JP5179995B2 - Method and apparatus for measuring track dimensions of track rail - Google Patents

Description

  TECHNICAL FIELD The present invention relates to a track rail management dimension measuring method and a track rail management dimension measuring apparatus.

  Railway operators regularly measure various management dimensions of the left and right rails on the track to reduce the uncomfortable feeling of passengers and passengers, and perform maintenance as necessary. Management dimensions to be managed include trajectory displacement, the amount of expansion and contraction of the long rail, and the amount of advancement. Track displacement (also known as track misalignment or track irregularity) includes the distance between the left and right rails, the “level displacement” that is the difference between the heights of the left and right rails, and the position of the rail in the longitudinal direction of the rail. There are “high-low displacement” which is displacement in the vertical direction, “street displacement” which is displacement in the left-right direction of the rail at a position in the longitudinal direction of the rail, and the like. The forward movement means that the rail moves in the longitudinal direction, and the traveling state of the train, the fastening state of the rail, and the like are associated with each other. Long rails generally have a length of 200 meters or more, and measuring the amount of advance is important for preventing buckling deformation. For this reason, the amount of advance is measured at each of the measurement positions set at a plurality of locations (for example, 3 or 5 points) for each long rail.

As a method of measuring the control dimensions of the rail, for example, the amount of advancement, the water thread method is well known, but it must be performed manually by field workers at a number of measurement positions over the entire length of the track. The work is very complicated. For this reason, a measuring apparatus for measuring the amount of progress has been proposed (see Patent Document 1). The measuring device described in Patent Document 1 displays an image of a photograph taken of a target placed at a measurement position on a display of an arithmetic processing device. The operator searches for an index image included in the target from the images displayed on the display, and registers a dot positioned at the center of the image as the coordinate position of each index. Thereafter, the amount of advance is calculated based on the coordinates of each registered index.
JP2003-075116

  The advance amount must be measured at a large number of measurement positions over the entire length of the trajectory, but with the technique described in Patent Document 1, a photograph taken is taken at any one of a large number of measurement positions. I can't recognize. For this reason, it is necessary to keep a memo such as “photographed the xxth photo at the yy kilopost” on site, and the operator must manually associate the photo with the measurement position. For this reason, the present situation is that it has not been possible to sufficiently save the labor of the measurement work.

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a track rail management dimension measuring method and apparatus capable of sufficiently saving labor in measurement work by acquiring information related to measurement positions and management dimensions as a set. There is.

The track rail management dimension measurement method for achieving the above object is a track rail management dimension measurement method that uses photogrammetry to measure the management dimensions of the left and right rails in the track. And
A first reflective target is disposed at each of a plurality of measurement positions along the rail so as to optically distinguish information about the measurement position,
A second reflective target is disposed on each of the measurement target portions on the left rail so that the measurement target portion can be optically distinguished,
A third reflective target is disposed on each of the measurement target parts on the right rail so that the measurement target part can be optically distinguished,
Shooting a plurality of images including images of the first to third reflective targets by flash shooting the first to third reflective targets at different angles;
Analyzing the data of the captured image to identify information on the measurement position, calculating the three-dimensional coordinates of the measurement target part on the left rail, and the three-dimensional coordinates of the measurement target part on the right rail,
The management dimensions are calculated from the three-dimensional coordinates of the measurement target parts on the left and right rails, and information on the measurement position and the management dimensions are acquired as a set.

The track rail management dimension measuring apparatus for achieving the above object is a track rail management dimension measuring apparatus for measuring the management dimension to be managed for the left and right rails in the track using photogrammetry. Because
A first reflective target disposed at each of a plurality of measurement positions along the rail and optically distinguishing information about the measurement positions;
A second reflective target that is disposed in each of the measurement target sites on the left rail and that optically distinguishes the measurement target sites;
A third reflective target disposed in each of the measurement target parts on the right rail and showing the measurement target part optically distinguishable;
Imaging means for photographing a plurality of images including images of the first to third reflective targets by flash photographing the first to third reflective targets at different angles;
Control means for analyzing the data of the captured image,
The control means identifies information on a measurement position, calculates a three-dimensional coordinate of a measurement target part on the left rail, and a three-dimensional coordinate of a measurement target part on the right rail, and measures the measurement target part on the left and right rails The management dimension is calculated from each of the three-dimensional coordinates, and information on the measurement position and the management dimension are acquired as a set.

