Design, Simulation, and Fabrication of Piezoelectric based detection of Doctor’s Hand Tremor

Abstract

In this study, we present a new vibration energy harvester that aims to harness the involuntary hand movements associated with vibration. The device features a special single-beam design with a piezoelectric component located at the principal point. We used both experimental and computational methods to analyze the performance of the harvester in the study. In practical tests, a rather low resonant frequency of 7.5 Hz emerged, which is consistent with the 8.0373 Hz predicted by the Finite Element Method (FEM) simulation. Variations in material properties and manufacturing tolerances result in these small variations. A mass-spring mechanism combined with a cantilever beam concept forms the basis of the combined design. This arrangement increases the bending moment of the beam, maximizing the energy conversion efficiency. The results of experimental evaluation in an open-loop environment were encouraging. At a resonant frequency of 7.5Hz, the device generated an impressive peak-to-peak voltage of 11.44V. When connected to an ideal load resistance of 470kΩ, the maximum output power of the combine was 63.89μW. These results show how our system can be used to harvest energy from low-frequency vibrations, especially those caused by physical impact. The combine's ability to generate large amounts of energy with small hand movements indicates potential applications in medical and wearable technology.