JP7242370B2 - Underground object management system - Google Patents

Description

TECHNICAL FIELD The present invention relates to a buried object management system for managing the laying state of a buried object buried in the ground by civil engineering work after completion of construction.

Upon completion of construction work to install underground objects such as gas pipes through civil engineering work, installation information such as as-built drawings and geographic information system data is created. Completion drawing is a revised design drawing based on design changes that occurred during construction. Geographical information system data visualizes the installation status on a map based on the as-built drawing, and records all installation status of gas pipes, etc. due to past construction work.
Completion drawings and geographic information system data are created based on the drawings recorded in the daily construction report that records the details of construction.
The drawing is a record of the laying condition of the gas pipe laid by the construction on the day (for example, the distance of the gas pipe laid, etc.). Measurements are taken and drawings are drawn based on the results of the hand measurements.
However, since manual measurement is laborious and time-consuming, the burden of creating drawings is heavy for workers in the field. In order to reduce the labor and time required for manual measurement, as disclosed in Patent Document 1, electromagnetic waves are radiated into the ground, reflected waves from buried objects are received, and based on the intensity of the reflected waves, It is conceivable to use a three-dimensional voxel data display device capable of detecting the position of a buried object in the ground.

JP-A-2000-221266

However, the above prior art has the following problems.
The three-dimensional voxel data display device disclosed in Patent Literature 1 is used after a buried object such as a gas pipe is buried in the ground. Since the properties of soil are often uneven and variations occur in the intensity of electromagnetic waves, there is a risk that the exact position of a buried object cannot be detected. In addition, it is not possible to confirm whether the detection result is correct after it has already been embedded in the ground.
Therefore, it is considered desirable to measure before embedding the implant. As a method to efficiently record the laying state of the buried object before embedding, it is possible to record the laying state of the gas pipe as three-dimensional data by laser scanning, but the problem is that the equipment is very expensive. Become. That is, in many cases, about 100 construction projects are carried out per day, and in order to record the installation status at each site, about 100 units of equipment must be prepared, which makes the cost enormous and unrealistic. . Therefore, at present, it is common to employ a method of manually measuring using a scale or the like before burying the buried object, and it is desired to reduce the labor and time required for the manual measurement by the operator.

In addition, since information such as the shape and size of the buried object is generally written in the construction daily report, the worker should make a note of the information such as the shape and size of the buried object during the work. Based on the memo, information on the buried object is written in the construction daily report. Such work is complicated, and entry errors may occur, so it is difficult to ensure that correct information is entered. If an entry error occurs in the construction daily report, there arises a problem that the reliability of the information in the as-built drawings and geographic information system data is lowered.

The present invention is intended to solve the above-mentioned problems, and it is possible to efficiently record the laying state before burying the buried object, thereby reducing the burden on the worker and recording the laying state after the completion of construction with high reliability. It is an object of the present invention to provide a system capable of generating drawings representing

In order to solve the above problems, the buried object management system of the present invention has the following configuration .

( 1 ) In a buried object management system for managing the laying state of a buried object buried in the ground by civil engineering work after completion of construction, the buried object is placed at a predetermined position on the surface, and at least the shape and size of the buried object are specified. a photographing device for photographing an image including at least the signature after placement of the buried object in the ground but before embedding; and a communication unit capable of communicating with the photographing device. and a drawing generation unit that generates a drawing representing the installation state, which holds information included in the mark included in the image, based on the image acquired from the imaging device via the communication unit. The mark is a two-dimensional arrangement of a plurality of cells having a predetermined color, and has a notch for detecting the position of the region of the mark. The cell represents the information, the cells are located in each area divided by dividing lines based on the shape of the notch, the buried object has a cylindrical shape, and the mark is at the front . When the mark included in the image is damaged by being rolled up following the cylindrical shape, the buried object management system confirms the orientation of the mark by the notch portion, and adjusts the horizontal direction of the mark. Recognizing the cell arrangement by recognizing the length, calculating the size of the defect of the code from the length, and correcting the code according to the calculated size of the defect. ,

(5) In the buried object management system described in (1) , a position information acquisition unit is provided, and the position information acquisition unit is configured to, based on an image captured by an imaging device, from a distance from a predetermined reference position appearing in the image. , a relative coordinate calculation unit for calculating the relative coordinates of the sign, and the drawing includes information on the relative coordinates.

(6) In the buried object management system described in (1) , a position information acquisition unit is provided, and the position information acquisition unit uses GPS after the buried object is placed underground and before it is embedded. The positioning device acquires the absolute coordinates of the mark through a communication unit and transmits the absolute coordinates to the buried object management system through the communication unit, and the drawing includes information on the absolute coordinates.

(7) In the buried object management system described in (1) , a position information acquisition unit is provided, and the position information acquisition unit is configured to, based on an image captured by an imaging device, from a distance from a predetermined reference position appearing in the image. , a relative coordinate calculation unit that calculates the relative coordinates of the symbol; a positioning device for transmitting coordinates to a buried object management system, and the drawing includes information on relative coordinates and absolute coordinates.

The buried object management system of the present invention has the following functions and effects due to the above configuration.
According to the buried object management system described in (1), it is possible to efficiently record the laying condition before burying the buried object, which reduces the burden on the worker, and a drawing showing the laying condition after completion of construction with high reliability. can be generated.
For example, a tag including at least information on the shape and size of the buried object is attached to the buried object such as a gas pipe or joint. Then, if an image including at least the mark is acquired by the photographing device and the position information of the mark is acquired by the position information acquisition unit, the drawing generation unit acquires the information included in the mark included in the image and the position information. Based on the position information acquired by the department, it is possible to generate a drawing representing the laying state. A drawing can be generated by connecting the points with straight lines, drawing joints on the plotted points, and gas pipes on the lines connecting the points. At this time, the drawn gas pipes and joints are specified based on information on the shape and size of the gas pipes and joints possessed by the mark.
Therefore, it is possible to save labor and time for manual measurement using a scale or the like before burying the buried object, thus reducing the burden on the worker and making it possible to generate a drawing showing the laying state after completion of construction.

In addition, since the information of the buried object is included in the tag attached to the buried object, and the drawing is created based on the information contained in the mark, the on-site worker may make a mistake in describing the shape, size, etc. of the buried object. A decrease in reliability can be prevented.

According to the buried object management system described in ( 1 ), the mark is a two-dimensional arrangement of a plurality of cells having a predetermined color, and the combination of colors represents information on the buried object. Therefore, it is possible to read the information of the buried object (the shape, size, etc. of the buried object) by detecting the combination of colors of the signature in the image photographed by the photographing device. In addition, since a notch is provided for detecting the position of the region of the sign, even if the sign is tilted in the image captured by the photographing device, it is possible to accurately determine the top, bottom, left, and right of the sign. It is possible to read the information of the buried object that the mark has.

