Design support system and design support program

Abstract

To provide a design support system and a design support program configured to allow information to be standardized between a construction site and BIM.SOLUTION: A design support system includes: a coordinate data acquisition unit (operation input unit 12 and arithmetic operation unit 13) which can acquire coordinate data in a plurality of different coordinate systems, the coordinate data indicating a reference point in each process of a construction site of an architectural structure; a coordinate data conversion unit (arithmetic unit 13) which converts, when the coordinate data acquisition unit acquires coordinate data indicating on reference point, the acquired coordinate data into coordinate data in a coordinate system which is different from a coordinate system used for the one reference point; a model arrangement unit (arithmetic unit 13) which arranges a reference point model on a BIM model of the architectural structure on the basis of the coordinate data in the coordinate system before conversion and the coordinate data in the coordinate system after conversion; and a display unit 14 which can display, as coordinate data representing the reference point model, the coordinate data in the coordinate system before conversion and the coordinate data in the coordinate system after conversion.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a technology for a design support system and a design support program for supporting the design of a building. [Background technology]

[0002] BACKGROUND ART Conventionally, a design support system that uses Building Information Modeling (BIM) is known as a design support system for supporting the design of a building (see, for example, Patent Document 1).

[0003] Specifically, in the design of a building, creating a BIM model allows designers, planners, construction supervisors, construction contractors, and others to share information about the building. A BIM model is a three-dimensional model that contains information (specification information) about the shape, placement, materials, and other aspects of the building's components. Using this BIM model, it is possible to create three-dimensional drawings of the three-dimensional model viewed from various angles, as well as cut the three-dimensional drawings in various ways and create two-dimensional drawings viewed from various angles. A BIM model of a building is constructed as a collection of components (objects), such as building materials, parts, and equipment, that make up the building. These components contain various specification information, which can be changed, modified, and added to, and a history of changes and additions can also be kept.

[0004] However, with conventional BIM, data measured on-site (at the construction site of a building) was sometimes not reflected on the BIM, and it could not be said that information was sufficiently shared between the site and BIM. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Laid-Open No. 2013-164681 Summary of the Invention [Problem to be solved by the invention]

[0006] The present invention was made in consideration of the above situation, and the problem it aims to solve is to provide a design support system and a design support program that can share information between the site and BIM. [Means for solving the problem]

[0007] The problem to be solved by the present invention is as described above, and the means for solving this problem will now be described.

[0008] That is, in claim 1, the system comprises: a coordinate data acquisition unit capable of acquiring coordinate data in a plurality of different coordinate systems, the coordinate data indicating a reference point at each stage of a construction site of a building; a coordinate data conversion unit that, when the coordinate data acquisition unit acquires coordinate data indicating a reference point, converts the acquired coordinate data into coordinate data in a coordinate system different from the coordinate system used for the reference point among the plurality of coordinate systems that can be acquired by the coordinate data acquisition unit; a model placement unit that places a reference point model, which is a BIM model of the reference point, on a BIM model of the building based on coordinate data indicating the reference point in the coordinate system before conversion by the coordinate data conversion unit or coordinate data in the coordinate system after conversion by the coordinate data conversion unit; and a display unit that is capable of displaying the reference point model and is capable of displaying, as coordinate data indicating the reference point model, coordinate data in the coordinate system before conversion by the coordinate data conversion unit and coordinate data in the coordinate system after conversion by the coordinate data conversion unit, regarding the one reference point.

[0009] In claim 2, the coordinate system used for the coordinate data indicating the one reference point includes at least one of a coordinate system using the origin of a plane rectangular coordinate system or a coordinate system using a predetermined reference point as its origin, and the other coordinate system different from the coordinate system used for the one reference point includes at least the other of a coordinate system using the origin of a plane rectangular coordinate system or a coordinate system using a predetermined reference point as its origin.

[0010] In claim 3, a coordinate system selection unit is provided that can select a coordinate system to be used for the coordinate data indicating the one reference point from a plurality of coordinate systems, and when the coordinate system selection unit selects a coordinate system to be used for the coordinate data indicating the one reference point, the coordinate data conversion unit automatically converts the coordinate data in the coordinate system indicating the one reference point into coordinate data using the other coordinate system.

[0011] In claim 4, the model placement unit automatically places the reference point model on the BIM model of the building when the coordinate system selection unit selects a coordinate system to be used for the coordinate data indicating the one reference point.

[0012] In claim 5, the display unit displays the one reference point model in response to the reference point model being selected on the display screen of the display unit. Coordinate data Coordinate data in the coordinate system before conversion by the conversion unit, and Coordinate data It displays the coordinate data in the coordinate system after conversion by the conversion unit.

