Measuring and testing – Vibration – By mechanical waves
Patent
1992-03-06
1994-01-04
Williams, Hezron E.
Measuring and testing
Vibration
By mechanical waves
73620, 73625, 73634, 73644, G01N 2904
Patent
active
052750523
ABSTRACT:
An ultrasonic inspection system uses a submerged ultrasonic transducer to provide an ultrasonic beam focused to a small spot on a submerged surface of a member to be internally inspected. By use of a focused beam projected through a fluid, such as water, to a submerged surface, the ultrasonic energy is efficiently coupled to a surface area which may be small and/or of irregular or curved shape. Systems and methods for inspecting turbine rotor blade tenons permit a turbine rotor with hundreds of blades to be rotated past a submerged transducer with automatic recording and processing of ultrasonic echoes to develop two-dimensional color images of internal portions of tenons at which cracks may typically occur. Automated adjustment of beam focusing of a transducer including an array of elements and threshold monitoring of fault-indicative echo returns are provided for.
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Luttrell Michael G.
O'Maley James B.
Solomon Kenneth R.
Ashraf Nashmiya
New York Institute of Technology
Robinson Kenneth P.
Williams Hezron E.
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