KR102229423B1 - Appearance survey network construction system and coded expression method with the characteristics of the appearance network damage, 3D position and size information as parameters grafted with the 3D BIM model - Google Patents

Abstract

The present invention relates to a system for constructing an appearance inspection drawing with damage characteristics, three-dimensional position, and size information on an appearance inspection drawing grafted to a three-dimensional BIM model, and a coding expression method thereof. The system of the present invention comprises: an appearance drawing investigation means (10) for investigating damage characteristics, three-dimensional position and size information on an appearance drawing; a damage member checking means (20); a damage information code input means (30) for three-dimensionally coding information on a damage position, a type, and additional history of the appearance drawing and inputting the same; a damage information database (40); and a damage information post-management means (50) for maintaining, repairing and post-managing damage information. Accordingly, the coding expression method is realized to reflect a relative position with respect to a three-dimensionally modeled facility regarding damage characteristics and a position of the appearance drawing investigated during precise safety inspection and precise safety diagnosing processes of the facility, such that a three-dimensional model code is defined. Also, a code including information on a damage position and a size is generated to express information investigated in a field in the same space as a three-dimensional facility so as to intuitively determine the cause of damage to the facility, such that a national budget can be saved through an efficient repair and reinforcement method. In addition, an appearance drawing change and repair history can be automatically collected by using a computer with coded classification information. Furthermore, the appearance drawing can be rapidly and accurately created, a position and a size thereof can be adjusted through connection of a three-dimensional pattern code and a parameter, and a parameter is added to manage history information.

Description

Appearance survey network construction system and coded expression method with the characteristics of the appearance network. damage, 3D position and size information as parameters grafted with the 3D BIM model}

The present invention relates to a system and a coding representation method for improving the complex and difficult to understand display of the external network diagram created in a 2D CAD drawing in recording the state of the surveyed external network diagram, and more specifically, a 3D BIM By expressing the degree of damage and the history of the exterior network as a three-dimensional object model based on the facility built as a model, it is possible to accurately input the location and to facilitate future history management to automate maintenance records for safety. The present invention relates to a system for constructing an appearance survey network with three-dimensional location and size information as parameters, and a method for expressing coded appearance, as well as the damage characteristics of the external network diagram grafted with a 3D BIM model that creates a classification code that can be used.

In general, safety checks and precise safety diagnosis for building facilities and civil engineering facilities detect physical defects, functional defects, and inherent risk factors of facilities through field surveys and various tests, and prompt and appropriate repair and reinforcement methods and measures for them. It is carried out to ensure the safety of the facility and prevent disasters and disasters by presenting measures.

These safety checks and precision safety checks are divided into periodic safety checks, precise safety checks, emergency safety checks, and precision safety checks.In particular, precise safety checks and precise safety checks are used to detect defects that cannot be easily found through regular safety checks. In order to find out, it is possible to more accurately check the safety of the facility by evaluating the condition of the facility and evaluating the safety of the precise safety diagnosis by conducting a precise external survey, measurement and test by various measuring equipment and test equipment.

Specifically, when it is necessary to confirm the presence and extent of defects in facilities in such precise safety inspection and precision safety diagnosis, on-site material tests and other necessary exterior surveys should be conducted in parallel, and the appearance survey results of the entire facility surface are shown in drawings. It should be recorded as (Exterior Network Diagram).

Here, such an external network diagram is designed to be prepared for the evaluation of the condition of the facility when performing a precision safety inspection and a precision safety diagnosis. At this time, since the regular regular safety inspection is an inspection by simple visual inspection, the external network diagram is not included in the regular safety inspection form, but it is required to create an external network diagram for precise safety inspection and precision safety diagnosis.

When such an exterior survey network is drawn up, it is necessary to subsequently evaluate the condition for each member of the entire facility and determine the condition evaluation grade for the entire facility. In addition, in the precise safety diagnosis, necessary investigations, measurements and tests, structural calculations, numerical analysis, etc. should be conducted according to the degree of defects in the facility, and the safety evaluation grade should be determined by analyzing and reviewing them.

