Researchers are developing an on-board system for trains that can identify low adhesion hazards such as ‘leaves on the line’ as well as other issues that cause the rail equivalent of black ice.
Low adhesion is caused by the contamination of railways lines by biological, chemical and physical factors, some of which cannot be easily monitored or controlled. The estimated overall cost of low adhesion to the UK railway industry is estimated at £350 million each year (RSSB).A minimum level of adhesion is essential for reliable braking and traction performance, especially for maintaining safety and limiting delays. Changes in adhesion can be very localized, unpredictable and transient, and poor adhesion experienced by one train may not affect following trains at the same location.
Now, engineers from Loughborough University, the University of Sheffield and engineering firm Perpetuum have partnered to develop a new product that will detect low adhesion hot spots in real-time and create an up-to-date map of the UK’s network which shows where any hazards might be.
The map will allow network operators to react quickly to potential risks allowing services to run more safely and smoothly.
Loughborough’s Dr. Chris Ward, who is leading the initiative, said: “The network is in danger of low adhesion events occurring at all times and the industry takes the impact of these incredibly seriously.
“Network Rail and the wider rail industry invests huge amounts of money in rail head cleaning, controlling flora alongside lines and forecasting where low adhesion events may occur—but it’s not an exact science and affected areas may only be discovered after an incident has taken place.
“The areas of low adhesion can often be short-lived and various types of train can react differently to the conditions.
“This new technology, by detecting low adhesion in real-time from in-service vehicles, will allow for a much more accurate picture of where hazards lie on the UK’s huge network of track, which will mean a quicker response—such as defensive driving or railhead treatment—and as a result a safer network with fewer delays.”
The detection system will use established sensing methods to collect data that will then be processed using algorithms created by Dr. Ward and colleagues at Loughborough.
The experimental software should pick up small changes in how the wheels of a carriage respond to different track conditions.
As a train passes over areas of low adhesion, the vehicle moves differently compared to running over tracks with high levels of adhesion.
Signals of the movements are picked up by sensors, that are then processed and turned into an assessment of adhesion level. If required, a warning could be sent to the driver or the wider network users.
Elaine Cockroft, Project Manager at Network Rail stated: “The aim is to develop a first of type product addressing the issue of low adhesion on the wheel/rail interface and consider a tribometer/measurement tool capable of determining the co-efficiency of friction on the rail head.
“The medium-term aspiration is to install a device on the Network Rail Head Treatment Train (RHTT) or a Multi-Purpose Vehicle (MPV), or any other suitable vehicle to capture intelligent seasonal treatment data at a minimum speed of 60mph and to demonstrate the effectiveness of the rail head treatment.
“The future ambition is to add the technology to passenger trains or freight locomotives and so the technology would need to be developed to capture continuous data at a traveling speed of 125mph across the network. This would feed into an up-to-date adhesion map of the network.”
The 22-month study will see the research team, conduct a major test program at Network Rail’s, Rail Innovation and Development Centre, in Tuxford, Nottinghamshire, to test their algorithms, this summer.
Artificial low adhesion will be created for the testing program and measured using state-of-the-art friction measurement equipment from the University of Sheffield.
Professor David Fletcher from Sheffield said: “Our collaboration in the UK Rail Research Innovation Network has enabled us to develop a comprehensive suite of rail surface analysis hardware. We can now take our rail-wheel contact expertise from the lab and deploy it to site trials such as these with Loughborough.”
“Like any vehicle that rolls on wheels, railway vehicles rely on friction being created in the wheel/rail contact area for guidance and traction—for example, steering, braking and accelerating,” said Dr. Ward.
“Rail systems have a specifically stiff and low friction contact area of steel wheels on steel rails.
“This is very efficient when it comes to energy loss during rolling and means that less energy is needed to maintain vehicle speeds compare to vehicles with tires.
“This is due to very little contact area deformation—they are fingernail-sized—even with the huge contact pressures.
“Low adhesion in this contact occurs for a variety of reasons, but one of the most widely known is ‘leaves on the line.”
“The chemistry of the leaves, rain and the huge pressures create a material that is akin to “Teflon’ or black ice—very nearly zero friction.
“So, when brakes are applied vehicles can just slide. A recent example was a vehicle traveling at 100kmh (60mph) was expected to stop in 1km. Due to low adhesion, it took 5km.
“This means red signals can be passed, station stops missed, and collisions can occur.
“The main issue is that we don’t know with confidence that these conditions have occurred. There is no real-time measurement at present. This is the key point we are aiming to address with the technology and turn into a process that can be deployed on the live railway.”
Source: TechExplore
Привет,
Ребята!
Дочитайте наше сообщение до конца.
Казино Вулкан в Казахстане предоставляет возможность сыграть в игровые автоматы в режиме демо.
