JP4889753B2 - Surveying device, railway surveying system, surveying program, information storage medium - Google Patents

Description

  The present invention relates to a surveying device that surveys railway facilities existing in the traveling direction of a train, a railroad surveying system that uses this surveying device, a surveying program that causes a computer to execute this surveying, and an information storage medium that stores this surveying program It is about.

  Conventionally, along the direction of a train traveling on a railroad, a railroad line facility that assists the travel of the train has been installed. For example, the equipment along the railway is a traffic light or an overhead pole.

  At present, many facilities along the railway are aging, and it is necessary to replace the facilities along the railway. When replacing the equipment along the railway, it is necessary to check the dimensions of the equipment along the railway in advance. However, the railway facilities that need to be replaced have been installed, for example, more than 10 years ago, and there are almost no drawings describing the dimensions of the railway facilities.

Therefore, at present, workers have to go directly to the site to survey the facilities along the railway.
Patent Document 1 proposes a railway surveying system that recognizes a rail with two CCD cameras.

Japanese Patent Laid-Open No. 2002-2485

However, the facilities along the railway are installed along the tracks, and some are located above the tracks. For this reason, in surveying the facilities along the railroad, workers can survey at high places, power out the railroad facilities before surveying, and secure personnel to watch whether the train approaches the railroad facilities during the survey. Have to do.
Therefore, there is a problem that the survey of the facilities along the railway in the site involves a great deal of labor and danger.

  The present invention is intended to solve such a conventional problem, and a surveying apparatus, a railway surveying system, a surveying program, and a surveying instrument that can easily perform surveying of facilities along the railway without having to go to the site, and An object is to provide an information storage medium storing this surveying program.

  The surveying apparatus of the present invention has the following configuration in order to solve the above problems.

(1) Moving image data indicating an image of the traveling direction of the train taken by a single video camera attached to a train traveling on a track, a plurality of image frames constituting a moving image based on the moving image data, and each A correspondence table that correlates the position of the video camera when the image frame is shot, and a reading unit that reads the moving image data from the recorded medium;
Surveying means for surveying a gate-shaped overhead pole existing along the traveling direction of the train;
For the overhead pole to be surveyed, an input means for receiving an input of the first position of the video camera ;
Designation means for accepting designation of both corners of the overhead pole on the image frame read from the video data ;
The reading means includes an image frame of the overhead pole taken by the video camera at the first position input by the input means and a first distance displaced from the first position input by the input means. The image frame of the same overhead pole imaged by the video camera at a second position is read from the video data based on the correspondence table,
The surveying means includes a first designated line that connects the first position and one of the two points at both corners of the overhead pole designated by the designation means, and a first line formed by a center line of the two points. A second corner formed by a corner, a second designated line connecting the one point and the second position and the center line, the both image frames read by the reading means , and the first position. wherein the predetermined distance until said second position, based on, and performing a survey of the overhead wire pole.

In this configuration, the medium is, for example, an optical disk, a magnetic disk, or a semiconductor memory. In addition, the facilities along the railway for surveying are gate-type overhead poles .
In this configuration, the surveyor inputs the first position with the input means and specifies the above two points with the specifying means for the overhead pole for which the dimensions are desired. Thereby, the reading unit reads the image frame corresponding to the first position and the image frame corresponding to the second position from the correspondence table . Their to surveying means performs a survey of the overhead line pole by performing stereo vision for two image frames copy the same overhead wire posts. Therefore, even if the worker does not go to the site, the survey of the overhead pole that is the facility along the railway can be easily performed.

(2) In the surveying of the overhead pole, the surveying means sets the first angle to θ ₁ and the second angle to θ ₂ , and the predetermined position from the first position to the second position. When the distance is L, the distance between the two corners of the overhead wire column is 2T, and the height of the overhead wire column is Z , the first equation of “Z ² + T ² = S ² ” and “S = L × tanθ ₁ × tanθ ₂ / ( tanθ ₂ −tanθ ₁ ) ”and a third equation of“ T = (T / tanθ ₁ −L) × tanθ ₂ ” From the above, the distance 2T between the two points on the both corners of the overhead wire column and the height Z of the overhead wire column are calculated.

