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Citizen Sensors for SHM: Towards a Crowdsourcing Platform.

Ozer E, Feng MQ, Feng D - Sensors (Basel) (2015)

Bottom Line: Crowdsourcing has given rise to citizen initiatives becoming a vast source of inexpensive, valuable but heterogeneous data.This platform can be further developed into an automated, smart, sustainable, cost-free system for long-term monitoring of structural integrity of spatially distributed urban infrastructure.Citizen Sensors for SHM will be a novel participatory sensing platform in the way that it offers hybrid solutions to transitional crowdsourcing parameters.

View Article: PubMed Central - PubMed

Affiliation: Department of Civil Engineering and Engineering Mechanics, Columbia University, 500 W 120th St, New York, NY 10027, USA. eo2327@columbia.edu.

ABSTRACT
This paper presents an innovative structural health monitoring (SHM) platform in terms of how it integrates smartphone sensors, the web, and crowdsourcing. The ubiquity of smartphones has provided an opportunity to create low-cost sensor networks for SHM. Crowdsourcing has given rise to citizen initiatives becoming a vast source of inexpensive, valuable but heterogeneous data. Previously, the authors have investigated the reliability of smartphone accelerometers for vibration-based SHM. This paper takes a step further to integrate mobile sensing and web-based computing for a prospective crowdsourcing-based SHM platform. An iOS application was developed to enable citizens to measure structural vibration and upload the data to a server with smartphones. A web-based platform was developed to collect and process the data automatically and store the processed data, such as modal properties of the structure, for long-term SHM purposes. Finally, the integrated mobile and web-based platforms were tested to collect the low-amplitude ambient vibration data of a bridge structure. Possible sources of uncertainties related to citizens were investigated, including the phone location, coupling conditions, and sampling duration. The field test results showed that the vibration data acquired by smartphones operated by citizens without expertise are useful for identifying structural modal properties with high accuracy. This platform can be further developed into an automated, smart, sustainable, cost-free system for long-term monitoring of structural integrity of spatially distributed urban infrastructure. Citizen Sensors for SHM will be a novel participatory sensing platform in the way that it offers hybrid solutions to transitional crowdsourcing parameters.

No MeSH data available.


Related in: MedlinePlus

Digital signal processing operations applied on the server-side.
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sensors-15-14591-f003: Digital signal processing operations applied on the server-side.

Mentions: The system is designed to provide an online SHM environment which is capable of being used by multiple users and multiple structures at the same time. The system receives the acceleration time history from the users, conducts discrete Fourier transform (DFT) analysis, determines peak frequency and stores the input and the output data with the submission details such as measurement date, record number, and user identification number. Figure 3 summarizes the digital signal processing applications implemented in server-side to apply band-pass filter to the acquired raw data and compute the natural frequency based on the DFT results [54].


Citizen Sensors for SHM: Towards a Crowdsourcing Platform.

Ozer E, Feng MQ, Feng D - Sensors (Basel) (2015)

Digital signal processing operations applied on the server-side.
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4507648&req=5

sensors-15-14591-f003: Digital signal processing operations applied on the server-side.
Mentions: The system is designed to provide an online SHM environment which is capable of being used by multiple users and multiple structures at the same time. The system receives the acceleration time history from the users, conducts discrete Fourier transform (DFT) analysis, determines peak frequency and stores the input and the output data with the submission details such as measurement date, record number, and user identification number. Figure 3 summarizes the digital signal processing applications implemented in server-side to apply band-pass filter to the acquired raw data and compute the natural frequency based on the DFT results [54].

Bottom Line: Crowdsourcing has given rise to citizen initiatives becoming a vast source of inexpensive, valuable but heterogeneous data.This platform can be further developed into an automated, smart, sustainable, cost-free system for long-term monitoring of structural integrity of spatially distributed urban infrastructure.Citizen Sensors for SHM will be a novel participatory sensing platform in the way that it offers hybrid solutions to transitional crowdsourcing parameters.

View Article: PubMed Central - PubMed

Affiliation: Department of Civil Engineering and Engineering Mechanics, Columbia University, 500 W 120th St, New York, NY 10027, USA. eo2327@columbia.edu.

ABSTRACT
This paper presents an innovative structural health monitoring (SHM) platform in terms of how it integrates smartphone sensors, the web, and crowdsourcing. The ubiquity of smartphones has provided an opportunity to create low-cost sensor networks for SHM. Crowdsourcing has given rise to citizen initiatives becoming a vast source of inexpensive, valuable but heterogeneous data. Previously, the authors have investigated the reliability of smartphone accelerometers for vibration-based SHM. This paper takes a step further to integrate mobile sensing and web-based computing for a prospective crowdsourcing-based SHM platform. An iOS application was developed to enable citizens to measure structural vibration and upload the data to a server with smartphones. A web-based platform was developed to collect and process the data automatically and store the processed data, such as modal properties of the structure, for long-term SHM purposes. Finally, the integrated mobile and web-based platforms were tested to collect the low-amplitude ambient vibration data of a bridge structure. Possible sources of uncertainties related to citizens were investigated, including the phone location, coupling conditions, and sampling duration. The field test results showed that the vibration data acquired by smartphones operated by citizens without expertise are useful for identifying structural modal properties with high accuracy. This platform can be further developed into an automated, smart, sustainable, cost-free system for long-term monitoring of structural integrity of spatially distributed urban infrastructure. Citizen Sensors for SHM will be a novel participatory sensing platform in the way that it offers hybrid solutions to transitional crowdsourcing parameters.

No MeSH data available.


Related in: MedlinePlus