NASA NTRS · 19840000336
Acousto-optic Extensometer for Bolts
Abstract
Bolt torque or tension deduced from non contacting measurements. Pulsed Laser induces shockwave in bolthead while continuous-wave acousto-optic detector monitors distortion produced by shock. Shock travel time measured to determine bolt length. Solid-state position detector relatively inexpensive and keeps down cost of extensometer.
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Maram, J., Kuhr, G.. 1985-04-01. Acousto-optic Extensometer for Bolts. https://ntrs.nasa.gov/citations/19840000336
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