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 17 of 17 for “"Power sensors"”.
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Fine-grained Energy and Thermal Management using Real-time Power Sensors
With extensive use of battery powered devices such as smartphones, laptops and
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GeoPak : monitoring climbers and climate on Mount Everest
… uses the Global Positioning System (GPS) and low power sensors to collect information about location, temperature, humidity, air pressure, and light. A radio transmitter then sends this information to a remote base station, letting people far away monitor the 'Pale In May, 1998, the geoPak was …
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Lithium ion power generator : a novel system for direct thermal to electric energy conversion
… to miniaturization and true autonomy is how to power sensors. Lithium ion batteries have been ideal power sources due to their high power density, but autonomy requires some form of power generation. The unique demands of miniaturization require power generation that can be isothermal and have a …
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STUDY OF ADAPTIVE COMPRESSIVE SENSING FOR LOW POWER APPLICATIONS
… making 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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Low-cost air particulate monitor based on particle capture and imaging
… creates a huge demand for air particulate sensors meant for small-scale measurement. However, today's air particulate monitoring technologies suffer from high cost, high power requirements, or large size, which presents an opportunity to create low-cost, compact, and low-power sensors that …
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Adaptive thermal comfort computation with Zigbee wireless sensor networks
… of System-On-Chip boards, and low cost and low power sensors have made wireless sensor networks easy accessible and usable. Zigbee (802.15.4) operated wireless sensor networks have been commonly used in home automation, building automation, personal health care and fitness, consumer electronics, …
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Wireless transmission of power for sensors in context aware spaces
In the present thesis I create and use wireless power as an alternative to replace wiring and batteries in certain new scenarios and environments. Two specific scenarios will be highlighted and discussed that motivated this research: The Interactive Electromechanical Necklace and the …
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Semi Autonomous Vehicle Intelligence: Real Time Target Tracking For Vision Guided Autonomous Vehicles
… the limitations inherent in small UVs, including power consumption and payload, the selection of light weight and low power sensors and processors becomes critical. Low power CMOS cameras and real-time vision processing algorithms can provide fast and reliable information to the UVs. These vision …
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Milling cutter software architecture for force and surface finish modeling
… that calibration is limited to a spindle motor power sensor. Although more restricted, motor power sensors are cheaper and more practical alternative to table dynamometers for force model calibration purposes. Calibration of the force models with a motor power sensor is derived and their …
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Inkjet Printed Graphene-Based Smart Gas Sensors
… sensing is dominated by metal oxide (MOx) based sensors due to their balance of performance and cost as well as the opportunity for simple device integration, potential for miniaturisation and incorporation into multi-analyte detection systems. However, MOx sensors have significant shortcomings …
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Nonlinear Effects in Contactless Ultrasound Energy Transfer Systems
… offers the capability to safely and efficiently power sensors and devices while eliminating the need to replace batteries, which is of interest in many applications. It has been proposed to recharge and communicate with implanted medical devices, thereby eliminating the need for invasive and …
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Baseline-Free and Self-Powered Structural Health Monitoring
… technique that involves placing intelligent sensors on a structure, periodically recording data from the sensors, and using statistical methods to analyze the data in order to assess the condition of the structure. This work focuses on improving two areas of SHM; baseline management and …
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A Multilayer Framework for Quality of Context in Context-Aware Systems
… context (e.g. device capabilities and battery power). Sensors are the main mean of capturing context. Unfortunately, sensed context data are commonly prone to imperfection due to the technical limitations of sensors, their availability, dysfunction, and the highly dynamic nature of environment. …
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Power management circuits for ultra-low power systems
Power management circuits perform a wide range of vital tasks for electronic systems including DC-DC conversion, energy harvesting, battery charging and protection as well as dynamic voltage scaling. The impact of the efficiency of the power management circuits is highly profound for ultra-low …
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A deep sea lab on a chip chemical sensor
… that can be used as small, low-cost and low power sensors. There are numerous demonstrations of these devices in the laboratory where it is possible to use standard bench top equipment to operate them. Within the National Oceanography Centre Southampton and the Nanoscale System Integration …
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Harmonizing Actuation and Data Collection in Low-power and Lossy Networks: From Standard Compliance to Rethinking the Stack
… are often very small in size, autonomously-powered, and have restricted computational and communicational capabilities. Low-power and Lossy Networks (LLNs) are multi-hop, typically wireless, self-organising networks aimed at interconnecting hundreds or thousands of such embedded devices. …
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Piezoelectric Energy Harvesting for Powering Wireless Monitoring Systems
The urgent need for a clean and sustainable power supply for wireless sensor nodes and low-power electronics in various monitoring systems and the Internet of Things has led to an explosion of research in substitute energy technologies. Traditional batteries are still the most widely used power …