(3) It has a storing means for storing the survey result measured by the surveying means in association with the position of the surveyed overhead pole .

In this configuration, the survey result is stored in the storage means in association with the position of the surveyed overhead pole . Therefore, the surveyor can hold the survey result in the form of data.

  Moreover, the railway survey system of this invention is equipped with the following structures in order to solve the said subject.

(4) a single video camera attached to a train traveling on the track and capturing an image of the traveling direction of the train;
Positioning means for positioning the position of the video camera during shooting;
Correspondence that creates moving image data based on an image photographed by the video camera, and associates a plurality of image frames constituting the created moving image data with the position of the photographing means when each image frame is photographed Creating means to create a table;
An in-vehicle device having
The surveying device according to any one of (1) to (3) above is provided.

The in-vehicle device of the railway survey system in this configuration creates moving image data and a correspondence table used by the survey devices (1) to (3) above.
Thereby, there exists an effect similar to said (1).

  Moreover, the surveying program of this invention is equipped with the following structures in order to solve the said subject.

(5) Movie data indicating an image of the traveling direction of the train taken by a video camera attached to a train traveling on the track, a plurality of image frames and each image frame constituting a movie based on the movie data A correspondence table that correlates the position of the video camera at the time of shooting, and a reproduction step of reading and reproducing the moving image data from the recorded medium;
When the video data reproduction by said reproduction step, the overhead wire pole of the portal to be surveyed which lies along the traveling direction of the train, an input step of accepting input of a first position of said video camera,
A designation step of accepting designation of both corners of the overhead pole on the image frame read from the video data;
An image frame of the overhead line pole which the video camera has been the first position input in said input step is taken, the in second position by a predetermined distance displaced from the first position input in said input step An image frame of the same overhead pole imaged by a video camera, and a reading step of reading from the moving image data based on the correspondence table;
The first angle formed by the first designated line connecting the first position and the center line of the two points and the one of the two points of the two corners of the overhead pole designated in the designation step, and the one The second designated line connecting the point and the second position and the second corner formed by the center line, both the image frames read by the reading step, and the second position from the first position wherein the predetermined distance to, based on, characterized in that to perform the surveying step of performing a survey of the overhead wire pole, to the computer.

The surveying program in this configuration is a program that causes a computer to execute the processing performed in (1) above.
Thereby, there exists an effect similar to said (1).

  The information storage medium of the present invention has the following configuration in order to solve the above problems.

(6) A computer-readable information storage medium storing the surveying program according to (5).

  In this configuration, the information storage medium is, for example, an optical disk or a semiconductor memory.

  According to the present invention, it is possible to easily survey the facilities along the railway line even if the worker does not go to the site.

The block diagram which shows the structure of each part of the vehicle-mounted apparatus of the railway surveying system which is embodiment of this invention. The flowchart which shows the operation | movement which the control part of the said vehicle equipment performs A figure showing a situation when shooting an arbitrary overhead pole with a video camera The figure which shows the image frame of the overhead pole taken at the first position and the second position The figure which shows an example of the corresponding | compatible table which matched the some image frame which comprises moving image data, and position information. The block diagram which shows the structure of each part of the surveying apparatus of the railway surveying system which is embodiment of this invention. The flowchart which shows the operation | movement which the control part of the said surveying apparatus performs. The figure which shows an example of the display screen displayed during surveying in embodiment of this invention The figure which shows a mode when photographing two overhead poles with a video camera

  Hereinafter, a railway surveying system according to an embodiment of the present invention will be described.

