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 37 for “"wireless 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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A Wide Input Power Line Energy Harvesting Circuit For Wireless Sensor Nodes
Massive deployment of wireless IoT (Internet of Things) devices makes replacement or recharge of batteries expensive and impractical for some applications. Energy harvesting is a promising solution, and various designs are proposed to harvest power from ambient resources including thermal, …
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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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An 8-Bit Analog-to-Digital Converter for Battery Operated Wireless Sensor Nodes
<p>Wireless sensing networks (WSNs) collect analog information transduced into the form of a voltage or current. This data is typically converted into a digital representation of the value and transmitted wirelessly using various modulation techniques. As the available power and size is limited for …
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Ultra Low Power Wake-up Receiver with Unique Node Addressing for Wireless Sensor Nodes
… implant devices. For this reason, devices for Wireless Body Area Network (WBAN) applications must consume very little power. To save power, it is desirable to turn off or put to sleep a device when not in use. However, a transceiver, which is the most power hungry block of a wireless sensor …
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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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Event Driven Protocols for Energy Efficient Wireless Sensor Networks
As human sensory structures are often restricted to sensing a small range of visual, hearing, smell, taste, and touch events, the need for extending humans’ limited sensory abilities has been a driving force for research, inventions and innovations that have led to discoveries of tools such as …
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A Study on Energy Harvesters for Physical Unclonable Functions and Random Number Generation
As the broad implementation and use of wireless sensor nodes in Internet of Things (IOT) devices increase over the years, securing personal data becomes a growing issue. Physical unclonable functions (PUFs) and random number generators (RNGs) provide methods to generate security keys for data …
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An energy-efficient routing protocol for Hybrid-RFID Sensor Network
… about the condition of the objects they detect. Wireless sensor networks (WSNs), on the other hand provide information about the condition of the objects as well as the environment. The integration of these two technologies results in a new type of smart network where RFID-based components are …
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Implementing Sink Mobility and Recharging Policies Using an Unmanned Aerial Vehicle
<p>Wireless sensor networks (WSNs) have been a topic of research for decades. Researchers have been exploring different uses for UAVs with their growing popularity. In this thesis I develop a wireless sensor network (WSN) and introduce the theoretical effects of an unmanned aerial vehicle (UAV) for …
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Energy Harvesting Circuit for Indoor Light based on the FOCV Method with an Adaptive Fraction Approach
… The designed circuits are intended to power wireless sensor nodes (WSNs) or other computing unit such as microcontrollers or DSPs to provide a power solution for Internet of Things (IoTs). The proposed circuit can extract maximum power from the PV panel by utilizing the maximum power point …
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Modelling and simulation of wireless information and power exchange protocol with power splitting for energy sustainability in device-to-device communications
Wireless Information and Power Exchange (WIPE) protocols are very important on the Internet of thing (IoT) wireless sensor communication. With this scheme, the nodes can control and manage their power. Also, with the scheme, one will know which nodes consume more powers and which nodes consume …
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STUDY OF ADAPTIVE COMPRESSIVE SENSING FOR LOW POWER APPLICATIONS
… it appealing for implementation of low-power sensors. This dissertation investigates techniques to further improve CS efficiency by adaptively adjusting the sampling rates or CS measurement sizes according to signal sparsity variations. The proposed technique is referred to as adaptive …
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[mu]Jawstures : jaw-teeth microgestures for discreet hands-and-eyes-free mobile device interaction
… an opportunity remains to investigate ways to wirelessly and unobtrusively sense these gestures, and further explore and evaluate the design space for jaw and teeth microgestures in the context of general-purpose Human Computer Interaction. This thesis makes four major contributions to the …
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Modeling and design of a MEMS piezoelectric vibration energy harvester
… the need for pervasive and limitless power for wireless sensor nodes that have application in structural health monitoring, homeland security, and infrastructure monitoring. A review of prior milli- to micro-scale harvesters is provided. Common ambient low-level vibration sources are …
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Modeling and analysis of multi-hop routing in wireless sensor networks by using matlab
… to the limited energy and the non-equivalence of wireless sensor network nodes, it is imperative to reduce and rationally use the energy consumption of the nodes to prolong the network lifetime. In this project, a random multi-hop routing approach for wireless sensor networks was modeled and …
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Performance of various forecasting algorithms to reduce the number of transmitted packets by sensor node in wireless sensor networks
The development of wireless sensor networks originated in military research and the application of monitoring conflict areas. One of the main features of WSNs is the limited energy of their wireless sensor nodes. Energy consumption is an important issue in WSN. Reducing the number of transmission …
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Asic Design of RF Energy Harvester Using 0.13UM CMOS Technology
<p>Recent advances in wireless sensor nodes, data acquisition devices, wearable and implantable medical devices have paved way for low power (sub 50uW) devices. These devices generally use small solid state or thin film batteries for power supply which need replacement or need to be removed for …
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Receiver-Assigned CDMA in Wireless Sensor Networks
A new class of Wireless Sensor Networks (WSNs) is emerging within the Internet of Things (IoT) that features extremely high node density, low data rates per node, and high network dependability. Applications such as industrial IoT, factory automation, vehicular networks, aviation, spacecraft and …
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