Displacement amplifier design for an extensometer in high temperature deformation monitoring

X. Y. Hu; J. H. Jia; S. T. Tu

doi:10.1117/12.921624

20 April 2012 Displacement amplifier design for an extensometer in high temperature deformation monitoring

X. Y. Hu, J. H. Jia, S. T. Tu

Proceedings Volume 8348, Health Monitoring of Structural and Biological Systems 2012; 834839 (2012) https://doi.org/10.1117/12.921624
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2012, San Diego, California, United States

Abstract

In this paper a displacement amplifier is designed for integrating an amplifier into an extensometer to improve precision and resolution of the extensometer for strain monitoring of high temperature components. Firstly the displacement amplifier is investigated and the requirements for displacement amplifiers applied for high temperature deformation monitoring is summarized. Secondly a lever-type mechanical displacement amplifier for the extensometer is designed and the amplification ratio is derived. At last, feasibility of the designed displacement amplifier is analyzed from loading force, amplification ratio and environmental temperature under harsh environment for online strain monitoring using FEA. Analyzed results show that the loading force coming from the torque moment of the flexure hinge can be forced by the extensometer rods, amplification ratio equation is proved correct, and the thermal effect on accuracy can be corrected in data processing.

Citation Download Citation

X. Y. Hu, J. H. Jia, and S. T. Tu "Displacement amplifier design for an extensometer in high temperature deformation monitoring", Proc. SPIE 8348, Health Monitoring of Structural and Biological Systems 2012, 834839 (20 April 2012); https://doi.org/10.1117/12.921624

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available