JP7184249B2 - Lightning protection range generation system and program - Google Patents

Description

The present invention relates to a lightning protection coverage generation system and program.

BACKGROUND ART Conventionally, structures such as buildings are protected by lightning protection equipment such as lightning rods. When designing the arrangement of this lightning protection equipment, the range protected from lightning by the lightning protection equipment (hereinafter referred to as "lightning protection range") is determined. A rotating sphere method is generally used as a method for determining the lightning protection range. The use of CAD has been proposed in order to efficiently determine the lightning protection range by the rotating sphere method.

Japanese Patent Laid-Open No. 2002-200003 discloses reading building drawing data into a CAD and drawing a sphere by the rotating sphere method according to an operator's input. Japanese Patent Laid-Open No. 2002-200001 discloses that three-dimensional data of a lightning protection system is combined with three-dimensional data of a building, and a protected area and an unprotected area are calculated using the rotating sphere method.

JP-A-2005-99942 Patent No. 4864636

In the conventional technology, CAD data of a structure created at the time of construction is used as the original data for the simulation of the lightning protection range. Normally, CAD data is created only for structures to be built, so simulations were performed for each structure alone.

There are also cases where CAD data is created for multiple structures and simulations are performed using lightning protection equipment. Furthermore, the simulation was performed in a state where the exact positional relationship of multiple structures could not be reflected.

Therefore, in environments where the above assumptions do not hold, such as when there is a difference in height on the site or when many structures are located irregularly, it was difficult to simulate the range protected by lightning protection equipment appropriately. . In particular, it has been difficult to confirm whether other structures are protected by a lightning protection system (for example, a lightning rod installed in a building structure) whose positional relationship with a certain structure is fixed.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and it is an object of the present invention to provide a technique capable of appropriately simulating whether other structures are protected by a lightning protection system intended for a certain structure. .

(1) A shape acquisition unit that acquires the three-dimensional shape of a target site, and a lightning protection equipment acquisition unit that acquires layout information of lightning protection equipment to be placed on the site, including the height of the lightning protection equipment. a protected area generator for generating a three-dimensional shape of an area protected from lightning by the lightning protection equipment based on the arrangement information of the lightning protection equipment and the three-dimensional shape of the site; and a three-dimensional shape of the protected area. and a three-dimensional model including three-dimensional shapes and three-dimensional positions of a plurality of structures arranged on the site, the plurality of structures included in the three-dimensional model being the lightning protection equipment. a protection range output unit for outputting information indicating whether or not the generated protection range is within the lightning protection range generation system.

(2) In (1), the shape acquisition unit acquires a point group that constitutes the surface of the site and the structure generated by surveying, and acquires a three-dimensional shape of the site based on the acquired point group. and a three-dimensional model including three-dimensional shapes and three-dimensional positions of a plurality of structures located on said site.

(3) In (2), the shape acquisition unit acquires a plurality of images of the site and the structure photographed from the air so that the photographing ranges overlap each other. , calculating a point group that constitutes the surface of the site and the structure by a multi-viewpoint image measurement method based on the acquired plurality of images, and based on the calculated point group, the three-dimensional shape of the site and the A lightning protection area generation system that acquires 3D models of multiple structures.

(4) In (2) or (3), the shape acquisition unit obtains a three-dimensional shape calculated using a stereoplotter based on the plurality of images, and is part of the plurality of structures. A system for generating a lightning protection area that updates the three-dimensional model of the part of the structure based on the three-dimensional shape of the.

(5) In any one of (1) to (4), the shape acquisition unit acquires a point group that constitutes the surface of the site generated by surveying, and based on the acquired point group, the site and information indicating the three-dimensional shapes of the plurality of structures and the arrangement of the structures on the site as a three-dimensional model of the structures.

(6) In any one of (1) to (5), the protection range generator generates a plurality of the A three-dimensional shape of a protected range from lightning by a lightning protection system is generated, and the protected range output unit outputs a three-dimensional shape of the plurality of protected ranges and a three-dimensional shape of a plurality of structures arranged on the site. and a three-dimensional model including three-dimensional positions, outputting information indicating whether the plurality of structures are within the protection range corresponding to the protection level associated with the structures. Protection coverage generation system.