  According to the present invention, it is possible to sufficiently save the labor of measurement work by acquiring information on the measurement position and management dimensions as a set.

  Embodiments of the present invention will be described below with reference to the drawings.

  FIG. 1 is a conceptual diagram showing an example of measuring a travel amount d as a track management dimension of a track, and FIG. 2 is a block diagram showing a rail management dimension measuring apparatus 10 in the track. FIG. 3 is a diagram showing an example of the first reflective target 21 that also serves as the fourth reflective target 24, and FIGS. 4A and 4B show examples of the second and third reflective targets 22 and 23. FIG. 5 and FIG. 5 are diagrams showing an example of the fifth reflection target 25.

  Referring to FIGS. 1 and 2, a rail management dimension measuring device 10 in a track (hereinafter simply referred to as “management dimension measuring device 10”) is a management subject to management of the left and right rails 51 and 52 in the track. Measure the dimensions using photogrammetry.

  In summary, the management dimension measuring apparatus 10 is arranged at each of a plurality of measurement positions along the rails 51 and 52, and the first reflective target 21 and the left rail 51 that optically distinguish information about the measurement positions. The second reflection target 22 is disposed in each of the measurement target parts in FIG. 5 and optically distinguishes the measurement target parts from the second reflection target 22 that shows the measurement target parts in an optically distinguishable manner. The images of the first to third reflective targets 21, 22, and 23 can be obtained by flash photography of the third reflective target 23 and the first to third reflective targets 21, 22, and 23 that are shown as possible. A digital camera 30 (corresponding to an imaging unit) that captures a plurality of images including a controller 40 (control unit 4) that analyzes data of the captured images. It has a corresponding) to. The controller 40 identifies information on the measurement position, and calculates the three-dimensional coordinates of the measurement target part on the left rail 51 and the three-dimensional coordinates of the measurement target part on the right rail 52. The controller 40 calculates a management dimension from the respective three-dimensional coordinates of the measurement target portions in the left and right rails 51 and 52, and acquires information on the measurement position and the management dimension as a set.

  In the present embodiment, the advance amount d is taken as an example of the management dimension. The management dimension measuring device 10 for measuring the amount of advancement is further arranged in each of the reference piles 71 and 72 installed at the fixed points on both sides sandwiching the left and right rails 51 and 52, respectively. It has the 4th reflective target 24 which shows the 1st measurement reference point 61 optically distinguishable, and the 5th reflective target 25 which shows the 2nd measurement reference point 62 optically distinguishable. The digital camera 30 captures a plurality of images including images of the fourth and fifth reflection targets 24 and 25 in addition to the images of the first to third reflection targets 21, 22 and 23. The controller 40 further calculates the three-dimensional coordinates of the first measurement reference point 61 and the three-dimensional coordinates of the second measurement reference point 62. The controller 40 generates a reference line 63 (see the two-dot chain line in FIG. 1) connecting the first and second measurement reference points 61 and 62 from the three-dimensional coordinates of the first and second measurement reference points 61 and 62. The amount of movement from the reference line 63 (the amount of advance d) is calculated as a management dimension. Details will be described below.

  Referring to FIG. 3, the first reflection target 21 is configured by attaching a necessary number of reflectors 80 having a round shape or a circular shape to a plate 81 having an arbitrary shape (rectangular shape in the illustrated example). As the reflector 80, for example, a reflective seal that can be attached to the plate 81 can be used. Information on the measurement position indicated by the first reflective target 21 includes measurement position ID, kilopost information, and the like. The first reflection target 21 is formed so as to be optically distinguishable by changing a reflection pattern formed by arranging a necessary number of reflectors 80. In the present specification, “optically distinguishable” means that the reflection pattern formed by disposing a necessary number (one or more) of reflectors 80 is different from the data of captured images. This means that it can be determined that the reflection target is different from other reflection targets. The same applies to the second to fifth reflective targets 22, 23, 24, 25.