According to the buried object management system described in (5), it is possible to generate a drawing showing the laying state based on the relative coordinates. For example, when a gas pipe buried by civil engineering work is to be replaced in the future, if there is a drawing generated based on relative coordinates, the gas pipe can be measured from a predetermined reference position using a scale or the like. It becomes possible to specify the position of the tube.

According to the buried object management system described in (6), it is possible to generate a drawing showing the laying state based on the absolute coordinates. For example, when replacing a gas pipe buried in civil engineering work in the future, if there is a drawing generated based on absolute coordinates, the position of the gas pipe can be specified using a GPS device. becomes possible. At present, GPS equipment is expensive, so it is common practice to specify the position of gas pipes based on relative coordinates using a scale or the like. Increased usefulness.

According to the buried object management system described in (7), it is possible to generate a drawing showing the laying state based on relative coordinates and absolute coordinates. For example, when replacing a gas pipe buried by civil engineering work in the future, if there is a drawing generated based on relative coordinates and absolute coordinates, measure from a predetermined reference position with a scale or the like. Alternatively, the position of the gas pipe can be identified by using a GPS device. GPS devices are expensive, and it is conceivable that a plurality of such devices cannot be prepared. Then, if construction is to be carried out at a plurality of locations at the same time, there are sites where GPS equipment cannot be used. In such a case, if the gas pipe position can be specified by both relative coordinates and absolute coordinates, it can be handled flexibly.

1 is a block diagram showing an example of the configuration of a buried object management system; FIG. It is a figure which shows an example of a mode that a gas pipe is image|photographed using an imaging device. It is a figure which shows an example of the laying state of a gas pipe and a joint. (a) is a diagram showing an example of a two-dimensional code, and (b) is a diagram showing an example of cell colors and numbers corresponding to the colors. 2 is a list showing color combinations of cells of a two-dimensional code; 2 is a list showing color combinations of cells of a two-dimensional code; 2 is a list showing color combinations of cells of a two-dimensional code; 2 is a list showing color combinations of cells of a two-dimensional code; FIG. 10 is a diagram showing an example of a recognition method when cells of a two-dimensional code are integrated due to image processing; (a) is a diagram showing a case in which a part of the base of a two-dimensional code is lost and captured in a digital image, and (b) is a diagram showing a case in which a corner and a part of the base of the two-dimensional code are lost, resulting in a digital image. FIG. 10C, 10D, and 10E show an example of a case where the two-dimensional code is captured in an image, and (c), (d), and (e) show a case where a part of the horizontal end of the two-dimensional code is missing and captured in the digital image. It is a diagram. It is a correspondence table of the number sequence represented by the two-dimensional code and the gas pipe information. FIG. 2 is an image diagram of an orthoimage; FIG. 4 is a diagram showing an example of a method of calculating relative coordinates using an orthoimage; FIG. 3 is an image diagram of three-dimensional point cloud data; (a) is an image diagram of meshing, (b) is an image diagram of polygon data, and (c) is an image diagram of a state in which a digital image is attached to polygon data. It is an image diagram of a three-dimensional CAD drawing. It is a figure showing the modification of a two-dimensional code. It is a figure showing the modification of a two-dimensional code. It is a figure showing the modification of a two-dimensional code. It is a figure showing the modification of a two-dimensional code. It is a figure showing the modification of a two-dimensional code. It is a figure showing the modification of a two-dimensional code. It is a figure showing the modification of a two-dimensional code. It is a figure showing the modification of a two-dimensional code. It is a figure showing the modification of a two-dimensional code. It is a figure showing the modification of a two-dimensional code. It is a figure showing the modification of a two-dimensional code. It is a figure showing the modification of a two-dimensional code. It is a figure showing the modification of a two-dimensional code. It is a figure showing the modification of a two-dimensional code. FIG. 11 is a block diagram showing a modification of the configuration of the buried object management system; FIG. 11 is a block diagram showing a modification of the configuration of the buried object management system;

A first embodiment of a buried object management system 1 of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a block diagram showing an example of the configuration of a buried object management system 1 of this embodiment.
The photographing device 11 and the positioning device 12 are connected to the buried object management system 1 via a communication line 19 such as the Internet.

The photographing device 11 is a digital camera with which a worker at a construction site photographs the gas pipe 20 and the joint 21 as buried objects in order to obtain a digital image for creating a drawing, which will be described later. As shown in FIG. 2, a handle 11a is connected to the photographing device 11, and a worker at the construction site stands on the ground 30 and pulls the gas pipe installed in the installation groove 30a excavated during the civil engineering work. 20 can be photographed from above. The photographing is performed after the gas pipe 20 and the joint 21 are installed in the installation groove 30a but before they are embedded, and approximately 200 digital images are photographed in one day of construction. In the present embodiment, the operator himself/herself uses the photographing device 11 to photograph, but it is also possible to mount the photographing device 11 on a remote controllable unmanned aerial vehicle such as a drone and photograph from the sky. . Furthermore, the operator may hold the photographing device 11 in his/her hand to photograph. In this case, the photographing position is lower than when the handle 11a or the drone is used, and the photographing range becomes narrower.

A two-dimensional code 40 as a code is attached to the surfaces of the gas pipe 20 and the joint 21 disposed in the installation groove 30a (see FIG. 3). Then, the two-dimensional code 40 is also photographed.
The two-dimensional code 40 includes information such as the shape and size of the gas pipe 20 and the joint 21 (hereinafter referred to as gas pipe information), and the processing unit 16 described later recognizes the two-dimensional code 40 reflected in the digital image By doing so, information such as the shape and size of the gas pipe 20 and the joint 21 reflected in the digital image can be determined. Details of the two-dimensional code 40 will be described later.

The positioning device 12 works as a position information acquisition section of the buried object management system 1 together with a relative coordinate calculation section 161 which will be described later. A worker at the construction site can use the positioning device 12 to determine the absolute value of the two-dimensional code 40 attached to the gas pipe 20 and the joint 21 after the gas pipe 20 and the joint 21 are installed in the installation groove 30a and before the installation groove 30a. Get coordinates. Based on the position information acquired by the positioning device 12, a drawing generation unit 162, which will be described later, generates a drawing.

The imaging device 11 transmits the captured digital image to the buried object management system 1 via the communication line 19, and the positioning device 12 transmits the acquired absolute coordinate information to the buried object management system 1 through the communication line 19. do.

The buried object management system 1 includes a communication section 13 , a registration section 14 , a database 15 and a processing section 16 .

The communication unit 13 receives information about digital images and absolute coordinates transmitted from the imaging device 11 and the positioning device 12 . The information received by the communication unit 13 is registered in the database 15 by the registration unit 14 .

Gas pipe information is also registered in the database 15 in addition to the information on the registered digital images and absolute coordinates. The gas pipe information held by the two-dimensional code 40 is referred to, the corresponding gas pipe information is retrieved from the database, and a drawing containing the gas pipe information is generated in the processing unit 16 .