(7) In any one of (1) to (6), the protection range output unit outputs the generated three-dimensional shape of the protection range and the three-dimensional shapes of the plurality of structures included in the three-dimensional model. and the three-dimensional position, extracting an area that is not included in the generated protection range of the lightning protection equipment from among the plurality of structures included in the three-dimensional model, and outputting the extracted area. , lightning protection range generation system.

(8) In any one of (1) to (6), the protection range output unit displays a plurality of structures included in the three-dimensional model in three dimensions, and displays the generated three-dimensional shape of the protection range. , based on the three-dimensional shapes and three-dimensional positions of the plurality of structures included in the three-dimensional model, the generated lightning protection equipment among the regions of the plurality of structures included in the three-dimensional model; A lightning protection coverage generation system that displays areas that are not covered by a protected coverage differently than other areas.

(9) A shape acquisition unit that acquires the three-dimensional shape of a target site, a lightning protection equipment acquisition unit that acquires layout information of lightning protection equipment to be placed on the site, including the height of the lightning protection equipment, a protection range generating unit that generates a three-dimensional shape of a range protected from lightning by the lightning protection equipment based on the arrangement information of the lightning protection equipment and the three-dimensional shape of the site; and a three-dimensional shape of the protection range; and a three-dimensional model including three-dimensional shapes and three-dimensional positions of a plurality of structures arranged on the site, the plurality of structures included in the three-dimensional model generating the lightning protection equipment. A program for causing a computer to function as a protection range output unit that outputs information indicating whether or not the program is within the specified protection range.

INDUSTRIAL APPLICABILITY According to the present invention, it is possible to appropriately simulate whether other structures are protected by lightning protection equipment intended for a certain structure.

1 is a diagram showing an example of a hardware configuration of a lightning protection range generation system according to an embodiment of the present invention; FIG. 1 is a diagram schematically showing the process of photogrammetry; FIG. FIG. 3 is a block diagram showing functions realized by the lightning protection range generation system; 4 is a flowchart showing an overview of processing executed by a lightning protection range generation system; It is a figure explaining correction|amendment of a structure. It is a figure explaining arrangement|positioning of a lightning protection installation. FIG. 4 is a diagram for explaining the relationship between the generated lightning protection range and the structure; FIG. 10 is a diagram showing an example of a displayed lightning protection range;

An embodiment of the present invention will be described below with reference to the drawings. Those appearing components having the same function are denoted by the same reference numerals, and the description thereof is omitted.

FIG. 1 is a diagram showing an example of a hardware configuration of a lightning protection range generation system according to an embodiment of the present invention. The lightning protection area generation system includes a protection area calculation device 1 , a stereo plotting device 2 , an unmanned aerial vehicle 3 , and a camera 5 mounted on the unmanned aerial vehicle 3 .

The protection range calculation device 1 is, for example, a server computer or a personal computer. The protection range calculation device 1 includes a processor 11 , a storage section 12 , a communication section 13 and an input/output section 14 .

The processor 11 operates according to programs stored in the storage unit 12 . The processor 11 also controls the communication unit 13 and controls devices connected to the input/output unit 14 . The program may be provided by being stored in a computer-readable storage medium such as a flash memory or DVD-ROM, or may be provided via the Internet or the like. .

The storage unit 12 is composed of a memory device such as a RAM or a flash memory, or a hard disk drive. The storage unit 12 stores the above program. The storage unit 12 also stores information and calculation results input from each unit.

The communication unit 13 realizes a function of communicating with other devices, and is configured by, for example, a wired LAN integrated circuit. The communication unit 13 transmits and receives information to and from other devices under the control of the processor 11 . The communication unit 13 also inputs the received information to the processor 11 and the storage unit 12 .

The input/output unit 14 includes a video controller that controls the display output device, a controller that acquires data from the input device, and the like. Input devices include keyboards, mice, and touch panels. Under the control of the processor 11, the input/output unit 14 acquires data input by the user operating the input device, and outputs display data to the display output device. The display output device is, for example, an externally connected display device or printer.

The stereoplotting device 2 is a device that obtains three-dimensional coordinates of the ground surface and the shape of building structures based on photogrammetric techniques from a plurality of overlapped aerial photographs. Since the stereoplotting device 2 is publicly known, detailed description thereof will be omitted.

The unmanned aerial vehicle 3, which is also called a drone, is an aircraft equipped with a camera 5 and captures a plurality of images for so-called photogrammetry.

