Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 194 for “"Sensor nodes"”.
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RF Harvesting System for Remotely Powered Wireless Sensor Nodes
Wireless sensor networks (WSNs) based on batteryless nodes have been attracting an increasing attention in the scientific and industrial communities. Energy to replace battery can be extracted from environmental sources such as vibration, solar, thermal, or provided by RF carrier of a power …
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Urban Sound and Environmental Monitoring using Distributed IoT Sensor Nodes
… using distributed Internet of Things (IoT) sensor nodes, including the ability to on-site classify sounds based on their sources. The two key components in the proposed approach are data acquisition and on-site robust sound classification. First, this thesis proposes a novel Wireless Sensor …
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A Unifying Interface Abstraction for Accelerated Computing in Sensor Nodes
… very suitable to develop the next generation of sensornet applications, which have high computational demands. By making use of a low power FPGA, the peak computational performance of a sensor node can be improved without significant degradation of the standby power dissipation. In this …
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Hardware-Software Co-Design for Sensor Nodes in Wireless Networks
… evaluating different design options for wireless sensor networks (sensornets) and hence, have been intensively studied in the past decades. However, existing simulators only support evaluations of protocols and software aspects of sensornet design. They cannot accurately capture the significant …
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Ultrasound Data Communications for Ultra-low-power Wake-up in Sensor Nodes
In the power-starved wireless sensor node application, the main transceiver has to be duty-cycled to prolong the node battery lifetime. Wake-up is among the lowest power schemes to accomplish this; an always ON low-power receiver called the wake-up receiver is used to turn ON the main receiver when …
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A Wide Input Power Line Energy Harvesting Circuit For Wireless Sensor Nodes
… can be applied to various types of wireless sensor nodes with different internal impedances. Experimental results show that the proposed system achieves an efficiency of 80.99% under the powerline current of 50 A.
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Development of Low-power Wireless Sensor Nodes based on Assembled Nanowire Devices
Networked wireless sensor systems have the potential to play a major role in critical applications including: environmental monitoring of chemical/biological attacks; condition-based maintenance of vehicles, ships and aircraft; real-time monitoring of civil infrastructure including roads, bridges …
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Radio propagation analysis for improved UAV data muling of surfaced underwater sensor nodes
… and evaluation mechanisms for data muling water sensor nodes via unmanned air vehicle. We present a mathematical model for predicting signal strength with respect to distance and height using a two-ray propagation model in conjunction with the individual radiation patterns of transmitting and …
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An 8-Bit Analog-to-Digital Converter for Battery Operated Wireless Sensor Nodes
… available power and size is limited for wireless sensor nodes in many applications, a medium resolution Analog-to-Digital Converter (ADC) is proposed to convert a sensed voltage with moderate speeds to lower power consumption. Specifications also include a rail-to-rail input range and minimized …
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Ultra Low Power Wake-up Receiver with Unique Node Addressing for Wireless Sensor Nodes
… is the most power hungry block of a wireless sensor node, needs to listen for the incoming signal continuously. An alternative scheme, is to listen for the incoming signal at a predetermined internal, which saves power at the cost of increased latency. Another and more sophisticated scheme is …
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Energy Harvesting Opportunities Throughout the Nuclear Power Cycle for Self-Powered Wireless Sensor Nodes
Dedicated sensors are widely used throughout many industries to monitor everyday operations, maintain safety, and report performance characteristics. In order to adopt a more sustainable solution, much research is being applied to self-powered sensing, implementing solutions which harvest wasted …
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Performance Analysis of Cluster Based Communication Protocols for Energy Efficient Wireless Sensor Networks. Design, Analysis and Performance Evaluation of Communication Protocols under Various Topologies to Enhance the Lifetime of Wireless Sensor Networks.
Sensor nodes are deployed over sensing fields for the purpose of monitoring certain phenomena of interest. The sensor nodes perform specific measurements, process the sensed data, and send the data to a base station over a wireless channel. The base station collects data from the sensor nodes, …
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Semantic In-Network Complex Event Processing for an Energy Efficient Wireless Sensor Network
Wireless Sensor Networks (WSNs) consist of spatially distributed sensor nodes that perform monitoring tasks in a region and the gateway nodes that provide the acquired sensor data to the end user. With advances in the WSN technology, it has now become possible to have different types of sensor …
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Heterogeneity-aware and energy-aware scheduling and routing in wireless sensor networks
A Wireless Sensor Network (WSN) is a group of specialized transducers, called sensor nodes, with a communication infrastructure intended to monitor and record conditions at diverse locations. Since WSN applications are usually deployed in an open environment, the network is exposed to rough weather …
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Mutual information based tracking with mobile sensors
In order to utilize mobile sensor nodes in a sensing and estimation problem, one must carefully consider the optimal placement of those sensor nodes and simultaneously account for the cost incurred in moving the sensor nodes. We present an approximate dynamic programming approach to a tracking …
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Using light underwater : devices, algorithms and systems for maritime persistent surveillance
… the integration of (1) a network of underwater sensor nodes with acoustic and optical communication, (2) an autonomous underwater vehicle (AUV) and (3) a novel sensing device. A key characteristic is the extensive use of visible light for information transfer underwater. We use light for …
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LunarWSN: A Wireless Sensor Network for In-Situ Lunar Water Ice Detection
… where data of interest often exists. Wireless Sensor Networks (WSNs) are a technology that is typically dedicated to collecting in situ sensing data from regions of interest. A WSN is composed of multiple sensor nodes that are relatively small, light, and easy to deploy. The sensor nodes are …
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