Pub Date : 2009-12-01DOI: 10.1109/EESMS.2009.5341311
M. L. Casalicchio, A. Penna, G. Perrone, A. Vallan
This paper describes a fiber displacement sensor and analyzes its performance in evaluating the evolution of cracks for structural health monitoring applications, both over short and long time periods. The sensor is based on plastic optical fibers, a choice that allows having all the advantages typical of optical fibers, but with costs comparable to the more common electro-mechanical systems. Two sensor topologies have been realized and some experimental results about laboratory and in field tests are reported to assess the effectiveness of the proposed solution.
{"title":"Optical fiber sensors for long- and short-term crack monitoring","authors":"M. L. Casalicchio, A. Penna, G. Perrone, A. Vallan","doi":"10.1109/EESMS.2009.5341311","DOIUrl":"https://doi.org/10.1109/EESMS.2009.5341311","url":null,"abstract":"This paper describes a fiber displacement sensor and analyzes its performance in evaluating the evolution of cracks for structural health monitoring applications, both over short and long time periods. The sensor is based on plastic optical fibers, a choice that allows having all the advantages typical of optical fibers, but with costs comparable to the more common electro-mechanical systems. Two sensor topologies have been realized and some experimental results about laboratory and in field tests are reported to assess the effectiveness of the proposed solution.","PeriodicalId":320320,"journal":{"name":"2009 IEEE Workshop on Environmental, Energy, and Structural Monitoring Systems","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125164098","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2009-12-01DOI: 10.1109/EESMS.2009.5341315
V. Di Lecce, M. Calabrese
An Ontology-based approach to environmental signature detection with particular reference to navigating vessels is presented. The final attempt will be to check if environmental markers taken from MODIS sensors (hence at moderate spatial resolutions, from 250m up to 1 km) can be reversely associated with the event of a vessel transit or presence. To fulfill this requirement, although at an early stage, a top-down approach is proposed. From the detection system designer's point of view the first activity is the definition of the problem ontology. Following there is the phase where string patterns recognized by the ontology are searched through the available dataset. The employed search patterns are suggested from the tracks provided by AIS data source. Preliminary experiments seem to endorse the proposed approach.
{"title":"An Ontology-based approach to environmental signature detection: the vessel tracking case study","authors":"V. Di Lecce, M. Calabrese","doi":"10.1109/EESMS.2009.5341315","DOIUrl":"https://doi.org/10.1109/EESMS.2009.5341315","url":null,"abstract":"An Ontology-based approach to environmental signature detection with particular reference to navigating vessels is presented. The final attempt will be to check if environmental markers taken from MODIS sensors (hence at moderate spatial resolutions, from 250m up to 1 km) can be reversely associated with the event of a vessel transit or presence. To fulfill this requirement, although at an early stage, a top-down approach is proposed. From the detection system designer's point of view the first activity is the definition of the problem ontology. Following there is the phase where string patterns recognized by the ontology are searched through the available dataset. The employed search patterns are suggested from the tracks provided by AIS data source. Preliminary experiments seem to endorse the proposed approach.","PeriodicalId":320320,"journal":{"name":"2009 IEEE Workshop on Environmental, Energy, and Structural Monitoring Systems","volume":"58 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128373692","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2009-12-01DOI: 10.1109/EESMS.2009.5341325
M. Corrà, L. Zuech, C. Torghele, P. Pivato, D. Macii, D. Petri
Flexible, distributed monitoring systems are essential to support decisions in a variety of contexts such as, for instance, vehicular traffic control, emergency evacuation plans, energy optimization services, pollutant detection or intelligent agriculture applications. In this paper, we present WSNAP, a platform for Wireless Sensor Network (WSN) deployment. WSNAP relies on standard technologies, which enable users to interact easily with different types of sensors. Its main advantage is the ability to be easily adapted to the requirements of different applications, regardless of network topology and sensor board architecture. WSNAP was tested on a small WSN deployed at the “Dipartimento di Ingegneria e Scienza dell'Informazione” (DISI) of the University of Trento, Trento, Italy. In the following, after describing the structure and the main features of the platform, the results of some experiments are reported.
