JP3361883B2 - Long rail telescopic seam inspection system - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an inspection device for expansion / contraction seams of long rails.

[0002]

2. Description of the Related Art In major railway lines such as the Shinkansen, long rails are used to avoid shocks due to rail joints and to make traveling easier, and long rails are made by welding short rails locally. For example, the length is 1 km. Expansion joints are provided between both ends of each long rail in order to absorb expansion and contraction due to temperature change of the long rails.
The length of the expansion joint is several meters. FIG. 6 is a plan view of a track composed of long rails. The left and right long rails 1L and 1R laid on the sleeper 2 and the long rail 1 following this.
Expansion joints 3 are respectively provided between L ′ and 1R ′.
The expansion joint 3 comprises a receiving rail 32 and a tongue rail 31 fixed to the ends of the rail 1 and the rail 1 ', respectively.

FIG. 7 is a plan view and a sectional view showing the details of the long rails 1, 1'on one side and the expansion and contraction seam 3 for them.
The AA cross section shows the portion of the long rail 1, and the long rail 1 is bolted with the floor plate 41 of the fastener 4 and the spring plate 42 interposed.
It is fastened to the sleeper 2 by 43. B-B cross section is expansion joint 3
The middle portion of the tongue rail 31 is formed to have a narrow lateral width, and the side surface of the receiving rail 32 is cut against this, and a pressing tool 44 is added to the fastener 4 to press the receiving rail 32. Are in contact with each other as shown. C-C
The cross section shows the end of the expansion and contraction seam 3, the head of the tongue rail 31 has a width almost close to that of the long rail 1, and the respective slopes contact each other. Since the long rail 1, the receiving rail 32, and the tongue rail 31 fastened to the sleeper 2 are movable in the front-rear direction by the action of the spring plate 42 of the fastener 4,
The expansion and contraction of both long rails 1 and 1'can be absorbed. This absorbing action will be described with reference to FIG.

FIG. 8 (a) shows a case where both the long rails 1 and 1'are not expanded and contracted, and the tip P of the tongue rail 31 is shown.
Is located at a boundary point s between the receiving rail 32 and the long rail 1, and the side surfaces 1a and 31a of the heads of the long rail 1 and the tongue rail 31 form a straight line L. On the other hand, (b) is a case where both or one of the long rails 1 and 1'extends, the tongue rail 31 moves to the left relative to the receiving rail 32, and the tip P of the tongue rail 31 moves toward the long rail. 1
Is the position of point r. However, in this state, the side surface 31a of the tongue rail 31 is displaced inward from the straight line L by g _r . Further, (c) shows the case where the long rails 1 and 1'are contracted, the tip P of the tongue rail 31 is located at the point t of the receiving rail 32, and the side surface 31a thereof is displaced outward from the straight line L by g _t. . An allowable value is set for such inward or outward displacements g _r , g _t of the tongue rail 31, and the displacement amounts g _r , g _t of the respective tongue rails 31 are measured by the inspection personnel's patrol. , When it exceeds this compared with the allowable value, the relevant expansion / contraction seam 3
Is considered abnormal or defective and has been reworked. The permissible values for the displacements g _r , g _t are three positions at the front end p, the middle part and the rear end of the tongue rail 31 (Fig. 4 (b)).
(Shown in FIG. 2) is specified with an accuracy of mm or less.

[0005]

The measurement of the displacement amounts g _r , g _t of the tongue rails 31 by the above-mentioned inspection by the inspector and the comparison with the allowable values are considerably difficult operations and require a long time. On the other hand, there is a demand for an efficient inspection device capable of quickly and accurately measuring the amount of displacement of each tongue rail 31 and determining an abnormality in the expansion joint. On the other hand, for displacement of normal rails or long rails, track inspection vehicles have been conventionally used for inspection, and if an inspection device is installed in this inspection vehicle, expansion and contraction seams can be quickly performed while traveling. Can be inspected. However, it is considered efficient that the inspection apparatus mounts only the measuring unit on the track inspection vehicle, measures the image of the expansion / contraction seam 3, and processes the measurement data on the ground to determine the abnormality of the expansion / contraction seam. The present invention has been made based on the above idea, and an inspection device which is mounted on a track inspection vehicle to measure an image of an expansion joint during traveling and processes the measured data on the ground to determine an abnormality of the expansion joint is provided. The purpose is to provide.

