This article introduces the principles of an ultra low-cost scheme for in situ, embedded structural health monitoring. Based on the interactions of a Lamb wave with the structure, the proposed technique relies in comparing the time period where the sensed signature of the Lamb wave is greater than an user-defined threshold with a reference value. Compared to similar methods based on the monitoring of the structural state evolution, the proposed scheme is ultra low-cost, and therefore suitable for integrated systems that have a limited amount of available energy.
Grisso, B.L. ( 2007). Advancing Autonomous Structural Health Monitoring, PhD thesis, Virginia Polytechnic Institute.
2.
Montalvão, D., Maia, N.M.M. and Ribeiro , A.M.R. (2006). A review of vibration-based structural health monitoring with special emphasis on composite materials. Shock and Vibration Digest , 38(4), 130.
3.
Rakow, A. and Chang, F.-K. ( 2007). An in-situ sensor design for monitoring fatigue damage in bolted joints. In: Proceedings of the 6th International Workshop on Structural Health Monitoring (IWSHM), p. 109 Standford (CA).
4.
Giurguitiu, V. (2003). Embedded ultrasonic NDE with piezoelectric wafer sensors. RS-I2M Ultrasonic Methods , 12(3), 149-180.
5.
Boller, C. ( 2001). Ways and options for aircraft structural health management . Smart Materials and Structures, 10, 432-440.
6.
Ousset, Y. and Roudolff, F. ( 1997). Numerical analysis of delamination in multilayered composite plates. Computational Mechanics, 20, 122-126.
7.
Schiller, D. , Scherling, D. and Wehmann, G. ( 1999). Experience with conventional and new Ndi-inspections on fiber reinforced plastic (FRP) structures. In: 43rd Annual ATA NDT Forum, p. 32, Atlanta, Georgia, USA.
8.
Tillack, G.R. , Nockemann, C. and Bellon, C.X-ray modeling for industrial applications . NDT & E International, 33(7), 481-488, 200.
9.
Deschanel, S. , Vanel, L., Vigier , G., Godin, N. and Ciliberto, S. (2006). Statistical properties of microcracking in polyurethane foams under tensile test, influence of temperature and density. International Journal of Fracture, 140(1-4), 87-98.
10.
Carden, E.P. and Fanning, P. (2004). Vibration based condition monitoring: a review. Structural Health Monitoring , 5(1), 29-43.
11.
Popovics, J.S. and Rose, J.L. (1994). A survey of developments in ultrasonic NDE of concrete. IEEE Transactions on Ultrasonics , Ferroelectrics and Frequency Control, 41(1), 140-143.
12.
Farhey, D.N. (2004). Integrated virtual instrumentation and wireless monitoring for infrastructure diagnostics. Structural Health Monitoring, 3(4), 355-377.
13.
Inman, D.J. , Ahmadian, M. and Claus, R.O. (2001). Simultaneous active damping and health monitoring of aircraft panels. Journal of Intelligent Material Systems and Structures, 12, 775-783.
14.
Alleyne, D. and Cawley, P. (1992). Optimisation of lamb wave inspection techniques. NDTE International, 25, 11-22.
15.
Chimenti, D.E. and Martin, R.W. (1991). Nondestructive evaluation of composite laminates by leaky lamb waves. Ultrasonics , 29(1), 1321.
16.
Lu, Y., Ye, L. and Su, Z. ( 2004). Lamb wave-based crack identification for aluminum plate using active sensor network. In: Proceedings of the 2nd International Workshop on Structural Health Monitoring (IWSHM) , Standford (CA).
17.
Seale, M.D. , Smith, B.T. and Prosser, W.H. ( 1998). Lamb wave assessment of fatigue and thermal damage in composites. Journal of the Acoustical Society of America, 103(5), 2416-2424.
18.
Monnier, T. ( 2006). Lamb waves-based impact damage monitoring of a stiffened aircraft panel using piezoelectric transducers . Journal of Intelligent Material Systems and Structures, 17(5), 411-421.
