JP2024024519A - Estimation device, estimation method, and control program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an estimation device, an estimation method and a control program which can easily and accurately estimate a volume of a dam.

SOLUTION: An estimation device includes: an acquisition part for acquiring numerical altitude data indicating an altitude of a ground surface where a dam is installed, and three-dimensional above-ground part model data corresponding to an above-ground part projecting from the ground surface in the dam; a virtual altitude data generation part for generating virtual altitude data which is obtained by lowering the altitude by a value based on an embedment depth of an embedment part buried in the ground in the dam from the ground surface and indicates the altitude of a virtual ground surface, on the basis of the numerical altitude data; a dam model generation part for generating a three-dimensional dam model which includes a three-dimensional ground part model corresponding to three-dimensional ground part model data and has a virtual ground surface as a lower surface, on the basis of the virtual altitude data; an estimation part for estimating the volume of the generated three-dimensional dam model; and an output part for outputting information on the estimated volume.

SELECTED DRAWING: Figure 1

COPYRIGHT: (C)2024,JPO&INPIT

Description

The present invention relates to an estimation device, an estimation method, and a control program.

BACKGROUND ART Sabo dams that catch harmful sediment flowing from upstream areas such as debris flows, and dams such as conservation dams that prevent riverbeds and riverbanks from being eroded are known.

For example, Patent Document 1 discloses an erosion control system that includes a pair of non-overflow parts that prevent debris flows flowing from the upstream side from overflowing, and a permeable part that allows debris flows to pass through between the non-overflow parts. A dam is listed.

Japanese Patent Application Publication No. 2014-173232

In the planning stage before constructing a dam, it is required to easily and accurately estimate the volume of a dam.

An object of the present invention is to provide an estimation device, an estimation method, and a control program that can easily and accurately estimate the volume of a dam.

An estimation device according to one aspect of the present invention includes digital elevation data indicating the elevation of the ground surface on which the dam is installed, and three-dimensional above-ground part model data corresponding to the above-ground part of the dam that protrudes above the ground surface. A virtual elevation that indicates the elevation of the virtual ground surface, which is lowered from the ground surface by a value based on the penetration depth of the embedded part of the dam to be buried underground, based on the acquisition part to be obtained and the digital elevation data. A virtual elevation data generation unit that generates data, and a 3D dam model that includes a 3D ground part model corresponding to the 3D ground part model data and whose bottom surface is the virtual ground surface based on the virtual elevation data. The present invention is characterized in that it includes a dam model generating section for estimating the volume of the generated three-dimensional dam model, an estimating section for estimating the volume of the generated three-dimensional dam model, and an output section for outputting information regarding the estimated volume.

In the estimation device according to one aspect of the present invention, the dam model generation unit is based on the penetration depth of the penetration portion of the dam that penetrates into the ground in the width direction with respect to the end in the width direction of the three-dimensional above ground model. It is preferable to generate the three-dimensional dam model so that the cut plane is a plane that extends downward in the vertical direction from a position outward by the value.

In the estimation device according to one aspect of the present invention, the dam model generation unit generates a three-dimensional stretched model by stretching the three-dimensional above-ground model in the width direction and downward, based on the three-dimensional above-ground model data; It is preferable to generate a three-dimensional dam model by cutting the three-dimensional stretched model at a virtual ground surface and a cut plane.

In the estimation device according to one aspect of the present invention, the virtual elevation data generation unit is configured to generate an average value, a median value, and a maximum value of penetration depths at a plurality of positions along the width direction of the three-dimensional above-ground model of the penetration portion. Alternatively, it is preferable to generate virtual elevation data using the minimum value as a value based on the embedment depth.

In the estimation device according to one aspect of the present invention, the dam model generation unit calculates the average value, median value, maximum value, or minimum value of the penetration depth at a plurality of positions along the flow direction of the penetration part based on the penetration depth. As a value, it is preferable to generate a three-dimensional dam model.

In the estimation device according to one aspect of the present invention, the dam is preferably an erosion control dam or a conservation dam.

