EP1344702B1 - Measuring vehicle for Railway - Google Patents
Measuring vehicle for Railway Download PDFInfo
- Publication number
- EP1344702B1 EP1344702B1 EP03075736A EP03075736A EP1344702B1 EP 1344702 B1 EP1344702 B1 EP 1344702B1 EP 03075736 A EP03075736 A EP 03075736A EP 03075736 A EP03075736 A EP 03075736A EP 1344702 B1 EP1344702 B1 EP 1344702B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- frame
- sigma
- railway
- measured
- parameters
- 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.)
- Expired - Lifetime
Links
- 238000005303 weighing Methods 0.000 claims description 7
- 239000000523 sample Substances 0.000 claims description 5
- 238000007689 inspection Methods 0.000 claims description 4
- 238000011179 visual inspection Methods 0.000 claims description 3
- 238000012423 maintenance Methods 0.000 abstract description 2
- 238000006073 displacement reaction Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 210000002105 tongue Anatomy 0.000 description 3
- 230000001419 dependent effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000000284 resting effect Effects 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61K—AUXILIARY EQUIPMENT SPECIALLY ADAPTED FOR RAILWAYS, NOT OTHERWISE PROVIDED FOR
- B61K9/00—Railway vehicle profile gauges; Detecting or indicating overheating of components; Apparatus on locomotives or cars to indicate bad track sections; General design of track recording vehicles
- B61K9/08—Measuring installations for surveying permanent way
Definitions
- the invention is concerned with a measuring vehicle to be used in the management of turnouts of a railway.
- US-A-5,094,004 is considered the closest prior art document. It discloses a measuring vehicle, to be manually advanced and to ride over a railway. It is provided with sensors to measure the gauge and cross level of the railway and to measure the linear distance that the vehicle moves with respect to the railway. For that the vehicle is provided with advancement measuring means, measure command means and a computer to which sensors, advancement measuring means and measure command means are connected, such that an operator can command the computer by acting on the measure command means to store the parameters detected by the sensors measuring the track at that particular moment in relation to the measured advancement of the vehicle from a reference point into the relevant data base of the computer memory.
- the vehicle is further provided with a T-frame in top view with at each of its three longitudinal ends a running wheel set to ride over the railway, a first set bearing on the one rail bar and two second sets bearing on the other rail bar.
- a running wheel set to ride over the railway
- a first set bearing on the one rail bar and two second sets bearing on the other rail bar.
- One of which wheel sets can be displaced crosswise with respect to the advancement direction against a reset force to actuate a gauge sensor at the T-frame.
- One of the wheel sets is provided with an encoder such that the covered distance along the railway can be measured on the basis of the revolutions of the running wheel.
- a bracket is mounted to the T-frame to manually push it forward.
- the object of the invention is to offer the possibility to determine in an objective manner, on the basis of inspections, the quality of a turnout of the railway, to optimise the management, a.o. in terms of availability, safety and comfort.
- This object is met by providing the vehicle known from US-A-5,094,004 with a curve compensation sensor located immediately opposite the first wheel set at the T-frame half way between the two second wheel sets, wherein the first wheel set and the curve compensation sensor are each provided with a probe which can pivot against a reset force around a during operation upward extending axis to actuate a gap width sensor, while also half way between the second wheel sets a distance sensor is provided at the T-frame with which the distance to the rail bar there below can be measured to determine the vertical irregularity thereof, and the T-frame carries an angle twist meter, with which the cant of the track can be measured.
- the vehicle allows to measure the following parameters of a turnout of a railway: gauge, cant, gap width, vertical and horizontal irregularity.
- a prefered embodiment is shown of a measuring implement according to the invention.
- a rigid, T-shaped frame of tube like section is shown, with at its three longitudinal ends wheel sets 1, 2, 3 (not shown in detail) with which the frame can be advanced over the track.
- wheel sets 1 en 2 rest on the one and the wheel set 3 on the opposite rail bar.
- Ech wheel set consists of a supporting wheel resting on the rail bar and a side guide, bearing against the inner side of the rail bar head (about 14 mm below its top side) to avoid unintended sideways displacements.
- the frame can be shped differently in top view, such as U- or H-shaped, wherein in both cases there can be four wheel sets 1, 2, 3.
