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3D LASER SCANNING STEERING SMART

SURVEYING SOLUTION FOR INDIAN RAILWAY

Dr. Kamal Jain, Professor, Department of Civil Engineering,

Indian Institute of Technology Roorkee, India

Indian Institute of Technology Roorkee, India

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Aim

“To establish innovative 3D laser scanning and

Photogrammetry as a key measurement technology to document every fine detail of railway infrastructure in record time and with an extremely high level of accuracy”

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Indian Railway: Challenges: Solution

• Track Improvements

• Advance Infrastructure

• Accurate Signaling, Crossing and Sensor Services

• Quantify Assets and plan there utilization

• Test modern IT solutions with existing Infrastructure

Surveying

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Case Study: Roorkee Railway Station and Track

Laser Scanner - Faro Focus 3D Maximum 1 million points/sec scan rate 330 meter scan range Full 360 Deg HD scan in ±8 min Integrated 3 MP Camera (Quality > 70MP) PDA or Laptop control

Benefits Quickly captures highly accurate on-site conditions Eliminate/identify possible design conflicts Combined with 3D modeling for visualization & drawing production

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Project site planning

Scan Specification Area: 7500 m. Quality: 4x Scan Resolution: 1/8 Time: 6 min/1 Station : 30 Range: > 20 m

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How 3D Laser Scanning Works

1. Select Scanner 2. Data Capture 3. Connecting the Dots 4. Develop 3D Model

5. Results

Plans Clash Detection Virtual Reality Technical Document

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Data Capture: Point Cloud Data

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Data Import: AutoDesk Recap 360

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Stitching step1: Import All Scans

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Stitching step2: Registration

This process essentially "stitches" your scans together into a full representation of your intended project. here is two types of registration

REGISTRATION

AUTO REGISTRATION

MANUAL REGISTRATION

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Auto Registration

Auto Registration becomes available once all files have started importing

Click Merge

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Manual Registration To register a scan, select a scan in each pane then place three points in corresponding

locations between the two

TARGET 1 TARGET 1

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Index Scan Top View

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Final Point Cloud Model

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3D Modeling: 3D Max with Auto Desk Recap

Turn on Create geometry

3D Snap to turn on snapping Grid Point

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Extrude Object Face

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Polygon Mesh Object

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3D Point Cloud

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3D Mesh Model

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Point Cloud to Mesh Model

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3D Electric Pole

Point Cloud Point Cloud + Mesh Model Mesh Model

Mesh Model of electricity pole Joint

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Electrical Structure

Point Cloud

Point Cloud + Mesh Model

Mesh Model

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Over Bridge

Point Cloud

Mesh Model

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Over Bridge: Mesh Model

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Railway Station

Final Rendered 3D Model

Final Rendered 3D Model

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Thank you

By

--- Dr. Kamal Jain,

Professor, Department of Civil Engineering,

IIT Roorkee, Roorkee -247667

Mobile: (+91) 9760026284

Email: kjainfceiitr@gmail.com