State Key Laboratory of Analog and Mixed-Signal VLSI: AMSV Distinguished Lecture by Dr. Junrui Liang

The University Lecture on “Multiple bias-flip designs towards piezoelectric energy harvesting enhancement” will take place as follows:

Date: 29 Jan 2018 (Monday)

Time: 10:30am - 11:30am

Venue: Lecture Hall, G013, N21, University of Macau


The speaker is:

Dr. Junrui Liang, Assistant Professor, School of Information Science and Technology, ShanghaiTech University, Shanghai


The Lecture is:

Multiple bias-flip designs towards piezoelectric energy harvesting enhancement



Harvesting mechanical vibration energy using piezoelectric materials can provide clean energy for powering distributed devices, such as wireless sensor nodes; in the meanwhile, by removing redundant vibration energy from a mechanical structure, the overall damping effect is increased, and structural safety is reinforced. The energy harvesting power conditioning circuit intervenes the energy couple in the electromechanical system from the electrical side. Literature has shown that the improvement of energy harvesting circuit leads to a significant increase on the harvesting capability of a piezoelectric energy harvesting (PEH) system. This talk first introduces the evolution of existing PEH circuits. A general model is derived by summarizing the working principle of existing circuits; the maximum harvesting capability of PEH circuits is further investigated. Based on this theory, the speaker and his research group have invented novel efficient synchronized multiple bias-flip power conditioning circuits for PEH. This talk will also analyze other practical factors, which confine the further improvement of harvesting capability. These factors might come from mechanical, materials, or circuit aspects. The analysis help the audiences to have a more comprehensive understanding towards the design and improvement of PEH power conditioning circuits.



Junrui Liang is an Assistant Professor at the School of Information Science and Technology, ShanghaiTech University, China. He has received his B.E. and M.E. degrees from Shanghai Jiao Tong University, China, in 2004 and 2007, respectively, and his Ph.D. degree from The Chinese University of Hong Kong, Hong Kong, in 2010. He is a member in the Technical Committee of Power and Energy Circuits and Systems in IEEE Circuits and Systems Society, and the Energy Harvesting Technical Committee in Adaptive Structures and Material Systems Branch, ASME Aerospace Division. He has also served as a Program Committee Member in SPIE Smart Structures + Nondestructive Evaluation conference and Special Session Organizer and Review Committee Member in IEEE International Symposium on Circuits and Systems.

Dr. Liang’s research interests include energy conversion and power conditioning circuits, kinetic energy harvesting and vibration suppression, mechatronics, and IoT devices. His research has led to publications of over 40 technical papers in international journals and conference proceedings, and two China patent applications. Dr. Liang is a recipient of one Best Student Contributions Award in the 19th International Conference on Adaptive Structures and Technologies (2008), two Best Paper Awards in the IEEE International Conference on Information and Automation (2009 and 2010), and the Postgraduate Research Output Award from The Chinese University of Hong Kong (2011).


For more details, kindly find the event poster, abstract and bio.