NOTE
As well as the standard indicators described below, the indicator functions of the LEDs
and the 7-segment display can be configured in SOPAS ET for the device (SOPAS ET:
Project tree
,
LMS…
,
Parameters
,
Network/Interfaces/IOs
,
Display
).
For additional information,
see "LED fault indicators", page 81
.
3.6
Principle of operation
3.6.1
Measurement principle
The device is an opto-electronic LiDAR sensor that uses non-contact laser beams
to scan the outline of its surroundings. The device measures its surroundings in two-
dimensional polar coordinates, relative to its measurement origin. This is indicated by
small marks on the sides of the optics cover. If a laser beam strikes an object, the
position of that object is determined in terms of distance and angle.
Figure 5: LiDAR sensor with a scan plane
3.6.2
Range finding
The device emits beams pulsed by a laser diode. If the laser beam is reflected by an
object, the reflected beam is received by the sensor.
The distance to the object is calculated on the basis of the time that the pulsed light
beam requires to be reflected and received by the sensor.
t
1
2
1
Emitted pulse
2
Receive pulse
PRODUCT DESCRIPTION
3
8013796/1ALS/2021-03 | SICK
O P E R A T I N G I N S T R U C T I O N S | LMS5xx
17
Subject to change without notice
