Development of Wireless Ultrasonic Propagation Imaging System for In-Situ Aircraft InspectionReport as inadecuate

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1 LANL-CBNU Engineering Institute Korea Jeonju-si 2 Department of Mechatronic Engineering Korea 3 CNU - Department of Aerospace Engineering

Abstract : Recently, laser ultrasonic propagation imaging UPI system has been greatly increased the attention of researchers for structural health management SHM application. The system has shown the promising results in the damage diagnosis of aircraft structures. However, the inspection was conducted in the experimental laboratory on a structure, which has been dissembled from an aircraft, which is not practical for the in-situ and large-scale aircraft structure inspection. This paper presents a wireless UPI system to realize the in-situ aircraft structure inspection. The system consists of a high-speed laser ultrasonic scanning system, a preamplifier-integrated piezoelectric PZT sensor network, an embedded wireless ultrasonic device WUD, and a ground SHM system. In this work, four 8-channel analog multiplexers were used to connect the sensor nodes, which were installed along the webs of an aircraft, to the WUD with an integrated four-channel 12-bit analog-to-digital converter ADC. The maximum sampling frequency of the ADC is 80 MHz. The WUD has an integrated Wi-Fi modem 802.11b-g-n. As further work, the UPI system will perform the inspection on a desired area with a selected local sensor node. Then, the acquired ultrasound will send to the ground SHM system to process for damage evaluation.

Keywords : Aircraft SHM applications Wireless and smart sensors Evaluation

Author: See Yenn Chong - Manish Man Shrestha - Jung-Ryul Lee -



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