JPH11142124A - Method and equipment for measuring sectional shape of rail - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain data for measuring a sectional shape of a rail while running at a high speed, and measure the sectional shape with high precision, by obtaining the imaging information of a measured part of the rail from an imaging means, and obtaining a directional vector of the rail from a directional vector measuring means. SOLUTION: On an imaging screen of a camera 15, an image of an outer shape of a measured part of a rail which is seen as a band of a light by irradiation of a plane light is imaged, and the band of the light has a width. When the measured part on the imaging screen of the camera 15 is recognized in the state that the light band has the width, measuring precision of coodinates, on a camera coodinate system, of the measured part of the rail is deteriorated. Luminance values of the respective pixels on the imaging screen of the camera 15 are detected, and a pixel having a peak value is extracted. By substituting coodinates, on the camera coodinate system, of the respective points on a rail section 14 into a specified formula, the coodinates on a space coodinate system, of the respective points of the measuring positions of the rail can be obtained. By projection on a plane rectagular to the direction vector of the rail, a sectional shape perpendicular to the longitudinal direction of the rail can be measured.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rail cross-sectional shape measuring method and a rail used for measuring abrasion of a rail for supporting and guiding wheels of a vehicle and maintaining the running of the vehicle in railway traffic and the like. The present invention relates to a device for measuring the cross-sectional shape of a rule.

[0002]

2. Description of the Related Art In railway traffic, as shown in FIG.
Since the iron wheels of the vehicle running on the rail contact the upper and inner sides of the rail, the upper and inner surfaces of the head of the rail are worn. The wear of the rail is such that the wear on the inner surface of the head progresses faster in a sharp curve section having a small curvature than in a straight section. Since such rail wear interferes with the safety of train operation, there is a need for a rail wear measuring device for measuring the state of rail wear. 2. Description of the Related Art Conventionally, a contact-type rail wear measuring device has been known as a rail wear measuring device. However, since this contact-type rail wear measuring device is mounted on a rail to measure the state of wear of the rail, it is necessary to carry the rail to a measurement location and attach it to the rail. Since a long time is required for one measurement, the number of measurement points is limited, and measurement accuracy is poor. Therefore, a non-contact type laser using laser light or the like is used.
A wear measuring device has been developed.

[0003]

This non-contact type rail wear measuring device can be attached to a measuring vehicle or the like, and can measure the wear of the rail while running the measuring vehicle or the like. To carry the rail wear measuring device,
No work on the rail is required, and the wear state of the rail can be accurately measured in a short time. However, conventional non-contact rail wear measuring devices are
If the relative position between the rail and a measuring device such as a light-emitting device or a light-receiving device changes from a predetermined relative position, the state of wear of the rail cannot be accurately measured. On the other hand, when the traveling speed of the measuring vehicle or the like is increased, rolling of the measuring vehicle or the like to the rail becomes severe due to rolling motion or yawing motion, and the relative movement between the measuring vehicle and the rail, ie, the measuring device and the rail. The position changes. For this reason, in order to suppress a change in the relative position between the measuring instrument and the rail, the measuring vehicle or the like has to run at a low speed of, for example, about 25 km / h or less.
The present invention has been made in order to solve such a problem, and obtains data for measuring a sectional shape of a rail for measuring abrasion of the rail while traveling at a high speed. And a rail cross-sectional shape measuring method capable of measuring the cross-section perpendicular to the longitudinal direction of the rail or the longitudinal cross-section of the rail with high accuracy based on the data. And a rail cross-sectional shape measuring apparatus.