The processing unit 16 includes a relative coordinate calculation unit 161 and a drawing generation unit 162 .
The drawing generator 162 generates a drawing based on the digital image. Here, the drawings include three-dimensional point cloud data, three-dimensional mesh data, three-dimensional CAD drawings as three-dimensional drawings, orthoimages and two-dimensional CAD drawings as two-dimensional drawings, three-dimensional CAD drawings and two-dimensional It refers to vector data that is the basis of CAD drawings.

The drawing generation unit 162 generates drawings as follows.
First, three-dimensional point cloud data is generated based on a digital image. The three-dimensional point cloud data is a three-dimensional image of the gas pipe 20 and the joint 21 drawn by a set of points as shown in FIG. be able to.

Since the three-dimensional point cloud data draws the installation state with high accuracy, the data size is very large and may not operate smoothly on a general computer. Therefore, the drawing generator 162 can generate 3D mesh data with a smaller data size based on the 3D point cloud data.

The three-dimensional mesh data is a three-dimensional image of the gas pipe 20 and the joint 21 obtained by meshing the three-dimensional point cloud data (see FIG. 15(a)) and converting it into polygon data (see FIG. 15(b)). is drawn.
By generating three-dimensional mesh data with a smaller data size, it becomes possible to smoothly check the laying state of the gas pipe 20 and the joint 21 even with a general computer. A digital image can be pasted as a texture to the polygon data, and as shown in FIG.

Also, the drawing generation unit 162 can generate an orthorectified image based on the three-dimensional point cloud data.
An orthoimage is an orthographically projected image as shown in FIG. Since the digital image captured by the photographing device 11 is a central projection, the image on the digital image is distorted due to the difference in distance from the center of the lens of the photographing device 11 to the gas pipe 20 and the joint 21, which are objects to be photographed. occur. An orthoimage is an image obtained by converting such a central projection image into an orthographic projection and correcting the distortion. By generating a distortion-corrected orthoimage, it becomes possible to accurately measure the positions of the gas pipe 20 and the joint 21 on the orthoimage.

Furthermore, the drawing generator 162 can generate vector data based on any one of three-dimensional point cloud data, three-dimensional mesh data, and orthorectified images.
The vector data is a drawing that simply represents the laying state of the buried object using point data, line data, plane data, and body data of the gas pipe 20 and the joint 21 .
For example, if two straight gas pipes 20 are connected in series, and joints 21 are laid at three locations between the connected gas pipes 20 and at both ends, the vector data , points are plotted for each of the three joints 21 drawn on the three-dimensional point cloud data, three-dimensional mesh data, or orthoimage, and the three plotted points are connected by lines to simplify the installation state. to draw At this time, the plotting of the position of the joint 21 and the connection of the lines may be performed as automatic processing in the computer, or may be performed by the operator's operation on the screen of the computer. It is also possible to read the absolute coordinates acquired by the positioning device 12 from the database 15 and plot the joint 21 based on the absolute coordinates.
Vector data can hold gas pipe information as attributes of drawn lines and points.

The vector data is the same kind of data as the three-dimensional CAD drawing and the two-dimensional CAD drawing. It refers to a complete drawing in which the appearance and surrounding conditions (roads, buildings, etc.) are drawn, and will be explained separately from vector data.
For example, when outsourcing the creation of drawings to an external company, the rules for creating completed 3D CAD drawings and 2D CAD drawings (drawing frames, wording in drawings, etc.) may differ from company to company. , Between the requester and the requester, transactions are made only with vector data, which is a simple drawing, and 3D CAD drawings, which are completed drawings, and 2D CAD drawings may be produced by the requester. be. Therefore, even simple vector data is useful drawing data that is traded on its own.

Furthermore, the drawing generator 162 can generate a three-dimensional CAD drawing or a two-dimensional CAD drawing based on the vector data.
The three-dimensional CAD is, as shown in FIG. 16, a three-dimensional image of the gas pipe 20 and the joint 21 drawn by a three-dimensional function. Based on the vector data, a joint is drawn on the points plotted on the vector data, and the gas pipe 20 is drawn on the line connecting the points, thereby generating a three-dimensional CAD drawing. At this time, the types of the drawn gas pipe 20 and joint 21 are specified based on the gas pipe information represented by the two-dimensional code 40 . Since it is easy to edit the drawn contents, for example, the drawn gas pipe 20 and the joint 21 can be moved, enlarged, reduced, short-circuited, extended, etc. on the drawing, and future repairs can be performed on the drawing. Consideration is possible.

The three-dimensional CAD drawing can hold the gas pipe information of the gas pipe 20 and the joint 21 included in the two-dimensional code 40 as attributes of the gas pipe 20 and the joint 21 represented on the drawing. The following four methods are conceivable for the user of the drawing to confirm the gas pipe information stored in the three-dimensional CAD. The first is that when a gas pipe 20 on the drawing is clicked on the computer screen, a window containing the gas pipe information corresponding to the clicked gas pipe 20 opens and the user can confirm it. Method. Second, when the pointer of the mouse is brought close to the gas pipe 20, a small window containing the gas pipe information corresponding to the gas pipe 20 to which the pointer is brought is displayed near the pointer, which the user can confirm. the way it can be done. The third method is that the gas pipe information of each of the gas pipes 20 and joints 21 shown on the drawing is always displayed in an empty space on the drawing display screen so that the user can check it. . A fourth method is to output a list of gas pipe information separately from the drawing.
In this way, if the confirmation of gas pipe information can be facilitated by using a three-dimensional CAD drawing, the burden of acceptance inspection work after completion of construction and settlement work can be reduced.

It is also possible to create a multi-layer drawing in which two-dimensional drawing layers and three-dimensional drawing layers are superimposed. The display of the two-dimensional drawing and the display of the three-dimensional drawing can be switched as needed.

Next, a two-dimensional CAD drawing refers to a plan view, a cross-sectional view, a side view, etc., showing the laying state of the gas pipe 20 and the joint 21 . Based on the vector data, joints are drawn on points plotted on the vector data, and gas pipes 20 are drawn on lines connecting the points to generate a two-dimensional CAD drawing. At this time, the types of the drawn gas pipe 20 and joint 21 are specified based on the gas pipe information represented by the two-dimensional code 40 .

The two-dimensional CAD drawing can hold the gas pipe information of the gas pipe 20 and the joint 21 included in the two-dimensional code 40 as attributes of the gas pipe 20 and the joint 21 represented on the drawing. It is conceivable that the user of the drawing confirms the gas pipe information held in the two-dimensional CAD drawing by using the same four methods for confirming the gas pipe information held in the three-dimensional CAD drawing. .

It is also possible to create a multi-layer drawing in which layers of orthoimages and layers of two-dimensional CAD drawings are superimposed. It is possible to switch between the display of the orthoimage and the display of the two-dimensional CAD drawing as necessary.

In addition, the drawing generation unit 162 holds information about absolute coordinates acquired by the positioning device 12 in the above-described three-dimensional point cloud data, three-dimensional mesh data, orthoimages, three-dimensional CAD drawings, and two-dimensional CAD drawings. can be made By creating a drawing containing information on absolute coordinates, it becomes easy to manage what kind of buried object is buried where. For example, when replacing a gas pipe buried in civil engineering work in the future, if there is a drawing generated based on absolute coordinates, the position of the gas pipe can be specified using a GPS device. becomes possible.

