Mode and a photolaser arrangement for definition of the diameter of wheel pairs of a railway mobile train

FIELD: definition of the diameter of wheel pairs.

SUBSTANCE: the mode and photolaser arrangement for definition of the diameter of wheel pairs of a railway mobile train in conditions of its moving is based on the principle of measuring with the help of a photolaser arrangement of sizes which characterize the changing of the diameter of wheel tread and a degree of deterioration(wear) of the wheel pair band and also is based on the principle of computing the diameter of the wheel according to a wheel rolling circle according to the formula characterizing the changing of the diameter depending on current meaning of a chord of the wheel tread and the magnitude of a wheel tread wear. The execution of the mode of measuring of the chord and of the wheel tread wear is made by way of using of laser sources of light installed along one side of the track, horizontal and vertical photoreceiving mould "toolbars" installed on the other side of the inset in the rail and the track. Precision of measuring of geometric sizes of the wheel pair in the range of ±0.1 mm is achieved at the expense of using of laser sources of light and of photoreceivers in the shape of the mould "toolbars".

EFFECT: increases quality of precision of measuring; using of a laser commutation system and reliability of measuring elements under any weather conditions.

4 cl, 6 dwg

 

The invention relates to measuring systems for measuring the geometrical dimensions of the cylindrical articles and, in particular, to determine the diameter of the wheel pairs of railway rolling stock in terms of its movement.

A known method of measuring the diameter of the wheels of the rolling stock consists in irradiation of the wheelset, the reception of the reflection signal and determining a reference point coinciding with the projection of geometric center of the wheel [1]. Finally the wheel diameter is calculated by measuring the distance from the axis of the sensor location, the first ranging channel to the wheelset and known to the underlying dimensions of placing sensors along the rail wheels. The main disadvantages of this method are that is viewed low class measurement accuracy due to the inevitable dispersion of the reflected light flux from the surface band wheel pair, due to the inevitable errors that arise when determining the distance from the axis of the ranging sensor to the wheelset, etc. In particular, the performance measurement system significantly will depend on the condition of the surface and the geometric profile of the brace and to a large extent on weather conditions.

The aim of the present invention is to extend the scope of the ISM is rhenium, upgrade the accuracy and reliability of the measuring system in all weather conditions.

This goal is achieved through the use of the measurement system focused laser light source, photodetector matrix “cells” and barriers precluding the ingress of precipitation as snow or rain.

The method of the diameter measurement is to calculate the diameter of a wheel rolling circle depending on fixed andithe first chord at a constant level from the rail head Hiand fixed hith height of the ridge from the surface of contact of the pair of wheels with the rail.

Geometrical dimensions of the wheels and the values of the chord at a constant level from the rail head is illustrated in figa, b. When this current value of the wheel diameter in a circle their Catania (dik) is equal to:

where ai- measured the size of the chord on Hilevel from railhead, mm;

hi- i-I the height of the ridge from the wheelset, mm.

According to expression (1) shows that Hiand aiit is necessary in the measurement system to provide control of the height of the ridge (hi), which is subject to wear (rental) band (δi) is equal to:

where hH- the nominal height of the ridge at Otsu is under wear bandage.

From equation (2) depreciation (car) tire wheel pair is equal to:

Thus, along with the measurement of diameter dikthe method allows to control the degree of wear of the band (δi).

Known photo-optical device for measuring the geometric dimensions wheelset rolling stock contain illuminators, optical lenses, converters and solar cells, are connected to the decoders and the registration unit of the measurement results [2, 3].

However, along with positive developments in the field of measuring technique known devices have disadvantages, which, as already noted, is evident in the fact that they are low-class measurement accuracy and low reliability, depending on weather conditions.

General layout of the laser treatment device for measuring the chord aithe wheels and the height of the crest of the hishown in figure 2 and 3, which includes: rail box 1 with the processing box 2, horizontal and vertical photodetector matrix “line” 3, 4, typical solar cells 5, 6 and laser light sources 7, 8, 9, 10, equipped with PLANO-convex lenses. Figure 2 also shows a block diagram of the measuring system of the device, which includes: the power supply of the laser light sources (BP), the switching unit (KB, decoders (DS, DS), personal computer (PC) and block the registration of the measurement results (BR).

