材料主动俘能的方式，对压电俘能的发展有积极的促进作用。
关键词：传感器技术；压电效应；固有频率；激振力频率；俘能电路
中图分类号：TM401文献标志码：A
Analysis of active piezoelectric energy harvester
CUI Yiliang， WANG Haifeng， LI Meng， SUN Kaili， LI Chunyu
（College of Mechanical & Electrical Engineering， Qingdao University， Qingdao， Shandong 266071， China）
Abstract：Most of the existing piezoelectric traps are designed for a narrow frequency range of vibration， but the surrounding environment has a very wide frequency range， and the frequency may also be subject to change， causing the problem of difficult to achieve energy capture or capture inefficiency. In order to solve problem， a new T-type piezoelectric cantilever is proposed as a capture energy structure in the paper. To begin with the aspects of structural design and circuit design， the static analysis， modal analysis and resonance analysis of the structure are carried out and the natural frequency and excitation frequency of the device are analyzed. The design and calculation of the power consumption and the loss of the components of the circuit are analyzed by the simulation and verification of the active capture energy circuit， and the active and passive techniques are compared and analyzed， the simulation of the active capture circuit is verified by analyzing the power consumption of the circuit and the maximum power obtained by the active technology is 5 times of that of the passive technology. And then the voltage-controlled active boundary control method can be used for interface circuit design， taking the initiative to use each piezoelectric transduction cycle triggered by the electrical boundary conditions to effectively increase the input piezoelectric pump energy， and then increase output power. The way of utilizing the active trapping of piezoelectric materials is innovated， which has a positive effect on the development of piezoelectric traps.
Keywords：sensor technology； piezoelectric effect； natural frequency； exciting force frequency； energy harvesting circuit
目前，能源短缺问题日益严峻，如何从周围环境中收俘能量受到众多研究者的关注。人类可利用的环境能源有太阳能、热能、振动能等，因受限于自然条件，太阳能与热能供能技术很难广泛应用，但振动在自然环境中时刻发生着，而且能量密度极高。因此，利用振动能收集装置将环境中的振动能收集储存并为低功耗微型器件供能[1-2]有着广泛的发展前景。
