Apparatus for marking individual points of an underwater constru

Details Apparatus for marking individual points of an underwater constru Apparatus for marking individual points of an underwater constru

1988-09-20

1989-12-19

Tokar, Michael J.

Communications, electrical: acoustic wave systems and devices

Distance or direction finding

With plurality of transducers

324216, G01S 518

Patent

active

048887455

ABSTRACT:
For marking and finding weld seams to be investigated under water ultrasonic transmitters 54 are provided which have luminous or light-reflecting characters 58. The diver brings an ultrasonic receiver 60 up to the ultrasonic transmitter 54. For more exact location determination along the weld seam 52 a tape is provided which is disposed along the weld seam 52 and has elements arranged in coded manner.

REFERENCES:
patent: 4221132 (1980-09-01), Poole
patent: 4628737 (1986-12-01), Charles et al.
patent: 4759211 (1988-07-01), Longley-Cook

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