Here, the condition evaluation refers to the act of evaluating the condition of the facility including the degree of defect by examining the exterior of the facility, and the safety evaluation is based on the data collected through the on-site investigation, and the design documentation and the existing safety inspection. It refers to the act of evaluating the safety of the relevant facility, such as structure, repair, and hydrological analysis, referring to the results of detailed safety diagnosis.

The safety status of the facility can be comprehensively evaluated based on the above-described condition evaluation and safety evaluation result, and the safety status of the relevant facility can be expressed as a safety level according to the comprehensive evaluation of the result of the precision safety inspection or the precision safety diagnosis. For reference, Table 1 shows the tasks for precise safety diagnosis.

Task item Basic task Optional task (if necessary) collecting data
And analysis ㆍDesign book
ㆍFacility management ledger
ㆍConstruction related data
ㆍSafety checkㆍPrecision safety diagnosis result data
ㆍRepair and reinforcement history review and analysis ㆍStructure, repair, hydrology calculation (if there is no invoice)
ㆍPreparation of measurement drawings (if there is no drawing)


Field investigation
And test ㆍAppearance survey of all members and creation of appearance survey network
ㆍOn-site material test, etc.
-Concrete test: Non-destructive strength (rebound hardness test, ultrasonic transmission rate test, etc.), carbonation depth measurement, chloride content flow test
-Steel test: steel non-destructive test ㆍSample collection and indoor test
ㆍTopography, geology, ground survey and exploration, soil survey
ㆍUnderwater survey
ㆍOperation of pilot access equipment
ㆍSteel non-destructive test that exceeds the scope of basic tasks
ㆍInvestigations and tests necessary for additional requests from other management entities and safety evaluation Condition evaluation ㆍAnalysis of appearance survey results
ㆍSite test and material test result analysis
ㆍConcrete and steel durability evaluation
ㆍOpinions on the results of the evaluation of the condition of each member and facility - Safety evaluation ㆍInvestigation, test, analysis of measurement results
ㆍReview and analysis of existing structural statements or safety evaluation data
ㆍLoad capacity and structural safety evaluation
ㆍOpinion on the result of safety evaluation of the facility ㆍStructural analysis
ㆍConsultation by experts in cases where specialized skills such as structural safety evaluation are required
ㆍSeismic performance evaluation and usability evaluation
ㆍSafety evaluation for temporary fixed load Comprehensive evaluation ㆍOpinion on the result of the comprehensive evaluation of the facility
ㆍDesignation of safety class - Repair and reinforcement method ㆍSuggestion of repair and reinforcement methods ㆍPresent seismic reinforcement plan
ㆍSuggestion of facility maintenance plan Report writing ㆍReports such as CAD drawing creation -

On the other hand, as a result of precise safety inspection and precision safety diagnosis for the maintenance of facilities such as building facilities and civil engineering facilities, achievements such as a comprehensive report, an exterior network map, and damage quantity count are prepared.

Among the results of the detailed safety inspection and detailed safety diagnosis of such facilities, the process of counting damaged quantities takes a relatively long time, and there is a high possibility that inconsistency between the field field and the exterior network map, and the exterior network diagram and the damage volume count table are highly likely to occur. There is a problem in that the quality of the results of the precision safety inspection and precision safety diagnosis of the facility may be deteriorated due to the failure to respond to the occurrence of errors in the external network diagram.

1A and 1B are diagrams each showing an exterior network diagram and a damage quantity summary table created at the time of precise safety diagnosis of a facility according to the prior art.

Figure 1a shows the appearance network diagram according to the prior art, and the appearance of a facility in CAD to display cracks, peeling, flaking, mesh cracks, rebar exposure, leaks, deterioration, cavities, erosion, sedimentation, material separation, whitening, etc. It indicates that the death chart was written.

