In-BIM-model horizontal construction diagram arrangement system, in-BIM-model horizontal construction diagram arrangement method, and program

Abstract

[Problem] To improve efficiency in managing construction progress. [Solution] An in-BIM-model horizontal construction diagram arrangement system for arranging a two-dimensional construction diagram in a three-dimensional BIM model: acquires, in regard to a building of interest, three-dimensional BIM data, attribute information, and a horizontal two-dimensional construction diagram that is a two-dimensional construction diagram in the horizontal direction of the building; aligns the horizontal coordinates, orientations, and scales of the three-dimensional BIM data and the horizontal two-dimensional construction diagram on the basis of the attribute information; and, on the basis of the result of alignment, horizontally arranges the horizontal two-dimensional construction diagram at a position aligned within a three-dimensional BIM model generated on the basis of the three-dimensional BIM data.

Description

BIM Model Horizontal Construction Drawing Arrangement System, BIM Model Horizontal Construction Drawing Arrangement Method, and Program

[0001] The present invention relates to a technology effective for matching a three-dimensional BIM ((Building Information Modelling)) model of a building with a two-dimensional construction plan.

[0002] Technologies related to BIM in the construction field have attracted attention. For example, in Patent Document 1, a technology is provided that enables easy and accurate inspection by displaying an image in which a photographed image of a structure to be inspected is superimposed on a three-dimensional model generated from design information. Additionally, in another example, Patent Document 2 provides a technology for generating an image that enables easy understanding of the structural elements of a building.

[0003] Japanese Patent Application Laid-Open No. 2019-191927 Japanese Patent Application Laid-Open No. 2024-080360

[0004] In the construction field, a three-dimensional BIM model, which is a three-dimensional model of a building generated on a computer called BIM, is used to improve the efficiency of construction operations. Also, at a construction site, a horizontal two-dimensional construction drawing, which is a two-dimensional construction drawing in the horizontal direction of rooms on the same floor, etc., is also used in combination for managing the horizontal construction progress. However, relying solely on the three-dimensional BIM model makes it time-consuming to confirm the construction progress, and it is difficult to manage the construction progress instantaneously at the construction site using only the three-dimensional BIM model. Additionally, since the horizontal two-dimensional construction drawing is often used in combination to grasp the construction progress, it has been difficult to manage the construction progress by matching the three-dimensional BIM model of the target building with the horizontal two-dimensional construction drawing. Therefore, a technology for matching the three-dimensional BIM model of the target building with the horizontal two-dimensional construction drawing has been demanded. However, with the technologies described in Patent Documents 1 and 2, it has been impossible to match the three-dimensional BIM model of the target building with the horizontal two-dimensional construction drawing. Thus, the inventor focused on a mechanism for horizontally arranging the horizontal two-dimensional construction drawing within the three-dimensional BIM model of the target building and matching the three-dimensional BIM model with the horizontal two-dimensional construction drawing.

[0005] In view of these problems, the present invention aims to provide a BIM model horizontal construction drawing placement system, a BIM model horizontal construction drawing placement method, and a program that enable easy matching of the 3D BIM model and the horizontal 2D construction drawing of a target building by horizontally placing the horizontal 2D construction drawing at a position where the horizontal coordinates, orientation, and scale of the 3D BIM data and the horizontal 2D construction drawing are aligned within the 3D BIM model, thereby improving the efficiency of construction progress management.

[0006] The present invention provides a BIM model horizontal construction drawing placement system for placing two-dimensional construction drawings within a three-dimensional BIM model, comprising: an acquisition unit that acquires three-dimensional BIM data, attribute information, and a horizontal two-dimensional construction drawing which is a two-dimensional construction drawing in the horizontal direction of a target building; an alignment unit that aligns the horizontal coordinates, orientation, and scale of the three-dimensional BIM data and the horizontal two-dimensional construction drawing based on the attribute information; and a drawing placement unit that horizontally places the horizontal two-dimensional construction drawing at the aligned position within the three-dimensional BIM model generated based on the three-dimensional BIM data, based on the result of the alignment.

[0007] According to the present invention, by horizontally positioning a two-dimensional construction drawing at a location where the horizontal coordinates, orientation, and scale of the three-dimensional BIM data and the horizontal two-dimensional construction drawing are aligned within the three-dimensional BIM model, it becomes easier to compare the three-dimensional BIM model and the horizontal two-dimensional construction drawing of the target building, thereby improving the efficiency of construction progress management.

[0008] Although this invention falls under the category of a system, similar effects and benefits can be achieved with methods and programs.

[0009] According to the present invention, it becomes possible to improve the efficiency of managing construction progress.