[0006]

SUMMARY OF THE INVENTION The present invention is a telescopic joint inspection device for long rails, which is mounted on a track inspection vehicle, and which is arranged in a track cross-sectional direction with respect to the treads of the telescopic joints of the left and right long rails. None, a projection unit that projects a light band with a strong light intensity that can resist external light in the vertical direction, and the optical axis is set to an oblique direction, and the slit removes the reflected light from parts other than the tread surface of the light band, and the tread surface Part of the long rails before and after, based on two sets of measurement optical systems, one set including a light receiving unit that receives the reflected light of the, and the light receiving signals that are sequentially output by each light receiving unit when the track inspection vehicle travels. The contour line synthesizing unit for synthesizing the image of the contour line of each tread including, and recording the image signal and the traveling position data sequentially supplied from the track inspection vehicle. It has a VTR. Also, a contour line image is reproduced from each image signal recorded on the VTR provided on the ground and analyzed, and the displacement amount of the tongue rail with respect to the receiving rail of each expansion and contraction seam is calculated, and this is a preset allowable value. When it exceeds, the expansion joint is determined to be abnormal, and the amount of displacement and the traveling position data read from the VTR are displayed on the display device. In the above, the contour line synthesizing unit has a microprocessor and a memory, stores in advance the distance data of each expansion and contraction joint on the track in the memory, and
A contour synthesis unit and a control unit for the VTR are provided. A microprocessor monitors the traveling position data sequentially supplied by the running of the track inspection vehicle, and when the traveling position data coincides with the kilometer data, the contour synthesizing unit and the VTR are operated by the control of the control unit. Is.

[0007]

In the above expansion joint inspection device, each of the light projecting portions of the two sets of measuring optical systems forms a light band having a strong luminous intensity capable of counteracting outside light with respect to the tread surface of each expansion joint of the left and right long rails. Each light receiving unit that projects in the vertical direction in the cross-sectional direction of the track and has the optical axis set to the oblique direction removes the reflected light other than the tread surface by the slit and receives only the reflected light of the tread surface. With these, both measurement optical systems can perform measurement with good S / N even in the daytime. When the track inspection vehicle runs, the light bands are sequentially reflected by the left and right long rails and the treads of the expansion and contraction joints, and are received by the respective light receiving parts. The image of the contour line of each tread including a part of the rail is synthesized, and the image signals sequentially output are recorded in the VTR together with the traveling position data. When the track inspection vehicle travels in a predetermined inspection section and the recording of each contour line image signal is completed, the VTR is connected to the ground device, and the contour line image is reproduced from each image signal recorded therein and analyzed. Then, the displacement amount of the tongue rail with respect to the receiving rail of each expansion joint is calculated. When the amount of displacement exceeds a preset allowable value, it is determined that the expansion / contraction seam is abnormal, and the amount of displacement and the traveling position data read from the VTR are displayed on the display, and the abnormality is detected by these. It is possible to take appropriate countermeasures against the expansion joints that have occurred.

[0008] In the above, by running the track inspection vehicle,
The traveling position data sequentially supplied from the track inspection car is monitored by the microprocessor, and when this coincides with the distance of the expansion / contraction seam stored in the memory in advance, the control unit operates the contour line synthesizing unit and the VTR. Then, the contour line synthesis and the image signal recording are performed on the expansion joint including a part of the long rail, and the operation is stopped at other points, so that the VTR recording data is greatly reduced and the ground signal is reduced. The analysis processing of the device is made efficient.

[0009]

1 to 5 show an embodiment of the present invention. FIG. 1 is a layout view of two sets of measuring optical systems 5L and 5R, and FIG.
In the partial view of (a) is a configuration diagram of the light emitter 51, and (b) is a light receiver 52.
3 is a block diagram of the contour synthesizing unit 6 and the control unit 8, FIG. 4A is an explanatory diagram of a scanning method of the light receiving unit with respect to the expansion / contraction seam 3, and FIG. 4B is a synthesized contour G FIG. 5 is a block diagram of the ground device 9.