Here, 0.2 (1.0) denoted by reference numeral A denotes a designated notation method of cracks, and 0.1 x 0.1 denoted by reference numeral B denotes a designated denotation method of area loss. At this time, FIG. 1B shows the damage quantity summary table based on the external survey network diagram shown in FIG. 1A.

However, in the case of the appearance network diagram according to the conventional technology, the number of ``damage marking'' cases is limited, so that the appearance network diagram does not reflect different marking habits for each creator, and when the appearance network diagram representation method is inconsistent, the appearance network diagram of the previous vehicle will be used. Can't.

For example, there is a problem in that the method of counting the amount of damage according to the prior art does not have a function to check for errors when the external network is not properly prepared, so that an incorrect input by the creator of the external network cannot be recognized.

In the conventional method of accumulating damage volume, an external network diagram is created on a screen in which a grid in which a format is designated to designate the location of the damage is inserted, and the entire exterior network is inevitably stored in one file to check the location of the damage. It should be. In addition, after separately selecting only the characters and converting them to a DXF file, there is an inconvenience of separately calculating the damage quantity summary table as shown in FIG. 1B. In this case, when calculating the damage quantity summary table, the width, length, area, and location of the damaged area cannot be distinguished, but since it is expressed in text, there is a problem that the damage quantity must be obtained once again based on this.

In order to solve the above problems, "a computer-readable recording medium implementing a method for automatically counting damages of facilities based on an exterior survey network with an error search function for creating an exterior survey network" was registered as Patent No. 1557308. It is disclosed in the publication.

The “computer-readable recording medium in which the method for automatically counting the amount of damage of facilities based on the exterior survey network diagram having an exterior survey network diagram creation error search function” of the above Patent No. 1557308 is implemented by a system as shown in FIG. 2. As shown in Fig. 3, a) a step of creating a field field field 100 for a facility through a site survey at the site: b) creating a facility exterior survey network diagram 200 by a CAD work; c) the step of automatically generating, by the automatic damage quantity summary table generation unit 300 based on the appearance survey network 200, the damage quantity summary table; And d) modifying the exterior survey network diagram 200 by checking whether the damaged location of the facility coincides with the field field site 100, wherein the exterior survey network diagram is appropriately performed in step c). If not prepared, the damage quantity summary table is first calculated, the error of the external survey network and the cause of the error are displayed, and the field field yard 100 and the exterior through the 『Confirmation Marking』 function in step c). By providing a convenient function to check whether the input of the survey network 200 is consistent, the exterior survey network having an error search function for creating an exterior survey network that matches the field field field 100 and the exterior survey network 200 It is composed of a computer-readable recording medium that implements a method for automatically counting damages of facilities based on degrees, and automates the counting of damages that take a relatively long time out of the results of precise safety checks and precision safety diagnosis of facilities. It is possible to quickly and accurately prepare the damage quantity summary table, thereby improving the precision of the maintenance budget selection process for the relevant facility, and by automating the damage quantity calculation based on the exterior survey network, the inconsistency between the field field and the exterior survey network. Can be improved, and the quality of precision safety diagnosis results can be improved by indicating errors and causes of errors in the external survey network.

However, the "computer-readable recording medium implementing the method of automatically counting the damage quantity of facilities based on the exterior survey network map with the function of searching for errors in creating an exterior survey network diagram" of the above Patent No. 1557308 is modeled by the information of the surveyed exterior network diagram. The location is specified based on a specific part of the facility, and when the damage is entered, it is created according to the type of damage, but it takes a lot of time to create an exterior network diagram of the surveyed information and drawings, as well as an expression of the created exterior network diagram. There are parts that are difficult to intuitively grasp the extent of the damage area beyond the boundary of this facility, and the drawing information created in this way and the part for managing the history are separated so that errors between the history information and the external network map can be prevented. There was a difficulty in making individual comparisons by manpower as a method to be confirmed.

