Inspection support device, inspection support method, and inspection support program

Abstract

To provide a technique which enables cable tension estimation while reducing a measurement amount of point group data.SOLUTION: An inspection support device, which models a cable from point group data to support inspection, includes a processing unit and a storage unit. The storage unit stores point group data including a plurality of three-dimensional coordinate points. The processing unit performs the processing of: plotting the coordinate points to a three-dimensional space to perform display processing; receiving the designation of a start point, an end point and each intermediate point existing therebetween from among the display-processed coordinate points; determining three reference coordinate points; projecting the reference coordinate points on a plane which passes through the three reference coordinate points to calculate a quadratic curve; determining the center line of the cable; and determining, based on the center line, a three-dimensional model of the cable.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to an inspection support device, an inspection support method, and an inspection support program. [Background technology]

[0002] Conventionally, techniques for measuring, inspecting, and simulating electric wires (cables and wires) using point cloud data have been provided. Techniques for creating a three-dimensional model of an electric wire from point cloud data and estimating tension are proposed in, for example, Patent Documents 1 to 3. Techniques for generating a wire model using point cloud data are proposed in, for example, Patent Document 4. Techniques for measuring the height of a contact wire using point cloud data are proposed in, for example, Patent Document 5. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2020-098126 [Patent Document 2] Japanese Patent Application Laid-Open No. 2017-156179 [Patent Document 3] Japanese Patent Application Laid-Open No. 2015-078849 [Patent Document 4] Japanese Patent Application Publication No. 2019-109839 [Patent Document 5] International Publication No. 2017 / 103999 Summary of the Invention [Problem to be solved by the invention]

[0004] Although a 3D model of an electric wire is generated from point cloud data in order to inspect the tension of the electric wire or inspect and simulate interference between electric wires, such modeling requires the preparation of a sufficient number of point cloud data. On the other hand, the above Patent Documents 1 to 5 do not disclose any technology that contributes to reducing the number of point clouds when modeling an electric wire from point cloud data.

[0005] From another perspective, the technologies disclosed in the above Patent Documents 1 to 5 disclose technologies for identifying electric wires by modeling utility poles, railroad tracks, etc. in addition to point cloud data of electric wires, so in addition to a sufficient number of point clouds for modeling electric wires, it was also necessary to prepare a sufficient number of point clouds of point cloud data for surrounding facilities.

[0006] In view of the above circumstances, an object of the present invention is to provide an inspection support technology that contributes to reducing the number of point clouds when modeling an electric wire from point cloud data. [Means for solving the problem]

[0007] In order to achieve the above object, the present invention provides an inspection support device for modeling an electric wire from point cloud data and supporting inspection, comprising: The inspection support device includes a processing unit and a storage unit, the storage unit stores point cloud data including a plurality of three-dimensional coordinate points; the processing unit plots the coordinate points in a three-dimensional space and performs display processing; Among the coordinate points that have been displayed, the start point, end point, and intermediate points between them are designated, and three reference coordinate points are determined; projecting the reference coordinate points onto a plane passing through the three reference coordinate points to calculate a quadratic curve and determine the center line of the electric wire; A three-dimensional model of the wire is determined based on the centerline.

[0008] The present invention also provides an inspection support method for modeling an electric wire from point cloud data and supporting inspection, comprising: a step in which a measurement device measures point cloud data including a plurality of three-dimensional coordinate points from one or a plurality of measurement points located in a direction in which the electric wire that forms a downward convex arc is visible; a step in which the inspection support device stores the point cloud data; a step of plotting the coordinate points in a three-dimensional space and displaying the plotted points; a step of accepting designation of a start point, an end point, and an intermediate point between the start point and the end point of the electric wire from among the coordinate points that have been displayed, and determining three reference coordinate points; a step of calculating a quadratic curve by projecting the three reference coordinate points onto a plane passing through the three reference coordinate points, and determining a center line of the electric wire; and determining a three-dimensional model of the wire based on the centerline. In a preferred embodiment of the present invention, the measurement point is located at approximately the center in the horizontal direction of the downwardly convex arc.