[0013] In claim 6, the computer is caused to execute the following steps: a coordinate data acquisition step for acquiring coordinate data in a plurality of different coordinate systems, the coordinate data indicating a reference point at each stage of a construction site of a building; a coordinate data conversion step for converting, when coordinate data indicating a reference point is acquired in the coordinate data acquisition step, the acquired coordinate data into coordinate data in a coordinate system different from the coordinate system used for the reference point among a plurality of coordinate systems that can be acquired in the coordinate data acquisition step; a model placement step for placing a reference point model, which is a BIM model of the reference point, on a BIM model of the building based on coordinate data in the coordinate system before conversion by the coordinate data conversion step indicating the reference point, or coordinate data in the coordinate system after conversion by the coordinate data conversion step; and a display step for displaying the reference point model and displaying, as coordinate data indicating the reference point model, the coordinate data in the coordinate system before conversion by the coordinate data conversion step and the coordinate data in the coordinate system after conversion by the coordinate data conversion step, with respect to the one reference point. [Effects of the Invention]

[0014] The present invention has the following effects.

[0015] In claim 1, information can be shared between the site and BIM.

[0016] In claim 2, coordinate values ​​of coordinate systems with different origins can be reflected in BIM.

[0017] In claim 3, the time and effort required for converting coordinates can be reduced.

[0018] According to claim 4, the effort required for arranging the reference point model can be reduced.

[0019] Claim 5 makes it easier to design.

[0020] In claim 6, information can be shared between the site and BIM. [Brief explanation of the drawings]

[0021] [Figure 1] 1 is a block diagram showing the configuration of a design support system according to an embodiment of the present invention; [Figure 2] FIG. 2 is a block diagram showing the configuration of a user terminal. [Figure 3] 10 is a flowchart showing the steps of measuring the position of a reference point at a site. [Figure 4] (a) A schematic plan view showing the location of boundary points and benchmarks during the current survey. (b) A schematic plan view showing the location of reference marks on the road. (c) A schematic plan view showing the location of relief marks on the dirt floor. [Figure 5] A flowchart showing how to import control points into BIM. [Figure 6] 6 is a flowchart continuing from FIG. 5, showing a case where the coordinate system of the input reference point is a public coordinate system. [Figure 7] 6 is a flowchart continuing from FIG. 5 and showing a case where the coordinate system of the input reference point is the benchmark coordinate system. [Figure 8] 6 is a flowchart continuing from FIG. 5 and showing a case where the coordinate system of the input reference point is the project coordinate system. [Figure 9] A diagram showing the X and Y coordinates of the benchmark's public coordinate system, and the X and Y coordinates of the boundary points in the public coordinate system and the benchmark coordinate system. [Figure 10] A diagram showing the X and Y coordinates of the benchmark's public coordinate system, and the X and Y coordinates of the public coordinate system and benchmark coordinate system of the intersection of the reference marks. [Figure 11] A diagram showing a display screen in which the coordinate values ​​of the public coordinate system, the coordinate values ​​of the benchmark coordinate system, and the coordinate values ​​of the project coordinate system of the reference point model are displayed. DETAILED DESCRIPTION OF THE INVENTION

[0022] The configuration of a design support system 1 according to one embodiment of the present invention will be described below with reference to FIG.

[0023] The design support system 1 is a system for supporting the design of a building by using a BIM model. The design support system 1 mainly includes a user terminal 10 and a shared server 20.

[0024] The user terminal 10 is a terminal used by a user (designer) when designing a building. A personal computer or the like can be used as the user terminal 10. The user terminal 10 can design a building by combining BIM models for each component of the building to create a BIM model for the entire building. Multiple user terminals 10 (three in FIG. 1) are provided. Details of the user terminals 10 will be described later.

[0025] The shared server 20 is connected to each user terminal 10 via a network N. The network N includes a public network such as the Internet, a wireless network such as a mobile phone network, a LAN (Local Area Network), etc. The shared server 20 stores a BIM model.

[0026] Access to the shared server 20 requires access authority, and only user terminals 10 that have been granted access authority can access the shared server 20 and share various data stored in the shared server 20. For example, at each design stage, a BIM model is stored in the shared server 20, and user terminals 10 that have been granted access authority can access the shared server 20 to import the BIM model stored in the shared server 20 into their own user terminal 10, or upload a BIM model created on their own user terminal 10 to the shared server 20.

[0027] The configuration of the user terminal 10 will be described below with reference to Fig. 2. The user terminal 10 includes a communication unit 11, an operation input unit 12, a calculation unit 13, and a display unit 14.

[0028] The communication unit 11 is a part that communicates with the shared server 20. The communication unit 11 can transmit a BIM model created on the user terminal 10 to the shared server 20, and can receive a BIM model stored on the shared server 20.

