Measuring and testing – Vibration – By mechanical waves
Patent
1977-10-11
1979-02-20
Goldstein, Herbert
Measuring and testing
Vibration
By mechanical waves
307306, 361 19, G01N 2904
Patent
active
041400216
ABSTRACT:
The explosion or destruction of a superconducting system which may occur when an abnormal state arises in any part of the system if allowed to develop into a catastrophic quenching is prevented by providing the system with an acoustic wave detecting device adapted to detect the acoustic waves emitted upon occurrence of the abnormal state, analyze the acoustic waves detected in the form of signals to determine the extent of the abnormal state, foretell stepwise the approach of catastrophic quenching and, on the basis of the data thus obtained, effect proper feedback to the system.
REFERENCES:
patent: 3214637 (1965-10-01), Persson
patent: 3579035 (1971-05-01), Burnier et al.
patent: 3875381 (1975-04-01), Wingfield et al.
patent: 4009463 (1927-02-01), Vercellotti
Dunegan et al., "Acoustic Emission" in Research/Development, 5/71, pp. 20-23.
Nomura Harehiko
Takahisa Kiyoshi
Agency of Industrial Science & Technology
Goldstein Herbert
Ministry of International Trade & Industry
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