Method of and device for noncontact measuring of lateral section or rail-to-rail distance fo track

FIELD: railway transport; permanent way testing facilities.

SUBSTANCE: method of pulling contact system cable comes to the following: each rail 6 is read off by means of distance pickup 16 placed over rail and moved continuously in longitudinal direction of track and scanning in plane 20 passing square to longitudinal direction of track. Problem points of measurement 25 on rail defining geometry of switch are recorded as measurement values in polar system of coordinates. Polar coordinates for measurement values are converted into Cartesian coordinates and information is recorded in memory at continuous measurements of distance by means of measuring wheel after which lateral section for switch 1 is calculated basing on recorded measurement values. Actual measurement values are compared in definite points of measurement 25 with preset values of at least two of enumerated parameters kept in memory, namely, width of clearance between counter-rail and running rail, through clearance or state of tongue as to its wear, minimum width between edge of guide rail and side edge of running rail in curve, width of gauge and/or distance between counter-rails or guide surfaces and deviation of obtained values from preset values. In device for noncontact measurement of lateral section or rail-to-rail distance of track, each pickup 16 is arranged in area over corresponding rail 6 being essentially laser scanner 17 for reading problem points of measurement 25 defining geometry of switch which is made for reciprocation at angle of scanning (α).

EFFECT: provision of quick and accurate determination and evaluation of measurands of vital importance for switch.

4 cl, 6 dwg

 

The invention relates to a method for the contactless measurement of the transverse profile or distance between the rails, in particular in the area of the switch, and device for implementing the method.

From the patent AT 402953 already know the definition gauge rail track by means of two - one for each rail - sensors for distance measurement, which are located on the axis of a wheel of a rail vehicle in the area between the rails.

According to the patent AT 321346 known, furthermore, the method of point lighting heads rail way side, and the reflected rays of light recorded by a device on the photodiodes located vertically above the rail.

In the patent US 3864039 described method, when covering only the bottom of each rail. The receiver light beam located above the rails, registers the shadow of the rail head, and then these signals are converted into position data showing the gauge.

The objective of the proposed invention is thus a method of the specified type, with which it is possible faster and more accurate identification and evaluation of measuring values that are important to the state of the switch.

According to the invention this problem is solved using the method, which has a distinctive attribute is key, given in claim 1 of the formula. Using this method you can now significantly faster and more accurate measurements of various parameters switch for precise control, in particular, for the critical zones of the arrow. While it is possible to reliably document (and optionally print) data on prevailing actual conditions and the condition of the rails and elements of the switch. This can also be especially beneficial images to accurately determine the degree of abrasion or wear of the rail, turnout someone said, controls etc. so that deficiencies related to this, you can respond immediately and purposefully, before there is danger or harmed security. Measurements can be carried out, among other things, extremely tight with respect to the direction of advance of the machine implements a method so that you can achieve full status check switch. In addition, the measurement can be started with the start switch, and with its end, i.e. on both sides.

The invention relates also to a device for contactless measurement of the transverse profile or distance between the rails way, particularly in the area of the switch according to claim 3 of the formula. Thanks to him appeared the possibility of truth is Oh, accurate and above all complete registration data and parameters switch that is critical for the safe operation of the railway track.

Other benefits and forms of carrying out the invention are given in the dependent claims and represented in the drawings.

The invention is described below in more detail with wave to the examples of execution represented in the drawings.

Figure 1 - schematic top view of the switch with a device for implementing the inventive method, is placed on the rail vehicle;

Figure 2 is a transverse view in controls switch according to the arrow II of figure 1;

Figure 3-6 - the image corresponding recorded measuring values.

Figure 1 as the main example shows a typical simple switch 1 with the main by 2 and conversion curve 3, which pass between the start switch 4 and the ends of the switch 5. Switch 1 consists essentially of the rails 6, 7 wags, crosses, 8, guardrails 9 and controlso 10. On the main path 2 can be seen (tentatively identified) rail vehicle 11, in which is included a device 12 for measuring the distance between the rails 6 or transverse profile at different parts of the switch. Under transverse profile should understand the profile rail, resulting from the cross-section perpendicular to the longitudinal direction of the rail.

The measuring device 12 is placed on the measuring carriage 13 with the frame 14, which slides along the rails 6 by means of rollers with the ridge 15 with the cylindrical surfaces of the ski. The measuring carriage 13 is pressed in a known manner arrow translation 1 to the continuous rail line; the drawing is the outer or top rail 6 of the main path 2. In the region above each of the rails 6, which rolls measuring carriage 13, the frame 14 is the distance measurement sensor 16, made in the form of non-contact laser scanner 17, downward to the appropriate rail 6.

Figure 2 is even better, you can see that the laser scanner 17 emits a beam reader 18, which performs reciprocating motion around the rotation axis 19 passing in the longitudinal direction of the main path 2 or scanned in parallel to the rail 6, with scan angle α. This results in a plane reading 20 perpendicular to the longitudinal direction. Laser scanner 17 is installed it does not directly above the rail 6, and slightly offset towards the inner side of the path. The preferred value of x for this shift is 22 mm from the base point A, which is located on the races is the being (preferably 14 mm) below the surface of the rail (SK) on the working face of the head 21 of the rail 6. It turns out (based on standard railway track gauge 1435 mm), the distance between the two laser scanners 17 in the transverse direction is 1391 mm

Distance laser scanner 17 from the surface of the rail (SOK) vertically is preferably 200 mm Combination laser scanner 17 are offset in the horizontal direction and the angle scan α this gives the location at which the plane reading 20 optimally registers all areas of the rail 6 and controls 10 that are exposed to wear and abrasion. This applies, of course, and to parcels switch instead of contrails have a d-pad, guardrails or wags.

