EP3294607A1 - An on-vehicle system and method for collecting data related to the condition of a railway - Google Patents
An on-vehicle system and method for collecting data related to the condition of a railwayInfo
- Publication number
- EP3294607A1 EP3294607A1 EP16793089.0A EP16793089A EP3294607A1 EP 3294607 A1 EP3294607 A1 EP 3294607A1 EP 16793089 A EP16793089 A EP 16793089A EP 3294607 A1 EP3294607 A1 EP 3294607A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- railway
- rail
- vehicle
- actual value
- section
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 7
- 230000000284 resting effect Effects 0.000 claims abstract description 16
- 238000005259 measurement Methods 0.000 claims abstract description 14
- 239000003981 vehicle Substances 0.000 claims description 45
- 230000003137 locomotive effect Effects 0.000 claims description 21
- 239000002609 medium Substances 0.000 claims description 10
- 238000012423 maintenance Methods 0.000 description 12
- 230000011664 signaling Effects 0.000 description 10
- 238000011156 evaluation Methods 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 238000013439 planning Methods 0.000 description 4
- 239000002131 composite material Substances 0.000 description 3
- 230000001934 delay Effects 0.000 description 3
- 230000001154 acute effect Effects 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 229920002994 synthetic fiber Polymers 0.000 description 2
- 238000001514 detection method Methods 0.000 description 1
- 239000012777 electrically insulating material Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000010813 municipal solid waste Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 229920000136 polysorbate Polymers 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
- B61L1/00—Devices along the route controlled by interaction with the vehicle or train
- B61L1/02—Electric devices associated with track, e.g. rail contacts
- B61L1/04—Electric devices associated with track, e.g. rail contacts mechanically actuated by a part of the vehicle
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
- B61L1/00—Devices along the route controlled by interaction with the vehicle or train
- B61L1/18—Railway track circuits
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
- B61L1/00—Devices along the route controlled by interaction with the vehicle or train
- B61L1/20—Safety arrangements for preventing or indicating malfunction of the device, e.g. by leakage current, by lightning
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
- B61L15/00—Indicators provided on the vehicle or train for signalling purposes
- B61L15/0081—On-board diagnosis or maintenance
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
- B61L15/00—Indicators provided on the vehicle or train for signalling purposes
- B61L15/0092—Memory means reproducing during the running of the vehicle or vehicle train, e.g. smart cards
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
- B61L15/00—Indicators provided on the vehicle or train for signalling purposes
- B61L15/0094—Recorders on the vehicle
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
- B61L23/00—Control, warning or like safety means along the route or between vehicles or trains
- B61L23/04—Control, warning or like safety means along the route or between vehicles or trains for monitoring the mechanical state of the route
- B61L23/042—Track changes detection
- B61L23/044—Broken rails
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
- B61L23/00—Control, warning or like safety means along the route or between vehicles or trains
- B61L23/04—Control, warning or like safety means along the route or between vehicles or trains for monitoring the mechanical state of the route
- B61L23/042—Track changes detection
- B61L23/045—Rail wear
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
- B61L23/00—Control, warning or like safety means along the route or between vehicles or trains
- B61L23/04—Control, warning or like safety means along the route or between vehicles or trains for monitoring the mechanical state of the route
- B61L23/042—Track changes detection
- B61L23/047—Track or rail movements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
- B61L3/00—Devices along the route for controlling devices on the vehicle or train, e.g. to release brake or to operate a warning signal
- B61L3/02—Devices along the route for controlling devices on the vehicle or train, e.g. to release brake or to operate a warning signal at selected places along the route, e.g. intermittent control simultaneous mechanical and electrical control
- B61L3/08—Devices along the route for controlling devices on the vehicle or train, e.g. to release brake or to operate a warning signal at selected places along the route, e.g. intermittent control simultaneous mechanical and electrical control controlling electrically
- B61L3/10—Devices along the route for controlling devices on the vehicle or train, e.g. to release brake or to operate a warning signal at selected places along the route, e.g. intermittent control simultaneous mechanical and electrical control controlling electrically using current passing between devices along the route and devices on the vehicle or train
Definitions
- the present invention relates to an on-vehicle system for collecting data to be used to evaluate the cond ition of at least one rail of a railway, the railway comprising a plurality of consecutive railway sections each comprising a first rail connected to a voltage potential and a second grounded rail, each said first rail being electrically isolated from its two adjacent rails of adjacent railway sections by an electrically insulating portion arranged at each end side of the respective first rail .
