Wireless communication combined damage detection using ultrasonic guided waves through symmetrical notches

Archive ouverte : Communication dans un congrès

Bahouth, Rudy | Benmeddour, Farouk | Moulin, Emmanuel | Assaad, Jamal

Edité par HAL CCSD

International audience. Ultrasonic guided waves such as Lamb waves have been widely studied in Non- Destructive Testing and Structural Health Monitoring applications for damage detection. Recently, the use of those waves in communication through solid metallic channels has gained popularity due to the huge need in some industrial sectors such as nuclear, railway, aerospace and smart vehicles. This paper aims to combine the concept of wireless communication with the damage detection while using Lamb waves through healthy and damaged aluminum plates with Symmetrical Notches. For this sake, the finite element software Elmer is used to simulate the propagation of guided waves in healthy and damaged aluminum plates with symmetrical notches having depths varying from 1 to 5 mm. The concept of wireless communication using ultrasonic guided waves combined with damage detection is launched based on two concepts. The first one is the modes separation of the first wave-packet for S0 mode selection. The second one is the cross- correlation algorithm combined with Binary Phase Shift Keying modulation using only the S0 mode for the first binary digit. Experimental tests are carried out to validate the combined communication and damage detection system. Experimental and simulated results have proven that the binary message is fully recovered simultaneously with the detection of symmetrical notches. The detection is represented as a linear drop in the similarity percentage while increasing the damage depth while reaching a bit rate of 200 kbits/s.

• Contient
• Sujet
• Description
• Oeuvre