遥控器用压电发电装置的供电特性  

Power-supply performance of piezoelectric generator for remote control

作　　者：唐可洪[1] 阚君武[1] 朱国仁[1] 邵承会[1] 杨志刚[1] 程光明[1] 

机构地区：[1]吉林大学机械科学与工程学院,吉林长春130025

出　　处：《光学精密工程》2008年第1期92-96,共5页Optics and Precision Engineering

基　　金：国家自然科学基金资助项目(No.50477003);吉林省科技发展计划项目(No.20050316-2No.20070331)

摘　　要：提出了利用压电发电装置替代电池为遥控器实时提供能量的技术方案。针对遥控器的操作方法和负载特性,采用脉冲激励和按压激励压电振子的实施方案,研究了压电振子在两种激励方式下对恒流负载的供电特性。结果表明,脉冲激励可获得更多的电能,适合于较大负载的工作场合。压电振子固有频率一定时,其有效工作时间随电流负载增加而缩短;电流负载一定时,存在最佳的压电振子固有频率使其有效供电时间最长。利用尺寸为50 mm×50 mm×0.5 mm的悬臂梁型压电振子为汽车遥控器供电,1次脉冲激励生成的电能为1.2 mJ,可满足实际使用要求,信号传输距离达到15 m以上。A piezoelectric electrical-energy generator was presented to provide endless and real-time electrical energy for remote control. In view of the operating method and load performance of remote control, the two exciting methods,pulse excitation and press-excltation, were utilized to impulse a piezoelectric cantilever generator to generate electrical energy. The influence of electrical energy generation and Effective Duration of Power Supply （EDPS） of the two exciting methods on constant current load was investigated experimentally. The results show that the piezoelectric generator can obtain more electric energy and longer EDPS by pulse-excitation than that by press-excitation. When pulsecxcitation is used, the EDPS decreases with the increasing of the current load. At the same time, there is an optimal natural frequency for the piezoelectric generator to obtain the longest EDPS on condition that the current load is constant. The electrical energy from the piezoelectric generator in size of 50 mm×50 mm×0.5 mmis up to 1.2 mJ, which is enough for a car remote control, and the information transfer distance is longer than 15 m.

关 键 词：悬臂梁 压电振子 发电装置 供电 遥控器 

分 类 号：TM919[电气工程—电力电子与电力传动] TN384[电子电信—物理电子学]