System Locates Buried Objects Marked by Electromagnetic Tags

TBMG-6449

07/02/2002

Abstract
Content

A relatively inexpensive, lightweight, durable, easy-to-operate radio-frequency (RF) instrument has been developed, along with special electromagnetic tags, for use in detecting buried objects to which the tags are attached. Each tag comprises a dipole antenna (basically, two collinear straight wires) with a passive, electrically nonlinear load between them. By virtue of the nonlinearity of the load, the antenna reradiates harmonics and/or mixer product(s) of one or more RF signal( s) transmitted by the instrument. The instrument detects one or more of the harmonics and/or mixer products and executes a time-of-arrival measurement procedure to locate the tag. The instrument is especially well suited for locating buried pipelines marked with such tags.

Meta TagsDetails
Citation
"System Locates Buried Objects Marked by Electromagnetic Tags," Mobility Engineering, July 2, 2002.
Additional Details
Publisher
Published
Jul 2, 2002
Product Code
TBMG-6449
Content Type
Magazine Article
Language
English