的增大，并聯(lián)結(jié)構(gòu)d15模式PZT-51懸臂梁裝置的輸出峰-峰值電壓隨之增大，并聯(lián)結(jié)構(gòu)d15模式PZT-51懸臂梁俘能特性的研究可為設(shè)計(jì)d15模式壓電俘能器提供指導(dǎo)。
關(guān)鍵字: PZT-51陶瓷；懸臂梁；d15模式；并聯(lián)；剪切壓電系數(shù)
（1. School of Mechanical Engineering, Xiangtan University, Xiangtan 411105, China;
2. School of Materials Science and Engineering, University of Shanghai for Science and Technology,
Shanghai 200093, China）
Abstract:Utilizing the high shear piezoelectric coefficient of PZT-51 ceramic, the parallel connection device of d15 mode PZT-51 cantilever beam was designed and fabricated. The dependences of output peak-to-peak voltage and output power on frequency were studied at various load resistances. The dependence of peak-to-peak voltage on excitation voltage and the resonance transient output voltage were measured at various load resistances. Maximum output peak-to-peak voltage of 1.96 V and maximum output power of 19.21 μW for PEH with load resistance of 100 kΩ are obtained at frequency of 96 Hz. With increasing vibration excitation voltage, the output peak-to-peak voltage of PEH increases. The proposed structure will provide useful guidelines for the design of d15 mode piezoelectric energy harvesters.
Key words: PZT-51 ceramic; cantilever; d15 mode; parallel connection; shear piezoelectric coefficient
