US 12,241,869 B2
Passive measurement of acousto-elastic waves
Tom Druet, Le Kremlin Bicetre (FR); Olivier Mesnil, Orsay (FR); and Bastien Chapuis, Tresserce (FR)
Assigned to COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES, Paris (FR)
Appl. No. 17/780,480
Filed by COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES, Paris (FR)
PCT Filed Dec. 16, 2020, PCT No. PCT/EP2020/086460
§ 371(c)(1), (2) Date May 26, 2022,
PCT Pub. No. WO2021/122774, PCT Pub. Date Jun. 24, 2021.
Claims priority of application No. 1915243 (FR), filed on Dec. 20, 2019.
Prior Publication US 2023/0003692 A1, Jan. 5, 2023
Int. Cl. G01N 29/14 (2006.01); G01N 29/04 (2006.01); G01N 29/06 (2006.01); G01N 29/24 (2006.01); G01N 29/265 (2006.01); G01N 29/46 (2006.01); G01N 29/50 (2006.01)
CPC G01N 29/14 (2013.01) [G01N 29/043 (2013.01); G01N 29/0672 (2013.01); G01N 29/069 (2013.01); G01N 29/2412 (2013.01); G01N 29/265 (2013.01); G01N 29/50 (2013.01); G01N 29/46 (2013.01); G01N 2291/0231 (2013.01); G01N 2291/0234 (2013.01); G01N 2291/0258 (2013.01); G01N 2291/106 (2013.01); G01N 2291/2634 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A system for analyzing a tubular structure comprising:
at least two electromagnetic-acoustic transducers (EMAT), being sensors;
computation or memory resources, that are accessed locally or remotely and that are configured to decide a time to measure the ambient noise in the tubular structure and to determine, for at least a pair of sensors, on the basis of the diffuse acousto-elastic noise present in the structure, a function representing the impulse response of the tubular structure, wherein the two electromagnetic-acoustic transducers (EMAT) are supported by two rings disposed around the tube to be inspected, and being located at a configurable distance, being a liftoff, from the tubular structure.