The estimation method according to one aspect of the present invention uses digital elevation data indicating the elevation of the ground surface where the dam is installed and a three-dimensional above-ground part model corresponding to the above-ground part of the dam that protrudes above the ground surface. A virtual elevation that indicates the elevation of a virtual ground surface that has been lowered from the ground surface by a value based on the penetration depth of the embedded part of the dam to be buried underground, based on the digital elevation data. data, and based on the virtual elevation data, generate a 3D dam model that includes a 3D ground part model corresponding to the 3D ground part model data and has the virtual ground surface as the bottom surface, and It is characterized by estimating the volume of the dam model and outputting information regarding the estimated volume.

A control program according to one aspect of the present invention is a control program for a computer having an output section, and includes digital elevation data indicating the elevation of the ground surface on which the dam is installed, and the ground surface of the dam that protrudes from the ground surface. Based on the digital elevation data, the elevation was lowered from the ground surface by a value based on the penetration depth of the embedded part of the dam to be buried underground. A three-dimensional dam that generates virtual elevation data indicating the elevation of a virtual ground surface, includes a three-dimensional ground part model corresponding to three-dimensional ground part model data based on the virtual elevation data, and has the virtual ground surface as the bottom surface. The present invention is characterized by causing a computer to generate a model, estimate the volume of the generated three-dimensional dam model, and output information regarding the estimated volume from an output unit.

According to the present invention, the estimation device, the estimation method, and the control program can easily and accurately estimate the volume of a dam.

FIG. 1 is a diagram illustrating an example of a schematic configuration of an estimation device. It is a flowchart which shows an example of estimation processing. FIG. 2 is a schematic diagram showing digital elevation data and a three-dimensional above-ground model. (a) shows a three-dimensional above-ground model seen from the downstream side of the valley, and (b) shows a three-dimensional above-ground model seen from the width direction. FIG. 2 is a schematic diagram showing a three-dimensional stretched model. (a) shows a three-dimensional stretched model seen from the downstream side of the valley, and (b) shows a three-dimensional stretched model seen from the width direction. (a) shows a three-dimensional stretched model including a virtual ground plane seen from the downstream side of the valley, and (b) shows a three-dimensional stretched model including a virtual ground plane seen from the width direction. (a) and (b) are schematic diagrams for explaining the process of setting a cutting plane of a three-dimensional dam model. (a) shows a three-dimensional dam model seen from the downstream side of the valley, and (b) shows a three-dimensional dam model seen from the width direction. (a), (b), and (c) are schematic diagrams for explaining the effects of the estimation device.

Hereinafter, various embodiments of the present invention will be described with reference to the drawings. It should be noted that the technical scope of the present invention is not limited to these embodiments, but extends to the invention described in the claims and equivalents thereof.

FIG. 1 is a diagram showing an example of a schematic configuration of an estimation device 1. As shown in FIG. The estimation device 1 is an example of a computer, and estimates the volume of a dam by inputting digital elevation data and three-dimensional above-ground model data, which will be described later, and outputs information regarding the estimated volume of the dam. . For example, in the planning stage before constructing a dam, the estimating device 1 estimates the volume of the dam in order for the dam builder to estimate the maintenance cost necessary for constructing the dam. By estimating the volume of the dam, the builder can estimate the maintenance cost based on the volume estimated at the planning stage and the cost per unit volume based on the maintenance costs of past dam construction. . The dam is an erosion control dam or a conservation dam.

The estimation device 1 includes a storage section 11, a communication section 12, a display section 13, an operation section 14, and a processing section 15. The storage unit 11 stores programs or data. The storage unit 11 includes, for example, a semiconductor memory device. The storage unit 11 stores operating system programs, driver programs, application programs, data, etc. used in processing by the processing unit 15. The program is stored in a computer-readable, non-temporary, portable storage medium such as a CD (Compact Disc)-ROM (Read Only Memory) or a DVD (Digital Versatile Disc)-ROM using a known setup program or the like. Installed on 11.

The communication unit 12 is an example of an output unit. The communication unit 12 enables the estimation device 1 to communicate with other devices. The communication unit 12 includes a communication interface circuit. The communication interface circuit included in the communication unit 12 is a communication interface circuit such as a wired LAN (Local Area Network) or a wireless LAN. The communication unit 12 receives data from another device and supplies it to the processing unit 15, and also transmits the data supplied from the processing unit 15 to the other device.

