Reliability study of Piezoelectric Structures Dedicated to Energy Harvesting by the Way of Blocking Force Investigation

[摘要] In this paper we propose an approach to study the reliability of piezoelectric structures and more precisely energy harvesting micro-devices dedicated to autonomous active medical implants (new generation pacemakers). The structure under test is designed as a bimorph piezoelectric cantilever with a seismic mass at its tip. Good understanding of material aging and mechanical failure is critical for this kind of system. To study the reliability and durability of the piezoelectric part we propose to establish a new accelerated methodology and an associated test bench where the environment and stimuli can be precisely controlled over a wide period of time. This will allow the identification of potential failure modes and the study of their impacts by the way of direct mechanical investigation based on stiffness and blocking force measurements performed periodically.

[发布机构] Univ Paris-Saclay - CNRS, Institut d'Electronique Fondamentale, Centre Scientifique d'Orsay, Orsay Cedex; 91405, France^1;SORIN CRM: Advanced Research Department, Clamart; 92140, France^2

[效力级别] 能源学

[关键词] Active medical implant;Blocking forces;Mechanical failures;Piezo-electric structures;Piezoelectric cantilevers;Potential failure modes;Reliability and durabilities;Test benches