Method of assessment the track with the construction of three-dimensional spectral maps

 

The invention relates to rail transport, and is intended for monitoring and evaluation of the condition of the rails. The measuring device is moved along the rail track and record the shape of the rails. Implement sliding spectral analysis of the recorded image. Determine the intensity of the harmonic components as a function of the moving coordinates of the path and wavelength. Them detect the speed of cars under various loading and path coordinates, for which you may experience resonance. Registration of contours is carried out for both rail lines and sliding spectral analysis produce harmonically conjugate functions by obtaining the spectrum of the complex coordinate pairs of rails and/or pairs of parameters outlines one rails. Technical result - providing a resonant safety rail vehicles due to early diagnosis paths and high-speed routing traffic on the long sections of the route. 4 C.p. f-crystals, 2 Il.

The invention relates to the field of rail transport, and is intended for monitoring and evaluation of the condition of the rails.

There is a method to set the frame truck car sensors vertical accelerations of the frame and vertical displacements of the books relative to the frame, the signal parameters are calculated first vertical trajectory books, and then vertical irregularities in the track (EN 2134319 C1, E 01 35/06, 10.08.1999; EN 2035534 C1, E 01 35/06, 20.05.1995).

The disadvantage of this method is determined by the low precision of the estimate due to significant errors produced by linear measurements.

There is also known a method of condition monitoring of railway track, which consists in determining the geographical coordinates of the start point of the car-potenzmittel according to the satellite navigation system and memorizing them together with the a priori value, and the measurement of the movement of the car-potenzmittel loop and asynchronously values of the traversed path, the power factors of the dynamic interaction between rolling stock and rail track, the height of the irregularities on the running surface of the rails, the orientation angles of the car-potenzmittel in a geographic coordinate system and accelerations in the direction of the axes of the associated coordinate system of this car (EN 2114950 C1, E 01 35/00, 10.07.1998).

There is a method allows to measure the true geometrical parameters of the track with high accuracy and reliability when driving car potenzmittel speeds of up to 250 CMU is a method of assessing the condition of the track, which move along a rail track measuring device, register the shape of rail lines and determine the defectiveness way of statistical correlational method (Baluch Henrik, Diagnosis superstructure, M., Transport, 1981, S. 146-193).

The disadvantage of this method is that it is not possible to determine the resonant dangerous parts of the track.

It should be noted that the train crew, as the sprung mass and, therefore, representing a complex mechanical oscillator circuit, the ensemble has its own vibrational frequencies, dependent on both the mechanical characteristics of this crew (i.e., its type, degree of wear of the main mechanical components, etc.,) and from his boot.

When driving on uneven road, the spectrum of which in addition to "white" noise may be present harmonic outlines of rail lines, the crew at a certain speed can get into resonance with these harmonics, which, in turn, can lead to such unpleasant phenomena as intense kilaloe and side swinging of the crew, his gallerani, superstep and, in the worst case, smashed.

The invention adowanie irregularities longest section of the route (moving spectral analysis for the localization of such harmonic components and their intensities as by location (km, kilometraje) and wavelength (in meters).

This objective is achieved in that in the method of estimating the condition of the track, which move along a rail track measuring device and record the shape of the rail lines, perform sliding spectral analysis of the recorded shapes, thus determine the intensity of the harmonic components as a function of the moving coordinates of the path and wavelength and detect the speed of cars under various loading and path coordinates, for which you may experience resonance, and form a three-dimensional spectral map of the investigated area the way.

The task is also promoted by the private significant features of the invention.

As a measuring device used wagon-potenzmitel, and as the moving coordinates - the coordinate of the moving car potenzmitel.

Registration of contours is carried out for both rail lines and sliding spectral analysis produce harmonically conjugate functions by obtaining the spectrum of the complex coordinate pairs of rails and/or pairs of parameters outlines one rails.

Spectral map issledovatelnyj from the point of view of resonance security.

In Fig.1 presents a General framework for the implementation of the proposed method comprising sequentially connected measuring device (wagon-potenzmitel) 1 spectrum analyzer 2 registered shapes of rail lines, the site of formation of 3-dimensional spectral map of the investigated area the way, the compute node 4 resonant speeds and node speed routing 5.

In Fig.2 shows the spectral map section of the route.

The proposed method is as follows.

Along the track to move the car potenzmittel 1 and record the shape of the rail lines. Next, by using a spectrum analyzer 2 perform sliding spectral analysis of the recorded shape and determine the intensity I of the harmonic components as a function of the moving path coordinates (x) and wavelength ():I = S(x,). In the basis of the analysis algorithm is the fast Fourier transform with a moving argument along the way (along the X-axis).

