Method and apparatus for detection of structural failure
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United States of America Patent
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Oct 10, 2017
Grant Date -
Oct 30, 2014
app pub date -
May 12, 2014
filing date -
May 4, 2007
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A detection system for identifying deterioration in a structure is provided that has acoustic sensors that receive acoustic emission waves. The acoustic emission wave detected by the acoustic sensor is identified as a hit. An analysis circuit is present that identifies an A state, a B state, and a C state. The B state has increased hit activity from the A state where a rate B is greater than a rate A by a factor of f1. The C state has increased hit activity from the B state where a rate C is greater than the rate A by a factor of f2. An alarm is activated when an amount of time that the C state is identified as being present reaches a value of TM, or alternatively when a threshold value based upon of the number of hits and time in the C state is reached.
First Claim
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International Classification(s)
- G01H:MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC....
- G08B:SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; A....
- G01M:TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR S....
- G01L:MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL ....
- G01N:INVESTIGATING OR ANALYSING MATERIALS BY DETERMININ....
- F16B:DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL E....
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