Marvelmind IA-04-2D-Badge, Operating Manual

Page: 24 / 263

24
3.2. Stationary beacon
-
Usually mounted on walls or ceilings above the robot
with ultrasonic sensors facing down
—to provide the
most robust unobstructed ultrasonic signal coverage
to the robot. However, for automatic landing and
indoor navigation of copters, for example, it is
recommended to install mobile beacon horizontally
on the belly of the copter so that the beacon would
be looking downwards
-
The position and orientation of the beacons should
be chosen in a way that provides maximum
ultrasonic signal coverage. System efficacy strongly
depends on the quality of ultrasonic signal
received by stationary beacons
-
Stationary beacons emit and receive ultrasound during the map configuration
period. In non-inverse architecture once the map is formed and frozen, they only
work as receivers. In inverse architecture they only work as transmitters.
-
Stationary beacons have no exterior differences with regard to mobile beacons
-
The mobile and stationary beacons can be easily interchanged during configuration
in the Dashboard
-
There are 433MHz(out of production, get bug-fixing SW update only) and
868/915MHz versions available. A proprietary radio protocol is used for
communication and synchronization. Other ISM bands are available upon request
as well
-
Stationary beacon can be equipped with full-size 165mm antenna , which provides
more robust radio connection between modem and beacons.
Fig.1: Super-Beacon as an example