&lt;title&gt;Magnetoelastic permeability measurement for stress monitoring in steel tendons and cables&lt;/title&gt;

Wang, Ming L.; Chen, Zhen L.; Koontz, Steve S.; Lloyd, George M.

doi:10.1117/12.387842

Cited by 47 publications

(35 citation statements)

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“…By using this property, the stress of steel cable can be monitor by capturing variation of relative permeability. In case of using the E/M sensor, the relative permeability is measured by equation (2) [9].…”

Section: Theorical Backgroundsmentioning

confidence: 99%

Real-Time NDE of Steel Cable Using Elasto-Magnetic Sensors Installed in a Cable Climbing Robot

Park

Kim²,

Lee³

et al. 2011

28th International Symposium on Automation and Robotics in Construction (ISARC 2011)

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ABSTRACT:Recently, the steel cable used infrastructures are improved with progress in construction technology. In particular, the steel cable in long span bridges such as cable stayed bridges and suspension bridges are critical members which suspend dead load due to the main girders and bridge floor slabs. Damage at cable members can occur in the form of cross-sectional loss caused by corrosion and fracture, and it can lead structural failure due to concentrated stress of the cable.Therefore, nondestructive examination for steel cables is necessary so that the cross-sectional loss can be detected. This study proposes a steel cable health monitoring technique using an elasto-magnetic (E/M) sensor installed in a cable climbing robot. The E/M sensor is applied to detect the cross-sectional loss in this study while it was originally developed for measuring the tensile force in the previous works. To verify the feasibility of the proposed damage detection technique, steel bars which have 4-different diameters were fabricated and the output voltage value was measured at each diameter by the E/M sensor. Optimal input voltage and working point are chosen so that the linearity and resolution of results can ensure through repeated experiments, and then the E/M sensor scans the output voltage of the specimens based on the selected optimal condition. This E/M sensor based monitoring technique will be incorporated into the cable climbing robot in the further research. This proposed approach can be an effective automated tool for steel cable health monitoring.

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Section: Theorical Backgroundsmentioning

confidence: 99%

Real-Time NDE of Steel Cable Using Elasto-Magnetic Sensors Installed in a Cable Climbing Robot

Park

Kim²,

Lee³

et al. 2011

28th International Symposium on Automation and Robotics in Construction (ISARC 2011)

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“…Where H is magnetic field, supposed it is constant, the above formula turns to (3) Combine the (2), (3) and (I), we have (a) Equation (4) indicates that cable tension F is proportional to the change of permeability L.J-t, so L::.J-t is measured, the cable tension is educed.…”

Section: B Structure Designmentioning

confidence: 99%

“…Contrasted with the method of vibration frequency and strain gages, e.g. its frequency of dynami c response is high, it life-span is long and its capacity of protecting over loading is strong and measurement result is not influenced by wind, vibration and antisepsis layer of steel cable etc, it may dynamically measure cable tension on-line in all-weather, so it is most satisfactory method of health monitoring the cable tension of various important machine structures and architecture establishments [1][2] [3]. But there are two aspects Pr.e.8thIEEE III C.nl..n C.gnWlllnl.rmadCS (ICCI'09) G. Raelo.…”

Section: Introductionmentioning

confidence: 99%

Research of cable tension sensor with difference structure based on magnetoelastic effect

Tang

Shangzun

Yan

et al. 2009

2009 8th IEEE International Conference on Cognitive Informatics

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With a great deal of steel cables used in the various important machines and architecture establishments, health monitoring the cable tension becomes more and more important to ensure those equipments or establishments' safety in normal working. Contrasted with the method of vibration frequency and strain gages , the method of measurement steel cables tension based on magnetoelastic effect has a lot of merits, such as its frequency of dynamic response is high, its life-span is long and its capacity of protecting over-loading is strong etc., It meets the requirement of the health monitoring. But the structure of sensor is sleeve structure that measured steel cable serves as the core of primary and secondary solenoids. This structure makes fixing and maintenance difficult, and the change of temperature strongly influences measurement results, the purpose of compensating temperature error by using the temperature compensation curve is not satisfactory. In this article, the principle of cable tension sensor based on magnetoelastic effect is expounded; the theory of temperature influence is researched; the difference structure by single bypass excitation is designed; its magnetic loop is analyzed; the system of experiment is designed; and the experiments of pulling tension are carried on. The experiment results indicate that the structure of sensor is feasible, its errors of repetition are less than 0.15%, which meets the requirement of measurement.

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“…Ferromagnetic materials have magneto-strictive characteristics in the external magnetic field, magnetostrictive actuator is made based on the features and is widely used in the fields of precision positioning, precision machining and micro-electromechanical system [1]. Wang, ML, Sunaryo SUMITRO and Andrej JAROSEVIC etc.…”

Section: Introductionmentioning

confidence: 99%

Simulation analysis of influence factors in dynamic hysteresis model based on magneto-elastic effect

Tang

Mou

Zhou

et al. 2012

2012 IEEE 11th International Conference on Cognitive Informatics and Cognitive Computing

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Ferromagnetic materials have magneto-elastic effect when the materials was be magnetized. This characteristics using in cable tension measurement, which has a lot of merits contrasted with the method of vibration frequency and strain gages, its frequency of dynamic response is high, its life-span is long and its capacity of protecting over-loading is strong etc. so it is the most ideal methods. But the theory and model of magneto-elastic effect is not perfect, there are some problems to be researched and overcome. Such as dynamic hysteretic model, influence factors of magneto-elastic effect and so on. In this article, the dynamic hysteretic model is established based on energy conservation, analyze the main influence factors of model, which include bias magnetic field and excitation mode, excitation frequency, temperature influence. And simulate the results of that influence parameter, and it indicates that those influences are greatness, we must select rational excitation mode and frequency, and must overcome the temperature influence, the magneto-elastic effect will be widely using in cable tension measurement of bridge.

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<title>Magnetoelastic permeability measurement for stress monitoring in steel tendons and cables</title>

Cited by 47 publications

References 0 publications

Real-Time NDE of Steel Cable Using Elasto-Magnetic Sensors Installed in a Cable Climbing Robot

Real-Time NDE of Steel Cable Using Elasto-Magnetic Sensors Installed in a Cable Climbing Robot

Research of cable tension sensor with difference structure based on magnetoelastic effect

Simulation analysis of influence factors in dynamic hysteresis model based on magneto-elastic effect

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