Method of detecting a change in the structure of a complex...

Details Method of detecting a change in the structure of a complex... Method of detecting a change in the structure of a complex...

2005-05-31

2005-05-31

Trieu, Theresa (Department: 3748)

Rotary kinetic fluid motors or pumps

With inspection, signaling, indicating or measuring means

C415S119000, C416S19800R, C416S20100A, C416S061000, C416S031000

Reexamination Certificate

active

06899519

ABSTRACT:
A method of detecting the change in the structure of a turbine rotor uses the steps of injecting an ultrasonic signal into the turbine rotor at a first position using a first ultrasonic transducer to produce a diffuse field ultrasonic signal in the rotor; detecting the signal in the rotor at a second position using a second ultrasonic transducer measuring the time for the signal to travel from the first ultrasonic transducer to the second ultrasonic transducer and comparing the measured time for the diffuse field ultrasonic signal to travel from the first ultrasonic transducer to the second ultrasonic transducer with a stored time for the diffuse field ultrasonic signal to travel from the first ultrasonic transducer to the second ultrasonic transducer to determine if there is a change in the structure of the turbine rotor.

REFERENCES:
patent: 2966058 (1960-12-01), McSkimin
patent: 3923415 (1975-12-01), Benedict
patent: 3978712 (1976-09-01), Cowan et al.
patent: 5507183 (1996-04-01), Larue et al.
patent: 5942690 (1999-08-01), Shvetsky
patent: 2366382 (2002-03-01), None

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