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 45 for “"Leak Detection"”.
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Evaluating an experimental setup for pipe leak detection
… life piping system in which to test possible leak detection mechanisms. A model leak detection mechanism is developed which consists of a ring with threads that follow the streamlines of the flow inside the pipes, allowing for a visualization of the flow patterns. Two experiments were …
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Statistical approaches to leak detection for geological sequestration
… it into deep saline aquifers. Detecting leaks to the atmosphere will be important for ensuring safety and effectiveness of storage. However, a standard set of tools for monitoring does not yet exist. The basic problem for leak detection - and eventually for the inverse problem of …
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Liner characterisation and leak detection using electrical resistivity techniques
… with an increase in the proximity to the leak point. Furthermore, the resistivity values obtained with water were nearly 10 times the values observed with landfill leachate as the leaching liquid. Based on the resistivity profiles of soil as observed at different time intervals, the method …
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A reliable & autonomous robotic in-pipe leak detection system
Leaks are the major factor for unaccounted losses in every pipe network around the world (oil, gas or water). In most cases the deleterious effects associated with the occurrence of leaks may present serious economical and health problems. Therefore, leaks must be quickly detected, located and …
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The design of the housing for leak detection device
Small leaks in pipes cause huge losses of water, wasting the energy and money put into cleaning the water and pumping it to the point of the leak. Detecting these small leaks is currently not very accurate or practical to do over an entire system of pipes. A device is being developed which detects …
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Robot design for leak detection in water-pipe systems
Leaks are major problem that occur in the water pipelines all around the world. Several reports indicate loss of around 20 to 30 percent of water in the distribution of water through water pipe systems. Such loss of water represents critical waste of valuable resources, especially in countries such …
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Flexible in-pipe leak detection sensor module design and fabrication
… systems is evident. A robust autonomous in-pipe leak detection robot was developed and reported in [1-5]. The developed system is able to accurately detect leaks in both pressurized gas and water pipes. This however was limited to 101.6mm (4in) internal diameter pipes. In practice, fouling of …
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Smart water network management with in-pipe leak detection robots
… the WDN's pipes to better differentiate pipe leaks from bumps in the pipes. Starting from the unit of the in-pipe leak detection robot, I investigated ways to make its soft leak sensors able to differentiate between pulling (due to leaks) and bending (due to bumps), and showed how a new design …
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Further development of an in-pipe leak detection sensor's mobility platform
Water leakage is a major global problem and smaller sized leaks are difficult to find despite their prevalence in most water distribution systems. Previous attempts to develop a mobility platform for a sensor in use in such a pipe by the MIT Mechatronics lab have been met with less than desirable …
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Transpiration Electrokinetic Power Generation and Zinc Ion Battery for Autonomous Leak Detection
… lost in residential homes caused by undetected leaks creating nearly $20 billion in property damage annually in the U.S alone. These leaks also raise environmental concerns due to energy consumption in water treatment plants and declining freshwater sources. Additionally, water leaks can create …
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Adaptive swarm optimisation assisted surrogate model for pipeline leak detection and characterisation.
Pipelines are often subject to leakage due to ageing, corrosion and weld defects. It is difficult to avoid pipeline leakage as the sources of leaks are diverse. Various pipeline leakage detection methods, including fibre optic, pressure point analysis and numerical modelling, have been proposed …
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Leak detection in power plant heat recovery steam generators utilizing medical radionuclides
… turbine and boiler components, leading to steam leaks and premature failure. Established methods by which these leaks are detected rely on pressure drop testing: for power plants operating in today’s fast response market conditions a pressure drop test is not possible. The first evidence of a …
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Design and fabrication of a maneuverable robot for in-pipe leak detection
Leaks in pipelines have been causing a significant amount of financial losses and serious damages to the community and the environment. The recent development of in-pipe leak detection technologies at Massachusetts Institute of Technology made it possible to find the accurate location of leaks in …
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Design of an omnidirectional soft tactile sensor with applications in leak detection
… previous soft sensor designs are used to detect leaks in active water pipes, but have difficulty differentiating leaks from pipe joints and obstacles. This thesis presents the design, fabrication and experimental testing of soft, multi axis deformation sensors. In the first approach, various …
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Analysis and design of an in-pipe system for water leak detection
Leaks are a major factor for unaccounted water losses in almost every water distribution network. Pipeline leak may result, for example, from bad workmanship or from any destructive cause, due to sudden changes of pressure, corrosion, cracks, defects in pipes or lack of maintenance. The problem of …
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Real time water pipes leak detection using electromagnetic waves for the water industry
… the use of an electromagnetic sensor for the detection of leaks/cracks in water pipes. As old metal pipes corrode they start to become brittle, resulting in the potential for cracks to appear in the pipes. In addition corrosion can build up resulting in a restricted flow of water in the pipe. …
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Low-cost soft sensors and robots for leak detection in operating water pipes
… water produced in the world is lost due to pipe leaks. Due to limitations in available technologies, most of the leaks are either not found, or found too late. Every year, there are 240,000 water pipe breaks in the US, and many of them cause sinkholes and other severe damage to the …
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Design of soft-body robot with wireless communication for leak detection in large diameter pipe systems
Water leaks pose a major problem of efficiency and cost to municipalities and industries that cover significant area. While current commercial methods to address these problems do not provide convenient or low cost methods to detect leaks, a soft-body pipe leak detection robot has been developed to …
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