Method and arrangement for enabling the detection of the locatio

Details Method and arrangement for enabling the detection of the locatio Method and arrangement for enabling the detection of the locatio

1984-02-03

1986-02-25

Strecker, Gerard R.

Electricity: measuring and testing

Of geophysical surface or subsurface in situ

For small object detection or location

G01V 306, G01V 312, G01R 1915

Patent

active

045730164

ABSTRACT:
An underground continuous length item is detected by preparing an electrically conductive wire constituted by covering a flexible metallic core wire with an outer coating layer made of a flexible and electrically conductive high polymeric organic material, positioning the electrically conductive wire under the ground along the underground continuous length item, supplying a high frequency current to the electrically conductive wire, and receiving electromagnetic waves emitted therefrom, thereby detecting the location of the underground continuous length item. Since electric current is propagated through the ground via the coating layer of the wire upon supply of high frequency power to the wire, it becomes possible to detect from the ground surface the location of the continuous length item in the event that the wire is cut.

REFERENCES:
patent: Re36393 (1980-09-01), Sherlock
patent: 2597741 (1952-05-01), Macey
patent: 3600674 (1971-08-01), Brea et al.
patent: 3666876 (1972-05-01), Forster
patent: 3975735 (1976-08-01), McCullough et al.
patent: 3991363 (1976-11-01), Lathrop
patent: 4449098 (1984-05-01), Nakamura et al.
"Plastic Main `Painted` Off Reel", American Gas Journal, Jan. 1965, pp. 38-41.
"Four All-Plastic Distribution Systems . . . `Twins`", American Gas Journal, May 1965, pp. 59-61.
Young, "Measuring the Depth of Buried Cable", Bell Laboratories Record, Nov. 1965, pp. 399-401.

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