{"title":"WSNAP: a Flexible Platform for Wireless Sensor Networks data collection and management","authors":"M. Corrà, L. Zuech, C. Torghele, P. Pivato, D. Macii, D. Petri","doi":"10.1109/EESMS.2009.5341325","DOIUrl":"https://doi.org/10.1109/EESMS.2009.5341325","url":null,"abstract":"Flexible, distributed monitoring systems are essential to support decisions in a variety of contexts such as, for instance, vehicular traffic control, emergency evacuation plans, energy optimization services, pollutant detection or intelligent agriculture applications. In this paper, we present WSNAP, a platform for Wireless Sensor Network (WSN) deployment. WSNAP relies on standard technologies, which enable users to interact easily with different types of sensors. Its main advantage is the ability to be easily adapted to the requirements of different applications, regardless of network topology and sensor board architecture. WSNAP was tested on a small WSN deployed at the “Dipartimento di Ingegneria e Scienza dell'Informazione” (DISI) of the University of Trento, Trento, Italy. In the following, after describing the structure and the main features of the platform, the results of some experiments are reported.","PeriodicalId":320320,"journal":{"name":"2009 IEEE Workshop on Environmental, Energy, and Structural Monitoring Systems","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129831587","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2009-12-01DOI: 10.1109/EESMS.2009.5341309
G. Busca, A. Cigada, A. Manenti, E. Zappa
Monitoring of structures requires vibration measurements to both estimate structural parameters and early predict potential disasters. The problem is crucial in particular in slender structures, where the use of classic techniques (such as accelerometer-based measurements and the strain estimation using either electric or optical-fibre strain gauges) presents some limitations. In these latter cases contactless measuring techniques would be preferred in order to avoid loading effects and, above all, to measure the vibration in many points contemporarily with a single transducer (a camera). An image-based vibration measurement technique is proposed and qualified in this paper and an application to overhead transmission lines (OHTL) is shown as an example.
{"title":"Vision-based measurements for slender structures vibration monitoring","authors":"G. Busca, A. Cigada, A. Manenti, E. Zappa","doi":"10.1109/EESMS.2009.5341309","DOIUrl":"https://doi.org/10.1109/EESMS.2009.5341309","url":null,"abstract":"Monitoring of structures requires vibration measurements to both estimate structural parameters and early predict potential disasters. The problem is crucial in particular in slender structures, where the use of classic techniques (such as accelerometer-based measurements and the strain estimation using either electric or optical-fibre strain gauges) presents some limitations. In these latter cases contactless measuring techniques would be preferred in order to avoid loading effects and, above all, to measure the vibration in many points contemporarily with a single transducer (a camera). An image-based vibration measurement technique is proposed and qualified in this paper and an application to overhead transmission lines (OHTL) is shown as an example.","PeriodicalId":320320,"journal":{"name":"2009 IEEE Workshop on Environmental, Energy, and Structural Monitoring Systems","volume":"50 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131825805","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2009-12-01DOI: 10.1109/EESMS.2009.5341323
E. Nunzi, G. Saltanocchi
Environmental monitoring systems makes large use of satellite-based systems for the daily earth surface scanning. The accuracy of the final-user application that employs data acquired by using the satellite-based instrument strictly depends on the stability of the on-board atomic clock. It follows that a real-time monitoring of the frequency stability of the atomic clock is crucial for guaranteeing the reliability of the whole system.
{"title":"A simplified detector for atomic clock anomalies detection","authors":"E. Nunzi, G. Saltanocchi","doi":"10.1109/EESMS.2009.5341323","DOIUrl":"https://doi.org/10.1109/EESMS.2009.5341323","url":null,"abstract":"Environmental monitoring systems makes large use of satellite-based systems for the daily earth surface scanning. The accuracy of the final-user application that employs data acquired by using the satellite-based instrument strictly depends on the stability of the on-board atomic clock. It follows that a real-time monitoring of the frequency stability of the atomic clock is crucial for guaranteeing the reliability of the whole system.","PeriodicalId":320320,"journal":{"name":"2009 IEEE Workshop on Environmental, Energy, and Structural Monitoring Systems","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133232681","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2009-12-01DOI: 10.1109/EESMS.2009.5341306
M. Vanali, A. Cigada
In the last years an increasing interest has been devoted to all the topics related to security and safety of people. Particular attention has been paid to health monitoring of large civil structures hosting lot of people, like high-rise buildings and stadia. The vast scientific literature confirms the possibility to relate structural health to the evolution of modal parameters, often reaching the aim of localizing any eventual damage, a task otherwise impossible with different techniques. This paper shows a part of the long lasting project involving Politecnico di Milano in the setting up of a permanent health monitoring system at the G. Meazza stadium in Milan. As damage identification is related to changes of the modal parameters, the evaluation of their normal spread is fundamental to fix a threshold in order to identify possible worrying situations. This paper deals with the identification of the spread in the modal parameter estimation of one of the grandstands of the so-called 3° ring of the G. Meazza stadium in Milan, setting up an automated Operational Modal Analysis algorithm and analyzing a first set of data. Some ideas are gathered in order to identify the minimum number of identifications needed to have a robust estimation of the modal parameters.