FIG. 1 is a block diagram showing the configuration of each part of an in-vehicle device of a railway surveying system that is an embodiment of the present invention. The in-vehicle device 2 includes an image capturing unit 11 as an interface connected to the video camera 10, a positioning unit 12 that measures the position of the video camera 10, a control unit 13 that controls the operation of each part of the device body, and information. A storage unit 14 for storing, an operation unit 15 for receiving an input operation by an operator, a display unit 16 for displaying information, and a USB port 17 to which a USB memory 18 is attached are provided. A railway surveying system according to an embodiment of the present invention includes the in-vehicle device 2 and a surveying device 3 (FIG. 6) described later.
In addition, although the video camera 10 and the vehicle-mounted apparatus 2 in this embodiment are installed in the head vehicle of the train 1, you may install anywhere on the train 1 in the case of implementation. However, it is preferable that the video camera 10 and the in-vehicle device 2 are installed in the same vehicle.

  The storage unit 14 is configured by, for example, a hard disk or a flash memory. The storage unit 14 stores a control program in which a control method for each part of the apparatus main body is described.

  The video camera 10 is attached to the driver's seat of the leading vehicle of the train 1 that travels on the track in the direction of the arrow. The video camera 10 captures an image in the traveling direction of the train 1 and generates image data indicating the captured image. Then, the video camera 10 outputs the image data to the image capturing unit 11.

  The image capturing unit 11 captures image data input from the video camera 10 and outputs the image data to the control unit 13.

The control unit 13 is composed of, for example, an MPU, and incorporates a RAM 13A as a work field for developing data processed by the control program. The control unit 13 encodes the image data input from the image capturing unit 11 by, for example, MPEG (Moving Picture Experts Group). Thereby, in this embodiment, moving image data of 30 image frames / second is created (see FIG. 5 described later). Then, the control unit 13 stores the created moving image data in the storage unit 14 or the USB memory 18. Here, as is well known, the image data encoded by the MPEG method includes an intra-frame encoded image (I picture) in which the entire screen of one image frame is intra-coded without using prediction, and prediction is performed. The picture types of the inter-frame forward predictive encoded image (P picture) to be used and the bi-predictive encoded image (B picture) using prediction inserted between the I and P pictures after being processed first are is there. That is, the I picture is restored to a single image by itself, and the P and B pictures are restored to images based on the I picture.
The control unit 13 corresponds to the “creating unit” of the present invention.

The positioning unit 12 includes, for example, a GPS antenna, an RF amplifier, an A / D, a data register, a counter, a decoder, and a microcomputer that controls them. The positioning unit 12 receives radio waves from GPS satellites with a GPS antenna. Next, the positioning unit 12 amplifies and demodulates the received signal. And the positioning part 12 decodes the satellite data acquired by demodulation. Then, the positioning unit 12 measures the position of the video camera 10 based on the decoded data. Finally, the positioning unit 12 sends the position information obtained by the measurement to the control unit 13. This position information is information indicating the latitude and longitude of the video camera 10 in the XY coordinate system (see FIG. 5 described later).
In order to perform accurate positioning, the positioning unit 12 is preferably installed at the same position as the video camera 10 in the XY coordinate system.

  The operation unit 15 is provided with a plurality of keys for receiving operation inputs from the user. The plurality of keys include, for example, a shooting start key for instructing the start of moving image shooting, a shooting end key for instructing the end of moving image shooting, and the like.

  The display unit 16 is configured by, for example, an LCD (Liquid Crystal Display).

  Here, in this embodiment, it is divided into a photographing stage for photographing an image in the traveling direction of the train 1 and a surveying stage for surveying the facilities along the railway based on the image photographed in the photographing stage. First, the photographing stage will be described.

  FIG. 2 is a flowchart showing an operation performed by the control unit of the in-vehicle device. FIG. 3 is a diagram illustrating a situation when an arbitrary overhead pole is photographed with a video camera. 4A shows an image of the overhead pole 90 taken at the second position 92 shown in FIG. 3, and FIG. 4B shows the image taken at the first position 91 shown in FIG. The image of the overhead pole 90 is shown. FIG. 5 is a diagram illustrating an example of a correspondence table in which a plurality of image frames constituting moving image data are associated with position information.

