초록 ▼

1. 상용BIM 도구용 표준포맷변환 모듈 개발
- 세계최초 선형IFC변환 모듈 개발 및 인증
2. BIM데이터 경량화 프로그램 개발
- 대량을 폴리곤을 형성하는 지형중심의 경량화엔진 개발
3. 가상현실 내 컨트롤이 가능한 3D 건설 Asset 구축
- 국내외 대표 50종 건설유틸리티 및 아바타 구현
4. 건설공정 재현/분석용 시뮬레이션 플랫폼
- 가상건설 시뮬레이션 플랫폼 개발
5. 건설단계/완료 후 확인을 위한 VR시스템
- 다면투사 방식의 CAVE 시스템 개발

(출처

1. 상용BIM 도구용 표준포맷변환 모듈 개발
- 세계최초 선형IFC변환 모듈 개발 및 인증
2. BIM데이터 경량화 프로그램 개발
- 대량을 폴리곤을 형성하는 지형중심의 경량화엔진 개발
3. 가상현실 내 컨트롤이 가능한 3D 건설 Asset 구축
- 국내외 대표 50종 건설유틸리티 및 아바타 구현
4. 건설공정 재현/분석용 시뮬레이션 플랫폼
- 가상건설 시뮬레이션 플랫폼 개발
5. 건설단계/완료 후 확인을 위한 VR시스템
- 다면투사 방식의 CAVE 시스템 개발

(출처 : 요약서 3p)

Abstract ▼

Purpose & Contents
· Research & development objective
The goal of this project is to develop a dynamic 4D virtual system which is a fusion of construction technology and S / W technology based on files converted from international standard BIM format by models created by various commercial BIM

Purpose & Contents
· Research & development objective
The goal of this project is to develop a dynamic 4D virtual system which is a fusion of construction technology and S / W technology based on files converted from international standard BIM format by models created by various commercial BIM tools aiming at the gradually expanding overseas SOC construction market. We aim to enter the global market as a construction simulation system building solution.

· Research & development contents
■ The Taesung SNI Co. Ltd.
1. BIM data conversion
√ Development of standard format(IFC and Infra IFC) conversion program for commercial BIM tools
√ (Infra) IFC data processing engine
√ Development of shape weighting program for simulation
2. Producing construction utility asset library
√ BIM model construction factor extraction and asset conversion program
√ Production of construction equipment asset library
√ Production of safety factor library for construction equipment

■ The Korea Institute of Civil Engineering and Building Technology
3. Virtual reality (VR) linkage technology
√ Development of program for power wall and 3D projection of VR space
√ Development of dynamic 4D virtual construction platform and VR link S / W

■ The ApexSoft Co. Ltd.
4. Dynamic 4D virtual construction simulation platform
√ Cloud-based Integrated Repository Environment
√ Realization of 4D virtual construction simulation function based on game engine
√ Implementation of record and playback function of simulation execution environment and result

Results
When the results of the research are identified by institution,

■ Taesung SNI Co. Ltd. has developed a proprietary engine for processing
IFC data in commercial BIM program, and exported IFC4, the international standard format, from commercial BIM program for the first time in Korea. Developed construction equipment asset and program with safety factor.

· Integration between API of BIM tool and IFC engine

· Verification Model Creation of Standard Model
In the case of the structure model, the configuration system is defined for the shape object that physically constructs the structure, and the information for identifying each shape object is inputted and constructed. The model for the road is composed of a plan view and a cross section, and the cross section of each object is calculated based on the cross section for every reference interval (20m), and the subject model is also constructed based on the linear and cross sectional views.

· Development of lightweight engine for BIM data
We analyzed the mesh extracted from the IFC engine and used the removed node search algorithm like area without face, edge with zero length, doubled face, non-various edge, mismatched normal, unbound edge, overlapping mesh, diagonal mesh etc. After simplifying the mesh, the texture coordinates of the mesh, the color of the vertices, the curvature of the surface, and the parameters of the surface are deleted, and the vertices and surfaces are maintained. The surface normals and the vertex normals are recalculated, and parameters such as texture coordinates, vertex colors, and surface curvature are not replaced, and mesh regeneration is performed. This regenerated mesh updates the existing .ifc using the IFC engine.

