Xin Yi, Sun Hongshuai, Guo Chao, Li Xiang, Xu Yang, Lin Tingting, Wang Shuhong, Wang Cheng
College of Instrumentation and Electrical Engineering, Jilin University, Changchun 130061, China.
Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education, Heilongjiang University, Harbin 150080, China.
Rev Sci Instrum. 2017 Jun;88(6):066105. doi: 10.1063/1.4986810.
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.
为了改进传统的单层扁平悬臂梁，以提高采用聚偏二氟乙烯薄膜进行低频地震振动测量的压电地震检波器的性能，开发了一种多层螺旋波纹悬臂梁。与传统梁相比，所提出的结构更长且刚度更小，因此采用所开发悬臂梁的压电地震检波器具有更低的固有频率。为了确认设计的有效性，进行了有限元分析，结果表明，具有多层螺旋波纹悬臂梁的地震检波器的固有频率要低得多，并且波纹结构可以提高地震检波器的灵敏度。