[0029] The operation input unit 12 is a part where various information is input by user operation. A keyboard, a mouse, or the like is used as the operation input unit 12. The user can use the operation input unit 12 to create a BIM model, that is, to design a building using a BIM model. In addition, the user can input, for example, coordinate values ​​of survey points measured on-site into the operation input unit 12.

[0030] The calculation unit 13 is a part that performs various calculations. The calculation unit 13 can convert the coordinate system of the survey points input by the operation input unit 12. In addition, the calculation unit 13 can activate application software for BIM model design, thereby putting the user terminal 10 into a state where a BIM model can be created.

[0031] The calculation unit 13 has a storage unit that stores various data. The storage unit stores BIM models received by the communication unit 11 and BIM models created by the user terminal 10. The BIM models are stored with various information about the components that make up the building (component names, sizes (width, depth, height), coordinate values, materials, manufacturers, prices, etc.) linked to them. The storage unit also stores information input by the operation input unit 12 (for example, coordinate values ​​of survey points). The storage unit stores programs for various processes. The calculation unit 13 reads out the programs and executes various processes, which will be described later.

[0032] The display unit 14 displays images. The display unit 14 can display a BIM model. The display unit 14 can also display various information linked to the BIM model. A display device such as a liquid crystal display is used as the display unit 14.

[0033] In the design support system 1 configured in this manner, the BIM models created on each user terminal 10 are stored on the shared server 20, allowing information about buildings to be shared among designers, engineers, construction supervisors, construction contractors, and others.

[0034] Here, at a building construction site, a reference point is set for each process, and the position (coordinate value) of this reference point is measured, and then construction and measurement are carried out using this reference point as a reference. The coordinate values ​​of the reference point are measured as the X, Y, and Z coordinate values ​​of the reference point. Below, we will explain the process of measuring the position of the reference point that is carried out at the site using Figures 3 and 4.

[0035] First, in step S1 shown in Figure 3, the positions of the benchmark (BM) a1 and boundary point a2 (see Figure 4(a)) are measured during the current status survey. In this process, the surveyor determines the location of the benchmark a1 and the boundary point a2 of the site where the building is planned to be constructed. The benchmark a1 serves as a reference point for the building's height and planar position, and is primarily an immovable object such as an existing structure (such as a utility pole, fence, or roadside gutter), manhole, stake, or newly installed wooden stake. The coordinate values ​​of the benchmark a1 and boundary point a2 can be measured using surveying equipment such as an optical surveying device.

[0036] The positions of the benchmark a1 and boundary point a2 are expressed using coordinate values ​​in the public coordinate system. Here, the "public coordinate system" is a coordinate system that uses the origin of a plane rectangular coordinate system (public reference point) as its origin and the true north direction as its Y axis. The origin of the public coordinate system is set for each of the 19 regions into which Japan is divided.

[0037] After measuring the coordinate values ​​of the benchmark a1 and the boundary point a2 in step S1, a reference marking a3 (see FIG. 4(b)) is drawn on the road (site) based on the benchmark a1 and the boundary point a2 (reference marking is performed). Specifically, in the reference marking, a reference marking a3x extending in the X-axis direction and a reference marking a3y extending in the Y-axis direction are drawn as the reference marking a3. The reference marking is performed using a horizontal laser or the like to clearly indicate the height and position of the building specified in the design drawings.

[0038] Next, in step S2, the position of the intersection of the reference mark a3 on the road (the intersection of the reference mark a3x extending in the X-axis direction and the reference mark a3y extending in the Y-axis direction) is measured. The position of the intersection of the reference mark a3 is expressed in coordinate values ​​in a benchmark coordinate system. Here, the "benchmark coordinate system" is a coordinate system with the benchmark a1 determined in step S1 as its origin and the true north direction as its Y-axis. The coordinate values ​​of the intersection of the reference mark a3 can be measured using surveying equipment such as an optical surveying instrument.

[0039] In step S2, after measuring the coordinate values ​​of the intersection of the reference mark a3, the concrete floor etc. is poured based on this reference mark a3. Then, the contractor uses a horizontal laser or the like to draw relief marks a4 (see Figure 4(c)) at a position a certain distance away from the reference mark a3 so that they extend in the X-axis direction and the Y-axis direction (relief marks are drawn).

[0040] Next, in step S3, the position of the relief mark a4 on the dirt floor is measured. The position of the relief mark a4 is expressed as coordinate values ​​in the project coordinate system. Here, the "project coordinate system" is a coordinate system with the building reference point a5, which is the intersection of the reference mark a3x extending in the X-axis direction and the reference mark a3y extending in the Y-axis direction, as its origin, and the reference mark a3y as the Y-axis. In this embodiment, the intersection of the southernmost reference mark a3x of the reference marks a3x extending in the X-axis direction and the westernmost reference mark a3 of the reference marks a3y extending in the Y-axis direction is defined as the building reference point a5. The coordinate values ​​of the building reference point a5 can be measured using surveying equipment such as an optical surveying instrument.

