Management assistance system for buildings or civil engineering structures

Abstract

The present application provides a management assistance system capable of highly accurately implementing comparison of a building or civil engineering structure as a management object and design data. The management assistance system includes a storage device (130) that stores design data that is data corresponding to a building information model (BIM) or a civil engineering information model (CIM), a measurement device (110) that measures a building or civil engineering structure in a non-contact manner in a real space and generates point cloud data, and a computer device (120) that processes the design data and the point cloud data, wherein the computer device (120) performs processing of generating surface data representing a surface of a shape represented by the point cloud data, collating combined data combined from the point cloud data and the surface data with the design data, and updating the design data based on a result of the collation.

Description

Technical Field

[0001] This invention relates to a management support system for buildings or civil structures. Background Technology

[0002] In recent years, Japan's Ministry of Land, Infrastructure, Transport and Tourism has published guidelines for BIM and CIM, and the adoption of BIM / CIM in the construction and civil engineering sectors is progressing.

[0003] Here, BIM stands for Building Information Modeling, which is a model created by adding various attribute data to a 3D model of a building generated on a computer. CIM stands for Construction Information Modeling, which is a model obtained by applying the concepts of BIM to the civil engineering field.

[0004] By introducing BIM / CIM from the planning, surveying, and design stages, information sharing in subsequent construction, maintenance, and management stages becomes easier, enabling a series of operations and business processes to be more efficient and sophisticated.

[0005] In addition, as a secondary effect of implementing BIM / CIM, it is expected that the better provision and maintenance management of public infrastructure will improve people's lives and increase the enthusiasm of practitioners in the construction and civil engineering fields.

[0006] Given the background described above, various systems based on the implementation of BIM / CIM have been proposed (e.g., Patent Document 1, Patent Document 2).

[0007] Patent document 1 discloses a system that uses the voxel method to transform a point group model obtained by scanning at different time points to generate new and old three-dimensional models, extracts their differences and performs analysis.

[0008] Patent document 2 discloses a system that: obtains and deletes the shaded parts of the points obtained by scanning the structure before and after the change, compares the remaining results after deletion, and extracts the differences of each structure.

[0009] Existing technical documents

[0010] Patent documents

[0011] Patent Document 1: Japanese Patent Application Publication No. 2016-103263

[0012] Patent Document 2: Japanese Patent Application Publication No. 2019-211264 Summary of the Invention

[0013] The problem the invention aims to solve

[0014] The common feature of the systems disclosed in Patent Documents 1 and 2 is that they compare and extract differences by scanning a group of points obtained from the structure being inspected.

[0015] However, the methods disclosed in these documents are merely specific examples, and there is room for proposing undisclosed methods.

[0016] This invention provides a management auxiliary system capable of accurately comparing buildings or civil structures under management with design data.

[0017] Solution for solving the problem

[0018] According to the present invention, a management assistance system for buildings or civil structures is provided, characterized in that it comprises: a storage device storing design data, wherein the design data is data corresponding to a three-dimensional BIM (Building Information Model) of the building being managed or a three-dimensional CIM (Civil Engineering Information Model) of the civil structure being managed; a measuring device measuring the building or civil structure in a non-contact manner in real space and generating point group data related to the building or civil structure; and a computer device processing the design data stored in the storage device and the point group data generated by the measuring device, wherein the computer device performs the following processing: generating surface data representing the shape represented by the point group data, comparing the combined data formed by combining the point group data and the surface data with the design data, and updating the design data stored in the storage device based on the comparison result.

[0019] Since point cluster data consists of discrete points, the comparison results can easily become unstable if directly compared with the design data corresponding to the three-dimensional representation of BIM or CIM.

[0020] On the other hand, according to the above invention, surface data representing the shape of the surface represented by point group data is temporarily generated, and the combined data formed by combining the surface data and the point group data is set as a comparison object for comparison with the design data, so the comparison result is more likely to be stable.

