3D Data Capture Applications of Laser Scanning and Modeling Supporting Offshore Construction
Presentation Overview Who s Speaking Project Scenario Applications What s Next? Project Scope Equipment Utilization Operations Post Processing Deliverables
Who s Speaking Damien Goodyear Subsea Senior Installation Specialist Geomatics Engineering Technology. Previously Held Positions: Previously Held Positions: Dimensional Control Manager, UTEC Survey, Inc. Dimensional Control Surveyor, Serimax/BP Thunderhorse project. Offshore Surveyor for Fugro Jacques Ltd.. Heavy Civil Superintendent for Fairview Investments. Project Engineer for HKR.
Project Scenario Project Scope Client requested 3D as-built data of vessel to supplement out-dated 2D drawing. The SOW included the observations of all deck detail aft of center carousal including pipe firing line, envelope of crane and deck modular components. Initial purpose of as-built detail was to aid in vessel deck layout.
Equipment Utilization Product Specifications Type Range Linearity Error Scan Rate Field of View Phase-Shift 187m ambiguity level <1mm Up to 1,016,727 points/sec 360 Horizontal, 320 Vertical Leica HDS7000 Ultra-High Speed Laser Scanner
Equipment Utilization Product Specifications Leica Viva TS15 Robotic Total Station Type Robotic Total Station Range Up to 5500m with Prism Cluster Up to 400m Reflectorless Dist. Accuracy 1mm +1.5 ppm Ang. Accuracy 1 (0.3 mgon) Key Features Single Person Survey Operation (ATR) Automatic Target Aiming Prism Power Search Image Assisted Surveying Optional Add-on GS15 GNSS Antenna w/rtk
Operations - Survey & Scan Control Layout Leica HDS 6 Black & White, Tilt & Turn Targets. Used to establish scanner control. The portable targets can be tilted and turned for a precise orientation to the scanner. Standard 5/8 thread allows it to interface with several mounting systems Leica GZM29-31 Reflective Tape Targets Used to establish survey control Network. Tape targets are often permanently secured and coordinated with the vessel s reference frame.
Operations Scanner Setup Stations and Data Acquisition Scan locations and settings are based on: Accuracy specified in SOW Coverage areas Scheduling restraints Accessibility
Operations Scanner Configuration
Post-Processing - Survey & Scan Control Traceable metrology 3D graphical software platforms that performs complex analysis tasks. Instrument Interfaces Spatial Transforms Geometry Comparison, Build, & Analysis Automation Dynamic Reporting CAD Exchange SA Reverse Design SA Pipe Fitting
Post Processing - Survey & Scan Control Establishing the Vessel Reference Frame
Post Processing - Survey & Scan Control Best-Fit Transformations
Post-Processing Point Cloud Registration Cyclone-REGISTER Cyclone-REGISTER provides the complete set of tools for aligning point clouds captured from different scanning positions, quickly and accurately. Cyclone-REGISTER supports the use of Leica Geosystems HDS targets to georeference scan data, as well as the ability to align overlapping areas of point clouds without the use of targets
Deliverables - TruView Leica Truview Software modules provide point cloud users with the widest set of work process options for 3D laser scanning projects in engineering, surveying, construction and related applications. Delivered TruView data enables users to extract real 3D coordinates and accurately measure distances. Markups can easily be made for effective communication between the client and service provider.
Deliverables Model Generation Cyclone-MODEL This versatile, powerful module enables professionals to use point clouds directly, to process them into objects for robust export into CAD (and other applications), and to allow robust import of data from CAD (and other applications). Cyclone-MODEL has the industry s largest, most complete and automated set of tools for accurately modeling 3D point clouds as CAD geometry or as meshes for engineering, surveying, construction, architectural and related applications.
Applications As-Built Simulations Equipment clashes and operational Limits Deck Logistics ROV Layout and Integration Component Interface management Pipe Design Clashes Cable Runs Training HSE BIM (Building Information Modelling)
What s Next? Underwater LIDAR sensor Developed specifically for ultra deep water oil and gas metrology and 3D data collection Integrated graphical user interface control system Programmable scan rate and field of view QuickView data visualization capability Output to standard point cloud and mesh formats ROV integrated power and communications
Note the presence and depth of the fins is difficult to capture with the 2D ROV camera Primary identification is the shadows caused by sunlight Fins are 20.5 cm apart and 17.8cm deep The height of the fins and the distance between fins was verified to within 2mm