In FIG. 1, two sets of measuring optical systems 5L and 5L are provided.
R has the same structure and is composed of a light emitting unit 51 and a light receiving unit 52. The right and left long rails 1 are provided at appropriate positions on both sides of the track inspection vehicle.
It is arranged corresponding to L and 1R. In FIG. 2 (a), the light projecting unit 51 is composed of a mercury lamp 511 and a cylindrical lens 512, and the luminous flux L _T of the mercury lamp 511 is focused by the cylindrical lens 512 into a strong optical band B, and the head of the expansion joint 3 is expanded. It is projected on the surface of the part (the tread) and its periphery in a direction perpendicular to the cross section of the track and in the vertical direction. However, what is projected on the periphery is distinguished as an optical band B ′ for convenience. In FIG. 2B, the light receiving section 52 is composed of an imaging lens 521, a slit plate 522, and a CCD linear sensor 523, and the optical axis is set to an appropriate inclination angle θ with respect to the X direction (rail direction). Reflected light L _R band of light B by the treads, is focused by the imaging lens 521 passes through the slits S _L of the slit plate 522 is accumulated is formed on the light receiving element d of the CCD linear sensor 523. However, the peripheral light band B ′ is blocked by the slit S _L and is not received by the CCD linear sensor 523. Since the strong light band B by the mercury lamp 511 and the light band B ′ by the slit S _L are removed, the reflected light L _T of the light band B has a good S / N ratio. It becomes possible to measure.

In FIG. 3, the contour line synthesizing unit 6 includes two signal processing circuits 61L and 61R and a contour line synthesizing circuit 62, respectively.
VTR 7 is connected to both contour line synthesis circuits 62L and 62R. The control unit 8 generates a scanning circuit 81 for the CCD linear sensor 523, each circuit of the contour line synthesizing unit 6, and a control circuit 82 for the VTR 7, a microprocessor (MPU) 83, a memory (MEM) 84, and traveling position data K. The MEM 84 stores the distance data about the leading and trailing ends of the left and right expansion joints 3 in advance in the MEM 84. As the traveling position data generator 85, the one already installed in the track inspection vehicle is used. In FIG. 5, the ground device 9 includes two sets of contour line analysis units 91L and 91R, an abnormality determination unit 92 and a display 93. The abnormality determination unit 92 includes a tongue rail 31 of the expansion joint 3.
The permissible values for the displacement amounts g (g ₁ , g ₂ , g _{3 in} FIG. 4B) at _three points are set in advance.

The procedure for inspecting the expansion / contraction seam 3 by the above inspecting apparatus will be described below with reference to FIGS. First, as described above, the reflected light L _R of the light band B projected by each light projecting unit 51 of both measurement optical systems 5L and 5R is the CCD linear sensor (hereinafter simply referred to as sensor) 523L of each light receiving unit 52. The light is accumulated in the light receiving element d of 523R, and these are stored in the scanning circuit 81 of the control unit 8.
To sequentially output the received light signals. The traveling position data K sequentially output by the traveling position data generator 85 is monitored by the MPU 83 when the track inspection vehicle travels, and any of the leading distance data K _ST of the expansion joint 3 stored in the MEM 84 is monitored. 4A, the MPU 83 gives the control circuit 82 a start signal K _ST shown in FIG.
Thereby, for example, the signal processing circuit 61L and the contour synthesizing circuit
62L and VTR7 start operating, and stop by the stop signal K _SP for the rear end kilometer data K _SP , and the light receiving signal of the expansion joint 3 including a part of the front and rear long rails 1, 1 ' The signal is input to the signal processing circuit 61L. In this case, the traveling speed of the track inspection vehicle and the scanning cycle of the scanning circuit 81 are
For example, if the speed is 130 km / h and 1 kHz, as shown in FIG. 4 (a), the long rail 1 and the expansion / contraction seam 3 are scanned by the scanning line S _P having a scanning interval δL of 36 mm. Scan interval 36
Since cm is about 1/200 of the length m of the expansion / contraction seam 3, the measurement resolution is sufficient. Each light reception signal input to the signal processing circuit 61L is subjected to noise processing and the like, and after the contour line image is synthesized by the contour line synthesizing circuit 62L, it is appropriately scaled in the rail direction and traveled with this image signal G _L. Position data K and VTR 7 are recorded in parallel. FIG. 4B illustrates the scaled contour line R. The above is the case of the expansion joint 3 on the left side, but in the case of the right side, the signal processing circuit 61R, the contour synthesizing circuit 62R, and the VTR 7 operate in the same manner as described above, and the image signal G _R is recorded.