- the wheel set 3 is in the direction (arrow A) crosswise to the longitudinal direction of the railway (arrow B) connected to the frame to be able to displace (which displacement is detected by a track width (gauge) sensor) en is urged towards one side (e.g. away from the wheel sets 1, 2) of the frame by spring pretension.
- This wheel set 3 contains furthermore a check rail probe 4, made of a platen 6, mounted to pivot around an axis 5 normal to the plane of the drawing, kept in the extreme position shown in the drawing by a spring and pivoed in the direction of the arrow C by a passing check rail (which is detected by a gap width sensor).
- a check rail probe 4 made of a platen 6, mounted to pivot around an axis 5 normal to the plane of the drawing, kept in the extreme position shown in the drawing by a spring and pivoed in the direction of the arrow C by a passing check rail (which is detected by a gap width sensor).
- side guide 7 corresponding to the wheel sets 1, 2, 3 and a check rail probe 4.
- the assembly of side guide 7 and check rail probe 4 is mounted to the frame to be displacable in the direction op the arrow A (which displacement is detected by a curve compensation sensor). This assembly is urged toward one side (e.g. away from the wheel set 3) of the frame by spring pretension.
- a distance measuring sensor 8 is in line with the wheel sets 1, 2 mounted to the frame at least substantially opposite the wheel set 3 and above the rail bar head during operation for measuring the vertical irregularity of the rail bar. Also a angle twist meter (not shown) is mounted to the frame, with which the cant of the track can be measured.
- One of the wheel sets 1, 2, 3 is provided with an encoder such that the advancement of the measuring implement can be measured on the basis of revolutions of the wheel.
- a push/pull rod (not shown) is mounted to the frame, with which an operator can advance the measuring implement along the railway.
- a panel is mounted to the pull/push rod with a logical unit with I/O (e.g. keyboard, display), connected to the several sensors as indicated above.
- I/O e.g. keyboard, display
- a battery (not shown) is mounted to the frame and provides the power source for the logical unit and all components connected thereto.
- the logical unit can gather in an automatic manner data in dependency from the covered distance along the railway about: gauge, cant, gap width, vertical and horizontal irregularity.
- these five parameters are each time stored in a database in its memory after a predetermined distance is covered.
- the software also offers the opportunity for the operator to automatically store these five parameters at a random position along the railway through the logical unit by convenient positioning the frame along the track and operating the I/O (e.g. pressing one or more keys). It can be useful if the operator also enters information about the nature at said random position (e.g. weld, frog, critical point) into said database through the logical unit, e.g. by pressing a programmed key.
- the individual damage image is determined by visual inspection and expressed in a damage ratio number (D), such as a damage p ⁇ rcentage. Furthermore a weighing factor (F) is predetermined for each object, e.g. varying between 0 and 10 or between 0% and 100%, such that L accounts for 10 or 100%, resp.
- D damage ratio number
- F weighing factor
- the thus calculated quality level can e.g. be compared with a predetermined target quality level, whereafter on the basis of said comparison a desicion is made, e.g. to carry out maintenance or replacement to one or more objects of the relevant railway to bring the railway at the desired quality level.
- the calculated quality level can e.g. also be used to make a statement about the expected availability of the railway.
- the annexed table shows an example of the calculation of the quality level Qv for a switch, for which seven objects are defined.
- the invention is also based on a measuring vehicle of which one or more of the features of claim 2 is lacking.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Machines For Laying And Maintaining Railways (AREA)
- Length Measuring Devices With Unspecified Measuring Means (AREA)
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
- Length Measuring Devices By Optical Means (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
- Train Traffic Observation, Control, And Security (AREA)
Abstract
Description
- The invention is concerned with a measuring vehicle to be used in the management of turnouts of a railway.
- For the purpose of management of a railway, knowledge is required about its quality. It is known that for determining said quality, objects of the railway are inspected on a regular basis.
