The Experts below are selected from a list of 14022 Experts worldwide ranked by ideXlab platform
Ming L Wang - One of the best experts on this subject based on the ideXlab platform.
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calibration of elasto magnetic Sensors on in service cable stayed bridges for stress monitoring
Sensors, 2018Co-Authors: Carlo Cappello, Daniele Zonta, Hassan Ait Laasri, Branko Glisic, Ming L WangAbstract:The recent developments in measurement technology have led to the Installation of efficient monitoring systems on many bridges and other structures all over the world. Nowadays, more and more structures have been built and instrumented with Sensors. However, calibration and Installation of Sensors remain challenging tasks. In this paper, we use a case study, Adige Bridge, in order to present a low-cost method for the calibration and Installation of elasto-magnetic Sensors on cable-stayed bridges. Elasto-magnetic Sensors enable monitoring of cable stress. The Sensor Installation took place two years after the bridge construction. The calibration was conducted in two phases: one in the laboratory and the other one on site. In the laboratory, a Sensor was built around a segment of cable that was identical to those of the cable-stayed bridge. Then, the sample was subjected to a defined tension force. The Sensor response was compared with the applied load. Experimental results showed that the relationship between load and magnetic permeability does not depend on the Sensor fabrication process except for an offset. The determination of this offset required in situ calibration after Installation. In order to perform the in situ calibration without removing the cables from the bridge, vibration tests were carried out for the estimation of the cables’ tensions. At the end of the paper, we show and discuss one year of data from the elasto-magnetic Sensors. Calibration results demonstrate the simplicity of the Installation of these Sensors on existing bridges and new structures.
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calibration of elasto magnetic Sensors on in service cable stayed bridges for stress monitoring
Sensors, 2018Co-Authors: Carlo Cappello, Daniele Zonta, Hassan Ait Laasri, Branko Glisic, Ming L WangAbstract:The recent developments in measurement technology have led to the Installation of efficient monitoring systems on many bridges and other structures all over the world. Nowadays, more and more structures have been built and instrumented with Sensors. However, calibration and Installation of Sensors remain challenging tasks. In this paper, we use a case study, Adige Bridge, in order to present a low-cost method for the calibration and Installation of elasto-magnetic Sensors on cable-stayed bridges. Elasto-magnetic Sensors enable monitoring of cable stress. The Sensor Installation took place two years after the bridge construction. The calibration was conducted in two phases: one in the laboratory and the other one on site. In the laboratory, a Sensor was built around a segment of cable that was identical to those of the cable-stayed bridge. Then, the sample was subjected to a defined tension force. The Sensor response was compared with the applied load. Experimental results showed that the relationship between load and magnetic permeability does not depend on the Sensor fabrication process except for an offset. The determination of this offset required in situ calibration after Installation. In order to perform the in situ calibration without removing the cables from the bridge, vibration tests were carried out for the estimation of the cables’ tensions. At the end of the paper, we show and discuss one year of data from the elasto-magnetic Sensors. Calibration results demonstrate the simplicity of the Installation of these Sensors on existing bridges and new structures.
Carlo Cappello - One of the best experts on this subject based on the ideXlab platform.
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calibration of elasto magnetic Sensors on in service cable stayed bridges for stress monitoring
Sensors, 2018Co-Authors: Carlo Cappello, Daniele Zonta, Hassan Ait Laasri, Branko Glisic, Ming L WangAbstract:The recent developments in measurement technology have led to the Installation of efficient monitoring systems on many bridges and other structures all over the world. Nowadays, more and more structures have been built and instrumented with Sensors. However, calibration and Installation of Sensors remain challenging tasks. In this paper, we use a case study, Adige Bridge, in order to present a low-cost method for the calibration and Installation of elasto-magnetic Sensors on cable-stayed bridges. Elasto-magnetic Sensors enable monitoring of cable stress. The Sensor Installation took place two years after the bridge construction. The calibration was conducted in two phases: one in the laboratory and the other one on site. In the laboratory, a Sensor was built around a segment of cable that was identical to those of the cable-stayed bridge. Then, the sample was subjected to a defined tension force. The Sensor response was compared with the applied load. Experimental results showed that the relationship between load and magnetic permeability does not depend on the Sensor fabrication process except for an offset. The determination of this offset required in situ calibration after Installation. In order to perform the in situ calibration without removing the cables from the bridge, vibration tests were carried out for the estimation of the cables’ tensions. At the end of the paper, we show and discuss one year of data from the elasto-magnetic Sensors. Calibration results demonstrate the simplicity of the Installation of these Sensors on existing bridges and new structures.
