EP0264033A1 - Machine de chantier ferroviaire - Google Patents

Machine de chantier ferroviaire Download PDF

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Publication number
EP0264033A1
EP0264033A1 EP87114388A EP87114388A EP0264033A1 EP 0264033 A1 EP0264033 A1 EP 0264033A1 EP 87114388 A EP87114388 A EP 87114388A EP 87114388 A EP87114388 A EP 87114388A EP 0264033 A1 EP0264033 A1 EP 0264033A1
Authority
EP
European Patent Office
Prior art keywords
photo
sensitive sensor
measurement
displacement
track
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.)
Ceased
Application number
EP87114388A
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German (de)
English (en)
French (fr)
Inventor
André Jaquet
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Dreco SA
Original Assignee
Dreco SA
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Dreco SA filed Critical Dreco SA
Publication of EP0264033A1 publication Critical patent/EP0264033A1/fr
Ceased legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
    • E01B35/00—Applications of measuring apparatus or devices for track-building purposes
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
    • E01B2203/00—Devices for working the railway-superstructure
    • E01B2203/16—Guiding or measuring means, e.g. for alignment, canting, stepwise propagation

Definitions

  • the present invention relates to a railway construction machine equipped with a device for measuring the geometry of the light beam track with a point source, such as a tamper-grader-straightener, a screener, a laying train or a monitoring vehicle.
  • a point source such as a tamper-grader-straightener, a screener, a laying train or a monitoring vehicle.
  • the measuring device comprises at least one three-point measuring base connected to its rolling chassis during the measuring and / or working journeys, and this measuring device comprises three spaced track sensors defining three probing points with a file of rails, three elements for defining a reference plane constituted by a light beam emitter, a mask with rectilinear edges for calibrating the light beam and a receiver with a differential photo-sensitive sensor associated in this order and each respectively to one of the three rail probes, the photo-sensitive sensor being able to detect at its level a defect in alignment of the centers of these three defining elements in a measurement plane perpendicular to the reference plane, and to deliver an electrical signal representative, in direction and magnitude, of this misalignment, a motor connected by a transmission to one of the three elements of defined tion to move its center in a direction transverse to the reference plane with respect to the probe point of the rail probe with which this definition element is associated, and a displacement sensor associated with the center of the definition element moved by the motor, capable
  • the electrical signal emitted by the photo-sensitive sensor of the receiver is used to control the tools for moving the track during operations for rectifying its position, both in the vertical leveling plane, as shown in this patent, and in the horizontal dressing plane.
  • the track moved by the displacement tools in the vicinity of the intermediate rail feeler causes the latter to move along with the defining element associated with it, in this case the light beam calibration mask. , until the electrical signal emitted by the photo-sensitive sensor of the receiver is canceled.
  • the extent of the measurement range capable of the photo-sensitive sensor of the receiver defines the maximum deflection of the line of palpated rails which can be detected and measured by means of the electrical signal emitted by this photo-sensitive sensor.
  • One solution which has been suggested consists in extending the measurement range capable of the photo-sensitive sensor of the receiver, either by aligning a plurality of small photo-sensitive cells of the all-or-nothing type on either side of the center of the receiver. , as on the machine described in US Pat. No. 3,270,690, either by aligning two very long cells of the proportional type in positions spaced apart on either side of the center of the receiver, as in Swiss patent 643619.
  • the increase and the precision of the extent of the capable measurement range are limited by the reliability of the system which is all the less good the greater the number of aligned cells, and by the relatively large dimension of the measurement increment constituted by each of the cells.
  • the extent of the capable measurement range is still less than the full measurement scale desirable to satisfy the measurement of the arrows of all the conformations of usual route, due to the still insufficient sizing of the longest photo-sensitive cells available on the market.
  • a fixed reference base with a light beam is established next to a section of track at measure between two fixed definition elements, and a lorry equipped with a third definition element constituted by a differential photo-sensitive sensor travels this section of track between the two definition elements of the reference base to measure the arrows.
  • the lorry constitutes a rail feeler by its wheels and carries at the end of a retractable lateral arm the receiver with photo-sensitive sensor.
  • the receiver is mounted on the arm by means of a movement mechanism transverse to the track, motorized and controlled by the electrical signals emitted by the photo-sensitive sensor, to keep the center of the latter in alignment with the light beam reference base during the movement of the lorry between the two fixed elements defining this reference base.
  • a displacement sensor associated with the movable element of the displacement mechanism on which the photo-sensitive sensor is fixed, delivers an electrical signal representative of the displacement of the center of this photo-sensitive sensor relative to to the probing wheels of the lorry. Therefore, this electrical signal is also representative of the effective deflection of the track palpated at the lorry and used as such for determining the measurement of this effective deflection.
  • the extent of the measurement range capable of this device is no longer limited here by the dimensioning of the photo-sensitive sensor used, of whatever nature, because it is its displacement receipted by the sensor. displacement which is taken into account for the measurement of the deflections of the track.
  • the advantage of this device is limited by the fact that the measurement is stable during the journey of the lorry only if the photo-sensitive sensor is constantly kept centered on the light beam by the motorized movement mechanism slaved to its signal. This condition is practically impossible to satisfy in a tracking system of this kind due to the inertia of the movable members of the movement mechanism of the photo-sensitive sensor.