-
US-A-5,094,004 is considered the closest prior art document. It discloses a measuring vehicle, to be manually advanced and to ride over a railway. It is provided with sensors to measure the gauge and cross level of the railway and to measure the linear distance that the vehicle moves with respect to the railway. For that the vehicle is provided with advancement measuring means, measure command means and a computer to which sensors, advancement measuring means and measure command means are connected, such that an operator can command the computer by acting on the measure command means to store the parameters detected by the sensors measuring the track at that particular moment in relation to the measured advancement of the vehicle from a reference point into the relevant data base of the computer memory. The vehicle is further provided with a T-frame in top view with at each of its three longitudinal ends a running wheel set to ride over the railway, a first set bearing on the one rail bar and two second sets bearing on the other rail bar. One of which wheel sets can be displaced crosswise with respect to the advancement direction against a reset force to actuate a gauge sensor at the T-frame. One of the wheel sets is provided with an encoder such that the covered distance along the railway can be measured on the basis of the revolutions of the running wheel. Also a bracket is mounted to the T-frame to manually push it forward. - The object of the invention is to offer the possibility to determine in an objective manner, on the basis of inspections, the quality of a turnout of the railway, to optimise the management, a.o. in terms of availability, safety and comfort.
- This object is met by providing the vehicle known from
US-A-5,094,004 with a curve compensation sensor located immediately opposite the first wheel set at the T-frame half way between the two second wheel sets, wherein the first wheel set and the curve compensation sensor are each provided with a probe which can pivot against a reset force around a during operation upward extending axis to actuate a gap width sensor, while also half way between the second wheel sets a distance sensor is provided at the T-frame with which the distance to the rail bar there below can be measured to determine the vertical irregularity thereof, and the T-frame carries an angle twist meter, with which the cant of the track can be measured. - In this manner the vehicle allows to measure the following parameters of a turnout of a railway: gauge, cant, gap width, vertical and horizontal irregularity.
- Therefor the invention is defined in the independent claim(s). The dependent claims relate to advantagous developments of the invention.
- In the enclosed drawing a prefered embodiment is shown of a measuring implement according to the invention. In bottom view a rigid, T-shaped frame of tube like section is shown, with at its three longitudinal ends wheel sets 1, 2, 3 (not shown in detail) with which the frame can be advanced over the track. In that connection the wheel sets 1 en 2 rest on the one and the wheel set 3 on the opposite rail bar. Ech wheel set consists of a supporting wheel resting on the rail bar and a side guide, bearing against the inner side of the rail bar head (about 14 mm below its top side) to avoid unintended sideways displacements. However, the frame can be shped differently in top view, such as U- or H-shaped, wherein in both cases there can be four wheel sets 1, 2, 3.
- The wheel set 3 is in the direction (arrow A) crosswise to the longitudinal direction of the railway (arrow B) connected to the frame to be able to displace (which displacement is detected by a track width (gauge) sensor) en is urged towards one side (e.g. away from the wheel sets 1, 2) of the frame by spring pretension.
- This wheel set 3 contains furthermore a check rail probe 4, made of a platen 6, mounted to pivot around an axis 5 normal to the plane of the drawing, kept in the extreme position shown in the drawing by a spring and pivoed in the direction of the arrow C by a passing check rail (which is detected by a gap width sensor).
- Between the wheel sets 1 and 2, at least substantially immediately opposite wheel set 3, there is a side guide 7 corresponding to the wheel sets 1, 2, 3 and a check rail probe 4. The assembly of side guide 7 and check rail probe 4 is mounted to the frame to be displacable in the direction op the arrow A (which displacement is detected by a curve compensation sensor). This assembly is urged toward one side (e.g. away from the wheel set 3) of the frame by spring pretension.
- A
distance measuring sensor 8 is in line with the wheel sets 1, 2 mounted to the frame at least substantially opposite the wheel set 3 and above the rail bar head during operation for measuring the vertical irregularity of the rail bar. Also a angle twist meter (not shown) is mounted to the frame, with which the cant of the track can be measured. One of the wheel sets 1, 2, 3 is provided with an encoder such that the advancement of the measuring implement can be measured on the basis of revolutions of the wheel. - A push/pull rod (not shown) is mounted to the frame, with which an operator can advance the measuring implement along the railway. A panel is mounted to the pull/push rod with a logical unit with I/O (e.g. keyboard, display), connected to the several sensors as indicated above. A battery (not shown) is mounted to the frame and provides the power source for the logical unit and all components connected thereto. Thus, the logical unit can gather in an automatic manner data in dependency from the covered distance along the railway about: gauge, cant, gap width, vertical and horizontal irregularity. Preferably these five parameters are each time stored in a database in its memory after a predetermined distance is covered. The software also offers the opportunity for the operator to automatically store these five parameters at a random position along the railway through the logical unit by convenient positioning the frame along the track and operating the I/O (e.g. pressing one or more keys). It can be useful if the operator also enters information about the nature at said random position (e.g. weld, frog, critical point) into said database through the logical unit, e.g. by pressing a programmed key.