  The operator presses the shooting start key when the train 1 departs from the garage or the station. Thereby, the control part 13 performs the imaging | photography process shown in FIG. Thereby, the video camera 10 starts capturing an image in the traveling direction of the train 1.

  First, the control unit 13 acquires original image data captured by the image capturing unit 11 (S1).

  Then, the control unit 13 encodes the image data to create moving image data (30 image frames / second in this embodiment) (S2). Here, in photographing by the video camera 10, for example, an overhead pole 90 as shown in FIG. In FIG. 3, the image frame 101 shown in FIG. 4B is obtained by photographing the overhead pole 90 from the first position 91, and the image obtained by photographing the overhead pole 90 from the second position 92 is shown in FIG. The image frame 102 shown in FIG. The image frames 101 and 102 are part of all the image frames constituting the moving image based on the moving image data created in S2. Since the image frame 101 is an image frame obtained by photographing the overhead pole 90 from a distance, the image of the overhead pole 90 is enlarged from the image frame 102 to the image frame 101.

  Furthermore, the control unit 13 acquires position information from the positioning unit 12 (S3). Thereby, the latitude and longitude of all the positions that the train 1 has passed are acquired by the control unit 13 in the XY coordinate system. For example, the latitude and longitude of the first position 91 and the second position 92 are acquired by the control unit 13 as XY values.

  The control unit 13 creates a correspondence table 20 (see FIG. 5) in which each image frame constituting the moving image data is associated with the position of the video camera 10 when each image frame is captured, and the moving image data is associated with the correspondence table 20. At the same time, it is stored in the storage unit 14 or the USB memory 18 (S4). In S <b> 4, if the USB memory 18 is attached to the USB port 17, the control unit 13 stores the correspondence table 20 and moving image data in the USB memory 18. If the USB memory 18 is not attached to the USB port 17 in S4, the operator copies or moves the moving image data from the storage unit 14 to the USB memory 18.

  Thereafter, the control unit 13 repeats the operations of S1 to S4 until the end of shooting of the moving image is instructed by the shooting end key. When shooting is completed, the moving image file storing the moving image data is stored in the USB memory 18. The operator removes the USB memory 18 from the USB port 17, and the surveyor who performs surveying attaches the USB memory 18 to the USB port 31 of the surveying apparatus 3 shown in FIG. Then, in the surveying device 3, the surveyor surveys the facilities along the railway such as the overhead pole 90.

  In this embodiment, the moving image data is recorded in the USB memory 18, but in the implementation, the moving image data may be recorded on a magnetic video tape. In this case, the surveyor uses this video tape for surveying instead of the USB memory 18.

  Next, the surveying stage will be described.

  FIG. 6 is a block diagram showing a configuration of each part of the surveying device of the railway surveying system according to the embodiment of the present invention. The surveying device 3 includes a USB port 31 in which the USB memory 18 is mounted, a control unit 32 that controls the operation of each unit of the device main body, a storage unit 33 that stores information, and an operation unit that receives input operations by an operator. 34, a display unit 35 for displaying information, and a drive device 36 for reading data from the set optical disk 37 and transmitting the data to the control unit 32.

  The control unit 32 is composed of, for example, an MPU, and incorporates a RAM 32A as a work field for developing data processed by the control program. The control unit 32 reads information recorded in the USB memory 18 via the USB port 31.

  The storage unit 33 is composed of, for example, a hard disk. The storage unit 33 stores a control program in which a control method for each part of the apparatus main body is described, and a survey support program installed in advance in the control program.

  Note that the administrator of the surveying apparatus 3 sets the computer-readable optical disc 37 (in this embodiment, CD-ROM) storing the surveying support program in the drive device 36 and instructs the installation with the operation unit 34. Thereby, the survey support program is installed in the control program by the control unit 32.