In addition, “a system and method for establishing a digital appearance survey network” of Patent No. 2037893 is disclosed in the registered patent publication.

The "digital exterior survey network construction system and method" of the patent No. 20 37893 is a digital exterior survey network diagram construction system indicating a damage state of a target facility, as shown in FIG. 4, comprising: a data transmission/reception module; A memory in which a program for constructing a digital appearance survey network for a target facility is stored; And a processor that executes a program stored in the memory, wherein the processor receives, through the data transmission/reception module, an image in which a vision camera scans the target facility in a first direction by execution of the program, and the first From the image scanned in the direction, a plurality of unit images corresponding to the field of view (FOV) of the vision camera are sequentially extracted, and image stitching that sequentially connects the plurality of unit images is performed to create an integrated image that is a target for damage detection. Generates and detects damage in the integrated image through the learned damage detection model, and performs a quantification process on the detected damage to generate a digital appearance survey network that reflects the quantified damage information, but the image stitching is The feature points are matched with each other based on the similarity between the feature points having similar features between adjacent unit images, but the feature points are matched when the similarity exceeds the threshold point, and the quantification process is the binary image of the detected damage. In the processed and binary processed image, the thickness of the damage is calculated using the Euclidean distance transform, the shape of the damage is extracted using the Skeletonization algorithm, and the shape of the damage is actually By applying a scale factor to calculate the damage size, it is a digital exterior survey network construction system that generates quantified damage information. It is possible to acquire data in a non-destructive, non-contact manner through a vision camera mounted on an attached unmanned body. Through image processing and artificial intelligence, it is possible to extract and quantify cracks in the exterior of large facilities that are difficult to access, and automatically establish a digital exterior survey network. The accuracy of the exterior survey network can be dramatically improved, and due to the nature of automation, the professional manpower and time spent on the exterior survey network can be drastically reduced, and the digital exterior survey network is stored and analyzed according to the time history. Maintenance of It can be used to predict the timing of remuneration.

However, the "digital exterior survey network construction system and method" of the above Patent No. 2037893 also specifies the location of the surveyed exterior network map based on a specific part of the modeled facility, and when entering the damage, the type of damage is determined. Therefore, although it is created, it takes a lot of time to create an external network diagram expressed in the surveyed information and drawings, and there are parts where the expression of the created external network diagram crosses the boundary of the facility or it is difficult to intuitively grasp the extent of the damaged area. In addition, since the drawing information created in this way and the part for managing the history were separated, it was difficult to perform individual comparisons by manpower as a method to check the error between the history information and the external network diagram.

1: Patent No. 1557308 Registered Patent Publication, 2: Patent No. 2037893 registered patent publication.

In the present invention, various defects and problems caused by the above-described conventional techniques, that is, in recording the state of the investigated external network diagram, are complicated and understandable to display the external network diagram created as a two-dimensional CAD drawing as shown in FIGS. 5A to 5H. Invented to solve the difficult part, the object of the present invention is to code parameters for damage characteristics, three-dimensional location and size information, which take a relatively long working process among the results of precision safety inspection and precision safety diagnosis of facilities, and create objects An exterior survey network that has the damage characteristics of the exterior network diagram combined with the 3D BIM model that can quickly and accurately create the exterior network diagram by automating the creation of the exterior network diagram using a 3D BIM model, and 3D location and size information as parameters. It is to provide a diagram construction system and a coding representation method.

Another object of the present invention is a three-dimensional BIM model in which a pattern for confirming the state of the investigated external network is three-dimensional by coding and automating parameters for damage characteristics, three-dimensional location and size information based on the external network diagram, and The purpose of this study is to provide a system for constructing an exterior survey network and a coded representation method that has the damage characteristics of the grafted exterior network map and 3D location and size information as parameters.

Another object of the present invention is the damage characteristics of the external network diagram grafted with a 3D BIM model that can adjust the location and size through the connection of the 3D pattern code and the parameter, and manage the history information by adding parameters, 3 The objective is to provide a system for constructing an appearance survey network with dimension location and size information as parameters and a coding representation method.