{"title":"Long term operational modal analysis of a stadium grandstand to structural health monitoring purposes","authors":"M. Vanali, A. Cigada","doi":"10.1109/EESMS.2009.5341306","DOIUrl":"https://doi.org/10.1109/EESMS.2009.5341306","url":null,"abstract":"In the last years an increasing interest has been devoted to all the topics related to security and safety of people. Particular attention has been paid to health monitoring of large civil structures hosting lot of people, like high-rise buildings and stadia. The vast scientific literature confirms the possibility to relate structural health to the evolution of modal parameters, often reaching the aim of localizing any eventual damage, a task otherwise impossible with different techniques. This paper shows a part of the long lasting project involving Politecnico di Milano in the setting up of a permanent health monitoring system at the G. Meazza stadium in Milan. As damage identification is related to changes of the modal parameters, the evaluation of their normal spread is fundamental to fix a threshold in order to identify possible worrying situations. This paper deals with the identification of the spread in the modal parameter estimation of one of the grandstands of the so-called 3° ring of the G. Meazza stadium in Milan, setting up an automated Operational Modal Analysis algorithm and analyzing a first set of data. Some ideas are gathered in order to identify the minimum number of identifications needed to have a robust estimation of the modal parameters.","PeriodicalId":320320,"journal":{"name":"2009 IEEE Workshop on Environmental, Energy, and Structural Monitoring Systems","volume":"108 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128613916","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2009-12-01DOI: 10.1109/EESMS.2009.5341310
D. Tosi, M. Olivero, G. Perrone, A. Vallan, Luciano Arcudi
This paper reviews a couple of simple and low-cost techniques suitable to interrogate the fiber Bragg grating sensors used in structural health monitoring and provides few examples on their applications. Both these techniques evaluate mechanical strains through the measurement of optical power variations, thus avoiding expensive spectral analyses. With the first technique, which uses a broadband source and a pair of matched gratings, it is possible to fabricate a low-cost optical sensor with intrinsic compensation for temperature effects. The other technique, which is based on a laser source wavelength-matched with the Bragg grating, allows evaluating dynamic strains down to few nanostrain. These two complementary approaches are analyzed and compared, highlighting their strengths and weakness from the point of view of structural health monitoring applications. Then, since interrogation methods that exploit the variation of the received signal amplitude are very sensitive to noise, a description of how performances can be improved using standard signal-processing algorithms is also given. The combination of one of the proposed approaches with the suitable signal-processing techniques allows achieving results comparable with other common grating interrogation methods, but at a fraction of their costs.
{"title":"Simple fiber Bragg grating sensing systems for structural health monitoring","authors":"D. Tosi, M. Olivero, G. Perrone, A. Vallan, Luciano Arcudi","doi":"10.1109/EESMS.2009.5341310","DOIUrl":"https://doi.org/10.1109/EESMS.2009.5341310","url":null,"abstract":"This paper reviews a couple of simple and low-cost techniques suitable to interrogate the fiber Bragg grating sensors used in structural health monitoring and provides few examples on their applications. Both these techniques evaluate mechanical strains through the measurement of optical power variations, thus avoiding expensive spectral analyses. With the first technique, which uses a broadband source and a pair of matched gratings, it is possible to fabricate a low-cost optical sensor with intrinsic compensation for temperature effects. The other technique, which is based on a laser source wavelength-matched with the Bragg grating, allows evaluating dynamic strains down to few nanostrain. These two complementary approaches are analyzed and compared, highlighting their strengths and weakness from the point of view of structural health monitoring applications. Then, since interrogation methods that exploit the variation of the received signal amplitude are very sensitive to noise, a description of how performances can be improved using standard signal-processing algorithms is also given. The combination of one of the proposed approaches with the suitable signal-processing techniques allows achieving results comparable with other common grating interrogation methods, but at a fraction of their costs.","PeriodicalId":320320,"journal":{"name":"2009 IEEE Workshop on Environmental, Energy, and Structural Monitoring Systems","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124647366","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2009-12-01DOI: 10.1109/EESMS.2009.5341321
V. Di Lecce, A. Amato, C. Martines, Politecnico di Bari, R. Dario
Aim of this paper is to present an intelligent distributed monitoring system designed to monitor the air quality in specific indoor environments. The proposed architecture is very flexible and the used design principles can be applied to various indoor and outdoor environments. In this work the authors describe the features of this system tuned for monitoring the air quality in a healthcare center.