FIG. 2 is a diagram schematically showing the process of photogrammetry. As shown in FIG. 2, the unmanned aerial vehicle 3 captures a plurality of images with the attached camera 5 while moving over the site 30 that is the target of this simulation. Here, the unmanned aerial vehicle 3 captures a plurality of images such that the capturing ranges 71 of adjacent images overlap each other. In addition, in order to improve the accuracy of point cloud generation processing, which will be described later, a plurality of reference points whose positional relationships have been measured in advance are provided on the site 30, and the unmanned aerial vehicle 3 is positioned at each of these reference points. It may be captured to be included in any image. Furthermore, in order to improve the accuracy, a GPS (Global Positioning System) installed in the unmanned aerial vehicle 3 may be used to add position information including height information of the shooting point to the image. It should be noted that instead of overlapping single photographs as described above, it is also possible to use moving images that are continuously photographed so as to cover the entire area of the target site 30 . As for a specific method of photographing, it is sufficient to photograph an image that can be used by known photogrammetry using, for example, the SfM (Structure from Motion) method, and a detailed description thereof will be omitted here.

In the example of FIG. 2, buildings 32a, 32b, 32c, 32d, tanks 32i, 32j, 32k, etc. are provided on the site 30. In FIG. These are building structures, collectively referred to as structures 32 below. A plurality of structures 32 are spaced apart from each other. Although not shown in FIG. 2, existing lightning protection equipment (lightning rod 41 and copper wire 42) is provided in or around the structure 32, and the following description assumes that these are photographed as images. .

Next, a method for generating the lightning protection range 81 (see FIG. 7) in the lightning protection range generation system will be described. FIG. 3 is a block diagram showing functions realized by the lightning protection range generation system. The lightning protection area generation system functionally includes a shape acquisition unit 51 , a lightning protection facility acquisition unit 52 , a protection area generation unit 53 , and a protection area output unit 55 . Moreover, the shape acquisition unit 51 functionally includes an image acquisition unit 56 , a point group generation unit 57 , a model generation unit 58 , and a model correction unit 59 . These functions are realized by the processor 11 included in the protection range calculation device 1 executing a program stored in the storage unit 12 and controlling the communication unit 13 and the input/output unit 14 as necessary. Here, these functions and processes may be realized by a system consisting of multiple computers. For example, the processing of the image acquisition unit 56 and the point group generation unit 57 may be implemented by another computer.

The shape acquisition unit 51 acquires the three-dimensional shape of the site 30 to be simulated and the three-dimensional model including the three-dimensional shapes and three-dimensional positions of the multiple structures 32 arranged on the site 30 . More specifically, the shape acquisition unit 51 acquires a point group that constitutes the surface of the site 30 and the structure 32 generated by surveying such as photogrammetry, and based on the acquired point group, determines the shape of the site 30. A dimensional shape and a 3D model including 3D shapes and 3D positions of the plurality of structures 32 are obtained.

The image acquisition unit 56 acquires a plurality of images of the site 30 and the structure 32 photographed from the air by the unmanned aerial vehicle 3 and photographed such that the photographing ranges 71 overlap each other. The point group generation unit 57 calculates point groups forming the surfaces of the site 30 and the structure 32 by a multi-viewpoint image measurement method such as SfM based on a plurality of acquired images. The model generator 58 generates and acquires the three-dimensional shape of the site 30 and the three-dimensional model of the structure 32 based on the calculated point group. The model correction unit 59 creates a three-dimensional model of the structure 32 based on the three-dimensional shape of the structure 32 calculated using the stereo plotting device 2 from at least two images out of a plurality of captured images. Update.

The lightning protection equipment acquisition unit 52 acquires the arrangement information of the lightning protection equipment arranged on the site 30 . This arrangement information includes information on the height of the lightning protection equipment. The layout information is information indicating the three-dimensional positional relationship between the site 30 and the lightning protection equipment.

Based on the arrangement information of the lightning protection equipment acquired by the lightning protection equipment acquisition unit 52 and the three-dimensional shape of the site 30, the protection range generation unit 53 uses, for example, the rotating sphere method to determine the lightning protection range 81 from lightning by the lightning protection equipment. Generate a 3D shape. In the rotating sphere method, a sphere is generated that is in contact with two or more lightning protection equipment or in contact with the lightning protection equipment and the ground, and the area on the structure 32 side of the envelope of the surface of the sphere is determined as the lightning protection range. method. The radius of this sphere depends on the protection level indicating the strength of protection, for example, the radii for protection levels I, II, III and IV are 20 m, 30 m, 45 m and 60 m, respectively.

