• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention relates to a system for measuring a track (3), which in the longitudinal direction (8) of the track (3) comprises two external measuring devices (9, 10) and an intermediate measuring device (13) arranged therebetween, each measuring device (9, 10, 13) relative to the track (3) has a certain position to detect geometric track parameters. In this case, the one outer measuring device (9) comprises a camera (12) with a receiving area (19), wherein in the receiving area (19) a measuring object (11) of the other outer measuring device (10) and a measuring object (14) of the middle measuring device (19). 13) are arranged and wherein the camera (12) is connected to an evaluation device (18) for pattern recognition. In this way, by means of a single camera (12) all position parameters of the track (3) are detected, which are necessary for a precise alignment and leveling of the track (3).
    公开号:AT518839A1
    申请号:T325/2016
    申请日:2016-07-11
    公开日:2018-01-15
    发明作者:
    申请人:Plasser & Theurer Exp Von Bahnbaumaschinen G M B H；
    IPC主号:
    专利说明:

    description
    System and method for measuring a track
    Technical Field The invention relates to a system for measuring a track, which comprises two outer measuring devices in the longitudinal direction of the track and an intermediate measuring device arranged therebetween, wherein each measuring device has a specific position relative to the track in order to detect geometric track parameters. In addition, the invention relates to a method for operating the system.
    PRIOR ART [02] A track measurement serves to detect track position errors and to carry out corrective measures in a targeted manner. A dedicated system determines geometric track parameters such as the position of the track in the horizontal and vertical directions and the relative altitude of the two rails of a track (cant, twist) to each other.
    [03] For tracks with ballast, straightening and leveling are the essential corrective measures for producing a desired track position. By means of a straightening system, the track is corrected in its horizontal position. Vertical position errors of the track or the rails are remedied by means of a leveling system.
    [0002] Track laying machines provided for this purpose include working units in order to bring the track into the required position and to support it. Subsequently, a dynamic track stabilization can be done by means of a dedicated vibration unit to ensure a sustainable location of the track in the ballast bed.
    [05] For straightening the track the so-called arrow height is used. As a reference base usually serves a measuring chord, which is stretched in the middle between the two outer measuring devices of the aforementioned system. A feeler of the middle measuring device scans the tendon thus formed, resulting in the arrow height at this point.
    [06] A simple height measurement of the two rails can be done via a tilt measurement of the respective measuring device, for example by arranging pendulum. However, such solutions are too inaccurate for precise track leveling.
    [07] Usually, a further measuring chord is arranged above each rail, the ends of which are coupled via linkages to the external measuring devices. Thus, the altitudes of the two outer measuring devices are transmitted to the respective measuring chord. At the middle measuring device a feeler is provided for each measuring chord. As with the tracked chord, there is the difficulty of avoiding a collision of the measuring chords with the working units.
    [08] Systems for track measurement without measuring chords are also known from the prior art. For example, a measuring device disclosed in AT 515 208 A4 uses a machine frame of a track construction machine as a reference. In addition, optical systems for track measurement have long been known, for example from US 3,107,168 A.
    Summary of the Invention [09] It is the object of the invention to provide an improvement over the prior art for a system and a method of the type mentioned in the introduction.
    [10] According to the invention this object is achieved by a system according to claim 1 and a method according to claim 10. Advantageous developments of the invention will become apparent from the dependent claims.
    In this case, the one outer measuring device comprises a camera with a receiving area, wherein in the receiving area a measuring object of the other outer measuring device and a measuring object of the central measuring device are arranged and wherein the camera is connected to an evaluation device for pattern recognition.
    [12] By means of pattern recognition, the measurement objects are detected and their position relative to one another and with respect to an image section of the camera determined. In this way, all position parameters of the track, which are necessary for precise alignment and leveling, are recorded by means of a single camera. Overall, only a few system components are required to perform the track position measurement. In addition, track parameters such as arrow height, longitudinal height of the respective rail, torsion and rail spacing can be detected redundantly.
