全部 标题 作者
关键词 摘要

OALib Journal期刊
ISSN: 2333-9721
费用:99美元

查看量下载量

相关文章

更多...

An Investigation of Structural Damage Location Based on Ultrasonic Excitation-Fiber Bragg Grating Detection

DOI: 10.1155/2013/525603

Full-Text   Cite this paper   Add to My Lib

Abstract:

With the continuous development of mechanical automation, the structural health monitoring techniques are increasingly high requirements for damage detection. So structural health monitoring (SHM) has been playing a significant role in terms of damage prognostics. The main contribution pursued in this investigation is to establish a detection system based on ultrasonic excitation and fiber Bragg grating sensing, which combines the advantages of the ultrasonic detection and fiber Bragg grating (FBG). Differencing from most common approaches, a new way of damage detection is based on fiber Bragg grating (FBG), which can easily realize distributed detection. The basic characteristics of fiber Bragg grating sensing system are analyzed, and the positioning algorithm of structural damage is derived in theory. On these bases, the detection system was used to analyze damage localization in the aluminum alloy plate of a hole with diameters of 6?mm. Experiments have been carried out to demonstrate that the sensing system was feasible and that the estimation method of the location algorithm was easy to implement. 1. Introduction Recently, structural health monitoring (SHM) has been playing a significant complimentary role in terms of damage prognostics, which has been applied in many fields, especially in aerospace, civil engineering, railway field extensions, and even in the automobile industry. Traditional nondestructive evaluation (NDE) techniques include ultrasonic, eddy current, and magnetic particle. In recent years, SHM using ultrasonic excitation and piezoelectric ceramics network has been extensively studied, while ultrasonic excitation and fiber Bragg grating sensing technology is a new damage detection method [1]. It fully combines ultrasonic advantages, such as focused power, strong sound press, and long propagation length and the characteristic that FBG can easily construct distributed detection network, overcoming the disadvantages of traditional electronic sensors. At present, it has already been detected by related researchers. Such as, Tsuda presented a novel ultrasound sensing system using a fiber Bragg grating (FBG) and broadband light source to damage inspection [2] and measured imparting damage to carbon fiber composite using FBG [3]. Brian Culshaw summarized the interaction mechanisms between ultrasound and fiber sensors and confirms their functional flexibility to detect damage in a sample [4]. Tsuda et al. analyzed ultrasonic sensitivity through an aluminum plate and also evaluated from the response the amplitude of the FBG sensor [5]. Jang

References

[1]  S. Muthumari and A. Singh, “Review of various ultrasonic techniques employed in modern industries,” International Journal of Engineering Science and Technology, vol. 3, no. 4, pp. 3078–3085, 2011.
[2]  H. Tsuda, “A Bragg wavelength-insensitive fiber Bragg grating ultrasound sensing system that uses a broadband light and no optical filter,” Sensors, vol. 11, no. 7, pp. 6954–6966, 2011.
[3]  H. Tsuda, N. Toyama, K. Urabe, and J. Takatsubo, “Impact damage detection in CFRP using fiber Bragg gratings,” Smart Materials and Structures, vol. 13, no. 4, pp. 719–724, 2004.
[4]  B. Culshaw, G. Thursby, D. Betz, and B. Sorazu, “The detection of ultrasound using fiber-optic sensors,” IEEE Sensors Journal, vol. 8, no. 7, pp. 1360–1367, 2008.
[5]  H. Tsuda, K. Kumakura, and S. Ogihara, “Ultrasonic sensitivity of strain-insensitive fiber Bragg grating sensors and evaluation of ultrasound-induced strain,” Sensors, vol. 10, no. 12, pp. 11248–11258, 2010.
[6]  B.-W. Jang, S.-O. Park, Y.-G. Lee, C.-G. Kim, and C.-Y. Park, “Detection of impact damage in composite structures using high speed FBG interrogator,” Advanced Composite Materials, vol. 21, no. 1, pp. 29–44, 2012.
[7]  B.-W. Jang, Y.-G. Lee, J.-H. Kim, Y.-Y. Kim, and C.-G. Kim, “Real-time impact identification algorithm for composite structures using fiber Bragg grating sensors,” Structural Control and Health Monitoring, vol. 19, no. 7, pp. 580–591, 2012.

Full-Text

Contact Us

service@oalib.com

QQ:3279437679

WhatsApp +8615387084133