  • the object of the invention is to give the light beam measuring device of railway construction machines defined at the beginning of the description a measuring range of sufficient range to allow the precise and reliable measurement of the effective deflections of the track in all of its usual configurations and which is capable at the same time of supporting, without disadvantages for the precision and the reliability of the measurements made, a measurement path speed significantly greater than the speed limit for using a tracking system of the kind described above.
  • the railway construction machine is characterized in that it comprises a circuit for controlling the movement of the definition element moved by the motor, connected to the latter and to the photo-sensitive sensor, and slaved to the electrical signal delivered by this photo-sensitive sensor to keep the center of this definition element in alignment with the centers of the other two definition elements, and a summing circuit connected to the displacement sensor and to the photo-sensitive sensor, suitable to deliver an electrical summation signal proportional to the algebraic sum of the value of the displacement of the center of the definition element displaced relative to the probe point of the rail probe with which this element is associated, represented by the electrical signal delivered by the displacement sensor, and of the value of the residual defect in alignment of the center of the photo-sensitive sensor with the centers of the two other defining elements, represented by the s electrical signal delivered by the latter, this summing signal being used for the determination of the measurement of the deflection of the curvature of the track of feeler track, in the measurement plane, at the level of the intermediate track finder.
  • the instantaneous value represented by the summation signal thus produced and delivered is always a direct and precise function of that of the rail deflection detected by the measurement device at any time of the measurement path. And this regardless of the delay in the tracking movement of the definition element moved by the engine to keep its center in alignment with the centers of the two other defining elements, as long as the magnitude of the residual centering difference of the photo-sensitive sensor originating from this tracking delay does not exceed the sensitivity range of the latter.
  • the center of the definition element moved by the motor consists of that of the photo-sensitive sensor of the receiver, the latter being provided in the form a box installed in a fixed position on the rail probe with which it is associated and in which box are mounted at least and in addition to the photo-sensitive sensor, the motor and its transmission to move it and the displacement sensor to produce the electrical signal representative of its displacement.
  • the railway construction machine shown in FIG. 1 is a tamper-grader-straightener whose bridged chassis 1 has between its two axles 2 and 3 a tamping unit 4 per row of rails 5 and a displacement unit 6 of the track equipped with rail clamps 7 and hydraulic cylinders 8 for lifting and lateral shifting of the displacement unit 6, of which only a lifting cylinder is visible here.
  • This machine is equipped with a device for measuring the geometry of the light beam track 14 and 14 ⁇ comprising a base for measuring the leveling influenced by the light beam 14 and a base for measuring the training influenced by the light beam 14 ⁇ .
  • These two measurement bases are associated with three track feelers 9, 10 and 11 spaced apart in the longitudinal direction of the track and placed in rolling bearing thereon by means of support and guide rollers 12 defining three points of probing A, B and C on each of the two rows of rails.
  • support and guide rollers 12 defining three points of probing A, B and C on each of the two rows of rails.
  • Each of the two measurement bases includes three elements for defining a reference plane P, shown in FIG. 2 for leveling, constituted by an emitter 13, 13 ⁇ of the light beam, a mask 15, 15 ⁇ , detailed in FIG. 2, here with a slit. rectangular 16 whose edges calibrate the light beam, and a receiver 17, 17 ⁇ with differential photo-sensitive sensor 18, detailed also in FIG. 2, these three elements being associated in this order and respectively with the rail probes 9, 10, 11.
  • the three rail feelers 9, 10 and 11 are linked to the machine and driven by it in its working and measuring movements in the lowered position of contact with the two rows of rails of the track, by means of supports 19 provided for give them a free vertical and transverse movement to the track, limited but sufficient to allow them to follow by their rollers 12 the unevenness, the curvatures and the lefts of the track, independently of the chassis 1.
  • the transmitter 13, 13 ⁇ , the mask 15, 15 ⁇ and the receiver 17, 17 ⁇ of each measurement base are rigidly connected and at fixed positions to the rail feelers 9, 10 and 11 with which they are associated, their centers at equal distances respective probing points A, B and C, both for leveling and for dressing.
  • the defining elements of the two measurement bases are arranged and oriented in the same way with respect to the reference plane P defined for each of them by the point concern 0 and the emitter and the axis of symmetry X of the slot 16 mask 15; this is why only the leveling base is detailed in figure 2, in conjunction with a functional diagram of its electrical measurement circuit which is also identical for the two measurement bases.
  • the differential photo-sensitive sensor 18 of the receiver 17 is here constituted by the juxtaposition of two identical photovoltaic cells 20 and 21 and of the same characteristics, installed in differential and symmetrically with respect to a Y axis parallel to the X axis of symmetry of the slot 16 of the mask 15.
  • the receiver 17 is designed in the form of a housing in which the photo-sensitive sensor 18 is mounted displaceable by translation in the direction of the measurement plane, here FIG. 2 in the vertical direction of the leveling measurement plane.
  • the displacement of the photo-sensitive sensor 18 is obtained by means of an electric motor 22 driving in rotation a screw 23 on which is mounted in the manner of a nut a support 24 to which the two photo-sensitive cells 20 are fixed and 21.
  • the support 24 is also guided by a slide 25 parallel to the screw 23 is fixed by its two ends to two parallel flanges 26 and 27 limiting the displacement travel of the photo-sensitive sensor 18.