- the invention relates to such a system of any conceivable type, which may be arranged on any railway vehicle, for instance a railway maintenance veh icle, such as a driverless rail trolley, a manually driven rail trolley or a railway maintenance truck, but such a system arranged on a locomotive of a passenger train may be mentioned as a typical example without restricting the invention thereto.
- a railway maintenance veh icle such as a driverless rail trolley, a manually driven rail trolley or a railway maintenance truck, but such a system arranged on a locomotive of a passenger train may be mentioned as a typical example without restricting the invention thereto.
- Such a system is to be used to collect data to be used to evaluate the condition of the railway so as to enable detection of acute errors and planning of maintenance thereof and thereby preventing accidents and delays on the railway.
- a part of the signalling system of a railway usually comprises a plurality of consecutive railway sections each comprising a first rail connected to a voltage potential, such as 7V, and a second grounded rail.
- Each said first rail being electrically isolated from its two adjacent rails of adjacent railway sections by an electri- cally insulating portion in the form of a small piece of synthetic material, usually a composite, arranged at each end side of the respective first rail . It is common , but not necessary, that the first and second rails shift sides from one railway section to another, so that each electrically insulating portion electrically isolates a said first and a said second rail from each other.
- the object of the present invention is to provide an on-vehicle system for collecting data to be used to evaluate the condition of at least one rail of a railway, of the type defined in the introduction .
- This object is according to the invention obtained by providing such a system , which is characterized in that it comprises means configured to measure an actual value of at least one railway condition related parameter by an element configured to be brought in electric contact with a said first rail of a railway section adjacent to the railway section on which the veh icle is resting in electric contact, and to send data of the result of the measurement to a storage med ium, and a vehicle positioning system configured to determine and send data of the position of the vehicle during measuring of said actual value to a storage medium.
- a system enables measurements of an actual value of at least one railway condition related parameter in an efficient and cost-effective way.
- the means is configured to measure an actual value of a railway condition related parameter in the form of the electrical resistance of a said electrically insulating portion electrically isolating the first rail of the railway section electrically contacted by the element from a rail of the railway section on which the vehicle is resting in electric contact.
- An actual value of the electrical resistance of a said electrically insulating portion is very useful for evaluation of the condition of the railway in the area of that portion .
- the risk of signalling error due to conduction over th is electrically insulat- ing portion may be calculated , and in continuation be eliminated through maintenance of the insulating portion , if needed .
- the means is configured to measure an actual value of a railway condition related parameter in the form of the electric potential difference between the first rail of the railway section electrically contacted by the element and a reference point. The value of such an electric potential difference may by itself or in combination with other values measured give valuable information about the condition of the railway.
- the means comprises a further said element configured to be brought in electric contact with a said second rail of a railway section adjacent to the railway section on which the veh icle is resting in electric contact, and each said element is independently arranged in front of the first wheelset or after the last wheelset of the vehicle.
- a further said element enables collection of data related to the condition of both rails of a railway.
- both elements are arranged in front of the first wheelset or after the last wheelset of the veh icle, and the means is configured to measure an actual value of a railway cond ition related parameter in the form of the electric potential difference between the first and second rails of a railway section adjacent to the railway section on wh ich the ve- hide is resting in electric contact.
- the value of such an electric potential difference may by itself or in combination with other measured values give valuable information about the condition of the railway.
- the or each element is a contact strip or an idler wheel.
- the vehicle po- sitioning system is a Global Positioning System (GPS).
- GPS Global Positioning System
- a Global Positioning System is suitable to use as the vehicle positioning system, as eventual error indicating values may be connected to exact coord inates which simplifies the maintenance work on the railway.
- the storage medium is comprised in a computer arrangement located on the vehicle.