The protection range output unit 55 outputs the generated three-dimensional shape of the lightning protection range 81 . Further, based on the generated three-dimensional shape of the lightning protection range 81 and the three-dimensional shapes and three-dimensional positions of the plurality of structures 32 acquired by the shape acquisition unit 51, the lightning protection A region not included in the range 81 is extracted and the extracted region is output. In addition, the protection range output unit 55 three-dimensionally displays the plurality of structures 32 acquired by the shape acquisition unit 51, and generates the three-dimensional shape of the lightning protection range 81 and the three-dimensional shapes of the multiple structures 32. and the three-dimensional position, an area that is not included in the generated lightning protection range 81 among the areas forming the surfaces of the plurality of structures may be displayed in a manner different from other areas.

Next, the flow of processing executed by the lightning protection range generation system will be described. FIG. 4 is a flowchart showing an outline of processing executed by the lightning protection range generation system. Before the processing shown in FIG. 4 is executed, the camera 5 of the unmanned aerial vehicle 3 captures a plurality of images of the site 30 and the structure 32 to be simulated for the lightning protection range 81 such that the photographing ranges 71 overlap each other. , or a moving image covering the entire site 30 is captured.

The image acquisition unit 56 acquires a plurality of images or moving images captured by the camera 5 of the unmanned aerial vehicle 3 (step S101). Data of a plurality of images taken by the camera 5 may be temporarily stored in a computer that controls the unmanned aerial vehicle 3, and then the data may be acquired by the image acquisition unit 56 via a network. 5 may be stored in a flash memory or the like, and the image acquisition unit 56 may read the stored data.

Next, the point cloud generation unit 57 applies a multi-viewpoint measurement method such as SfM to the plurality of acquired images to generate point cloud data of the site 30 and the structure 32 on the site 30 . If the acquired image is a moving image, only necessary single images are extracted and applied. The point cloud data includes coordinate data of a plurality of points forming the surfaces of the site 30 and the structure 32 . The point cloud generating unit 57 may generate the coordinates of each point included in the point cloud using the actual positions of the reference points included in the plurality of images in addition to the plurality of images themselves. The coordinates of each point may be generated using the shooting position information of each image.

When the point cloud is generated, the model generator 58 determines the 3D shape of the site 30 and the 3D model including the 3D shape and 3D position of the structure 32 based on the point cloud data ( step S103). More specifically, the model generation unit 58 identifies a plurality of points that form the surface of the terrain from the point cloud data, and defines the ground surface obtained according to the identified plurality of points as the three-dimensional shape of the site 30. get. In addition, the model generating unit 58 identifies a plurality of points forming the surface of the structure 32 from the point cloud data, and obtains the surface of the structure 32 according to the identified plurality of points. Get a 3D model. Note that the model generator 58 may simply acquire the point cloud as a three-dimensional model of the ground surface of the site 30 and the structure.

Further, the model generation unit 58 may acquire the three-dimensional shape of the site 30 from the point cloud data, and acquire the data representing the three-dimensional shape of the structure 32 from other data such as CAD data at the time of design. . In this case, when reading the CAD data, the model generation unit 58 acquires the position on the site 30 from the operator, or acquires the planar position information included in the CAD data. Obtain a 3D model that includes not only the 3D shape of the , but also the 3D position. Note that the model generating unit 58 may acquire data of the three-dimensional shape of the site 30 and the three-dimensional model of the structure 32 generated by another system.

When the three-dimensional shape of the site 30 and the three-dimensional model of the structure 32 are determined, the model correction unit 59 acquires from at least two images out of the plurality of captured images using the stereo plotting device 2 , acquire the coordinates of points on the surface of some of the structures 32, and correct the three-dimensional model of the structures 32 based on the acquired coordinates of the points (step S104).