[0041] As described above, in the measurement process carried out on site, the positions of the reference points (benchmark a1, boundary point a2, reference mark a3, relief mark a4, building reference point a5) are indicated for each process in three coordinate systems: the public coordinate system, the benchmark coordinate system, and the project coordinate system.

[0042] However, in the past, the information on control points that had been measured on-site was not reflected on BIM, and it could not be said that information was sufficiently shared between the site and BIM.

[0043] As mentioned above, various coordinate system reference points are set up at the site as the work progresses, and construction and measurements are carried out using each reference point for each work process. The coordinate values ​​in the public coordinate system used during current status surveys are calculated by converting the spherical Earth surface into a plane and applying corrections. Therefore, simply aligning the origins of the public coordinate system with those of the benchmark coordinate system and the project coordinate system results in discrepancies in the coordinate values. Because different coordinate systems are used for each work process, it has been difficult to compare measurement data obtained during different work processes.

[0044] Therefore, in the design support system 1 according to this embodiment, the reference points are incorporated into BIM by having each reference point have coordinate values ​​other than the coordinate system of the coordinate values ​​of that reference point so that the three coordinate systems of each reference point measured on site complement each other.

[0045] The method for importing reference points into BIM will be explained below using the flowcharts in Figures 5 to 8. When importing reference points into BIM, the BIM model of the target building is imported from the shared server 20 to the user's own user terminal 10 and displayed on the display unit 14.

[0046] In step S11, the user inputs the coordinate data of the reference points measured on-site. Here, "reference point coordinate data" refers to the coordinate values ​​of the reference points of each process (benchmark a1, boundary point a2, reference mark a3, relief mark a4, building reference point a5), and is the coordinate value of any of the public coordinate system, benchmark coordinate system, or project coordinate system. In this step, once the coordinate value of one of the reference points of each process is input, the next step S12 is carried out.

[0047] In step S12, the reference point coordinate data input to the operation input unit 12 is stored in the storage unit of the calculation unit 13 as CSV data.

[0048] Next, in step S13, a coordinate system for the CSV data (coordinate values ​​of the reference points input to the operation input unit 12) is selected. In this step, the user uses the operation input unit 12 to select the coordinate system for the input CSV data, i.e., the coordinate system in which the coordinate values ​​of the reference points are expressed, from among the public coordinate system, the benchmark coordinate system, and the project coordinate system. This selection is made, for example, on a selection screen displayed on the display unit 14.

[0049] Next, in step S14, it is determined whether the coordinate system of the CSV data is a public coordinate system. This determination is made by the calculation unit 13. If it is determined that the coordinate system of the CSV data is a public coordinate system ("YES" in step S14), the process proceeds to step S21 shown in FIG. 6.

[0050] In step S21, the coordinate values ​​of the benchmark coordinate system of the CSV data are calculated. This calculation is performed by the calculation unit 13. That is, in this step, the calculation unit 13 converts the coordinate values ​​of the CSV data from the coordinate values ​​of the public coordinate system to the coordinate values ​​of the benchmark coordinate system. The method of this conversion will be described below.

[0051] In Figure 9, x1, y1 indicate the coordinate values ​​(X coordinate value, Y coordinate value) of the benchmark a1 in the public coordinate system, and x2, y2 indicate the coordinate values ​​of the boundary point a2 in the public coordinate system (see Figure 4(a)). When converting the coordinate values ​​of the boundary point a2 from the coordinate values ​​x2, y2 in the public coordinate system to the coordinate values ​​x, y in the benchmark coordinate system, first, the distance S between the coordinate values ​​x1, y1 in the public coordinate system of the benchmark a1 and the coordinate values ​​x, y in the benchmark coordinate system of the boundary point a2 is calculated using the following equation 1.

[0052] S=√{(x2-x1) 2 +(y2-y1) 2} / αβ (Number 1) In the above equation (1), {(x2-x1) 2 +(y2-y1) 2} is contained within √, where α is the scale factor and β is the projection correction.

[0053] Then, the direction angle T (angle with respect to the Y axis) from the benchmark a1 to the boundary point a2 is calculated using the following equation 2.

[0054] T=tan -1 (y2-y1 / x2-x1) (Number 2)

[0055] Then, the coordinate values ​​x and y of the boundary point a2 in the benchmark coordinate system can be calculated using the following equations 3 and 4.