[0004]

In order to solve the above-mentioned problems, according to the present invention, there is provided an imaging information of a measurement portion of a rail irradiated with plane light and a direction vector of the rail. A method of measuring the cross-sectional shape of a rail, which measures the cross-sectional shape of the measurement portion of the rail based on the above. According to the method for measuring the cross-sectional shape of a rail according to the first aspect, data for measuring the cross-sectional shape of the rail can be obtained while traveling at a high speed, and the data can be obtained based on the data. The cross-sectional shape of the rail measurement portion can be measured with high accuracy. According to a second aspect of the present invention, there is provided a light source for irradiating plane light to a measurement portion of a rail, and an imaging device for outputting imaging information of a measurement portion of the rail to which the plane light from the light source is irradiated Means, and direction vector measuring means for measuring a direction vector of the rail, wherein imaging information of a rail measurement portion from the imaging means and a ray from the direction vector measuring means are provided.
This is a rail cross-section shape measuring device for measuring the cross-sectional shape of the rail measurement portion based on the rail direction vector.
According to the rail cross-sectional shape measuring apparatus of the second aspect, a data for measuring the cross-sectional shape of the rail while traveling at high speed.
Data can be obtained, and the cross-sectional shape of the rail measurement portion can be measured with high accuracy based on this data. According to a third aspect of the present invention, there is provided a first light source for irradiating plane light to a measuring portion of the rail, and a measuring portion of the rail to which flat light from the first light source is irradiated. A first imaging means for outputting imaging information, a second light source for irradiating plane light to a reference portion of the rail, and a reference for a rail irradiated with plane light from the second light source. Second imaging means for outputting imaging information of a portion, measuring a direction vector of the rail based on imaging information of a reference portion of the rail from the second imaging means, and further comprising: For measuring the shape of a cross section perpendicular to the longitudinal direction of the rail of the measurement part of the rail based on the imaging information of the measurement part of the rail from the imaging means and the direction vector of the rail. This is a device for measuring the cross-sectional shape of a shell. By using the rail cross-sectional shape measuring device according to the third aspect, it is possible to obtain data for measuring the rail cross-sectional shape while traveling at high speed with a simple configuration, and to obtain the data. The shape of the cross section perpendicular to the longitudinal direction of the rail can be measured with high accuracy based on the data. According to a fourth aspect of the present invention, there is provided a first light source for irradiating plane light to a rail measurement part, and a rail measurement part for irradiating plane light from the first light source. A first imaging means for outputting imaging information, a second light source for irradiating plane light to a reference portion of the rail, and a reference for a rail irradiated with plane light from the second light source. A second imaging means for outputting imaging information of a portion, wherein the plurality of reference portions along the longitudinal direction of the rail outputted from the second imaging means are used for the plurality of reference portions. The direction vector of the rail is measured, and further, the image information of a plurality of measurement portions along the longitudinal direction of the rail and the direction vector of the rail at the plurality of positions are output from the first imaging means. A rail for measuring the shape of the section of the rail in the longitudinal direction of the measuring portion of the rail based on the Le sectional shape measuring device. According to the rail cross-sectional shape measuring device of the fourth aspect, a data for measuring the cross-sectional shape of the rail while traveling at a high speed with a simple configuration.
Data, and the shape of the rail in the longitudinal direction can be measured with high accuracy based on this data. According to a fifth aspect of the present invention, in the rail sectional shape measuring apparatus according to the third or fourth aspect, two reference portions of the rail are irradiated with plane light as the second light source. A light source which emits image information of each reference portion of the rail irradiated with the plane light of the rail from the second image pickup means as the second image pickup means; The coordinates of the reference points of each reference portion of the rail are measured based on the imaging information from the second imaging means, and the direction vectors of the plurality of rails are determined based on the coordinates of the reference points of each reference portion. Is measured. By using the rail sectional shape measuring apparatus according to the fifth aspect, the rail direction vector can be easily measured. According to a sixth aspect of the present invention, there is provided a first light source for irradiating plane light to a rail measurement portion, and a rail measurement portion for irradiating plane light from the first light source. A first imaging means for outputting imaging information, a second light source for irradiating plane light to a reference portion of the rail, and a reference for a rail irradiated with plane light from the second light source. Rail cross-sectional shape measurement data comprising second imaging means for outputting imaging information of a portion, and storage means for storing imaging information from the first imaging means and the second imaging means. It is a measuring device. The laser according to claim 6.
By using the data measuring device for measuring the sectional shape of the rail, it is possible to measure the data for measuring the sectional shape of the rail while traveling at high speed with a simple structure.