Furthermore, the drawing generation unit 162 adds the relative coordinates calculated by the relative coordinate calculation unit 161 based on each drawing to the 3D point cloud data, 3D mesh data, orthoimage, 3D CAD drawing, and 2D CAD drawing. Information can be retained. If each of the above drawings has information on relative coordinates, if there is a drawing generated based on the relative coordinates when replacing the gas pipe buried by civil engineering work in the future, It is possible to specify the position of the gas pipe by measuring with a scale or the like from the reference position of .

The relative coordinate calculation unit 161 calculates the two-dimensional code 40 with respect to the reference position based on the three-dimensional point cloud data, three-dimensional mesh data, orthoimage, three-dimensional CAD drawing, and two-dimensional CAD drawing generated by the drawing generation unit 162. Calculate relative coordinates. For example, if a road intersection or the like is shown on the drawing, the relative coordinates of the two-dimensional code 40 can be calculated using the intersection as a reference position.

For example, to explain a method of calculating relative coordinates using an orthoimage, if a road intersection or the like is shown in the orthoimage, the relative coordinates of the two-dimensional code 40 can be calculated using the intersection as a reference position. .
If the reference position is not shown in the orthorectified image, for example, as shown in FIG. If not, a relay reference point 32 is provided near the buried object on the basis of the original reference position 31 at the construction site, and the relative coordinates of the relay reference point 32 with respect to the reference position 31 are measured. Then, the gas pipe 20 and the joint 21 including the relay reference point 32 are photographed by the photographing device 11 to create an orthorectified image. Then, if you want to know the position of an arbitrary point on the orthoimage, you can measure the relative position of that arbitrary point with respect to the relay reference point 32, and the relative coordinates of the relay reference point 32 from the reference position 31 can be obtained by positioning. , it is possible to calculate the relative coordinates based on the reference position 31 that is not in the orthorectified image.

Moreover, if the absolute coordinates of the two-dimensional code 40 and the intersection are acquired by the positioning device 12, the relative coordinate calculation unit 161 can also calculate the relative coordinates of any position based on the absolute coordinates. In addition, for example, when the two-dimensional code 40 is displayed in two places in the drawing generated by the drawing generation unit 162, the absolute coordinates of one two-dimensional code 40 and the absolute coordinates of the other two-dimensional code 40 , it is also possible to calculate the relative coordinates of the other two-dimensional code 40 using one of the two-dimensional codes 40 as a reference.

The three-dimensional point cloud data, three-dimensional mesh data, orthoimages, three-dimensional CAD drawings, and two-dimensional CAD drawings generated by the drawing generation unit 162 are used as completion drawings. Completion drawing is a revised design drawing based on design changes that occurred during construction. As described above, by generating a completion drawing containing position information such as relative coordinates and absolute coordinates and gas pipe information, the burden of acceptance inspection work and settlement work after completion of construction can be reduced. In addition, the as-built drawings record the laying status of gas pipes, etc. in the past construction work, and not only repair work of gas pipes to be done in the future, but also construction of sewage pipes, etc. It can be used when the construction is necessary and the location of the gas pipe must be taken into consideration.

Furthermore, the drawing generation unit 162 can generate geographic information system data by linking a three-dimensional CAD drawing or a two-dimensional CAD drawing with a geographic information system.
The geographic information system data is a visualization of the laying state of the gas pipes 20, etc. on a map based on a three-dimensional CAD drawing or a two-dimensional CAD drawing. is recorded. It is a record of all the laying conditions of gas pipes, etc. due to construction work done in the past, and it is necessary to carry out not only repair work of gas pipes to be done in the future, but also construction of sewer pipes, etc. underground. It can be used when it is construction work and consideration must be given to the location of gas pipes.

Next, the two-dimensional code 40 will be explained in detail.
For example, as shown in FIG. 4(a), the two-dimensional code 40 has five cells 401 arranged two-dimensionally and provided with a notch 404 to form a concave shape having corners 402 and a base 403. It is formed. Since the position of the region of the two-dimensional code 40 can be detected by providing the notch 404, the two-dimensional code 40 captured in the digital image captured by the imaging device 11 may be tilted or upside down. However, the processing unit 16 can distinguish the upper, lower, left, and right sides of the two-dimensional code 40 .

The cells 401 are made of a predetermined color, and in this embodiment are made of one of the three colors of red, blue and green. Note that the colors of the cells 401 are not limited to the three colors, and other colors may be set.

The two-dimensional code 40 can represent the gas pipe information of the gas pipe 20 and the joint 21 by a combination of three colors of red, blue and green.
More specifically, when the processing unit 16 reads information from the two-dimensional code 40, it reads the color of each cell 401 in the order indicated by the arrow Y in FIG. 4(a). Note that each cell 401 may be recognized in the order opposite to the direction indicated by the arrow Y. FIG. As shown in FIG. 4B, the number corresponding to red is 1, the number corresponding to blue is 2, and the number corresponding to green is 3. For example, as shown in FIG. Since the two-dimensional code 40 shown is arranged in the order of blue, red, red, red, and green, a numerical sequence of 21113 is obtained by assigning the numbers corresponding to each color. In the two-dimensional code 40 shown in FIG. 4(a), the corresponding numbers are written in the cells 401 in order to improve the visibility of the operator, and the numerical sequence represented by the two-dimensional code 40 is also displayed in the notch 404. However, it does not have to be displayed.

The two-dimensional code 40 shown in FIG. 4(a) is an example, and the two-dimensional code 40 is configured by arranging five cells 401 each having one of the three colors of red, blue, and green. A total of 243 combinations of number sequences can be created.

In the notch 404 shown in FIG. 4( a ), the number “5” written above the number sequence represented by the two-dimensional code 40 is the code number of the two-dimensional code 40 and the combination of colors of the cells 401 . from 1 to 243 for each.
Code numbers are assigned according to the rules shown in the tables of FIGS. 5, 6, 7 and 8. 5 and the top row of the table shown in FIG. 6 are vertically adjacent to each other, and the bottom row of the table shown in FIG. 6 and the top row of the table shown in FIG. 5, 6, 7, and 8 by vertically adjoining the bottom row of the table shown in FIG. 7 and the top row of the table shown in FIG. The table should be presented consecutively, but is split for convenience.