  In the present embodiment, the first reflective target 21 can be attached with a maximum of 12 reflectors 80 in 3 rows and 4 columns. A broken line in FIG. 3 indicates a portion where the reflector 80 is not attached. By arranging the necessary number of reflectors 80 within the maximum number of ranges and making the reflection patterns different, the information on the measurement position is optically distinguishable.

  For example, if four reflectors 80 at the corners are essential, and up to four reflectors 80 are attached to the remaining eight locations, the number of measurement positions that can be encoded is as follows: As shown in Table 1.

  Referring to FIG. 4A, the second reflective target 22 for the left rail 51 requires a reflector 80 having a round shape or a circular shape on a plate 82 having an arbitrary shape (rectangular shape in the illustrated example). A number (three in the illustrated example) is attached. Referring to FIG. 4B, the third reflective target 23 for the right rail 52 requires a reflector 80 having a round shape or a circular shape on a plate 83 having an arbitrary shape (rectangular shape in the illustrated example). A number (one in the illustrated example) is attached. The second and third reflection targets 22 and 23 are also formed so as to be optically distinguishable by differentiating the reflection patterns formed by arranging the required number of reflectors 80.

  The reflector 80 in the middle of the second reflection target 22 and the reflector 80 in the third reflection target 23 are attached to positions corresponding to the reference line with the water string stretched between the fixed points as the reference line. is there. That is, the two reflectors 80 replace the punch punching points given to the left and right rails 51 and 52 in the conventional water thread method, and are used as the reference points for the advancement.

  Since the number of reflectors 80 attached to the left rail 51 is different from the number of reflectors 80 attached to the right rail 52, it is easy to recognize whether the reflector is the left rail 51 or the right rail 52. It can be carried out.

  In the present embodiment, the first reflective target 21 is disposed on the reference pile 71 installed at the fixed point and also serves as the fourth reflective target 24. Since the first reflective target 21 also serves as the fourth reflective target 24, the number of arithmetic processes for the analysis process can be reduced.

  The first reflection target 21 requires the four reflectors 80 at the corners, and the intersection point between the diagonal lines is calculated at the time of the analysis process, whereby the coordinates of the intersection point are set as the coordinates of the first measurement reference point 61. Yes. Accordingly, the first measurement reference point 61 can be optically distinguished by the first reflection target 21 that also serves as the fourth reflection target 24.

  Referring to FIG. 5, the fifth reflective target 25 is configured by attaching a necessary number of reflectors 80 having a round shape or a circular shape to a plate 85 having an arbitrary shape (rectangular shape in the illustrated example). The fifth reflection target 25 is formed so as to be optically distinguishable by changing a reflection pattern formed by arranging a required number of reflectors 80.

  As with the first reflective target 21, the fifth reflective target 25 requires the four reflectors 80 at the corners, and by calculating the intersection of the diagonal lines during the analysis process, The coordinates of the second measurement reference point 62 are used. Thus, the second measurement reference point 62 can be optically distinguished by the fifth reflection target 25.

  In the fifth reflection target 25 including a plurality of reflectors 80, the dimension between the reflectors 80 is known, and serves as a reference point for the reference length when calculating the advance amount. The dimension between the reflectors 80 in the first reflection target 21 or the second reflection target 22 may be known, or reflection in all of the first, second, and fifth reflection targets 21, 22, and 25. The dimension between the bodies 80 may be known.

