Investigation of resonant piezoelectric structure for high mechanical force sensing

International audienceThe aim of this paper is to investigate the feasibility of a 1D tensile/compression force sensor for mechatronic systems. The main issue to address is the sensing of the static force component, dynamic force sensing is also required. Measurements on a test bench show that for a given vibration mode of the piezoelectric structure, the applied force (stress) has an effect on the material frequency response (electrical admittance). Furthermore, the sensitivity depends on the surrounding materials used in the resonant structure. Key elements are drawn based on the measurements to support modeling and optimal design activities