The two-dimensional code 40 shown in the tables of FIGS. 5, 6, 7 and 8 has a code number that increases by 1 in the horizontal direction of the table and by 9 in the vertical direction.
In the horizontal direction of the table, the colors of the left and right cells 401 forming the corner portion 402 are changed to "red-red", "red-blue", "red-green", and "red-green" while the color of the cell 401 forming the bottom portion 403 does not change. Blue-blue", "blue-green", "blue-red", "green-green", "green-red", and "green-blue".
In the vertical direction of the table, the color of the cells 401 forming the corner portion 402 remains unchanged, and the color and color position of the cells 401 forming the bottom portion 403 change.
The vertical items "blue x 1", "blue x 2", and "blue x 3" represent the number of blue cells 401 forming the bottom part 403, and "green x 1", "green x 3" in FIG. x2” and “green x3” similarly indicate the number of green cells 401 .
"Two colors" in FIG. 7 means having cells 401 of two colors, blue and green, in addition to the red cell 401 . The reason why red is not included in the number of colors is that it is based on the fact that the bottom part 403 of code number 1 is composed only of red.
Furthermore, "blue x 2 + 2 colors" in Fig. 8 means that the number of blue cells 401 is two and consists of two colors, blue and green. Similarly, "green x 2+2 colors" means that the number of green cells 401 is two and that the color consists of two colors, blue and green.
By arranging the cells 401 according to the rules as shown in FIGS. 5, 6, 7, and 8, it is expected that the visibility for workers on site will be improved.

The rules for arranging the cells 401 are not limited to the examples shown in FIGS. For example, the sequence "11111" represented by the two-dimensional code 40 is code number 1, "11112" is code number 2, "11113" is code number 3, "11121" is code number 4, and "11122" is code number 5. Another method is to increase the code number as the number sequence represented by the two-dimensional code 40 increases in ternary notation.

Then, if the gas pipe information is determined for each sequence, the processing unit 16 recognizes the two-dimensional code 40, thereby extracting the corresponding gas pipe information from among the gas pipe information stored in the database 15. becomes possible.

The gas pipe information stored in the database 15 is in a state corresponding to the numerical sequence represented by the two-dimensional code 40, as shown in the table shown in FIG. 11, for example.
In this embodiment, the gas pipe information consists of "model number", "type", "name", "material", "size", "extension", and "price" of the gas pipe 20 and joint 21. .

The “model number” is an individual number for identifying the gas pipe 20 and joint 21 . Although represented by a numerical sequence here, it may be represented by a character string consisting of only alphabetic characters or alphanumeric characters.

“Type” indicates whether the buried object is the gas pipe 20 or the joint 21 . Although they are simply expressed as "pipe" or "joint" here, they may be expressed by symbols or letters.

The "name" indicates the type of the gas pipe 20 or the joint 21, and is expressed as "PE straight pipe" or "welded steel straight pipe" here, but may be expressed by symbols or letters.

“Material” represents the material that constitutes the gas pipe 20 and the joint 21 . Here, "polyethylene" and "steel" are used, but symbols and letters may be used.

"Size" represents the diameter of the gas pipe 20 and the joint 21 . Although nominal diameters such as 75A and 200A are used here, actual dimensional values may be used.

“Extension” represents the length of the gas pipe 20 and the joint 21 . Although 5 m, 5.5 m, etc. are described here, the unit may be mm.

“Amount” represents the price of the gas pipe 20 and the joint 21 . The unit is yen, and here, it is represented by "2000", "50000", etc., but it may be represented by a unit of 1,000 yen.

Note that the above gas pipe information is an example, and is not limited to the items shown in FIG. 11 . For example, since it is empirically known how much labor costs are required for burying the gas pipe 20 and the joint 21, it is possible to include information on labor costs. If information about labor costs is included in the drawing generated by the drawing generation unit 162 as the gas pipe information, the calculation of the construction cost is facilitated. Since the construction cost here is calculated based on the wages that are grasped empirically, it can be said that the construction cost is a rough estimate. Accurate construction costs depend on how deep the ground 30 is excavated when laying the gas pipe 20 and the joint 21 . Therefore, an accurate construction cost can be calculated based on three-dimensional point cloud data, three-dimensional mesh data, three-dimensional CAD drawings, and two-dimensional CAD drawings having information on the depth of the installation groove 30a.

Next, a procedure for the processing section 16 to recognize the two-dimensional code 40 will be described.
Normally, first, the concave shape of the two-dimensional code 40 captured in the digital image captured by the imaging device 11 is recognized, and the orientation of the two-dimensional code 40 is confirmed. Thereby, the positions of the corner portion 402 and the bottom portion 403 are determined. Then, the color of each cell 401 is read in the order indicated by the arrow Y, and the number sequence represented by the two-dimensional code 40 is derived from the number corresponding to each color.

However, due to the image processing, the gaps between the cells 401 may be filled and the cells 401 may be integrated as shown in FIG. 9A.
In such a case, first, the concave shape of the two-dimensional code 40 is recognized, and the orientation of the two-dimensional code 40 is confirmed. Then, it is divided into five cells 401 based on the notch 404 . For example, as shown in FIG. 9(b), it is divided into five cells by a dividing line 405 provided with a notch 404 as a reference.
By dividing into five cells 401, it becomes possible to recognize what color each of the five cells is, and to derive the numerical sequence represented by the two-dimensional code 40 from the number corresponding to each color.

In addition, since the gas pipe 20 and the joint 21 are cylindrical, the two-dimensional code 40 attached to the gas pipe 20 and the joint 21 is curled following the cylindrical shape. Then, as shown in FIGS. 10(a) to 10(e), when photographed by the photographing device 11, there is a risk that the entire two-dimensional code 40 will not be photographed and part of it will be lost (hereinafter referred to as the lost code 40). The portion is called a missing portion 406). In such a case, recognition of the two-dimensional code 40 is performed as follows.

First, as shown in FIGS. 10A and 10B, a case where a corner 402 and a part of a base 403 are cut off 406 will be described.
First, the concave shape is recognized and the orientation of the two-dimensional code 40 is confirmed. Thereby, the positions of the corner portion 402 and the bottom portion 403 are determined.
Then, it recognizes how many colors the two-dimensional code 40 is composed of. In the example shown in FIGS. 10(a) and 10(b), it is recognized that it is composed of two colors, blue and red.
Next, the color of the corner 402 is recognized. In the example shown in FIGS. 10(a) and 10(b), it is recognized that both left and right are blue.
After that, the colors forming the bottom part 403 are recognized. In the example shown in FIGS. 10A and 10B, it is recognized that the bottom part 403 is composed of blue and red.
After recognizing the colors forming the bottom part 403, the length of the colors forming the bottom part 403 in the horizontal direction in the drawing is recognized. In the examples shown in FIGS. 10A and 10B, blue is one cell long and red is two cells long. As a result, even if part of the bottom portion 403 is missing, it is possible to recognize the order of colors of the three cells 401 forming the bottom portion 403 .
As described above, the two-dimensional code 40 shown in FIGS. 10(a) and 10(b) is composed of blue, blue, red, red, and blue in the order of the arrow Y in FIG. 4(a). can be recognized, and the number sequence represented by the two-dimensional code 40 can be derived from the numbers corresponding to each color.

