US 11,860,126 B2
Eddy current nondestructive evaluation device with rotating permanent magnets and pickup coils
James R. Prager, Seattle, WA (US); Timothy M. Ziemba, Bainbridge Island, WA (US); Kenneth E. Miller, Seattle, WA (US); Ilia Slobodov, Seattle, WA (US); Paul Melnik, Seattle, WA (US); Connor Liston, Seattle, WA (US); Kevin Muggli, Mountlake Terrace, WA (US); TaiSheng Yeager, Seattle, WA (US); and John G. Carscadden, Seattle, WA (US)
Assigned to EHT Ventures LLC, Seattle, WA (US)
Filed by Eagle Harbor Technologies, Inc., Seattle, WA (US)
Filed on Oct. 4, 2021, as Appl. No. 17/493,814.
Application 17/493,814 is a continuation of application No. 16/297,352, filed on Mar. 8, 2019, granted, now 11,137,372.
Claims priority of provisional application 62/640,542, filed on Mar. 8, 2018.
Prior Publication US 2022/0026393 A1, Jan. 27, 2022
Int. Cl. G01N 27/90 (2021.01); G01N 27/9013 (2021.01)
CPC G01N 27/9006 (2013.01) [G01N 27/906 (2013.01); G01N 27/9013 (2013.01)] 14 Claims
OG exemplary drawing
 
1. An eddy current nondestructive evaluation device comprising:
a rotating body;
a motor coupled with the rotating body such that the motor rotates the rotating body;
an accelerometer coupled with the rotating body that measures angular rotation of the rotating body;
a permanent magnet coupled with the rotating body;
a pickup coil coupled with the rotating body;
an integrator circuit electrically coupled with the pickup coil that integrates a voltage from the pickup coil to produce integrated voltage data; and
electrical circuitry that includes a data acquisition unit that receives integrated voltage signals from the integrator circuit, and digital storage that records the angular rotation of the rotating body with the integrated voltage signal for translating into spatial data.