FIG. 5 is a diagram for explaining correction of the structure 32. FIG. A building 32e is shown as the structure 32 in FIG. A plurality of points acquired by the multi-viewpoint image measurement method are not necessarily the ends of the structure 32 accurately, so the generated three-dimensional model tends to have rounded ends of the structure 32 . In addition, errors may occur when generating point clouds using the multi-viewpoint image measurement method. The stereoplotting device 2 acquires the end points 75 at the ends of the surfaces forming the structure 32 in the plurality of images, which are manually designated by the operator, and calculates the coordinates of these end points 75 . The model correction unit 59 acquires the coordinates of the endpoints 75, and further receives information from the operator such as straight lines and planes (see the dashed line in FIG. 5) that form the surface of the structure 32 and connect the endpoints 75. The model correction unit 59 updates the three-dimensional model of the structure 32 from straight lines, planes, etc. connecting the endpoints 75 . Correction of the structure 32 only needs to be performed on a portion that greatly affects the calculation of the lightning protection range 81, and only a part of a specific structure 32 may be corrected.

When the three-dimensional shape of the site 30 and the three-dimensional model of the structure 32 are determined or updated, the lightning protection equipment acquisition unit 52 acquires the arrangement of the lightning protection equipment (step S105).

FIG. 6 is a diagram for explaining the arrangement of the lightning protection equipment, and is a diagram in which the lightning protection equipment is arranged three-dimensionally at the same angle as the diagram shown in FIG. Although the structure 32 is indicated by a dashed line in FIG. 6, it is for the sake of simplification of explanation, and the structure 32 itself is not included in the actual layout data of the lightning protection equipment. The lightning protection equipment includes a lightning rod 41 arranged to extend upward from the roof of the structure 32, a copper wire 42 provided at the edge of the roof, and a lightning protection tower 43 erected directly on the ground. The lightning protection equipment acquisition unit 52 may acquire the arrangement of the lightning protection equipment input by the operator with reference to the three-dimensional model of the structure 32, or may obtain the lightning protection equipment from the point cloud data generated by the point cloud generation unit 57. Equipment may be extracted. Alternatively, the design information of the lightning protection equipment created by CAD data or the like may be acquired by arranging it on the three-dimensional shape of the site 30, or when the three-dimensional model of the structure 32 is updated, The arrangement information of the lightning protection equipment may be obtained from the plurality of images obtained by using the stereo plotting device 2 .

When the layout of the lightning protection equipment is obtained, the protection range generation unit 53 generates the lightning protection range 81 based on the three-dimensional shape of the site 30 and the layout of the lightning protection equipment (step S106). The protection range generation unit 53 obtains a rotating sphere that passes through the ground of the site 30 and the tip of the lightning rod 41 or the lightning tower 43, the point on the copper wire 42, and the ground of the site 30 without any leakage by, for example, the rotating sphere method. , an area in which none of the rotating spheres exist and in which the lightning protection equipment exists is generated as a lightning protection range 81 . As the radius of the rotating sphere, a value (for example, 60 m) defined according to the lightning protection level set for each structure 32 is used. The protection range generator 53 may generate the lightning protection range 81 for each of the protection levels in advance. Although the rotating sphere method is used to generate the lightning protection range 81 in the present embodiment, the protection angle method or other methods of generating the lightning protection range may be used. Furthermore, the rotating sphere method and the protective angle method may be used together.

Then, the protection range output unit 55, based on the generated three-dimensional shape of the lightning protection range 81 and the three-dimensional models of the plurality of structures 32 acquired by the shape acquisition unit 51, out of the structures 32, A region that is not included in the lightning protection range 81 is extracted (step S107). Protected area output unit 55 outputs the extracted area to storage unit 12 .

FIG. 7 is a diagram illustrating the relationship between the generated lightning protection range 81 and the structure 32. As shown in FIG. For ease of explanation, FIG. 7 shows a two-dimensional view of the structure 32 and the like viewed from the side. As shown in FIG. 7, when the height of the ground is different between structures 32m and 32n having a clear positional relationship with the lightning protection equipment, such as a lightning rod 41, and the other structure 32p. There is Then, due to the difference in ground height, an unprotected area 83, which is an area of the structure 32p that is not included in the lightning protection range 81, is different from when the structures 32m, n, and p have the same height. For example, compared to the case where the height is the same, the area protected by the lightning rod 41 of the structure 32n arranged at a position higher than the structure 32p is increased, and the area protected by the lightning rod 41 of the structure 32m arranged at a position lower than the structure 32p is increased. The area protected by the lightning rod 41 is reduced. Furthermore, since the position of the rotating sphere passing through the ground and the lightning rods 41 of the structures 32m and 32n also changes due to the difference in ground height, the lightning protection range 81 itself is also required to be determined more accurately.