Another object of the present invention is to express the degree of damage and the history of the exterior network as a 3D object model based on a facility constructed in 3D, so that an accurate input can be made to a corresponding location, and the future history can be managed to ensure safety. The purpose of this study is to provide a system for constructing an exterior survey network with 3D location and size information as parameters, and a method of coding representation, as well as the damage characteristics of the exterior network diagram grafted with a 3D BIM model that can automate maintenance records for maintenance.

In order to achieve the above object, a system for constructing an appearance survey network having the characteristics of damage, 3D location and size information as parameters of the appearance network grafted with the 3D BIM model of the present invention is as shown in FIGS. 5A to 5H. An external network map survey means (10) for investigating damage characteristics of the pipe network map, three-dimensional position and size information; Damage member identification means (20) for confirming the damaged member irradiated by the external network survey means (10); Damage information code input means (30) for inputting information on the damage location, type, and additional history of the external network by three-dimensional code; A damage information database 40 for storing the coded damage information; It is characterized by consisting of a damage information post-management means 50 for maintaining, repairing and post-managing the damage information of the damage information database 40.

The present invention defines a 3D model code by reflecting the relative location of the facility modeled with 3D BIM technology to reflect the damage characteristics and location of the exterior network that is investigated during the process of inspection and diagnosis of the facility, and the location and size of the damage By creating a code including information on the site and expressing the information on the field survey in the same space as a 3D facility, it is possible to intuitively determine the cause of damage to the facility, thereby reducing the national budget by suggesting efficient repair and reinforcement methods. have. In addition, since it includes coded classification information, it is possible to automatically aggregate the continuous appearance network change and maintenance history using a computer, and by automating the creation of the exterior network diagram using a 3D BIM model for the created object, the exterior network diagram can be quickly created. It is possible to create three-dimensional patterns that can be accurately written and checked, and check the status of the surveyed external network, and can adjust the location and size through the connection of the three-dimensional pattern code and parameters, as well as add parameters to provide history information. There is a special advantage to be able to manage it.

1A and 1B are diagrams showing an exterior survey network diagram and a damage quantity summary table created at the time of a precision safety inspection and a precision safety diagnosis of a facility according to the prior art;
2 is a configuration diagram of a system for automatically counting damaged quantities of facilities based on an exterior survey network diagram having a conventional exterior survey network diagram creation error search function;
3 is a detailed operation flow diagram of a method for automatically counting damaged quantities of facilities based on an exterior survey network diagram having a conventional exterior survey network diagram creation error search function;
Figure 4 is a block diagram showing the configuration of a conventional digital appearance survey network construction system;
5A to 5H are 2D external network diagrams of a conventional steel box girder,
6 is a conceptual diagram of a system for constructing an exterior survey network diagram having as parameters, 3D location and size information, and damage characteristics of an exterior network diagram grafted with a 3D BIM model of the present invention;
FIG. 7 is a flow chart of execution of a coding representation method having damage characteristics of an external network diagram grafted with a 3D BIM model of the present invention, and 3D location and size information as parameters;
8A to 8W are three-dimensional coded external network diagrams according to the present invention,
9 is a configuration diagram of parameter model information of a coded external network diagram according to the present invention;
10A and 10B are actual examples of the configuration of parameter information of a coded drawing according to the present invention;
11A to 11E are 3D external network diagrams of the steel box girder according to the present invention,
12 is a 3D objectized appearance network diagram of a steel box girder according to the present invention.

Hereinafter, with reference to the accompanying drawings, a preferred embodiment of a system for constructing an external survey network having a three-dimensional location and size information as parameters, and a method for expressing coding of the appearance network diagram grafted with the three-dimensional BIM model of the present invention will be described in detail do.