[0056] x=SsinT (Equation 3) y=ScosT (Equation 4)

[0057] Furthermore, the coordinate value z (Z coordinate value) of the boundary point a2 in the benchmark coordinate system can be calculated using the following equation 5.

[0058] z = z2 - z1 (Number 5) Here, z1 indicates the Z coordinate value of the benchmark a1 in the public coordinate system, and z2 indicates the Z coordinate value of the boundary point a2 in the public coordinate system.

[0059] In this way, the coordinate values ​​of the reference points can be converted from the coordinate values ​​of the public coordinate system to the coordinate values ​​of the benchmark coordinate system.

[0060] Next, in step S22, a reference point model (BIM model of the reference point) is placed at the coordinate value position of the benchmark coordinate system in the BIM model of the building. The reference point model is a BIM model of a component in which the reference point is modeled as one of the components of the building. This placement is performed automatically by the calculation unit 13.

[0061] Next, in step S23, the parameters used for conversion to the benchmark coordinate system (scale coefficient, projection correction, coordinate values ​​of the benchmark coordinate system, etc.) are stored in the reference point model (saved in association with the reference point model).

[0062] Next, in step S24, the coordinate values ​​of the reference point in the project coordinate system are calculated. This calculation is performed by the calculation unit 13. That is, in this step, the calculation unit 13 converts the coordinate values ​​of the benchmark coordinate system of the reference point model into coordinate values ​​of the project coordinate system.

[0063] Project Coordinate Method If the azimuth angle (angle as viewed from true north) of the Y axis of the project coordinate system (in this case, the reference line a3y) is θ, and the coordinate values ​​of the benchmark coordinate system of the building reference point a5 are (x1, y1, z1), the conversion from the coordinate values ​​(x2, y2, z2) of the benchmark coordinate system to the coordinate values ​​(x, y, z) of the project coordinate system is as follows. x=x2cosθ-y2sinθ-x1 y=x2sinθ+y2cosθ-y1 z=z2

[0064] Next, in step S25, the parameter used for conversion to the project coordinate system (the azimuth angle of the Y axis of the project coordinate system) is stored in the reference point model.

[0065] Next, in step S26, the coordinate values ​​of the public coordinate system, the benchmark coordinate system, and the project coordinate system are stored in the reference point model.

[0066] In this way, the reference point model can be imported into BIM. Also, the coordinate values ​​of the reference points can be converted from the public coordinate system to the benchmark coordinate system and the project coordinate system, and each coordinate value can be linked to the reference point model and saved.

[0067] Refer again to step S14 in Fig. 5. If it is determined in step S14 that the coordinate system of the CSV data is not a public coordinate system ("NO" in step S14), the process proceeds to step S15.

[0068] In step S15, it is determined whether the coordinate system of the CSV data is the benchmark coordinate system. This determination is made by the calculation unit 13. If it is determined that the coordinate system of the CSV data is the benchmark coordinate system ("YES" in step S15), the process proceeds to step S31 shown in FIG. 7.

[0069] In step S31, in the BIM, a reference point model is placed at the position of the coordinate values ​​of the benchmark coordinate system. This placement is automatically performed by the calculation unit 13.

[0070] Next, in step S32, the coordinate values ​​of the reference point in the public coordinate system are calculated. This calculation is performed by the calculation unit 13. That is, in this step, the calculation unit 13 converts the coordinate values ​​of the CSV data from the coordinate values ​​of the benchmark coordinate system to coordinate values ​​of the public coordinate system. The method of this conversion will be explained below. In the following, it is assumed that the coordinate values ​​of the benchmark a1 and boundary point a2 in the public coordinate system have already been stored in the storage unit of the calculation unit 13.

[0071] In Figure 10, x1, y1 indicate the coordinate values ​​of the benchmark a1 in the public coordinate system, and x3, y3 indicate the coordinate values ​​of the benchmark coordinate system of the intersection of the reference mark a3 (see Figure 4(b)). When converting the coordinate values ​​of the intersection of the reference mark a3 from the coordinate values ​​x3, y3 in the benchmark coordinate system to coordinate values ​​x, y in the public coordinate system, first calculate the distance s between the coordinate values ​​x1, y1 in the public coordinate system of the benchmark a1 and the coordinate values ​​x, y in the public coordinate system of the intersection of the reference mark a3 using the following equation 6.

[0072] s=αβ√(x3 2 +y3 2 ) (Number 6) Here, α is a scale factor and β is a projection correction.

[0073] Then, the direction angle t (angle with respect to the Y axis) from the benchmark a1 to the intersection point of the reference mark is calculated using the following equation 7.