19.
Monnier, T. , Guy, P., Lallart, M., Petit, L., Guyomar, D. and Richard, C. ( 2008). Optimization of signal preprocessing for the integration of cost-effective local intelligence in wireless self-powered Structural Health Monitoring. In: 3rd International Conference Smart Materials, Structures and Systems (CIMTEC) , Acireale, Sicily: Italy.
20.
Guyomar, D. , Jayet, Y., Petit , L., Lefeuvre, E., Monnier, T., Richard, C. and Lallart, M. (2007). Synchronized switch harvesting applied to self-powered smart systems: piezoactive microgenerators for autonomous wireless transmitters. Sensors and Actuators A: Physical, 138(1), 151-160.
21.
Lallart, M. , Guyomar, D., Jayet , Y., Petit, L., Lefeuvre, E., Monnier, T., Guy , P. and Richard, C. (2008). Synchronized switch harvesting applied to selfpowered smart systems: piezoactive microgenerators for autonomous wireless receiver. Sensors and Actuators A: Physical, 147(1), 263-272.
22.
Lynch, J.P. , Sundararajan, A., Law, K.H., Kiremidjian, A.S. and Carryer, E. ( 2003). Power-Efficient Data Management for a Wireless Structural Monitoring System. In: Proceedings of the 4th International Workshop on Structural Health Monitoring, pp. 15-17.
23.
Lynch, J.P. , Sundararajan, A., Law , K.H., Kiremidjian, A.S., Kenny, T. and Carryer, E. (2003). Embedment of structural monitoring algorithms in a wireless sensing unit. Structural Engineering and Mechanics, 15(3), 285-297.
24.
Whang, D.H., Xu, N., Rangwala, S., Chintalapudi, K., Govindan, R. and Wallace, J.W. ( 2004). Development of an embedded networked sensing system for structural health monitoring. In: Proceedings of the International Workshop on Smart Materials and Structures Technology , Waikiki: Hawaii.
25.
Loewke, K., Meyer, D., Starr, A. and Nemat-Nasser, S. ( 2005). Structural health monitoring using FFT. Smart Structures and Materials 2005: Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems, Proceedings of the SPIE, In: Tomizuka. and Masayoshi. (eds), Vol. 5765, pp. 931-935.
26.
Zhao, X., Qian, T., Mei, G., Kwan, C., Zane, R., Walsh, C., Paing, T. and Popovic, Z. ( 2007). Active health monitoring of an aircraft wing with an embedded piezoelectric sensor/actuator network: II. Wireless approaches . Smart Matererials and Structures, 16, 1218-1225.
27.
Zhao, X., Qian, T., Popovic, Z., Zane, R. and Mei, G. ( 2008). Wireless ultrasonic transducer network for structural health monitoring of an aircraft wing. In: Proceedings of 17th World Conference on Nondestructive Testing, pp. 25-28A, October, Shanghai: China.
28.
Kok-Leong, C. and Bah-Hwee, G. (2006). A low-energy low-voltage asynchronous 8051 microcontroller core. In: Circuits and Systems , 2006. ISCAS 2006. Proceedings 2006 IEEE International Symposium, pp. 21-24. May, Island of Kos.
29.
Frigo, M. and Johnson, S.G. ( 2005). The design and implementation of FFTw3. Proceedings of the IEEE, 93(2), 216-231.
30.
Scott, M.D. , Boser, B.E. and Pister, K.S.J. (2003). An ultralow-energy ADC for smart dust solid-state circuits. Journal of IEEE, 38(7), 1123-1129.
31.
Zhengming, F. and Culurciello , E. (2006). An ultra-low power silicon-on-sapphire ADC for energy-scavenging sensors. Circuits and Systems 2006. ISCAS 2006. Proceedings. 2006 IEEE International Symposium, 21-24 May, p. 4.