The display section 13 is an example of an output section. The display unit 13 displays images. The display unit 13 includes, for example, a liquid crystal display or an organic EL (Electro-Luminescence) display. The display unit 13 displays images based on display data supplied from the processing unit 15.

The operation unit 14 receives a user's input operation on the estimation device 1 . The operation unit 14 includes, for example, a keypad, a keyboard, or a mouse. The operation unit 14 may include a touch panel integrated with the display unit 13. The operation unit 14 generates a signal according to the user's input operation and supplies it to the processing unit 15.

The processing unit 15 is a device that centrally controls the operation of the estimation device 1, and includes one or more processors and their peripheral circuits. The processing unit 15 includes, for example, a CPU (Central Processing Unit). The processing unit 15 may include a GPU (Graphics Processing Unit), a DSP (Digital Signal Processor), an LSI (Large Scale Integration), an ASIC (Application Specific Integrated Circuit), an FPGA (Field Programmable Gate Array), and the like. The processing unit 15 controls the operation of each component so that various processes of the estimation device 1 are executed in appropriate procedures based on the program stored in the storage unit 11 and inputs from the communication unit 12 and the operation unit 14. It also controls and executes various processes.

The processing unit 15 includes an acquisition unit 151, a dam model generation unit 152, a virtual elevation data generation unit 153, an estimation unit 154, and an output control unit 155 as functional blocks. Each of these units is a functional module realized by a program executed by the processing unit 15. Each of these parts may be implemented in the estimation device 1 as firmware.

FIG. 2 is a flowchart illustrating an example of estimation processing. The estimation process is mainly executed by the processing unit 15 in cooperation with each element of the estimation device 1 based on a program stored in the storage unit 11 in advance.

First, the acquisition unit 151 acquires digital elevation data and three-dimensional ground model data (step S101). Each piece of data is stored in advance in the storage unit 11, and the acquisition unit 151 acquires each piece of data stored in advance by reading it from the storage unit 11. The acquisition unit 151 may acquire each data by receiving each data from an external information processing device via the communication unit 12.

The digital elevation data is mesh data of the ground surface generated based on height data measured by a surveying method such as aerial laser surveying or photogrammetry. The digital elevation data indicates the elevation of the ground surface in each section (mesh) within a two-dimensional plane along the horizontal plane. Digital elevation data is generated by removing artificial structures such as buildings and bridges, as well as vegetation such as trees, from the measured height data, and interpolating elevation values at predetermined intervals in the north-south and east-west directions. Ru. Digital elevation data is also called a digital elevation model (DEM). Digital elevation data is generated by an external information processing device. The digital elevation data may be generated by the estimation device 1.

The three-dimensional above-ground part model data is numerical data representing a three-dimensional above-ground part model corresponding to the above-ground part of the dam that protrudes from the ground surface. For example, the 3D above-ground model is a 3D solid model that is generated in the planning stage using known 3D drafting software installed in the estimation device 1 in response to input operations on the operation unit 14 by the constructor. be. That is, the 3D ground part model includes a plurality of vertex data, edge line data, surface data, attribute information of the 3D ground part model, etc., and also has a volume (full of contents) 3D structure of the ground part. It shows. The three-dimensional ground model may be generated in an external information processing device in the planning stage using known three-dimensional drafting software installed in the external information processing device. The three-dimensional ground model may be a three-dimensional surface model that includes only a plurality of vertex data, edge data, and surface data.

Generally, the data capacity of three-dimensional above-ground part model data that corresponds only to the above-ground part is smaller than the data capacity of three-dimensional dam model data that includes the above-ground part and the embedded part to be buried underground. Therefore, the estimation device 1 can reduce the amount of data to be processed. Furthermore, since the volume of data to be processed is small, the estimation device 1 can shorten the time required to estimate the volume of the dam.

In addition, when generating a three-dimensional dam model that includes an above-ground part and an embedding part at the planning stage, the shape of the above-ground part can be easily designed, but the shape of the embedding part must be designed in detail according to the ground surface. Therefore, it takes time to generate a three-dimensional dam model. This may increase the amount of time it takes to estimate the volume of the dam. On the other hand, when the estimation device 1 generates a three-dimensional above-ground part model in the planning stage, it compares the case where a three-dimensional dam model including the above-ground part and the embedding part is generated by designing only the shape of the above-ground part. As a result, the time required to generate a three-dimensional ground model can be shortened. As a result, the estimation device 1 can shorten the time required to estimate the volume of the dam.

