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 105 for “"temperature sensor"”.
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Polarimetric Temperature Sensor Using Core-replaced Fiber
… can be used to create a polarimetric sensor. The elliptical core supports two orthogonal modes that have separate effective indices of refraction. The indices of refraction change with a change in temperature. Since the effective indices of refraction change differently for the two …
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Development and Testing of a Multiplexed Temperature Sensor
… studying phenomena associated with steep surface temperature gradients, such as boiling, need to be able to obtain a detailed surface temperature distribution. Such a distribution can be obtained by taking measurements at a number of discrete locations on the surface using multiple individual …
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A temperature-compensated RC oscillator using temperature sensor
… This thesis introduces a practice of utilizing a temperature sensor to compensate for an RC oscillator based on FLL (frequency-locked loop), on the same die of the temperature sensor, with the assistance of a frequency counter and a computer. The TCO (temperature-compensated oscillator) and the …
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Optical fiber temperature sensor based on fiber bragg grating
It is important to study optical fiber temperature sensor based on fiber Bragg Grating. The Fiber Bragg grating sensors can offer highly sensitive, cost effective solutions for optical sensing. While fiber Bragg gratings have been implemented in various sensing applications over the past few …
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Fabry-Perot Sapphire Temperature Sensor for Use in Coal Gasification
Sapphire fiber based temperature sensors are exceptional in their ability to operate at temperatures above 1000C and as high as 1800C. Sapphire fiber technology is emerging and the fiber is available commercially. Sapphire fiber has a high loss, is highly multi-mode and does not have a solid …
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Optical Frequency Domain Reflectometry Based Quasi-distributed High Temperature Sensor
Temperature sensing in harsh environment is desired in many areas, such as coal gasification, aerospace, etc. Single crystal sapphire is an excellent candidate for construction of harsh environment sensors due to its superior mechanical and optical properties even at temperature beyond 1600°C. The …
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Design of a Bandgap-Less Temperature Sensor for Achieving High Untrimmed Accuracy
Temperature sensors are extensively used in measurement, instrumentation and control systems. CMOS based temperature sensors offer benefits of low cost and direct digital outputs over conventional sensors. However, they are limited in their absolute accuracy due to the non-ideal behaviour of the …
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Real time, integrated, paper based temperature sensor for lab on a chip device
Temperature measurement and manipulation is a critical factor in a wide range of applications like Point Of Care Diagnostics (POC's), Polymerase Chain Reaction (PCR), Temperature Gradient Focusing (TGF) to cite few prominent examples. In the past decade, researchers have used various techniques to …
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Self-Calibrated Interferometric/Intensity Based Fiber Optic Temperature Sensors
… of providing robust and reliable fiber optic temperature sensors capable of operating in harsh environments, a novel type of fiber optic sensor system titled self-calibrated interferometric/intensity-based (SCIIB) fiber optic temperature sensor system is presented in this thesis including the …
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Development of smart monitoring system using IOT
… general idea behind the project is to provide temperature and humidity readings, appliances control plus the security. All the systems are controlled using IoT technology. The designed system consists of microcontroller as a main component, the humidity & temperature sensor as well as the …
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Sapphire Fiber Optic Sensor for High Temperature Measurement
… for ultra-low-cost sapphire fiber-optic high-temperature sensors. The research is divided into three major parts, the souceless sensor, the simple Fabry-Perot (F-P) interrogator, and the sensor system. Chapter 1 briefly reviews the background of thermal radiation, fiber optic F-P sensors, and …
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Remote temperature sensing with low-threshold-power using erbium-doped fiber laser
Remote temperature sensing is of significant interest nowadays as it can continuously monitor structures located at tens or hundreds of kilometers away from a central location. With remote sensing, any damage of structures can be detected immediately, thus appropriate action can be taken quickly. …
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Flexible sensors for high-quality recording and human-computer interface
… augment, assist and repair the cognitive, sensory, and motor functions. Due to the soft nature of human skin and tissues, the conventional rigid human-computer interfaces face challenges in biocompatibility, wearability, comfortability, and high signal-to-noise (SNR) ratio for long-term and …
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Theoretical, Experimental, and Numerical Investigations Into Laser Repair of Adhered MEMS Structures
A MEMS temperature sensor based on the buckling of fixed-fixed beams due to thermal expansion is designed, fabricated, and tested. Difficulties from fabrication including residual stress, and limited temporal and spatial resolution of the imaging system hindered the device performance, but …
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Novel Optical Sensors for High Temperature Measurement in Harsh Environments
Accurate measurement of temperature is essential for the safe and efficient operation and control of a vast range of industrial processes. Many of these processes involve harsh environments, such as high temperature, high pressure, chemical corrosion, toxicity, strong electromagnetic interference, …
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Plasma Treatment of Zinc Oxide Thin Film and Temperature Sensing Using the Zinc Oxide Thin Film
… the as deposited film. This work also reports a temperature sensor based on the temperature-dependent bandgap of zinc oxide semiconductors. Transmittance measurement of the ZnO films at different temperatures showed sharp absorption edge at around 380 nm and red shift characteristics. An optical …
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Wireless Monitoring of Driver's Pulse Rate and Temperature Using Hand Gloves Approach
… <p>The proposed project focuses on a wearable sensor glove that equipped with a pulse rate sensor, Temperature sensor, conductive thread, and an embedded system consisting of amplifier unit, power supply, microcontroller, and Zigbee transmitter unit. . This project consists of three systems: …
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Development of ultra-stable MEMS oscillators with 10⁻¹¹-level frequency stability via dual-mode temperature compensation
… Building on this platform, we evaluate how temperature variations and electronics-induced phase drift fundamentally limit the achievable stability of MEMS-based clocks. The first architecture is a single-mode ovenized clock in which the resonator is mounted on a temperature-regulated copper …
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