Laser altimeter for UAV
October 6, 2009
Un-manned Autonomous Vehicle (UAV) projects depend on sensors to provide spatial information for route planning and crash avoidance. A developer of an un-manned airplane selected AR3000 distance sensors to measure the height above the ground, whether it was the landing strip, grass, trees or mountains. They needed a sensor that could measure long distances to surfaces of different reflectivities.
In their first trials, the engineers determined that the standard AR3000 could not accurately measure height above black tarmac at close ranges (<8 meters). It was later learned that not enough laser was reflecting off this dark surface and back into the collection lens. So instead, Acuity offered a new version of the AR3000 with a larger laser divergence (10 mrad instead of 2 mrad). This modified sensor device gave improved measurements at close ranges, but diminished the overall, long-range capabilities. This is how the customer arrived at a dual-sensor system. The first sensor measures from 0-50 meters and the second sensor meaasures from 10-300 meters.
To prevent cross-talk between the two laser sensors operating at the same 905 nm wavelength, the engineers used a hardware signal to trigger alternating measurements between the devices.
This same technology solution has been used by NASA AMES Research Center in Moffet Field, CA.
- 2D Profile Scanner
- 3D Scanning
- AccuProfile 620 Laser Profile Sensor
- AccuProfile 820 Laser Scanner
- AR1000 Laser Distance Sensor
- AR200 Laser Measurement Sensor
- AR2000 Laser Distance Meter
- AR2500 Laser Sensor
- AR3000 Distance Measurement Sensor
- AR4000 Laser Range Finder
- AR500 Laser Position Sensor
- AR700 Laser Displacement Sensor
- CCS Initial Confocal Sensor
- CCS Prima Confocal Displacement Sensor
- Confocal Displacement Sensor
- Long-Distance Rangefinders
- Triangulation Sensor Applications