  The operation unit 34 is provided with a plurality of keys for receiving operation inputs from the user. The plurality of keys include, for example, an activation key for instructing activation of a surveying support program, a cursor key for accepting movement of a cursor 52 (see FIG. 8 described later) displayed on the screen of the display unit 35, and on the screen of the display unit 35 Include a designation key for designating what the cursor 52 points to, a numeric keypad for accepting input of numbers and decimal points, an end key for instructing the end of the surveying support program being executed, and the like.

  The display unit 35 is configured by, for example, an LCD (Liquid Crystal Display).

  The control unit 32 corresponds to the “reading unit” and “surveying unit” of the present invention. The USB memory 18 corresponds to the “media” of the present invention. The operation unit 34 corresponds to “input means” and “designating means” of the present invention. The survey support program corresponds to the “survey program” of the present invention.

  FIG. 7 is a flowchart showing an operation performed by the control unit of the surveying apparatus. This operation is performed when the surveyor presses the start key while the USB memory 18 in which the correspondence table 20 and the moving image file are recorded is attached to the USB port 31.

  The control unit 32 activates the survey support program and expands the survey support program from the storage unit 33 onto the RAM 32A (S101). And the control part 32 performs the following processes according to a survey support program.

  The control unit 32 starts playback of the moving image file recorded in the USB memory 18 on the display unit 35 (S102). Thereby, for example, a screen as shown in FIG. 8 is displayed on the display unit 35, and a moving image based on the moving image file is reproduced in the video area 41 of the display unit 35.

  FIG. 8 is a diagram showing an example of a display screen displayed during surveying in the embodiment of the present invention. On the screen of the display unit 35, a window 40 for surveying by the surveyor, a window 60 for displaying a map, a window 70 in which survey results are described in a table format, and a cursor 52 are displayed. .

The window 60 displays a map, a track line 61 that indicates a track that exists on the map, and a pointer 62 that indicates the position of the video camera 10 when the image frame currently reproduced in the video area 41 is captured. Is done. The control unit 32 displays a map in the window 60 based on the correspondence table 20 according to the image frame reproduced in the video area 41. Further, the control unit 32 moves the pointer 62 based on the correspondence table 20 in accordance with the image frame reproduced in the video area 41. Then, the control unit 32 scrolls the map of the window 60 according to the position of the pointer 62.
Since the video camera 10 is attached to the train 1, the pointer 62 indicates the current position of the train 1.

  The window 40 includes a video area 41, a status bar 42, a frame 44, a rewind button 45, a cue button 46 for jumping to the previous chapter, a pause button 47, a play button 48, a next button, A cue button 49 for jumping to a chapter, a fast-forward button 50, and a frame 51 are displayed. The status bar 42 indicates the total playback time of the moving image file, and the current bar 43 indicates the current playback elapsed time. The time indicated by the frame 44 indicates the elapsed playback time at the current bar 43. The video area 41 is an area for displaying an image frame image at the current playback elapsed time. The frame 51 shows the distance from the shooting start point to the current point, that is, the travel distance traveled by the train 1. Based on the correspondence table 20, the control unit 32 calculates the movement distance from the position information of the shooting start point and the current point and displays it on the frame 51. In the frame 51, the user can also specify a desired moving distance with the numeric keypad described above.

  The cursor 52 is a cursor that moves on the screen of the display unit 35 by operating a cursor key.

  After S102, the control unit 32 determines whether an arbitrary point is specified in the window 60 (S103) or whether an arbitrary moving distance is specified in the frame 51 of the window 40 (S104). In S <b> 103 and S <b> 104, the surveyor places the cursor 52 on an arbitrary point on the track line 61 displayed in the window 60 and designates with the designation key. As a result, the control unit 32 moves the pointer 62 to the designated point and displays an image frame corresponding to the position pointed to by the pointer 62 in the video area 41 based on the correspondence table 20. Further, in S103 and S104, the surveyor puts the cursor 52 on the frame 51 and designates a desired moving distance with the numeric keypad. Then, the control unit 32 moves the current bar 43 to a location corresponding to the designated movement distance based on the correspondence table 20. As a result, an image frame corresponding to the designated moving distance is displayed in the video area 41.

