文献类型：期刊文献

英文题名：Displacement amplifier design for an extensometer in high temperature deformation monitoring

作者：Hu, X.Y.[1]; Jia, J.H.[1]; Tu, S.T.[1]

机构：[1] MOE Key Laboratory of Pressure Systems and Safety, School of Mechanical and Power Engineering, East China University of Science and Technology, Shanghai 200237, China

年份：2012

卷号：29

起止页码：1872

外文期刊名：Procedia Engineering

收录：EI(收录号：20121214882876)

语种：英文

外文关键词：Amplifiers (electronic) - Deformation - Light amplifiers - Data handling - Hinges

摘要：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. ? 2011 Published by Elsevier Ltd.