The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
With the continuous progress of rural construction, the problem of rural drinking water pollution is increasingly prominent. In view of water pollution, a design of rural drinking water monitoring system based on wireless sensor networks is proposed that nodes take STM32 as the core chip and WLK01L39 as well as its peripheral circuits are used as wireless communication modules and Beidou S1216 is...
As wireless sensor networks become more ubiquitous in the world, the need for lightweight, resilient time synchronization protocols is apparent. Wireless nodes' internal clocks are subject to drift over time due to manufacturing imperfections and environmental changes. While various protocols have been introduced that attempt to correct for this drift, they each have their own peculiarities and issues...
We present the design, development, and deployment of an inexpensive, power-efficient, clustered, and scalable wireless sensor network (WSN) testbed. The testbed operates in a harsh environment in which neither GPS nor Internet connectivity are available. We use this testbed to collect real-time data during football games and other major events at Bobby Dodd stadium at Georgia Tech. The sensing devices...
In this paper a hierarchical wireless sensor network is designed and tested. Each node of the network is based on an ARM Cortex-M3 microcontroller from NXP and nRF24L01+wireless transceiver from Nordic operating in the 2.4GHz unlicensed band. The designed node is featured by high energy saving and large data rate capability. These features were obtained by proper time synchronization and transmit...
Due to low cost, high scalability and ease of deployment, wireless sensor networks (WSNs) have been considered a promising tool for structural health monitoring (SHM). Although many WSN-based SHM systems have been deployed, we notice that the design of many systems has deviated from the real requirements in SHM. For example, many systems focus on energy-efficiency, which is however not the requirements...
The parameters (measurements velocity, pulse transit time) are more often used to for cardiology diagnosis. They are essential for qualifications the arterial stiffness and change blood pressure. Can be useful to detect sleep respiratory events or microarousals. The article proposes two concepts aimed at solving the issue of measuring pulse wave velocity PWV and pulse transit time PTT. The first concept...
In this demo we demonstrate the functionalities of a novel experimentation framework, called WiSHFUL, that facilitates the prototyping and experimental validation of innovative solutions for heterogeneous wireless networks, including cross-technology coordination mechanisms. The framework supports a clean separation between the definition of the logic for optimizing the behaviors of wireless devices...
Structural Safety of buildings is a major issue. The ability to monitor the behavior of the buildings which are subject to seismic acceleration or anthropogenic activity may reveal whether there is or has been created a structural problem in each construction. Public buildings, especially schools are even more of critical importance not only because each day they are visited by hundreds of children...
A wireless system supporting concurrent physiological signal monitoring of multiple freely moving rats is presented. The wireless communication frees the subjects from the hassle of wires and reduces wire artifacts during recording. A combination of EEG and accelerometers eliminates the necessity for complicated video installation as well as time-consuming and tedious analysis of recorded videos....
Structural health monitoring (SHM) is of great significance for ensuring the using functions, safety operation of buildings and extending service lifetime of buildings. The structural damage detection is the main work of the structural health monitoring. In this paper, we proposed a new online structural damage detection method called N-stage Kalman Filter Algorithm (NS-Kalman). Its main idea is to...
Wireless machine-to-machine (M2M) networks are becoming a relevant topic in the field of home automation and advanced security systems. A wireless network for indoor intrusion detection is based on several sensors that are deployed over the monitored area for detecting possible risky situations and triggering appropriate actions in response. The network needs to support traffic patterns with different...
In the context of environmental monitoring, outdoor wireless cameras are vulnerable to natural hazards. To benefit from the inexpensive imaging sensors, we introduce a multi-camera monitoring system to share the physical risk. With multiple cameras focusing at a common scenery of interest, we propose an interleaved sampling strategy to minimize per-camera consumption by distributing sampling tasks...
This article describes our experience from the implementation of PRISM in the Castalia simulator. PRISM is a recently-proposed protocol for real-time monitoring in single-hop and multi-hop wireless sensor networks. The protocol allows to define the maximum number of nodes, the requirements on the network synchronization and the data-rate in a flexible manner, in order to accommodate for different...
We present a novel power-efficient wireless sensor network for continuously monitoring and analyzing seismic vibrations with sensor nodes and forwarding the retrieved information with low-cost relay nodes to backend applications. The applied vibration sensing algorithms are derived from the DIN 4150–3 standard. All nodes in the network are battery-powered and equipped with an IEEE 802.15.4 compatible...
Utilizing service oriented architectures to enhance seamless collaborations and information sharing among nodes in mobile ad hoc networks with limited communication capability is a challenging task. In this paper a novel tree-based service discovery mechanism, able to achieve high accuracy in the process of service discovery, is proposed, which affords wireless communication overheads nearly linear...
Aiming at the monitoring environment characteristics, an on-line monitoring system of power cable joints temperature based on the combination of CAN wired transmission and ZigBee wireless network is designed. The structure, principle, software and hardware design of the system are given in this paper. By combining of CAN Bus and ZigBee network, not only long-distance transmission and wide range monitoring...
Wireless Sensor Network is an emerging technology which can significantly reduce the cost and the time needed to monitor the conditions of civil structures. This work presents W-TREMORS, a new wireless sensing system for high-frequency distributed data acquisition. Our sensor network is based on the low-power and low-data rate standard IEEE 802.15.4, and we used inexpensive hardware. Nevertheless,...
Reliable communication is crucial for successful deployment of a wireless sensor network. Many environmental factors can affect the performance of radio links, and the deployment of a network without real-time information about link qualities can be a demanding task. This paper describes the CiNetView application that is intended to support the deployment and monitoring of wireless sensor network...
The problem of power quality in power network is a critical task. Several methods based on multi point measurement techniques have been proposed proving a good contribution on this filed. In this paper a wireless event-based distributed measurement system has been developed. The proposed wireless network adopts a two-level hierarchical approach to monitor the power network composed by a sensing parts...
This work demonstrates a condition-based solution for monitoring the long-term health of a system with moving or rotating parts. This is accomplished through the direct measurement of loads appearing on the structure by means of a synchronized network of wireless sensors. The wireless sensors exhibit extremely low power requirements, allowing high sampling rates while sustaining battery life entirely...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.