Note: A novel cantilever beam for low-frequency high performance piezoelectric geophone

Yi Xin; Hongshuai Sun; Chao Guo; Xiang Li; Yang Xu; Tingting Lin; Shuhong Wang; Cheng Wang

doi:10.1063/1.4986810

Note: A novel cantilever beam for low-frequency high performance piezoelectric geophone

Rev Sci Instrum. 2017 Jun;88(6):066105. doi: 10.1063/1.4986810.

Authors

Yi Xin¹, Hongshuai Sun¹, Chao Guo¹, Xiang Li¹, Yang Xu¹, Tingting Lin¹, Shuhong Wang², Cheng Wang²

Affiliations

¹ College of Instrumentation and Electrical Engineering, Jilin University, Changchun 130061, China.
² Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education, Heilongjiang University, Harbin 150080, China.

PMID: 28667976
DOI: 10.1063/1.4986810

Abstract

A multilayer spiral-corrugated cantilever beam was developed as an improvement for a conventional single-layer flat cantilever beam to improve the performance of a piezoelectric geophone adopting polyvinylidene fluoride film for low frequency seismic vibration measurement. The proposed structure is longer and has less stiffness compared with the conventional beam, so the piezoelectric geophone adopting the developed cantilever beam has a lower natural frequency. To confirm the validity of the design, the finite element analysis was conducted and the results showed that the natural frequency of the geophone with the multilayer spiral-corrugated cantilever beam is much lower and the corrugated structure can improve the sensitivity of the geophone.