[0005]

Embodiments of the present invention will be described below with reference to the drawings. In the present invention, plane light is irradiated on the measurement portion of the measurement object, the measurement portion of the measurement object irradiated with the plane light is imaged by the imaging means, and the outer shape of the measurement portion of the measurement portion is defined as light band information. Then, a light-section method is used for measuring the cross-sectional shape of the measurement portion of the measurement object based on the information of the light band. The light sectioning method is described in detail in Seiji Iguchi and Kosuke Sato, "Three-dimensional image measurement" published by Shokodo Co., Ltd., and the like. The outline of the light cutting method will be described with reference to FIG. In the light cutting method, a light source that irradiates plane light, such as a light source that irradiates laser light by scanning the plane with a galvanomirror, a light source that irradiates laser light through a linear slit, and a plane from the light source Imaging means such as a CCD camera for imaging a measurement portion of a measurement object irradiated with light (hereinafter, referred to as a CCD camera)
A “camera” is provided as a measuring device, and parameters (hereinafter, “camera”) relating imaging information of a measurement portion of the measurement object from the camera, a spatial coordinate system of the measurement object and a camera coordinate system on an imaging screen of the camera. The cross-sectional shape of the measurement portion of the measurement object is measured based on the position of the plane light from the light source on the spatial coordinate system (hereinafter, referred to as “light source parameter”).

Now, the coordinates on the spatial coordinate system are (X, Y,
When the point on the measurement object of Z) is imaged on the imaging screen of the camera, that is, the point on the camera coordinate system at the point (Xc, Yc), the point on the spatial coordinate system is as follows. It can be converted to a point on the camera coordinate system using the camera parameters C11 to C34.

(Equation 1) Here, C11 to C34 include the position, posture,
Information about the camera such as the angle of view is included. The camera parameters C11 to C34 can be obtained by imaging a reference object having a known three-dimensional shape with a camera. For example, as shown in FIG. 2, a camera captures a reference object such as a cube in which the coordinates of each point on the space coordinate system are known in advance, and the coordinates of the reference points A to G of the reference object on the space coordinate system ( X, Y, Z) and reference points A ′ to
When the coordinates (Xc, Yc) of G ′ on the camera coordinate system are obtained, (Equation 1) holds. (C11-C31Xc) X + (C12-C32Xc) Y + (C13-C33Xc) Z = C34Xc-C14 (C21-C31Yc) X + (C22-C32Yc) Y + (C23-C33Yc) Z = C34Yc-C24 (Equation 1) In order to obtain twelve camera parameters C11 to C34, it is sufficient to find at least six pairs of reference points on the reference object and reference points on the imaging screen. Note that 6
Accuracy can be improved by obtaining camera parameters for the reference points above the pair and determining the camera parameters using the least squares method.

Further, the position of the light source on the spatial coordinate system is specified by an equation on the spatial coordinate system of the plane of the measuring object cut by the plane light emitted from the light source, ie, the plane light emitted from the light source. be able to. Assuming that the coordinates of the point on the cutting plane on the spatial coordinate system are (x, y, z), the equation of the cutting plane can be expressed by (Equation 2). ax + by + cz = d (Equation 2) Here, a, b, and c are light source parameters, and include information on the position of the light source on the spatial coordinate system. Also,
d is an arbitrary constant. These light source parameters a, b, c
Can be determined by irradiating a reference object having a known three-dimensional shape with plane light from a light source. For example, as shown in FIG. 2, a reference object such as a cube in which the coordinates of each point on a spatial coordinate system are known in advance is irradiated with plane light from a light source, and the cut surface N of the reference object cut by the plane light is irradiated. The upper reference point, for example, the coordinates (X,
When (Y, Z) is obtained and substituted into (Equation 2), (Equation 3) can be obtained. aX + bY + cZ = d (Equation 3) Therefore, in order to obtain the light source parameters a to c,
It is sufficient that at least the coordinates of the three reference points on the cut surface N of the reference object are known. If the light source parameters are obtained for three or more reference points on the cut surface of the reference object, and the light source parameters are determined using the least square method, the accuracy can be improved.

