Measuring and testing – Vibration – By mechanical waves
Patent
1983-07-25
1985-07-23
Birmiel, Howard A.
Measuring and testing
Vibration
By mechanical waves
73603, 73619, G01N 2900
Patent
active
045302421
ABSTRACT:
There is disclosed herein a movable, ultrasonic transducer array for use in an ultrasonic inspection system that employs a signal detector and display of the liquid crystal cell type. The movable array uniformly insonifies the object to be inspected and is particularly suitable for inspecting large objects or large areas of an object. The array may include a plurality of sending or emitting transducers which are held in substantially parallel alignment so that their transmission or radiation axes are parallel. The array is part of an assembly which includes a support for holding the transducers and a drive system for moving the array and support along a predetermined path.
In a first specific embodiment, the array is mounted on a support which moves along a circular path while maintaining the relative horizontal and vertical positions of the transducers. That movement is accomplished by use of a drive and linkage system which provides for an eccentric-like movement. In a second embodiment, an array is provided in which the support rotates through a circular path, but the relative horizontal and vertical positions of the transducers changes. This may be referred to as a planetary-type movement. In addition, other movements such as linear translation can be provided.
It has been found that the ultrasonic beam so generated produces a large and uniform insonifying beam.
REFERENCES:
patent: 3837423 (1974-09-01), Mailer
patent: 3979711 (1976-09-01), Maginness et al.
patent: 4304133 (1981-12-01), Feamster, III et al.
patent: 4434659 (1984-03-01), Kurtz et al.
patent: 4437468 (1984-03-01), Sorenson et al.
Birmiel Howard A.
Raj Technology, Inc.
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