[0010] This diagram illustrates the overview of the BIM model horizontal construction drawing placement system 1. This diagram shows the functional configuration of the BIM model horizontal construction drawing placement system 1. This diagram shows the flowchart of the drawing placement process performed by the BIM model horizontal construction drawing placement system 1. This diagram schematically shows a horizontal two-dimensional construction drawing. This diagram schematically shows a three-dimensional BIM model. This diagram schematically shows the method for determining the ground clearance of measurement points. This diagram schematically shows the method for converting the coordinates of measurement points from paper coordinates to model coordinates. This diagram schematically shows a three-dimensional BIM model with horizontal two-dimensional construction drawings and grid lines placed. This diagram shows the flowchart of the altitude placement process performed by the BIM model horizontal construction drawing placement system 1. This diagram shows the flowchart of the altitude change process performed by the BIM model horizontal construction drawing placement system 1. This diagram shows the flowchart of the icon placement process performed by the BIM model horizontal construction drawing placement system 1.

[0011] Hereinafter, embodiments for carrying out the present invention will be described in detail with reference to the attached drawings. In the following drawings, the same elements are denoted by the same numbers or reference numerals throughout the description of the embodiments.

[0012] [Overview of the Horizontal Construction Drawing Placement System 1 within the BIM Model] Figure 1 is a schematic diagram illustrating the overview of the Horizontal Construction Drawing Placement System 1 within the BIM Model. Based on Figure 1, the components of the Horizontal Construction Drawing Placement System 1 within the BIM Model will be described. The Horizontal Construction Drawing Placement System 1 within the BIM Model is a system for placing 2D construction drawings within a 3D BIM model that consists of at least an information terminal 3 used by users such as construction workers and managers who manage construction progress, and a computer 10 with server functionality.

[0013] Information terminal 3 is a terminal device used by the user, and may include, for example, mobile phones, smartphones, tablet devices, personal computers, laptop computers, or wearable devices such as smartwatches, smart glasses, and HMDs (Head Mounted Displays).

[0014] Computer 10 has server functionality and may be implemented using, for example, a single computer, or multiple computers, like a cloud computer. In this specification, a cloud computer may be one that uses any computer scalably to perform a specific function, or one that includes multiple functional modules to implement a certain system and uses those functions in any combination.

[0015] Furthermore, the BIM model horizontal construction drawing placement system 1 may include other terminals and devices such as external systems, in addition to the information terminal 3 and computer 10 mentioned above. The number, types, and functions of these devices are not particularly limited and can be designed as appropriate.

[0016] This section outlines the processing steps involved when the BIM model horizontal construction drawing placement system 1 places two-dimensional construction drawings within a three-dimensional BIM model.

[0017] Computer 10 acquires 3D BIM data, attribute information, and horizontal 2D construction drawings of the target building (step S1). Computer 10 acquires 3D BIM data, attribute information, and horizontal 2D construction drawings from an external system (not shown) or an information terminal 3, etc.

[0018] Computer 10 aligns the horizontal coordinates, orientation, and scale of the 3D BIM data with those of the horizontal 2D construction drawing based on attribute information (step S2). Computer 10 identifies the Z coordinate (ground height) of a predetermined measurement point in the 3D BIM data as the sum of the absolute height of the room where the measurement point is located, the height of the bottom edge of this room, and the floor height of the measurement point. The measurement point is, for example, an arbitrary position set in advance. Based on the attribute information and the identified Z coordinate (ground height) of the measurement point, Computer 10 converts the coordinates of the measurement point from paper coordinates in the horizontal 2D construction drawing to model coordinates in the 3D BIM data. Based on the converted model coordinates, Computer 10 identifies the position of the measurement point in the 3D BIM data and aligns the identified position with the horizontal coordinates, orientation, and scale of the horizontal 2D construction drawing.

[0019] Based on the alignment results, the computer 10 horizontally positions the horizontal 2D construction drawing at the aligned position in the 3D BIM model generated based on the 3D BIM data (step S3). The computer 10 horizontally positions the horizontal 2D construction drawing at the aligned position.

[0020] Computer 10 outputs a 3D BIM model (step S4). Computer 10 displays the 3D BIM model with the horizontal 2D construction drawings on the information terminal 3 and outputs the 3D BIM model.

[0021] The above is an overview of the BIM model horizontal construction drawing placement system 1. The BIM model horizontal construction drawing placement system 1 makes it possible to improve the efficiency of construction progress management.