- In connection with inspection of a switch it is prefered to measure the above five parameters for at least the following critical points: the points of the tongues; gap; heel; frog; check rail.
- From one or more of the above five parameters, quality numbers can be derived, which are at this moment: Q5 (combined quality of 5 parameters), Qcp (combined quality of the parameters at all predetermined critical (characteristic) points) and Qj (qualitative dynamic behaviour of the switch relative to a reference), which can be calculated as follows (as a rule, the Q-values are between 0 and 10, wherein 10 presents the highest quality level):
v=vertical irregularity; h=horizontal irregularity
Qg, Qc, Qt, Qv en Qh ("Qp") are each calculated as follows from the ratio of the number of measurements within tolerance (Nt) to the number of measurements (Nm):
S= standard deviation; g= gauge; t= twist;
v= vertical irregularity; h= horizontal irregularity; Rj=2*reference track (e.g. 5,6 at speed 140 km/h) - It will be appreciated that for calculating Q5 and Qcp the measured five parameters are related to the applied relevant tolerances. Qj is however independent from the applied tolerances, and provides an indication of the dynamic influence of the switch on a passing train.
-
- D =
- during inspection determined damage ratio number to object;
- F =
- weighing factor for object;
- L =
- constant (e.g. the maximum weighing factor);
- Qv =
- quality level.
- Of each of the objects, such as rail bars, ballast, switches, crossings, bridges, welds, from which the railway segment is made, the individual damage image is determined by visual inspection and expressed in a damage ratio number (D), such as a damage përcentage. Furthermore a weighing factor (F) is predetermined for each object, e.g. varying between 0 and 10 or between 0% and 100%, such that L accounts for 10 or 100%, resp. For each object the damage index (DI) can now be calculated from the formula:
-
-
- The thus calculated quality level can e.g. be compared with a predetermined target quality level, whereafter on the basis of said comparison a desicion is made, e.g. to carry out maintenance or replacement to one or more objects of the relevant railway to bring the railway at the desired quality level.
- The calculated quality level can e.g. also be used to make a statement about the expected availability of the railway.
- Particularly the in the calculation used weighing factor F, but possibly also other calculation parameters, have to be determined by trial and error. In that connection it is of importance to have an idea about the influence of a change of a parameter for an individual object to the result of the calculation of the complete railway segment. For the weighing factor F this influence per object (i) at both the damage level (W) as the quality level (Qv) can be calculated with the following formula:
- The annexed table shows an example of the calculation of the quality level Qv for a switch, for which seven objects are defined.
Table Object damage image
yes/nodamage
%Sweigh
Fdamage
index SITongue movement tongue left wear/flaws 10 4 0.4 surf.damage 20 1 0.2 tongue right wear/flaws 50 4 2 surf.damage 10 1 0.1 Frog point wear/flaws 20 8 1.6 surf.damage 2 0 Rail left wear/flaws 10 2 0.2 bars surf.damage 0.5 0 right wear/flaws 10 2 0.2 surf.damage 0.5 2 Mounting means damage 30 3 0.9 Switch beams damage 20 10 2 Ballast damage 40 7 2.8 Wells damage 10 5 0.5 Total 50 10.9 Total damage index sum SI 10.9 Total weighing factors sum F 50 Damage level W W=sumSI/sumF*100% 21.80% Quality level Q Q=100%-W 78.2% Quality number 7.8 - In stead of Q5 the combined quality of more or less parameters can be applied, to be calculated as follows:
Qi..j=(1-0, 1*Qpi)*(1-0, 1*Qp..)*(.).(.)*(1-0, 1*Qpj)*10, possibly to be replaced by: Qi..j=(0,1*Qpi)*(0,1*Qp..)*(.).(.)*(0,1*Qpj). - The invention is also based on a measuring vehicle of which one or more of the features of claim 2 is lacking.