Found the intensity I of harmonic components allow for using a node form a 3 to construct a three-dimensional spectral map of the roughness of the investigated area of the path which, in spermonica, what wavelength and what is its intensity? For example, it was found that the 110-km section of the Moscow-Borodino 51-kilometer have a very distinct harmonic with a wavelength of 6.3 m and amplitude (intensity) 3 mm

This knowledge allows the compute node 4 to calculate such rates for different types of cars (and download them), in which the movement in this area will lead to the occurrence of the resonance phenomenon. Knowledge of the resonance curves wagons (q) makes it possible to calculate the amount of resonance.

Thus, the present invention relates primarily to issues of safety, and if the railway workers interested in this question from the point of view of early diagnosis and path planning and resource allocation repair crews and equipment, Prime movers possession of spectral maps of the route will allow using node 5 to perform "rapid transfer" movement, as a local (generation of velocity profiles V(s) on this route, optimal from the point of view of resonance safety, and strategic planning of movement (up to schedule changes).

In addition, the motion at the resonant speed, obviously, is harmful from the point of view b is spatial increased dynamic loads on all their designs, including axial bearings, a pair of wheels, head rails, etc. and on the other hand, the law on the action is equal to counteraction, more intense load tests and the path (when driving at resonance), thereby reducing turnaround time and increasing operational costs. And finally, all these phenomena require excessive energy consumption, which, in turn, leads to burnout.

Therefore, in addition to safety, the urgency of the present invention concerns suplying, among which are: - reduction of wear of rolling stock; - increase the turnaround time of operation of the railway track; increase energy efficiency; reduction in overall operating costs.

We emphasize again that the current amplitude analysis method outlines the limitations and method of the standard deviation (as well as its variant, the moving standard deviation) are respectively too local and too global (statistical) and therefore not giving the necessary information in the above context. Moreover, both methods do not solve the problem of determining the spectrum, and therefore, the availability of harmonicoscillator threads) were considered only stationary spectra of small locally-isolated section of the route length of about one kilometer (generally up to 1 km).

In this case, the first processing section 110 km (with a sampling rate of 47 cm - more than 220 thousand times) by the method of continuous sliding spectral analysis. It built the spectral map and 3-dimensional spectral landscape. Also for the first time seasonally (four times) treated area with running a repair with a length of about 250 km (the total amount of processing is about 1000 km) and identified seasonal changes, as well as for repairs.

Still in the research consisted of one small area (up to 1 km) with the spectral scale from 512 to 1024 samples (the size of the octave: 29- 210), which is rather time-consuming computational process from the point of view of cost of machine time. Despite this, the first processed longest section of the route (110 km) with the spectral scale from 2048 (the size of the octave: 211and more times that determines the increase in computational complexity by more than 2 orders of magnitude, but, as a consequence, an increased resolution spectral analysis and allows to detect more subtle structural differences in the spectral picture on continuous data array.

First held sliding spectral analysis harmonicae etc.

Thanks to the original processing technology of random variables (multivariate factor analysis) first constructed a map of the probability distribution of the intensity in the spectral field (X-axis) and the probability distribution of reviews on q-factor of a single damped oscillator (axis).

Again, for the first time on the results of sliding spectral analysis of the obtained volumetric spectral relief, including a three-dimensional image in space of the terrain with the possibility of cutting its contour and subsequent plotting of the topographs, the flight of the terrain in the space on the computer (multimedia animation).

According to the results of sliding spectral analysis of harmonically conjugate functions obtained colored volumetric spectral maps in three different layers in RGB-space reflected the 3 different sources of harmonic components, then this colored carpet printed on grey relief. Thanks to the obtained volume of the total spectral map can identify not only the presence and the intensity of the harmonics in this place railroad tracks, but you can tell by the color of the degree of contribution in this place or that istb assessment of rail track, which move along a rail track measuring device and record the shape of the rails, characterized in that the implement sliding spectral analysis of the recorded shapes, thus determine the intensity of the harmonic components as a function of the moving coordinates of the path and wavelength and detect the speed of cars under various loading and path coordinates, for which you may experience resonance, and form a three-dimensional spectral map of the investigated part of the way.

2. The method according to p. 1, characterized in that a measuring device is used wagon-potenzmitel, and as the moving coordinates - the coordinate of the moving car potenzmitel.

3. The method according to p. 1 or 2, characterized in that the registration of contours is carried out for both rail lines and sliding spectral analysis produce harmonically conjugate functions by obtaining the spectrum of the complex coordinate pairs of rails and/or pairs of parameters outlines one rails.

4. The method according to any of paragraphs.1-3, characterized in that the spectral map of the investigated area of the path form in color.

5. The method according to any of paragraphs.1-4, characterized in that the security.

 

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