When the track inspection vehicle travels in a predetermined inspection section and the recording of the image signals G _L , G _R for each expansion / contraction seam 3 is completed, the VTR is connected to a ground device and the recorded image signals G _L , G _L , G _R and the distance K data K are read out and the image signals G _L , G are read.
_R is the contour analysis units 91L and 91R, and is shown in FIG.
The image of the scaled outline R of is reproduced and analyzed. In the analysis, first, the straight line L for the head side surface 1a of the long rail 1 on the front side of the expansion joint 3 (left side in Fig. (B)) is obtained, and then the side surface 31a of the tongue rail 31 with respect to the straight line L.
The displacement amounts g ₁ , g ₂ and g ₃ at the _{three positions} are calculated. The data of the respective displacement amounts g ₁ , g ₂ , g ₃ are input to the abnormality determination unit 92 and compared with the respective reference values set therein, and when all the displacement amounts g are below the reference value, The expansion / contraction seam 3 is determined to be normal. When there is a displacement amount g that exceeds the reference value, it is determined that there is an abnormality, and the data of this displacement amount g and the data K for that distance are displayed on the display 93.

[0014]

As described above, in the expansion / contraction inspection device according to the present invention, the contour line image of the expansion / contraction seam during traveling is measured by the measuring optical system and the contour line combining section mounted on the track inspection vehicle. , Each image signal is recorded in the VTR together with the traveling position data, and in the ground equipment, each image recorded in the VTR is analyzed to calculate the displacement amount of the tongue rail of each expansion joint, and this is set as the allowable value. The presence or absence of an abnormality in the expansion joint is compared to determine if there is an abnormality, and if there is an abnormality, the displacement amount and traveling position data are displayed on the display.The measurement optical system is configured to enable daytime measurement. In addition, since contour line synthesis and image signal recording are performed only for expansion / contraction seams, the data recorded by the VTR is greatly reduced, and the analysis processing of the ground equipment is made more efficient. Xun to the seam , There is large to the effect of precise inspection.

[Brief description of drawings]

FIG. 1 is a layout view of two sets of measuring optical systems 5L and 5R in an embodiment of the present invention.

FIG. 2 is a partial view of FIG. 1, in which (a) is a configuration diagram of a light projecting unit 51 and (b) is a configuration diagram of a light receiving unit 52.

FIG. 3 is a block configuration diagram of a contour line synthesis unit 6 and a control unit 8.

FIG. 4 (a) is an explanatory view of a scanning method of the light receiving part with respect to the expansion / contraction seam 3, and FIG. 4 (b) is a combined and scaled contour line G.
An example of each is shown.

FIG. 5 shows a block diagram of a ground device 9.

FIG. 6 shows a plan view of a long rail track.

FIG. 7 shows a plan view and a sectional view of the expansion joint 3.

8A and 8B are explanatory views of the absorbing action of the expansion and contraction seam 3 with respect to expansion and contraction of the long rail. FIG. 8A is a case where there is no expansion, FIG. 8B is a case where it is expanded, and FIG. 8C is a case where it is expanded. Indicates the contracted case.

