High ''G'' calibration of accelerometers
The relation between the strain in an elastic wave traveling along a slender rod and the acceleration of a free end as the wave reflects from that end is given by the equation epsilon = 1/(2c)integral adt, where a = acceleration, c = wave velocity, and epsilon = strain in the rod. An air gun and projectiles have been built to induce the strain wave in the rod. The system was designed to achieve accelerations of 100,000 g's and pulse lengths of from 50 to 150 micro-seconds. An instrument has been built to compare the peak values of the strain as recorded by a foil strain gage and the integral of the acceleration as recorded by an accelerometer fastened to the free end of the rod. The instrument is designed in such a way that the calibration constant of the accelerometer is displayed immediately on a digital voltmeter. Also, in conjunction with a time interval counter, the instrument measures the wave velocity, c. (auth)
- Research Organization:
- California Univ., Berkeley (USA). Coll. of Engineering
- OSTI ID:
- 7366953
- Report Number(s):
- UCRL-13670
- Country of Publication:
- United States
- Language:
- English
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