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第 2 1 卷 　第 2 期 传 感 技 术 学 报 Vol . 2 1 　N o . 2 2008 年 2 月 CHIN ES E J OU RNAL O F S EN SORS AND AC TUA TORS Feb . 2008 A Design of Power Conditioning Circuit f or Piezoelectric MicroGenerators with Double Vibrator L I A O H aiy ang 1 , 2 , W E N Z hiy u 1 , 2 , W E N Zongqu an2 , H E X uef eng 2 , L I U H ait ao2 1. Key L aboratory of Op toelectronic Technology and Sy stems of the Education M inistry of China , Chongqing University , Chongqing 400044 , China; 2. M icrosy stem Research Center , Chongqing University , Chongqing 400044 , China Abstract :A piezoelect ric microgenerator s wit h single vibrator connect ed to t he cur rent rectifier , filt er and storage cap acitor cont rol circuit can not continually supp ly ener gy to t he t ran smit tin g mo dule of wirele ss sen sor net wor k wit h high in st ant aneou s p ower con sump tion . To solve t hi s p roblem , a new st r uct ure of pi ezoelect ric microgenerator wit h double vibrator i s given . The p rincip le s of p iezoelect ric laminat ed t yp e generator s are int ro duced . A de sign of outp ut power conditioning circuit for p iezoelect ric microgenerator wit h double vibrator i s al so p re sent ed . The circuit co n si st ed of ma st erslave rectifier circuit , maj or power accumulator , filt er , sub sidiary ener gy supp lement cont roller , volt age regulator , hy st ere si s co mp arator , swit ch cont rol circuit and elect ronic swit ch et c . The exp eriment al re sult s show t hat t he timeaveraged o ut μ p ut p ower generat ed by a microgenerator wit h