    A simple embodiment of the invention provides that the measurement object of the other external measuring device is designed as a light source and that the measuring object of the central measuring device is designed as a shading object which shadows a part of the light source relative to the camera. Such devices are simple and robust components that are resistant to vibration and dust. The Äbschattungsobjekt may be a simple component of the middle measuring device, which stands out against the light source as a characteristic silhouette.
    [14] In another embodiment, it is advantageous if both measuring objects are designed as shading objects, each of which shadows a part of a light source relative to the camera. In this case, each measurement object has a characteristic shape that can be reliably detected by means of pattern recognition. The light source serves as a planar backlight.
    A development of the invention provides that in the receiving area of the camera, another measurement object is arranged. In order for a so-called four-point measurement is realized by means of the sinking of the track are easily detected. With a large number of measuring objects, additional position data of the track can be determined. One of the measurement objects can be designed as a light source, which is partially shaded by the other measurement objects relative to the camera.
    [16] As a useful supplement, at least one measurement object has self-luminous elements. This measure allows easier and faster evaluation by means of pattern recognition under difficult environmental conditions. For example, two images of the measurement object are taken immediately after one another, wherein the illumination is activated only for one recording. Then the measurement object is immediately recognizable in this image.
    [17] Furthermore, it is advantageous if at least one measuring object or the camera is designed to be displaceable and / or pivotable on a holder of the associated measuring device. This ensures, on the one hand, that both measuring objects remain within the receiving range of the camera, even in narrow radii of the track course. On the other hand, a tracking of the camera or the measurement objects is possible so that the camera and the measurement objects remain on a common axis when cornering.
    For a simple construction of the system, it makes sense if the measurement objects and the camera are each arranged on a track-mounted measuring carriage. The respective measuring carriage is pressed against a rail, whereby a clear position of the measuring carriage is given to the track. Thus, the position of the track at the respective position of the trolley is determined by its location.
    [19] In an advantageous embodiment, it is provided that the system comprises a track-laying machine on which the measuring devices are arranged. It is only necessary to ensure that there is visual contact between the camera and the test objects. Even if this is briefly interrupted by a working aggregate, the functionality of the system remains. Otherwise it would behave in the prior art in a collision with a measuring chord.
    It is favorable if the track construction machine is designed as a track tamping machine and if a measurement object for detecting a track correction in the region of a tamping unit is arranged. The camera is located on an external measuring device and thus away from the working units (tamping unit, lifting-straightening unit) of the tamping machine. The middle measuring object in the area of the working aggregates can be executed as a simple shading object and thus insensitive to shocks and dust. Therefore, the middle object to be measured can also be arranged directly at the tamping unit, where the track position fixed by submerging is to be measured.
    In a development of this system embodiment, at least one measuring device is assigned a position measuring system by means of which the position relative to the track can be determined. The measuring device is thus contactless with respect to the track executable. The evaluation of the camera recordings gives the position of the measuring devices to one another and the evaluation of the position measuring system results in the location of the measuring device equipped with respect to the rails. Coordinate transformation calculates the track parameters to be determined from this.
    [22] In the method according to the invention for operating a said system, it is provided that the system is moved along the track and that the changes in position of the measuring objects are determined by an evaluation of the recordings of the measured objects recorded by means of a camera.
    [23] The evaluation of the recorded measurement objects takes place by means of pattern recognition, wherein the position of the detected measurement objects is determined in each recording. The various positional parameters of the track are calculated using the known geometric relationships between the measuring devices.
    An advantageous development of the method is given if the system is given a characteristic vibration frequency and if the camera is given a frame rate that is at least twice as high as the characteristic vibration frequency. When operating a track-laying machine, such characteristic vibration frequencies occur, resulting in system vibrations. In an image sequence with a correspondingly high frame rate, such disturbances can be eliminated in a simple manner by calculation. Specifically, the system vibrations are recorded and eliminated.
