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Figure 9: Root and scanners in synchronization
Synchronization should take place before the measurement so that all the sensor data are
time-synced. After a synchronization, multiple measurements can be started and stopped
without additional synchronization. Refer to this
synchronization in Xsens DOT app.
NOTES:
•
Stop the synchronization after all the measurements to prolong the battery life.
3.3.5
Measurement
Two types of measurement are available with Xsens DOT. Table 6 shows the available
output rates for different types of measurement.
Table 6: Output rates
Measurement
Available output rates
Real-time streaming
1Hz, 4Hz, 10Hz, 12Hz, 15Hz, 20Hz, 30Hz and 60Hz
Recording
1Hz, 4Hz, 10Hz, 12Hz, 15Hz, 20Hz, 30Hz, 60Hz and 120Hz
By choosing lower output rates, less data per unit time will be transmitted when compared
to the standard 60Hz output rate. As a result, this can mitigate the occurrence of data loss
in Real-Time Streaming mode and less data will be stored, thereby recording time can be
extended. Conversely, higher output rate (120Hz) is better suited for high-dynamic
applications, where higher amount of data is needed. However, higher output rate is only
available for Recording mode.
Real-time streaming
In real-time streaming, motion data is streamed and logged to central device via constant
Bluetooth connection.
Sensor fusion data, inertial data and other custom data combinations are provided in real-
time streaming, together with packet counter and timestamp. Refer to Chapter 4 for data
output specifications.
