JPH09311032A - Measuring method of rail height deviation with arc tread wheel - Google Patents

Abstract

(57) 【Abstract】 PROBLEM TO BE SOLVED: To accurately measure the deviation amount of a rail by correcting an error due to an arc tread of a traveling wheel. SOLUTION: The vertical movement intervals h _{1 to} h _n between contact points P and Q of a rail tread and an arc tread S ′ with respect to a lateral displacement Δd _{0 of} an upright or inclined rail 1 are obtained in advance as correction data and traveled. The errors of the vertical displacements of the three rails 1 simultaneously detected therein are corrected by the correction data, and the height deviation ΔH of the left and right rails 1 is accurately measured.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for measuring rail height deviation when traveling wheels of a track inspection vehicle form an arc tread.

[0002]

2. Description of the Related Art Two rails forming a track are displaced from a reference position due to various causes, and so-called track deviation occurs. Since track deviation hinders smooth or safe operation of trains, it is regularly or irregularly measured by a track inspection vehicle and always maintained in good condition. There are various kinds of track deviations, and the typical ones are rail height deviations and passage deviations. The structure of the main part of the track inspection vehicle and the outline of the measurement device for both deviations will be described below with reference to FIGS. 3 and 4, respectively.

In FIG. 3, (a) shows a side surface of the track inspection vehicle 2, and (b) shows a vertical section. The track inspection car 2 has a body 21 and
It is provided with three sets of bogies 22A, 22B, 22C which are arranged at equal intervals at the lower part thereof and which are elastically coupled to the vehicle body 21,
Two left and right traveling wheels 221a, 221b and 221c, 221d corresponding to the left and right rails 1L, 1R are provided on both left and right sides of each trolley 22, and each two wheels are connected by an axle to the axle box at both ends. 222
It is pivotally supported by a, 222b. The height deviation measuring device 3 includes three vertical displacement detectors 31a, 31b, 31c, and 31a ', 31b', 31c 'provided on the left and right of each carriage 22A, 22B, 22C.
It consists of a high and low arithmetic circuit 32 provided in the vehicle body. The vertical displacement detector 31a is engaged between the axle box 222a and the underfloor 212 of the vehicle body 21 and detects the vertical displacement amount of the rail 1L at an appropriate distance during traveling. The same applies to the other vertical displacement detectors 31b to 31c '. It should be noted here that each traveling wheel 221a to 221c
2 shows the shape of the tread surface of the rail 1 and its action. That is,
As shown in FIG. 3 (b), the wheel tread S that comes into contact with the tread (upper surface) of the rail 1 of each traveling wheel 221 is formed as a cylindrical surface in three dimensions and a straight line parallel to the axle on the axial cross section. A flange F is provided at its inner end. For this purpose rail 1
Even if L and 1R are displaced to the left and right, the traveling wheels 221 do not move in the vertical direction, and therefore the vertical displacement amount of the rails 1L and 1R is correctly detected regardless of the lateral displacement. In addition, as a supplementary note, the track inspection vehicle 2 is provided with a mileage calculating device for calculating its own mileage as an important function. In FIG. 3 (a), the mileage calculation device 4
Is composed of a pulse generator 41 directly connected to the axle and a distance calculation circuit 42 for the pulse generator 41, and the traveling distance data is sequentially output during traveling. FIG. 3 (c) shows the measurement principle of the height deviation, vertical displacement h _a to h _c of the three height displacement detector 31a~31c three points rails 1L detected simultaneously during traveling,
Enter the height deviation arithmetic circuit 32, arithmetic expression [(h _a + h _c)
The / 2] -h _b = [Delta] H, height deviation amount [Delta] H _L is calculated for a chord connecting two points at both ends, to which is added the above traveling distance data is outputted successively. Height deviation amount [Delta] H _R of the rail 1R also output is calculated similarly.

Next, in FIG. 4, (a) is the plane of the orbit,
(b) shows the vertical cross section of the track inspection vehicle 2, and the deviation measuring device 5 corresponds to both rails 1L and 1R, and the trucks 22A and 22A
Three horizontal displacement detectors 51a, 51b, 51 provided on B and 22C, respectively.
c, and 51a ', 51b', 51c ', and a deviation calculation circuit 52 provided in the vehicle body. The operation is almost the same as the high / low deviation measuring device 3, and each left / right displacement detector 51 is
An optical band is projected onto 1R, and the left and right displacements of the three rails 1L and 1R are simultaneously detected by the reflected light from the tread surface, and the deviation calculation circuit 52 causes the rails 1L and 1R shown in (c) to be detected.
The deviation amounts ΔG _L and ΔG _R with respect to are calculated respectively, and mileage data is added to these and output.