    Advantageously, it is provided that at least one measurement object or the camera is displaced and / or pivoted when cornering. For such tracking a drive of the corresponding measuring device is controlled depending on a curve radius of the track occurring. By way of example, the two measuring objects and the camera are aligned with one another along a common axis in order to determine the track positions at the measuring points on the basis of the required lateral displacements.
    [26] Alternatively or in addition to this, it may be useful if a pattern attached to a measurement object whose image changes in a characteristic manner when the pattern changes is recorded by means of the camera. In curves then no lateral tracking is required because a shift of the respective measurement object is determined by the changing recording of the pattern.
    An advantageous development of the method provides that a working aggregate of a track-laying machine is controlled as a function of the detected position of a test object. For example, in the case of a tamping machine, the track position is determined by means of a shading object in the immediate vicinity of the tamping unit. Depending on this and in the ongoing comparison with a desired target track position, the control of the lifting-straightening aggregate of the track tamping machine takes place.
    [28] In addition, it is advantageous if at least the position of a test object or the camera relative to the track is detected without contact by means of a position measuring system. This eliminates wear-prone mechanical components such as wheels of measuring carriages. Even simple optical position measuring systems such as laser line scanners are suitable for determining the position of the respective measuring device relative to the rails with sufficient accuracy.
    Brief Description of the Drawings [29] The invention will now be described by way of example with reference to the accompanying drawings. In a schematic representation:
    Fig. 1 track construction machine in a side view
    Fig. 2 measuring devices in a curve in a plan view
    Fig. 3 arrangement with measuring carriage in a cornering
    Fig. 4 recording of the measurement objects
    Fig. 5 recording with changes in position of the measurement objects
    Fig. 6 Mean measuring device
    FIG. 7 Recording of the measurement objects with a position-dependent pattern FIG. 8 Recording with a change in position of the measurement objects with a position-dependent pattern
    FIG. 9 Pattern recognition of a position-dependent pattern FIG. 10 Position-dependent pattern with detected position change FIG. 11 Recording of two shading objects in front of a light source FIG. 12 Recording with position changes of the shading objects
    DESCRIPTION OF EMBODIMENTS [30] The track construction machine 1 in FIG. 1 is designed as a track tamping machine and can be moved on rails 2 of a track 3. A machine frame 4 of the track-laying machine 1 is supported on trolleys 5 and carries tamping units 6 and a lifting-straightening unit 7 as working units. Other track construction machines such as cleaning machines or dynamic track stabilizers are suitable for the system according to the invention.
    [31] In the longitudinal direction 8 of the track 3, two external measuring devices 9 and 10 are arranged on the track construction machine 1. The front measuring device 10, seen in the working direction, comprises as measuring object 11 a planar light source. The luminous surface of this light source faces a camera 12, which is attached to the rear measuring device 9.
    [32] Between the two outer measuring devices 9, 10, a mean measuring device 13 is arranged. At this another object to be measured 14 is attached in the immediate vicinity of Stopfaggregat 6. This is a geometrically characteristic extension that covers a part of the light source relative to the camera 12 as a shading object. This is, for example, a rod or a stamped sheet metal. By means of the further measuring object 14, the position of the track 3 is determined at this point, so that there fixed with the tamping 6 track position can be adjusted to a predetermined target track position.
    [33] In the first embodiment, contactless measuring devices 9, 10, 13 are shown in relation to the track 3 (FIGS. 1, 2). In this case, each measuring device 9, 10, 13 comprises a position measuring system 15 to the
    Location of the rails 2 against the measuring devices 9, 10,13 to measure. The respective position measuring system 15 comprises, for example, for each rail 2 a laser line scanner or another known optoelectronic sensor.