Next, as shown in FIGS. 10(c), 10(d), and 10(e), a description will be given of the case where the two-dimensional code 40 has a missing portion 406 at the lateral end of the drawing.
First, the concave shape is recognized and the orientation of the two-dimensional code 40 is confirmed. Thereby, the positions of the corner portion 402 and the bottom portion 403 are determined.
Then, it recognizes how many colors the two-dimensional code 40 is composed of.
In the examples shown in FIGS. 10(c), (d), and (e), it is recognized that the two-dimensional code 40 is composed of two colors, blue and red.
Next, the color of the corner 402 is recognized. In the examples shown in FIGS. 10(c), (d), and (e), it is recognized that both left and right are blue.
After that, the colors forming the bottom part 403 are recognized. In the examples shown in FIGS. 10(c), (d), and (e), it is recognized that they are composed of blue and red.

After recognizing the colors forming the bottom part 403, the length of the colors forming the bottom part 403 in the horizontal direction in the drawing is recognized. In the example shown in FIG. 10C, blue has a length of 0.5 cells due to loss, and red has a length of 2 cells. In the example shown in FIG. 10(d), blue has a length of 1 cell, and red has a length of 1.5 cells due to loss. In the example shown in FIG. 10(e), the blue color has a length of 0.5 cells and the red color has a length of 1.5 cells due to the loss.
Next, the length of the corner portion 402 in the horizontal direction in the figure is recognized. In the example shown in FIG. 10C, the blue on the left has a length of 0.5 cells due to the loss, and the blue on the right has a length of one cell. In the example shown in FIG. 10D, the blue on the left has a length of one cell, and the blue on the right has a length of 0.5 cells due to loss. In the example shown in FIG. 10(e), the length of the blue color is 0.5 cells due to defects on both the left and right sides.

By recognizing the length of the bottom portion 403 in the horizontal direction in the drawing and the length of the corner portion 402 in the horizontal direction in the drawing, it is possible to determine how much the left and right sides of the two-dimensional code 40 are missing. Calculate the defect length. In the example shown in FIG. 10(c), both the corner portion 402 and the bottom portion 403 are missing 0.5 cells on the left side, so it is calculated that the entire two-dimensional code 40 is missing 0.5 cells on the left side. be done. Similarly, in the example shown in FIG. 10(d), it is calculated that 0.5 cells are missing on the right side of the two-dimensional code 40, and in the example shown in FIG. is missing for 0.5 cells.

Based on the calculated missing length, the horizontal length of the base portion 403 is corrected, and the number of cells of each color forming the base portion 403 is recognized. In the example shown in FIG. 10C, 0.5 cell loss on the left side of the base portion 403 is corrected. In the example shown in FIG. 10D, 0.5 cell loss on the right side of the base portion 403 is corrected. In the example shown in FIG. 10E, 0.5 cells worth of defects on the left and right sides of the base portion 403 are corrected. This correction makes it possible to recognize that the bottom portion 403 of the two-dimensional code 40 shown in FIGS. 10(c), (d), and (e) is composed of one blue cell and two red cells. Become. Note that the corner 402 does not need to be corrected because it is sufficient to recognize the color of each of the left and right corners.
As described above, the two-dimensional code 40 shown in FIGS. 10(c), (d), and (e) is composed of blue, blue, red, red, and blue in the order of the arrow Y in FIG. 4(a). It becomes possible to recognize that
As described above, according to the two-dimensional code 40, it is possible to recognize the content represented by the two-dimensional code 40 even if it is partially missing.

Also, the arrangement pattern of the cells 401 is not limited to the concave shape of the two-dimensional code 40 .
As shown in FIG. 17, by arranging six cells 401 two-dimensionally and providing cutouts 404, it is possible to form a two-dimensional code 41 in a substantially concave shape. By providing the notch 404 , the processing unit 16 can determine the top, bottom, left, and right of the two-dimensional code 41 . Then, the color of each cell 401 is read in the order indicated by the arrow Y, and the sequence represented by the two-dimensional code 41 can be derived from the number corresponding to each color.
According to the two-dimensional code 41, since it is configured by arranging six cells 401 each having one of three colors of red, blue, and green, a total of 729 combinations of number sequences can be obtained. can be made.

As a modification of the substantially concave shape, there are other array patterns of cells 401 such as two-dimensional codes 42, 43, 44 and 45 shown in FIGS. 18, 19, 20 and 21. The notch 404 allows the processing unit 16 to determine the top, bottom, left, and right of the two-dimensional codes 42 , 43 , 44 , 45 . Then, the color of each cell 401 is read in the order indicated by the arrow Y, and the sequence represented by the two-dimensional codes 42, 43, 44, and 45 can be derived from the number corresponding to each color.
According to the two-dimensional code 42, since it is composed of six cells 401 each having one of the three colors of red, blue, and green, a total of 729 combinations of number sequences can be obtained. can be made.
According to the two-dimensional codes 43 and 44, since it is composed of 7 cells 401 arranged in any one of three colors of red, blue, and green, a total of 2187 combinations of number sequences can be obtained. can be made.
According to the two-dimensional code 45, it consists of 8 cells 401 arranged in any one of the three colors of red, blue, and green. can be done.

In addition to the substantially concave shape, as shown in FIG. 22, by arranging three cells 401 two-dimensionally and providing a notch 404, it is also possible to form a two-dimensional code 46 in an L-shape. is. By providing the notch 404 , the processing unit 16 can determine the top, bottom, left, and right of the two-dimensional code 46 . Then, the color of each cell 401 is read in the order indicated by the arrow Y, and the sequence represented by the two-dimensional code 46 is derived from the number corresponding to each color.
In addition, according to the two-dimensional code 46, since it is configured by arranging three cells 401 each having one of the three colors of red, blue, and green, a total of 27 combinations of number sequences can be obtained. can be made.

As a modification of the L-shape, other array patterns of cells 401 such as two-dimensional codes 47, 48, 49 and 50 shown in FIGS. 23, 24, 25 and 26 can be considered. The notch 404 allows the processing unit 16 to determine the top, bottom, left, and right of the two-dimensional codes 47 , 48 , 49 , 50 . Then, the color of each cell 401 is read in the order indicated by the arrow Y, and the number sequence represented by the two-dimensional codes 47, 48, 49, 50 can be derived from the number corresponding to each color.
According to the two-dimensional code 47, since it is configured by arranging four cells 401 each having one of three colors of red, blue, and green, a total of 81 combinations of number sequences can be obtained. can be made.
According to the two-dimensional code 48, it consists of 6 rows of cells 401 each of which is one of the three colors of red, blue, and green. can be done.
According to the two-dimensional codes 49 and 50, since it is configured by arranging seven cells 401 each having one of the three colors of red, blue, and green, there are a total of 2187 combinations of number sequences. can be made.

As another modification, it is possible to arrange the cells 401 like the two-dimensional codes 51, 52, 53 and 54 shown in FIGS. 27, 28, 29 and 30. FIG.
The two-dimensional code 51 is formed by arranging seven cells 401 in a substantially square shape, and the processing unit 16 can determine the top, bottom, left, and right of the two-dimensional code 51 by the cutouts 404 arranged at the corners. It becomes possible. Then, the color of each cell 401 is read in the order indicated by the arrow Y, and the sequence represented by the two-dimensional code 51 is derived from the number corresponding to each color.