  Although the example which codes the information regarding a measurement position only by the 1st reflective target 21 was demonstrated, the information regarding a measurement position is coded by the combination of the 1st reflective target 21 and the other reflective targets 22, 23, 25. May be used. The number of measurement positions that can be encoded can be easily increased. For example, if the fifth reflective target 25 can express 16 codes, information on 163 × 16 = 2068 measurement positions can be coded. There is no limit to the number that can be coded by increasing the number of reflectors 80 and the number of reflective targets.

  The arrangement form of the reflectors 80 in each of the reflection targets 21 to 25 is not limited to the illustrated example, and can take an appropriate form. The first reflective target 21 and the fifth reflective target 25 may be ones in which the reflectors 80 are arranged in one row. In this case, two reflectors 80 at both ends are essential, and by calculating the midpoint of the line segment connecting the two reflectors 80 at both ends during the analysis process, the coordinates of the midpoint are set as the first coordinates. The coordinates of the second measurement reference points 61 and 62 can be used.

  Although the 1st-5th reflective targets 21-25 were formed by attaching the reflector 80 to a plate, it can also form by overlapping the plate in which the round hole was formed on the plate-shaped reflector 80. FIG.

  When the reflection targets 21 to 25 are photographed with flash, the reflector 80 reflects light to form a clear image. Since the position of the image can be accurately measured, the amount of advancement can be measured with high accuracy. During flash photography, the shutter speed of the digital camera 30 is increased and the aperture is reduced. This is because the reflector 80 can be projected in a dark background so as to be clearly white. In order to increase the measurement accuracy, it is preferable to photograph the reflection targets 21 to 25 from as many different directions and angles as possible. The image of the reflector 80 has a certain size, and a certain region in the vicinity of the image is cut out in the analysis process. Then, the position of the center of gravity of the image is calculated from the brightness distribution of the image by an image processing technique, and the coordinates of the reflector 80 are determined.

  Referring to FIG. 2, the controller 40 is configured mainly with a CPU and a memory 43. The controller 40 includes an image data input unit 41 that inputs image data stored in the digital camera 30, an analysis processing unit 42 that processes image data and performs arithmetic processing according to the principle of photogrammetry, and information and management regarding measurement positions. It has a memory 43 that stores the dimensions as a data file and stores them, and an output unit 44 that outputs a calculation result or the like to a print or display.

  Next, the procedure for measuring the amount of advance will be described with reference to FIGS.

  FIG. 6 is a main flowchart showing a procedure for measuring the amount of advance, and FIG. 7 is a flowchart showing a procedure in the data analysis process shown in FIG.

  Referring to FIG. 6, when measuring the advance amount, first, each of the reflection targets 21 to 25 is arranged (step S10). Specifically, the first reflective target 21 is provided at each of a plurality of measurement positions along the rails 51 and 52 so that information regarding the measurement position can be optically distinguished. The second reflection target 22 is disposed on each of the measurement target parts on the left rail 51 so that the measurement target part can be optically distinguished. A third reflective target 23 is disposed in each of the measurement target parts on the right rail 52 so that the measurement target part can be optically distinguished. A first measurement reference point 61 is optically distinguishable from each of the reference piles 71 and 72 installed at fixed points set on both sides of the left and right rails 51 and 52, respectively. The fourth reflection target 24 and the fifth reflection target 25 showing the second measurement reference point 62 so as to be optically distinguishable are arranged. The fourth reflection target 24 is also used by the first reflection target 21. The first to third and fifth reflection targets 21, 22, 23, and 25 are disposed when the rails 51 and 52 are newly laid, or are disposed later on the existing rails 51 and 52. The reflector 80 in the middle of the second reflection target 22 and the reflector 80 in the third reflection target 23 are attached to positions corresponding to the reference line with the water string stretched between the fixed points as the reference line. is there.

  Next, the first to third and fifth reflective targets 21, 22 are photographed by flash shooting with the digital camera 30 changing the angles of the first to third, fifth reflective targets 21, 22, 23, 25. , 23 and 25 are taken (step S20).