    [0009] Based on a coordinate system of the measuring device 9, 10, 13, cross-sectional profiles of the respective rail 2 lying one behind the other are detected during a forward movement of the track-laying machine 1. This results in a position model of the respective rail 2, by means of which the coordinates of defined measuring points 16 are determined. For each measuring device 9, 10, 13, the measuring points 16 result as points of intersection of a reference plane 17 aligned normal to the rails 2 with the theoretical running edge of the respective rail 2 (on the inner contour 14 mm below the rail top edge).
    For calculating the measuring point coordinates, the system comprises as evaluation device 18 a computer which is arranged, for example, in a control room of the track-laying machine 1 and connected to the measuring devices 9, 10, 13 via a bus system. In this case, synchronization times are predetermined, which enable a temporal comparison of the measurement results.
    [36] In addition to the measurement results, the geometrical conditions of the track-laying machine 1 are used for the calculation of the measuring point coordinates. The evaluation is simplified if the measuring devices 9,10,13 are always aligned normal to the rails. This is easily done by arranging the outer measuring devices 9, 10 on a bogie frame of the respective chassis 5.
    [37] The camera 12 has a pickup area 19 defined by camera parameters such as lens focal length and image sensor size. In addition, a selected lens diaphragm determines the depth of focus within the recording area 19. The camera 12 is aligned in the direction of the two measuring objects 11, 14. These are thus arranged in the recording area 19 of the camera 12.
    [38] In Fig. 2, the three measuring devices 9,10,13 are shown in a cornering. In this embodiment, the rear and the middle measuring means 9, 13 maintain their position relative to the machine frame 4 at. The front measuring device 10 is laterally displaceable relative to a holder 20 so that the two measuring objects 11, 14 remain aligned with respect to the camera 12 on a common axis 21. For this purpose, for example, a spindle drive is provided, which tracks the outer measuring object 11 during cornering by means of a control. Alternatively, the measuring device 10 may be displaceable relative to the machine frame 4. The displacement is used for coordinate calculation of the measuring points 16.
    [39] The position measuring system 15 can be omitted if the respective measuring device 9, 10, 13 is designed as a measuring carriage and is guided by means of wheels 22 on the track 3 (FIG. 3). The wheels 22 must be pressed laterally against the rails 2, so that the respective measuring device 9,10,13 has a clear position relative to the rails 2. In this case, the calculation of the coordinates is easier to carry out because the evaluation of the position measuring systems 15 is omitted. However, the maintenance costs increase due to the moving components.
    [40] For use in tight curves, the camera 12 and the outer measuring object 11 are arranged to be laterally displaceable. With this controlled tracking, the two measuring objects 11, 14 and the camera 12 remain aligned on a common axis 21. For this purpose, the camera 12 and the outer measuring object 11 are each guided on a holder 20 and displaceable by means of an actuator. With the track construction machine 1, the measuring devices 9, 10, 13 are connected in this embodiment via a respective movable suspension.
    [41] A purposeful pivoting of the camera 12 may also be meaningful in order to hold the measurement objects 11, 14 in a central viewing axis 37. When calculating the coordinates of the measuring points 16, the corresponding horizontal and / or vertical pivot angle is then taken into account. Otherwise, it is sufficient, the recorded displacement paths of the
    Camera 12 and the measurement objects 11,14 in the calculation to include.
    [42] Examples of recorded by the camera 12 shots 23 of the measuring objects 11, 14 are shown in Figures 4, 5, 7, 8, 11 and 12. The recordings 23 of FIGS. 4 and 5 result from a system arrangement according to FIG. 2. The recordings 23 are evaluated by means of pattern recognition. For this purpose, suitable camera systems and software solutions have long been known.
    [43] The position of the detected measuring objects 11, 14 is determined on the basis of given reference systems. As a rule, a first reference system with an x-coordinate axis xo, a y-coordinate axis yo and a coordinate origin Uo is defined for the camera 12 in the image sensor plane. The coordinates of all detected elements are related to this first frame of reference.
