Construction of an apparatus for the measurement of current induced in a long conductor by local and distant transmitters


Corporate Authors
Defence R&D Canada - Suffield, Ralston ALTA (CAN)
The purpose of this study was to design and construct an apparatus to measure the current induced in a long, buried wire by local or distant transmitters. To this end, a brief literature survey was performed to assess state-of-the-art techniques for measurement of local magnetic field, which was used to infer the current present in a buried conductor at a known depth. It was found that the ferrite coil is the most suitable to achieve the task in the frequency range from 300 kHz to 5 MHz. Several ferrite coils were constructed in order to optimize performance within this frequency range. Details are also provided regarding signal conditioning electronics. Finally, a description of the device operation is provided. The document is comprised of two separate sub-reports. The first consists of sections addressing background survey and initial testing; apparatus design; and apparatus construction, with the second describes the experimental apparatus design and the preliminary test results.

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Report Number
DRDC-SUFFIELD-CR-2012-072 — Contract Report (Final Report)
Date of publication
01 Apr 2012
Number of Pages
Electronic Document(PDF)

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