Design Optimization of Bulk Piezoelectric Acceleration Sensor for Enhanced Performance

Abstract

While seeking to achieve high performances of a bulk piezoelectric acceleration sensor, we investigated the behavior of the design variables of the sensor components and optimized the sensor design using a numerical simulation based on piezoelectric analysis and metamodeling. The optimized results demonstrated that there was an exponential dependency in the trade-off relation between two performance indicators, the electric voltage and the resonant frequency, as induced by the design characteristics of the sensor. Among the design variables, a decrease in the base height and epoxy thickness and an increase in the piezo element’s inner diameter had a positive effect on two performances, while the head dimensions (diameter and height) exhibited the opposite effect on them. The optimal sensor designs are proposed within the valid range of resonant frequency (25–47.5 kHz). Our redesign of a commercial reference sensor improved the resonant frequency by 13.2% and the electric voltage by 46.1%.

A Theoretical and Empirical Investigation of Design Characteristics in a Pb(Zr,Ti)O3-Based Piezoelectric Accelerometer

“…Details on these optimization processes as well as all the material data used for numerical analysis were described in ref. [ 10 ].…”

“…Our recent numerical investigation found that in constructing an accelerometer, the performances of these two characteristics were significantly influenced by the design factors (geometry, dimensions and configuration) of the components (e.g., seismic mass, piezo element, tail, base and insulating layer etc.) [ 10 ]. To obtain better performances, moreover, it was necessary to carefully choose the component design by optimizing the design variables of each component, which was possible by thoroughly understanding the relationship between the design characteristic and the physical functionality.…”

“…In this study, we extended our previous numerical work [ 10 ] to a real system, offering important information about the role of the design characteristics on the physical functionalities of a compression-mode accelerometer. Given the valid range of the meta model produced using the design of experiments (DOE) technique [ 10 ], we chose four set values of resonant frequency between 25 and 40 kHz to numerically optimize the accelerometer design via metamodeling. We obtained the four sets of accelerometer designs with a variation of the resonant frequency and successfully fabricated and assembled the accelerometer modules using the proposed designs.…”

Friction and Wear Mechanism Analysis of Polymer Flexible Cable Using a High Natural Frequency Piezoelectric Sensor

“…In Figure 1b, the tester included three main parts: the ambient temperature control section, the cable-grinding drive, and the cable friction force piezoelectric sensor. [15][16][17]. The surface and chips of the wear obtained from the test were analyzed by a microscope.…”

“…The cable's insulation layer is made of polyvinyl chloride-based polymer. A flexible cable friction and wear test system designed to carry orthogonal friction experiments, and the friction forces of the cables have been recorded by the piezoelectric sensor [15][16][17]. The surface and chips of the wear obtained from the test were analyzed by a microscope.…”