    [44] Separate reference systems are provided for the position measuring systems 15 for determining the positions of the measuring objects 11, 14 relative to the track 3. Concretely, a second reference system having an x-coordinate axis Xi, a y-coordinate axis yi and a coordinate origin Ui is assigned to the middle measurement object 14 designed as a shading object. A third reference system with an x-coordinate axis X2, a y-coordinate axis y2 and a coordinate origin U2 is assigned to the outer measurement object 14 designed as a light source.
    [45] The measuring points 16 on the rails 2 are first detected by means of the respective position measuring system 15 in the associated reference system and then transformed to the first reference system. In this case, z-coordinates of the measuring points 16 are obtained via the known geometrical conditions. To synchronize the measuring results, a rail model formed by means of the position measuring systems 15 is used. This need is eliminated if the measuring devices 9, 10, 13 are always aligned normal to the rails 2 and all measuring points 16 can be detected simultaneously.
    Anyway, a relative or absolute assignment of the measuring points 16 to geo-coordinates of the track 3 makes sense. In this case, the measuring point coordinates detected in the first reference system are transformed to a superordinate coordinate system of the track-laying machine 1 or the track 3. This superordinate coordinate system is fixed in a known manner by means of an inertial measuring system, by means of a GNSS system and / or by means of fixed points mounted next to the track 3.
    The receptacle 23 in Fig. 4 results when the measuring devices 9, 10, 13 are arranged on a straight, level track 3 without twisting. Then, the shadow 24 resulting from shading of the central measurement object 14 is centered over the light surface 25, which is formed by the front measurement object 11. This is an exemplary adjustment for a starting position. The silhouette 24 and the light surface 25 can be evaluated as geometric figures in the image by means of pattern recognition. For this purpose, corner points or intersections of figure edges with defined evaluation lines are usually detected and related to each other.
    [48] The recognizability of the measuring objects 11, 14 is facilitated if they have redundant elements. This is evident in the silhouette 24 produced by means of a cross-shaped shading object with its twelve geometrically arranged vertices. But even the square light surface 25 remains recognizable when a corner is obscured by, for example, dust or an obstacle 26 (FIG. 5). Such an obstacle 26 may be, for example, a chassis 5, which partially slides in a curve between the camera 12 and the measurement object 11.
    Cornering results in a receptacle 23 according to FIG. 5. This usually leads to a distortion and displacement of the measuring devices 9, 10, 13 relative to each other. Conditional is the distortion due to elevations or ramps in track 3, which are detected with the present system. To determine the lateral displacement, the light surface 25 of the outer measurement object 10 is tracked laterally so that the centers of the light surface 25 and the silhouette 24 always lie on a common vertical axis 26. The distance between this axis 26 and the y-axis yo of the first reference system indicates the lateral displacement of the middle measurement object 14. The lateral displacement of the front measuring object 11 additionally results from the displacement path of this measuring object 11 relative to the holder 20.
    [50] To determine the distortion, a tilting of the light surface 25 or the silhouette 24 is evaluated. First, a first tilt angle oci is detected, around which the silhouette 24 in the receptacle 23 is tilted. A second tilt angle <X2 indicates by how much the light surface 25 in the receptacle 23 is tilted. In addition, the measurement results of the position measuring systems 15 are evaluated. By means of the evaluation device 18, the twisting values of the track 3 are calculated therefrom.
    The altitudes of the track 3 and the two rails 2 are also detected by evaluating the positions of the light surface 25 and the silhouette 24 in the receptacles 23 and the position measuring systems 15. Specifically, the displacements of the measuring objects 11, 14 in the y-direction and the transformed coordinates of the measuring points 16 result in the height values for the rails 2. If the respective measuring device 9, 10, 13 is a measuring carriage guided on the rails, then the height values are calculated from the Displacement values and tilt values of the measurement objects 11,14 determined.