[0022] [Device Configuration] Figure 2 is a block diagram showing the configuration of the BIM Model Horizontal Construction Drawing Placement System 1. Based on Figure 2, the device configuration of the BIM Model Horizontal Construction Drawing Placement System 1 will be described. The BIM Model Horizontal Construction Drawing Placement System 1 is a system for placing 2D construction drawings within a 3D BIM model, and consists of at least an information terminal 3 and a computer 10. The BIM Model Horizontal Construction Drawing Placement System 1 is a system in which the computer 10 is connected to the information terminal 3 via a network 8 such as a public telephone network, enabling data communication. In addition to the information terminal 3 and the computer 10, the BIM Model Horizontal Construction Drawing Placement System 1 may also include other terminals and devices such as external systems, and their number, types, and functions can be designed as appropriate.

[0023] Information terminal 3 is the terminal device used by the user as described above. Information terminal 3 includes a terminal control unit comprising a CPU (Central Processing Unit), GPU (Graphics Processing Unit), RAM (Random Access Memory), ROM (Read Only Memory), etc., and a communication unit comprising devices that enable communication with other terminals and devices. Furthermore, information terminal 3 includes an input / output unit comprising various devices that perform tasks such as receiving predetermined inputs and inputting and outputting various types of data.

[0024] Computer 10 has server functionality and may be implemented by a single computer, or by multiple computers, such as in a cloud computer. Computer 10 includes a CPU, GPU, RAM, ROM, etc. as a control unit, and a communication unit that includes a device for communicating with other terminals and devices, and an acquisition unit that acquires 3D BIM data, attribute information, and horizontal 2D construction drawings, which are horizontal 2D construction drawings, of the target building. Computer 10 also includes a processing unit that includes various devices for executing various processes, an alignment unit that aligns the horizontal coordinates, orientation, and scale of the 3D BIM data and the horizontal 2D construction drawings based on the attribute information, and a drawing placement unit that horizontally places the horizontal 2D construction drawings at the aligned positions in the 3D BIM model generated based on the 3D BIM data based on the alignment results.

[0025] In computer 10, the control unit loads a predetermined program and, in cooperation with the communication unit, realizes an acquisition module, output module, change acceptance module, progress acceptance module, and sharing module. Also in computer 10, the control unit loads a predetermined program and, in cooperation with the processing unit, realizes a generation module, alignment module, drawing placement module, grid line placement module, calculation module, elevation placement module, change module, rearrangement module, storage module, and icon placement module.

[0026] The following describes each process performed by the BIM model horizontal construction drawing placement system 1, along with the processes performed by each module described above. In this specification, each module may perform its processing as a function of its own, or it may perform it through a predetermined application.

[0027] [Drawing Placement Processing Executed by Computer 10] The drawing placement processing executed by computer 10 will be explained based on Figure 3. This figure is a flowchart of the drawing placement processing executed by computer 10. The drawing placement processing consists of an acquisition process (step S1) to acquire 3D BIM data, attribute information, and horizontal 2D construction drawings of the target building; an alignment process (step S2) to align the horizontal coordinates, orientation, and scale of the 3D BIM data and the horizontal 2D construction drawings based on the attribute information; a drawing placement process (step S3) to horizontally place the horizontal 2D construction drawings at the aligned positions in the 3D BIM model generated based on the 3D BIM data based on the alignment results; and an output process (step S4) to output the 3D BIM model.

[0028] The acquisition module acquires 3D BIM data, attribute information, and horizontal 2D construction drawings of the target building (step S10). The 3D BIM data is data that visualizes the 3D shape model of the target building. The attribute information is information about the target building, such as the specifications and performance of each part, and the names, uses, finishes, and cost information of rooms, etc. For example, attribute information about floors (floor information) is the name, height, Z coordinate (absolute height), etc., attribute information about rooms (room information) is the base floor, room name, height, area, volume, bottom edge height, etc., and attribute information about layouts (layout information) is, for example, the name, the width of the paper, the height of the paper, the horizontal coordinate of the paper, the vertical coordinate of the paper, page number, offset X, offset Y, scale, vector, grid line information, etc. The horizontal 2D construction drawings are 2D construction drawings of the target building in the horizontal direction (see Figure 4). The horizontal 2D construction drawings may be for each floor or for the entire building. The acquisition module acquires 3D BIM data, attribute information, and horizontal 2D construction drawings from an external system (not shown) or information terminal 3, etc. The acquisition module sends a transmission request for the 3D BIM data, attribute information, and horizontal 2D construction drawings to the external system or information terminal 3, etc. Based on this transmission request, the external system or information terminal 3 transmits the 3D BIM data, attribute information, and horizontal 2D construction drawings to computer 10. The acquisition module receives this 3D BIM data, attribute information, and horizontal 2D construction drawings and acquires the 3D BIM data, attribute information, and horizontal 2D construction drawings of the target building.