Although the tread surface S of each traveling wheel 221 is a cylindrical surface, this is a special consideration only for the track inspection vehicle 2. On the other hand, the tread surface of the traveling wheel of a general business vehicle is formed in an arc shape (referred to as an arc tread surface). Recently, the traveling wheel having the arc tread tends to be used in a track inspection vehicle, and when this is used, an error occurs in the measured data of high and low deviations. In addition, both rails 1L and 1R may differ depending on the type of sleeper used.
There is an upright section that is erected upright and an inclined section that is slopingly installed. This inclination also causes an error in the measured data due to height deviation. These will be described with reference to FIG. In FIG. 5 (a), the left and right traveling wheels 221a, 221c
An arc tread S'is formed on (the same for each traveling wheel),
The cross section consists of a circular arc portion and a straight line portion. On the other hand, both rails 1L and 1R contacting each other are upright as shown in the figure in the upright section and are slightly inclined in the inclined section.
FIG. 5B shows the details of the cross section of the arc tread S ′ and the corresponding relationship of the tread of the rail 1 to this. The flange F is composed of a circular arc at the lower end and an inclined straight line following the circular arc, and the circular arc tread S '
, There are arc portion S ₂ of the (much larger than phi ₁₎ arc portion S ₁ and the radius phi ₂ of radius phi _1, further right side than the center is composed of straight portions S ₃ was appropriate angle θ inclined. On the other hand, on the tread surface of the rail 1, the left and right edges form an arc E having a radius φ ₃ , and the central portion is a straight line. It should be noted that the radius φ _{3 of the} arc E is formed to be slightly smaller than the radius φ ₁ of the arc portion S ₁ and is set so that the two fit exactly.

Hereinafter, the error of the measured data of height deviation due to the above-mentioned arc tread S'will be described with reference to FIG. In FIG. 6, (a) shows the case where the rail 1 is at the reference position in the left-right direction, and it is assumed that the point P on the tread surface of the rail 1 and the point Q on the arc tread surface S ′ are in contact with each other. When the rail 1 is displaced leftward by Δd ₁ as shown in (b), the contact points P and Q of the two
Also moves to the left and becomes P ', Q'. For this reason, the traveling wheel 221 moves up relative to the rail 1 by Δh ₁ . The amount of increase Δh ₁ is the difference in height difference between the points P and P ′ and the points Q and Q ′. On the contrary, when the rail 1 is displaced to the right by Δd ₂ as shown in (c), the contact points between the two move to the right and become P ″ and Q ″, and the traveling wheels 221 descend by Δh ₂ . The amount of increase Δh ₁ or the amount of decrease Δh ₂ becomes a detection error of the vertical displacement amount, and therefore an error also occurs in the high and low deviation data derived from this. The above is the case where the rail 1 is upright, but the reason why the error occurs is almost the same when the rail 1 is inclined in the inclined section. Strictly speaking, however, the moving positions of the contact points P and Q are not the same as the above, and therefore even if the left and right displacement amounts of the rail 1 are equal, the error that occurs is different from that in the upright position.

[0007]

The various track deviation data measured by the track inspection vehicle 2 are directly used for track maintenance work, and therefore it is necessary to be as accurate as possible, and therefore the deviation of the high and low levels is required. The error of the measurement data due to the arc tread S'should naturally be eliminated. The present invention has been made in view of the above, and corrects an error caused by the arc tread S ',
It is an object of the present invention to provide a method for accurately measuring high and low deviation amounts.

[0008]

SUMMARY OF THE INVENTION The present invention is a method for measuring the height of a rail by using an arc tread wheel, and in a track inspection vehicle having traveling wheels with an arc tread, an appropriate value from a reference position of the rail is set in advance. The vertical movement distance between the contact points of the tread surface of the rail and the arc tread surface of the traveling wheel with respect to the lateral displacement amount of the pitch interval is obtained as correction data, and the lateral displacement amount is used as an address and the correction data is stored in a memory table.
With the horizontal displacement detector and vertical displacement detector equipped on the three sets of track inspection vehicle, the horizontal displacement amount and vertical displacement amount of three points of the left and right rails at the same time are detected simultaneously while traveling, The correction data corresponding to the addresses of the left and right displacement amounts of the three points is read from the memory table for each detection, and the errors due to the arc treads of the detected vertical displacement amounts of the three points are respectively corrected. The corrected vertical displacement amount data is processed by a height deviation calculation circuit provided in the track inspection vehicle, and the height deviations of the left and right rails are sequentially calculated. In the above, the upright section of the track in which the left and right rails are erected upright and the distance section from the starting point of the track inspection vehicle in the inclined section laid obliquely are set in advance in the memory, and The correction data is obtained separately for the upright rail and the inclined rail and stored in the memory table. The correction data for the upright section or the tilted section is selected based on the mileage data that are sequentially output from the mileage calculation device equipped in the track inspection vehicle, and the vertical displacement of the upright rail or the tilted rail is determined by the arc tread. Correct each error.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION In the above method of measuring deviation in height, the vertical movement interval of the contact point between the tread surface of the rail and the arc tread surface of the traveling wheel with respect to the lateral displacement amount at an appropriate pitch interval from the reference position of the rail is preset. The calculated correction data is stored in the memory table with the lateral displacement of the rail as an address. With the left and right displacement detectors equipped on the three sets of track inspection vehicle, the amount of left and right displacement detected for each of the three points on the left and right two rails while the track inspection vehicle is running, The correction data corresponding to each address is read from the memory table, and the errors due to the arc treads of the vertical displacements of the three points detected at the same time are respectively corrected by these correction data, and the corrected vertical displacement data is obtained. The height deviation amount of the left and right rails is calculated by being processed by the height deviation arithmetic circuit. By this error correction, high and low deviations can be accurately measured. In the above, the distance data of the upright section and the inclined section of the track set in the memory in advance are compared with the mileage data sequentially output by the mileage calculation device while the track inspection vehicle is running, and the upright section or Slope sections are selected and stored in advance in the memory table.Correction data for both sections are used to correct the vertical displacement error due to the arc tread, and the height deviation of the upright rail or slope rail can be accurately measured. It

