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Proceedings Paper

Displacement amplifier design for an extensometer in high temperature deformation monitoring
Author(s): X. Y. Hu; J. H. Jia; S. T. Tu
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Paper 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.

Paper Details

Date Published: 20 April 2012
PDF: 8 pages
Proc. SPIE 8348, Health Monitoring of Structural and Biological Systems 2012, 834839 (20 April 2012); doi: 10.1117/12.921624
Show Author Affiliations
X. Y. Hu, East China Univ. of Science and Technology (China)
J. H. Jia, East China Univ. of Science and Technology (China)
S. T. Tu, East China Univ. of Science and Technology (China)

Published in SPIE Proceedings Vol. 8348:
Health Monitoring of Structural and Biological Systems 2012
Tribikram Kundu, Editor(s)

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