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Terrestrial Laser Scanning Systems

Terrestrial Laser Scanning Systems. Sara Walsh. Overview. Features How laser scanning works Time of flight Phase Shift Operation Leica HDS 2500 Other models Applications. Features of Laser Scanning. Captures 3D position data of any point Dense data acquisition

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Terrestrial Laser Scanning Systems

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  1. Terrestrial Laser Scanning Systems Sara Walsh

  2. Overview • Features • How laser scanning works • Time of flight • Phase Shift • Operation • Leica HDS 2500 • Other models • Applications

  3. Features of Laser Scanning • Captures 3D position data of any point • Dense data acquisition • Non-contact  No need for instrumentation of sensors on structure • Ability to capture data for structures that are not easy to access • Reasonably accurate for many applications • Versatile • Efficient • Easy to use

  4. How Laser Scanning Works • Time of Flight • Measures time it takes a laser pulse to travel to target and back to determine distance Image: herkules.oulu.fi

  5. How Laser Scanning Works • Phase Shift • Measures change in phase of multiple sinusoidal laser pulses to determine time and distance Image: www.optical-metrology-centre.com

  6. Leica HDS 2500 • Time of flight • Accuracy: ± 6 mm • Range: Up to 100 m • Scan rate: 1000 pts/s • Field of View: 40° by 40° • Software: Cyclone

  7. Operation • Set up equipment • Scanner, computer • Position targets as needed • Scan • Use software for post-processing • Visualization • Stitching/Registration • Meshing

  8. Other Scanning Systems • Leica • HDS 6000 • Faro • LS 880 • Riegl • LMS Z420 • Optech • Trimble • Price range: $70,000-$150,000 Faro LS 880 Riegl LMS Z420

  9. Applications Historical Documentation Palace Museum in the “Forbidden City” in Beijing Images from www.leica-geosystems.com

  10. Applications  Survey Construction Inspection  Images from www.leica-geosystems.com

  11. Applications As-built documentation   Retrofit Images from www.leica-geosystems.com

  12. Applications The Big Dig • Survey • Closeout drawings Images from www.leica-geosystems.com

  13. Applications Forensics • I-35 W bridge in Minnesota • Riegl LMS Z420

  14. Questions?

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