DE2924887A1 - METHOD AND DEVICE FOR STATISTIC RESTRICTION OF AT LEAST ONE CATEGORY OF GEOMETRIC ERRORS OF RAILWAY RAILWAYS AND DOCUMENT THEREFORE FROM THIS RESTRICTION - Google Patents

Description

DESCRIPTION

The invention relates to a method and a device for the statistical description of at least one category geometric error of railroad tracks as well as a document obtained by this paraphrase, which determines are used to make diagnoses with regard to the condition of the rails, to prepare programs for the short-, medium- and long-term maintenance work required for this condition as well as to control this work. In particular The invention relates to a method, a device and a document carrier according to the preambles of claims 1, 2 and 3, respectively.

The geometrical measurement of the two rail lines on railroad tracks for programming the rail maintenance work has only recently been used. It allows you to avoid unnecessary work that was done in the past Programming procedures were necessary in which this work was to be carried out at fixed intervals, with all maintenance work included. The application of the geometric rail measurement thus brings Time and cost savings.

In order for these geometric measurements to be usable for this purpose, however, they must be rewritten into a form which represents the development of the geometrical state of the rail as well as possible for the evaluation and analysis to facilitate the readings.

In the recent past and also currently, these investigations have been carried out on the basis of certain railway networks of graphic records, which is an analog image of the geometric Reproduce properties of the two rail tracks, with the results obtained using previously established Tolerances are compared.

030044/0526

This evaluation and analysis process based on however, graphical recording is tedious and required highly qualified personnel, because the image obtained is in amplitude and position depending on the measuring device used more or less deformed. The staff must therefore use this image with reference to a so-called "paraphrasing function" interpret the input variable with the response variable assumed to be known and directly usable Measuring device connects. Since this picture in pure analogous form is available, the staff must evaluate the results with reference to a size classification given in the graphic quantify and in different categories of increasing size according to the characteristic rail sections before an optimal programming of this work can be created.

A method and a device of the type defined in the preambles of claims 1 and 2 are already known, which make it possible to carry out this quantification and classification automatically. That through such a description obtained document, which is defined in the preamble of claim 3, has the form of a table whose numerical values representing the number of geometrical errors of each class cover the entirety of the surface, and although within the limits of the number of classes and number of test route sections.

This description greatly simplifies the task of the staff to evaluate the geometric rail measurement, provides however, no picture of the development of these measured values. A quick visual interpretation of this development and their critical values is therefore not possible on such a document, thereby reducing the speed of interpretation the results presented in this purely digital form is affected.

03Q0U / 0526

The invention characterized in claims 1/2 and 3 The objective is to remedy the deficiency set out above by dividing the number of errors numerical representing each amplitude class on the surface of the document created by the paraphrase Values for the successive measurement sections is designed to form an analog image of their development.

By suppressing the values that are less than or equal to the selected minimum, a simple solution is created, which highlights the envelope of the amplitude values which are above this minimum error and for each measurement section are counted and divided, the shape of this envelope being significant for the development of the amplitudes the successive sections.

Further features and advantages of the invention emerge from the description of exemplary embodiments on the basis of FIG Drawing. In the drawing show:

1 is a diagram for explaining the transcription method;

Fig. 2 is a block diagram of the rewriting device; and

3 shows a partial view of the document resulting from the transcription.

The example given here concerns surface defects the rail running surface of a rail track, assuming for the sake of simplicity that the minimum selected Number of errors is zero. However, the method can also be used for all other rail geometrical errors, e.g. errors in length and transversal scaling and

030044/0526

Alignment errors, and the selected minimum number can also be different from zero or, for example, a percentage of the express the error measured at each section.

The curve C in FIG. 1 represents the development of the amplitude a of surface defects of the rail running surface of a rail track Figure 2 shown in Figure 2; this rail track is traversed continuously by a measuring carriage 3 and scanned, which is pulled by a vehicle, not shown, and with an electronic sensor 4, which supplies an analog signal proportional to the amplitude of the errors; this car belongs to a measuring device 1.

The measured error amplitudes are shown in the graphic is plotted on the abscissa Oa, and the position of these errors with respect to a spatial origin is on the ordinate Applied ok.

To obtain the digital values from the measured error amplitudes the electronic sensor 4 is connected to an analog / digital converter. The reproduction of the measurement signals Depending on the space traversed by the measuring carriage 3, a magnetic proximity detector 6 enables by means of a gear 7, which is firmly connected to a wheel of the measuring carriage 3, one pulse per each χ Units of linear movement are supplied, in the example described here, each per 100 mm. This value corresponds to χ in the graphic the sub-units of the graduation of the axis Ok for the traversed distances, and the amplitude gradations on the axis Oa represent those numbered from 1 to 9 increasing amplitude classes according to their dynamic effects on the rail and on it moving trains are selected, each of these classes covering the same or different amplitude deviations can. In the example described, extend

030044/0526

ο

these amplitude classes from 0.1 mm for class 1 to 1 mm for class 9.