The two-dimensional code 52 has seven cells 401 arranged in a substantially hook shape. The notch 404 enables the processing unit 16 to determine the top, bottom, left, and right of the two-dimensional code 52 . Then, the color of each cell 401 is read in the order indicated by the arrow Y, and the number sequence represented by the two-dimensional code 52 is derived from the number corresponding to each color.

The two-dimensional code 53 is formed by two-dimensionally arranging six cells 401 in a substantially V shape. The notch 404 enables the processing unit 16 to determine the top, bottom, left, and right of the two-dimensional code 53 . Then, the color of each cell 401 is read in order of the number displayed in the cell 401, and the sequence represented by the two-dimensional code 53 is derived from the number corresponding to each color. It should be noted that the numbers displayed in the cell 401 are shown for convenience of explanation, and need not be displayed in the cell 401 .

The two-dimensional code 54 is formed by two-dimensionally arranging seven cells 401 in a substantially V shape. The notch 404 enables the processing unit 16 to determine the top, bottom, left, and right of the two-dimensional code 54 . Then, the color of each cell 401 is read in order of the number displayed in the cell 401, and the sequence represented by the two-dimensional code 54 is derived from the number corresponding to each color. It should be noted that the numbers displayed in the cell 401 are shown for convenience of explanation, and need not be displayed in the cell 401 .

The colors of the cells 401 forming the two-dimensional codes 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, and 54 are red, blue, and green. The colors are not limited, and other colors may be set.

Next, the operation of the buried object management system 1 of this embodiment will be described.
The gas pipe 20 and the joint 21 arranged in the installation groove 30a are photographed by the photographing device 11 before embedding, and a digital image is obtained. Then, the acquired digital image is transmitted to the buried object management system 1 via the communication line 19 .
Then, the absolute coordinates of the two-dimensional code 40 attached to the gas pipe 20 and the joint 21 arranged in the installation groove 30a are acquired by the positioning device 12 before embedding. Information about the acquired absolute coordinates is transmitted to the buried object management system 1 via the communication line 19 . The above is performed by the worker at the construction site.

The communication unit 13 receives the transmitted digital image and information about the absolute coordinates. The information about the received digital image and the absolute coordinates is registered in the database 15 by the registration unit 14 .

Then, the processing unit 16 reads out the digital image from the database 15, and the drawing generation unit 162 first generates three-dimensional point cloud data based on the digital image. 3D mesh data and orthoimages can be generated based on 3D point cloud data, and vector data can be generated based on any of 3D point cloud data, 3D mesh data, and orthoimages. is. When generating vector data, the gas pipe information corresponding to the sequence represented by the two-dimensional code 40 is read from the database 15, and the gas pipe information is stored in the vector data. Moreover, it is possible to generate a three-dimensional CAD drawing or a two-dimensional CAD drawing based on the vector data, and furthermore it is possible to generate geographic information system data based on the three-dimensional CAD drawing or the two-dimensional CAD drawing. .
When generating each drawing, the drawing generation unit 162 reads out information about the absolute coordinates from the database 15 and causes the drawing to retain the information. Also, the relative coordinate calculation unit 161 calculates the relative coordinates of the two-dimensional code 40 based on the drawing generated by the drawing generation unit 162, and the drawing generation unit 162 causes the drawing to retain information about the relative coordinates.

The user of the buried object management system 1 arbitrarily selects necessary data from among three-dimensional point cloud data, three-dimensional mesh data, orthoimages, vector data, three-dimensional CAD drawings, and two-dimensional CAD drawings. It is also possible to create additional drawings such as creating a three-dimensional CAD drawing after creating a two-dimensional CAD drawing.

After the drawing generation is completed, the generated drawing is stored in the database 15 . In addition, the saved drawings can be read and used as necessary, such as for acceptance inspection work and settlement work after completion of construction. Furthermore, it can be used for repair work of gas pipes 20 and joints 21 that will be carried out in the future, and it is necessary to carry out underground work such as sewage pipe work, so the position of gas pipes must be considered. It can also be used in other cases.

As described above, according to the buried object management system 1 of the first embodiment,
(1) In a buried object management system 1 that manages the laying state of buried objects buried in the ground by civil engineering work after construction is completed, gas pipes 20 and joints 21 are placed at predetermined positions on the surface, and at least gas pipes 20 and a two-dimensional code 40 including information on the shape and size of the gas pipe 20 and the joint 21, and a digital image containing at least the two-dimensional code 40 after the gas pipe 20 and the joint 21 are placed in the ground and before they are embedded. , a position information acquisition unit (positioning device 12, relative coordinate calculation unit 161) for acquiring position information of the two-dimensional code 40, information included in the two-dimensional code 40 included in the digital image, and the position and a drawing generation unit 162 that generates a drawing representing the laying state that holds the position information acquired by the information acquisition unit (positioning device 12, relative coordinate calculation unit 161). By being able to efficiently record the laying state before embedding the object, it is possible to reduce the burden on the worker and generate a highly reliable drawing showing the laying state after the completion of construction.

For example, a two-dimensional code 40 containing gas pipe information such as the shape and size of the buried object is affixed to the gas pipe 20 and joint 21 . Then, if a digital image including at least the two-dimensional code 40 is acquired by the photographing device 11, and the position information of the two-dimensional code 40 is acquired by the position information acquisition unit (the positioning device 12 and the relative coordinate calculation unit 161), , the drawing generation unit 162 generates a drawing showing the installation state based on the information included in the two-dimensional code 40 included in the digital image and the position information acquired by the position information acquisition unit (positioning device 12, relative coordinate calculation unit 161). can be generated, for example, the position of the joint 21 is plotted based on the acquired position information of the two-dimensional code 40 of the joint 21, the plotted points are connected with straight lines, and the plotted A drawing can be generated by drawing a joint 21 on a point and a gas pipe 20 on a straight line connecting the points. At this time, the drawn gas pipes 20 and joints 21 are specified based on the gas pipe information of the gas pipes and joints of the two-dimensional code 40 .
Therefore, it is possible to save labor and time for manual measurement using a scale or the like before burying the gas pipe 20 and the joint 21, thus reducing the burden on workers and making it possible to generate a drawing showing the installation state after completion of construction. is.

(2) In the buried object management system 1 described in (1), the two-dimensional code 40 is a two-dimensional arrangement of a plurality of cells 401 having a predetermined color, and the position of the marked area is indicated by The notch 404 for detection is provided, and the information of the buried object is represented by a combination of colors. By detecting the combination, the gas pipe information of the gas pipe 20 and the joint 21 can be read. In addition, since the notch portion 404 for detecting the position of the area of the two-dimensional code 40 is provided, even if the two-dimensional code 40 in the image captured by the imaging device 11 is tilted, the two-dimensional code 40 can be detected. It is possible to distinguish up, down, left, and right, and it is possible to accurately read the gas pipe information of the two-dimensional code 40 .