  Next, the controller 40 analyzes the data of the captured image to identify information on the measurement position, and the three-dimensional coordinates of the measurement target part on the left rail 51 and the three-dimensional measurement target part on the right rail 52. The coordinates, the three-dimensional coordinates of the first measurement reference point 61, and the three-dimensional coordinates of the second measurement reference point 62 are calculated. The controller 40 calculates a reference line 63 connecting the first and second measurement reference points 61 and 62 from the three-dimensional coordinates of the first and second measurement reference points 61 and 62, and in the left and right rails 51 and 52. From each three-dimensional coordinate of the measurement target part, a movement amount (advancing amount) from the reference line 63 is calculated as a management dimension. Thereby, the information about the measurement position and the advance amount are acquired as a set (step S30).

  When the data analysis process for a plurality of images at one measurement position is completed, the data analysis process for a plurality of images at the next measurement position proceeds. Until the data analysis processing for a plurality of images at all measurement positions is completed, the acquisition of information on the measurement positions and the amount of advance is automatically continued (step S40).

  After that, it is compared with statistical data acquired in the past, and maintenance is performed as necessary.

  The procedure in the data analysis process is the same as in general photogrammetry. This will be outlined with reference to FIG.

  First, portions corresponding to the reflection targets 21 to 25 are automatically extracted from the image data (step S51). Since the reflector 80 is used, the brightness difference appears remarkably, so that the reflection targets 21 to 25 can be easily extracted.

  The type of the reflection targets 21 to 25 is recognized (step S52). That is, the first reflection target 21 that also serves as the fourth reflection target 24, the second reflection target 22, the third reflection target 23, and the fifth reflection target 25. Recognize The process of steps S51 and S52 is referred to as labeling.

  The reflection targets 21 to 25 are matched between a plurality of images taken at one measurement position (step S53). The coordinates of the position photographed by the digital camera 30 are calculated (step S54), and the three-dimensional coordinates of each of the reflection targets 21 to 25 are calculated (step S55). Specifically, code data relating to the measurement position is identified from the first reflective target 21, the three-dimensional coordinates of the measurement target portion of the left rail 51 are calculated from the second reflective target 22, and the third reflective target 23 The three-dimensional coordinates of the measurement target portion of the right rail 52 are calculated, the three-dimensional coordinates of the first measurement reference point 61 are calculated from the first reflection target 21 (= fourth reflection target 24), and the fifth reflection is performed. The three-dimensional coordinates of the second measurement reference point 62 are calculated from the target 25.

  After correcting the whole at the same time by bundle adjustment so that there is no contradiction (step S56), the first and second measurement reference points 61 are determined from the three-dimensional coordinates of the first and second measurement reference points 61 and 62. , 62 is calculated and created, and the amount of advance from the reference line 63 to the measurement target portion of the left rail 51 and the amount of advance from the reference line 63 to the measurement target portion of the right rail 52 are calculated. Calculate (step S57).

  Then, the code data relating to the measurement position and the amount of advance of each of the left and right rails 51 and 52 are converted into data files (step S58), and the process returns to the main flow.

  As described above, in the present embodiment, it is possible to sufficiently save labor for measuring the amount of advancement by acquiring the information about the measurement position and the amount of advancement as the management dimension as a set. . In addition, since the reflection targets 21 to 25 are used, the target point of the analysis process can be clearly defined, and the analysis process can be automatically performed with high accuracy as compared with the case where the operator indicates the coordinates of the target. It can be carried out. Accordingly, the amount of advancement can be measured with high accuracy, and the time required for processing can be greatly reduced.

  In addition, although embodiment which mentioned the amount of advance as an example as a management dimension was demonstrated, this invention is not limited to this case.

  For example, the “displacement between gauges” that is the distance between the left and right rails 51 and 52 and the “level displacement” that is the difference in height between the left and right rails 51 and 52 depend on the relative positions of the left and right rails 51 and 52 at a certain point. It is a management dimension that can be calculated. In measuring this type of management dimension, the second reflective target 22 of the left rail 51 and the third reflective target 23 of the right rail 52 are arranged in advance in a direction perpendicular to the longitudinal direction of the rails 51 and 52. Therefore, it is not necessary to provide the fourth and fifth reflection targets 24 and 25 that optically distinguish the first and second measurement reference points 61 and 62 from each other.

