Detecting buried pipeline depth and location with electromagneti

Details Detecting buried pipeline depth and location with electromagneti Detecting buried pipeline depth and location with electromagneti

1983-09-02

1985-09-17

Strecker, Gerard R.

Electricity: measuring and testing

Of geophysical surface or subsurface in situ

For small object detection or location

G01V 311, G01V 3165

Patent

active

045423440

ABSTRACT:
The depth and lateral offset position of an underground pipeline or the like is calculated by a surface located instrument carrying two spaced sets of orthogonal antennas sensing electromagnetic energy induced in and radiated from the pipeline. The resulting four signals are compared in amplitude to derive by simple triangulation calculations the depth and offset distances in a simple computer-display unit. Thus a set of continuous reading may be made automatically by a self-contained portable unit as an operator tracks the pipeline to make a survey. The readings may be recorded upon a medium advanced by a measuring instrument as a survey progresses along a pipeline.

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patent: 4390836 (1983-06-01), Bruce et al.

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