FIG. 3 is a schematic diagram showing digital elevation data and three-dimensional above-ground model data. FIG. 3 shows three-dimensional drafting data 300 including a ground surface 301 corresponding to digital elevation data and a three-dimensional above-ground model 302 corresponding to three-dimensional above-ground model data. The three-dimensional drafting data 300 is three-dimensional CAD data having a data format of known three-dimensional drafting software. The three-dimensional drafting data 300 includes a plurality of vertex data, edge line data, surface data, etc. corresponding to the three-dimensional ground model data. Furthermore, the three-dimensional drawing data 300 includes the elevation value of each mesh included in the mesh data of the ground surface 301.

As shown in FIG. 3, the ground surface 301 includes a mountain surface 303 and a valley surface 304. Mountain surface 303 corresponds to a mountain in a predetermined area where a dam is installed. Valley surface 304 corresponds to a valley in a predetermined area where a dam is installed. The boundary between the mountain surface 303 and the valley surface 304 is set, for example, by calculating the difference in elevation values between adjacent meshes in the three-dimensional drawing data 300, and between the meshes for which the difference value is greater than or equal to a predetermined threshold. Ru. The three-dimensional above-ground model 302 is installed on the three-dimensional drawing data 300 in response to an input operation on the operating unit 14 by the builder so as to close the valley between the peaks.

Below, the width of the 3D above ground model 302 is defined as the longitudinal direction (X direction in FIG. 3) of the 3D above ground model 302, that is, the direction in which the 3D above ground model 302 extends from one mountain to the other. Sometimes referred to as direction. The width direction is perpendicular to the height direction of the three-dimensional above-ground model 302 (Y direction in FIG. 3) and the direction from the upstream side to the downstream side of the valley (Z direction in FIG. 3). In the following embodiments, the width direction of the three-dimensional above-ground model 302 is simply referred to as the width direction, and the height direction of the three-dimensional above-ground model 302 is simply referred to as the height direction, which is a direction from the upstream side of the valley to the downstream side. is sometimes referred to as the flow direction.

4(a) shows the three-dimensional above-ground model 302 shown in FIG. 3 seen from the downstream side of the valley, and FIG. 4(b) shows the three-dimensional above-ground model 302 shown in FIG. 3 seen from the width direction. As shown in FIGS. 4A and 4B, the three-dimensional above-ground model 302 has an upstream side surface 305, a downstream side surface 306, an upper surface 307, and a lower surface 308. The upstream side surface 305 is a surface facing upstream of the valley. The downstream side surface 306 is a surface facing the downstream side of the valley. The upper surface 307 is a surface when the three-dimensional above-ground model 302 is viewed from above in the vertical direction. The lower surface 308 is a surface extending along the ground surface 301.

Next, the dam model generation unit 152 generates a three-dimensional stretched model by stretching the three-dimensional above-ground model in the width direction and downward, based on the three-dimensional above-ground model data (step S102).

FIG. 5 is a schematic diagram showing a three-dimensional stretched model. FIG. 5 shows three-dimensional drawing data 400 including a three-dimensional stretched model 309 generated by the dam model generation unit 152 based on the three-dimensional above-ground model 302. The three-dimensional drafting data 400, like the three-dimensional drafting data 300, is three-dimensional CAD data having the data format of known three-dimensional drafting software. The three-dimensional stretched model 309 is a three-dimensional solid model, similar to the three-dimensional ground model 302. As shown in FIG. 5, the dam model generation unit 152 generates a widthwise and three-dimensional above-ground model 302 according to the builder's input operation on the operation unit 14, for the three-dimensional above-ground model 302 shown in FIG. A predetermined process of stretching downward is executed. The dam model generation unit 152 generates a three-dimensional stretched model 309 that extends the three-dimensional above-ground model 302 in the width direction and below the three-dimensional above-ground model 302 by executing a predetermined process. That is, the three-dimensional stretched model 309 includes the three-dimensional above ground model 302.

