Magnification Ratio of Mechanical Displacement Amplifier in Sensing Device

• 作 者: Jia Jiuhong Liao Zuoyu Hu Xiaoyin Tu Shandong
• 机 构: Key Laboratory of Pressure Systems and Safety of Ministry of Education,School of Mechanical and Powe
• 出 处: Transactions of Nanjing University of Aeronautics and Astron
• 发表日期: 2017年03期
• 关键词: design method magnification ratio bridge-shaped amplifier sensing device

In order to monitor deformation of high temperature components for a long time,a sensing device integrating a bridge-shaped mechanical displacement amplifier has been designed.This sensing device has higher resolution and accuracy than conventional extensometers.However,the relation between the magnification ratio and the structure size of the displacement amplifier is a bottleneck of sensing device design.Addressing this,the magnification ratio of a mechanical displacement amplifier is analytically derived based on its geometry structure.Six prototypes of the displacement amplifier made in propathene are manufactured,and an experimental system is set up to validate the accuracy of the established magnification ratio equation.Theoretical magnification ratios and experimental magnification ratios are compared and agree well,which verifies that the proposed equation is reliable.This analytical equation provides an effective design method for bridge-shaped mechanical displacement amplifiers with an expected magnification ratio.

In order to monitor deformation of high temperature components for a long time, a sensing device integrating a bridge-shaped mechanical displacement amplifier has been designed. This sensing device has higher resolution and accuracy than conventional extensometers. However, the relation between the magnification ratio and the structure size of the displacement amplifier is a bottleneck of sensing device design. Addressing this, the magnification ratio of a mechanical displacement amplifier is analyzed derived based on its geometry structure. Six prototypes of the displacement amplifier made in propathene are manufactured, and an experimental system is set up to validate the accuracy of the established magnification ratio equation. optical magnification ratios and experimental magnification ratios are compared and agree well, which verifies that the proposed equation is reliable. This analytical equation provides an effective design method for bridge-shaped mechanical displacement amplifie rs with an expected magnification ratio.