FIG. 6 is a conceptual diagram of a system for constructing an appearance survey network having a damage characteristic of an external network diagram of the present invention, 3D location and size information as parameters, and FIG. 7 is a conceptual diagram of a damage characteristic of the external network diagram of the present invention, 3D location and size information 8A to 8W are a three-dimensional coded external network diagram according to the present invention, and FIG. 9 is a configuration diagram of parameter model information of a coded external network diagram according to the present invention, and FIGS. 10b is an actual example of the configuration of parameter information of the coded drawing according to the present invention, FIGS. 11A to 11E are 3D external network diagrams of the steel box girder according to the present invention, and FIG. 12 is a 3D objectization of the steel box girder according to the present invention. As an external network diagram, the system for constructing an external network diagram having the damage characteristics of the external network diagram, 3D location and size information as parameters of the present invention is an external network survey means for investigating the damage characteristics of the external network diagram, 3D location and size information. (10) and; Damage member identification means (20) for confirming the damaged member irradiated by the external network survey means (10); Damage information code input means (30) for inputting information on the damage location, type, and additional history of the external network by three-dimensional code; A damage information database 40 for storing the coded damage information; It consists of a damage information post-management means 50 for maintaining, repairing, and post-managing the damage information of the damage information database 40.

The damage 3D shape of the damage information includes a damage type selection parameter 41, a relative position definition parameter 42, a damage size definition parameter 43, and a detailed information parameter 44.

The parameters include a 3D model identification name parameter (Item_Name) of damage information, a 3D shape change parameter (Patterm_Type) by selecting a pattern type, a pattern width definition parameter (CWidth), a pattern length definition parameter (CLength), Detailed information parameter (CArea), unit selection parameter (Unit), count parameter (Count), total parameter (Total), other memo parameter (Memo), horizontal positioning parameter (H_Position) and vertical position determination It is composed of parameters (V_Position).

In addition, the coded representation method having the damage characteristics of the external network diagram grafted with the 3D BIM model of the present invention as a parameter, 3D location and size information as a parameter is an external network diagram that investigates the damage of the external network diagram with the external network survey means 10. Damage investigation step (S1 step) and; A damaged member checking step (S2 step) of checking the damaged member with the damaged member checking means 20; A damage information code input step (S3 step) of inputting information on the damage location, type and additional history of the external network map by using the damage information code input means 30 into a three-dimensional code; The damage information storage step (S4 step) of storing the damage information in the damage information database 40; It consists of a post-damage information management step (step S5) for maintaining, repairing, and post-managing damage information with the damage information post-management means 50.

The damage 3D shape of the damage information includes a damage type selection parameter 41, a relative position definition parameter 42, a damage size definition parameter 43, and a detailed information parameter 44.

The parameters include a 3D model identification name parameter (Item_Name) of damage information, a 3D shape change parameter (Patterm_Type) by selecting a pattern type, a pattern width definition parameter (CWidth), a pattern length definition parameter (CLength), Detailed information parameter (CArea), unit selection parameter (Unit), count parameter (Count), total parameter (Total), other memo parameter (Memo), horizontal positioning parameter (H_Position) and vertical position determination It is composed of parameters (V_Position).

In the following, a coded representation method having as parameters, three-dimensional position and size information, and the damage characteristics of the external network diagram grafted with the three-dimensional BIM model of the present invention constructed as described above will be described in detail as an embodiment.

First, in the external network damage investigation step (S1 step), the external network is inspected for damage with the external network inspection means 10, and the damaged member is checked with the damaged member identification means 20 in the damaged member identification step (S2 step). Then, in the damage information code input step (S3 step), the 3D model code (pattern) of the appearance network damage is defined and selected (refer to FIGS. 8A to 8W), and the damage location of the exterior network diagram with the damage information code input means 30 , Type and additional history information are converted into three-dimensional code and entered.

