A wire/extensometer method for measuring small displacementsA method has been developed for making precise point-to-point displacement measurements on critical structures under structural, thermal, or gravity loading. The technique consists of attaching the gauge to the structure at one point, and connecting it to a second point on the structure by a thin (0.25 mm) tungsten wire. The wire provides a dual function: in addition to physically connecting the gauge to a remote point, it provides a calibrating function. Tests have demonstrated that measurements can be made within a micron over a length of a meter or two, even in the presence of severe thermal shock, such as exposure to a sun gun or to a refrigerant spray.
Document ID
19740053282
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Wilson, M. W. (NASA Goddard Space Flight Center Test and Evaluation Div., Greenbelt, Md., United States)
Date Acquired
August 7, 2013
Publication Date
January 1, 1974
Subject Category
Instrumentation And Photography
Meeting Information
Meeting: Annual Meeting on the Cost effectiveness in the environmental sciences