Supervisor:
Southwest Ordnance Industry Bureau
Organizer:
Chongqing Ordnance Industry Society
Chongqing University of Technology
Chongqing University of Technology
Ultrasonic identification of metal materials based on linear prediction analysis
| DOI: | 10.11809/bqzbgcxb2023.10.042 |
| Keywords: | ultrasonic backscattering; linear prediction analysis; Pauta criterion; ultrasonic fingerprints; identification threshold |
| Abstract: | Microstructure of metal material results in different backscattering of ultrasonic wave, and ultrasonic signals are impacted by the randomness of the size and radial distribution of metal grains. Ultrasonic signals of different individuals are diverse even if their materials are the same. In this paper, the linear prediction coefficients of ultrasonic signals of metal samples are extracted as ultrasonic fingerprints, and the identification threshold is determined based on Pauta criterion. The identification results demonstrate that the method based on linear prediction analysis could identify metal individuals quickly and accurately. This method provides a reference value for the identification and protection of precious metal materials and cultural relics. |
| Issue: | Vol. 44 No. 10 (2023) |
| Published: | 2023-10-28 |
| PDF HTML | |