[0029] A horizontal two-dimensional construction drawing will be explained based on Figure 4. This figure schematically shows a horizontal two-dimensional construction drawing of a standard floor as an example of a horizontal two-dimensional construction drawing. In this figure, a horizontal two-dimensional construction drawing 20 is shown. The horizontal two-dimensional construction drawing 20 is a floor plan of the standard floor and describes the layout of the floor corresponding to the standard floor, the types of doors and windows, the positions of doors and windows, the types of walls, the positions of walls, the types of equipment, the positions of equipment, etc. In addition, the horizontal two-dimensional construction drawing 20 shows multiple grid lines 21.

[0030] Returning to Figure 3, let's continue explaining the drawing placement process. The generation module generates a 3D BIM model based on the 3D BIM data (step S11). The generation module performs modeling based on the acquired 3D BIM data and generates a 3D BIM model (see Figure 5).

[0031] Based on Figure 5, the 3D BIM model generated by the generation module will be explained. This figure schematically shows the 3D BIM model generated by the generation module. In this figure, the 3D BIM model 30 is shown. The 3D BIM model 30 is a 3D model based on the 3D BIM data of the target building generated on the computer 10. The 3D BIM model 30 is a collection of objects (walls, columns, fixtures, stairs, equipment, etc.), and each object contains various information such as dimensions (width, depth, height), material, performance, part number, manufacturer, price, and assembly process. The generation module generates each object based on the information corresponding to the acquired 3D BIM data and models the 3D BIM model.

[0032] Returning to Figure 3, the drawing placement process continues. The alignment module aligns the horizontal coordinates, orientation, and scale of the 3D BIM data with those of the horizontal 2D construction drawing based on attribute information (step S12). Alignment means aligning the position of the horizontal 2D construction drawing with the corresponding position in the 3D BIM model. The alignment module identifies the coordinates of the measurement points pre-set in the 3D BIM model and converts these coordinates into model coordinates, which are the coordinates of the 3D BIM model. The alignment module aligns the position corresponding to the converted model coordinates in the 3D BIM model with the horizontal coordinates, orientation, and scale of the horizontal 2D construction drawing (paper) in the attribute information. At this time, the alignment module may also align the vertical coordinates in addition to the horizontal coordinates of the horizontal 2D construction drawing. The alignment module identifies the Z coordinates (ground height) of the measurement points pre-set for each room, etc., in the 3D BIM model. The alignment module adds the absolute height of the room, the height of the bottom edge of the room, and the height of the measurement point above the floor to determine the Z coordinate of the measurement point. Based on the attribute information and the Z coordinate of the determined measurement point, the alignment module converts the coordinates of the measurement point from paper coordinates of a horizontal 2D construction drawing to model coordinates, which are the coordinates of a 3D BIM model. Paper coordinates are coordinates based on a predetermined origin, in units of mm, and are denoted as (X, Y). Model coordinates are coordinates in a 3D BIM model and are denoted as (x, y, z). The Z coordinate in the model coordinates is the Z coordinate of the determined measurement point. The alignment module converts the coordinates of the measurement point from paper coordinates to model coordinates using the following formula 1. In formula 1, X and Y are the X coordinate and Y coordinate in paper coordinates, respectively. In formula 1, x, y, and z are the X coordinate, Y coordinate, and Z coordinate in model coordinates, respectively. Furthermore, [0], [1], and [2] indicate that the X-axis in three-dimensional space points to the X-axis [0], Y-axis [1], and Z-axis [2] on the paper coordinate plane. Also, [3], [4], and [5] indicate that the Y-axis in three-dimensional space points to the X-axis [3], Y-axis [4], and Z-axis [5] on the paper coordinate plane.Furthermore, [6], [7], and [8] indicate that the Z-axis in three-dimensional space points to the X-axis [6], Y-axis [7], and Z-axis [8] in the paper coordinate plane. The orientation of the paper coordinates is such that X increases to the right from a given origin, Y increases upwards from a given origin, and Z increases towards the user viewing the paper from directly above. The alignment module substitutes the acquired attribute information into Equation 1 and converts the coordinates of the measurement points from paper coordinates to model coordinates. Here, z is the Z-coordinate of the specified measurement point.

[0033]

[0034] The alignment module identifies the position of the horizontal 2D construction drawing within the 3D BIM model based on the model coordinates of the converted measurement points, and aligns the horizontal coordinates, orientation, and scale of the 3D BIM data with those of the horizontal 2D construction drawing. At this time, the alignment module identifies and aligns the orientation and scale of the horizontal 2D construction drawing based on attribute information. The alignment module may also use vertical coordinates in addition to horizontal coordinates for alignment. In this case, using both horizontal and vertical coordinates makes it easier to match the target 3D BIM model with the vertical 2D construction drawing, further improving the efficiency of construction progress management.

