PZT-Induced Lamb Waves and Pattern Recognition for On-Line Health Monitoring of Jointed Steel Plates

Roh, Yong Rae; Kim, Don Young; Yang, Sung-Byung; Park, Seunghee; Yun, Chung Bang

doi:10.4028/www.scientific.net/kem.321-323.146

Cited by 3 publications

(2 citation statements)

References 4 publications

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“…Up to date, many studies have been focused on SHM of structural connections by using global and local dynamic characteristics [2][3][4][5][6][7][8][9][10][11]. These studies have been mainly focused on developing SHM methods by using a single physical quantity such as strain, acceleration, or electromechanical impedance.…”

Section: Introductionmentioning

confidence: 99%

Temperature-Compensated Damage Monitoring by Using Wireless Acceleration-Impedance Sensor Nodes in Steel Girder Connection

Hong

Nguyen

Lee

et al. 2012

International Journal of Distributed Sensor Networks

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Temperature-compensated damage monitoring in steel girder connections by using wireless acceleration-impedance sensor nodes is experimentally examined. To achieve the objective, the following approaches are implemented. Firstly, wireless accelerationimpedance sensor nodes are described on the design of hardware components to operate. Secondly, temperature-compensated damage monitoring scheme for steel girder connections is designed by using the temperature compensation model and acceleration-impedance-based structural health monitoring methods. Finally, the feasibility of temperature-compensated damage monitoring scheme by using wireless acceleration-impedance sensor nodes is experimentally evaluated from damage monitoring in a lab-scaled steel girder with bolted connection joints.

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Section: Introductionmentioning

confidence: 99%

Temperature-Compensated Damage Monitoring by Using Wireless Acceleration-Impedance Sensor Nodes in Steel Girder Connection

Hong

Nguyen

Lee

et al. 2012

International Journal of Distributed Sensor Networks

View full text Add to dashboard Cite

show abstract

“…Up to date, many studies have been focused on SHM of structural connections by using global and local dynamic characteristics [1][2][3][4][5][6][7][8]. To implement SHM systems for structural connections, however, the costs associated with installation and maintenance of SHM systems can be very high.…”

Section: Introductionmentioning

confidence: 99%

Multi-scale hybrid sensor nodes for acceleration-impedance monitoring for steel structural connections

Park

Nguyen

et al. 2011

SPIE Proceedings

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This paper presents hybrid structural health monitoring of steel girder connections using wireless acceleration and impedance sensor nodes based on Imote2-platform. To achieve the research objective, the feasibility of the sensor nodes is examined about its performance for vibration-based global monitoring and impedance-based local monitoring in the structural systems as the following approaches. First, a damage monitoring scheme is described in parallel with global vibration-based methods and local impedance-based methods. Second, multi-scale sensor nodes that enable combined acceleration-impedance monitoring are described on the design of hardware components and embedded software to operate. Third, the performances of the multi-scale sensor nodes are experimentally evaluated from damage monitoring in a lab-scaled steel girder with bolted connection joints.

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Fatigue crack monitoring of aerospace structure based on lamb waves and binary tree support vector machines

Lu¹,

Zhou²

2017

J. vibroeng.

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To overcome the difficulty in identifying the fatigue crack in key parts of aerospace structure, a kind of methods aimed to monitor the crack length based on matching pursuit (MP) method and binary tree support vector machines (BT-SVM) classification algorithm was developed. In this method, Lamb wave signals were decomposed into a linear combination of several Chirplet atoms by MP method, and then the matching parameters were extracted as feature vectors for training and testing in BT-SVM classification algorithm. At the same time, a lug joint model was created with a certain ratio and the effect of crack extension on Lamb wave signals propagation was studied. At last, fatigue loading experiments were carried out in lug joints and tail reinforced frames of aircraft. The results showed that this method can monitor the length of fatigue crack effectively, which presents a new approach for monitoring the fatigue crack.

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PZT-Induced Lamb Waves and Pattern Recognition for On-Line Health Monitoring of Jointed Steel Plates

Cited by 3 publications

References 4 publications

Temperature-Compensated Damage Monitoring by Using Wireless Acceleration-Impedance Sensor Nodes in Steel Girder Connection

Temperature-Compensated Damage Monitoring by Using Wireless Acceleration-Impedance Sensor Nodes in Steel Girder Connection

Multi-scale hybrid sensor nodes for acceleration-impedance monitoring for steel structural connections

Fatigue crack monitoring of aerospace structure based on lamb waves and binary tree support vector machines

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