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calibration of elasto magnetic Sensors on in service cable stayed bridges for stress monitoring
Sensors, 2018Co-Authors: Carlo Cappello, Daniele Zonta, Hassan Ait Laasri, Branko Glisic, Ming L WangAbstract:The recent developments in measurement technology have led to the Installation of efficient monitoring systems on many bridges and other structures all over the world. Nowadays, more and more structures have been built and instrumented with Sensors. However, calibration and Installation of Sensors remain challenging tasks. In this paper, we use a case study, Adige Bridge, in order to present a low-cost method for the calibration and Installation of elasto-magnetic Sensors on cable-stayed bridges. Elasto-magnetic Sensors enable monitoring of cable stress. The Sensor Installation took place two years after the bridge construction. The calibration was conducted in two phases: one in the laboratory and the other one on site. In the laboratory, a Sensor was built around a segment of cable that was identical to those of the cable-stayed bridge. Then, the sample was subjected to a defined tension force. The Sensor response was compared with the applied load. Experimental results showed that the relationship between load and magnetic permeability does not depend on the Sensor fabrication process except for an offset. The determination of this offset required in situ calibration after Installation. In order to perform the in situ calibration without removing the cables from the bridge, vibration tests were carried out for the estimation of the cables’ tensions. At the end of the paper, we show and discuss one year of data from the elasto-magnetic Sensors. Calibration results demonstrate the simplicity of the Installation of these Sensors on existing bridges and new structures.
Yuanzhen Ren - One of the best experts on this subject based on the ideXlab platform.
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observation duration analysis for earth surface features from a moon based platform
Advances in Space Research, 2018Co-Authors: Hanlin Ye, Huadong Guo, Guang Liu, Yuanzhen RenAbstract:Abstract Earth System Science is a discipline that performs holistic and comprehensive research on various components of the Earth. One of a key issue for the Earth monitoring and observation is to enhance the observation duration, the time intervals during which the Earth surface features can be observed by Sensors. In this work, we propose to utilise the Moon as an Earth observation platform. Thanks to the long distance between the Earth and the Moon, and the vast space on the lunar surface which is suitable for Sensor Installation, this Earth observation platform could have large spatial coverage, long temporal duration, and could perform multi-layer detection of the Earth. The line of sight between a proposed Moon-based platform and the Earth will change with different lunar surface positions; therefore, in this work, the position of the lunar surface was divided into four regions, including one full observation region and three incomplete observation regions. As existing methods are not able to perform global-scale observations, a Boolean matrix method was established to calculate the necessary observation durations from a Moon-based platform. Based on Jet Propulsion Laboratory (JPL) ephemerides and Earth Orientation Parameters (EOP), a formula was developed to describe the geometrical relationship between the Moon-based platform and Earth surface features in the unified spatial coordinate system and the unified time system. In addition, we compared the observation geometries at different positions on the lunar surface and two parameters that are vital to observation duration calculations were considered. Finally, an analysis method was developed. We found that the observation duration of a given Earth surface feature shows little difference regardless of Sensor position within the full observation region. However, the observation duration for Sensors in the incomplete observation regions is reduced by at least half. In summary, our results demonstrate the suitability of a Moon-based platform located in the full observation region.
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observation duration analysis for earth surface features from a moon based platform
Advances in Space Research, 2018Co-Authors: Hanlin Ye, Huadong Guo, Guang Liu, Yuanzhen RenAbstract:Abstract Earth System Science is a discipline that performs holistic and comprehensive research on various components of the Earth. One of a key issue for the Earth monitoring and observation is to enhance the observation duration, the time intervals during which the Earth surface features can be observed by Sensors. In this work, we propose to utilise the Moon as an Earth observation platform. Thanks to the long distance between the Earth and the Moon, and the vast space on the lunar surface which is suitable for Sensor Installation, this Earth observation platform could have large spatial coverage, long temporal duration, and could perform multi-layer detection of the Earth. The line of sight between a proposed Moon-based platform and the Earth will change with different lunar surface positions; therefore, in this work, the position of the lunar surface was divided into four regions, including one full observation region and three incomplete observation regions. As existing methods are not able to perform global-scale observations, a Boolean matrix method was established to calculate the necessary observation durations from a Moon-based platform. Based on Jet Propulsion Laboratory (JPL) ephemerides and Earth Orientation Parameters (EOP), a formula was developed to describe the geometrical relationship between the Moon-based platform and Earth surface features in the unified spatial coordinate system and the unified time system. In addition, we compared the observation geometries at different positions on the lunar surface and two parameters that are vital to observation duration calculations were considered. Finally, an analysis method was developed. We found that the observation duration of a given Earth surface feature shows little difference regardless of Sensor position within the full observation region. However, the observation duration for Sensors in the incomplete observation regions is reduced by at least half. In summary, our results demonstrate the suitability of a Moon-based platform located in the full observation region.
Hassan Ait Laasri - One of the best experts on this subject based on the ideXlab platform.
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calibration of elasto magnetic Sensors on in service cable stayed bridges for stress monitoring
Sensors, 2018Co-Authors: Carlo Cappello, Daniele Zonta, Hassan Ait Laasri, Branko Glisic, Ming L WangAbstract:The recent developments in measurement technology have led to the Installation of efficient monitoring systems on many bridges and other structures all over the world. Nowadays, more and more structures have been built and instrumented with Sensors. However, calibration and Installation of Sensors remain challenging tasks. In this paper, we use a case study, Adige Bridge, in order to present a low-cost method for the calibration and Installation of elasto-magnetic Sensors on cable-stayed bridges. Elasto-magnetic Sensors enable monitoring of cable stress. The Sensor Installation took place two years after the bridge construction. The calibration was conducted in two phases: one in the laboratory and the other one on site. In the laboratory, a Sensor was built around a segment of cable that was identical to those of the cable-stayed bridge. Then, the sample was subjected to a defined tension force. The Sensor response was compared with the applied load. Experimental results showed that the relationship between load and magnetic permeability does not depend on the Sensor fabrication process except for an offset. The determination of this offset required in situ calibration after Installation. In order to perform the in situ calibration without removing the cables from the bridge, vibration tests were carried out for the estimation of the cables’ tensions. At the end of the paper, we show and discuss one year of data from the elasto-magnetic Sensors. Calibration results demonstrate the simplicity of the Installation of these Sensors on existing bridges and new structures.