[0010]

1 and 2 show an embodiment of the present invention. FIG. 1 is an explanatory diagram of a method of creating correction data for an arc tread S ', and FIG. 2 is a basic configuration diagram of a correction processing unit 6. .
In FIG. 1, the traveling wheels 221 of the track inspection vehicle 2 are assumed to have an arc tread S ′ similar to that of FIG.
The rail 1 corresponding to this is laid so as to stand upright as shown by the solid line in the upright section and be tilted as shown by the dotted line in the tilted section. However, in the figure, for the sake of convenience, the arcuate tread surface S ′ is shown spaced upward from the tread surface of the rail 1. As the reference position of the rail 1 in the left-right direction, for example, the midpoint p ₁ of the inclined straight line K of the flange F of the traveling wheel 221 and the side surface of the rail 1 are separated by a gap Δg. When the rail 1 is laterally displaced from such a reference position at an appropriate pitch interval Δd ₀ , the contact points P and Q (actually coincident) of the rail 1 and the arc tread S ′ with respect to each displacement amount Δd ₀ are vertically moved. The intervals h _{1 to} h _n are obtained, and these (or their respective differences) are used as correction data for the error in the vertical displacement amount.
However, since there are various sizes of the rail 1, the size of the rail to be inspected is calculated for both the upright position and the tilted position. As a method of obtaining this, there are a method of analyzing the specifications of the arc tread S'and the tread of the rail 1 shown in Fig. 5 (b), and a graphic method using an enlarged model of the arc tread S'and the head of the rail 1. Yes, it is necessary to verify the correctness of the vertical movement intervals h _{1 to} h _n obtained by any of these in the field.

In FIG. 2, the correction processing unit 6 includes six A
A / D converter 61 including A / D converters 611 to 616, a correction calculation circuit 62, an address generation circuit 63, and a correction data table
64 and a distance data memory 65 are connected as shown in the figure, and the correction data table 64 stores the above-mentioned correction data in advance as lateral displacement amounts as addresses. Distance data of the start and end points of the upright section and the inclined section from the traveling start position of the vehicle 2 are set in advance.

A method of measuring the height deviation will be described below with reference to FIG. When the track inspection vehicle 2 travels by inspection, the high and low displacement detectors 31a to 31c (31a 'to 31c') simultaneously detect the vertical displacements of the three points on the rail 1, and the detected data correspond to the corresponding A The data is digitized by the / D converter and input to the correction calculation circuit 62. On the other hand, the upright section or the slope section set in the distance data memory 65 is selected by the travel distance data of the track inspection vehicle 2 sequentially output by the travel distance calculation device 4, and the correction data table is output by the section signal output by this. The correction data for upright rails or tilt rails stored at 64 is selected. On the other hand, the left and right displacement detectors 51a to 51c (51a 'to 51c') simultaneously detect the left and right displacement data of three points, which are digitized by the corresponding A / D converters, and then the addresses are generated. Circuit 63
Address signals corresponding to the horizontal displacement amount are generated respectively, and the correction data for these are read out from the correction data table 64 and transferred to the correction calculation circuit 62. Amount of each data,
The error due to the arc tread S'is corrected, and each corrected data is calculated by the high / low deviation calculating circuit 32 as in the conventional case, and the high / low deviation amount Δ with respect to the upright rail or the inclined rail is calculated.
H is calculated and output.