6(a) shows the three-dimensional stretched model 309 shown in FIG. 5 seen from the downstream side of the valley, and FIG. 6(b) shows the three-dimensional stretched model 309 shown in FIG. 5 seen from the width direction. As shown in FIGS. 6(a) and 6(b), the dam model generation unit 152 is configured to generate a dam model along a plane that is in contact with the lower surface 308 on the upstream side surface 305 and the downstream side surface 306, respectively, downward in the height direction of the lower surface 308, and Stretch outward in the width direction (underground). Thereby, the dam model generation unit 152 generates a three-dimensional stretched model 309. The shape of the three-dimensional stretched model 309 is approximately rectangular when viewed from the flow direction, and approximately trapezoidal when viewed from the width direction.

Next, the virtual elevation data generation unit 153 generates virtual elevation data based on the digital elevation data (step S103). The virtual elevation data indicates the elevation of the virtual ground surface in each section (mesh) within a two-dimensional plane along the horizontal plane. The virtual ground surface is a ground surface obtained by lowering the ground surface on which the dam is installed by a value corresponding to the penetration depth of the part of the dam that is buried underground. The penetration depth is preset by the dam builder. The virtual elevation data generation unit 153 generates virtual elevation data corresponding to the virtual ground surface by lowering the elevation from the ground surface by a value based on the penetration depth of the embedded portion. For example, the virtual elevation data generation unit 153 uses the average value, median value, maximum value, or minimum value of the penetration depth at a plurality of positions along the width direction of the penetration part as a value based on the penetration depth, and Generate elevation data.

FIG. 7(a) shows a three-dimensional stretched model 309 including a virtual ground surface 310 corresponding to virtual elevation data seen from the downstream side of the valley, and FIG. 7(b) shows a three-dimensional stretched model 309 including a virtual ground surface 310 seen from the width direction. Stretched model 309 is shown. FIGS. 7A and 7B show a three-dimensional stretched model 309 generated by the dam model generation unit 152 as well as virtual elevation data generated by the virtual elevation data generation unit 153 based on digital elevation data. A virtual toposurface 310 is shown. The virtual elevation data generation unit 153 sets the elevation of each mesh of the virtual elevation data to a value obtained by subtracting the penetration depth D from the elevation of each corresponding mesh of the digital elevation data. As a result, as shown in FIGS. 7A and 7B, the virtual elevation data generation unit 153 can generate virtual elevation data corresponding to the elevation of each mesh of the virtual elevation data that has reached the set value. can.

Next, the dam model generation unit 152 generates a 3D dam model that includes a 3D above-ground model and shows the entire dam, based on the virtual elevation data (step S104). The dam model generation unit 152 generates a three-dimensional dam model with the virtual ground surface as the bottom surface. In addition, the dam model generation unit 152 generates a dam model from a position outside the end portion of the 3D ground model in the width direction by a value based on the penetration depth of the penetration portion of the dam that penetrates into the ground in the width direction. , a three-dimensional dam model is generated so that the cutting plane is a plane extending vertically downward. The penetration depth is preset by the dam builder. The dam model generating unit 152 generates a 3-dimensional dam model by cutting the generated 3-dimensional stretched model at the virtual ground surface and the above-mentioned cutting plane. For example, the dam model generation unit 152 generates a three-dimensional dam model by using the average value, median value, maximum value, or minimum value of penetration depths at a plurality of positions along the flow direction of the penetration part as values based on the penetration depth. generate.

FIGS. 8A and 8B are schematic diagrams for explaining the process of setting the cutting plane of the three-dimensional dam model. As shown in FIGS. 8A and 8B, the dam model generation unit 152 sets a cut plane 311. The cutting surface 311 is located from positions P12 and P22 that are located outside by a value based on the penetration depth W of the penetration part in the width direction with respect to the end positions P11 and P21 in the width direction of the three-dimensional above-ground model 302, It extends downward in the height direction. The dam model generation unit 152 cuts the three-dimensional stretched model 309 at the virtual ground plane 310 and the cut plane 311.