  When an arbitrary point is designated in S103 and S104, the control unit 32 sets the designated point as the first position, and displays an image frame at the first position in the video area 41 (S105). Thereby, in this embodiment, the image frame 101 as shown in FIG. 8B is displayed, and the first position 91 is determined. The surveyor looks at the image frame 101 and puts the cursor 52 on both ends of the two points to be surveyed and designates the two points with the designation key. As a result, the two end points P1 and P2 are marked on the image frame 101 as shown in FIG.

When the two end points P1 and P2 are designated on the image frame 101 (Y in S106), the control unit 32 searches for the image frame at the second position (S107). Here, the image frame at the second position is the first position among the image frames in which the same equipment along the railway as the image frame at the first position is shown within a radius specified in advance with the first position as the center. An image frame located at the furthest position from. The farthest position corresponds to the second position.
When the playback button 48 is specified without specifying the two end points P1 and P2 (N in S106), the control unit 32 resumes the playback of the moving image data and returns to S103.

  When the image frame 102 at the second position is found (Y in S108), the control unit 32 displays the image frame 102 at the second position in the video area 41 (S109). Thereby, in this embodiment, the image frame 102 as shown in FIG. 8A is displayed, and the second position 92 is determined. While looking at this image frame 102, the surveyor moves the cursor 52 to the same point as the two end points P1 and P2 specified earlier, and designates the two points with the designation key. As a result, the two end points P1 and P2 are marked on the image frame 102 as shown in FIG.

  When the two end points P1 and P2 are designated on the image frame 102 (Y in S110), the control unit 32 determines the facilities along the railway along the distance between the image frames 101 and 102 and the image frames 101 and 102. Surveying is performed (S111). That is, the control unit 32 performs surveying of the railway line facility by performing a stereo view on the two image frames 101 and 102 that depict the same rail line facility.

The surveying performed in S111 will be described in detail with reference to FIG. 3, FIG. 4, and FIG. First, the first position 91 is determined in S105, and the second position 92 is determined in S109. Therefore, based on the position information of the first position 91 and the position information of the second position 92, the movement distance L of the train 1 shown in FIG. The overhead wire pillar 90 is a gate-type overhead wire pillar. Therefore, when the two end points P1 and P2 are designated on the image frame 101 in S106, the angle θ ₁ formed by the first designated line connecting the end point P2 and the first position 91 and the center line 94 of the two end points P1 and P2 is determined. Determined. Furthermore, if two end points on the image frame 102 P1, P2 is designated in S110, the angle theta ₂ formed by the second specified line and the center line 94 connecting the second position 92 and the end point P2 is determined. Therefore, the control unit 32, based on the moving distance L and the angle theta ₁ and the angle theta _2, it is possible to perform a survey of the overhead wire pole 90.

Here, the calculation formula used in the surveying of the overhead pole 90 will be exemplified. First, assuming that the height of the overhead pole 90 is Z and the distance between the end points P1 and P2 is 2T, the first equation of “Z ² + T ² = S ² ” is established from the three-square theorem. Of these, S can be calculated by the second equation of “S = L × tan θ ₁ × tan θ ₂ / (tan θ ₂ −tan θ ₁ )”. Next, for T, the third equation of “T = U × tan θ ₁ ” and the fourth equation of “T = (UL) × tan θ ₂ ” are established. Therefore, the value of T can be calculated by solving two simultaneous equations. Therefore, since the value of Z can also be obtained from the formula “Z ² + T ² = S ² ”, the control unit 32 can measure the height of the overhead pole 90 and the distance between the two end points P1 and P2 (S111). . In addition, since the distance V from the second position 92 to the position 93 of the railway facility is obtained by the fifth equation of “V = U−L−Z”, the control unit 32 provides positional information of the installation position 93 of the railway facility Can also be calculated.