[0009] The present invention also provides an inspection support program for modeling an electric wire from point cloud data and supporting inspection, comprising: The computer functions as an inspection support device, The inspection support device includes a processing unit and a storage unit, the storage unit stores point cloud data including a plurality of three-dimensional coordinate points; the processing unit plots the coordinate points in a three-dimensional space and performs display processing; Among the coordinate points that have been displayed, the start point, end point, and intermediate points between them are designated, and three reference coordinate points are determined; projecting the reference coordinate points onto a plane passing through the three reference coordinate points to calculate a quadratic curve and determine the center line of the electric wire; A three-dimensional model of the wire is determined based on the centerline.

[0010] With this configuration, it is possible to specify any coordinate point from the point cloud data that has been processed for display, and to model the electric wire based on that coordinate point.

[0011] In a preferred embodiment of the present invention, the storage unit stores, as the point cloud data, measurement points indicating three-dimensional coordinates of points at which the point cloud data is measured, in addition to the coordinate points, The processing unit moves one or more of the specified start point, end point, and intermediate points in a depth direction as viewed from the measurement point, and determines the reference coordinate point.

[0012] In a preferred embodiment of the present invention, the storage unit stores information relating to the diameter of the electric wire, When determining the reference coordinate point, the processing unit sets the reference coordinate point to a point moved by the radius of the electric wire in a direction away from the measurement point on a straight line connecting the measurement point and the starting point, ending point, or intermediate point.

[0013] With this configuration, it is possible to perform offset processing on the point cloud data and correct the coordinates of the electric wires, particularly the center lines.

[0014] In a preferred embodiment of the present invention, the processing unit acquires, for a certain three-dimensional coordinate point through which the center line passes, neighboring coordinate points located in the vicinity of the certain three-dimensional coordinate point from the point cloud data, and performs a calculation for determining a new center line. quadratic curve is determined based on the acquired neighboring coordinate points.

[0015] In a preferred embodiment of the present invention, when acquiring the nearby coordinate points, the processing unit sets a predetermined interval in the extension direction of the center line, projects the coordinate points in the point cloud data included within the interval onto a plane that cuts the center line in a direction perpendicular to or vertical to the center line, and determines whether the coordinate points are located near the center line.

[0016] With this configuration, the coordinates of the center line of the estimated electric wire model can be corrected based on the measured point cloud data. [Effects of the Invention]

[0017] The present invention can provide an inspection support technology that contributes to reducing the number of point clouds when modeling an electric wire from point cloud data. [Brief explanation of the drawings]

[0018] [Figure 1] 1 is a block diagram showing a configuration of an inspection support device according to an embodiment; [Figure 2] 10 shows an example of measuring point cloud data according to an embodiment. [Figure 3] 1 is a process flowchart of inspection support according to an embodiment. [Figure 4] 10 shows an example of an inspection support screen display according to an embodiment. [Figure 5] 10 shows an example of an inspection support screen display according to an embodiment. [Figure 6] FIG. 10 is a conceptual diagram illustrating a case where a coordinate point is moved in a depth direction according to an embodiment. [Figure 7] FIG. 10 is a conceptual diagram illustrating the process of acquiring neighboring coordinate points according to an embodiment. [Figure 8] 10 shows an example of an inspection support screen display according to an embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0019] The present invention will now be described more fully with reference to the accompanying drawings, in which preferred embodiments are shown, but which may be embodied in many different forms and are not limited to the embodiments set forth herein.

[0020] For example, in this embodiment, the configuration, operation, etc. of an inspection support device that executes an inspection support program will be described, but similar effects can be achieved by an executed method, system, computer program (inspection support program), etc. The inspection support program in this embodiment may be stored and provided on a computer-readable non-transitory recording medium, or may be provided so as to be downloadable via a network.

[0021] In this embodiment, the term "unit" may also include, for example, hardware resources implemented by a broadly defined circuit and software information processing that can be specifically realized by these hardware resources. In this embodiment, "information" is represented by, for example, physical signal values ​​representing voltage or current, high or low signal values ​​as a binary bit set consisting of 0 or 1, or quantum superposition (so-called quantum bits), and communication and calculations can be performed on the broadly defined circuit. A broadly defined circuit is a circuit realized by appropriately combining a circuit, circuitry, processor, memory, etc., including a central processing unit (CPU), a graphics processing unit (GPU), a large-scale integration (LSI), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), etc.

[0022] <Inspection support device 1> 1 is a block diagram showing the configuration of an inspection support device according to one embodiment. As shown in FIG. 1, the inspection support device 1 includes, as its hardware configuration, a processing unit 11, a storage unit 12, a communication unit 13, an input unit 14, and an output unit 15.