[0035] The alignment performed by the alignment module will be explained based on Figures 6 and 7. Figure 6 is a schematic diagram showing the method for determining the Z coordinate (ground height) of a measurement point, and Figure 7 is a schematic diagram showing the method for converting the coordinates of a measurement point from paper coordinates to model coordinates. Figure 6 shows the method for determining the ground height of a measurement point set in the office on the second floor, and Figure 7 shows the method for converting the coordinates of this measurement point from paper coordinates to model coordinates.

[0036] In Figure 6, the alignment module identifies the Z coordinate (ground height) of measurement point 40. The alignment module identifies the absolute height of the second floor 41 based on floor information. The alignment module identifies the bottom height of the office 42 based on room information. The alignment module identifies the height of measurement point 40 within the office 42 (floor height) based on layout information, from the bottom height of the second floor 41. The alignment module adds up the absolute height of the second floor 41, the bottom height of the office 42, and the height of measurement point 40 within the office 42 (floor height) to identify the Z coordinate (ground height) of measurement point 40. Using the identified Z coordinate of measurement point 40, the alignment module converts the coordinates of measurement point 40 from paper coordinates to model coordinates.

[0037] In Figure 7, the alignment module converts the coordinates of measurement point 50 (corresponding to measurement point 40 in Figure 6) from paper coordinates to model coordinates. In the same figure, the solid line frame 51 represents the paper (horizontal 2D construction drawing), and the dashed line frame 52 represents the view (the corresponding surface of the 3D BIM model). The alignment module converts the model coordinates using the largest view among the frame 52. Paper coordinates are the coordinates from the bottom left of frame 51, in units of mm, and are shown as (X, Y). Model coordinates are the coordinates of the 3D BIM model and are shown as (x, y). The alignment module converts the coordinates of measurement point 50 from paper coordinates to model coordinates using the above formula 1. Based on the converted model coordinates, the alignment module identifies the position of measurement point 50 within the 3D BIM model and aligns the horizontal coordinates, orientation, and scale of the 3D BIM data with those of the horizontal 2D construction drawing. At this time, the alignment module identifies the orientation and scale of the horizontal two-dimensional construction drawing based on attribute information and aligns it accordingly.

[0038] Returning to Figure 3, let's continue explaining the drawing placement process. Based on the alignment results, the drawing placement module places the horizontal 2D construction drawing horizontally at the aligned position in the 3D BIM model (step S13). The drawing placement module places the horizontal 2D construction drawing based on the aligned position, orientation, and scale in the 3D BIM model. Furthermore, default values ​​for the vertical coordinates to be placed may be set in advance. In this case, the horizontal 2D construction drawing may be placed horizontally at the position of the default vertical coordinates and at the position of the horizontal coordinates aligned by the alignment module. For example, if the default vertical coordinate is set to the position of the second floor of the building, the horizontal 2D construction drawing will be placed horizontally on top of the second floor of the building. Of course, the default values ​​can be freely changed, and the horizontal and vertical positions can also be freely changed after placement using the default values.

[0039] The grid line placement module places grid lines (step S14). Based on the placed horizontal 2D construction drawings, the grid line placement module places the grid lines at the corresponding locations in the 3D BIM model. The grid line placement module may place corresponding grid lines for each floor, or it may place corresponding grid lines only for a predetermined floor.

[0040] Based on Figure 8, a 3D BIM model with horizontal 2D construction drawings and grid lines in place will be described. This figure schematically shows a 3D BIM model with horizontal 2D construction drawings and grid lines in place. In this figure, a 3D BIM model 60 is shown. In the 3D BIM model 60, horizontal 2D construction drawings 61 and grid lines 62 are placed. The horizontal 2D construction drawings 61 are placed at positions based on the alignment performed by the process in step S12. The grid lines 62 are placed at positions based on attribute information or positions indicated in the placed horizontal 2D construction drawings 61. The horizontal 2D construction drawings 61 may or may not have transparency processing applied.

[0041] Returning to FIG. 3, the continuation of the drawing layout process will be described. The output module outputs a 3D BIM model (step S15). The output module transmits the horizontal two-dimensional construction drawing and the 3D BIM model with the center line of the road to the information terminal 3. The information terminal 3 receives this 3D BIM model and displays it on its display unit via a predetermined UI (User Interface) or the like. The output module outputs the 3D BIM model by causing the information terminal 3 to display the 3D BIM model.

[0042] The above is the drawing layout process.