· Construction utility asset development / Implementation of 50 kinds of crane

· Constructed construction technician and fixed safety structure asset
10 kinds of avatar 3D models and motion by job
Site construction avatar classification (based on KOSHA manual).
Establishment of 15 kinds of 3D models and addition of Assets

■ The ApexSoft Co. Ltd. has developed a platform optimized for dynamic 4D virtual construction simulation and has been able to provide the best service from anywhere without using the local courts by using AWS which has the world's largest credibility in operation.

· Advancement
Web browser-based simulation program research and prototype development using online collaboration through research network, addition of functions for services such as advanced simulation function and payment module

· Review of Construction Equipment Simulation / Interference
It provides the function to be able to review in advance through simulation to prevent interference or collision with buildings, field obstacles and other facilities during operation of construction equipment. The collision review feature basically excludes physical situations and allows you to proactively identify situations in which collisions can occur through notification messages

· Developed various prototypes & Simulation of environmental impact
It provides the function that expresses wind speed inputted by the user.
And It provides ground support ratio module which can check the soft ground according to the AND equipment weight etc.

· Drive Simulation
It is implemented by utilizing the AI function provided by the game engine, and it is possible to review whether the actual construction can be avoided by avoiding surrounding members or facilities when constructing at the position defined in the design drawing.

· Process interlock simulation
If you have both a schedule file containing process information and a member file to which process information is to be applied, you can call up the timeline function and check the process of the member.

· Simulation recording function
It provides the recording function that allows the user to record the simulated contents as it is so that the user can reproduce.

· Multi-user collaboration simulation
Provides online collaboration capabilities so that multiple users can simulate within the same project in a networked environment.

· Support for online & offline mode
In case of poor network condition, it supports online mode and off-line mode separately.

· Provide module for safety factor of equipment
Provides a module for checking safety according to the extension of boom

· Web browser simulation utilizing WebGL
Development of the prototype of the web browser-based simulation program which operates without installation by utilizing WebGL technology out of existing application installed in client

· Integration of payment module for using simulation
It provided Cloud-based web system for simulation management, and users using virtual construction simulation service can pay for each project by using web system.

· Cloud configurations that can cope with a dramatic increase in traffic Use AWS's ELB to distribute externally requested application traffic to multiple applications and containers running on Amazon EC2 instances.
And to expand the performance of AWS server, we use the Scale Out / In method of Auto Scaling to cope with traffic increase.

The following safety is guaranteed using AWS's ELB
Availability : Automatically distribute incoming traffic to multiple targets (Amazon EC2 instance, container, IP address, etc.) in available zones, at the same time, receive only normal targets
Security : Provide powerful security functions such as integrated certificate management, SSL code-breaking and etc. based on Amazon Virtual Private Cloud(VPC)
Elasticity : Secure enough application capacity to meet various levels of application load without the need of manual intervention through the fully integration with Auto Scaling and cope with rapid changes of network traffic patterns
Monitoring :
Real time monitoring for the application and its performance is possible through CloudWatch metrics, logging and request tracking, which can check performance bottlenecks of the application stack in individual request units

· VR system and equipment layout in virtual demonstration laboratory
VR system in virtual demonstration laboratory is composed of three major parts including the display system, tracking system and server clustering system. The display system is composed of projector and screen, the tracking system is composed of camera and controller and the server clustering system is composed of VR software and master/slave computer.
Additionally, 3D glasses, MCS for operator, KVM, sound system are required.

· VR hardware in virtual demonstration laboratory configuration diagram
VR hardware is composed of a projector system and tracking system.

· VR software in virtual demonstration laboratory configuration diagram
MCS system is an integrated console system installed in the main server and is developed to control hardware on tablet such as projector on/off and VR/HMDI mode conversion.

· Clustering server
In order to view contents on a 3-sided display of HoloStage, VR system, it is required to synchronize the video of each screen and tracking equipment and create 3D stereo videos. Clustering system, which composes software, is a concept of main equipment and it is composed of application PC and render PC. Application PC is for operating 3D software and render PC is for operating graphic server to visualize contents through each projector. 1 application and 5 render PC are required.

· Function of software
Power wall function in VR environment where dynamic simulation is possible developed 3-sided projection and multi-sided projection and method and it is implemented on 3-sided through the method of video distribution by master slave server structure.

BIM-VR conversion-based data integration function implements linking uploaded contents to the virtual demonstration laboratory. Furthermore, integration of dynamic simulation maximizes the user’s immersion.

Virtual reality interaction function connecting to external equipment is implemented with VICON controller, stereo glasses, dynamic interation equipment and treadmil equipment.