[0023] The processing unit 11 includes one or more processors such as a CPU, and controls the overall operation and processing of the inspection support device 1 by executing the inspection support program according to the present invention, an OS, browser software, and other applications.

[0024] The storage unit 12 is an HDD, a ROM, a RAM, or the like, and stores the inspection support program according to the present invention and data used when the processing unit 11 executes processing based on the program. The processing unit 11 executes processing based on the inspection support program stored in the storage unit 12, thereby realizing the functional configuration described below.

[0025] The communication unit 13 controls communication with the communication network, and performs inputs required to operate the inspection support device 1 and outputs related to the operation results.

[0026] The input unit 14 is a touch panel, a mouse, a keyboard, or the like, and inputs operation requests from the user to the processing unit 11. The output unit 15 is a display, or the like, and displays the results of processing by the processing unit 11, or the like.

[0027] The inspection support device 1 includes, as functional components, a display processing means 101, a designation means 102, a shape determination means 103, an evaluation means 104, and a database DB. These functional components are realized by the hardware (processing unit 11, etc.) of the inspection support device 1 executing software (an inspection support program).

[0028] It is possible to use a general-purpose server computer, a personal computer, or the like as the inspection support device 1. It is also possible to use multiple computers to provide the functional components of the inspection support device 1. To realize the functions on a client terminal, a server that executes an inspection support program may be used as the inspection support device (a so-called server-client system).

[0029] The display processing means 101 processes the display of the inspection support screen and transmits the display processing result to the output unit 15. The inspection support screen is configured to be able to accept input via the input unit 14, and the designation means 102 accepts operation input via the inspection support screen, such as designation of parameters for modeling the electric wire, designation of coordinate points, and designation of parameters for simulation using the electric wire model.

[0030] The shape determination means 103 determines the model shape of the electric wire based on the coordinate points designated by the user and the first parameter as a fixed value.

[0031] The evaluation means 104 estimates the tension of the electric wire based on the model shape determined by the shape determination means 103. Furthermore, the evaluation means 104 determines a movable area of ​​the electric wire model 1300 based on the model shape determined by the shape determination means 103 and the second parameter as a variable value. "Determining a movable area of ​​the electric wire model 1300" refers to simulating a spatial area that the thin wire structure, such as an electric wire, represented by the electric wire model 1300 can take (can exist) when the shape and distribution of the thin wire structure change due to slackening or the like.

[0032] <Point cloud data 1000> Point cloud data is a group of three-dimensional coordinates measured using a three-dimensional measuring instrument (measuring device) using the method shown in Figure 2, and is associated with measurement points (measurement origins), which are the coordinates of the locations where the measurements were taken. The three-dimensional measuring instrument SC is a three-dimensional laser scanner or the like that can measure point cloud data.

[0033] 2(a) is a diagram showing the positional relationship between the electric wire CA, which is the measurement target, and the three-dimensional measuring device SC. Reference symbol ST denotes a support (for example, an overhead line pole, utility pole, steel tower, etc.) that supports the electric wire CA.

[0034] The point cloud data 1000 may be a point cloud measured at one or more positions including at least the start point SP and end point EP where the electric wire CA is supported by the support ST and the measurement points MP that form an obtuse triangle when viewed from above, as shown in Fig. 2(b). Alternatively, the point cloud data 1000 may be a point cloud measured at three or more positions including a first measurement point MP1 approximately corresponding to the start point of the electric wire CA, a second measurement point MP2 approximately corresponding to an intermediate point between the start point and the end point, and a third measurement point MP3 approximately corresponding to the end point when viewed from above and parallel to the electric wire CA, as shown in Fig. 2(c). The point cloud data measured at each position is associated with the respective measurement points (measurement origins).

[0035] <First parameter 1100> The first parameter 1100 indicates a known physical quantity (fixed value) specific to the electric wire to be inspected, etc. The fixed value is, for example, a design parameter that is uniquely determined at the stage of designing the electric wire, and is, for example, one or more of the unit weight, cross-sectional area, elastic coefficient, linear expansion coefficient, etc. of the electric wire for which the electric wire model 1300 is created, and there is no limitation on the type of design parameter as long as it indicates the characteristics of the electric wire. The diameter (radius) of the electric wire may be registered as the first parameter.

