US 12,326,468 B2
Portable device with measuring leg for display of noise information in coordination with measured distance and transmission frequency selection
Loc Viet Lam, Renton, WA (US); and Albert W. Chau, Woodinville, WA (US)
Assigned to Merlin Technology Inc., Kent, WA (US)
Filed by Merlin Technology Inc., Kent, WA (US)
Filed on Sep. 21, 2023, as Appl. No. 18/371,363.
Application 14/277,873 is a division of application No. 12/497,990, filed on Jul. 6, 2009, granted, now 8,729,901, issued on May 20, 2014.
Application 18/371,363 is a continuation of application No. 17/728,980, filed on Apr. 26, 2022, granted, now 11,802,900.
Application 17/728,980 is a continuation of application No. 17/344,895, filed on Jun. 10, 2021, granted, now 11,320,474, issued on May 3, 2022.
Application 17/344,895 is a continuation of application No. 16/599,110, filed on Oct. 10, 2019, granted, now 11,047,896, issued on Jun. 29, 2021.
Application 16/599,110 is a continuation of application No. 15/685,790, filed on Aug. 24, 2017, granted, now 10,598,712, issued on Mar. 24, 2020.
Application 15/685,790 is a continuation of application No. 14/277,873, filed on May 15, 2014, granted, now 10,520,536, issued on Dec. 31, 2019.
Prior Publication US 2024/0019478 A1, Jan. 18, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. G01R 29/26 (2006.01); G01V 3/15 (2006.01)
CPC G01R 29/26 (2013.01) [G01V 3/15 (2013.01)] 6 Claims
OG exemplary drawing
 
1. For use in conjunction with a system in which a transmitter is moved through the ground in a region during an operational procedure while transmitting a transmitter signal having a transmission frequency and said transmission frequency is selectable in a transmission frequency range and said region includes electromagnetic noise that can vary within said region and across said transmission frequency range, an apparatus comprising:
an extension leg having a first, distal end and an opposing end;
a measuring wheel supported for rotation at the distal end responsive to rolling upon a surface of the ground;
a sensor supported by the distal end to detect the rotation and generate a sensor output responsive to the rolling;
a portable device comprising:
a housing configured for removable attachment of the opposing end of the extension leg;
a receiver carried by the housing configured to measure the electromagnetic noise at least in said transmission frequency range in an absence of said transmitter signal; and
a processor for receiving the sensor output and for referencing the electromagnetic noise to a measurement path as the measuring wheel is rolled along the measurement path; and
a display for displaying the electromagnetic noise as measured on the measurement path in the transmission frequency range.