For example, the dam model generation unit 152 matches the length of the cut surface 311 in the height direction with the length of a straight line L drawn downward in the height direction from the positions P11 and P21 to the virtual ground surface 310. The dam model generation unit 152 also sets the position of the end of the virtual ground surface 310 in the width direction to a position P13, where the virtual ground surface 310 intersects a plane extending downward in the height direction from the positions P11 and P21. Let it be P23. Furthermore, the dam model generation unit 152 sets the cut surface 312 extending from the lower end positions P14 and P24 toward the positions P13 and P23 in the height direction of the cut surface 311. The dam model generation unit 152 cuts the three-dimensional stretched model 309 at a virtual ground plane 310, a cut plane 311, and a cut plane 312. Thereby, the dam model generation unit 152 can generate a three-dimensional dam model. The three-dimensional dam model is a three-dimensional solid model, similar to the three-dimensional ground model 302 and the three-dimensional stretched model 309.

FIG. 9(a) shows the three-dimensional dam model 313 seen from the downstream side of the valley, and FIG. 9(b) shows the three-dimensional dam model 313 seen from the width direction. FIGS. 9A and 9B show a three-dimensional dam model 313 cut out from the three-dimensional extended model 309 by the dam model generation unit 152.

As shown in FIGS. 9(a) and 9(b), the dam model generation unit 152 generates a dam model 313 that is located inside of positions P11 and P21 in the width direction of the region (space) below the ground surface 301 of the 3D dam model 313. The area is set as a three-dimensional embedded part model 314 corresponding to the embedded part of the dam. In addition, the dam model generation unit 152 generates a 3D penetration part model corresponding to the penetration part of the dam by converting the area outside the positions P11 and P21 of the area (space) below the ground surface 301 of the 3D dam model 313 into a 3D penetration part model corresponding to the penetration part of the dam. 315. The dam model generation unit 152 generates a 3D dam model 313 including a 3D aboveground model 302, a 3D penetration model 314, and a 3D penetration model 315.

Next, the estimation unit 154 estimates the volume of the generated three-dimensional dam model (step S105). For example, the estimating unit 154 sets cubic voxels obtained by dividing the three-dimensional space into three-axis units of the same size. The estimation unit 154 estimates the volume of the three-dimensional dam model from the number of voxels that overlap with the three-dimensional dam model. When estimating the volume of the three-dimensional dam model 313 shown in FIGS. 9(a) and (b), the estimation unit 154 estimates the volume of the three-dimensional above-ground part model 302, the three-dimensional penetration part model 314, and the three-dimensional penetration part model 315, respectively. Calculate the volume of Further, the estimating unit 154 estimates the total volume of the calculated three-dimensional above ground model 302, three-dimensional embedded part model 314, and three-dimensional penetration part model 315 as the volume of the three-dimensional dam model 313.

Finally, the output control unit 155 outputs information regarding the estimated volume (step S106), and ends the series of estimation processes. The output control unit 155 outputs information regarding the volume estimated by the estimation unit 154 by displaying it on the display unit 13. The output control unit 155 may output the information regarding the volume estimated by the estimation unit 154 by transmitting it to an external information processing device via the communication unit 12 . The output control unit 155 outputs, for example, the value of the volume estimated by the estimation unit 154 as information regarding the estimated volume. The output control unit 155 may output the maintenance cost estimated based on the volume estimated by the estimation unit 154 as information regarding the estimated volume. In that case, the estimating device 1 stores in advance in the storage unit 11, for example, a table showing the relationship between the volume of the three-dimensional dam model 313 and the maintenance cost required for construction of the dam. The output control unit 155 refers to the table stored in the storage unit 11 and specifies the maintenance cost corresponding to the volume estimated by the estimation unit 154 as the maintenance cost necessary for constructing the dam.

As described in detail above, the estimation device 1 uses a three-dimensional dam model in which the three-dimensional above-ground model data is increased by an amount corresponding to the penetration depth, thereby easily and easily calculating the volume of the dam. , can be estimated with high accuracy.