[0043] [Advanced Layout Process Executed by Computer 10] Based on FIG. 9, the advanced layout process executed by the computer 10 will be described. This figure is a diagram showing a flowchart of the advanced layout process executed by the computer 10.

[0044] The calculation module calculates the ground elevation of the horizontal two-dimensional construction drawing (step S20). The calculation module calculates the ground elevation of the horizontal two-dimensional construction drawing arranged in the 3D BIM model. The calculation module may calculate the ground elevation based on the height from the ground to the actually arranged horizontal two-dimensional construction drawing, or may calculate the ground elevation based on the ground elevation when the horizontal two-dimensional construction drawings are aligned.

[0045] The calculation module calculates the floor corresponding to the ground elevation (step S21). The calculation module calculates which floor of the target building the calculated ground elevation corresponds to. The calculation module calculates the floor corresponding to the ground elevation based on the ground elevation and the preset height for each floor, etc.

[0046] The advanced layout module arranges the ground elevation and the floor in the 3D BIM model (step S22). The advanced layout module superimposes and arranges the calculated ground elevation and floor on the horizontal two-dimensional construction drawing or arranges them near the horizontal two-dimensional construction drawing.

[0047] The output module outputs a 3D BIM model (step S23). The output module executes the same process as the process in step S15 on the 3D BIM model in which the ground height and floors are arranged, and outputs it.

[0048] The above is the altitude arrangement process. When the computer 10 executes the altitude arrangement process, it may be executed at an arbitrary timing after the execution of the process in step S13. For example, when the computer 10 executes the altitude arrangement process at a stage from after the execution of the process in step S13 to before the execution of the process in step S15, in the process of step S15, it may output a 3D BIM model in which the horizontal two-dimensional construction drawing and the street center line, the ground height and the floors are arranged.

[0049] [Altitude change process executed by computer 10] The altitude change process executed by the computer 10 will be described based on FIG. 10. This figure is a diagram showing a flowchart of the altitude change process executed by the computer 10.

[0050] The change reception module receives a change in the ground height (step S30). The information terminal 3 receives an input for changing the ground height of the horizontal two-dimensional construction drawing arranged in the displayed 3D BIM model. The information terminal 3 may receive an input (such as a swipe) for moving the horizontal two-dimensional construction drawing in the vertical direction, or may receive an input of a numerical value of the ground height (such as a change input of the numerical value of the vertical coordinate). The information terminal 3 transmits the received input content to the computer 10. The change reception module receives this input content and receives a change in the ground height.

[0051] The change module changes the ground height (step S31). The change module changes the vertical position of the horizontal two-dimensional construction drawing arranged in the 3D BIM model based on the received input content, and changes the ground height. The change module changes the vertical coordinate of the horizontal two-dimensional construction drawing to the vertical coordinate corresponding to the received change.

[0052] The repositioning module repositions the horizontal 2D construction drawings based on the changed ground clearance (step S32). When repositioning the horizontal 2D construction drawings, the repositioning module may move (slide, etc.) the placed horizontal 2D construction drawings to a position based on the changed ground clearance (repositioning while maintaining the placed state), or it may delete the placed horizontal 2D construction drawings and then reposition them to a position based on the changed ground clearance (repositioning without maintaining the placed state).

[0053] The output module outputs a 3D BIM model (step S33). The output module outputs a 3D BIM model in which the horizontal 2D construction drawings with changed ground height have been rearranged, by performing the same processing as in step S15.

[0054] The above describes the altitude change process. Furthermore, if the change in ground height results in a change in the number of floors (e.g., exceeding or falling short of the pre-set ground height for each floor), the computer 10 may also change the floor accordingly. The computer 10 may also perform the altitude placement process again for the changed ground height and floors.

[0055] [Icon placement process executed by computer 10] The icon placement process executed by computer 10 will be explained based on Figure 11. The same figure is a flowchart of the icon placement process executed by computer 10.

[0056] The progress reception module receives inspection progress (step S40). Inspection progress refers to the progress of inspections for inspection items related to the construction of a building. The information terminal 3 receives input (text input, etc.) of inspection progress for each location corresponding to a pre-set inspection item in the horizontal 2D construction drawing placed within the displayed 3D BIM model. The information terminal 3 transmits the received input content (location in the horizontal 2D construction drawing and inspection progress) to the computer 10. The progress reception module receives this input content and accepts the inspection progress.

[0057] The storage module stores the inspection progress in an icon (step S41). The icon may be, for example, a symbol, mark, number, or letter. The icons may be categorized by inspection item, or they may be arbitrarily set by the user. The storage module may either add the inspection progress to the icon data or associate it with the icon.

