دانلود رایگان مقاله شبکه سنسور ابر مبتنی بر پایش محیطی

Abstract

This paper describes a complete infrastructure for environmental monitoring, which is based on a cloud architecture. The proposed system employs small button-like battery-operated sensors, which connect through a wireless link to small receivers capable of routing data to the cloud system. Cloud data can be accessed in real time through smart phones and downloaded for further analyses. Each button-like sensor is capable of measuring temperature and humidity for more than one year without attendance. All data are sent to the receiver and in addition stored inside the button memory so that the system can work also in the absence of power and Internet connection. The architecture takes advantage of the µP anel environment, which is conceived to work also with unreliable and slow Internet connections and permits to implement a cloud-based infrastructure with the capability to control the sensors locally and in absence of Internet connectivity. The proposed architecture is currently used in different museums to monitor the local environment inside the display rooms, but the system can be easily extended to open environments without additional costs.

7. Conclusions

The problem of environmental monitoring inside museums as well as inside many other types of buildings where a controlled environment is required is becoming more and more requested.

In most cases the constraints related to the invasiveness of the available systems prevent the use of off-the-shelf solutions, and specific solutions have to be developed that have to be tailored for each specific application. This paper describes a flexible architecture which employs a cloud processing and a possible implementation based on the µP anel environment that permits an extremely easy and fast deployment of complex monitoring systems.

The proposed solution permits to have real time clients based on personal smart-phones for unconstrained and ubiquitous monitoring, but also processing clients to show the monitoring history and to perform complex analyses. The real time system to be used with the smart-phones employs an extremely compact transmission scheme, is designed to work also in case of networks with limited throughput and support the push notifications to timely deliver alarm to the users. Despite the described implementation focuses on temperature and humidity monitoring, the possibility to add low-power GAS sensors [21, 22], such as those based on optical fibers [23], is being investigated for future implementations.