Using the camera parameters C11 to C34 and the light source parameters a to c obtained as described above,
As shown in the equation, the coordinates (X, Y) of the point on the cut surface of the measurement object cut by the plane light from the light source, that is, the point on the measurement portion of the measurement object irradiated with the plane light, , Z) are the coordinates (X
c, Yc).

(Equation 2) Therefore, if the camera parameters and the light source parameters are known, the coordinates of the measurement portion of the measurement object irradiated with the plane light from the light source, that is, the coordinates of each point of the light band portion on the camera coordinate system. The coordinates of each point of the measurement portion of the measurement object on the space coordinate system can be obtained based on the coordinates, and the cross-sectional shape of the measurement portion of the measurement object can be measured based on the obtained coordinates of the point on the space coordinate system.

Next, referring to FIGS. 3 and 4, there is shown a schematic diagram of an embodiment of a rail sectional shape measuring apparatus of the present invention for measuring the sectional shape of the rail by using the above-mentioned light cutting method. Will be explained. FIG. 3 is a plan view of a measuring vehicle and the like, and FIG. 4 is a side view of FIG. 3 and 4,
On a vehicle 10 such as a measuring vehicle, wheels 1 rolling on rails 1
1 and a base 12 to which each means for measuring the cross-sectional shape of the rail 1 is provided via a buffer member such as a vibration-proof rubber. The base 12 has a light source 14 for irradiating plane light to a measurement portion such as an upper surface and an inner surface of the head of the rail 1 where wear occurs, and a rail 1 for irradiating plane light from the light source 14. Imaging means 15, such as a CCD camera, for outputting imaging information of the measurement portion of
Light sources 16 and 17 for irradiating two reference portions on the outer side surface of the head with plane light, and imaging information of two reference portions of the rail 1 where the plane light from the light sources 16 and 17 are irradiated. An imaging unit 18 such as a CCD camera for outputting is provided.
The vehicle 10 and the base 12 are irradiated with the plane light from the light sources 14, 16 and 17 onto the rail 1, and the cameras 15 and 18 measure the measurement part and the reference part of the rail 1 irradiated with the plane light. An opening is formed so that an image can be taken. Base 1
2 may be provided at the lower part of the vehicle, or the light sources 14, 16, 1
7. The cameras 15, 18 may be provided directly below the vehicle 10. In addition, storage means for storing imaging information of the measurement part and the reference part of the rail 1 from the cameras 15 and 18 and imaging information of the measurement part and the reference part, camera parameters, light source parameters, etc. Processing means such as a computer for measuring the sectional shape of the measurement portion of the rail 1 is provided.
This processing means may be provided on the vehicle or on the ground. Further, the processing means may be constituted by hardware or software. The measurement of the cross-sectional shape of the rail measurement part by the processing means may be performed simultaneously by supplying the imaging information of the measurement part and the reference part of the rail 1 from the cameras 15 and 18 to the processing means. ,
The imaging information of the measurement part and the reference part of the rail 1 from the cameras 15 and 18 may be temporarily stored in the storage means, and the imaging information stored in the storage means may be supplied to the processing means later. Further, as a method of supplying the imaging information to the processing means, either a wired line or a wireless line may be used.

