LIDAR

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LIDAR

• LIght Detection And Ranging

• What can you measure with LIDAR?
• distance
• speed
• rotation
• chemical composition and concentration
• of a remote target, which can be either a clearly
  defined object, such as a vehicle, or a diffuse
  object, such as a smoke plume or clouds.

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Examples of LIDAR

• Doppler LIDAR (used in laser speed
• guns) - used for calculating speed of
• a target (can also be used to remotely
• measure true wind velocity)
• Range finders - used for calculating
• distance to a target
• DIfferential Absorption Lidar (DIAL) -
• used for measuring molecular
• concentrations in the atmosphere

Laser speed guns Source www.howstuffworks.com
Laser range finder Source www.robosoft.fr
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Laser Range Finder Example

• 3-D Sweeping laser range finder from
  www.activrobots.com
• Laser typically measures distances up to 32 m
• used at 5m for obstacle avoidance
• Laser scans up to 180 degrees / tilts /- 90
  degrees
• Resolution 20 mm
• Interface RS-232 Serial Interface
• Data Transfer 38.4 Kbaud
• DIMENSIONS 155 x 185 x 156 mm (WxHxD)
• Weight 4.5 kg
• Input Voltage 24 VDC
• Power Consumption max. 17.5 W
• Pan-Tilt Speed 150 per second in each joint
• Requires onboard computer

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The Sweeping Laser's 2 ½-D view of the precipice
and surrounding obstacles