Measuring and testing – Vibration – By mechanical waves
Patent
1977-07-05
1978-07-25
Queisser, Richard C.
Measuring and testing
Vibration
By mechanical waves
73623, 73642, G01N 2904
Patent
active
041022068
ABSTRACT:
Device for the inspection of tubes by ultrasonics comprising a probe constituted by an ultrasonic transducer fixed to a mirror which receives the ultrasonic wave emitted by the transducer and centered on the axis of the probe, means for moving the probe within the tube to be inspected and means for detecting the ultrasonic echos reflected by the tube, wherein it also comprises means for introducing an acoustic coupling liquid into the volume between the tube, transducer and mirror when the probe penetrates the tube to be inspected and for discharging said liquid when the probe leaves the tube, said means substantially comprising a flexible pocket reservoir filled with liquid and placed in the lower part of the probe and connected to the volume to be supplied with liquid, whereby said pocket is flattened when it penetrates the tube to be inspected following the probe, which has the effect of expelling part of the liquid contained therein in the direction of said volume, the said liquid returning by gravity into the pocket when the latter leaves the tube under inspection and reassumes its shape.
This device can be used for detecting transverse or longitudinal faults in tubes, as well as for measuring their diameter and thickness.
REFERENCES:
patent: 3028752 (1962-04-01), Bacon
patent: 3121324 (1964-02-01), Cowan
patent: 3916675 (1975-11-01), Perdijon
patent: 4008603 (1977-02-01), Paulissen
Beauchamp John P.
Commissariat a l''Energie Atomique
Queisser Richard C.
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