The light source 14 and the camera 15 are installed as shown in FIG. That is, the light source 14 is installed at a position where a plane light can be irradiated on a measurement part where wear occurs, for example, the upper surface and the inner surface of the head of the rail. Further, the camera 15 is installed at a position where a measurement portion of the rail irradiated with the plane light from the light source 14, that is, a portion irradiated with the plane light and seen as a light band can be imaged. Here, camera 1
On the imaging screen 5, an image of the outer shape of the measurement part of the rail, which is seen as a band of light due to the irradiation of the plane light, and an image of another part of the rail not irradiated with the plane light are taken. And the band of light has a width. When the measurement portion on the imaging screen of the camera 15 is recognized in a state where the band of light has a width, the measurement accuracy of the coordinates of the measurement portion of the rail on the camera coordinate system, and thus the spatial coordinates of the measurement portion of the rail. The measurement accuracy of the coordinates on the system decreases. Therefore, the luminance value of each pixel on the imaging screen of the camera 15 is detected, and the pixel having the peak value is extracted. Each point of the measurement portion of the rail thus extracted is represented as a narrow rail cross section 14, as shown in FIG. 6a. The processing for extracting the imaging information of the rail measurement part from the imaging screen of the camera 15 may be performed by a dedicated processing means or by the processing means for measuring the cross-sectional shape of the rail measurement part. Or camera 1
5 may be performed. By substituting the imaging information of the rail measurement portion, that is, the coordinates of each point on the rail section 14 on the camera coordinate system into (Equation 4), the spatial coordinates of each point of the rail measurement portion are obtained. The coordinates on the system can be obtained. Ray
Each point of the measurement part of the rail is represented in the spatial coordinate system as a rail cross section shown in FIG. 6b. And the ray on the spatial coordinate system
By projecting each point of the measurement part of the rail on a plane perpendicular to the longitudinal direction of the rail, that is, on a plane perpendicular to the direction vector of the rail, the length of the rail of the measurement part of the rail is projected. The shape of the cross section perpendicular to the direction can be measured. The projection plane need not be strictly perpendicular to the longitudinal direction of the rail.

While the vehicle is running, the center axis of the vehicle is shifted from the center axis of the vehicle by a rolling motion or a yawing motion of the vehicle.
Relative displacement from the direction of the rail, that is, a relative displacement between the position of the measuring device such as a light source and a camera on the spatial coordinates and the direction vector of the rail on the spatial coordinate system occurs. The rail direction vector above, and thus the coordinates of the plane perpendicular to the rail direction vector, also changes. For this reason, in order to accurately measure the shape of the cross section perpendicular to the longitudinal direction of the rail at the rail measurement portion, a plane perpendicular to the rail direction vector is specified on spatial coordinates and specified. It is necessary to project each point of the rail measurement part on the spatial coordinate system on a plane. Light sources 16, 17 and a camera 18 are provided to identify a plane perpendicular to the rail direction vector by measuring the rail direction vector on the spatial coordinate system. Light sources 16, 17, camera 18
Are installed as shown in FIG. That is, the light source 16,
Reference numeral 17 is provided at a position where plane light can be applied to two reference portions, which are relatively resistant to oil stains, hardly worn, and easy to extract a reference point. In this embodiment, the outer surface of the head of the rail is selected as the reference plane, and the intersection e of the head and the leg of the rail outside the rail as shown in FIG. 1 is selected as the reference point. did. The camera 18 is connected to the light source 1.
The reference portion of the rail irradiated with the plane light from 6 and 17, that is, the portion irradiated with the plane light and seen as a band of light is set at a position where the image can be taken.

Then, a luminance value of each pixel on the image pickup screen of the camera 18 is detected, and a pixel having a peak value is extracted.
Each point of the reference portion of the rail extracted in this manner is represented as a narrow rail cross section 16, 17 as shown in FIG. The processing for extracting the imaging information of the reference portion of the rail from the imaging screen of the camera 18 may be performed by a dedicated processing means, or may be performed by the processing means for measuring the cross-sectional shape of the immediate knowledge part of the rail. It may be performed, or may be performed in the camera 18. The coordinates on the camera coordinate system of the reference points f and g on the rail sections 16 and 17 corresponding to the reference point e of the reference portion of the rail, ie, the reference point e shown in FIG. By substituting, the coordinates of the reference point of the reference portion of the rail on the space coordinate system are obtained, and by connecting the reference points f and g, the direction vector of the rail on the space coordinate system is obtained. Reference points f, g
In order to detect the coordinates on the camera coordinate system, for example, the light sources 16, 17 and the camera 18 are installed so that the rail cross sections 16, 17 on the imaging screen are arranged as shown in FIG. The point which scans in the axial direction and intersects with the rail cross section for the first time is recognized as the reference point f, and the coordinates on the camera coordinate system are detected. Is recognized as the reference point g, and the coordinates on the camera coordinate system are detected. Note that one light source that irradiates plane light to two reference portions of the rail may be used, or imaging information of the two reference portions of the rail to which plane light is radiated may be output. Two cameras may be used.