{"title":"Air quality control for health care centres. The application of an intelligent distributed system","authors":"V. Di Lecce, A. Amato, C. Martines, Politecnico di Bari, R. Dario","doi":"10.1109/EESMS.2009.5341321","DOIUrl":"https://doi.org/10.1109/EESMS.2009.5341321","url":null,"abstract":"Aim of this paper is to present an intelligent distributed monitoring system designed to monitor the air quality in specific indoor environments. The proposed architecture is very flexible and the used design principles can be applied to various indoor and outdoor environments. In this work the authors describe the features of this system tuned for monitoring the air quality in a healthcare center.","PeriodicalId":320320,"journal":{"name":"2009 IEEE Workshop on Environmental, Energy, and Structural Monitoring Systems","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123917437","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2009-12-01DOI: 10.1109/EESMS.2009.5341318
G. Latini, G. Passerini, F. Principi
Ancona Province includes an area that has been claimed “Highly at risk of environmental crisis” due to the presence of a multitude of anthropogenic pollution sources. Most of these sources emit an amount of airborne pollutants. In 2006, Local Authorities started to monitor vascular diseases within the risky area trying to assess their correlation with long-term exposure to Particulate Matter. Researchers found that monitored data were available only from 2001 and that several data sets were corrupted. They asked us how to deal with this lack of data and we suggested performing a complete dispersion analysis over the entire area and upon ten years of time spam, by applying a well-known state-of-the-art regulatory model such as AERMOD. Here we present the preliminary results of our study.
{"title":"Evaluation of long-term exposure to pollutants by means of a dispersion model","authors":"G. Latini, G. Passerini, F. Principi","doi":"10.1109/EESMS.2009.5341318","DOIUrl":"https://doi.org/10.1109/EESMS.2009.5341318","url":null,"abstract":"Ancona Province includes an area that has been claimed “Highly at risk of environmental crisis” due to the presence of a multitude of anthropogenic pollution sources. Most of these sources emit an amount of airborne pollutants. In 2006, Local Authorities started to monitor vascular diseases within the risky area trying to assess their correlation with long-term exposure to Particulate Matter. Researchers found that monitored data were available only from 2001 and that several data sets were corrupted. They asked us how to deal with this lack of data and we suggested performing a complete dispersion analysis over the entire area and upon ten years of time spam, by applying a well-known state-of-the-art regulatory model such as AERMOD. Here we present the preliminary results of our study.","PeriodicalId":320320,"journal":{"name":"2009 IEEE Workshop on Environmental, Energy, and Structural Monitoring Systems","volume":"538 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116709770","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2009-12-01DOI: 10.1109/EESMS.2009.5341322
G. Latini, G. Passerini
Ozone is a secondary pollutant that forms in the atmosphere through complex chemical reactions mainly between Nitrogen Oxides and Volatile Organic Compounds. Such reactions are triggered by the presence of solar radiation. On August 2000 several Ozone episodes occurred in Falconara Marittima, a municipality of Ancona Province that hosts an oil refinery. Data acquired at monitoring stations showed high levels of Ozone and very high levels of Hydrocarbons. Two years later, we were asked to study the episodes. Some specialists had argued that monitored data, although validated and accepted by authorities, seemed affected by errors. Being impossible to exclude a fault, we thought to reduce the range of plausible malfunctions. In fact, environmental data sets, acquired at monitoring stations, may be analyzed in the frequency domain to reveal periodic components that do not emerge after a preliminary study of time series. This procedure may help data validation procedures, especially when data sets are supposed prone to errors.
{"title":"Quality assessment of monitored environmental data in the frequency domain","authors":"G. Latini, G. Passerini","doi":"10.1109/EESMS.2009.5341322","DOIUrl":"https://doi.org/10.1109/EESMS.2009.5341322","url":null,"abstract":"Ozone is a secondary pollutant that forms in the atmosphere through complex chemical reactions mainly between Nitrogen Oxides and Volatile Organic Compounds. Such reactions are triggered by the presence of solar radiation. On August 2000 several Ozone episodes occurred in Falconara Marittima, a municipality of Ancona Province that hosts an oil refinery. Data acquired at monitoring stations showed high levels of Ozone and very high levels of Hydrocarbons. Two years later, we were asked to study the episodes. Some specialists had argued that monitored data, although validated and accepted by authorities, seemed affected by errors. Being impossible to exclude a fault, we thought to reduce the range of plausible malfunctions. In fact, environmental data sets, acquired at monitoring stations, may be analyzed in the frequency domain to reveal periodic components that do not emerge after a preliminary study of time series. This procedure may help data validation procedures, especially when data sets are supposed prone to errors.","PeriodicalId":320320,"journal":{"name":"2009 IEEE Workshop on Environmental, Energy, and Structural Monitoring Systems","volume":"580 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134485016","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：