Welcome to the world of adult Dating loveawake.ru
Hello2. And Bye2.
санаторий авангард багрипш
гостиница арс саратов вытегра гостиница апарт отель федоров барнаул
www vs yalta ru минеральные источники башкортостана гостиница ольгино
сосновый бор санаторий барнаул старопименовский переулок 11
фреш хостел краснодар отель каменка ainos сочи
октябрьский сочи отели черного моря для отдыха с детьми ялта 24 официальный сайт
лучшие санатории анапы с лечением гостевой дом волна суздаль
головинка лазурный берег санаторий переславль залесский купить путевку на море 2021
rosa village провал в пятигорске время работы цена курорты в сочи все включено
бишофитные ванны польза мариэль крым
витязево константинополь курорт казань лечение остеохондроза в краснодаре
юпитер евпатория отель gold shark отели чебаркуль
хостел мумидол гостиница медлен смоленск
sunflower park hotel москва горный алтай санатории с лечением цены арон отель казань
гостевой дом золотое руно витязево отели в выборге с бассейном и шведским отдых в краснодарском
купить путевку в санаторий на море лучшие отели крыма с бассейном
гостиницы на море краснодарский край отдых в абхазии белые скалы гостиницы лабинска
гостиница на старом месте санаторий жемчужина моря геленджик гостиница грация самара
белорусский вокзал гостиница польза радоновых ванн для женщин
красная пахра купон отели в алуште с бассейном ток судак официальный сайт
гостиницы луховицы 4 сезона отель москва отели николаевка крым
сан пятигорье пятигорск официальный сайт сити сочи
отель полина отдых в лоо краснодарский край зеленая роща это какой район в уфе
санаторий кавказ в кисловодске официальный сайт санаторий надежда кабардинка официальный сайт газпром все включено ялта
банк туров минеральные воды дербент жилье у моря
санатории легочного профиля кстово ярославская область официальный сайт пансионат горизонт алушта
аквалоо лазаревское отдых в ближнем подмосковье ооо мцмир курорт увильды
отель голден тюлип роза хутор сочи европа самара
куда в крыму поехать на майские праздники вилла голубой залив крым официальный сайт отель у бочарова ручья сочи официальный сайт
гостиница динамо уфа хостел друзья санкт петербург цены курорт на алтае белокуриха цены
судак крым санатории и пансионаты цены 2021г в белоруссии санатории
морской алушта официальный электросон что это за процедура курорт севастополь
гостиницы белозерск санатории в подмосковье для отдыха с детьми гостиницы ижевск цены
отель в евпатория бассейн в адлере с морской водой
евпатория санаторий мечта мини отель на лебедева 10в санкт петербург лор в адлере платный
отдых в евпатории на берегу моря отдых в абхазии частный адлеркурорт фрегат
гостиничный комплекс аврора омск респект холл резорт и спа в крыму
гостиница рыбак южно сахалинск стоимость moscow holiday hotel мневники высота горы олимп в геленджике
гостиницы крыма психоневрологический пансионат отель птичка в москве
медицинский центр волна ресторан жемчужина сочи
brevis сочи сосновая роща абхазия фото отель чайковский
вилла елена ялта цены стоит ли ехать в ессентуки флагман листвянка
йодобромные ванны для чего отель делайт москва таганская
оленевка солнечная долина выборг спа отель с бассейном чайка заозерное
релакс анапа восточный крым города парк отель солнечный московская область цены
Hello. And Bye Bye Bye.
best food at all inclusive resorts cancun
cancun all inclusice
carribean hammocks
vacation package cancun
cancun top resorts
cancun all inclusive vacations
best beach resorts in cancun
cancun packages
best cancun deals
swim up room cancun
best hotel to stay in cancun
best resort cancun mexico
family friendly hotels in cancun
cancun mexico vacation spots
best hotels in cancun hotel zone
best cancun family resorts
safest resorts in mexico 2020
www cancun resorts
what is the most luxurious resort in cancun
most luxurious hotel in cancun
best casino in cancun
best adults only resorts in cancun mexico
holidays cancun
all inclusive vacations in cancun mexico for families
best hotels near cancun
all inclusive or not in cancun
tijuana all inclusive resorts
cancun all inclusive adults only vacation packages
cancun resorts with flights
hoteles cancun all inclusive
solo trip to cancun
top 10 adults only all inclusive resorts in cancun
cancun best hotels
family of 15
most popular all inclusive resorts in cancun
all inclusive adults only vacation packages cancun
cancun all invlusive
cancun resorts all inclusive deals
cancun new mexico
best in cancun
cheap hotels in cancun on the beach
all inclusive cancun packages cheapest
playa del carmen to cancun airport
best hotel in cancun mexico all inclusive
family all inclusive cancun