[0074] t=tan -1 (x3 / y3) (Number 7)

[0075] Then, the coordinate values ​​x, y of the intersection point of the reference marks in the benchmark coordinate system can be calculated using the following equations 8 and 9. x=ssinT+x1(Number 8) y = scosT + y1 (Number 9)

[0076] Furthermore, the coordinate value z (Z coordinate value) of the intersection of the reference marks in the benchmark coordinate system can be calculated using the following equation 10.

[0077] z = z3 + z1 (number 10) Here, z1 indicates the Z coordinate value of the benchmark a1 in the public coordinate system, and z3 indicates the Z coordinate value of the intersection of the reference marks in the benchmark coordinate system.

[0078] In this way, the coordinate values ​​of the reference points can be converted from the coordinate values ​​of the benchmark coordinate system to the coordinate values ​​of the public coordinate system.

[0079] Next, in step S33, the parameters (scale coefficient, projection correction, coordinate values ​​of the public coordinate system, etc.) used for conversion to the public coordinate system are stored in the reference point model.

[0080] Next, in step S34, the coordinate values ​​of the reference point in the project coordinate system are calculated. This calculation is performed by the calculation unit 13. That is, in this step, the calculation unit 13 converts the coordinate values ​​of the CSV data from the coordinate values ​​of the benchmark coordinate system to the coordinate values ​​of the project coordinate system. This conversion can be performed in the same way as the method of converting the coordinate values ​​of the benchmark coordinate system to the coordinate values ​​of the project coordinate system (step S24).

[0081] Next, in step S35, the parameter used for conversion to the project coordinate system (the azimuth angle of the Y axis of the project coordinate system) is stored in the reference point model (saved in association with the reference point model).

[0082] Next, in step S36, the coordinate values ​​of the public coordinate system, the benchmark coordinate system, and the project coordinate system are stored in the reference point model.

[0083] In this way, the reference point model can be imported into BIM. Also, the coordinate values ​​of the reference points can be converted from the benchmark coordinate system to the public coordinate system and the project coordinate system, and each coordinate value can be stored in the reference point model.

[0084] Referring again to Fig. 5, if it is determined in step S15 that the coordinate system of the CSV data is not the benchmark coordinate system ("NO" in step S15), the process proceeds to step S41 shown in Fig. 8.

[0085] In step S41, the coordinate values ​​of the reference point in the benchmark coordinate system are calculated. This calculation is performed by the calculation unit 13. That is, in this step, the calculation unit 13 converts the coordinate values ​​of the CSV data from the coordinate values ​​in the project coordinate system to the coordinate values ​​in the benchmark coordinate system.

[0086] [Benchmark coordinate calculation method] If the azimuth angle (angle as viewed from true north) of the Y axis of the project coordinate system (in this case, reference line a3y) is θ, and the coordinate values ​​of the benchmark coordinate system of the building reference point a5 are (x1, y1, z1), the conversion from the coordinate values ​​(x2, y2, z2) of the project coordinate system to the coordinate values ​​(x, y, z) of the benchmark coordinate system is as follows. x=x2cosθ+y2sinθ+x1 y=-x2sinθ+y2cosθ+y1 z=z2

[0087] Next, in step S42, in the BIM, the reference point model (BIM model of the reference point) is placed at the position of the coordinate value of the benchmark coordinate system. This placement is performed by the calculation unit 13.

[0088] Next, in step S43, the parameter used for conversion to the benchmark coordinate system (the azimuth angle of the Y axis of the project coordinate system) is stored in the reference point model.

[0089] Next, in step S44, the coordinate values ​​of the reference point in the public coordinate system are calculated. This calculation is performed by the calculation unit 13. That is, in this step, the calculation unit 13 converts the coordinate values ​​of the CSV data from the coordinate values ​​of the benchmark coordinate system to the coordinate values ​​of the public coordinate system. This conversion can be performed in the same way as the method of converting the coordinate values ​​of the benchmark coordinate system to the coordinate values ​​of the public coordinate system (step S32 in FIG. 7).

[0090] Next, in step S45, the parameters (scale coefficient, projection correction, coordinate values ​​of the public coordinate system, etc.) used for conversion to the public coordinate system are stored in the reference point model.

[0091] Next, in step S46, the coordinate values ​​of the public coordinate system, the benchmark coordinate system, and the project coordinate system are stored in the reference point model (stored in association with the reference point model).

[0092] In this way, the reference point model can be imported into BIM. Also, the coordinate values ​​of the reference points can be converted from the coordinate values ​​of the project coordinate system to the coordinate values ​​of the public coordinate system and the project coordinate system, and each coordinate value can be linked to the reference point model and saved.

[0093] This completes the import of reference points into BIM.