[0036] <Second parameter 1200> The second parameter 1200 indicates, for example, a range of a physical quantity corresponding to an external factor in the electric wire model 1300. In the description in this specification, the "external factor" refers, for example, to an environmental factor, such as temperature (air temperature), wind force, tension, or ice coverage indicating the degree of snow accumulation on the electric wire model 1300, which are applied as external forces to the electric wire (electric wire model 1300). Based on the ranges of these second parameters, the evaluation means 104 simulates the movable range of the electric wire model 1300.

[0037] Furthermore, the parameters constituting the second parameters 1200 according to one embodiment of the present invention may be, for example, an external force generated when a moving body such as a bird or animal applies its weight in the direction of gravity to a thin-line structure such as an electric wire represented by the electric wire model 1300. Also, for example, the parameters may be an external force applied to a thin-line structure such as an electric wire represented by the electric wire model 1300 due to vibrations such as an earthquake.

[0038] <Electric Wire Model 1300> The database DB stores the electric wire model 1300 determined by the shape determination means 103. The electric wire model 1300 is, for example, a set of three-dimensional coordinates through which the center line of the electric wire model passes, the diameter (radius) of the electric wire, etc. The diameter (radius) may refer to a value registered in the database DB as the first parameter 1100.

[0039] <Inspection support method> Next, an inspection support method according to one embodiment of the present invention will be described with reference to Figures 3 to 8. Figure 3 is a processing flowchart of the inspection support. First, the display processing means 101 plots coordinate points in a three-dimensional space to display an inspection support screen, and transmits the display processing result to the output unit 15. This allows the user to display the inspection support screen.

[0040] 4 is a screen display example of the inspection support screen. The display processing means 101 displays the inspection support screen as shown in the example by plotting the point cloud data 1000 on a three-dimensional coordinate system, and transmits the display processing results to the output unit 15. The coordinate system of the point cloud data or the coordinates imported into the inspection support device 1 is a three-dimensional Cartesian coordinate system in which the direction of gravity is the Z axis and the XY plane is perpendicular to that axis.

[0041] In step S301 (hereinafter simply referred to as S301), the designation means 102 accepts input of coordinate points for modeling the electric wire. In this embodiment, the designation means 102 accepts designation of a (tentative) start point, end point, and intermediate point between them from among the coordinate points that have been displayed. FIG. 5 is an example of a screen display of an inspection support screen. As shown in FIG. 5, the user designates three desired coordinate points to be considered as the start point, end point, and intermediate point from the point cloud plotted on the inspection support screen via the input unit 14. Note that these coordinate points are arbitrarily designated by the user, and do not necessarily need to be coordinate points that strictly mean the start point or end point of the electric wire. Similarly, the intermediate point may be a coordinate point between the start point and end point, and does not necessarily need to be located exactly halfway between them.

[0042] In S302, the designation unit 102 receives a designation of the standard of the electric wire. The received standard is stored in the database DB as a first parameter 1100. In this embodiment, the diameter or radius of the electric wire is stored as the first parameter 1100 via the designation unit 102.

[0043] In S303, the shape determination means 103 moves one or more of the specified start point, end point, and intermediate point in the depth direction as seen from the measurement point to determine the reference coordinate point. In S303, when determining the reference coordinate point, a point obtained by moving the measurement point and the straight line connecting the start point, end point, or intermediate point specified in S301 by the radius of the electric wire in the direction away from the measurement point is set as the reference coordinate point.

[0044] Figure 6 is a conceptual diagram of how a coordinate point is moved in the depth direction. Point P' is determined by moving the selected coordinate point P by a radius RA along the line connecting the selected coordinate point P and the measurement point MP of the point cloud data that includes coordinate point P. The point cloud data measured by the laser scanner indicates the coordinates of the outside of the electric wire CA, and in order to offset these to the coordinates of the center line of the electric wire, the coordinate point is moved in the depth direction.

[0045] In S304, the shape determination means 103 creates a two-dimensional plane with the Z-axis direction of the global coordinate system as the Y-axis. Then, in S305, the reference coordinate points determined in S303 are projected onto the two-dimensional plane created in S304. Furthermore, in S306, a quadratic curve is calculated from three points on the two-dimensional plane. As a result, the shape determination means 103 projects the reference coordinate points onto the two-dimensional plane that passes through the three reference coordinate points and calculates the quadratic curve.

