Process and device for the positioning of a tool in relation to

Details Process and device for the positioning of a tool in relation to Process and device for the positioning of a tool in relation to

1992-12-03

1993-11-16

Walsh, Donald P.

Induced nuclear reactions: processes, systems, and elements

Testing, sensing, measuring, or detecting a fission reactor...

Position detection

376248, 376262, G21C 1700

Patent

active

052630595

ABSTRACT:
Process and device for the positioning of a tool (10) carried by a manipulating arm displaceable in three respectively perpendicular directions of space in relation to the vertical axis of a tube carried by the tube plate of a steam generator for a nuclear reactor. The process involves arranging symmetrically on the arm a set of at least three lighting sources (17) each supplying a light beam directed tangentially towards the periphery of a tube (5), retransmitting, via an optical assembly (18) also carried by the arm, the images of three specific points of the tube illuminated by the sources in the direction of a video monitor, the screen (21) of which comprises three reticles (42, 43, 44) delimiting the actual contour of the tube, and then bringing these images into coincidence with the reticles in order to center the axis (28) of the tools strictly on the axis (35) of the tube.

REFERENCES:
patent: 4575185 (1986-03-01), Wentzell et al.
patent: 4729423 (1988-03-01), Martin
patent: 4795606 (1989-01-01), Fenemore et al.
patent: 5089684 (1992-02-01), Griffaton
patent: 5091141 (1992-02-01), Feuillet
"Applied Optics"-p. 2837,-vol. 28, No. 14-Jul. 15, 1989.

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