[Explanation of symbols]

1,1 '... long rail, 1L ... left long rail, 1
R ... right long rail 1a ... side of head of long rail, 2 ... sleeper, 3 ... expansion / contraction seam, 31 ... tonguerail, 31a ... side of head of tonguerail, 32 ... receiving rail, 4 ... fastener, 41 ... Floorboard, 42 ... Springboard, 43 ... Bolt, 44 ...
Pressing tool, 5L, 5R ... Measuring optical system, 51 ... Projector, 511 ...
Mercury lamp, 512 ... Cylindrical lens, 52 ... Light receiving part, 521 ... Imaging lens, 522 ... Slit plate, 523 ... CC
D linear sensor, 6 ... Contour line synthesis unit, 61L, 61R ... Signal processing circuit, 62L, 62R ... Contour line synthesis circuit 7 ... VTR, 8 ... Control unit, 81 ... Scan circuit, 82 ... Control circuit, 83 ... Microprocessor (MPU), 84 ... Memory (MEM), 85 ...
Travel position data generator, 9 ... ground device, 91L, 91R ... contour analysis unit, 92 ... abnormality determining unit, 93 ... indicator, the P ... tongue rail tip, L ... straight, g, g _r, g _t ... Tongue rail displacement amount, L _T ... Luminous flux, B, B ′ ... Optical band, L _R ... Reflected light, θ ... Inclination angle, S _L
... slit, d ... light receiving element of CCD linear sensor, G _L ,
G _R ... image signals, K ... travel position data, K _ST ... start signal, K _SP ... stop signal, S _P ... scanning line, [delta] L ... scan spacing.

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Toyohiko Yamada, Inventor Toyo Passenger Railway Co., Ltd. 1-4-1, Mei Station, Nakamura-ku, Nagoya-shi, Aichi (72) Inventor, Yasuo Takenaka, 2-chome, Otemachi, Chiyoda-ku, Tokyo No. 2 Hitachi Electronics Engineering Co., Ltd. (72) Inventor Takao Yoshizawa 2-6, Otemachi, Chiyoda-ku, Tokyo No. 2 Hitachi Electronics Engineering Co., Ltd. (72) Ryoichi Tamura 2-6, Otemachi, Chiyoda-ku, Tokyo No. 2 within Hitachi Electronics Engineering Co., Ltd. (72) Inventor Tetsuro Hirai 2-6-2 Otemachi, Chiyoda-ku, Tokyo Inside Hitachi Electronics Engineering Co., Ltd. (56) Reference JP-A-6-88711 (JP, A) JP-A-4-86511 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) G01N 21/84-21/958 G01B 11/00-11/30

Claims (2)

(57) [Claims] 1. A track formed by sequentially connecting both ends of a long rail fastened to the left and right on a sleeper with expansion joints composed of a tongue rail and a receiving rail, each of which is mounted on a track inspection vehicle. With respect to the treads of the expansion and contraction joints of the left and right long rails, there is no track cross-section direction, a light projecting unit that projects a light band of strong luminous intensity in the vertical direction that can resist external light, and an optical axis is set in an oblique direction. By using the slit to remove the reflected light from the portion other than the tread surface of the light band, and two sets of measurement optical systems including a light receiving portion for receiving the reflected light of the tread surface, and by running the track inspection vehicle. A contour line synthesizing unit for sequentially outputting image signals by synthesizing images of the contour lines of the treads including a part of the front and rear long rails from the light receiving signals sequentially output by the light receiving units, and , The respective image signals, and It is equipped with a VTR for recording the traveling position data sequentially supplied from the road inspection vehicle, is provided on the ground, and reproduces and analyzes a contour line image from each image signal recorded in the VTR, The displacement amount of the tongue rail with respect to the receiving rail of each expansion and contraction seam is calculated, and when the calculated displacement amount exceeds an allowable value compared with a preset reference value, it is determined that the expansion and contraction seam is abnormal, A stretchable joint inspection device for long rails, comprising: a ground device that displays the displacement amount and traveling position data read from the VTR on a display. 2. The contour line synthesizing unit has a microprocessor and a memory, stores the distance data of each expansion / contraction seam on the track in advance in the memory, and the contour line synthesizing unit. And a control unit for the VTR is provided, the traveling position data sequentially supplied by the traveling of the track inspection vehicle is monitored by the microprocessor, and when the traveling position data matches the distance data, The expansion / contraction seam inspection device for a long rail according to claim 1, wherein the contour synthesizing unit and the VTR are operated under the control of a control unit.