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Design of Load and Strain Measuring Equipment Using Strain Gage, Instrumental Differential Amplifier and A/D Converter in a Truss System  

Baek, Tae-Hyun (School of Mechanical Engineering, Kunsan National University)
Lee, Byung-Hee (School of Mechanical Engineering, Kunsan National University)
Publication Information
Journal of the Korean Society for Nondestructive Testing / v.28, no.2, 2008 , pp. 217-224 More about this Journal
Abstract
Trusses are found in many common structures such as bridges and buildings. The truss is a fundamental design element in engineering structures and it is important for an engineer to apply the truss design to engineering structures by understanding the mechanics of truss element. In an experimental course, the experiment selves as an example of the usefulness of the Wheatstone bridge in amplifying the output of a transducer. With the apparatus described here, it is possible to obtain experimental measurements of forces in a truss member which agree within errors to predictions from elementary mechanics. The apparatus is inexpensive, easy to operate, and suitable as either a classroom demonstration or student laboratory experiment. This device is a small table-top experiment. The conventional strain measuring device is costly and complicated - it is not simple to understand its structure. Hence, strain gage and the A/D converter are assembled to come up with a load and a strain measuring device. The device was tested for measuring the strain in a loaded specimen and the results were compared to those predicted by theory of mechanics.
Keywords
Strain Gage; Strain Measurement; Wheatstone Bridge; A/D Converter; Truss;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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1 T. H. Baek and M. S. Kim, 'Computer simulation of photoelastic fringe patterns for stress analysis,' Lecture Notes in Computer Science, Issue Volume 3398/2005, Springer- Verlag, pp. 214-221, (2005)
2 ABAQUS/Standard, Example Problems Manual, Hibbitt, Karlsson & Sorensen, Inc., Pawtucket, RI., USA, http://abaqus.com
3 A. S. Khan and X Wang, Strain Measurements and Stress Analysis, Prentice Hall, pp. 30-93, (2001)
4 백태현, 유승현, 최영외 공역, 정역학(Statics by S. D. Sheppard and B. H. Tongue), 도서출판 인터비젼, pp. 467-496, (2006)
5 Application Note, AN-244 : A User's Guide to IC Instrumental Amplifiers, Analog Devices, Inc., http://www.analog.com
6 Tech Note, TN 507 : Wheatstone Bridge Nonlinearity, Vishay Measurements Group. http://www.vishay.com/brands/measurements-group/guide/tn/tn507
7 D. Watson, Application Note, AN-052 : Tips for Using Single Chip 3 Digit A/D Converters, Intersil, http://www.intersil.com/converters
8 백태현, '정밀응력 측정을 위한 광탄성프린지 해석법', 한국정밀공학회지, 제24권, 제3호, pp. 31-39, (2007)   과학기술학회마을
9 J. W. Dally and W. F. Riley, Experimental Stress Anaysis, 3rd Ed., McGraw-Hill, Inc., pp. 164-261, (1991)
10 한응교, 고준빈, 스트레인 게이지를 위한 계측방법, 도서출판 인터비젼, (2001)
11 C. Kitchin and L. Counts, A Designer's Guide to Instrumental Amplifiers, 3rd ed. Analog Devices, Inc., (2006) http://www.analog.com