FIGS. 10A, 10B, and 10C are schematic diagrams for explaining the effects of the estimation device 1. As shown in FIGS. 10(a), (b), and (c), the three-dimensional dam model 500 includes a three-dimensional above ground model 501, a three-dimensional penetration model 502, and a three-dimensional penetration model 503. It is included. The shape and size of the three-dimensional above-ground model 501 substantially match the three-dimensional above-ground model 302 of the three-dimensional dam model 313 shown in FIGS. 9(a) and 9(b). Further, the shape and size of the three-dimensional penetration part model 502 and three-dimensional penetration part model 503 of the three-dimensional dam model 500 are designed in detail to match the ground surface 504.

As shown in FIG. 10(a), the penetration depth of the actually designed three-dimensional dam model 500 differs depending on the position in the width direction. However, when viewed as a whole, the volume of the three-dimensional penetration part model 502 is calculated assuming that the penetration depth of the entire penetration part is the same as the average penetration depth Dave of the three-dimensional dam model 500. The volume of the three-dimensional embedded part model 314 is approximated. Similarly, as shown in FIG. 10(c), the penetration depth of the actually designed three-dimensional dam model 500 differs depending on the position in the flow direction. However, the volume of the three-dimensional penetration model 503 is the volume of the three-dimensional penetration model 315, which is calculated assuming that the penetration depth of the entire penetration is the same as the average value Wave of the penetration depth of the three-dimensional dam model 500. Approximate it as

In addition, the volume of the three-dimensional embedded part model 502 is calculated based on the assumption that the penetration depth of the entire embedded part is the median value of the embedded depths of the three-dimensional dam model 500. It is also approximated by the volume of . Furthermore, the volume of the three-dimensional penetration model 503 is also approximated by the volume of the three-dimensional penetration model 315, which is calculated assuming that the penetration depth of the entire penetration is the median value of the penetration depth of the three-dimensional dam model 500. do.

Therefore, the estimation device 1 can accurately estimate the volume of the three-dimensional dam model 313 by using the average value or median value of the penetration depth or the penetration depth. That is, the estimation device 1 can easily and accurately estimate the volume of the dam. Thereby, the estimation device 1 can easily and accurately estimate the cost required for constructing a dam without designing the three-dimensional dam model 500.

In addition, the volume of the three-dimensional penetration model 502 is a three-dimensional penetration calculated assuming that the penetration depth of the entire penetration part is the same as the maximum penetration depth Dmax of the three-dimensional dam model 500. The volume of the model 314 is smaller than that of the model 314. In addition, the volume of the three-dimensional embedded part model 502 is a three-dimensional embedded part calculated assuming that the entire embedded depth of the embedded part is the same as the minimum value Dmin of the embedded depth of the three-dimensional dam model 500. The volume of the model 314 is larger than that of the model 314. Furthermore, the volume of the three-dimensional penetration model 503 is also calculated based on the assumption that the penetration depth of the entire penetration is the same as the maximum penetration depth Wmax of the three-dimensional dam model 500. It becomes smaller than the volume. The volume of the three-dimensional penetration model 502 is calculated based on the assumption that the penetration depth of the entire penetration is the same as the minimum value Wmin of the penetration depth of the three-dimensional dam model 500. It becomes larger than the volume.

Therefore, the estimation device 1 can easily estimate the maximum value or minimum value of the volume of the three-dimensional dam model by using the maximum value or minimum value of the embedding depth or the penetration depth. Thereby, the estimating device 1 can easily estimate the maximum cost or minimum cost required for constructing the dam.

In addition, a three-dimensional above-ground model can be designed more easily than a three-dimensional dam model that includes embedded parts and penetration parts that need to be designed in detail according to the ground surface. Therefore, the estimation device 1 can significantly simplify the design work performed by the constructor.

Note that when the 3D above-ground model is a 3D surface model, the dam model generation unit 152 generates a 3D extension that includes only a plurality of vertex data, ridgeline data, and surface data, which is an extension of the surface of the 3D aboveground model. A model may also be generated. Furthermore, the dam model generation unit 152 may generate a three-dimensional dam model that includes only a plurality of vertex data, edge data, and surface data. The estimation unit 154 may estimate the volume of the three-dimensional dam model that includes only a plurality of vertex data, edge data, and surface data using a known volume calculation technique such as the average cross section method.

