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In this work, we propose an object behavior evaluation system based on wireless sensor network. By the behavior information of objects contacted with human, it can evaluate the behavior characteristics of human under the interactions between human and environment, which goes beyond the traditional evaluation methods that directly monitor human themselves. The system can track and monitor the motion...
In this paper, we describe a 920 MHz band long range wireless SAW passive tag system (WSPTS) for vibration monitoring, which achieves more than 10m reading distance. For the purpose of structural health monitoring (SHM) of aging infrastructures (e.g. bridge, building, and so forth), passive wireless sensor systems are an attractive option because they are operated battery-less and almost maintenance...
In this paper, we describe a 920 MHz band long range wireless SAW passive tag system (WSPTS) for vibration monitoring, which achieves more than 15 m reading distance. For the purpose of structural health monitoring (SHM) of aging infrastructures (e.g. bridge, building, and so forth), passive wireless sensor systems are an attractive option because they are operated battery-less and almost maintenance...
Traditional wired vibration and acoustic sensors used for machine and structural monitoring are currently being replaced by low-cost MEMS-based wireless sensor networks (WSN). However, existing platforms are lacking in computing capabilities and integration, as well as the necessary software features to manage wireless sensing experiments. In this paper, we present a novel hardware-software platform...
WSN(Wireless Sensor Network) is an application specific network. There is no general optimized solution for WSN problems. It depends upon application, resource availability. Structural health monitoring (SHM) using wireless sensor networks has drawn considerable attention in recent years. It is an active area of research that can autonomously and proactively assess the structural integrity of buildings,...
Environmental temperature is essential for security monitoring and controlled areas, such as chemicals factory and Inflammable goods vehicle, in which WSN is the most appropriate choice for intelligent monitoring purpose. In this work, we design a piezoelectric energy harvester to collect low-acceleration (<0.5 g) and low-frequency (<50 Hz) vibration energy for powering wireless sensor network...
Structural health monitoring, which is the process of assessing the health of instrumented structures, is becoming increasingly important as much of the world's infrastructure ages and deteriorates. Wireless sensor networks (WSNs) have the potential to deliver continuous, highly accurate structural health monitoring at a low cost. In this paper, we present a novel WSN system that monitors ambient...
A self-powered event-triggered wireless sensor network was developed for monitoring sabotage activities. The network has the capability of identifying suspicious activities and automatically sending out alarming signals. The sensor network consists of self-powered wireless alarming sensor nodes (SWASNs), router nodes, receiver nodes, GSM network and PC terminal. The SWASN is powered by a novel vibration-threshold...
The fault rate of on-load tap-changer (OLTC) has always been in a high level, and that is exactly the primary reason of transformer faults. As a result, an on-line detection method of OLTC was proposed. The embedded platform and wireless sensor network (WSN) technology was introduced into the on-line detection system. WSN was used to obtain OLTC status information. The embedded platform software,...
Wireless Sensor Networks (WSNs) technology is considered an excellent compromise for supporting monitoring applications on old trains operated by railway systems around the world. Although WSNs are optimized for energy management with regards to sensor nodes and communication protocols, their lifetimes remain limited by battery capacity. Deployment of new sensors or replacement of empty batteries...
Wireless sensor networks (WSNs) are one of the emerging technologies in the 21st century. In the structural health monitoring (SHM). WSNs are used as one of the vitally capable technologies in the SHM. The accelerometer module in the existing sensor nodes enables several novel applications. In this paper, a prototype for monitoring and detecting the damage for the real bridge using these sensor nodes...
This paper proposes all-optical wireless sensor network architecture based on visible light communication (VLC) and free space optics (FSO) technologies which targets the monitoring of railways health state to ensure the security of trains traffic. To this purpose, we design a technique for detecting rails vibration using light-based sensor nodes. The detection includes an estimation of the amplitude...
As we know that energy is important part of our life. Energy available in different form like heat energy, solar energy, wind energy, etc. In our day to day life importance of alternative and renewable energy source increases year by year because of limited availability of non-renewable energy source. Hence it is necessary to take preventive action and increase the use of renewable energy source....
There is a persistent problem that continues to be a relevant demand for the chemical, oil, food and pharmaceutical industries, the fouling detection in ducts systems. This work shows the early tests to develop a platform for detecting fouling in pipes and analyze specific locations using the impact hammer test based on a wireless sensor network communication. To minimize the costs of maintaining...
This paper presents a novel electromagnetic-based bridge energy harvester (EBEH) utilizing bridge vibrations and ambient wind to harvest energy for wireless sensor nodes (WSNs) used for monitoring the health of bridges. The architecture, working principle, fabrication and characterization of the harvester is discussed. The harvester consists of a fixed wound coil, a permanent magnet, an airfoil, a...
In this work, a self-generated power capacitance measurement circuit for wireless health monitoring system is proposed. Hybrid energy from thermal and solar energy is expected to be used to supply the energy harvester. The present results has shown using low cost, off-the-shelf components, the capacitance measurement circuit is able to sense a linear capacitance range of 9.8 – 10.35 pF over 1.478...
WSNs are good options to help monitor the scene of interest and notify the unusual happening to control center. But sensors' high sampling rates lead to tremendous network traffic over the bandwidth-limited and energy-critical WSNs, hence how to reduce the network traffic while maintaining the unusual events monitoring function becomes important. In this paper, we investigate the intra-correlations...
Lifetime of wireless sensor nodes is a big challenge in bridge structural monitoring as these nodes may be deployed inside the bridges. In this situation, it is infeasible to replace batteries or harvest solar and wind energy. To prolong lifetime, vibration energy begins to be utilized to replenish energy for sensor nodes. In this study, a vibration energy harvester based on Micro Fiber Composite...
Smuggling/theft of most important trees such as sandal wood in forests, poses a serious threat to forest resources, causes significant economic damage and ultimately has quite a devastating effect on the environment all over the world. This paper propose a microcontroller based anti poaching system employing WSN technology, which is capable of detecting theft by monitoring the vibrations produced...
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