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A Wireless Sensor Network Ad-Hoc Designed as Anti-Theft Alarm System for Photovoltaic Panels

Wireless Sensor Network 2012年第4期4卷 107-112页

作者： Silvano Bertoldo oscar rorato Claudio Lucianaz Marco Allegretti Dipartimento di Elettronica e Telecomunicazioni Politecnico di Torino corso Duca degli Abruzzi Torino Italy

Photovoltaic (PV) systems have attracted increasing attention in last years as well as Wireless Sensor Networks (WSNs), which have been used in many application fields. In PV plants, especially in ground installations, a lot of thefts and damages occur due to the still high cost of the modules. A new experimental WSN ad-hoc has been designed to be an anti-theft alarm system. Each node of the network is directly installed under each PV string and it is equipped with an accelerometer sensor capable to detect a minimum displacement of the panel from its steady position. The WSN presents a star topology: a master node cyclically interrogates the slave nodes through RF link. It collects all the nodes responses and communicates though a RS-232 interface with a control PC checking the network status. When a slave node detects an alarm, continuous messages are sent to the control PC which turns on all the alarm signaling systems. The control PC is equipped with an open source operative system and software and provides for SMS, e-mail and sound-light signaling in case of alarm. It also communicates with a remote server where all the WSN information is stored. A first low cost experimental WSN has been already installed and it is working properly.

关键词： WSN Alarm System Photovoltaic System Electronic Board Ad-Hoc Designed Board Low Cost Ad-Hoc Protocol

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An Ad-Hoc Low Cost Wireless Sensor Network for Smart Gas Metering

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Wireless Sensor Network 2013年第3期5卷 61-66页

作者： oscar rorato Silvano Bertoldo Claudio Lucianaz Marco Allegretti Riccardo Notarpietro Department of Electronic and Telecommunications (DET) Polytechnic of Turin Turin Italy National Consortium of Universities for the Physics of Atmospheres and Hydrospheres (CINFAI) Local Unit c/o Polytechnic of Turin Turin Italy

The monitoring of power consumption has become of a great interest in recent years as well as the innovative technologies available to realize Wireless Sensor Networks (WSNs) have experienced a great growth. While smart metering technologies for electric energy are already established, as sensors power supply comes directly from power lines, WSN nodes for gas metering should necessarily be equipped with long life batteries. The presented work describes a new prototypal low cost WSN designed ad hoc for gas smart metering. The network has a star topology: each sensor node can be completely integrated with standard reed relay gas meter, and it is capable to measure the gas consumption. The information is sent to the central node (the Access Point, AP) through an RF links. The sensor nodes have been designed with custom electronics and a proprietary firmware, in order to work with a common 3.6 V lithium battery which is able to ensure a life period of about 10 years for each node. Only the AP must be connected directly to electric power. The AP is connected through the RS-232 interface to a control embedded PC equipped with a LAMP (Linux, Apache, MySQL, PHP) framework: it stores all the information coming from each node in a coherent database and allows authorized users to check the network status using a web interface. The WSN is self-learning and it is capable to detect new nodes joining the network without altering the normal operative flow. Moreover e-mail and SMS alerts can be activated to alert if a node is disconnected from the network or some problems occur. A first prototype of the WSN has been already tested achieving good results.

关键词： WSN Smart Grid Smart Metering Gas Metering Energy Metering Electronic Board Ad-Hoc Designed Board Low Cost

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X-Band Mini Radar for Observing and Monitoring Rainfall Events

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Atmospheric and Climate Sciences 2012年第3期2卷 290-297页

作者： Marco Allegretti Silvano Bertoldo Andrea Prato Claudio Lucianaz oscar rorato Riccardo Notarpietro Marco Gabella CINFAI (Consorzio Interuniversitario per la Fisica delle Atmosfere e delle Idrosfere) unità locale presso Politecnico di Torino corso Duca degli Abruzzi Torino Italy DET (Dipartimento di Elettronica e Telecomunicazioni) Politecnico di Torino corso Duca degli Abruzzi Torino Italy Envisens Technologies s.r.l. località Baraggino Campus Tecnologico Chivasso Italy MeteoSwiss Locarno Monti Switzerland

Quantitative precipitation estimation and rainfall monitoring based on meteorological data, potentially provides continuous, high-resolution and large-coverage data, are of high practical use: Think of hydrogeological risk management, hydroelectric power, road and tourism. Both conventional long-range radars and rain-gauges suffer from measurement errors and difficulties in precipitation estimation. For efficient monitoring operation of localized rain events of limited extension and of small basins of interest, an unrealistic extremely dense rain gauge network should be needed. Alternatively C-band or S-band meteorological long range radars are able to monitor rain fields over wide areas, however with not enough space and time resolution, and with high purchase and maintenance costs. Short-range X-band radars for rain monitoring can be a valid compromise solution between the two more common rain measurement and observation instruments. Lots of scientific efforts have already focused on radar-gauge adjustment and quantitative precipitation estimation in order to improve the radar measurement techniques. After some considerations about long range radars and gauge network, this paper presents instead some examples of how X-band mini radars can be very useful for the observation of rainfall events and how they can integrate and supplement long range radars and rain gauge networks. Three case studies are presented: A very localized and intense event, a rainfall event with high temporal and spatial variability and the employ of X-band mini radar in a mountainous region with narrow valleys. The adaptability of such radar devoted to monitor rain is demonstrated.

关键词： X-Band Radar Rainfall Event Precipitation Monitoring Rain-Gauge Comparison High Temporal Resolution High Spatial Resolution Rainfall Observation

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