- the computer arrangement is configured to receive data of the measured actual value of the at least one railway condition related parameter, to determine whether the actual value is on an acceptable side of a predetermined threshold value for the respective parameter or not, and to transmit an alarm signal if the actual value is not on an acceptable side of the predetermined threshold value for the respective parameter.
- the system is arranged on a railway vehicle, preferably a locomotive or a train car.
- a railway vehicle preferably a locomotive or a train car.
- the system may be used to collect data related to the condition of the railway continuously when the train is moving . This enables evaluation of the condition of the railway on busy railway routes very frequently and without use of special measuring vehicles which implies an efficient and cost- effective way of evaluating the condition of the railway.
- the actual value of the at least one railway condition related parameter is measured at least 50, at least 100, at least 500, between 500 and 5000, preferably between 2000 and 4000, more preferred between 2500 and 3500 times per second when the veh icle is mov- ing .
- the system is configured to be used on a railway having said electrically insulating portions in the form of joints of synthetic material, preferably a composite comprising plastic.
- the computer arrangement is configured to receive data of the measured actual value of the at least one railway condition related parameter in the form of the electrical resistance of a said electrically insulat- ing portion separating at least the first rail of the railway section electrically contacted by the element and the railway section on which the vehicle is resting in electric contact, to determine whether an actual value is measured or not and/or whether the actual value is greater than a predetermined threshold value of 1000 ⁇ or not, and to transmit an alarm signal if an actual value is measured and/or if the actual value is less than the predetermined threshold value.
- the computer arrangement is configured to receive data of the measured actual value of the at least one railway condition related parameter in the form of the electric potential difference between the first rail of the railway section electrically contacted by a said element and a reference point and/or the electric potential d ifference between the first and second rails of a railway section adjacent to the railway section on which the vehicle is resting in electric contact, to determine whether the actual value is greater than a first and a second predetermined threshold value or not, and to transmit a first alarm signal if the actual value is smaller than the first pre- determined threshold value only and a second alarm signal if the actual value is less than the second predetermined threshold value, wherein the first and second predetermined threshold values are 0.99 and 0.60 times as big as the target value of the electric potential difference between the respective rails, respec- tively.
- the invention also relates to a method for collecting data to be used to evaluate the condition of at least one rail of a railway according to the independent method claim.
- FIG. 1 is a simplified partly sectional side-elevation view of the system according to an embod iment of the invention arranged on a locomotive, is an enlarged view of the system of Fig . 1 , showing a said element in electric contact with a rail of a railway section adjacent to the railway section on which the locomotive is resting in electric contact, and is a simplified partly sectional view from above of the system of Fig . 1 , showing both said elements in electric contact with a first and a second rail of a railway section adjacent to the railway section on which the locomotive is resting in electric contact, respectively.
- An on-vehicle system for collecting data to be used to evaluate the condition of at least one rail of a railway according to an embod iment of the invention is illustrated in the appended figures 1 - 3 and will hereinafter be described while at the same time making reference to all these figures.
- the system is arranged on a locomotive 1 configured to be driven on a railway 2 comprising a plurality of consecutive railway sections 3a-c, which usually have a length of a few hundred meters to a few kilometres.
- Each section comprises a first rail 4a-c connected to a voltage potential , hereinafter voltage rail, and a sec- ond grounded rail 5a-c, hereinafter ground rail.
- the voltage potential of the voltage rails is usually 7V DC , but may also be greater or smaller, such as for instance 1 .5-12V.
- Each voltage rail is electrically isolated from its two adjacent rails of adjacent railway sections by an electrically insulating portion 6 arranged at each end side of the respective voltage rail .
- Such an electrically insulating portion usually consists of a small piece of an electrically insulating composite having a width of 3-5 mm, but may also consist of any other type of electrically insulating material, or even be constituted by an air gap of a few millimetres between two respective rails.
- such insu lating portions 6 are arranged between each pair of consecutive rails 4a, 5b, 4c; 5a, 4b, 5c of all adjacent railway sections 3a-c of the railway 2. It is common that the voltage 4a-c and ground 5a-c rails shift sides from one railway section 3a-c to another, so that each electrically insulating portion 6 electrically isolates a said voltage and a said ground rail from each other.