    [52] In Fig. 6, the average measuring device 13 is shown in a front view. This measuring device 13 is conveniently connected to the lifting-straightening unit 7 or to a tamping unit frame. In this way, the measuring device 13 follows the lateral movement during cornering or a track displacement by lifting-straightening unit. 7
    [53] The measuring device 13 is designed without contact with respect to the rails 2 and therefore comprises a position measuring system 15. For example, a laser line scanner is directed against each rail in order to detect the position coordinates of measuring points 16 in the reference system of the measuring device 13. Conveniently, the origin of this reference system is the center of the measuring object 14, which is mounted on a cross member 28 of the measuring device 13.
    [54] By evaluating the measurement results of the position measuring system 15 and the above-described position determination of the test object 14 with respect to
    Camera 12, the elevation 29 of the outer rail 2 relative to the inner rail 2 is determined.
    [55] A tracking of the outer measuring object 11 for determining the lateral displacement can be omitted if a characteristic pattern 30 is attached to the measuring object 11. Corresponding receptacles 23 are shown in FIGS. 7 and 8. In this case, for example, the y-axis yo of the first reference system forms an evaluation line 31, by means of which the lateral position of the recorded pattern 30 is determined.
    [56] The captured image detail is chosen so that only a part of the pattern 30 is detected and evaluated. Therefore, a wide light source is arranged as the measurement object 11, which projects laterally beyond the image detail. Conveniently, the pattern 30 is arranged in a region of the light source which is not shaded by the middle measurement object 14. It may also be useful to arrange a plurality of cameras 12 to adjust the receiving area 19. This also applies to other embodiments of the invention.
    [57] The central measurement object 14 may also have a characteristic pattern 30 for detecting a change in position. For example, geometrical figures are punched into the measuring object 14 designed as a sheet-metal part, so that the light source of the front measuring object 11 shines through. These may be so-called fiducial markers, which can be identified by means of pattern recognition and image evaluation.
    [58] If both measuring objects 11, 14 have a characteristic pattern 30, unwanted pivoting movements of the camera 12 can be detected immediately. The measured objects 11, 14 then move in the same direction, taking into account the distance ratio. Such an evaluation is then interpreted not as a movement of the measuring objects 11, 14, but as a pivoting movement of the camera 12.
    [59] Other unwanted disturbances such as vibrations can be filtered out with a correspondingly high frame rate. The frame rate must be so high that the movements of the objects captured in the images due to the vibrations can be traced. In addition, it may be useful to provide a camera system with integrated image stabilization.
    [60] In another embodiment, the middle measurement object 14 is designed with self-luminous elements. In this case, for example, light-emitting diodes are arranged in a characteristic manner, which are easily detectable by means of the camera 12. This improves the image recognition in difficult environmental conditions, for example at night or in the case of heavy dust.
    [61] A simple evaluation is given if the characteristic pattern 30 has a triangle 32 (FIGS. 9, 10). One side of the triangle 32 is aligned horizontally in a neutral position of the system. Above and below the triangle 32 are also horizontal lines 33 arranged to detect a tilting of the pattern 30.
    [62] The detection of the pattern 30 will be described with reference to FIGS. 9 and 10. In this case, the edge of the captured by the camera 12 recording 23 is shown in dashed lines. In the middle of the receptacle 23, the central evaluation line 31 is arranged. To the left and right of it, further evaluation lines 34 are provided. The evaluation lines 31, 34 are used for pattern recognition by intersection points of these evaluation lines 31, 34 with edges of the triangle 32 and with lines 33 are searched by means of a corresponding image evaluation software. Detected points 35 are marked with small squares in FIGS. 9 and 10.
    [63] Such a representation serves not only for the further image evaluation, but also for the adjustment of the system by an operator. For this purpose, the computer is connected to a control unit and a monitor. In addition, other programs are implemented in the computer in addition to the pattern recognition and image evaluation software. For example, the determined position coordinates of the measuring points 16 are processed for a machine control and stored in a data memory for archiving and documentation.
