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 25 for “"Infrared sensors"”.
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INFRARED SENSORS USING SILICON MICROSTRUCTURES
… see in the dark has spurred the exploration of infrared imaging systems. There are basically two groups of detectors: photon detectors and thermal detectors. The high costs of cooling apparatus and infrared ( lR ) sensitive materials restrict the wide application of the photon detector as an IR …
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A preliminary assessment of the capability of GOES visible and infrared sensors in detecting rainfall in midlatitude cyclones
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Meteorology and Physical Oceanography, 1981.
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Sensor applications of carbon nanotubes
… Using this overview of carbon nanotube-based sensors, specific sensor technologies that could benefit from the use of newly developed techniques for producing aligned and ordered bundles of carbon nanotubes were selected. Reports of chemical/gas, biological, optical, mechanical, and a few …
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Microstructure, Tunable and Pyroelectric Properties of Laser-Ablated Ba (Zr0.25 Ti0.75) O3 Thin Films
Micro-devices such as tunable varactors and infrared sensors have been of great interest in many applications such as wireless communication and thermal imaging. Thin film capacitors made of ferroelectric materials have been widely studied for use as active elements in those devices due to their …
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Determination of Stability Conditions of a Pyrometer in a Continous Production
… the stability of pyrometers, non-contact infrared sensors, used in continuous production at BMW Group Debrecen. Inaccurate readings can lead to faulty products and increased waste. Through practical experiments and statistical analysis (including MSA and ANOVA), the study examined how …
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Scrape Behavior and Physical Characteristics of Scrapes and Rubs of White-Tailed Deer
… include direct observation and the use of remote infrared sensors which activated cameras by detecting a deer's presence. A total of 126 scrape behavior events were observed and over 300 pictures were taken by the infrared units. Earlier studies have indicated that does are not active participants …
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Motionless wide angle laser scanning for object detection and multi-spectral discrimination
… holds many advantages over conventional passive infrared sensors and active post-to-post laser sensors. Its key features are the ability to determine the intrusion size, speed and precise location. Nuisance and false alarm rates are also minimized since ignoring objects based on speed and size is …
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Impact of silicon nitride thickness on the infrared sensitivity of silicon nitride-aluminum microcantilevers
… silicon nitride - aluminum bimaterial cantilever infrared sensors. A model predicts cantilever behavior by considering heat transfer within and from the cantilever, cantilever optical properties, cantilever bending mechanics, and thermomechanical noise. Silicon nitride-aluminum bimaterial …
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Design and development of a positioning robot for use as a surgical debridement method
… mechanical structure of the robot, two different infrared sensors, the VCNL4000 Infrared Proximity sensor and the Sharp GP2YOA41SKOF Short Range Proximity Sensor were used and tested for their distance measuring capabilities. Both sensors were found unsuitable to accurately measure and detect a …
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Scalable 3D carbon nanotube structures for bolometric infrared sensor arrays
The infrared detector market has experienced steady growth over the last 10 years and is expected to reach hundreds of million dollars by 2025. The demand for more accurate, lower cost, and lower power consumption IR sensors is driven by emerging applications such as autonomous vehicles. Uncooled …
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NIR silicon photodetector enhancement using photonic crystal cavity resonators
The growing demand for efficient infrared sensors for light ranging, thermal-cameras, and soon, free-space optical communications has yet to be answered. In this study, we use polycrystalline silicon in conjunction with a photonic crystal cavity (PhCC) to enhance light absorption for efficient …
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Robotic Grasping of Fully-Occluded Objects using RF Perception
… by the line-of-sight perception of vision and infrared sensors, RF-Grasp employs RF (Radio Frequency) perception to identify and locate target objects through occlusions, and perform efficient exploration and complex manipulation tasks in non-line-of-sight settings. RF-Grasp relies on an …
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Vapor-liquid-solid (VLS) growth of lead chalcogenide thin films for infrared sensing applications
Infrared sensors are used in a variety of applications, from gas and moisture analysers, to human body detection to spectrophotometers. Available IR technology falls on two ends of the spectrum: state-of-art photon detectors are high-quality but expensive and cumbersome due to the need for …
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Understanding perception of different urban thermal model visualizations
… times. In comparison, modern UAVs equipped with infrared sensors allow very fine-scale (cm) data to be collected over smaller areas and can provide the means for a full 3D thermal reconstruction over limited spatial extents. Irrespective of the data collection method, the thermal properties of …
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Rapid Assessment of Quality Parameters in Processing Tomatoes using Handheld and Bench-top Infrared Spectrometers and Multivariate Analysis
Two portable infrared sensors were evaluated for the rapid determination of quality parameters in processing tomatoes. A total of 370 hot-break juices were prepared from ~40 processing tomato varieties grown in 5 California counties. The levels of sugars (glucose and fructose), acids (citric, …
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Vision-Enhanced Communications: On the Benefits of NLOS/LOS Knowledge in Wireless Systems
… with meteorological, auditory, optical, and infrared sensors has opened the door to integrating sensor-based information into existing physical layer communication system design. Many properties of the wireless channel, especially for mobile applications, are highly dynamic and easily …
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Dielectric Properties of Minerals and Ores and the Application of Microwaves for Assisted Comminution and Ore Sorting
… sorting, the heat signature is detected using infrared sensors to accept or reject valuable or gangue rock, respectively. A comprehensive literature review identified research gaps in the field of microwave-assisted comminution and ore sorting and found that developments have been limited by …
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Volcanology from space: applications of infrared remote sensing
… with the interpretation of multispectral infrared data of volcanic thermal features. Data from the two short wavelength infrared (SWIR) bands of the Landsat Thematic Mapper (TM) are used to constrain sizes and temperatures of subpixel resolution hot spots. Analysis of a 1989 TM scene of …
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Towards scalable modern marine ecosystem monitoring
… detection performance of surface-based thermal infrared sensors under realistic operational conditions, providing an evidence base for speed-restriction and real-time avoidance policies. Chapter 3 introduces ALERT, an automated IoT system integrating custom VHF signal processors with LoRaWAN to …
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Predicting user numbers of an urban fringe Pennine moorland using time and weather variables
… by Arduino micro-computers and passive infrared sensors. These sensors were designed and developed specifically for the purpose of remote high resolution counting of visitors at low cost, producing reliable 24/7 data for 15-months. Time and synchronous local weather variables at 30 …
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