[0046] In S307, the shape determination means 103 acquires a point group around the created quadratic curve, and in S308, the quadratic curve is modified so as to best fit the acquired point group. The shape determination means 103 acquires, from the point group data, neighboring coordinate points located near the coordinate points through which the center line of the provisional electric wire model passes when the determined quadratic curve is inversely projected onto a three-dimensional space. Then, based on these neighboring coordinate points, a new center line of the electric wire is determined. quadratic curve The neighboring coordinate points may be offset coordinates, similar to S303.

[0047] FIG. 7 is a conceptual diagram of how to acquire nearby coordinate points. As shown in FIG. 7(a), when acquiring nearby coordinate points, the shape determination means 103 sets a predetermined interval A in the extension direction of the electric wire CA indicated by the virtual center line CL, and projects coordinate points in the point cloud data included within the interval A onto a plane that cuts the electric wire CA indicated by the center line CL in the perpendicular or vertical direction (the illustrated example shows the perpendicular direction). FIG. 7(b) shows the projected plane, and determines whether the coordinate points are located near the virtual center line. Here, for example, coordinate points that are located at a distance of RI (<radius RA) or more from the center line CL and within RO (>radius RA) are considered to be nearby coordinate points.

[0048] The center line coordinates are optimized by moving the center line (point) CL by finding, for example, the least square distance between these nearby coordinate points and the curve drawn by RI (the cross-sectional shape of the electric wire). Alternatively, these nearby coordinate points may be projected onto a two-dimensional plane (the plane on which the above-mentioned quadratic curve is drawn) containing the virtual center line CL, and the true (more optimal) center line CL may be calculated by finding the least square distance, etc.

[0049] In S309, the shape determination means 103 determines a three-dimensional model of the electric wire based on the determined (true) center line of the electric wire, and models / determines the shape of the electric wire model 1300. The shape determination means 103 stores the determined electric wire model 1300 in the database DB.

[0050] <Adjusting the start and / or end points> After the shape determination means 103 determines the (true) center line of the electric wire, the display processing means 101 processes and displays the electric wire model 1300 or its center line together with the point cloud data, and transmits the display processing result to the output unit 15. FIG. 8 is an example of a screen display of an inspection support screen, showing an example of a screen display when the electric wire model 1300 is displayed together with the point cloud data on the inspection support screen. Here, the user may operate the input unit 14 to select coordinates on the point cloud or the center line, and the designation means 102 may accept designation of the selected coordinates on the point cloud or the center line as the (true) start point or end point. Upon accepting the designation of the start point and / or end point, the designation means 102 may update the coordinate values ​​of the start point and / or end point in the electric wire model 1300. This allows the start end and / or end end of the center line to be extended or contracted.

[0051] <Calculating tension> The evaluation means 104 estimates the tension of the electric wire based on the model shape of the electric wire determined by the shape determination means 103. When the database DB stores the unit weight of the electric wire as the first parameter 1100, the evaluation means 104 calculates the tension of the electric wire based on the quadratic coefficient of the quadratic curve model of the center line and the unit weight. Furthermore, the evaluation means 104 may calculate the tension etc. using other first parameters 1100, or may calculate a value other than tension.

[0052] <Estimation of the movable area> The evaluation means 104 determines the movable area of ​​the electric wire model 1300 based on the shape determined by the shape determination means 103 and the second parameter 1200 as a variable value (range).

[0053] The evaluation means 104 defines an X-axis parallel to the plane formed by the center line and newly defines a projection plane YZ consisting of Y-axis and Z-axis directions perpendicular to the X-axis. Multiple projection planes YZ may be defined at any interval between the start point and the end point of the center line. The evaluation means 104 projects the electric wire model 1300 onto the projection plane YZ and determines the movable area of ​​the two-dimensional shape. At this time, the evaluation means 104 applies energy to the electric wire based on the second parameter 1200 and records the trajectory of the electric wire on the projection plane YZ. The movable area of ​​the two-dimensional shape is determined based on this trajectory. If a new adjacent projection plane YZ can be defined in the X-axis direction, the process proceeds to defining the next projection plane YZ. If a new adjacent projection plane YZ cannot be defined, the evaluation means 104 combines the movable areas of each projection plane YZ to determine the movable area of ​​the three-dimensional shape.

[0054] Here, when two electric wires are close to each other (for example, when they are arranged vertically as shown in Figure 2(a)), the interference between the two electric wires can be simulated by determining the three-dimensional movable area for each of the two wires and combining them.

