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RISS 인기검색어
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- 주제어 : Piezoelectric Impedance Response (검색결과 5 건)
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Square-Structure Estimation of Bolt Fastening and Crack Condition Using PZT Patches
Dong-pyo Hong,Yong Hong,Jea-jung Lee,Byeong-hee Han,Young-moon Kim 대한기계학회 2006 대한기계학회 춘추학술대회 Vol.2006 No.9
This paper describes a primary study for a new method of enhancing measurement, using impedance analysis method, applied to structure health monitoring. Skyscrapers, bridges, tunnels, towers, etc. that were built several decades ago, and have already approached their operational life span due to aging, cracks, material deterioration, and so on. Thereby, the structural health monitoring technique has been obtained considerable attention. The goal of this research is to show basic information to evaluate structural health condition using piezoelectric sensors. The piezoelectric materials have various merits. It is easy to shape various forms and can be embedded on the materials more conveniently. Moreover, the excitation frequency can be changed and the piezoelectric sensors cost less. All these features make the piezoelectric-based system applicable to structural healthy monitoring. This work presents a study for the development of a practical and quantitative technique for assessment of the structural health condition by piezoelectric impedance-based technique associated with longitudinal wave propagation. The natural frequency has a tendency of frequency shifting with respect to the hole size corresponding to real structure crack size. To estimate the damage condition numerically, we suggest the evaluation method Cov (Covariance) and CC (Correlation Coefficient) in this paper.
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홍동표,홍용,왕고평,김병진,김영문,이재정,김재열 한국공작기계학회 2006 한국공작기계학회 추계학술대회논문집 Vol.2006 No.-
This paper presents a primary study for a new method of enhancing measurement using impedance analysis method, which is widely used for structure health monitoring. Many of skyscrapers, bridges, tunnels, which have been built up several years, and nearly reached their operating life due to aging crack, material deterioration, and so on. therefore, the health monitoring technique has obtained considerable attention. The goal of this research is to show basic information to evaluate structural health condition using piezoelectric sensors. The piezoelectric materials have various merits. It is easy to shape various forms and can be embedded on the materials more conveniently. Moreover, the excitation frequency can be changed and the piezoelectric sensors cost less. All these features make the piezoelectric-based system applicable to structural healthy monitoring. This work presents a study for the development of a practical and quantitative technique for assessment of the structural health condition by piezoelectric impedance-based technique associated with longitudinal wave propagation. To estimate the damage condition numerically, we suggest the evaluation method Cov (Covariance) and CC (Correlation Coefficient) in this paper.
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홍동표(Dong-Pyo Hong),홍용(Yong Hong),왕고평(Gao-Ping Wang),김병진(Byung-Jin Kim),김영문(Young-moon Kim),이재정(Jae-Jung Lee),김재열(Jae-Yeol Kim) 한국생산제조학회 2006 한국공작기계학회 춘계학술대회논문집 Vol.2006 No.-
This paper presents a primary study for a new method of enhancing measurement using impedance analysis method, which is widely used for structure health monitoring. Many of skyscrapers, bridges, tunnels, which have been built up several years, and nearly reached their operating life due to aging crack, material deterioration, and so on. therefore, the health monitoring technique has obtained considerable attention. The goal of this research is to show basic information to evaluate structural health condition using piezoelectric sensors. The piezoelectric materials have various merits. It is easy to shape various forms and can be embedded on the materials more conveniently. Moreover, the excitation frequency can be changed and the piezoelectric sensors cost less. All these features make the piezoelectric-based system applicable to structural healthy monitoring. This work presents a study for the development of a practical and quantitative technique for assessment of the structural health condition by piezoelectric impedance-based technique associated with longitudinal wave propagation. To estimate the damage condition numerically, we suggest the evaluation method Cov (Covariance) and CC (Correlation Coefficient) in this paper.
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홍동표(Dong-Pyo Hong),홍용(Yong Hong),왕고평(Gao-Ping Wang),김병진(Byung-Jin Kim),김영문(Young-moon Kim),이재정(Jae-Jung Lee),김재열(Jae-Yeol Kim) 한국생산제조학회 2006 한국생산제조시스템학회 학술발표대회 논문집 Vol.2006 No.5
This paper presents a primary study for a new method of enhancing measurement using impedance analysis method, which is widely used for structure health monitoring. Many of skyscrapers, bridges, tunnels, which have been built up several years, and nearly reached their operating life due to aging crack, material deterioration, and so on. therefore, the health monitoring technique has obtained considerable attention. The goal of this research is to show basic information to evaluate structural health condition using piezoelectric sensors. The piezoelectric materials have various merits. It is easy to shape various forms and can be embedded on the materials more conveniently. Moreover, the excitation frequency can be changed and the piezoelectric sensors cost less. All these features make the piezoelectric-based system applicable to structural healthy monitoring. This work presents a study for the development of a practical and quantitative technique for assessment of the structural health condition by piezoelectric impedance-based technique associated with longitudinal wave propagation. To estimate the damage condition numerically, we suggest the evaluation method Cov (Covariance) and CC (Correlation Coefficient) in this paper.
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A Study on Quantitative Estimation of Fastening Condition of Bolt Using Piezoelectric Sensors
Dong-pyo Hong,Yong Hong,Byung-jin Kim,Young-moon Kim 대한기계학회 2006 대한기계학회 춘추학술대회 Vol.2006 No.9
This paper presents a study on the development of a practical and quantitative technique for assessment of the structural health condition by piezoelectric sensors. The electro-impedance-based technique with PZT is very sensitive for evaluation of the incipient and small damage in high frequency range, however, the commonly traditional modal analysis method is effective only for considerably larger damages in low frequency. The paper presents the performance of the electro-impedance-based technique in detecting real-time damage on the specimen that is an aluminum plate fastened with bolts and nuts by different torques. The specimen is simulated with small damage of bolt loosening and the damage is detected and characterized by the bonded PZT sensors. A large amount of experiments are executed. Several conditions are imposed to simulate real-time damage, i.e. the location of loosening bolts and the loosening extent of bolts. The different indices are discussed and executed to efficiently quantify the damage conditions. As for the location of bolt loosening, the RMSD is found to be the most appropriate one. The possibility of repeatability of the pristine condition signatures of different sensors is also explored. The theory behind this technique and experimental investigations are presented in this paper. The analytical results strongly show the sensibility and reliability of this technique.
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