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LIDAR

LIDAR. 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. LI ght D etection A nd R anging.

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LIDAR

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  1. LIDAR • 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. LIght Detection And Ranging

  2. 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

  3. 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

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

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