[0021] Therefore, compared with previous methods, the above invention can compare the buildings or civil structures being managed with the design data with high accuracy.

[0022] The effects of the invention

[0023] According to the present invention, a management auxiliary system is provided that can accurately compare buildings or civil structures as management objects with design data. Attached Figure Description

[0024] Figure 1 This is a structural diagram of the management auxiliary system in an embodiment of the present invention.

[0025] Figure 2 It is a schematic diagram showing the point group data measured by a laser scanner.

[0026] Figure 3 It is a schematic diagram illustrating the combination of data generated by a computer device.

[0027] Figure 4 These are flowcharts related to the management support system. Detailed Implementation

[0028] The embodiments of the present invention will now be described using the accompanying drawings. Furthermore, in all the drawings, the same reference numerals are used to denote the same constituent elements, and descriptions are omitted where appropriate.

[0029] <System Structure of Management Support System 100>

[0030] First, the system structure of the management support system 100 will be explained.

[0031] Figure 1 This is a structural diagram of the management auxiliary system 100 in an embodiment of the present invention.

[0032] like Figure 1 As shown, the management support system 100 includes a laser scanner 110 and a database consisting of a computer device 120 and a storage device 130.

[0033] The laser scanner 110 and the computer device 120 are configured to communicate with each other. The computer device 120 can send various data to the laser scanner 110 and can save various data received from the laser scanner 110 (including point group data as a scanning result) in the storage device 130.

[0034] The storage device 130 stores design data corresponding to BIM (Building Information Modeling) or CIM (Civil Engineering Information Modeling), wherein the BIM represents the building as the object of management in three dimensions, and the CIM represents the civil structure as the object of management in three dimensions.

[0035] In this embodiment, BIM refers to a three-dimensional model of a building that combines multiple objects corresponding to each structure disposed on the building. Furthermore, CIM refers to a three-dimensional model of a civil structure that combines multiple objects corresponding to each structure disposed on the civil structure.

[0036] Furthermore, the data stored in the storage device 130 is not limited to the design data described above, and may also include other data.

[0037] The laser scanner 110 is a measuring device that measures buildings or civil structures in real space in a non-contact manner and generates point group data related to the buildings or civil structures.

[0038] Furthermore, the laser scanner 110 is a specific example of the measuring device involved in this invention. However, the measuring device involved in this invention can be any three-dimensional sensor capable of measuring buildings or civil structures in a non-contact manner and generating point group data, or it can be replaced with other measuring devices. For example, the measuring device involved in this invention can also be implemented by a high-resolution camera that captures images of the building or civil structure being managed from various directions, and the point group data in this variant example can be generated by applying photogrammetry.

[0039] Figure 2 This is a schematic diagram illustrating point group data measured by laser scanner 110. The diagram shows point group data obtained as a result of scanning a part of a factory, including piping OB1, cable ladders OB2, control equipment OB3, and other parts (workers, pillars, walls, etc.).

[0040] In addition, the cable tray OB2 in the figure is a component used for wiring the cables connected to the control equipment OB3, but for convenience, these cables are not shown.

[0041] The computer device 120 uses the design data stored in the storage device 130 and the point group data generated by the laser scanner 110 to perform at least the following processes.

[0042] (i) The computer device 120 generates surface data representing the shape of the surface represented by the point group data.

[0043] (ロ) The computer device 120 compares the combined data, which is composed of point group data and surface data, with the design data.

[0044] (H) The computer device 120 updates the design data stored in the storage device 130 based on the comparison results.

[0045] The surface data generated by the above-described (i) process represents the shape of the component surface obtained by detecting feature points from the point group data generated by the laser scanner 110 and analyzing the detected feature points. For example, the computer device 120 analyzes the point group data through the (i) process to obtain surface data representing a cylinder, surface data representing a cuboid, surface data representing a lattice, etc. Various methods can be conceived regarding the method by which the computer device 120 generates surface data. For example, the computer device 120 can generate surface data based on a comparison (model-based matching) using model-based object recognition technology.

