By changing the RPM in the equation above you can calculate the azimuthal resolution for any rotation speed.
RPM Resolution
300 0.1°
600 0.2°
900 0.3°
1200 0.4°
Table 8-1 Rotation Speed vs Resolution
8.3.2 Rotation Speed Fluctuation and Point Density
Your sensor uses a feedback control function to maintain its rotational speed within ±3 RPM of its configured setting. This
small variation in speed produces a small change in the azimuthal gaps with every revolution. Consequently, over time, the
sensor automatically “fills in the gaps” between successive laser firings.
A data set from a stationary sensor provides an example of the how the sensor “fills in the gaps,” and the effect is demon-
strated in
Figure 8-2 below
. On the left is a single frame of data. On the right is the same frame and the nine preceding
frames overlaid on each other. You can see how the azimuth gaps are filled.
Figure 8-2 Point Density Example
Chapter 8 • Sensor Operation 51
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