  Further, the “height and low displacement” that is the displacement in the vertical direction of the rails 51 and 52 at the position in the longitudinal direction of the rails 51 and 52, and the displacement in the horizontal direction of the rails 51 and 52 in the longitudinal position of the rails 51 and 52 is “ The “passage displacement” is generally measured by a measurement method called “10 m string Masaya method”. In the “10 m string Masaya method”, a 10-meter-long string (string) is stretched along the rails 51, 52, and the rails 51, 52 are connected to each other at the center position of the strings (and therefore, 5 meters from both ends). The vertical dimension and the horizontal dimension are measured. In measuring this type of management dimension, three second reflective targets 22 are arranged on the left rail 51 at intervals of 5 meters, and three third reflective targets 23 are arranged on the right rail 52 at intervals of 5 meters. It can arrange | position and can measure "high-low displacement" and "passage displacement" from the three-dimensional coordinate of these reflective targets 22 and 23. FIG. In measuring this management dimension, the second reflective target 22 of the left rail 51 and the third reflective target 23 of the right rail 52 are previously arranged in a direction orthogonal to the longitudinal direction of the rails 51 and 52. Therefore, it is not necessary to provide the fourth and fifth reflection targets 24 and 25 that optically distinguish the first and second measurement reference points 61 and 62 from each other.

It is a conceptual diagram which shows the example which measures the amount of advance as a management dimension of the rail of a track | orbit. It is a block diagram which shows the management dimension measuring apparatus of the rail in a track | orbit. It is a figure which shows an example of the 1st reflective target which also serves as the 4th reflective target. 4A and 4B are diagrams showing examples of the second and third reflection targets. It is a figure which shows an example of the 5th reflective target. It is a main flowchart which shows the measurement procedure of the amount of progress. It is a flowchart which shows the procedure in the data analysis process shown by FIG.

Explanation of symbols

10 Control dimension measuring device,
21 the first reflective target,
22 second reflective target,
23 third reflective target,
24 fourth reflective target,
25 fifth reflective target,
30 Digital camera (imaging means),
40 controller (control means),
51 Left rail,
52 Right rail,
61 1st measurement reference point,
62 second measurement reference point,
63 A reference line connecting the first and second measurement reference points,
71 Standard pile,
72 Standard pile,
80 reflector,
d The amount of progress.

Claims (10)