By projecting each point of the measured portion of the rail on the spatial coordinate system on a plane perpendicular to the direction vector of the rail on the spatial coordinate system measured as described above, The shape of the cross section perpendicular to the longitudinal direction of the rail of the measuring portion can be accurately measured. As a method of projecting each point of the rail measurement portion on a plane perpendicular to the rail direction vector, a straight line parallel to the rail direction vector can be projected from each point of the rail measurement portion. Then, the intersection of this straight line and a plane perpendicular to the rail direction vector is determined.

Next, a description will be given of a process of measuring the wear of the rail based on the shape of the section of the rail measured as described above, which is perpendicular to the longitudinal direction of the rail. First, light sources 14, 16, 17, cameras 15, 18 and storage means are provided in a measuring vehicle or the like, and imaging information and rails of a rail measurement portion from the cameras 15 and 18 while running the measuring vehicle or the like. Is stored in the storage means. At this time, position information indicating which position on the rail the image pickup information is, such as movement information of a measuring vehicle or the like for every predetermined traveling distance or absolute position information with respect to the starting point, is stored in the storage means together with the image pickup information. Remember. After the measurement part and the reference part are imaged, the storage means is connected to a processing means provided at a monitoring station or the like on the ground. The imaging information of the rail measurement part and the imaging information of the rail reference part from the cameras 15 and 18 may be directly supplied to the processing means. In order to measure the state of wear of the rail at any point in the length direction of the rail, for example, at a plurality of points j to n along the longitudinal direction of the rail shown in FIG. The imaging information of the measurement part and the reference part of the rail at the points j to n are read out from the storage means, and based on the read out imaging information of the measurement part and the reference part of the rail, camera parameters, light source parameters, and the like. Then, the shape of the cross section perpendicular to the longitudinal direction of the rail at each of the points j to n is measured by the method described above. The cross-sectional shape perpendicular to the longitudinal direction of the rail at each point j to n measured in this way, that is, the cross-sectional shape of the rail viewed from the direction of arrow Q in FIG. For example, FIG.
Output in the form shown in FIG. This makes it possible to determine the state of wear of the rail at each location. It is also possible to output only the cross-sectional shape of the rail at an arbitrary point along the length of the rail.

Further, an arbitrary point on the cross section perpendicular to the longitudinal direction of the rail, for example, a predetermined distance or distance from the reference point e shown in FIG. 1 in the sectional direction perpendicular to the longitudinal direction of the rail. When measuring the state of wear in the longitudinal direction of the rail (referred to as wavy wear) at a point located at a predetermined angle in the cross-sectional direction perpendicular to the longitudinal direction of the rail, the processing means is indicated by an arrow in FIG. The coordinates of a point at a predetermined distance or a predetermined angle from a reference point e on a cross section perpendicular to the longitudinal direction of the rail at a plurality of locations j to n are detected. Then, these points are connected by a straight line and output to a display means, a printer, or the like, for example, in the form shown in FIG. 9C. This makes it possible to measure the wavy wear state viewed from the direction of arrow R in FIG. 9A.
When the reference point e shown in FIG. 1 is set to a zero point on a plane perpendicular to the direction vector of the rail, the longitudinal length of the rail at a predetermined distance from or at a predetermined angle from the reference point e is determined. It is easy to determine a point on a cross section perpendicular to the direction. Also,
By shortening the interval between the points j to n, it is possible to more accurately determine the wavy wear state in the rail length direction.