[0058] The icon placement module places icons on the horizontal two-dimensional construction drawing (step S42). The icon placement module places each icon containing the inspection progress at a location in the horizontal two-dimensional construction drawing that corresponds to the location of the inspection progress in the received input content, which is located within the three-dimensional BIM model. The icon placement module either places the icons superimposed on this location or in the vicinity of this location.

[0059] The output module outputs a 3D BIM model (step S43). The output module outputs the 3D BIM model with icons placed on it, performing the same processing as in step S15.

[0060] The above describes the icon placement process. When the information terminal 3 receives input (such as a tap) from the user regarding an icon placed within the displayed 3D BIM model, it displays the inspection progress stored in that icon by superimposing it on the icon or displaying it in the vicinity of the icon.

[0061] The drawing placement module can also be configured to place a horizontal 2D construction drawing with icons already placed into the 3D BIM model through the process in step S13, using icon placement processing. In this case, the horizontal 2D construction drawing, with the icons still placed, is placed at the aligned position in the 3D BIM model while retaining the already placed icons. Furthermore, the computer 10 can also be configured to perform icon placement processing on the horizontal 2D construction drawing placed in the 3D BIM model while retaining the icons.

[0062] Computer 10 can also be configured to share inspection progress with other users. In this case, computer 10 shares a 3D BIM model containing a horizontal 2D construction drawing with icons indicating the inspection progress with an information terminal 3 used by other users. The information terminal 3 receives input from the user regarding the sharing of inspection progress (such as tapping on the sharing icon) via a predetermined UI for the 3D BIM model containing the horizontal 2D construction drawing with icons indicating the inspection progress. The information terminal 3 transmits the received input regarding the sharing of inspection progress to computer 10. Computer 10 receives this input. Based on this input, the sharing module transmits the 3D BIM model containing the horizontal 2D construction drawing with icons indicating the inspection progress to an information terminal 3 used by another user that has been set in advance, or to an information terminal 3 used by a user whose identifier matches the identifier of the other user included in the input. The information terminal 3 used by other users receives the 3D BIM model on which the horizontal 2D construction drawing with icons containing the inspection progress is placed, and displays it on its own display unit via a predetermined UI. The sharing module shares the inspection progress with other users by displaying the 3D BIM model on the information terminal 3 used by other users, which contains the horizontal 2D construction drawing with icons containing the inspection progress. It then performs tasks such as storing and outputting the converted reading results, and outputs the reading results in a predetermined data format.

[0063] The means and functions described above are realized by a computer (including the CPU, information processing unit, and various terminals) reading and executing a predetermined program. The program may be provided, for example, via a network from the computer (SaaS: Software as a Service) or as a cloud service. Alternatively, the program may be provided in a form recorded on a computer-readable recording medium. In this case, the computer reads the program from the recording medium, transfers it to an internal or external recording device, records it, and executes it. Alternatively, the program may be pre-recorded on a recording device (recording medium) and provided to the computer from that recording device via a communication line.

[0064] Although embodiments of the present invention have been described above, the present invention is not limited to the embodiments described above. Furthermore, the effects described in the embodiments of the present invention are merely a list of the most preferred effects arising from the present invention, and the effects of the present invention are not limited to those described in the embodiments of the present invention.

[0065] A first aspect disclosed in this embodiment provides a BIM model horizontal construction drawing placement system for placing a two-dimensional construction drawing within a three-dimensional BIM model, comprising: an acquisition unit that acquires three-dimensional BIM data, attribute information, and a horizontal two-dimensional construction drawing which is a two-dimensional construction drawing in the horizontal direction of a target building; an alignment unit that aligns the horizontal coordinates, orientation, and scale of the three-dimensional BIM data and the horizontal two-dimensional construction drawing based on the attribute information; and a drawing placement unit that horizontally places the horizontal two-dimensional construction drawing at the aligned position within the three-dimensional BIM model generated based on the three-dimensional BIM data, based on the result of the alignment.

[0066] A second aspect disclosed in this embodiment provides a horizontal construction drawing placement system within a BIM model according to the first aspect, further comprising a grid line placement section for arranging grid lines within the three-dimensional BIM model.

[0067] A third aspect disclosed in this embodiment provides a BIM model in-horizontal construction drawing placement system according to the first aspect, further comprising a calculation unit for calculating the ground height of the horizontal two-dimensional construction drawing.

[0068] A fourth aspect disclosed in this embodiment provides a horizontal construction drawing placement system within a BIM model according to the third aspect, wherein the calculation unit calculates the floor level corresponding to the ground height.

[0069] A fifth aspect disclosed in this embodiment provides a BIM model in-horizontal construction drawing placement system according to the first aspect, further comprising a modification unit for changing the ground height of the horizontal two-dimensional construction drawing.