[0046] The computer device 120 combines the surface data obtained through the above-described (i) processing with the point group data obtained through analysis, or replaces the parts of the point group data that correspond to the surface data with the surface data, thereby setting the point group data and the surface data as a unified data. In the following description, this unified data is referred to as "combined data".

[0047] Figure 3 This is a schematic diagram illustrating the combined data generated by computer device 120. The diagram shows the following situation: From Figure 2 Extract the shapes of cylinders (equivalent to piping OB1), grid-like shapes (cable ladder OB2), and cuboid shapes (control equipment OB3) from the point group data shown, and replace the parts marked with shaded lines with surface data.

[0048] Alternatively, the shapes (workers, pillars, walls, etc.) captured in the unshaded areas of the figure do not necessarily mean that they cannot be detected by the computer device 120 involved in this invention; the computer device 120 is capable of detecting these shapes.

[0049] Specifically, the contrast in the above (ロ) process is the following process: based on the shape and configuration of the surface data obtained through the above (イ) process, the structure contained in the combined data is estimated, and a correspondence is established with the object in the design data.

[0050] For example, if the determined shape is a cylinder, the computer device 120 estimates the structure of that shape as piping; if the determined shape is a cuboid, the computer device 120 estimates the structure of that shape as control equipment; and if the determined shape is a lattice, the computer device 120 estimates the structure of that shape as a cable ladder.

[0051] Furthermore, the computer device 120 can, based on the shape of the portion of point group data that cannot be replaced with surface data, establish a correspondence between that portion and an object in the design data, while the other portions are replaced with surface data and thus established a correspondence with an object in the design data. For example, the computer device 120 can, as a point group data that cannot be replaced with surface data, establish a correspondence between that portion and an object in the design data. Figure 3 The point group located at the position of a column in a portion of the data that is not marked with a shaded line (the portion of the point group data that cannot be replaced with area data), based on the shape of the area where the point group is located and... Figure 3 The relative positions of the shaded areas (replaced with area data) are used to establish a correspondence between the point group and the column objects in the design data.

[0052] In this way, the computer device 120 can not only establish a correspondence between point groups that can be replaced by surface data and objects in the design data, but also establish a correspondence between point groups that are difficult to be replaced by surface data and objects in the design.

[0053] Therefore, the management support system 100 can establish a high-precision correspondence between point group data and design data, and can reduce the number of objects in the design data that are missed from the correspondence.

[0054] The process described above (ハ) refers to the process of updating the design data based on the results of the process described above (ロ) to change the design data stored in the storage device 130. Details of the process described above (ハ) will be described later.

[0055] <Processing flow for Management Support System 100>

[0056] Next, the processing flow of the management support system 100 will be explained.

[0057] Figure 4 This is a flowchart involving the management support system 100.

[0058] In step S101, the laser scanner 110 scans the building or civil structure that is the object of management, and generates point group data as a result of the scan.

[0059] In step S102, the computer device 120 generates surface data based on the point group data generated in step S101, and combines the surface data with the point group data.

[0060] In step S103, the computer device 120 compares the design data stored in the storage device 130 with the combination data generated in step S102.

[0061] In step S104, the computer device 120 determines, by comparing with the data in step S103, whether the shape of the object contained in the design data is detected from the combined data.

[0062] Here, the phrase "detecting the shape of an object contained in the design data from the combined data" has roughly the same meaning as the case where the object contained in the design data corresponds to a specific surface data or a specific point group data contained in the combined data, as described in the above (ロ) processing.

[0063] If the determination in step S104 is affirmative, determine whether a measurement date has been associated with the corresponding object established in the determination (step S105).

[0064] If the determination in step S105 is positive, it is considered that the object is an object that has been compared, that is, an object that also existed in the same place in the previous measurement. Therefore, the processing in step S106 is not performed, and the process proceeds to step S107.