When the unprotected area 83 is extracted, the protection range output unit 55 generates a three-dimensional image of the structure 32 in a manner that makes it possible to see whether or not it exists within the lightning protection range 81, and displays the image on the display device. output (step S108). Here, the protection range output unit 55 generates a three-dimensional image corresponding to the three-dimensional model of the structure 32 and the three-dimensional shape of the site 30 . Furthermore, the protected area output unit 55 draws the structure 32 so that the unprotected area 83 and the area included in the lightning protected area 81 have different display modes such as color and brightness. The protected area output unit 55 may change the display mode by coloring the unprotected area 83 extracted in step S107, or may render the boundary surface at the end of the lightning protected area 81 translucent. , the display mode may be changed by coloring the area included in the lightning protection range 81 .

After the unprotected area 83 is extracted, the operator may add the lightning protection equipment to an arbitrary position by operating the screen while checking the status of the unprotected area 83 on the screen. When the lightning protection equipment is added, the protection range output unit 55 may update the lightning protection protection range 81 and display a new unprotected range 83 . New lightning protection equipment may be designed by repeating the operations of adding lightning protection equipment and moving existing lightning protection equipment until all structures 32 are within the lightning protection range 81 .

The three-dimensional model may have lightning protection level information associated with each structure 32 . In that case, the protection coverage output unit 55 selects, for each of the structures 32, the lightning protection coverage 81 generated for the protection level associated with that structure 32, and the lightning protection coverage for which the structure 32 was selected. 81 may be identified.

FIG. 8 is a diagram showing an example of a displayed lightning protection range 81. As shown in FIG. In the example of FIG. 8, the boundary of the lightning protection area 81 protected by the lightning tower 43 is indicated by a dashed line, and the area surrounded by the dashed line is actually colored with a translucent boundary surface. In the example of FIG. 8, the areas of the buildings 32a, 32b and the tank 32i that are included in the lightning protection range 81 are indicated by dashed lines, and are displayed differently from the unprotected area 83 drawn by solid lines.

As described above, in the embodiment of the present invention, information indicating the height difference of the site 30 is acquired and used to generate the lightning protection range 81, thereby defining the positional relationship with the specific structure 32. It is possible to more appropriately simulate whether or not the existing lightning protection equipment will protect other structures 32 from lightning, and this can be used as examination information for reconstructing the lightning protection equipment.

In addition, by acquiring the current state of the site 30 and the structure 32 from photogrammetry by the unmanned aerial vehicle 3, the information necessary for the simulation of the lightning protection range 81, which is the structure of the site 30 and the structure 32, can be obtained from individual design data, etc. can be obtained without collecting Further, the actual structure 32 often differs from the design drawing due to subsequent extension or reconstruction. Acquisition by photogrammetry does not matter if there is a difference between the design drawing and the actual structure, and it becomes possible to perform an accurate simulation more easily.

Note that the method for surveying the current state of the site 30 and the structure 32 is not limited to photogrammetry using the multi-viewpoint image measurement method. Point cloud data representing the structure of the structure 32 may be acquired by a surveying technique such as a laser.

1 protection range calculation device 2 stereo plotting device 3 unmanned aerial vehicle 5 camera 11 processor 12 storage unit 13 communication unit 14 input/output unit 30 site 32, 32m, 32n, 32p structure 32a, 32b, 32c, 32d, 32e building, 32i, 32j, 32k tank, 41 lightning rod, 42 copper wire, 43 lightning tower, 51 shape acquisition unit, 52 lightning protection equipment acquisition unit, 53 protection range generation unit, 55 protection range output unit, 56 image acquisition unit, 57 point group generation unit, 58 model generation unit, 59 model correction unit, 71 shooting range, 75 endpoint, 81 lightning protection range, 83 unprotected area.