[0094] When a BIM model of a building is loaded by a user (designer) and displayed on the display unit 14, the reference point model b included in the BIM model is also displayed on the display unit 14 (see FIG. 11). When the user selects the reference point model b on the display screen of the display unit 14 (for example, by clicking with a mouse), the coordinate values ​​of the public coordinate system, the coordinate values ​​of the benchmark (BM) coordinate system, and the coordinate values ​​of the project coordinate system of the reference point model b are displayed on the display screen of the display unit 14, as shown in FIG.

[0095] This allows users to design buildings while referring to the coordinate values ​​of the three coordinate systems. Therefore, when placing BIM models of components that make up a building on a BIM, users can determine the placement position based on the coordinate values ​​of the coordinate system that is most suitable for design among the three coordinate values ​​of a specified reference point. This makes it easier for users to design buildings using BIM models.

[0096] As described above, in the design support system 1, by reflecting control points on BIM, it is possible to share information between the site and BIM. Specifically, the coordinates of control points measured on site can be used to create design data. Furthermore, the coordinates of control points in BIM can be used for construction on site (for example, marking out). In this way, construction on site and design using BIM can be carried out while data is exchanged between the site and BIM.

[0097] Furthermore, in the design support system 1, simply selecting the coordinate system of the CSV data (step S13 in Fig. 5) automatically converts the coordinate system, reducing the time and effort required for coordinate conversion by the user. Furthermore, the coordinates of the reference points and the parameters used for converting the coordinate system can be centrally managed by BIM.

[0098] As described above, the design support system 1 according to this embodiment: a coordinate data acquisition unit (operation input unit 12 and calculation unit 13) capable of acquiring coordinate data in a plurality of different coordinate systems, the coordinate data indicating reference points in each process of a construction site of a building; a coordinate data conversion unit (calculation unit 13) that converts, when the coordinate data acquisition unit acquires coordinate data indicating a reference point, the acquired coordinate data into coordinate data in a coordinate system that is different from the coordinate system used for the reference point among a plurality of coordinate systems that can be acquired by the coordinate data acquisition unit; A model placement unit (calculation unit 13) that places a reference point model, which is a BIM model of the reference point, on the BIM model of the building based on coordinate data in the coordinate system before conversion by the coordinate data conversion unit, which indicates the one reference point, or coordinate data in the coordinate system after conversion by the coordinate data conversion unit; a display unit 14 capable of displaying the reference point model and displaying, as coordinate data representing the reference point model, coordinate data in a coordinate system before conversion by the coordinate data conversion unit and coordinate data in a coordinate system after conversion by the coordinate data conversion unit, with respect to the one reference point; It is equipped with the following.

[0099] This configuration allows for the sharing of information between the site and BIM.

[0100] The coordinate system used for the coordinate data indicating the one reference point includes: At least one of a coordinate system that uses the origin of a plane rectangular coordinate system (public coordinate system) or a coordinate system that uses a predetermined reference point (a reference point other than the origin of a plane rectangular coordinate system) as the origin (benchmark coordinate system, project coordinate system) is included, The other coordinate system different from the coordinate system used for the one reference point includes: This includes at least one of a coordinate system that uses the origin of a plane rectangular coordinate system and a coordinate system that uses a predetermined reference point as the origin.

[0101] This configuration allows coordinate values ​​of coordinate systems with different origins to be reflected in BIM.

[0102] Furthermore, the design support system 1 according to this embodiment includes: a coordinate system selection unit (operation input unit 12, display unit 14) that can select a coordinate system to be used for the coordinate data indicating the one reference point from a plurality of coordinate systems; The coordinate data conversion unit (calculation unit 13) When the coordinate system selection unit selects a coordinate system to be used for the coordinate data indicating the one reference point, the coordinate data in the coordinate system indicating the one reference point is automatically converted into coordinate data using the other coordinate system.

[0103] This configuration can reduce the effort required for coordinate conversion.

[0104] Moreover, the model placement unit (calculation unit 13) When the coordinate system selection unit selects the coordinate system to be used for the coordinate data indicating the one reference point, the reference point model is automatically placed on the BIM model of the building.

[0105] This configuration can reduce the effort required to place the reference point model.

[0106] In addition, the display unit 14 In response to the reference point model being selected on the display screen of the display unit, coordinate data in the coordinate system before conversion by the conversion unit, which indicates the one reference point, and coordinate data in the coordinate system after conversion by the conversion unit are displayed.

[0107] Such a configuration makes the design easier.

