PD-20001-R1
Stagetracker II User Manual
5
2
System description
2.1
Principles for tracking and use
The Stagetracker II™ system uses active devices (tags) that are positioned on a tracking object. These t
ags periodically
transmit WiFi packets containing identification data, as well as 9 DOF sensor data and status data. These packets are
received by directional receivers, the RadioEyes (RE).
One RE will find the direction towards a tag with a given precision. Using two (or more) REs one can calculate intersections
between the vectors.
The REs is connected (power and data) to the Stagetracker II™ Net interface rack unit. This unit is in turn connected to the
Stagetracker II™ Core processing rack unit.
The S
tagetracker II™ Core is a high
-performance computer running the
Stagetracker II™ suite of programs.
It is the nature of narrowband RF tracking solutions that reflections will occur. It will also be susceptible to shadowing, from
bodies or stage props t
hat somehow are electrically conductive. Part of the Stagetracker II™ solution is to handle these
phenomena, and to do so we have defined objects and structures that aid in this. These will be covered in detail in a later
chapter.
It is also important to
be aware that the Stagetracker II™ is optimized for tracking of persons and objects
- not tags. Small
movements are filtered out, and the system should not respond to small, quick movements, e.g. a person turning around,
and hold the position mostly steady during this.
Every audio or light output module has different requirements to the output signal parameters, and the Stagetracker II™
handles each of them differently.