Communications – electrical: acoustic wave systems and devices – Echo systems – Distance or direction finding
Patent
1991-08-15
1993-05-25
Pihulic, Daniel T.
Communications, electrical: acoustic wave systems and devices
Echo systems
Distance or direction finding
367 96, 73634, 376252, G01S 1500
Patent
active
052146162
ABSTRACT:
The inspection head component of a manipulator employed in the inspection of the interior surface of a nuclear reactor vessel is aligned to an optimum orientation when positioned at a local surface to be inspected. This alignment is carried out by generating ranging information with respect to the local surface using ranging ultrasonic transducers positioned upon the inspection head. The propagation interval of the acoustic signal emitted by these ranging transducers is timed and quantified to develop orientation error signals. Such development is carried out in conjunction with known values for the local surface being inspected and in conjunction with a sequence of data collection at the position. The inspection head is pivotally mounted upon the manipulator so as to be movable about at least two axes by inspection head positioning assemblies which may be provided, for example, as stepper-motors and associated translational movement components.
REFERENCES:
patent: 4196049 (1980-04-01), Burns et al.
patent: 4881177 (1989-11-01), McClean et al.
Dykes Edward R.
Terhune James H.
Beulick John S.
General Electric Company
Pihulic Daniel T.
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