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A Null Method for the Measurement of Load in Axial Fatigue Testing Machines

Published online by Cambridge University Press:  28 July 2016

B. F. Billing
B. F. Billing*
Affiliation:
Metallurgy Department, Royal Aircraft Establishment
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Extract

The usual method of load measurement with strain gauge load cells in a bridge circuit involves the measurement of the out of balance voltage either by the height of a trace displayed on a cathode ray oscilloscope, or the width of a band produced by a tuned galvanometer. Both involve careful regulation of the input voltage or calibration during use. The method described provides for a null balance of the bridge at any instant in the cycle of a uniformly repeated cyclic load up to 10,000 cycles per minute. An accuracy of ±½ per cent, of the capacity of the load cell is obtainable.

Type
Technical Notes
Information
The Aeronautical Journal , Volume 58 , Issue 523 , July 1954 , pp. 508 - 509
Copyright
Copyright © Royal Aeronautical Society 1954

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