Next, the parameter model information of the coded external network diagram as shown in FIG. 9 is constructed, and the damage information is stored in the damage information database 40 in the damage information storage step (S4 step), and the information is displayed in FIGS. 11A to 11E. As shown in the figure, the coded 3D external network is based on the position relative to the 3D model, and the damage location is specified to represent the model reflecting the size information of the coded external network, and coded as a 3D model (object). The damage information (size, location) and detailed information (history) are separated from the damage information post management step (S5 step) to maintain, repair, and post-manage the damage information with the damage information post management means (50).

As described above, the present invention allows the external network diagram created through the 3D BIM model to be integrated and expressed by allowing the actual location, damage type, size, and history information to be collectively processed. By collectively processing all the information on the exterior network, the quality of the results of the precision safety diagnosis can be improved, and automated processing can be performed in managing the maintenance history.

Although the present invention has been described as a preferred embodiment so far, the present invention is not limited thereto and can be implemented with various changes within the scope not departing from the gist of the invention.

10: external network survey means 20: damage member confirmation means
30: damage information code input means 40: damage information database
41: damage type selection parameter 42: relative position definition parameter
43: damage size definition parameter 44: detail information parameter
50: Damage information post management means

Claims (6)

delete An appearance network survey means (10) for examining damage characteristics, three-dimensional position and size information of the exterior network map; Damage member identification means (20) for confirming the damaged member irradiated by the external network survey means (10); Damage information code input means (30) for inputting information on the damage location, type, and additional history of the external network by three-dimensional code; A damage information database 40 for storing the coded damage information; In the system for constructing an appearance survey network consisting of a damage information post management means (50) for maintaining, repairing, and post-managing damage information in the damage information database (40);
The damage 3D shape of the damage information is characterized in that it is composed of a damage type selection parameter 41, a relative position definition parameter 42, a damage size definition parameter 43, and a detailed information parameter 44. Appearance survey network construction system that has the damage characteristics of the external network map grafted with the 3D BIM model and 3D location and size information as parameters. The method of claim 2, wherein the parameters include a 3D model identification name parameter (Item_Name) of damage information, a 3D shape change parameter (Patterm_Type) by selecting a pattern type, a pattern width definition parameter (CWidth), and a pattern length definition. Parameter (CLength), detail information parameter (CArea), unit selection parameter (Unit), count parameter (Count), total parameter (Total), other memo parameter (Memo), horizontal positioning parameter ( H_Position) and a vertical positioning parameter (V_Position), characterized in that the damage characteristics of the external network diagram grafted with a 3D BIM model, 3D position and size information as parameters, an exterior survey network construction system. delete The appearance network damage investigation step (S1 step) of investigating the damage of the exterior network diagram with the appearance network survey means 10; A damaged member checking step (S2 step) of checking the damaged member with the damaged member checking means 20; A damage information code input step (S3 step) of inputting information of the damage location, type and additional history of the external network map by using the damage information code input means 30 into a three-dimensional code; The damage information storage step (S4 step) of storing the damage information in the damage information database 40; Damage characteristics of the external network diagram grafted with the 3D BIM model consisting of the damage information post management step (S5 step) that maintains, repairs and manages damage information with the damage information post management means 50 In the coding expression method having as a parameter;
The damage three-dimensional shape of the damage information is characterized by consisting of a damage type selection parameter 41, a relative position definition parameter 42, a damage size definition parameter 43, and a detailed information parameter 44. A coded representation method that has the damage characteristics of the external network diagram grafted with the 3D BIM model and 3D location and size information as parameters. The method of claim 5, wherein the parameters include a 3D model identification name parameter (Item_Name) of damage information, a 3D shape change parameter (Patterm_Type) by selecting a pattern type, a pattern width definition parameter (CWidth), and a pattern length definition. Parameter (CLength), detail information parameter (CArea), unit selection parameter (Unit), count parameter (Count), total parameter (Total), other memo parameter (Memo), horizontal positioning parameter ( H_Position) and a vertical positioning parameter (V_Position), characterized in that the damage characteristic of the external network diagram grafted with a 3D BIM model, and a coding representation method having 3D position and size information as parameters.

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