  • the screw 23 drives the mobile element of a rotary displacement sensor 28 capable of delivering an electrical signal representative, in direction and in magnitude, of the displacement of the photo-sensitive sensor 18 inside the receiver 17 and which , ultimately is representative of the movements of this photo-sensitive sensor 18 relative to the probing point C of the probe 11 to which this receiver is fixed.
  • the summation signal S delivered by the summing circuit 32 is proportional to the algebraic sum of the instantaneous value of the displacement of the center of the definition element displaced relative to the probe point of the rail probe with which this element is associated, in this case the displacement of the center Y of the photo-sensitive sensor 18 relative to the probe point C of the probe 11 in the vertical direction of the leveling measurement plane, and of the instantaneous value of the residual defect in alignment of the center Y of the photo-sensitive sensor 18 with the centers of the two other defining elements, in this case the centers X and O of the screen 15 and of the transmitter 13 and in the same vertical direction of the leveling measurement plane. And this at any time during the duration of the measurement run.
  • this summation signal S is representative in direction and magnitude of a deviation f (S) detected at point C, between the line representative of the AC string underlying the arc radius R of the curvature of the track, and the extension of the straight line D joining the two other probing points A and B.
  • this deviation f (S) represented by the summation signal S is linked to the value of the arrow F of the track palpated at point B by the relation:
  • This summation signal S is therefore a direct function of the value of the deflection F of the track palpated at point B by the intermediate feeler 10, and can be used as such for determining the measurement of this deflection F, with all the advantages already reported relating to the precision, reliability and speed of the measurement paths that can be ensured with such a measurement device.
  • an input 33 for initialization of the shaping circuit 31 making it possible to order a command to search for the center of the light beam when the measuring equipment is switched on and which has the effect of rapidly moving the photo sensor -sensitive 18, using the motor 22 and over its entire capable stroke inside the housing of the receiver 17, until it detects the light beam and centers on it; an input 34 for shifting the summing circuit 32 making it possible to obtain a mono or bidirectional, symmetrical or asymmetrical output signal S, according to the subsequent processing needs of this signal Release.
  • the characters of the summation signal S delivered by the summing circuit 32 are not only advantageous for the measurement of the arrows of the track during the pre-auscultation or control course. These characteristics of precision, instant response reliability are also applicable with interest during the work of rectifying the position of the track.
  • FIG. 3 shows the line of rails 5 palpated at points A, B and C by the rollers 12 of the rail feelers 9, 10 and 11 with which, according to the teaching already given for leveling, the three elements of definition of a reference plane P ⁇ , here vertical, constituted by the transmitter 13 ⁇ , the mask 15 ⁇ and the receiver 17 ⁇ .
  • the servo-valve 35 is connected to the output of an algebraic signal summator 36 with two inputs, one of which 37 is connected to the measurement circuit of the receiver 17 ⁇ to introduce the signal S, and the other of which 38 is connected to a guide setpoint signal summer 39.
  • the guide setpoints are also introduced into the summator 39 by a digital computer for connections and curves of the channel 40 with analog output, by an analog setting consignor 41 constituted by a potentiometer, and by a digital value recorder 42 with analog output, these three recorders 40, 41 and 42 being intended for the display of setpoint values of arrow F (fig. 4) to be obtained at point B by displacement of the track using the displacement device 6 depending on the desired geometry of the track.
  • the output signal from the algebraic summator 36 controls the servo-valve 35 to supply the hydraulic cylinder 8 in the direction of movement recorded until the summation signal S from the measurement circuit of the receiver 17, constituting here receipt of the displacement carried out, reaches the value of the displacement recorded, taking into account the aforementioned mathematical relation linking the value of the difference f (S) represented by this summation signal S to the value of the arrow F recorded.
  • three-point measurement bases can be connected or nested one inside the other to extend the range of the measurement in the longitudinal direction of the track, as is done with the known three-point measurement bases.
  • the two photo-sensitive cells 20 and 21 mounted in differential can be replaced without disadvantages by a single differential photo-sensitive cell.
  • the drive system of the photo-sensitive sensor 18 by the motor 22 can be different from the example screw-nut system, such as for example a rack or belt system.
  • the positions of the transmitter 13, 13 ⁇ and the receiver 17, 17 ⁇ relative to the mask 15, 15 ⁇ can be reversed, regardless of the direction of advance of the machine.
  • the association of a circuit for controlling the movement of the track such as that shown in FIG. 3 is not essential and may even be useless, for example when the machine equipped with the device
  • the measuring device which characterizes the invention is constituted by a rail car for controlling the geometry of the track.
  • the receiver box the electronics associated with the movement control circuit of the definition element moved by the motor as well as the electronics of the summing circuit, in addition to the photo-sensitive cells, of the motor. drive and its transmission, and the displacement sensor.
  • An assembly is thus obtained putting all the elements sensitive to the ambient conditions of railway sites (shocks, temperature, humidity, dust, etc.) in a single enclosure which can be made waterproof and deliver the measurement signal which can be used through a single connector and a single cable connecting to the processing unit.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Length Measuring Devices With Unspecified Measuring Means (AREA)
  • Length Measuring Devices By Optical Means (AREA)
  • Machines For Laying And Maintaining Railways (AREA)
EP87114388A 1986-10-08 1987-10-02 Machine de chantier ferroviaire Ceased EP0264033A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH401886A CH669416A5 (enrdf_load_stackoverflow) 1986-10-08 1986-10-08
CH4018/86 1986-10-08