[0065] On the other hand, if the determination in step S105 is negative, it is considered that the object is an object that has not been compared, that is, an object that was newly set up at the location after the last measurement, and therefore proceeds to the processing in step S106.

[0066] If the determination in step S104 is negative, the computer device 120 determines whether there is a shape in the combined data that does not conform to the shape of any object contained in the design data (step S108).

[0067] When the determination in step S108 is affirmative, the computer device 120, since it is unclear whether the point group is a designed point group, performs processing to determine the BIM or CIM object corresponding to the shape (step S109).

[0068] On the other hand, if the determination in step S108 is negative, the processing in step S109 is not performed, and the process proceeds to step S107.

[0069] When it is determined in step S109 that the shape corresponds to an object with a specific attribute, the computer device 120 appends the determined object to the design data based on the configuration of the shape in the combination data (step S110). For example, Figure 3The illustrated combined data includes a grid-like cluster of points (cable ladder OB2) corresponding to cable trays. However, during the design phase of the building being managed, the quantity and size of cables used for wiring via cable ladders are often unclear. In actual construction sites, cable ladders are frequently installed in locations different from those in the design. Under such circumstances, the computer device 120, by executing steps S108 to S110, can modify the design data stored in the storage device 130 to conform to the current situation.

[0070] Furthermore, when it is impossible to determine which attribute the object's shape conforms to during the processing in step S109, it is preferable that the computer device 120 does not change the design data for that shape. For example, Figure 3 The combined data shown in the figure contains a group of points with shapes similar to those of workers, but workers are not the objects managed by the management support system 100, and these shapes should not be reflected in the design data.

[0071] If the determination in step S105 is negative, or if a new object is added to the design data in step S110, the computer device 120 executes the processing in step S106.

[0072] In step S106, the computer device 120 updates the design data stored in the storage device 130 and associates the attribute information of the target object (the profile of the IFC (Industry Foundation Classes) file) with the scan date (the measurement date of the laser scanner 110) scanned in step S101.

[0073] In step S107, the computer device 120 displays the design data stored in the storage device 130 on a display device (not shown).

[0074] When displaying objects from design data, the computer device 120 highlights the objects with a color corresponding to the measurement date associated with the object's attribute information. Conversely, when no measurement date is associated with the object's attribute information in the design data (i.e., when the object has not yet been installed at the design site), the computer device 120 displays the object in a less conspicuous manner compared to the highlighted display. Here, "less conspicuous display" can be a normal display, a semi-transparent display, or no display (or a completely transparent display).

[0075] Since the computer device 120 displays the objects of the design data on the display device in a manner that updates the design data as described above, the user can visually identify the objects placed in the real space differently according to each period in which the measurement was performed. Furthermore, the user can visually identify the objects placed in the real space (the objects determined to be positive in step S104) and the objects not placed (other objects).

[0076] Furthermore, in this embodiment, the measurement time associated with the attribute information of the object is set to "day", so the management assistance system 100 is suitable for daily completion management of buildings or civil structures under construction.

[0077] However, by setting the measurement time associated with the object to a longer period of measurement time ("year", "month", etc.), it is possible to transform it into a management support system 100 suitable for managing the deterioration of completed buildings or civil structures over the years.

[0078] In addition, depending on the management purpose of the building or civil structure, the measurement time associated with the object may be set to a shorter period of measurement time ("hour", "minute", etc.).

[0079] As explained previously, the management assistance system 100 of this embodiment performs the determination in step S104 or the processing in step S106 to manage the changes in the status of buildings or civil structures that are the objects of management in the real space.

[0080] In addition, the management assistance system 100 of this embodiment performs the determination in step S108, the processing in step S109 and step S110, as a feature to feed back the gradually changing status of the building or civil structure that is the object of management into the design data.