(3) In the buried object management system 1 described in (1) or (2), the drawings are characterized by including at least as-built drawings. As-built drawings can be generated.
(4) In the buried object management system 1 according to any one of (1) to (3), the drawings include at least geographic information system data. It is possible to reduce and generate reliable Geographic Information System data.

(7) In the buried object management system 1 described in any one of (1) to (4), the position information acquisition unit is configured to generate two-dimensional code data corresponding to a predetermined reference position based on the image captured by the imaging device. 40, and a positioning device 12 for obtaining the absolute coordinates of the mark after the gas pipe 20 and the joint 21 are placed in the ground and before they are embedded. , the position information includes relative coordinates and absolute coordinates, so that a drawing showing the laying state can be generated based on the relative coordinates and the absolute coordinates. For example, when replacing a gas pipe buried by civil engineering work in the future, if there is a drawing generated based on relative coordinates and absolute coordinates, measure from a predetermined reference position with a scale or the like. Alternatively, the position of the gas pipe can be identified by using a GPS device. GPS devices are expensive, and it is conceivable that a plurality of such devices cannot be prepared. Then, if construction is to be carried out at a plurality of locations at the same time, there are sites where GPS equipment cannot be used. In such a case, if the gas pipe position can be specified by both relative coordinates and absolute coordinates, it can be handled flexibly.

Next, a buried object management system 2 according to a second embodiment will be described.
The difference from the buried object management system 1 according to the first embodiment is that, as shown in FIG. The point is that
The drawing generator 162 generates a drawing based on the relative coordinates and the gas pipe information represented by the two-dimensional code 40 .
Also, the information held in the drawing is relative coordinates and gas pipe information, and does not include information on absolute coordinates.
Others are the same as those of the buried object management system 1 according to the first embodiment.

As described above, according to the buried object management system 1 of the second embodiment,
(5) In the buried object management system 2 described in any one of (1) to (4), the positional information acquiring unit, based on the image captured by the imaging device 11, is a two-dimensional image with respect to a predetermined reference position. It is characterized by comprising a relative coordinate calculation unit 161 for calculating the relative coordinates of the code 40 and at least the relative coordinates being included in the position information. can be done. For example, when the gas pipe 20 buried by civil engineering work is to be replaced in the future, if there is a drawing generated based on relative coordinates, by measuring from a predetermined reference position with a scale or the like, It becomes possible to identify the position of the gas pipe 20 .

Next, a buried object management system 3 according to a third embodiment will be described.
The difference from the buried object management system 1 according to the first embodiment is that, as shown in FIG. The point is that it is composed only of
The drawing generator 162 generates a drawing based on the gas pipe information represented by the absolute coordinates and the two-dimensional code 40 .
Since relative coordinates are not calculated, orthorectified images are not generated in the drawing generation process.
Also, the information held in the drawing is absolute coordinates and gas pipe information, and information on relative coordinates is not included.
Others are the same as those of the buried object management system 1 according to the first embodiment.

As described above, according to the buried object management system 1 of the third embodiment,
(6) In the buried object management system 3 according to any one of (1) to (4), the position information acquisition unit acquires a two-dimensional Since it is characterized by comprising the positioning device 12 for acquiring the absolute coordinates of the code 40 and at least the absolute coordinates being included in the position information, it is possible to generate a drawing showing the laying state based on the absolute coordinates. . For example, when the gas pipe 20 buried by civil engineering work is to be replaced in the future, the position of the gas pipe 20 can be identified by using a GPS device if there is a drawing generated based on absolute coordinates. It becomes possible to At present, GPS equipment is expensive, so it is common practice to specify the position of gas pipes based on relative coordinates using a scale or the like. Increased usefulness.

It should be noted that the above-described first to third embodiments are merely examples, and do not limit the present invention in any way. Therefore, the present invention can naturally be improved and modified in various ways without departing from the scope of the invention.
For example, in the above first to third embodiments, the communication unit 13 receives digital images acquired by the imaging device 11 and absolute coordinates acquired by the positioning device 12 via the communication line 19 such as the Internet. However, it is also possible to input digital images acquired by the imaging device 11 and absolute coordinates acquired by the positioning device 12 to the buried object management system 1 using a wired connection or a storage medium such as a memory card. .
Further, in the first to third embodiments, the relative coordinate calculation unit 161 is part of the processing unit 16. It is good to be able to do so.

1 buried object management system 11 imaging device 12 positioning device 20 gas pipe 21 joint 40 two-dimensional code 161 relative coordinate calculator 162 drawing generator

Claims (4)

In the buried object management system that manages the laying condition of the buried objects buried in the ground by civil engineering work after completion of construction,
The embedded object has a mark at a predetermined position on the surface thereof, which includes at least information on the shape and size of the embedded object;
a photographing device for photographing an image including at least the signature after the buried object is placed in the ground and before the buried object is embedded;
a communication unit capable of communicating with the photographing device;
a drawing generation unit that generates a drawing representing the installation state, which holds information included in the symbol included in the image, based on the image acquired from the photographing device via the communication unit;
to provide
Said sign is
A plurality of cells having a predetermined color are arranged two-dimensionally, provided with a notch for detecting the position of the area of the mark, and representing the information of the buried object by a combination of colors. to be
the cells are located in each area divided by dividing lines based on the shape of the notch;
the buried object has a cylindrical shape;
When the mark contained in the image is damaged by the mark being rolled up following the cylindrical shape, the buried object management system confirms the orientation of the mark by the notch portion, and removes the mark. by recognizing the horizontal length of the cell array, calculating the size of the defect of the symbol from the length, and correcting the symbol according to the calculated size of the defect, to recognize,
A buried object management system characterized by: In the buried object management system according to claim 1 ,
comprising a position information acquisition unit;
The position information acquisition unit comprises a relative coordinate calculation unit that calculates the relative coordinates of the mark from a distance from a predetermined reference position in the image, based on the image captured by the image capturing device.
the drawing includes information on the relative coordinates;
A buried object management system characterized by: In the buried object management system according to claim 1 ,
comprising a position information acquisition unit;
The position information acquisition unit acquires the absolute coordinates of the code using GPS after the buried object is placed in the ground and before the buried object is embedded, and the absolute coordinates are transferred to the buried object via the communication unit. consisting of a positioning device that transmits to an object management system;
the drawing includes information of the absolute coordinates;
A buried object management system characterized by: In the buried object management system according to claim 1 ,
comprising a position information acquisition unit;
The position information acquisition unit includes a relative coordinate calculation unit that calculates relative coordinates of the mark from a distance from a predetermined reference position in the image, based on the image captured by the image capturing device; a positioning device that acquires the absolute coordinates of the sign using GPS after it is placed inside and before it is embedded, and transmits the absolute coordinates to the buried object management system via the communication unit. matter,
the drawing includes information on the relative coordinates and the absolute coordinates;
A buried object management system characterized by:

Images