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calibration of elasto magnetic Sensors on in service cable stayed bridges for stress monitoring
Sensors, 2018Co-Authors: Carlo Cappello, Daniele Zonta, Hassan Ait Laasri, Branko Glisic, Ming L WangAbstract:The recent developments in measurement technology have led to the Installation of efficient monitoring systems on many bridges and other structures all over the world. Nowadays, more and more structures have been built and instrumented with Sensors. However, calibration and Installation of Sensors remain challenging tasks. In this paper, we use a case study, Adige Bridge, in order to present a low-cost method for the calibration and Installation of elasto-magnetic Sensors on cable-stayed bridges. Elasto-magnetic Sensors enable monitoring of cable stress. The Sensor Installation took place two years after the bridge construction. The calibration was conducted in two phases: one in the laboratory and the other one on site. In the laboratory, a Sensor was built around a segment of cable that was identical to those of the cable-stayed bridge. Then, the sample was subjected to a defined tension force. The Sensor response was compared with the applied load. Experimental results showed that the relationship between load and magnetic permeability does not depend on the Sensor fabrication process except for an offset. The determination of this offset required in situ calibration after Installation. In order to perform the in situ calibration without removing the cables from the bridge, vibration tests were carried out for the estimation of the cables’ tensions. At the end of the paper, we show and discuss one year of data from the elasto-magnetic Sensors. Calibration results demonstrate the simplicity of the Installation of these Sensors on existing bridges and new structures.
Branko Glisic - One of the best experts on this subject based on the ideXlab platform.
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calibration of elasto magnetic Sensors on in service cable stayed bridges for stress monitoring
Sensors, 2018Co-Authors: Carlo Cappello, Daniele Zonta, Hassan Ait Laasri, Branko Glisic, Ming L WangAbstract:The recent developments in measurement technology have led to the Installation of efficient monitoring systems on many bridges and other structures all over the world. Nowadays, more and more structures have been built and instrumented with Sensors. However, calibration and Installation of Sensors remain challenging tasks. In this paper, we use a case study, Adige Bridge, in order to present a low-cost method for the calibration and Installation of elasto-magnetic Sensors on cable-stayed bridges. Elasto-magnetic Sensors enable monitoring of cable stress. The Sensor Installation took place two years after the bridge construction. The calibration was conducted in two phases: one in the laboratory and the other one on site. In the laboratory, a Sensor was built around a segment of cable that was identical to those of the cable-stayed bridge. Then, the sample was subjected to a defined tension force. The Sensor response was compared with the applied load. Experimental results showed that the relationship between load and magnetic permeability does not depend on the Sensor fabrication process except for an offset. The determination of this offset required in situ calibration after Installation. In order to perform the in situ calibration without removing the cables from the bridge, vibration tests were carried out for the estimation of the cables’ tensions. At the end of the paper, we show and discuss one year of data from the elasto-magnetic Sensors. Calibration results demonstrate the simplicity of the Installation of these Sensors on existing bridges and new structures.
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calibration of elasto magnetic Sensors on in service cable stayed bridges for stress monitoring
Sensors, 2018Co-Authors: Carlo Cappello, Daniele Zonta, Hassan Ait Laasri, Branko Glisic, Ming L WangAbstract:The recent developments in measurement technology have led to the Installation of efficient monitoring systems on many bridges and other structures all over the world. Nowadays, more and more structures have been built and instrumented with Sensors. However, calibration and Installation of Sensors remain challenging tasks. In this paper, we use a case study, Adige Bridge, in order to present a low-cost method for the calibration and Installation of elasto-magnetic Sensors on cable-stayed bridges. Elasto-magnetic Sensors enable monitoring of cable stress. The Sensor Installation took place two years after the bridge construction. The calibration was conducted in two phases: one in the laboratory and the other one on site. In the laboratory, a Sensor was built around a segment of cable that was identical to those of the cable-stayed bridge. Then, the sample was subjected to a defined tension force. The Sensor response was compared with the applied load. Experimental results showed that the relationship between load and magnetic permeability does not depend on the Sensor fabrication process except for an offset. The determination of this offset required in situ calibration after Installation. In order to perform the in situ calibration without removing the cables from the bridge, vibration tests were carried out for the estimation of the cables’ tensions. At the end of the paper, we show and discuss one year of data from the elasto-magnetic Sensors. Calibration results demonstrate the simplicity of the Installation of these Sensors on existing bridges and new structures.