When the wear state of the rail is output in the form shown in FIGS. 9B and 9C, it is difficult to determine whether or not the amount of wear of the rail has reached a reference value. Therefore,
When outputting the shape of the cross section perpendicular to the longitudinal direction of the rail shown in FIGS. 9b and 9c (cross-sectional wear state) and the cross-sectional shape of the rail in the nominal direction (wavy wear state), When the reference cross-sectional shape of the rail indicating the state of wear to be replaced and the reference wear level of the rail are output together, it is easy to determine whether the amount of wear of the rail has reached the reference value. Can be.
Further, if the processing means determines whether or not the rail wear amount has reached the reference value, it is not necessary to determine whether or not the rail wear amount has reached the reference value. This process is performed, for example, by determining whether or not the wear is worn by a predetermined dimension in a direction perpendicular to the tangent to the reference rail cross-sectional shape in a state where there is no wear. Alternatively, as shown in FIG. 10, a reference rail cross-sectional shape in a state where the reference rail cross-sectional shape is worn by a reference value with respect to the reference rail cross-sectional shape is obtained in advance, and the measured rail cross-sectional shape is used as the reference rail cross-sectional shape. This is performed by determining whether or not they intersect with the shape.

In the above embodiment, the light sources 16, 17,
Although the rail direction vector is measured using the camera 18 and the like, the rail direction vector can be measured using various other means and methods. Although the rail direction vector is measured based on the coordinates of the reference points of the two reference portions of the rail, the rail direction vector is measured based on the imaging information of one reference portion. You can also.
Further, a light source 1 for obtaining imaging information of a rail measurement portion.
4, a camera 15, light sources 16, 17 for obtaining imaging information of a reference portion of the rail, a camera 18, and processing means,
In some cases, the rail cross-section shape measuring device is configured including the storage means. However, the light source 14, the camera 15, and the imaging information of the reference portion of the rail are used to obtain the imaging information of the rail measurement portion. It can also be configured as a rail cross-section shape measurement data measuring device for measuring rail cross-section shape measurement data by the light sources 16, 17, the camera 18, the storage means and the like. In addition, a light source for irradiating plane light and a camera for capturing an image of a portion irradiated with plane light are provided for each of the rail measurement part and the reference part. However, a common light source or a common camera is used. The number of light sources and cameras, the installation positions, and the like can be variously changed. Although the present invention is used for measuring the state of wear of the rail, the present invention can be used for purposes other than the measurement of the state of wear of the rail.

[0018]

As described above, the rail cross-sectional shape measuring method according to the first aspect and the rail cross-sectional shape measuring apparatus according to the second aspect use the rail while traveling at high speed. −
It is possible to obtain data for measuring the sectional shape of the rail, and to measure the sectional shape of the rail with high accuracy based on the data. The laser according to claim 3.
By using the device for measuring the cross-sectional shape of a rail, it is possible to obtain data for measuring the cross-sectional shape of the rail while traveling at a high speed with a simple configuration, and to obtain a rail with high accuracy based on this data. The shape of the cross section perpendicular to the longitudinal direction of the rule can be measured. In addition, by using the rail cross-sectional shape measuring device according to the fourth aspect, it is possible to obtain data for measuring the rail cross-sectional shape while traveling at high speed with a simple configuration. The profile of the rail in the longitudinal direction can be measured with high accuracy based on the data. Claim 5
The rail direction vector can be easily measured by using the rail sectional shape measuring device described in (1). Also,
According to the data measuring device for measuring a sectional shape of a rail according to the sixth aspect, the rail can be moved at a high speed with a simple structure.
Can be used to measure the data for measuring the sectional shape of the tool.

[Brief description of the drawings]

FIG. 1 is a view showing a worn state of a rail.

FIG. 2 is a diagram for explaining a method for obtaining a light source parameter and a camera parameter.