To describe the results of the measurements carried out obtained with the aid of the measuring device 1 is the Measuring device connected to a processing circuit 8. This includes:

- a memory 9 for recording the error amplitude, those determined at the successive measuring sections Length can be measured, whereby this length here corresponds to the units of the axis Ok for the distances traveled; each unit contains ten amplitude measurements, each at a distance χ from one another;

a classification unit 10 for classifying the amplitudes into a plurality of classes of increasing size, whereby these are the classes already described, which are labeled 1 to 9;

a counter 11 for counting their number in each of these classes and for each measuring section 0.1-0.2-0.3 etc .;

- a discriminator 12 for eliminating all numbers that result from a counting process whose value of interest is less than or equal to the selected minimum, the is zero in this example;

a printer 13 for recording the remaining numbers on a document carrier, which is shown in detail in FIG and can be read in two mutually perpendicular directions, of which one direction k is the sequence of the Measuring sections and the other a represents the sequence of the amplitude classes of increasing size.

From the graph in FIG. 1 it can be seen that the document 14 is determined by itself for each measuring section Amplitude classes specifies a number that represents the number of defects whose amplitude lies in the respective classes, excluding the other classes to which none of the ten measured errors belong and those on the document after

030044/0526

the known method are equal to zero, because the selected minimum is zero.

For the distance 0.1 - * 0.2, for example, the ten have measured Error amplitudes that only fall into classes 5, 6 and 7; only their number in each class is recorded on the document, while on the known document the sequence of the numbers recorded for this route is as follows were

: 0, 2 * 000034300

For the subsequent routes

would result * _ , _ _{n Λ} ,

: 0.3 * 022600000

0, 4 * 022222000

0.5 * 000001540

0, 6 * 000005-5 00

0.7 * 005230000

0.8 * 14 3 200000

When comparing these two ways of paraphrasing, the progress achieved by the invention becomes clear through it is achieved that the envelope of the amplitude values of the measured on each measuring section, counted and classified errors appear, whereby the The appearance of these envelopes provides information about the development of these amplitudes on the successive ones Has sections.

According to one of many possible other embodiments of the invention, another measuring device 1 is provided, based on acceleration measurements; it is also a combination of linear measurement and acceleration measurement possible, as is customary in this field of technology, provided that the measured values supplied reflect the amplitude express the measured error.

030044/0526

The memory 9, the classification unit 10, the counter 11 and the discriminator 12 of the processing circuit can also be replaced by a programmed processor, who fulfills the same tasks.

Document 14 can also contain further records, which concern the second track and other error categories, depending on the desired number of Maintenance or checks.

030044/0526

Claims (3)

Ι »ΑΤΚΜ'λ N VVAl1 I'M I» »JH <) JOHANNES-SCHARRER-STRASSE 13 ■ D-8000 MUNICH 21 Our reference: MP 92 June 20, 1979 SPENO INTERNATIONAL SA, Geneva, Switzerland Method and device for statistical description at least one category of geometric defects in railroad tracks and the document PATENT CLAIMS created by this description 1.- At least a method for statistical description a category of geometric defects of railroad tracks in which the test values show these defects in sequence traversed rail sections of a certain length, these errors are measured and stored for each Section can be divided into a plurality of classes of increasing size according to their amplitude and in which their number is counted in each of the classes and those so obtained. Numbers for each measuring section on one Document carrier are recorded, which is read in two mutually perpendicular directions, wherein one direction the sequence of the measuring sections and the other the sequence of the size classes in increasing order, characterized in that that only the numbers are recorded, the significance of which is greater than a chosen minimum, 030044/0526 2. Apparatus for statistical description at least a category of geometric errors in railway tracks, with a measuring device (1) for measuring the amplitude a sample of the errors and a circuit (8) for processing the measured variables, the processing circuit having a memory (9) for storing the successively traversed rail sections of certain length measured error amplitudes, a classification unit (10) for dividing the amplitudes into a plurality of classes of increasing size, a counter (11) for Counting their number in each of the classes and for each measuring section and a printer (13) for recording the so obtained for each measurement section numbers on a document carrier (14) in two mutually perpendicular Directions can be read, of which one direction is the sequence of the measuring sections and the other the Sequence of the size classes in increasing order, characterized in that the printer (13) is connected to the processing circuit (8) via a discriminator (12) which is derived from the record eliminates all numbers that represent error numbers whose significance value is less than or equal to a selected minimum is. 3. Document carrier for the statistical description of at least one category of geometric errors of Railroad tracks, with a plurality of numbers, each signifying a number of defects, their amplitude is in a given size class and those on successively traversed rail sections are certain Length are counted, these numbers on the document carrier divided into two mutually perpendicular directions of which one is the sequence of the measuring sections and the other is the sequence of the classes in the The order of increasing size, thereby identifying 030044/0526 shows that for each measurement section it only contains those numbers whose significance value is greater than a selected one Minimum is. 030044/0526