[0108] In addition, the design support program according to this embodiment A coordinate data acquisition step (e.g., step S12 in FIG. 5) for acquiring coordinate data in a plurality of different coordinate systems, the coordinate data indicating reference points in each process of the construction site of the building; a coordinate data conversion step (steps S21 and S24 in FIG. 6, steps S31 and S34 in FIG. 7, and steps S41 and S44 in FIG. 8) of converting the acquired coordinate data, when the coordinate data indicating one reference point is acquired in the coordinate data acquisition step, into coordinate data in a coordinate system different from the coordinate system used for the one reference point among a plurality of coordinate systems that can be acquired in the coordinate data acquisition step; A model placement step (step S22 in FIG. 6, step S32 in FIG. 7, step S42 in FIG. 8) of placing a reference point model, which is a BIM model of the reference point, on the BIM model of the building based on the coordinate data in the coordinate system before conversion by the coordinate data conversion step indicating the one reference point, or the coordinate data in the coordinate system after conversion by the coordinate data conversion step; a display step of displaying the reference point model and displaying, as coordinate data representing the reference point model, coordinate data in a coordinate system before conversion by the coordinate data conversion step and coordinate data in a coordinate system after conversion by the coordinate data conversion step, with respect to the one reference point; The above is executed by a computer.

[0109] This configuration allows for the sharing of information between the site and BIM.

[0110] Although the embodiment of the present invention has been described above, the present invention is not limited to the above configuration, and various modifications are possible within the scope of the invention described in the claims.

[0111] For example, in this embodiment, three coordinate systems (public coordinate system, benchmark coordinate system, and project coordinate system) are converted into each other, but two coordinate systems may be converted into each other, or four or more coordinate systems may be converted into each other. [Explanation of symbols]

[0112] 1 Design support system 12 Operation input section 13 Arithmetic section 14 Display section

Claims

1. a coordinate data acquisition unit capable of acquiring coordinate data in a plurality of different coordinate systems, the coordinate data indicating reference points in each process of a construction site of a building; a coordinate data conversion unit that, when the coordinate data acquisition unit acquires coordinate data indicating a reference point, converts the acquired coordinate data into coordinate data in a coordinate system that is different from the coordinate system used for the reference point among a plurality of coordinate systems that can be acquired by the coordinate data acquisition unit; A model placement unit that places a reference point model, which is a BIM model of the reference point, on a BIM model of the building based on coordinate data in a coordinate system before conversion by the coordinate data conversion unit that indicates the one reference point, or coordinate data in a coordinate system after conversion by the coordinate data conversion unit; a display unit capable of displaying the reference point model and displaying, as coordinate data representing the reference point model, coordinate data in a coordinate system before conversion by the coordinate data conversion unit and coordinate data in a coordinate system after conversion by the coordinate data conversion unit, with respect to the one reference point; A design support system equipped with the above.

2. The coordinate system used for the coordinate data indicating the one reference point includes: At least one of a coordinate system using the origin of a plane rectangular coordinate system and a coordinate system using a predetermined reference point as the origin is included, The other coordinate system different from the coordinate system used for the one reference point includes: At least one of a coordinate system using the origin of a plane rectangular coordinate system and a coordinate system using a predetermined reference point as the origin is included. The design support system according to claim 1 .

3. a coordinate system selection unit capable of selecting a coordinate system to be used for the coordinate data indicating the one reference point from among a plurality of coordinate systems; The coordinate data conversion unit when the coordinate system selection unit selects a coordinate system to be used for the coordinate data indicating the one reference point, automatically converting the coordinate data in the coordinate system indicating the one reference point into coordinate data using the other coordinate system; The design support system according to claim 2 .

4. The model placement unit When the coordinate system selection unit selects a coordinate system to be used for the coordinate data indicating the one reference point, the reference point model is automatically placed on the BIM model of the building. The design support system according to claim 3 .

5. The display unit In response to the reference point model being selected on the display screen of the display unit, coordinate data in the coordinate system before conversion by the coordinate data conversion unit, which indicates the one reference point, and coordinate data in the coordinate system after conversion by the coordinate data conversion unit are displayed. The design support system according to any one of claims 1 to 4.

6. a coordinate data acquisition step for acquiring coordinate data in a plurality of different coordinate systems, the coordinate data indicating reference points in each process of a construction site of a building; a coordinate data conversion step of converting, when the coordinate data indicating one reference point is acquired in the coordinate data acquisition step, the acquired coordinate data into coordinate data in a coordinate system that is different from the coordinate system used for the one reference point among a plurality of coordinate systems that can be acquired in the coordinate data acquisition step; A model placement step of placing a reference point model, which is a BIM model of the reference point, on the BIM model of the building based on coordinate data in the coordinate system before conversion by the coordinate data conversion step indicating the one reference point or coordinate data in the coordinate system after conversion by the coordinate data conversion step; a display step of displaying the reference point model and displaying, as coordinate data representing the reference point model, coordinate data in a coordinate system before conversion by the coordinate data conversion step and coordinate data in a coordinate system after conversion by the coordinate data conversion step, with respect to the one reference point; A design support program that allows a computer to execute the above.

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