scholarly journals Sub-Frequency Interval Approach in Electromechanical Impedance Technique for Concrete Structure Health Monitoring

Sensors ◽  
2010 ◽  
Vol 10 (12) ◽  
pp. 11644-11661 ◽  
Author(s):  
Yaowen Yang ◽  
Bahador Sabet Divsholi
Keyword(s):  
Health Monitoring ◽  
Concrete Structure ◽  
Frequency Interval ◽  
Structure Health Monitoring ◽  
Electromechanical Impedance ◽  
Interval Approach ◽  
Impedance Technique

Method for removing temperature effect in impedance-based structural health monitoring systems using polynomial regression

2020 ◽  
pp. 147592172091712 ◽  
Author(s):  
Bárbara M Gianesini ◽  
Nicolás E Cortez ◽  
Rothschild A Antunes ◽  
Jozue Vieira Filho
Keyword(s):  
Structural Health Monitoring ◽  
Damage Detection ◽  
Temperature Effect ◽  
Health Monitoring ◽  
Monitoring Systems ◽  
Electromechanical Impedance ◽  
Structural Health ◽  
Detection Systems ◽  
Impedance Technique ◽  
Health Monitoring Systems

Structural health monitoring systems are employed to evaluate the state of structures to detect damage, bringing economical and safety benefits. The electromechanical impedance technique is a promising damage detection tool since it evaluates structural integrity by only measuring the electrical impedance of piezoelectric transducers bonded to structures. However, in real-world applications, impedance-based damage detection systems exhibit strong temperature dependence; therefore, variations associated with temperature changes may be confused as damage. In this article, the temperature effect on the electrical impedance of piezoelectric ceramics attached to structures is analyzed. Besides, a new methodology to compensate for the temperature effect in the electromechanical impedance technique is proposed. The method is very general since it can be applied to nonlinear (polynomial) temperature and/or frequency dependences observed on the horizontal and vertical shifts of the impedance signatures. A computer algorithm that performs the compensation was developed, which can be easily incorporated into real-time damage detection systems. This compensation technique is applied successfully to two aluminum beams and one steel pipe, minimizing the effect of temperature variations on damage detection structural health monitoring systems in the temperature range from −40°C to 80°C and the frequency range from 10 to 90 kHz.

scholarly journals System-on-Chip Integration of a New Electromechanical Impedance Calculation Method for Aircraft Structure Health Monitoring

Sensors ◽  
2012 ◽  
Vol 12 (10) ◽  
pp. 13617-13635 ◽  
Author(s):  
Hamza Boukabache ◽  
Christophe Escriba ◽  
Sabeha Zedek ◽  
Daniel Medale ◽  
Sebastien Rolet ◽  
...  
Keyword(s):  
Health Monitoring ◽  
Calculation Method ◽  
System On Chip ◽  
Structure Health Monitoring ◽  
Aircraft Structure ◽  
Electromechanical Impedance ◽  
On Chip ◽  
Impedance Calculation

Development of a capacitive sensor for concrete structure health monitoring

2017 ◽  
Vol 149 ◽  
pp. 659-668 ◽  
Author(s):  
Yu Cheng ◽  
Feng Gao ◽  
Asad Hanif ◽  
Zeyu Lu ◽  
Zongjin Li
Keyword(s):  
Health Monitoring ◽  
Concrete Structure ◽  
Capacitive Sensor ◽  
Structure Health Monitoring

Research on Miniaturized and Portable Impedance-Measuring Device for Structural Health Monitoring

2011 ◽  
Vol 230-232 ◽  
pp. 587-591
Author(s):  
Yu Xiang Zhang ◽  
Dong Dong Wen ◽  
Hua Cheng Li ◽  
Fu Hou Xu
Keyword(s):  
Structural Health Monitoring ◽  
Health Monitoring ◽  
Structural Damage ◽  
Electric Impedance ◽  
Measuring Device ◽  
Line System ◽  
Electromechanical Impedance ◽  
Structural Health ◽  
Impedance Technique ◽  
On Line

Electromechanical impedance technique which based on smart material is a new method for structural damage detection, and it could be widely applied in structural health monitoring field. However, a very expensive and bulky analyzer is being used to measure the impedance, which is not practical for on-line system. Therefore, this paper developed a device that can measure the electric impedance using small modular electric components and reasonable circuit. Experiments are carried out to test the aluminum beam crack. Results indicate that the device can measure the electric impedance and detect the damage effectively. The proposed method provides a solution to miniaturize the impedance-measuring equipment and reduce the cost of measurement.

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