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.
Results
Showing 1 to 16 of 16 for “"distributed temperature sensing"”.
-
High-Definition Raman-based Distributed Temperature Sensing
Distributed Temperature Sensing (DTS) has been used in a variety of different applications. Its ability to detect temperature fluctuations along fiber optic lines that stretch for several kilometers has made it a popular topic in various fields of science, engineering, and technology. From pre-fire …
-
Applications of Distributed Temperature Sensing in Subsurface Hydrology
… subsurface processes there is a need to monitor temperature and groundwater fluxes efficiently in both time and space. Distributed Temperature Sensing has recently become more accessible to researchers in Earth Sciences, and allows temperatures to be measured simultaneously, at small intervals, …
-
A fibre optic system for distributed temperature sensing based on raman scattering.
… is based on a research project to monitor the temperature profile along a power cable using the fibre optic Distributed Temperature Sensing (DTS) technology. Based on the temperature measured by a DTS system, real time condition monitoring of power cables can be achieved. In this thesis, there …
-
Numerical and graphical methods for estimation of water injection zonal allocation from distributed temperature sensing data
Includes bibliographical references (pages 115-117).
-
In situ temperature monitoring of the McMurdo Ice Shelf and ice shelf cavity by fiber-optic distributed temperature sensing
… two mooring containing fiber-optic cables for distributed temperature sensing (DTS) were installed at Windless Bight, Antarctica. Temperature was measured every meter along the deployed optical fibers over the 14 month test period via Raman backscatter DTS. Over 9 million temperature …
-
Sapphire Fiber-based Distributed High-temperature Sensing System
… harsh environments including high pressure, high temperature, highly electromagnetically-active and corrosive conditions. A typical example is fossil fuel-based power plants. Unfortunately, current optical fiber sensors for high-temperature monitoring can work only for single point measurement, as …
-
A Quasi-distributed Sensing Network Based on Wavelength-Scanning Time-division Multiplexed Fiber Bragg Gratings
… multiplexing (WSTDM) of 1000 ultra-weak FBGs for distributed temperature sensing. In comparison with the OFDR method, the WSTDM method distinguishes the sensors by different time delays, and its maximum operation distance, which is limited by the transmission loss of the fiber, can be as high as …
-
Monitoring the Transport of Microorganisms in Aquatic Environments Using Unmanned Surface Vehicles
… water and the atmosphere. Little is known about temperature profiles and biological transport across the boundary layers at the air-water interface, and how wind interactions at the AWI affects them. New technologies such as sensors and unmanned surface vehicles (USV) need to be developed and …
-
Multi-Material Fiber Fabrication and Applications in Distributed Sensing
Distributed sensing has been an attractive alternative to the traditional single-point sensing technology when measurement at multiple locations is required. Traditional distributed sensing methods based on silica optical fiber and electric coaxial cables have some limitations for specific …
-
Low Modal Volume Single Crystal Sapphire Optical Fiber
… SCSF. The improvements in spatial resolution for distributed sensing systems such as Raman distributed temperature sensing are also predicted based on the measured decrease in pulse duration. This research also provides an enhanced understanding of the etching behavior of sulfuric and phosphoric …
-
Hydrologic Characteristics of Summer Stream Temperatures in Little Creek and Scotts Creek at the Swanton Pacific Ranch
<p>Stream temperature impacts have resulted in increased restrictions on land management such as timber harvest and have created considerable uncertainty for future planning and management of redwood forestlands. Challenges remain in the assessment of downstream cumulative effects given the …
-
Fully Distributed Multi-parameter Sensors Based on Acoustic Fiber Bragg Gratings
A fully distributed multi-parameter acoustic sensing technology is proposed. Current fully distributed sensing techniques are exclusively based on intrinsic scatterings in optical fibers. They demonstrate long sensing span, but their limited applicable parameters (temperature and strain) and costly …
-
Exploitation of fibre characteristics in temperature sensing and radio-over-fibre applications
The development of sensing devices is one of the instrumentation fields that has grown rapidly in the last decade. Corresponding to the swift advance in the development of microelectronic sensors, optical fibre sensors are widely investigated because of their advantageous properties over the …
-
SPATIAL VARIABILITY OF THERMAL PROPERTIES IN RECLAMATION COVER SYSTEMS
… program and are increasing in area. Knowledge of temperatures and thermal properties in the cover system provide important information regarding the energy balance, thermal regime, as well as preliminary insight into soil water content. Cover system temperatures and thermal properties are measured …
-
Using Emerging Methods to Investigate Stream and Groundwater Interaction at Multiple Spatial Scales
… and develop predictive relationships. Water temperature has been used as a qualitative environmental tracer during the forging of this country from Lewis and Clarks pioneering spatial explorations to Thoreau's revolutionary scientific investigations; yet only very recent modeling and …
-
Investigations towards the development of a novel multimodal fibre optic sensor for oil and gas applications.
… earth, causing serious safety concerns. Hence, sensing of critical multiple parameters like high pressure, high temperature (HPHT), chemicals, etc., are required at longer distances. Traditional electrical sensors operate less effectively under these extreme environmental conditions and are …