Claims (2)
- Measuring vehicle, to be manually advanced and to ride over railway, provided with sensors to measure the following parameters of a turnout: gauge, cant, gap width, vertical and horizontal irregularity, wherein said measuring vehicle is provided with advancement measuring means, measure command means and a computer to which said sensors, advancement measuring means and measure command means are connected, such that an operator can command the computer by acting on the measure command means to store the parameters detected by the sensors in the turnout at that particular moment in relation to the measured advancement of the measuring vehicle from a reference point into the relevant data base of the computer memory, for which the measuring vehicle is provided with a T-frame in top view with at each of its three ends a running wheel set (1, 2, 3) to ride over the railway, a first set (3) bearing on the one rail and two second sets (1, 2) bearing on the other rail, of which one (3) can be displaced crosswise (A) with respect to the advancement direction (B) against a reset force to actuate a gauge sensor at the T-frame and located immediately opposite said first set (3) is provided a curve compensation sensor (7) at the T-frame half way between the two second wheel sets (1, 2), wherein the first wheel set (3) and the curve compensation sensor (7) are each provided with a probe (6) which can pivot against a reset force around a during operation upward extending axis (5) to actuate a gap width sensor, while also half way between the second wheel sets (1, 2) a distance sensor (8) is provided at the T-frame with which the distance to the rail there below can be measured to determine the vertical irregularity thereof, and the T-frame carries an angle twist meter, with which the cant of the track can be measured, while one of the wheel sets (1, 2, 3) is provided with an encoder such that the covered distance along the track can be measured on the basis of the revolutions of the running wheel, and also a bracket is mounted to the T-frame to manually push it forward.
- Vehicle according to claim 1, wherein it is designed such that data obtained from the data base of its computer are usable to calculate the quality numbers Q5, Qcp and Qj by using the following formulas:
et
the result of which is combined with one or more of the results of the following formulas:
der folgenden Formeln:
wherein: g=gauge; c=cant; t=twist;
v=vertical irregularity; h=horizontal irregularity; Npcp=number of parameters within tolerance for all critical points; Nmcp=number of measured parameters for all critical points; S=standard deviation; Rj=2*reference track; D=during inspection determined damage ratio number to object; F=weighing factor for object; L=constant; W=damage level; Q=quality level; Qv=quality level from visual inspection.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL1020168A NL1020168C2 (en) | 2001-03-14 | 2002-03-13 | Monitoring system for track points, uses measurement data from track to provide qualitative assessment of points and carry out maintenance work if necessary |
NL1020168 | 2002-03-13 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1344702A1 EP1344702A1 (en) | 2003-09-17 |
EP1344702B1 true EP1344702B1 (en) | 2009-05-20 |
Family
ID=27764674
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP03075736A Expired - Lifetime EP1344702B1 (en) | 2002-03-13 | 2003-03-13 | Measuring vehicle for Railway |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP1344702B1 (en) |
AT (1) | ATE431796T1 (en) |
DE (1) | DE60327676D1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102007016395B3 (en) * | 2007-04-03 | 2008-07-03 | Db Netz Ag | Vehicle-specific quantification function determining method for track, involves determining regression coefficients for vehicle reaction by satisfying preset vehicle-specific quantification equation |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3924461A (en) * | 1974-08-20 | 1975-12-09 | Harris A Stover | Monitoring system for detecting defective rails or road beds |
FR2674809B1 (en) * | 1991-04-08 | 1994-06-10 | Lorraine Laminage | DEVICE FOR CONTROLLING A RAILWAY TRACK. |
US5094004A (en) * | 1991-06-21 | 1992-03-10 | The United States Of America As Represented By The Secretary Of The Army | Railroad track gager/leveler/linear measurer |
IT1299784B1 (it) * | 1998-04-27 | 2000-04-04 | Azienda Trasporti Municipali M | Metodo ed apparato per rilevare le anomalie di armamenti ferroviari e tranviari |
-
2003
- 2003-03-13 AT AT03075736T patent/ATE431796T1/en not_active IP Right Cessation
- 2003-03-13 DE DE60327676T patent/DE60327676D1/en not_active Expired - Lifetime
- 2003-03-13 EP EP03075736A patent/EP1344702B1/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
ATE431796T1 (en) | 2009-06-15 |
DE60327676D1 (en) | 2009-07-02 |
EP1344702A1 (en) | 2003-09-17 |
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