[0081] Furthermore, the management assistance system 100 according to this embodiment performs the processing of step S107 so that the user can easily identify features as described above.

[0082] Because of these features, the management support system 100 can accurately compare the buildings or civil structures being managed with the corresponding BIM or CIM design data, thus appropriately assisting the user's management operations.

[0083] <Variation Example>

[0084] The embodiments of the present invention described above can be modified in various ways to achieve the objectives of the present invention.

[0085] Hereinafter, variations of the invention that have not yet been described will be mentioned.

[0086] exist Figure 1 The system structure illustrated may include components that are omitted or additional components not shown. Furthermore, in... Figure 1 The system structure shown in the diagram can also be realized by multiple constituent elements, which are shown as a single constituent element.

[0087] exist Figure 4 The flowchart contains steps (processing and judgment), some parts can be omitted, and steps not shown in the flowchart can be added.

[0088] In addition, regarding Figure 4 At least a portion of the processing and determination described in the flowchart may be based on machine learning, or known techniques may be applied within the scope of achieving the purpose of this invention.

[0089] In the above embodiments, the following meaning is explained: when the determination in step S104 is positive (that is, when a shape that matches the first object contained in the design data is detected from the combination data by comparison), the computer device 120 updates the design data so that the first object can be distinguished from other objects.

[0090] Alternatively, or based on this process, when the computer device 120 detects a second object from the design data that is not included in the shape represented by the combination data by comparison, it updates the design data stored in the storage device so that the second object can be distinguished from other objects.

[0091] The above-described implementation method is the update processing of design data related to an object that has been constructed according to the design (the first object). The variation is the update processing of design data related to an object that has been designed but not constructed (the second object). Although they are in a different relationship, the effect is the same.

[0092] This implementation method incorporates the following technical concepts.

[0093] (1) A management assistance system for buildings or civil structures, characterized in that it comprises: a storage device storing design data, the design data being data corresponding to a BIM (Building Information Model) representing the building as the management object in three dimensions or a CIM (Civil Engineering Information Model) representing the civil structure as the management object in three dimensions; a measuring device measuring the building or civil structure in a non-contact manner in real space and generating point group data related to the building or civil structure; and a computer device processing the design data stored in the storage device and the point group data generated by the measuring device, wherein the computer device performs the following processing: generating surface data representing the shape of the surface represented by the point group data, comparing the combined data formed by combining the point group data and the surface data with the design data, and updating the design data stored in the storage device based on the comparison result.

[0094] (2) The management support system for buildings or civil structures according to (1), wherein,

[0095] When the computer device detects a shape from the combined data that does not conform to the shape contained in the design data by comparison, it determines the object in the BIM or CIM corresponding to the shape and updates the design data stored in the storage device by appending the determined object at the location where the shape was detected.

[0096] (3) The management support system for buildings or civil structures according to (2), wherein,

[0097] When the computer device updates the design data stored in the storage device in such a way that the determined object is added at the location where the shape is detected, it measures the measurement time of the point group data that is compared with the design data by associating the attribute information of the object with the object.

[0098] (4) A management support system for buildings or civil structures according to any one of (1) to (3), wherein,

[0099] The computer device, for the portion of the point group data that cannot be replaced by the surface data, establishes a correspondence between the portion and the object of the design data based on the shape of the portion and the relative positional relationship between the portion and other portions, while the other portions are replaced by the surface data and establish a correspondence with the object of the design data.

[0100] (5) A management support system for buildings or civil structures according to any one of (1) to (4), wherein,

[0101] The computer device performs at least one of the following two processes: when a shape conforming to a first object contained in the design data is detected from the combined data by comparison, the design data stored in the storage device is updated so that the first object can be distinguished from other objects; and when a second object not contained in the shape represented by the combined data is detected from the design data by comparison, the design data stored in the storage device is updated so that the second object can be distinguished from other objects.

