Measuring and testing – Vibration – Sensing apparatus
Patent
1997-11-25
1999-08-24
Brock, Michael
Measuring and testing
Vibration
Sensing apparatus
73659, 73593, G01N 2910, G01N 2924
Patent
active
059426900
ABSTRACT:
An ultrasonic stroboscope is used to inspect an object rotating at a first frequency to determine if the rotating object has any defects. The ultrasonic stroboscope includes a first acoustic transducer spaced apart from the rotating object. The first transducer is configured to radiate ultrasonic energy at the rotating object at a second frequency. The second frequency is substantially related to a sub-harmonic of the first frequency so that the rotating object appears acoustically substantially still. A second acoustic transducer is used to sense a reflection of the ultrasonic energy from a defect in the rotating object. The second transducer translates the sensed reflection into at least one reflection signal. A user interface is coupled to the reflection signal.
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Brock Michael
Miller Rose M.
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