[0013]

As described above, in the method of measuring height deviation of the present invention, the horizontal displacement of the rail is
The vertical movement distance between the contact points of the rail tread and the arc tread of the traveling wheel is determined in advance and used as correction data, which corrects the errors due to the arc tread in the vertical displacements of the three rail points detected during running. Then, the amount of deviation of the left and right rails is accurately measured, and the correction data uses upright rails and inclined rails separately, and the selection means is disclosed. The effect that contributes to the accurate measurement of ups and downs is great.

[Brief description of drawings]

FIG. 1 is an explanatory diagram of correction data according to an embodiment of the present invention.

FIG. 2 is a basic configuration diagram of a correction processing unit in an embodiment of the present invention.

FIG. 3 is an explanatory view of the structure of the main part of the track inspection vehicle, the height deviation measuring device, etc., (a) is a side view of the track inspection vehicle, and (b) is its vertical view. A cross-sectional view, (c), is an explanatory diagram for measuring the height deviation.

FIG. 4 is a layout view of the deviation measuring device, (a) is a plan view of the orbit, (b) is a vertical sectional view thereof,
(c) is explanatory drawing about the measurement of the height deviation.

5A and 5B are explanatory diagrams of a traveling wheel on an arc tread, in which FIG. 5A is an explanatory diagram of a relationship between the traveling wheel and a rail, and FIG. 5B is an explanatory diagram of an arc tread.

FIG. 6 is an explanatory diagram of an error generated in the vertical displacement amount due to the arc tread surface, (a) is an explanatory diagram when the rail is at the reference position, and (b) and (c) are respectively, It is explanatory drawing when it is displaced.

[Explanation of symbols]

1, 1L, 1R ... rail, 2 ... track inspection vehicle, 21 ... vehicle body,
22A, 22B, 22C ... Bogie, 221 ... Traveling wheel, 222 ... Axle box, 3 ... Height deviation measuring device, 31 ... Vertical displacement detector, 32 ...
High / low deviation calculation circuit, 4 ... Travel distance calculation device, 41 ... Pulse oscillator, 42 ... Travel distance calculation circuit, 5 ... Displacement measurement device, 51 ... Left / right displacement detector, 52 ... Displacement calculation circuit, 6 ...
Correction processing unit, 61 ... A / D converter, 62 ... Correction arithmetic circuit, 63
... Address generation circuit, 64 ... Correction data table, 65 ... Distance data memory, S ... Straight tread, S '... Arc tread, F ...
Flange of traveling wheel, P ... Rail contact point, Q ... Arc tread contact point, Δd ... Rail horizontal displacement amount, Δh ... Traveling wheel vertical displacement amount. h ₁ ~h _n ... correction data.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Toyohiko Yamada Inventor Toyohiko Nakama-ku, Aichi Prefecture 1-4-1 Nakamura-ku, Tochi Passenger Railway Co., Ltd. (72) Inventor Shuichiro Kato Nakamura-ku, Nagoya City, Aichi Prefecture 1-4-1 Tokai Passenger Railway Co., Ltd. (72) Inventor Zendan Ueno 3-16-3, Shibuya-ku, Tokyo Inside Hitachi Electronics Engineering Co., Ltd.

Claims (2)

[Claims] 1. A track inspection vehicle having traveling wheels having arcuate treads that come into contact with the treads of rails, in advance, with respect to the treads of the rails and the running with respect to a lateral displacement of a proper pitch interval from a reference position of the rails. The vertical movement interval of the contact points on the circular arc tread of the wheel is obtained as correction data, and the correction data is stored in a memory table using the horizontal displacement amount as an address, and the left and right mounted on the three trucks of the track inspection vehicle. The displacement detector and the vertical displacement detector simultaneously detect the horizontal displacement amount and vertical displacement amount of three points of the two rails on the left and right while traveling, and the address of the horizontal displacement amount of the three points is detected for each detection. Read the corresponding correction data from the memory table,
Errors in the detected vertical displacements of the three points due to the arc treads are respectively corrected, and the corrected vertical displacement amount data are processed by a high / low deviation calculation circuit provided in the track inspection vehicle. A method for measuring the deviation of the height of a rail by means of an arc tread wheel, characterized in that the amount of deviation of the left and right rails is sequentially calculated. 2. The distance data from the running starting point of the track inspection vehicle in the upright section of the track in which the left and right rails are erected upright and in the inclined section in which the rails are installed upright are stored in a memory in advance. Set the correction data separately for the upright rail and the tilted rail, store the correction data in the memory table, and sequentially output the travel distance data from the travel distance calculation device equipped in the track inspection vehicle. The correction data of the upright section or the tilted section is selected according to to correct the error of the vertical displacement amount of the upright rail or the tilted rail due to the circular arc tread surface, respectively.
The method of measuring the deviation of the height of the rail with the arc-shaped tread wheel described.