- railways by which for instance the left rail of every railway section as seen in one direction of the railway constitutes the voltage rail and the right rail constitutes the ground rail are also used .
- the system comprises means configured to measure actual values of at least one railway cond ition related parameter by two elements in the form of idler wheels 7 configured to be brought in electric contact with a voltage rail 4b and a ground rail 5b, re- spectively, of a railway section 3b adjacent to the railway section 3a on which the locomotive 1 is resting in electric contact.
- the idler wheels 7 are galvanically isolated mounted on the underside of the body of the locomotive in front of the first wheelset 8 by a respective jointed arm 9 which ensures that the wheel is in elec- trie contact with the rail.
- Each jointed arm is provided with a damper 10 which reduces the stress in the respective arm caused by overrunning for instance particles on the rail.
- the elements may also be for instance contact strips and these may also be mounted after the last wheelset of the complete train , and may even be mounted one in the front of the train and one in the back. However, the elements may not be mounted between the first and last wheelset of a train or a railway veh icle, as the first wheelset 8 entering a railway section 3a shorting the rails 4a, 5a of that section , so that several important parameters become impossible to measure.
- a metal plate 1 1 is arranged in the wheel axle of the respective idler wheel 7 and connected to a computer arrangement 12 , here- inafter computer, on the locomotive by a cable 13.
- the computer comprises measurement cards which enable measurements of the actual values desired by the plate 1 1 and data of the measurements are then sent to the computer 12 through the cable 13 and stored in a storage medium 14 of the computer.
- the computer 12 further comprises a vehicle positioning system 15 in the form of a Global Positioning System (GPS) which is configured to determine and send data of the position of the locomotive 1 during measuring of each said actual value to the storage med ium 14, so that the computer may connect each measured value with the coord inates for the position where the value was measured .
- GPS Global Positioning System
- an actual value of a railway cond ition related parameter in the form of the electrical resistance of the electrically insulating portion 6 may be measured between the idler wheel 7 in electric contact with the voltage rail 4b and the front wheelset 8 of the locomotive 1 in electric contact with the ground rail 5a (see Fig . 3). If the insulating portion 6 is in a perfect condition no value of the resistance can be measured as the insulating portion is completely insulating the rails 5a, 4b from each other; there is an "open-loop" resistance in the insulating portion . If however a value is measured th is is an indication that something is wrong with the insulating portion . Th is may be caused by metal dust on the rail around the insulating portion , as one example, which means a risk of current or future conduction over the insulating portion and thereby signalling errors.
- an actual value of a railway condition related parameter in the form of the electric potential difference between the voltage rail 4b and a reference point may be measured , for instance be- tween the same idler wheel 7 and the bogie 16 of the locomotive.
- the bogie used as reference point is electrically connected to the computer 12 via a cable 1 7 (see Figs. 1 and 2).
- the reference point may be located at another location of the locomotive 1 and may have almost any predetermined voltage potential , although it is preferred that the reference point is grounded .
- This value of the electric potential difference may give information on the condition of the insulating portions 6 between the rails 5a and 4b, and 4b and 5c, respectively.
- a low electric potential value may mean that there is conduction over any of these insulating portions. However, it may also be caused by a fau lt in the power supply. In such a case, the data collected from measurements of the electrical resistance of both said insulating portions 6 together with the data of the measurement of the electric potential difference between said rails should be necessary to enable determination of the location of the fau lt.
- an actual value of a railway condition related parameter in the form of the electric potential difference between the voltage rail 4b and the ground rail 5b of the same railway section 3b may be measured between the two idler wheels 7 (see Fig . 3).
- This value offers even more possibilities of detecting errors by the railway 2 and may also be used to confirm assumptions made based on other measurement resu lts.
- the system is configured to collect data in this way continuously in short intervals, such as at least 50, at least 100, at least 500, between 500 and 5000, preferably between 2000 and 4000, more preferred between 2500 and 3500 times per second , when the locomotive 1 is moving .
- the frequency of the measurements may be adjusted according to for instance the veh icle on which the system is arranged , or specific railway structures.