[0102] (6) The management support system for buildings or civil structures according to (5), wherein,

[0103] When the computer device updates the design data stored in the storage device, it measures the measurement time of the point group data that is compared with the design data by associating the attribute information of the first object or the second object.

[0104] (7) A management support system for buildings or civil structures according to any one of (1) to (6), wherein,

[0105] The computer device performs an estimation process to estimate the structure contained in the combined data based on the shape of the generated surface data. When comparing the combined data with the design data, it establishes a correspondence between the BIM or CIM object corresponding to the structure estimated by the estimation process and the surface data.

[0106] (8) The management support system for buildings or civil structures according to (7), wherein,

[0107] In the estimation process, when the shape of the surface data is cylindrical, the structure is estimated as piping; when the shape of the surface data is lattice-like, the structure is estimated as a cable ladder.

[0108] This application claims priority based on Japanese Application Special Hoc 2021-66211, filed on April 9, 2021, the entire contents of which are incorporated herein by reference.

[0109] Explanation of reference numerals in the attached figures

[0110] 100: Management support system; 110: Laser scanner; 120: Computer device; 130: Storage device.

Claims

1. A management support system for buildings or civil structures, characterized in that, have: A storage device that stores design data, which is data corresponding to a Building Information Model (BIM) that represents a building as a management object in three dimensions, or a Civil Engineering Information Model (CIM) that represents a civil structure as a management object in three dimensions. A measuring device that measures the building or civil structure in real space in a non-contact manner and generates point cluster data related to the building or civil structure; as well as A computer device that processes the design data stored in the storage device and the point group data generated by the measuring device. The computer device performs the following processing: Generate surface data representing the shape of the surface represented by the point group data. The combined data, which is formed by combining the point group data and the surface data, is compared with the design data. When any shape of an object that does not conform to the design data is detected from the combined data by comparison, the object of the BIM or CIM corresponding to the shape is determined, and the design data stored in the storage device is updated by appending the determined object at the location where the shape was detected.

2. A management support system for buildings or civil structures, characterized in that, have: A storage device that stores design data, which is data corresponding to a Building Information Model (BIM) that represents a building as a management object in three dimensions, or a Civil Engineering Information Model (CIM) that represents a civil structure as a management object in three dimensions. A measuring device that measures the building or civil structure in real space in a non-contact manner and generates point cluster data related to the building or civil structure; as well as A computer device that processes the design data stored in the storage device and the point group data generated by the measuring device. The computer device performs the following processing: Generate surface data representing the shape of the surface represented by the point group data. The combined data, which is formed by combining the point group data and the surface data, is compared with the design data. The design data stored in the storage device is updated based on the results obtained from the comparison. For the portion of the point group data that cannot be replaced by the surface data, based on the shape of the portion and its relative positional relationship with other portions, the portion is associated with an object in the design data, while the other portions are replaced by the surface data and associated with an object in the design data.

3. A management support system for buildings or civil structures, characterized in that, have: A storage device that stores design data, which is data corresponding to a Building Information Model (BIM) that represents a building as a management object in three dimensions, or a Civil Engineering Information Model (CIM) that represents a civil structure as a management object in three dimensions. A measuring device that measures the building or civil structure in real space in a non-contact manner and generates point cluster data related to the building or civil structure; as well as A computer device that processes the design data stored in the storage device and the point group data generated by the measuring device. The computer device performs the following processing: Generate surface data representing the shape of the surface represented by the point group data. When comparing the combined data, which is formed by combining the point group data and the area data, with the design data, an estimation process is performed to estimate the structures contained in the combined data based on the shape of the generated area data. Then, a correspondence is established between the BIM or CIM objects corresponding to the structures estimated through the estimation process and the area data. The design data stored in the storage device is updated based on the results obtained from the comparison. In the estimation process, When the shape of the surface data is cylindrical, the structure is estimated to be a pipework. When the shape of the surface data is lattice-like, the structure is estimated to be a cable ladder.

Images