    [64] Based on the detected points 35, a height 36 of the triangle 32 is determined and stored as a characteristic variable for the present lateral position of the pattern 30. A corresponding evaluation scheme is implemented in the pattern recognition and image evaluation software. Other forms such as diamonds or trapezoids are suitable for the evaluation process.
    [65] In order to determine a change in the position of the pattern 30, pattern recognition and image evaluation take place again in an updated image 23 (FIG. 10). A tilting of the pattern 30 can be seen from the points 35 identified along the parallel lines 30. Thus, the detected height 36 of the triangle 32 can also be converted to a value which corresponds to the non-tilted triangle 32. This value is representative of the updated lateral position of the pattern 30.
    [66] The described embodiments represent only some of the variants encompassed by the invention. For example, in a further variant of the invention, more than two measuring objects 11, 14 are arranged in order to detect further position data. With three measuring objects, a so-called four-point measurement is feasible, with the coordinates of the measured objects and the camera 12 being evaluated. For example, two shading objects and one position-detected light source or three shading objects are arranged. Thus, in particular depressions of the track 3 can be detected.
    FIGS. 11 and 12 show photographs 23 of two measuring objects 11, 14 designed as shading objects, which stand out as patterns 38, 39 with respect to a backlight 40. For this purpose, viewed from the camera 12, a light source is arranged behind the two shading objects. This light source need not have characteristic features for pattern recognition.
    [68] Only the shading objects have a characteristic shape, wherein a shading object can be attached directly to a luminous surface of the light source. Both shading objects can also be arranged at a distance from the light source, wherein the distances between the shading objects and the camera 12 are used for position determination.
    [69] A neutral position of the shading objects is shown in FIG. Each shading object generates a cross-shaped pattern 38, 39. The positions of the coordinate origins Ui, U2 and the orientation of the crosses are detected by pattern recognition. In the event of a change in position, the changed positions of the coordinate origins Ui, U2 and the changed orientation of the crosses are recognized and the new coordinates of the measuring objects 11, 14 are calculated.
    权利要求:
    Claims (15)
    [1]
    claims
    A system for measuring a track (3), which comprises in the longitudinal direction (8) of the track (3) two outer measuring devices (9, 10) and a middle measuring device (13) arranged therebetween, each measuring device (9, 10, 13 ) has a specific position relative to the track (3) in order to detect geometric track parameters, characterized in that the one outer measuring device (9) comprises a camera (12) with a receiving area (19) in the receiving area (19) Measuring object (11) of the other outer measuring device (10) and a measuring object (14) of the central measuring device (13) are arranged and that the camera (12) is connected to an evaluation device (18) for pattern recognition.
    [2]
    2. System according to claim 1, characterized in that the measurement object (11) of the other outer measuring device (10) is designed as a light source and that the measurement object (14) of the central measuring device (13) is designed as a shading object, which is a part the light source against the camera (12) shaded.
    [3]
    3. System according to claim 1, characterized in that the two measuring objects (11, 14) are designed as shading objects, each of which shadows a part of a light source relative to the camera (12).
    [4]
    4. System according to one of claims 1 to 3, characterized in that in the receiving area (19) of the camera (12), a further measurement object is arranged.
    [5]
    5. System according to one of claims 1 to 4, characterized in that at least one measurement object (11,14) has self-luminous elements.
    [6]
    6. System according to one of claims 1 to 5, characterized in that at least one measurement object (11, 14) or the camera (12) on a holder (20) of the associated measuring device (9, 10, 13) displaceable and / or pivotable is trained.
    [7]
    7. System according to one of claims 1 to 6, characterized in that the measuring objects (11,14) and the camera (12) are each arranged on a track-mounted measuring carriage.
    [8]
    8. System according to one of claims 1 to 7, characterized in that the system comprises a track construction machine (1) on which the measuring means (9, 10, 13) are arranged.