Publications (1)

Publication Number Publication Date
EP0264033A1 true EP0264033A1 (fr) 1988-04-20

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP87114388A Ceased EP0264033A1 (fr) 1986-10-08 1987-10-02 Machine de chantier ferroviaire

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EP (1) EP0264033A1 (enrdf_load_stackoverflow)
CH (1) CH669416A5 (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2692607A1 (fr) * 1992-06-19 1993-12-24 Plasser Bahnbaumasch Franz Machine de construction de voie ferrée comprenant un système de référence à laser et procédé de guidage d'appareils en fonction dudit système.

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2042568A1 (de) * 1969-09-04 1971-03-18 Canron Ltd Canron Limitee Montreal, Quebec (Kanada) Gleisrichtmaschine
CH514031A (fr) * 1969-10-02 1971-10-15 Matisa Materiel Ind Sa Procédé de nivellement d'au moins une file de rails d'une voie ferrée et équipement pour sa mise en oeuvre
US3902426A (en) * 1972-02-07 1975-09-02 Plasser Bahnbaumasch Franz Method for lining track in a track curve
FR2404071A1 (fr) * 1977-09-23 1979-04-20 Canron Corp Appareil d'inspection de voies ferrees
CH643619A5 (fr) * 1981-09-25 1984-06-15 Sig Schweiz Industrieges Machine de chantier ferroviaire.

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2042568A1 (de) * 1969-09-04 1971-03-18 Canron Ltd Canron Limitee Montreal, Quebec (Kanada) Gleisrichtmaschine
CH514031A (fr) * 1969-10-02 1971-10-15 Matisa Materiel Ind Sa Procédé de nivellement d'au moins une file de rails d'une voie ferrée et équipement pour sa mise en oeuvre
US3902426A (en) * 1972-02-07 1975-09-02 Plasser Bahnbaumasch Franz Method for lining track in a track curve
FR2404071A1 (fr) * 1977-09-23 1979-04-20 Canron Corp Appareil d'inspection de voies ferrees
CH643619A5 (fr) * 1981-09-25 1984-06-15 Sig Schweiz Industrieges Machine de chantier ferroviaire.

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2692607A1 (fr) * 1992-06-19 1993-12-24 Plasser Bahnbaumasch Franz Machine de construction de voie ferrée comprenant un système de référence à laser et procédé de guidage d'appareils en fonction dudit système.

Also Published As

Publication number Publication date
CH669416A5 (enrdf_load_stackoverflow) 1989-03-15

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