Patent ID: 11946907
Assignee: PETRÓLEO BRASILEIRO S.A.—PETROBRAS
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 3:
4. A system for inspection of joints in composite tubes and of composite repairs in metallic pipelines, comprising:
a collar of acoustic transducers positioned at a predetermined distance from a joint or a repair to be inspected, and adapted to emit a series of acoustic wave pulses at different frequencies;
means of recording, during a time interval subsequent to the emission, wave displacements in each of the transducers of the collar of acoustic transducers in the form of an A-Scan; and
means of generating a flattened C-Scan image, through a common source method (CSM), for each frequency of pulse emission from the collar of acoustic transducers, and of circumferentially evaluating a particular defect revealed by the flattened C-Scan image using a predetermined threshold of comparison, in which:
a number of channels reaching the threshold are counted; and
a percentage value of a circumferential extent of the defect is counted based on a quantity of channels that reach the threshold.