New synchronized mechanical switch to improve piezoelectric energy harvesting efficiency and Its characteristic analysis in nonlinear system
                                               GE Cong1, LIU Hai li2, LIANG Jun rui1,3
(1.Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050, China;2.School of Information Science and Technology, ShanghaiTech University, Shanghai 201210, China;3.University of Chinese Academy of Sciences, Beijing 100049, China)


Abstract: Aiming at the high power consumption in the self powered synchronized switch energy harvesting with inductor circuit (SP SSHI) in the piezoelectric energy harvesting (PEH) technology, the research about the synchronized switch energy harvesting with inductor circuit (SSHI), self powered SSHI using electric switches (ESP SSHI) circuit and the displacement extremum detection sensor was prosented. Also studied the existing mechatronic switches for SP SSHI (MSP SSHI). Based on this, a new displacement extremum detection sensor was proposed, and which is also used in the SP SSHI to form a new circuit. A model was established for analysis the system, also experiments. The results indicate that the new MSP SSHI system shows better behavior in energy harvesting than traditional energy harvesting methods. Even more, we studied the feature of the MSP SSHI when it works at nonlinear environment. The result shows that the nonlinear MSP SSHI can operate at broader frequency range.
Key words: nonlinear system; piezoelectric energy harvesting; self-powered; SSHI; Mechatronic synchronized Switch, vibration energy