US 12,235,100 B2
Methods and systems for determining a thickness of an elongate or extended structure
Keith Vine, Brentford (GB); Thomas Vogt, Brentford (GB); and Stefan Joshua Milewczyk, Brentford (GB)
Assigned to Guided Ultrasonics Ltd, London (GB)
Appl. No. 17/052,117
Filed by Guided Ultrasonics Ltd, Brentford (GB)
PCT Filed Oct. 9, 2019, PCT No. PCT/GB2019/052865
§ 371(c)(1), (2) Date Oct. 30, 2020,
PCT Pub. No. WO2020/074895, PCT Pub. Date Apr. 16, 2020.
Claims priority of application No. 1816552 (GB), filed on Oct. 10, 2018.
Prior Publication US 2021/0108916 A1, Apr. 15, 2021
Int. Cl. G01B 17/02 (2006.01)
CPC G01B 17/02 (2013.01) 20 Claims
OG exemplary drawing
 
1. A method of determining a thickness of an elongate or extended structure using elastic waves, the method comprising:
receiving at least one time-domain signal from a transducer;
generating a frequency-domain signal in dependence upon the at least one time-domain signal;
reducing noise in the frequency-domain signal to provide a de-noised frequency-domain signal;
comparing the de-noised frequency-domain signal with at least two reference signals, each reference signal corresponding to a respective thickness;
generating a score for each reference signal, each score indicating how closely the respective reference signal matches with the de-noised frequency-domain signal;
determining which reference signal most closely matches with the de-noised frequency-domain signal based on the scores; and
determining the thickness of the elongate or extended structure based on which reference signal most closely matches the de-noised frequency-domain signal.