[0070] A sixth aspect disclosed in this embodiment provides a BIM model horizontal construction drawing placement system according to the first aspect, further comprising an icon placement unit for placing icons on the horizontal two-dimensional construction drawing.

[0071] A seventh aspect disclosed in this embodiment provides a BIM model horizontal construction drawing placement system according to the sixth aspect, further comprising a storage unit for storing inspection progress in the icon.

[0072] An eighth aspect disclosed in this embodiment provides a BIM model horizontal construction drawing placement system according to the seventh aspect, further comprising a shared section for sharing the inspection progress.

[0073] A ninth aspect disclosed in this embodiment provides a BIM model horizontal construction drawing placement system according to the sixth aspect, wherein the drawing placement unit horizontally places the horizontal two-dimensional construction drawing while retaining the icons placed on the horizontal two-dimensional construction drawing.

[0074] A tenth aspect disclosed in this embodiment provides a horizontal construction drawing placement system within a BIM model according to the first aspect, wherein the alignment unit further aligns vertical coordinates.

[0075] 1. Horizontal construction drawing placement system within the BIM model 3. Information terminal 8. Network 10. Computer 20. Horizontal 2D construction drawing 21. Grid lines 30. 3D BIM model 40. Measurement points 41. Second floor 42. Office 50. Measurement points 51. Border lines 52. Border lines 60. 3D BIM model 61. Horizontal 2D construction drawing 62. Grid lines

Claims

1. A BIM model horizontal construction drawing placement system for placing two-dimensional construction drawings within a three-dimensional BIM model, comprising: an acquisition unit that acquires three-dimensional BIM data, attribute information, and horizontal two-dimensional construction drawings, which are two-dimensional construction drawings in the horizontal direction, of a target building; an alignment unit that aligns the horizontal coordinates, orientation, and scale of the three-dimensional BIM data and the horizontal two-dimensional construction drawings based on the attribute information; and a drawing placement unit that horizontally places the horizontal two-dimensional construction drawings at the aligned positions within the three-dimensional BIM model generated based on the three-dimensional BIM data, based on the alignment results.

2. The BIM model horizontal construction drawing placement system according to claim 1, further comprising a grid line placement section for placing grid lines within the three-dimensional BIM model.

3. The BIM model in-horizontal construction drawing placement system according to claim 1, further comprising a calculation unit for calculating the ground height of the horizontal two-dimensional construction drawing.

4. The calculation unit calculates the floor level corresponding to the ground height, the BIM model horizontal construction drawing placement system according to claim 3.

5. A BIM model in-horizontal construction drawing placement system according to claim 1, further comprising a modification unit for changing the ground height of the horizontal two-dimensional construction drawing.

6. The BIM model horizontal construction drawing placement system according to claim 1, further comprising an icon placement unit for placing icons on the horizontal two-dimensional construction drawing.

7. The BIM model horizontal construction drawing placement system according to claim 6, further comprising a storage unit for storing inspection progress for the icon.

8. The BIM model horizontal construction drawing placement system according to claim 7, further comprising a shared section for sharing the inspection progress.

9. The BIM model horizontal construction drawing placement system according to claim 6, wherein the drawing placement unit, when icons are placed on the horizontal two-dimensional construction drawing, places the horizontal two-dimensional construction drawing horizontally while retaining the icons.

10. The BIM model horizontal construction drawing placement system according to claim 1, wherein the alignment unit further aligns the vertical coordinates.

11. A method for placing horizontal construction drawings within a BIM model, which is performed by a computer for placing two-dimensional construction drawings within a three-dimensional BIM model, comprising: a step of acquiring three-dimensional BIM data, attribute information, and a horizontal two-dimensional construction drawing which is a two-dimensional construction drawing in the horizontal direction of a target building; a step of aligning the horizontal coordinates, orientation, and scale of the three-dimensional BIM data and the horizontal two-dimensional construction drawing based on the attribute information; and a step of horizontally placing the horizontal two-dimensional construction drawing at the aligned position within the three-dimensional BIM model generated based on the three-dimensional BIM data, based on the result of the alignment.

12. A computer-readable program for causing a computer to place a two-dimensional construction drawing within a three-dimensional BIM model to perform the following steps: acquiring three-dimensional BIM data, attribute information, and a horizontal two-dimensional construction drawing of a target building; aligning the horizontal coordinates, orientation, and scale of the three-dimensional BIM data and the horizontal two-dimensional construction drawing based on the attribute information; and horizontally placing the horizontal two-dimensional construction drawing at the aligned position within the three-dimensional BIM model generated based on the three-dimensional BIM data, based on the alignment result.

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