The distance between the two end points P1 and P2 is determined by calculating the relative distance from the origin P1 to the designated end point P2 with the designated end point P1 as the origin of the three-dimensional coordinates. Become. Therefore, when the designated end point is not P2 but P3 (see FIG. 9), the control unit 32 calculates a relative distance from the origin P1 to the end point P3 in S111. More specifically with reference to FIG. 9, the control unit 32 specifies the position of the end point P1 by performing stereo viewing at the first position 91 and the second position 92 with respect to the end point P1, and sets it as the origin of the three-dimensional coordinates. . The position of the end point P1 is specified using the same arithmetic expression as the above arithmetic expression. Next, the control unit 32 specifies the position of the end point P3 by performing a stereo view at the first position 95 and the second position 96 with respect to the end point P3. The position of the end point P3 is specified using an arithmetic expression similar to the above arithmetic expression. That is, “θ ₁ ” is set to “θ ₃ ”, “θ ₂ ” is set to “θ ₄ ”, “L” is set to “L 2”, “S” is set to “S 2”, and “T” is set to “T 2”. , “U” is replaced with “U2”, “V” is replaced with “V2”, and “Z” is replaced with “Z2”. Here, the distance M from the first position 91 to the first position 95 is a parameter including the traveling direction of the train 1 measured by the positioning unit 12 and is obtained from the correspondence table 20. When the specification of the positions of the end points P1 and P3 is completed, the control unit 32 calculates the relative distance from the origin P1 to the end point P3 based on the distance M, with the end point P1 as the origin. Thereby, the distance between the overhead wire pillar 90 and the overhead wire pillar 190 is obtained.

When the survey of the overhead pole 90 is completed in S111, the control unit 32 displays the survey result in the window 40 (right side of the video area 41) (S112). Further, the control unit 32 describes the survey result in the window 70 in association with the position of the railway line facility (S113). The survey results described in the window 70 are stored in the storage unit 33 in a table format.
When the surveying support program is finished and started next time, the surveying result is read from the storage unit 33 by the surveying support program and displayed on the window 70.

  And the control part 32 displays on the display screen of the display part 35 the message which asks a surveyor whether to survey about another railway line installation, and determines whether surveying is continued (S114). In S114, the surveyor can select with the play button 48 or the end key whether or not to perform surveying for other railway facilities.

  When the playback button 48 is designated after S113 (Y of S114), the control unit 32 resumes the playback of the moving image data (S115), and returns to S103. On the other hand, when the end key is operated after S113 (N in S114), the control unit 32 ends the surveying support program being executed, and ends this processing.

From the above, the surveyor designates two image frames and two end points P1 and P2 for the facility along the railroad to know the dimensions while looking at the display screen of the display unit 35 of the surveying device 3. Thereby, surveying is performed for the facilities along the railway. Therefore, it is possible to easily survey the facilities along the railway line even if the worker does not go to the site.
Further, since the survey result is stored in the storage unit 33 in association with the position of the surveyed railway line equipment, the surveyor can hold the survey result in a state of data.

DESCRIPTION OF SYMBOLS 1 ... Train 2 ... In-vehicle apparatus 3 ... Surveying apparatus 10 ... Video camera 11 ... Image capture part 12 ... Positioning part 13 ... Control part 13A ... RAM
DESCRIPTION OF SYMBOLS 14 ... Memory | storage part 15 ... Operation part 16 ... Display part 17 ... USB port 18 ... USB memory 20 ... Correspondence table 31 ... USB port 32 ... Control part 32A ... RAM
33 ... Storage unit 34 ... Operation unit 35 ... Display unit 40 ... Window 41 ... Video area 42 ... Status bar 43 ... Current bar 44 ... Frame 45 ... Rewind button 46 ... Cue button 47 ... Pause button 48 ... Play button 49 ... Cue button 50 ... Fast forward button 51 ... Frame 52 ... Cursor 60 ... Window 61 ... Track line 62 ... Pointer 70 ... Window 90 ... Overhead pole 91 ... First position 92 ... Second position 93 ... Installation position 94 ... Center line 95 ... first position 96 ... second position 97 ... installation position 101 ... image frame 102 ... image frame 190 ... overhead pole L ... moving distance