A method for measuring the management dimensions of rails in a track, wherein the management dimensions to be managed for the left and right rails (51, 52) in the track are measured using photogrammetry,
A first reflective target (21) is provided in each of a plurality of measurement positions along the rails (51, 52) so as to optically distinguish information about the measurement positions,
A second reflective target (22) is provided on each of the measurement target sites on the left rail (51), so that the measurement target sites can be optically distinguished,
A third reflective target (23) is provided on each of the measurement target parts on the right rail (52) to indicate the measurement target part optically distinguishable,
A plurality of images including the images of the first to third reflective targets (21, 22, 23) are obtained by flash photographing the first to third reflective targets (21, 22, 23) at different angles. Shoot,
By analyzing the data of the captured image, information on the measurement position is identified, and the three-dimensional coordinates of the measurement target portion on the left rail (51) and the tertiary of the measurement target portion on the right rail (52) are identified. Calculate the original coordinates,
A management dimension measuring method for track rails, which calculates the management dimensions from the respective three-dimensional coordinates of the measurement target portions in the left and right rails (51, 52), and acquires information on the measurement position and the management dimensions as a set. . The first measurement reference point (61) is optically distinguished from each of the reference piles (71, 72) installed at the fixed points on both sides of the left and right rails (51, 52). A fourth reflective target (24) shown as possible and a fifth reflective target (25) as shown optically distinguishable from the second measurement reference point (62);
Taking a plurality of images including images of the fourth and fifth reflective targets (24, 25) in addition to the images of the first to third reflective targets (21, 22, 23),
By further analyzing the data of the image, the three-dimensional coordinates of the first measurement reference point (61) and the three-dimensional coordinates of the second measurement reference point (62) are further calculated,
A reference line (63) connecting the first and second measurement reference points (61, 62) is calculated from the three-dimensional coordinates of the first and second measurement reference points (61, 62), and the reference line The method of measuring a track rail management dimension according to claim 1, wherein the movement amount from (63) is calculated as the management dimension.   The first to third reflective targets (21, 22, 23) are formed so as to be optically distinguishable by changing the reflection patterns formed by arranging a required number of reflectors (80). 3. The method for measuring a management dimension of a rail of a track according to claim 1 or 2.   The fourth and fifth reflective targets (24, 25) are formed so as to be optically distinguishable by differentiating the reflection patterns formed by arranging the required number of reflectors (80). The method for measuring a management dimension of a rail of a track according to claim 2.   The track size management method for track rails according to claim 2 or 4, wherein the first reflective target (21) is disposed on the reference pile (71) and also serves as a fourth reflective target (24). . A track rail management dimension measuring device for measuring a management dimension to be managed for left and right rails (51, 52) in a track using photogrammetry,
A first reflective target (21) disposed at each of a plurality of measurement positions along the rails (51, 52), and optically distinguishing information about the measurement positions;
A second reflective target (22) disposed in each of the measurement target parts in the left rail (51) and showing the measurement target part optically distinguishable;
A third reflective target (23) disposed in each of the measurement target parts in the right rail (52) and showing the measurement target part optically distinguishable;
A plurality of images including the images of the first to third reflective targets (21, 22, 23) are obtained by flash photographing the first to third reflective targets (21, 22, 23) at different angles. Imaging means (30) for photographing;
Control means (40) for analyzing the data of the captured image,
The control means (40) identifies information relating to the measurement position, and calculates the three-dimensional coordinates of the measurement target part on the left rail (51) and the three-dimensional coordinates of the measurement target part on the right rail (52). The management dimensions of the track rails are obtained by calculating the management dimensions from the three-dimensional coordinates of the measurement target parts in the left and right rails (51, 52), and obtaining the information on the measurement position and the management dimensions as a set. measuring device. The first measurement reference point (61) is optically arranged on each of the reference piles (71, 72) installed at the fixed points on both sides of the left and right rails (51, 52). A fourth reflective target (24) shown in a distinguishable manner and a fifth reflective target (25) that shows a second measurement reference point (62) as optically distinguishable,
The imaging means (30) includes a plurality of images including images of the fourth and fifth reflection targets (24, 25) in addition to the images of the first to third reflection targets (21, 22, 23). Shoot
The control means (40) further calculates a three-dimensional coordinate of the first measurement reference point (61) and a three-dimensional coordinate of the second measurement reference point (62), and the first and second measurement reference points (62) are calculated. A reference line (63) connecting the first and second measurement reference points (61, 62) is calculated from the three-dimensional coordinates of the measurement reference points (61, 62), and the amount of movement from the reference line (63) is calculated. The track rail management dimension measuring apparatus according to claim 6, wherein the control dimension is calculated as the management dimension.   The first to third reflective targets (21, 22, 23) are formed so as to be optically distinguishable by changing the reflection patterns formed by arranging a required number of reflectors (80). The track | truck rail management dimension measuring apparatus of Claim 6 or Claim 7 currently performed.   The fourth and fifth reflective targets (24, 25) are formed so as to be optically distinguishable by differentiating the reflection patterns formed by arranging the required number of reflectors (80). The track dimension management device for a rail of a track according to claim 7.   The track | truck rail management dimension measuring apparatus of Claim 7 or Claim 9 with which the said 1st reflective target (21) is arrange | positioned at the said reference | standard pile (71), and also serves as a 4th reflective target (24). .

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