A radio frequency detector comprising RF transmit, receive and cable avoidance tool antennas

摘要

One aspect of the invention relates to a detector comprising a radio-frequency (RF) transmit antenna 110; an RF receive antenna 120; and a cable avoidance tool (CAT) antenna 130. Another relates to an underground utility RF tag comprising an RF coil, RF circuitry connected to the coil and a housing wherein the RF coil and circuitry resonate at a predetermined frequency and the housing is arranged such that no air is in contact with the coil or circuitry. Another aspect relates to an RF tag comprising a mounting section attachable to the housing, and having a seating portion suitable for seating on a metal asset wherein the seating portion is spatially separated from the housing when the mounting is attached to the housing. Yet another aspect relates to a method of determining a location of an RF detector comprising receiving GPS information identifying an approximate location of the detector, receiving information from the detector representing a signal from an underground RF tag, the signal from an underground RF tag, and determining the location based on the approximate location and previously recorded information on tag locations.