Unmanned recognition of cracks on the pure titanium bleed air ducts in jet fighter using time various magnetic field analysis

Article type: Research Article

Authors: Wang, Dabin^a | Le, Minhhuy^b | Kim, Jungmin^b | Nam, Yun Gwan^a | Lee, Jinyi^{a; b;}

Affiliations: [a] Department of Control and Instrumentation Engineering, Graduate School of Chosun University, Gwangju, Korea | [b] Research Center for IT-based Real Time NDT, Chosun University, Gwangju, Korea

Correspondence: [*] Corresponding author: Jinyi Lee, Research Center for IT-based Real Time NDT, Chosun University, 309 Pilmun-Daero, Dong-gu, Gwangju, 61452, Korea. Tel.: +82 62 230 7101; E-mail: jinyilee@chosun.ac.kr

Abstract: Bleed air ducts are used in aircraft to de-ice fuselage and to heat the cockpit by transferring engine heat. These ducts are made of titanium tubes and are routed in the airframe. Over long-term operation, cracks may appear in the bleed air duct tubes because of the action of moisture and corrosive gas. Therefore, we proposed an electromagnetic testing system for the nondestructive testing of bleed air duct tubes. An unmanned crack detection algorithm, which based on analysis of electromagnetic field distribution, was developed. In addition, locations of cracks in the circumferential and axial directions of the bleed air duct tube were determined.

Keywords: Bleed air duct, bobbin-type integrated Hall sensor array, electromagnetic testing, crack detection

DOI: 10.3233/JAE-171233

Journal: International Journal of Applied Electromagnetics and Mechanics, vol. 59, no. 4, pp. 1297-1303, 2019