FIG. 3 is a diagram showing a state where a light source and a camera are attached to a vehicle.

FIG. 4 is a view of FIG. 3 as viewed from an arrow P direction.

FIG. 5 is a layout diagram of measuring equipment for obtaining imaging information of a rail measurement part.

FIG. 6 is a diagram showing imaging information and a cross-sectional shape of a measurement portion of the rail.

FIG. 7 is a layout diagram of measuring instruments for obtaining imaging information of a reference portion of the rail.

FIG. 8 is a diagram showing imaging information of a reference portion of the rail.

FIG. 9 is a diagram showing a cross-sectional shape of a plurality of measurement portions in a longitudinal direction of the rail.

FIG. 10 is a diagram for explaining a process of determining a worn state of the rail.

[Explanation of symbols]

 1 rail 10 vehicle 12 base 14, 15, 16 light source 15, 16, 17 camera (imaging means)

Claims (6)

[Claims] 1. A rail for measuring a cross-sectional shape of a measurement portion of a rail based on imaging information of a measurement portion of the rail irradiated with plane light and a direction vector of the rail. Cross section shape measurement method. 2. A light source for irradiating plane light to a measurement part of the rail, an imaging means for outputting imaging information of a measurement part of the rail to which the plane light from the light source is irradiated, and the rail. Direction vector measuring means for measuring a direction vector of the rail, and the rail based on image information of a rail measurement portion from the image capturing means and a direction vector of the rail from the direction vector measuring means. A rail cross-section shape measuring device for measuring the cross-sectional shape of the measuring portion. 3. A first light source for irradiating plane light to a measurement portion of the rail, and a second light source for outputting imaging information of the measurement portion of the rail to which the plane light from the first light source is irradiated. A second imaging means for irradiating plane light to a reference portion of the rail;
A light source, and second imaging means for outputting imaging information of a reference portion of the rail irradiated with the plane light from the second light source, and the rail from the second imaging means. The direction vector of the rail is measured based on the imaging information of the reference portion, and the rail is further measured based on the imaging information of the measurement portion of the rail from the first imaging means and the direction vector of the rail. A rail cross-section shape measuring device for measuring the cross-sectional shape of the rail at the section perpendicular to the longitudinal direction of the rail; 4. A first light source for irradiating plane light to a measurement part of the rail, and a second light source for outputting imaging information of the measurement part of the rail to which the plane light from the first light source is irradiated. A second imaging means for irradiating plane light to a reference portion of the rail;
Light source, and second imaging means for outputting imaging information of a reference portion of the rail irradiated with the plane light from the second light source, and the laser output from the second imaging means. Measuring direction vectors of the plurality of rails based on imaging information of a plurality of reference portions along the longitudinal direction of the rail,
Further, based on the imaging information of a plurality of measurement portions along the longitudinal direction of the rail output from the first imaging means and the direction vector of the rail at the plurality of portions, the measurement portion of the rail is measured. A rail cross-section shape measuring device for measuring the cross-sectional shape of a rail in the longitudinal direction. 5. A light source for irradiating plane light to two reference portions of the rail as the second light source,
The imaging means for outputting the imaging information of each reference portion of the rail irradiated with the plane light of the rail from the second imaging means, and the imaging from the second imaging means. 5. The method according to claim 3, wherein coordinates of reference points of each reference portion of the rail are measured based on the information, and direction vectors of the plurality of rails are measured based on coordinates of reference points of each reference portion. 2. A rail cross-section shape measuring apparatus according to claim 1. 6. A first light source for irradiating plane light to a measurement portion of the rail, and a second light source for outputting imaging information of the measurement portion of the rail to which the plane light from the first light source is irradiated. A second imaging means for irradiating plane light to a reference portion of the rail;
Light source, second image pickup means for outputting image pickup information of a reference portion of the rail irradiated with the plane light from the second light source, the first image pickup means and the second image pickup means A data measuring device for measuring the cross-sectional shape of a rail, comprising: storage means for storing imaging information from the rail.