New Line of OnLine Waveform Analysis Laser Scanners

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New Line of On-Line Waveform Analysis Laser
Scanners

• Dr. Andreas Ullrich
• RIEGL Laser Measurement Systems GmbH
• A-3580 Horn, Austria

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contents

• Contents
• V-Line of 2D- and 3D laser scanners
• Heritage of scanning technology
• Echo digitization
• Multi-target capability
• Precision and accuracy
• Estimate of laser radar cross section (LRCS)
• Key features and summary

contents V-Line heritage echo digitization
multi-target capability precision and
accuracy LRCS summary
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V-Line of 2D- and 3D laser scanners

• V-Line of 2D- and 3D laser scanners

Mobile Scanning
Airborne Scanning
Terrestrial Scanning
RIEGL VQ-480
RIEGL VQ-180
RIEGL VQ-250
RIEGL VZ-400

• 60 deg
• 50 kHz -300 kHz
• 800 m (50kHz,20) 450 m (300kHz,20)

• 100 deg
• 200 kHz
• 500 m (20)

• 360 deg
• 50 kHz -300 kHz
• 300 m (80)

• 100 x 360 deg
• 100/300 kHz
• 500 m (80)

Scan Range Laser Clock Max. Range
contents V-Line heritage echo digitization
multi-target capability precision and
accuracy LRCS summary
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heritage of scanner technology
1996 2D Laser Scanning LMS-Q140 2D-Laser Scanner
for Airborne Laser Scanning
1998 3D Laser Scanning LMS-Z210 first 3D Imaging
Sensor for industrial applications
2003 TLS Photogrammetry LMS-Z420 High Accuracy
High Range 3D Laser Imaging Sensor
2004 Full Waveform Analysis LMS-Q560 Waveform-Proc
essing Airborne Laser Scanner
2007 TLS Waveform Analysis LPM-321 Very Long
Range 3D Profile Measurement System
2008 Terrestrial Laser Scanning Online Waveform
Processing RIEGL VZ-400 Online Waveform
Processing 3D Terrestrial Laser Scanner
contents V-Line heritage echo digitization
multi-target capability precision and
accuracy LRCS summary
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inherited and innovative new features

• New Features
• 2-in-1 3D scanner high speed / long range
• high-speed online waveform processing
• online multi-target point cloud (True3D)
• accurate echo waveform assessment
• calibrated amplitude
• display and keypad
• attachable battery
• internal data storage
• integrated WLAN / LAN
• tilt sensor
• laser plummet

• wide field of view
• robust reliable
• harsh environments
• near range photogrammetry laser scanning

LMS-Q560

• echo signal digitization
• digital signal processing
• off-line full waveform processing

• echo digitization
• online waveform analysis

contents V-Line heritage echo digitization
multi-target capability precision and
accuracy LRCS summary
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echo digitization
contents V-Line heritage echo digitization
multi-target capability precision and
accuracy LRCS summary
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multi-target capability
4 m
0.6 m
contents V-Line heritage echo digitization
multi-target capability precision and
accuracy LRCS summary
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multi-target capability
Example car partly obscured by vegetation
contents V-Line heritage echo digitization
multi-target capability precision and
accuracy LRCS summary
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precision and accuracy
contents V-Line heritage echo digitization
multi-target capability precision and
accuracy LRCS summary
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calibrated amplitude

• Amplitude of each target reading is ratio to
  optical echo amplitude at detection threshold, in
  units of dB. E.g., a 23 dB ? optical amplitude
  equals 200 x amplitude at detection threshold
• Instrument provides lookup table with mean
  amplitude of return from target with 100 diffuse
  reflectivity over range
• ? by applying lookup value, amplitude reading can
  easily be converted to diffuse reflectivity in
  dB.E.g., -10 dB ? amplitude corresponds to
  amplitude from 10 target at the same distance,
  13 dB ? retro-reflecting target giving 20 times
  the signal of a white diffuse target at the same
  distance
• equivalent conversion to laser radar cross section

contents V-Line heritage echo digitization
multi-target capability precision and
accuracy LRCS summary
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summary

• V-Line New line of 2D (VQ) and 3D (VZ) laser
  scanners based on pulsed time-of-flight
  technology
• Echo digitization and digital signal processing
• High-speed online waveform processing
• High-resolution multiple-target capability
• High-precision point cloud with amplitude and
  information on echo waveform quality/width and
  LRCS
• Autonomous operation, internal data storage,
  integrated WLAN/LAN, integrated GPS receiver,
  integrated inclination sensors, laser plummet,
  integrated display with online preview,
  attachable battery ....

contents V-Line heritage echo digitization
multi-target capability precision and
accuracy LRCS summary
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