Figure 3 shows the dimensions of the ridge hnhiwear (car) band δiand also shows the location of the laser light source 10 and matrix rulers 4 opposite the technological window 2 rail insert 1. As further explanation, it should be noted that to improve accuracy class provides a matrix range of 3, 4 with linear increments of cells not more than 0.1 mm, it should Also be noted that the size of Hiset of conditions of vacancy "shot" of laser light sources 9, 7, and 8 under the frame of the bogie wheel sets car on one side of the track to the other.

To exclude the effects of precipitation as snow or rain on the reliability of the items measuring system allocated portion of the road are equipped with protection in the form of slabs 12 and side rails 13 (see figure 4).

Laser treatment device operates as follows. Before the process control wheelset train operator includes a measuring system and later in automatic mode, the measured height of the crest of the hiand notochord andieach pair of wheels at the level of Hifrom the rail head in the following order. At the time of cutoff of the light beam from the laser source 7 obespecivaet is through the switching unit KB connect a laser source 8, 9, 10 and then depending on the size of the chord and the height of the crest of the signals to the decoders DS and DS. The value of hifixed at the time the minimum lighting matrix rulers 4. Finally, the expression (1), the operation of calculating the diameter of a wheel rolling circle is made on a personal computer.

Similarly, the measurements of hialso via a PC is determined by the amount of wear (rental) band δi.

Disabling the measuring system is carried out automatically by photocell 6 and the switching unit KB at the time of ridge cutoff wheel linear laser light source 8.

The geometric position of the wheelset in measurement times of their chords laser treatment device shown in figure 1, C.

The effectiveness of laser treatment method and device designed for its implementation, is achieved by increasing class measuring accuracy and reliability of the measuring elements in all weather conditions. In particular, through the use of laser light sources and photodetectors in the form of a matrix lines is achieved measurement accuracy of the geometric dimensions of the pair of wheels in the range ±0.1 mm

The effectiveness of the method and device is also achieved by the possibility of measuring wear (car) tyres the Olesno pairs.

Sources of information:

1. RF patent №2124180, CL G 01 In 11/08, 1998

2. AS the USSR №156971, CL G 01 07/00, 1963

3. AS the USSR №275102, CL 61 K 9/12, 1970

1. The method for determining the diameter of the wheel pairs of railway rolling stock in terms of its movement, consisting in measuring votesmarternow system geometrical dimensions, characterizing the rate of change of the diameter of the wheel pairs from the initial base size, characterized in that votesmarternow system placed at a constant level from the rail head Hifixed current values of the chords airims wheels and also votesmarternow system fixed height of the ridges hifrom the wheelset and finally calculate the diameter of the wheel rolling circle:

2. The method according to claim 1, characterized in that the difference between the hith height of the crest and initial-base hHdetermine the degree of wear (rental) tire wheelset, that is,

3. Laser treatment device for determining geometrical dimensions, characterizing the rate of change of the diameter of the wheel pair, consisting of a light source with a focusing system that is installed on one side of the insertion path, and photovoltaic cells installed on the other side of the insert, the cat who are connected to the decoder, personal computer and then to the Registrar of the measurement results, wherein the photodetecting elements for measuring aithe first chord of the wheel rim and hith height of the crest is made in the form of a matrix rulers with linear increments of not more than 0.1 mm, and horizontal matrix "ruler" and the laser source designed for fixing aifirst chord rim wheel pair, installed on Hithe first level from the rail head, providing a free "shot" of the laser beam of light under the frame of the bogie wheel sets car on one side of the path to another.

4. Laser treatment device according to claim 3, characterized in that the introduced model of the solar cells and laser light sources, designed for start-up and operation of the measuring system, are also located on the Hithe first level from the rail head and in General allotted a plot of the path, designed to control wheel is protected from external precipitation by overlapping and side rails.



 

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