Measuring and testing – Specimen stress or strain – or testing by stress or strain... – Threaded fastener stress
Patent
1997-09-25
1999-10-26
Dombroske, George
Measuring and testing
Specimen stress or strain, or testing by stress or strain...
Threaded fastener stress
F16B 3102
Patent
active
059707984
ABSTRACT:
An ultrasonic bolt gage is described which uses a cross-correlation algorithm to determine a tension applied to a fastener, such as a bolt. The cross-correlation analysis is preferably performed using a processor operating on a series of captured ultrasonic echo waveforms. The ultrasonic bolt gage is further described as using the captured ultrasonic echo waveforms to perform additional modes of analysis, such as feature recognition. Multiple tension data outputs, therefore, can be obtained from a single data acquisition for increased measurement reliability. In addition, one embodiment of the gage has been described as multi-channel, having a multiplexer for performing a tension analysis on one of a plurality of bolts.
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Gleman Stuart M.
Rowe Geoffrey K.
Borda Gary G.
Dombroske George
The United States of America as represented by the Administrator
Thompson Jewel V.
Vrioni Beth A.
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