The system invented at Sheffield tests pipes by transmitting a pressure wave along them that sends back a signal if it passes any unexpected features, such as a leak or a crack in the pipe's surface.
The pressure wave is generated by a valve fitted to an ordinary water hydrant, which is opened and closed rapidly. The wave sends back a reflection, or a signal, if it encounters any anomalous features in the pipe. The strength of that signal can then be analysed to determine the location and the size of the leak.
Originally created by a team led by Professor Stephen Beck in the University's Department of Mechanical Engineering, the invention was developed into a prototype device in partnership with colleagues in the Department of Civil and Structural Engineering, and UK water company, Yorkshire Water.
The device has now been trialled at Yorkshire Water's field operators training site in Bradford, UK and results show that it offers a reliable and accurate method of leak testing. Leaks in cast iron pipes were located accurately to within one metre, while leaks in plastic pipes were located even more precisely, to within 20cm. The results of the trial are published today (6 August 2012) in a paper entitled, 'On site leak location in a pipe network by cepstrum analysis of pressure transients', in the Journal - American Water Works Association.
Existing leak detection techniques rely on acoustic sensing with microphones commonly used to identify noise generated by pressurised water escaping from the pipe. This method, however, is time consuming and prone to errors: the use of plastic pipes, for example, means that the sound can fall away quickly, making detection very difficult.
In contrast the device invented by the Sheffield team uses a series of calculations based on the size of the pipe, the speed of the pressure wave, and the distance it has to travel. The device can be calibrated to get the most accurate results and all the data is analysed on site, delivering immediate results that can be prioritised for action.
Dr James Shucksmith, in the Department of Civil and Structural Engineering at the University of Sheffield, who led the trial, says: "We are very excited by the results we've achieved so far: we are able to identify the location of leaks much more accurately and rapidly than existing systems are able to, meaning water companies will be able to save both time and money in carrying out repairs.
"The system has delivered some very promising results at Yorkshire Water. We hope now to find an industrial partner to develop the device to the point where it can be manufactured commercially"
Dr Allyson Seth, Networks Analytics Manager at Yorkshire Water comments: "Driving down leakage on our 31,000km network of water pipes is a high priority for us.
"Over the last 12 months alone, we've targeted leakage reduction and as a result we're currently recording our lowest ever levels of leakage.
"But we want to do more, which is why, in addition to the existing technologies we use, we're looking at new ways to help us to reduce leakage.
"Our work with engineers at the University of Sheffield is the latest example of this, and we look forward to working with them going forward to build on what has been achieved so far."
Jo Kelly | EurekAlert!
Heating and cooling with environmental energy
22.09.2016 | FIZ Karlsruhe – Leibniz-Institut für Informationsinfrastruktur GmbH
Working comfortably in summer heat
02.06.2016 | FIZ Karlsruhe – Leibniz-Institut für Informationsinfrastruktur GmbH
The Fraunhofer Institute for Organic Electronics, Electron Beam and Plasma Technology FEP has been developing various applications for OLED microdisplays based on organic semiconductors. By integrating the capabilities of an image sensor directly into the microdisplay, eye movements can be recorded by the smart glasses and utilized for guidance and control functions, as one example. The new design will be debuted at Augmented World Expo Europe (AWE) in Berlin at Booth B25, October 18th – 19th.
“Augmented-reality” and “wearables” have become terms we encounter almost daily. Both can make daily life a little simpler and provide valuable assistance for...
With the help of artificial intelligence, chemists from the University of Basel in Switzerland have computed the characteristics of about two million crystals made up of four chemical elements. The researchers were able to identify 90 previously unknown thermodynamically stable crystals that can be regarded as new materials. They report on their findings in the scientific journal Physical Review Letters.
Elpasolite is a glassy, transparent, shiny and soft mineral with a cubic crystal structure. First discovered in El Paso County (Colorado, USA), it can also be...
For the first time, Fraunhofer IKTS shows additively manufactured hardmetal tools at WorldPM 2016 in Hamburg. Mechanical, chemical as well as a high heat resistance and extreme hardness are required from tools that are used in mechanical and automotive engineering or in plastics and building materials industry. Researchers at the Fraunhofer Institute for Ceramic Technologies and Systems IKTS in Dresden managed the production of complex hardmetal tools via 3D printing in a quality that are in no way inferior to conventionally produced high-performance tools.
Fraunhofer IKTS counts decades of proven expertise in the development of hardmetals. To date, reliable cutting, drilling, pressing and stamping tools made of...
At AKL’16, the International Laser Technology Congress held in May this year, interest in the topic of process control was greater than expected. Appropriately, the event was also used to launch the Industry Working Group for Process Control in Laser Material Processing. The group provides a forum for representatives from industry and research to initiate pre-competitive projects and discuss issues such as standards, potential cost savings and feasibility.
In the age of industry 4.0, laser technology is firmly established within manufacturing. A wide variety of laser techniques – from USP ablation and additive...
Every three years, the plastics industry gathers at K, the international trade fair for plastics and rubber in Düsseldorf. The Fraunhofer Institute for Laser Technology ILT will also be attending again and presenting many innovative technologies, such as for joining plastics and metals using ultrashort pulse lasers. From October 19 to 26, you can find the Fraunhofer ILT at the joint Fraunhofer booth SC01 in Hall 7.
K is the world’s largest trade fair for the plastics and rubber industry. As in previous years, the organizers are expecting 3,000 exhibitors and more than...
23.09.2016 | Event News
20.09.2016 | Event News
16.09.2016 | Event News
23.09.2016 | Life Sciences
23.09.2016 | Health and Medicine
23.09.2016 | Life Sciences