Scan Field; Figure 30. Usage-Based Sensor Placement Improves Results - quanergy M8 User Manual

Scan Field

Scan Field parameters apply to sensors of Rev D1 and up. These parameters are useful if you
need to restrict the amount of data being transmitted by the sensor to save bandwidth.
The settings (Figure 29 top) activate a scan of the entire field of view to collect all the data
that is possible. You can customize the values, as follows:
1. In the Scan Field Center Angle, type the number of degrees from 0.0 to 360.0.
The value of 0.0 is along the +X axis and away from the sensor cable.
2. In the Scan Field Width in Degrees, type the number of degrees from 0.0 to 360.0.
The value of 360.0 encompasses the entire field of view.
3. Click the Submit button, or continue making changes in the next section.
Three real-world scenarios, including a car roof-mounted sensor, a wall-mounted sensor,
and a drone-mounted sensor, are shown in Figure 30 and discussed below. Settings that
would appropriately address them are listed and shown in Table 9.

Figure 30. Usage-Based Sensor Placement Improves Results

A sensor mounted on the roof of a car represents a typical automotive situation, where the
sensor may need to scan for movement all around the car. Even the rear view is important
for parking and attending to speeders who could collide with the back bumper. Therefore,
the Scan Field Width in Degrees parameter is set at 360.0° to include the entire field of view, that
is, to scan a full circle around the Z axis. The Scan Field Center Angle parameter tells the sensor
where to center the field of view to focus straight ahead as the car drives forward, at the
0.0° point.
A sensor mounted to a wall for security purposes only needs to scan for a 200.0° field of
view, centered at the 0.0 point (straight out from the wall) since the wall is inactive.
A sensor mounted on a drone does not need to scan the entire field of view since the sky
is not important. And if the purpose is to map only the left side of a road from an offset,
a 45.0° field of view centered at 45.0° may be sufficient and conserve precious bandwidth.
M8 Sensor User Guide, QPN 96-00001 Rev K Page 46