Furthermore, the dam model generation unit 152 may set the position of the end of the virtual ground surface 310 in the width direction to a position where the virtual ground surface 310 and the cut surface 311 intersect. The dam model generation unit 152 may generate a 3-dimensional dam model by cutting the 3-dimensional stretched model 309 at the virtual ground plane 310 and the cut plane 311.

It should be understood that those skilled in the art can make various changes, substitutions, and modifications thereto without departing from the spirit and scope of the invention. For example, the processing of each part described above may be executed in a different order as appropriate within the scope of the present invention. Furthermore, the embodiments and modifications described above may be implemented in appropriate combinations within the scope of the present invention.

1 Estimation device 151 Acquisition unit 152 Weir model generation unit 153 Virtual elevation data generation unit 154 Estimation unit 155 Output control unit

Claims (8)

an acquisition unit that acquires digital elevation data indicating the elevation of a ground surface on which a dam is installed, and three-dimensional above-ground part model data corresponding to an above-ground part of the dam that protrudes above the ground surface;
Based on the digital elevation data, generate virtual elevation data indicating the elevation of a virtual ground surface, which is lowered from the ground surface by a value based on the penetration depth of the embedded part of the dam to be buried underground. a virtual elevation data generation unit,
a dam model generation unit that generates a 3D dam model including a 3D ground part model corresponding to the 3D ground part model data and whose bottom surface is the virtual ground surface, based on the virtual elevation data;
an estimation unit that estimates the volume of the generated three-dimensional dam model;
an output unit that outputs information regarding the estimated volume;
An estimation device comprising: The dam model generation unit is configured to generate a position outside the end of the three-dimensional ground model in the width direction by a value based on a penetration depth of a penetration portion of the dam that penetrates into the ground in the width direction. The estimation device according to claim 1, wherein the three-dimensional dam model is generated so that a plane extending vertically downward is used as a cutting surface. The dam model generation unit includes:
Generate a three-dimensional stretched model by stretching the three-dimensional above-ground part model in the width direction and downward, based on the three-dimensional above-ground part model data,
The estimating device according to claim 2, wherein the three-dimensional dam model is generated by cutting the generated three-dimensional stretched model at the virtual ground surface and the cutting plane. The virtual elevation data generation unit calculates the average value, median value, maximum value, or minimum value of the penetration depth at a plurality of positions along the width direction of the three-dimensional above-ground model of the penetration part as the penetration depth. The estimating device according to claim 1, wherein the virtual elevation data is generated as a value based on the altitude. The dam model generation unit calculates an average value, median value, maximum value, or minimum value of penetration depths at a plurality of positions along the flow direction of the three-dimensional above-ground model of the penetration part as a value based on the penetration depth. , the estimation device according to claim 2, which generates the three-dimensional dam model. The estimation device according to any one of claims 1 to 5, wherein the dam is an erosion control dam or a conservation dam. By computer,
Obtaining digital elevation data indicating the elevation of the ground surface on which the dam is installed, and three-dimensional above-ground part model data corresponding to the above-ground part of the dam that protrudes above the ground surface,
Based on the digital elevation data, generate virtual elevation data indicating the elevation of a virtual ground surface, which is lowered from the ground surface by a value based on the penetration depth of the embedded part of the dam to be buried underground. death,
Based on the virtual elevation data, generate a three-dimensional dam model that includes a three-dimensional above-ground model corresponding to the three-dimensional above-ground model data and has the virtual ground surface as the bottom surface;
Estimating the volume of the generated three-dimensional dam model,
outputting information regarding the estimated volume;
An estimation method characterized by: A control program for a computer having an output section,
Obtaining digital elevation data indicating the elevation of the ground surface on which the dam is installed, and three-dimensional above-ground part model data corresponding to the above-ground part of the dam that protrudes above the ground surface,
Based on the digital elevation data, generate virtual elevation data indicating the elevation of a virtual ground surface, which is lowered from the ground surface by a value based on the penetration depth of the embedded part of the dam to be buried underground. death,
Based on the virtual elevation data, generate a three-dimensional dam model that includes a three-dimensional above-ground model corresponding to the three-dimensional above-ground model data and has the virtual ground surface as the bottom surface;
Estimating the volume of the generated three-dimensional dam model,
outputting information regarding the estimated volume from the output unit;
A control program that causes the computer to execute the following.

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