    [9]
    9. System according to claim 8, characterized in that at least one measuring device (9,10, 13) is associated with a position measuring system by means of which the position relative to the track (3) can be determined.
    [10]
    10. A method for operating a system according to one of claims 1 to 9, characterized in that the system along the track (3) is moved and that thereby the changes in position of the measuring objects (11,14) by an evaluation of the means of camera (12) recorded recordings of the measurement objects (11, 14) are determined.
    [11]
    11. The method according to claim 10, characterized in that the system is given a characteristic vibration frequency and that for the camera (12) a frame rate is set, which is at least twice as high as the characteristic vibration frequency.
    [12]
    12. The method according to claim 10 or 11, characterized in that at least one measuring object (11,14) or the camera (12) is displaced and / or pivoted when cornering.
    [13]
    13. The method according to any one of claims 10 to 12, characterized in that by means of the camera (12) attached to a measuring object (11,14) attached pattern (30) whose image in a change in position of the pattern (3) in a characteristic manner changed, recorded.
    [14]
    14. The method according to any one of claims 10 to 13, characterized in that a working unit (6, 7) of a track construction machine (1) in dependence of the detected position of a measuring object (11,14) is driven.
    [15]
    15. The method according to any one of claims 10 to 14, characterized in that at least the position of a measuring object (11, 14) or the camera (12) relative to the track (3) is detected without contact by means of a position measuring system (15).
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    同族专利:
    公开号 | 公开日
    AU2017294920A1|2018-12-13|
    EP3481999B1|2020-12-02|
    EP3481999A1|2019-05-15|
    AT518839B1|2018-12-15|
    WO2018010827A1|2018-01-18|
    CA3025041A1|2018-01-18|
    PL3481999T3|2021-05-31|
    EA201800569A1|2019-06-28|
    CN109477313B|2021-09-03|
    JP2019522203A|2019-08-08|
    EA037254B1|2021-02-26|
    CN109477313A|2019-03-15|
    ES2843832T3|2021-07-20|
    US20190257037A1|2019-08-22|
    引用文献:
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    DE2001542A1|1969-01-22|1970-07-30|Plasser Bahnbaumasch Franz|Device for checking, displaying and / or monitoring the correction of the position of a track|
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    JPS5356056A|1976-11-01|1978-05-22|Shibaura Eng Works Ltd|Orbital deviation detector|
    RU2041310C1|1991-06-27|1995-08-09|Франц Плассер Банбаумашинен-Индустригезельшафт, мбХ|Predometer|
    DK1001085T3|1998-11-11|2005-02-14|Plasser Bahnbaumasch Franz|Method and padding machine for padding a track|
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    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    ATA325/2016A|AT518839B1|2016-07-11|2016-07-11|System and method for measuring a track|ATA325/2016A| AT518839B1|2016-07-11|2016-07-11|System and method for measuring a track|
    PCT/EP2017/000696| WO2018010827A1|2016-07-11|2017-06-14|System and method for measuring a track|
    EP17730375.7A| EP3481999B1|2016-07-11|2017-06-14|System and method for measuring a track|
    JP2019500871A| JP2019522203A|2016-07-11|2017-06-14|System and method for measuring trajectories|
    AU2017294920A| AU2017294920A1|2016-07-11|2017-06-14|System and method for measuring a track|
    US16/317,153| US20190257037A1|2016-07-11|2017-06-14|System and Method of Surveying a Track|
    CA3025041A| CA3025041A1|2016-07-11|2017-06-14|System and method for measuring a track|
    CN201780042897.6A| CN109477313B|2016-07-11|2017-06-14|System and method for measuring a track|
    PL17730375T| PL3481999T3|2016-07-11|2017-06-14|System and method for measuring a track|
    ES17730375T| ES2843832T3|2016-07-11|2017-06-14|One-way measurement system and method|
    EA201800569A| EA037254B1|2016-07-11|2017-06-14|System and method for measuring a track|
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