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AssigneeMerlin Technology, Inc.
InventorsRudolf Zeller, Gary Garrabrant, Timothy Bayliss, John E. Mercer
Estimating the term…
A system includes a transmitter for use in conjunction with a horizontal directional drilling system that transmits a multi-bit symbol stream that characterizes sensor symbols for receipt by an aboveground portable device. The portable device receives the symbol stream for aboveground recovery of the sensor signals. The transmitter can precisely place the symbol frequencies at least to avoid a noise environment, as well as to avoid powerline harmonics, and can utilize wave shaping for transmitted symbols at least to provide for transmission power control, spectral content control and wideband antenna matching. The receiver can measure the noise environment to identify the symbol frequencies used by the transmitter. The noise can be scanned at an incremental resolution across a wide frequency bandwidth for display or automatic symbol frequency selection.
A system for use in horizontal directional drilling that includes a drill string that extends from a drill rig to an inground tool such that extension and retraction of the drill string moves the inground tool through the ground during an inground operation, said system comprising:
Dependencies are inferred from the claim text.