Measuring and testing – Vibration – By mechanical waves
Patent
1998-07-02
2000-08-22
Chapman, John E.
Measuring and testing
Vibration
By mechanical waves
73 1201, 73598, G01N 2904
Patent
active
061054305
ABSTRACT:
An acoustic travel time tomography system enables determining of physical properties of a dam, or a like concrete mass. The system includes a plurality of acoustic sensors, positioned on the dam at a plurality of spaced sensor locations which are known relative to each other, for producing output data responsive to the detection thereby of acoustic waves generated in the dam. An impact source produces an impact at an impact location which is known relative to the sensor locations so as to generate acoustic waves in the dam for detection by the sensors. A data processing unit acquires output data from the sensors produced responsive to acoustic waves generated by the impact source and analyzes this output data, together with data related to the relative locations of the sensors and the impact source, to determine physical properties of the dam.
REFERENCES:
patent: 4163393 (1979-08-01), Gotierrez et al.
patent: 4429575 (1984-02-01), Akishika
patent: 5165270 (1992-11-01), Sansalone et al.
J. Krautkramer et al., Ultrasonic Testing of Materials(Springer-Verlag, New York, 1983), pp. 558-563, 1983.
Bond Leonard J.
Kepler William F.
Chapman John E.
Koltos E. Philip
The United States of America as represented by the Secretary of
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