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The Electrical Measurement of Strain

Published online by Cambridge University Press:  28 July 2016

S. C. Redshaw
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Extract

The electrical measurement of strain is an art which has been developed gradually over a considerable number of years. It will be realised that the electrical measurement of strain includes the electrical magnification and measurement of a strain indicated by a non-electrical pick-up, such as a mechanical strain gauge, as well as the case of pure electrical measurement in which the pick-up unit itself operates electrically.

The principal reasons for the popularity of electrical gauges are their ability to record data at a station remote from the point of application of the gauge, thus allowing gauges to be attached in positions which would be inaccessible for direct measurement by mechanical or optical means, and the high dynamic response of the electric gauge which renders the gauge invaluable for dynamic work.

Type
Research Article
Information
The Aeronautical Journal , Volume 50 , Issue 428 , August 1946 , pp. 568 - 612
Copyright
Copyright © Royal Aeronautical Society 1946

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References

1 Jerrett, R. S.: The Acoustic Strain Gauge. Journal of Scientific Instruments. Vol. 22, No. 2, p. 29.CrossRefGoogle Scholar

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3 Carter, B. C., Shannon, J. F., and Forshaw, J. R.. Measurement of Displacement and Strain by Capacity Methods. Procs. Inst. Mech. Engs. 1945. Vol. 152, No. 2 Google Scholar.

4 A. V. de Forest and H. Leaderman: The Development of Electrical Strain Gauges. N.A.C.A. Tech. Note. No. 744.

5 A. V. de Forest and H. Leaderman: Op. Cit.

6 Anon: The SR-4 Bonded Resistance Wire Strain Gauge : Baldwin-Southwark Bulletin No. 179.

7 Baumberger, R. and Hines, F.: Practical Reduction Formulas for use on Bonded Wire Strain Gages in Two-Dimensional Stress Fields. Experimental Stress Analysis, Vol. 2, No. 1, p. 113 Google Scholar.

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9 W. F. Gunning and E. G. Van Leeuwen: Resistance Wire Strain Gage Equipment for Static and Dynamic Testing. Product Engineering, July and Sept., 1945.

10 C. G. A. Woodford: Electrical Strain Gauging. Aircraft Production, May, 1944.

11 Hathaway, C. M.: Electrical Instruments for Strain Analysis. Experimental Stress Analysis, Vol. 1, No. 1, p. 83 Google Scholar.

Note on Page 607 * “Noise” was a convenient term to include all spurious voltages in the circuit due to external causes.

Note on Page 607 † See Proc.I.Mech.E. Vol. 152, p. 240.

Note on Page 608 * Except by reference to the relative phase of the output.

Note on Page 608 † See the writer's paper “Electrical Resistance Strain Gauges …” read before the Institute of Marine Engineers, March 16, 1946.

Note on Page 608 § See Pat. No. 19865/43.

Note on Page 611 * A. V. de Forest and H. Leaderman: The Development of Electrical Strain Gauges. N.A.C.A. Tech.Note, No. 744 p. 3.