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 21 for “"capacitive sensor"”.
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MULTI-CHANNEL CDMA-LIKE CAPACITIVE SENSOR INTERFACE CIRCUITS
… is governed by three components, i.e. advanced sensors, low-power and low-cost sensor interface circuits and efficient wireless connections. This thesis introduces a CDMA-like period modulation multi-capacitive-sensor interface circuit, which targets at the IoT applications. The proposed …
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Design of a low power capacitive sensor for a micromachined accelerometer
Anew possible commercial application for a micromachined accelerometer is for use in handheld devices such as personal digital assistants and cellular phones, as an intuitive method of data entry which does not consume space on the ever-shrinking exterior. These devices are battery powered, which …
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Development of capacitive sensor to determine void fraction in horizontal and vertical tubes
… fraction compared that of lower mass flux. A new capacitive sensor aimed to measure void fraction is designed and built. With this capacitive sensor, characterizing flow patterns appear in low mass flux range and measuring void fraction for horizontal and vertical tubes can be achieved. Signal …
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Development of Micro Thermal Actuator with Capactive Sensor
… A novel thermal actuator with integrated capacitive position sensor is also investigated. This new thermal actuator with an integrated capacitive sensor uses the indirect heating thermal actuator discussed in the first part of the thesis to achieve a new integration method. The …
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Feedback loop design and experimental testing for integrated optics with micro-mechanical tuning
I designed a capacitive sensor with feedback control for precision tuning of a MEMS controlled wavelength-selective switch. The implementation is based upon a customized feedback loop with a PID controller. The positional stability of the bridge can be controlled to within 0.5 [Angstroms], and the …
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Design of integrated capacitive sensors for particulate matter detection
… overcoming the issues of currently available PM sensors, in this thesis we propose a mm-scale in-flow integrated capacitive sensor of granulometry and concentration. The sensor relies on a capacitive sensor array which will be composed of a suitable number of electrodes forming planar capacitors …
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Smart Ocular Implant for Monitoring IOP in Glaucoma Patients
… Today’s implantable IOP devices mainly use capacitive IOP sensors as the primary operating device for remote excitation and data acquisition. Most of the research has focused on developing sensors, mainly using metal layers as the conductive plates of a capacitive sensor. Large stationary …
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A Design and Fabrication Pipeline for Integrating Rotary Encoders into 3D Printed Mechanisms
… rotation, and speed. MechSense encoders utilize capacitive sensing by integrating a floating capacitor into the rotating element and three capacitive sensor patches in the stationary part of the mechanism. Unlike existing rotary encoders, MechSense does not require manual assembly and can be …
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Capacitive displacement sensing for the Nanogate
… describes the development of an integrated capacitive displacement sensor which enables nanometer precision measurement of the separation of the surfaces of the Nanogate. The work in this thesis can be divided into two parts: fabrication of a new version of the Nanogate and the development …
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Impedance spectroscopy for cellular and biomolecular analysis
… with time.<br/>Finally, a silicon-based capacitive sensor with nanometric plate separation (nanogap capacitor), is characterized by impedance spectroscopy, and used to explore the behaviour of double layers constrained in cavities of dimensions comparable to the Debye length.
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Functional Materials and Device Concepts for Magnetic Sensing, Gas Detection and Energy Harvesting
… their potential integration into self-sustaining sensor platforms for Internet of Things (IoT) applications, amid growing demand for sensing systems in industrial, environmental, and biomedical fields. The first part addresses passive, highly sensitive magnetic-field sensors for low-power and …
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Integrated Wearable Devices for Prosthetic Applications
… necessary to develop new technologies to improve sensory feedback and implement control strategies to enhance the functionality of prosthetic hands. This thesis seeks to address these needs and presents three main contributions to the design and implementation of wearable front-end devices for …
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Impedimetric Sensor System for Edible Oil Quality Assessment
… illnesses like heart diseases. For this purpose, sensor systems for oil quality assessment are necessary. In fact, changes of the composition due to frying leads to variation of its dielectric parameters. This can be measured using a capacitive sensor and the measurement of its impedance change. …
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A skin surface characterization system based on capacitive image analysis
… characterization system based on the analysis of capacitive images of the skin surface. The system relies on a CMOS portable capacitive device which gives 50 micron/pixel resolution capacitance map of the skin micro-relief. In order to extract characteristic features of the skin topography, image …
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Low-Cost Grain Bin Moisture Sensor Using Multiple Capacitive Elements
… and therefore a need for a reasonable cost sensor to continuously monitor the moisture inside the bins. Historically, moderately expensive capacitance based instruments have been used to measure grain moisture samples to an accuracy of ±0.1% w.b. However, these moisture meters only work …
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The void fraction in headers of microchannel heat exchangers
… compared to that of lower mass flux. A new capacitive sensor is then built and used to measure the void fraction and characterize flow regimes of both horizontal and vertically upward flow in the low mass flux range in circular tubes with an inner diameter of 7 mm. Three sensors with …
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MICROELECTRODE ARRAY FOR CAPACITIVE TRANSDUCTION OF RETINAL RESPONSES
… of neural prosthetic interfaces to restore sensory or motor function in affected individuals. Advances in neural sensing and stimulation interface technology will allow a more comprehensive understanding of neural function while leading to the development of hybrid biological-electronic …
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Dual parametric sensors for highly sensitive nucleic acid detection
… development of a molecular scale (nano-scale) capacitive sensing mechanism for the highly sensitive and label-free detection of Nucleic Acid hybridization. These novel capacitive sensors with nano-scale electrode spacing offer solutions to many problems suffered by the conventional signal …
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Design and development of a sensory feedback system for transradial amputees using body powered prostheses
… their prostheses largely owing to the lack of sensory feedback received. The aim of this study was to develop a non-invasive sensory feedback system, including proprioceptive feedback, to work in conjunction with an existing body powered prosthesis that provides the user with increased tactile …
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Torsion Pendulum Testing of the LISA Charge Management System
… between the test masses and the surrounding capacitive sensor. Most of such electrostatic forces scale with the electric charge deposited on the test masses. This problem is aggravated by the fact that isolated objects in space, such as the floating LISA test masses, accumulate electric …
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