· Concept diagram of software development
Basically, VR controller and VR master are located in the same PC. The messages of VR controller are sent to VR master and directly sent to VR slave according to each command or new messages and transmission data are created and sent from VR master to VR slave. Ultimately, VR slave reacts to user’s commands based on the message and data.

· BIM data processing technology
It was monitored whether the data implemented on master PC is properly distributed to slave and it was checked whether there was no separation between surfaces in the actual multi-sided projection environment through the virtual reality environment projection technology utilizing the neutral file format. Additionally, the dynamic simulation test was run by utilizing existing contents of the bridge, subway station and building.

· Excellence in developed software
The visualization technology of neutral file format-based multi-projection is the first in the world and it is superior in that it can replace overseas software dependant on a specific family.
Existing products are dependent to a specific 3D model product or needed to be converted into their own format. Furthermore, our software has a strong interoperability which can accept various BIM design software data and it is irrespective of the version of 3D CAD software in terms of importing data. Accordingly, it helps to get competitiveness in the aspect of maintenance and economical efficiency.

Plan to utilize R&D results
· Plan to utilize R&D results
It is possible to establish a detailed work plan with the location of construction equipment and the order of the transportation through dynamic construction simulation based on asset, select equipment optimized for the site and establish safety management plan during the construction.

Expected Benefits
· Expected Benefits
1. Overseas expansion of software related to construction planning and management
√ Development and sale of the world’s first solution for dynamic 4D virtual simulation
√ Market preemption for dynamic virtual construction simulation solution

2. Rationalization of construction project execution plan
√ Support for reasonable and efficient construction planning through the system integrating 3D model information and construction process information
√ Reduction of construction cost and period by optimizing utilization of construction equipment
√ Pre-analysis and prevention of the risk of construction safety accident

3. Expansion of the virtual reality market and replacement of imports
√ Addition of construction industry in existing virtual reality application areas such as manufacturing industry, plant, entertainment
√ Replacement of overseas technology imports
√ Overseas expansion of software market related to VR by exporting the developed solution

(출처 : SUMMARY 16p)

목차 Contents

• 표지 ... 1
• 제 출 문 ... 2
• 보고서 요약서 ... 3
• 연구개발사업 주요 연구성과 ... 4
• 국문 요약문 ... 5
• SUMMARY ... 16
• Table of Contents ... 27
• 목차 ... 28
• 1. 연구개발과제의 개요 ... 29
• 가. 연구개발 목적 ... 29
• 나. 연구개발의 필요성 ... 32
• 다. 연구개발 범위 ... 35
• 2. 국내외 기술 개발 현황 ... 37
• 가. 국내기술 동향 및 수준 ... 37
• 나. 국외기술 동향 및 수준 ... 38
• 3. 연구 수행 내용 및 성과 ... 40
• 가. 상용 BIM 도구용 표준포맷변환 모듈개발 ... 40
• 나. BIM데이터 경량화 엔진 ... 56
• 다. 3D형상과 거동해석모듈을 포함하는 건설유틸리티 Asset ... 63
• 라. 건설공정을 직접 재현/분석할 수 있는 시뮬레이션시스템 플랫폼 ... 69
• 마. 건설단계 및 완료 후의 모습을 체험할 수 있는 VR시스템 ... 94
• 4. 목표 달성도 및 관련 분야 기여도 ... 118
• 5. 연구개발성과의 활용계획 ... 122
• 가. 연구개발성과 ... 122
• 나. 활용계획 ... 122
• 6. 연구 과정에서 수집한 해외 과학기술 정보 ... 125
• 가. IFC Convert 비교 ... 125
• 나. 가상건설/현실 국내외 기술현황 ... 126
• 7. 연구개발성과의 보안등급 ... 130
• 8. 국가과학기술종합정보시스템에 등록한 연구시설·장비 현황 ... 130
• 9. 연구개발과제 수행에 따른 연구실 등의 안전 조치 이행 실적 ... 130
• 10. 연구개발과제의 대표적 연구 실적 ... 131
• 11. 기타 사항 ... 131
• 12. 참고 문헌 ... 132
• 첨부1. 자체 보안관리 진단표 ... 133
• 첨부2. 연구실 안전조치 이행표 ... 134
• 첨부3. 기술화 성과 증빙자료 ... 135
• 끝페이지 ... 136