[0055] In the description of this specification, "electric wire" refers to a known or conventional electric wire, and refers to a thin wire structure including an overhead line, telephone line, electric train line, communication line, antenna line, contact line and overhead line, overhead ground wire, overhead electric wire, etc. [Explanation of symbols]

[0056] 1: Inspection support device 11: Processing section 12: Storage section 13: Communications Department 14: Input section 15: Output section 101: Display processing means 102: Specifying means 103: Shape determining means 104: Evaluation methods 1000: Point cloud data 1100: First parameter 1200: Second parameter 1300: Electrical Wire Model CA: Electric wire ST:Support SC: 3D measuring instrument SP:Start point EP: End Point MP: Measurement point MP1: First measurement point MP2: Second measurement point MP3: The third measurement point P: Coordinate point RA: radius CL: Center line

Claims

1. An inspection support device for modeling an electric wire from point cloud data and supporting inspection, The inspection support device includes a processing unit and a storage unit, the storage unit stores point cloud data including a plurality of three-dimensional coordinate points and three-dimensional measurement points indicating measurement points of the coordinate points; the processing unit plots the coordinate points in a three-dimensional space and performs display processing; Accepting designation of the start point, end point, and intermediate points between them from among the coordinate points that have been displayed, and moving one or more of the designated start point, end point, and intermediate points in a direction toward the back as viewed from the measurement point to determine three reference coordinate points; projecting the three reference coordinate points onto a plane passing through the three reference coordinate points to calculate a quadratic curve, thereby determining a center line of the electric wire; determining a three-dimensional model of the wire based on the centerline; Inspection support device.

2. the storage unit stores information relating to the diameter of the electric wire; When determining the reference coordinate point, the processing unit determines a point obtained by moving the measurement point and the line connecting the start point, the end point, or the intermediate point by a radius of the electric wire in a direction away from the measurement point as the reference coordinate point. The inspection support device according to claim 1.

3. the processing unit acquires, for a certain three-dimensional coordinate point through which the center line passes, a neighboring coordinate point located in the vicinity of the certain three-dimensional coordinate point from the point cloud data; determining a quadratic curve for determining a new center line based on the obtained neighboring coordinate points; The inspection support device according to claim 1 or 2.

4. When acquiring the nearby coordinate points, the processing unit sets a predetermined interval in the extension direction of the center line, projects coordinate points in the point cloud data included within the interval onto a plane that cuts the center line in a direction perpendicular to or perpendicular to the center line, and determines whether the coordinate points are located near the center line. The inspection support device according to claim 3.

5. An inspection support method for modeling an electric wire from point cloud data and supporting inspection, comprising: a step in which a measurement device measures point cloud data including a plurality of three-dimensional coordinate points from one or a plurality of measurement points located in a direction in which the electric wire that forms a downward convex arc is visible; a step in which the inspection support device stores the point cloud data; a step of plotting the coordinate points in a three-dimensional space and displaying the plotted points; a step of accepting designation of a start point, an end point, and intermediate points between them of the electric wire from among the coordinate points that have been displayed, and moving one or more of the designated start point, end point, and intermediate points in a depth direction as viewed from the measurement point to determine three reference coordinate points; a step of calculating a quadratic curve by projecting the three reference coordinate points onto a plane passing through the three reference coordinate points, and determining a center line of the electric wire; and determining a three-dimensional model of the wire based on the centerline. Inspection support methods.

6. The measurement point corresponds to a horizontal center of the downwardly convex arc. The inspection support method according to claim 5 .

7. An inspection support program for modeling electric wires from point cloud data and supporting inspection, The computer functions as an inspection support device, The inspection support device includes a processing unit and a storage unit, the storage unit stores point cloud data including a plurality of three-dimensional coordinate points and three-dimensional measurement points indicating measurement points of the coordinate points; the processing unit plots the coordinate points in a three-dimensional space and performs display processing; Accepting designation of the start point, end point, and intermediate points between them from among the coordinate points that have been displayed, and moving one or more of the designated start point, end point, and intermediate points in a direction toward the back as viewed from the measurement point to determine three reference coordinate points; projecting the three reference coordinate points onto a plane passing through the three reference coordinate points to calculate a quadratic curve, thereby determining a center line of the electric wire; determining a three-dimensional model of the wire based on the centerline; Inspection support program.

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