Specifications Of The Lw20 / Sf20 - Lightware LW20 Product Manual

4. Specifications of the LW20 / SF20

LW20/*** (100 m)
Weight 20 g (excluding cables)
Range 0 ... 100 m
Resolution 1 cm
Update rate 48 ... 388 readings per second
Accuracy ±10 cm
Outputs & interfaces LW20/SER: 3.3 V and LW20/I2C: 3.3 V
Power supply voltage 4.5 V ... 5.5 V
Power supply current 110 mA
Laser power <2 mW
Dimensions 19.5 mm x 30.2 mm x 35 mm, housing only
19.5 mm x 30.2 mm x 43 mm with cable gland
Operating temperature -30 .. +50°C
Approvals FDA: 1710193-000 (2017/02)
Housing Aluminium, ABS plastic and glass
Optical aperture 28 mm x 15 mm
Beam divergence 0.2°
Lens material Glass
Connections Wire tail, 5 core plus shield
Enclosure rating IP 67
LW20 / SF20 LiDAR - Product manual - Revision 2
The LW20 is able to measure the first and last return signals when there is more than one
object in the laser beam.
Measuring the distance to the nearest object and the furthest object allows a drone to get
information about potential collisions with trees while simultaneously following the terrain at a
known height above ground.
The LW20 incorporates a laser encoding system that allows units to uniquely identify their own
signals. This prevents interference from other lasers that may be aiming at the same target
surface and makes it possible to run side-by-side redundant systems in safety critical
applications.
There are three different ways to communicate with the LW20:
For machine-to-machine communication there is a built-in command set that uses ASCII
•
mnemonics. These commands work via the serial or the I2C ports.
For human-to-machine communication there is an internal menu system that can be
•
accessed using a generic terminal application via the serial port. The LightWare Terminal
application can be used for this.
For interactive and graphical communication there is a GUI based Terminal application
•
available from the LightWare website. This application also uses the serial port.
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5 of 25 © LightWare Optoelectronics (Pty) Ltd, 2017
LW20 / SF20 LiDAR sensor
Product manual
SF20 (100 m)
10 g (excluding cables)
Serial and I2C: 3.3 V
19.5 mm x 30.2 mm x 32.1 mm
FDA: 1710193-000 (2017/02)
ABS plastic and glass
N/A
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