- the computer 12 is configured to receive data of the measured actual values of the railway condition related parameters and for each value determine whether the actual value is on an acceptable side of a predetermined threshold value for the respective parameter or not.
- the computer is further configured to transmit an alarm signal if the actual value is not on the acceptable side of the predetermined threshold value for the respective parameter.
- the system according to the invention thereby provides an effective and cost-efficient way of evaluating the condition of a railway 2, as no specialized measure- ment veh icles are needed and most routes of a railway system may be evaluated many times a day, or even many times an hour, provided that all trains would be equipped with the system. If this could be done, the maintenance planning of a railway could be optimized , as it would be possible to continuously monitor slight faults and thereby calculate when these are expected to become a risk of a signalling error.
- the alarm system of the computer has several levels of alarm signals for each parameter based on the degree of the error detected .
- a first threshold value for the electric resistance of an insu lating portion 6 may be any value, i.e. if anything other than open-loop resistance is measured a first alarm signal is transmitted indicating a slight fau lt cond ition , which may be taken into account in the maintenance planning and fixed dur- ing the next maintenance work of the railway 2.
- a second threshold value may be for instance 1000 ⁇ and if a value lower than this threshold value is measured the second alarm signal is transmitted indicating an acute fault which have to be fixed as soon as possible.
- any actual value that is not equal to the target value for instance 7 V, triggers a first alarm signal
- an actual value measured being smaller than a threshold value of about 60 percent of the target value i.e. about 4-4.5 V, triggers a second alarm signal.
- the invention is of course not in any way restricted to the embodiment thereof described above, but many possibilities to modifications thereof will be apparent to a person with ord inary skill in the art without departing from the scope of the invention as defined in the appended claims.
- rail refers to a rail portion which together with another parallel rail portion constitutes a railway section , also called railway block, of the complete railway.
- a "target value" is in th is disclosure to be interpreted as the value of a respective parameter at a flawless installation .
- data is in this disclosure to be interpreted as to also include information .
- that the computer is configured to "receive data of the measured actual value” may also mean that the computer receives information that no actual value cou ld be measured .
- system comprises two elements by which actual values are measured in the example shown and described
- a system according to another embodiment of the invention could have only one such element in electric contact with both rails, or with one rail only.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Automation & Control Theory (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- General Health & Medical Sciences (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
- Train Traffic Observation, Control, And Security (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE1530063 | 2015-05-10 | ||
PCT/SE2016/050419 WO2016182497A1 (en) | 2015-05-10 | 2016-05-10 | An on-vehicle system and method for collecting data related to the condition of a railway |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3294607A1 true EP3294607A1 (en) | 2018-03-21 |
EP3294607A4 EP3294607A4 (en) | 2019-01-02 |
Family
ID=57249301
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP16793089.0A Pending EP3294607A4 (en) | 2015-05-10 | 2016-05-10 | An on-vehicle system and method for collecting data related to the condition of a railway |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP3294607A4 (en) |
WO (1) | WO2016182497A1 (en) |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4087786B2 (en) * | 2003-12-19 | 2008-05-21 | 株式会社日立製作所 | Train position detection method |
US7823841B2 (en) * | 2007-06-01 | 2010-11-02 | General Electric Company | System and method for broken rail and train detection |
US9481384B2 (en) * | 2012-11-21 | 2016-11-01 | General Electric Company | Route examining system and method |
US9162691B2 (en) * | 2012-04-27 | 2015-10-20 | Transportation Technology Center, Inc. | System and method for detecting broken rail and occupied track from a railway vehicle |
US9102341B2 (en) * | 2012-06-15 | 2015-08-11 | Transportation Technology Center, Inc. | Method for detecting the extent of clear, intact track near a railway vehicle |
-
2016
- 2016-05-10 WO PCT/SE2016/050419 patent/WO2016182497A1/en unknown
- 2016-05-10 EP EP16793089.0A patent/EP3294607A4/en active Pending
Also Published As
Publication number | Publication date |
---|---|
EP3294607A4 (en) | 2019-01-02 |
WO2016182497A1 (en) | 2016-11-17 |
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