During the work for contactless measurement of switch 1 railway vehicle 11 moves through the switch, and the measuring carriage 13 is rolling on the rails 6 at wave rollers with a comb 15, is cylindrical in order to avoid errors in level, and is pressed against a solid rail line. The measurement is carried out from the starting point - the so-called synchrolock - arrow on the translation 1. Both the laser scanner 17 read this continuously in the corresponding plane of the reader 20, while simultaneously using the control wheel to measured the distance I 22 (figure 1) is traversed path. The speed of the trip may be approximately 1 m/s; at the site of wit, speed is about two times smaller.

In each measurement point 25 defined by the beam entering reading 18 on the corresponding rail 6 or the item switch, measured as the distance from the origin, and the angle read 18 as the measuring values in the polar coordinate system. The computing unit 23 provided on the rail vehicle 11, these polar coordinates of the measurement points 25 continuously converted using the program in Cartesian coordinates, and information is overwritten in the storage device in connection with a continuous distance measurement using the wheel to measure the distance 22. The measuring values can be together with that presented on the monitor 24 with a resolution up to 0.1 mm Together with the recorded measurement values are overwritten with the corresponding profiles obtained by calculation, and thus determine the transverse profile of the switch 1. (In addition, if necessary, you can also manually type in the program computing unit 23 and other measurement data and/or defects).

For measuring values, represented schematically, and as illustrated partially in figure 3-5, such to the to, for example, track width and (3), the minimum width between the face of the guide rail and the side face of the running rail in the curve b (figure 4) or the distance between the guide surfaces of controlso (figure 5), there is the possibility, when viewed in the longitudinal direction switch 1 and to consider the appropriate type of switch at different points in the switch or the measurement points 25 to compare individual specified amounts previously recorded in the data block 23 with the actual measured values. Determining the degree of deviation from these default values, you can quickly and accurately determine the wear, particularly at the measurement points 25, substantially determining the geometry of the switch, problem areas switch that accurately due to the special type of switch.

Comply with tolerances automatically validated again. These tolerances are the individual measurement values (for example, those already named: track width and the minimum width between the face of the guide rail and the side face of the running rail in the curve b, the distance between the guide surfaces of controlso with, as well as, for example, the width of the gap between centralism and chassis rails, the width of the approach in the field of controls, through the gap or comprising the s wear someone said), respectively, of 0.25 mm. The values such as transverse height and tenseness of the rail, the tolerance limit is 0.5 mm In excess of the permissible limit values using composing a message about individual errors.

Figure 6 as an example, an important point switch represented by arrow wag 7 adjacent to the rail head 6 and the upper face of which is the measuring point 25 that you want to register. Other examples of the most important points system switch, locally measured or controlled in ways that are, for example, the beginning of wit in the curve or the beginning of edge crossings, rigid or movable. In order for these values it was possible to register service personnel enters the video. Using the corresponding impulse items locally registered point system.

1. Method for the contactless measurement of the transverse profile or distance between the rails way, in particular on the section switch, characterized by the following stages:

a) reading each rail (6) by using the distance measurement sensor (16)located above the rail, moving continuously in the longitudinal direction and scanning in the plane of the reading (20)perpendicular to the longitudinal direction,

b) the region is the acidity problem of measurement points (25) on the rail, substantially determining the geometry of the switch, as the measuring values in the polar coordinate system,

c) converting the polar coordinates for the measurement of variables in Cartesian coordinates and overwrite the measuring values in a storage device in communication with a continuous distance measurement using the wheel to measure the distance (22),

d) calculation of the transverse profile switch (1) on the basis of the registered measurement values

e) comparing the actual measured values at certain points of measurement (25) with previously stored preset values of at least two of the following parameters: the width of the gap between contralesa and a running rail, through the gap or the state of wear of the wag, the minimum width between the face of the guide rail and the side face of the running rail in the curve, track width and/or the distance between controlsome or directing surfaces, and determine the degree of deviation from the specified values.

2. The method according to claim 1, characterized in that in case of exceeding the permissible limit values for the measurement points (25) composing a message about individual errors.

3. The device (12) for contactless measurement of the transverse profile or the distance between elsemi (6) path, in particular, the section switch, having a frame (14)which is arranged to move along the path (2, 3) by means of rollers with a crest (15) and where the sensors measure the distance (16), each of which is associated with a corresponding rail (b), operates in a contactless manner and is installed with the possibility of rotation around the axis of rotation (19), passing in the longitudinal direction, characterized in that each sensor distance measurement (16) is located in the area above the corresponding rail (6) and represents laser scanner (17) to read the problem of measurement points (25), largely determine the geometry of the switch, which is made with the possibility to perform a reciprocating movement with scan angle (α).

4. The device according to claim 3, characterized in that the laser scanner (17) is displaced relative to its associated rail (6) in the direction of the inner side of the path.



 

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