Claims (9)

a shape acquisition unit that acquires a three-dimensional shape of the current state of the target site;
a lightning protection equipment acquisition unit that acquires the location information of the lightning protection equipment to be placed on the site and includes the height of the lightning protection equipment;
a protection area generation unit that generates a three-dimensional shape of the area protected from lightning by the lightning protection equipment based on the arrangement information of the lightning protection equipment and the three-dimensional shape of the current state of the site;
Based on the three-dimensional shape of the protection range and a three-dimensional model including the current three-dimensional shape and three-dimensional positions of a plurality of structures placed on the site, the plurality of structures included in the three-dimensional model a protection range output unit that outputs information indicating whether or not the structure of is within the generated protection range of the lightning protection equipment;
means for adding the lightning protection equipment at any position on the site by the operation of an operator;
including
The protection range output unit updates the three-dimensional shape of the protection range when the lightning protection equipment is added by means for adding the lightning protection equipment at an arbitrary position on the site.
A lightning protection range generation system characterized by: The lightning protection coverage generation system according to claim 1,
The shape acquisition unit acquires a point group that constitutes the surface of the site and the structure generated by surveying, and based on the acquired point group, the current three-dimensional shape of the site and the top of the site. obtaining a 3D model including existing 3D shapes and 3D positions of a plurality of structures located in
Lightning protection range generation system. In the lightning protection coverage generation system according to claim 2,
The shape acquisition unit acquires a plurality of images of the site and the structure photographed from the air, the plurality of images photographed such that photographing ranges overlap with each other, and the acquired plural images Calculate a point group that constitutes the surface of the site and the structure by a multi-viewpoint image measurement method based on, and based on the calculated point group, the three-dimensional shape of the current state of the site and the current state of the plurality of structures obtain a 3D model of
Lightning protection range generation system. In the lightning protection coverage generation system according to claim 3,
The shape acquisition unit obtains a three-dimensional shape of a part of the plurality of structures, which is a three-dimensional shape calculated using a stereoplotter based on the plurality of images. update the 3D model of the structure,
Lightning protection range generation system. The lightning protection coverage generation system according to claim 1,
The shape acquisition unit acquires a point group that constitutes the surface of the site generated by surveying, acquires a three-dimensional shape of the current state of the site based on the acquired point group, and acquires the plurality of structures. Acquiring information indicating the current three-dimensional shape of the structure and the layout of the structure on the site as a three-dimensional model of the current structure ;
Lightning protection range generation system. In the lightning protection range generation system according to any one of claims 1 to 5,
The protection range generation unit generates a three-dimensional shape of the protection range from lightning by the plurality of lightning protection equipment according to the protection level of the structure to be protected from lightning by the rotating sphere method or the protection angle method. ,
The protection range output unit is based on the three-dimensional shape of the plurality of protection ranges and a three-dimensional model including the current three-dimensional shape and three-dimensional position of the plurality of structures placed on the site, outputting information indicating whether the plurality of structures are within the protection range corresponding to the protection level associated with the structures;
Lightning protection range generation system. In the lightning protection range generation system according to any one of claims 1 to 6,
The protection range output unit is included in the three-dimensional model based on the generated three-dimensional shape of the protection range and the three-dimensional shapes and three-dimensional positions of the plurality of structures included in the three-dimensional model. extracting an area that is not included in the generated protection range of the lightning protection equipment from among the plurality of structures that are installed, and outputting the extracted area;
Lightning protection range generation system. In the lightning protection range generation system according to any one of claims 1 to 6,
The protection range output unit displays a plurality of structures included in the three-dimensional model in three dimensions, and displays the generated three-dimensional shape of the protection range and the three-dimensional shape of the plurality of structures included in the three-dimensional model. Based on the dimensional shape and the 3D position, among the regions of the plurality of structures included in the 3D model, a region that is not included in the generated protection range of the lightning protection equipment is different from other regions. display with
Lightning protection range generation system. A shape acquisition unit that acquires the three-dimensional shape of the target site,
A lightning protection equipment acquisition unit for acquiring location information of lightning protection equipment arranged on the site, the location information including the height of the lightning protection equipment;
a protection area generation unit that generates a three-dimensional shape of a protected area from lightning by the lightning protection equipment based on the arrangement information of the lightning protection equipment and the three-dimensional shape of the current site condition ;
Based on the three-dimensional shape of the protection range and a three-dimensional model including the current three-dimensional shape and three-dimensional positions of a plurality of structures placed on the site, the plurality of structures included in the three-dimensional model a protection range output unit that outputs information indicating whether the structure of is within the generated protection range of the lightning protection equipment;
means for adding the lightning protection equipment at any position on the site by operator's operation;
A program for making a computer function as
The protection range output unit updates the three-dimensional shape of the protection range when the lightning protection equipment is added by means for adding the lightning protection equipment at an arbitrary position on the site.
A program characterized by

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