Claims (6)

Moving image data showing an image of the traveling direction of the train taken by a single video camera attached to a train traveling on the track, a plurality of image frames constituting each moving image based on the moving image data, and each image frame A correspondence table that correlates the position of the video camera at the time of shooting, and a reading unit that reads the moving image data from a recorded medium;
Surveying means for surveying a gate-shaped overhead pole existing along the traveling direction of the train;
For the overhead pole to be surveyed, an input means for receiving an input of the first position of the video camera ;
Designation means for accepting designation of both corners of the overhead pole on the image frame read from the video data ;
The reading means includes an image frame of the overhead pole taken by the video camera at the first position input by the input means and a first distance displaced from the first position input by the input means. The image frame of the same overhead pole imaged by the video camera at a second position is read from the video data based on the correspondence table,
The surveying means includes a first designated line that connects the first position and one of the two points at both corners of the overhead pole designated by the designation means, and a first line formed by a center line of the two points. A second corner formed by a corner, a second designated line connecting the one point and the second position and the center line, the both image frames read by the reading means , and the first position. wherein the predetermined distance to the second position, based on the surveying device which is characterized in that a survey of the overhead wire pole.   The surveying means sets the first angle to θ in the survey of the overhead pole. ₁ And the second angle is θ ₂ When the predetermined distance from the first position to the second position is L, the distance between the two points of the overhead line column is 2T, and the height of the overhead line column is Z, Z ² + T ² = S ² ”And“ S = L × tan θ ₁ × tanθ ₂ / (Tanθ ₂ −tanθ ₁ ) "And" T = (T / tanθ ₁ −L) × tan θ ₂ The distance 2T between the two points of the both corners of the overhead wire column and the height Z of the overhead wire column are calculated from simultaneous equations composed of Surveying equipment. The surveying apparatus according to claim 1, further comprising a storage unit configured to store the survey result measured by the surveying unit in association with the measured position of the overhead pole . A single video camera attached to a train traveling on the track and taking an image of the direction of travel of the train;
Positioning means for positioning the position of the video camera during shooting;
Correspondence that creates moving image data based on an image photographed by the video camera, and associates a plurality of image frames constituting the created moving image data with the position of the photographing means when each image frame is photographed Creating means to create a table;
An in-vehicle device having
A railway surveying system comprising: the surveying device according to claim 1. When shooting moving image data indicating an image of the traveling direction of the train taken by a video camera attached to a train traveling on the track, a plurality of image frames constituting each moving image based on the moving image data, and each image frame A correspondence table that correlates the position of the video camera, and a reproduction step of reading and reproducing the moving image data from the recorded medium;
When the video data reproduction by said reproduction step, the overhead wire pole of the portal to be surveyed which lies along the traveling direction of the train, an input step of accepting input of a first position of said video camera,
A designation step of accepting designation of both corners of the overhead pole on the image frame read from the video data;
An image frame of the overhead line pole which the video camera has been the first position input in said input step is taken, the in second position by a predetermined distance displaced from the first position input in said input step An image frame of the same overhead pole imaged by a video camera, and a reading step of reading from the moving image data based on the correspondence table;
The first angle formed by the first designated line connecting the first position and the center line of the two points and the one of the two points of the two corners of the overhead pole designated in the designation step, and the one The second designated line connecting the point and the second position and the second corner formed by the center line, both the image frames read by the reading step, and the second position from the first position wherein the predetermined distance to, on the basis of the surveying program for executing the surveying step, to the computer to perform the survey of the overhead wire pole.   A computer-readable information storage medium storing the surveying program according to claim 5.

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