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After freezing, the parameters of stationary beacons and submaps are transferred to the
beacons and stored in flash. Further, to change the parameters of the map, you will need
to unfreeze it and freeze it again in order to repeat the transfer of parameters to the
beacons.
Testing
The ability of a beacon to correctly position itself and determine the submap in which it is
located completely depends on the correct measurement of the distance to each
stationary beacon
Stationary beacons in a submap emit at different frequencies. It is important to ensure the
same reception conditions from different stationary beacons and frequencies,
respectively, because the emission spectrum at one frequency has limited suppression at
a neighboring frequency.
The signals can flow into adjacent frequency channels, this is reflected in the appearance
of false triggers and incorrect determination of the distance, as a result of incorrect
positioning, incorrect jitter detection and, accordingly, incorrect determination of the
submap.
To find the causes of such problems, the dashboard has a digital oscilloscope mode, it
displays the envelope of the received signal and trigger triggers. It is necessary to verify
that the main candidate corresponds to the actual distance and that there are no other
candidates that could interfere with the correct measurement.
As a rule, false candidates preceding the correct one is a consequence of the penetration
of a different frequency, you can check this by turning on the “only selected transmitter”
option, and only the selected beacon on one frequency will emit, if the false candidate
disappears, then this is penetration of a different frequency and you need to check
whether the restrictions are met described above.
Another case is re-reflection, when the signal reflected from neighboring objects and
turns out to be higher than the main candidate. As a rule, in this case the false candidate
is further than the main candidate, but it cannot be much further due to attenuation. In this
case, you can use the
“Min. over raise for new front
” beacon’s setting.
This parameter prefers the candidate who is closer.
When positioning is done correctly, you need to make sure that the given jitter is correctly
estimated, the stationary beacon emits a signal without delay and with a delay equal to
the jitter code multiplied by granularity, in an oscilloscope this looks like a shift of the main
candidate by jitter.
Map built, tested and ready to use.
Summary of Contents for Mini-RX
Page 1: ...Marvelmind Indoor Navigation System Operating manual v2020_12_14 www marvelmind com ...
Page 16: ...16 HW v4 9 beacon with Mini TX size comparison Beacon Industrial RX Beacon Industrial Super ...
Page 30: ...30 Figure 6 Two external microphone connection ...
Page 34: ...34 Figure 9 One external microphone soldering Figure 10 Two external microphones soldering ...
Page 60: ...60 Help video https www youtube com watch v NHUnCtJIYXc ...
Page 69: ...69 The system is now fully operational ...
Page 97: ...97 The system is now fully operational ...
Page 106: ...106 The system is now fully operational ...
Page 115: ...115 The system is now fully operational ...
Page 136: ...136 Advanced settings TBD Enabling will allow direction along with location TBD TBD TBD ...
Page 171: ...171 Floor 5 is enabled Floor 4 is enabled ...
Page 175: ...175 Z X ...
Page 190: ...190 Choose color and press OK Color applied Now background matches floorplan ...
Page 196: ...196 7 18 IMU axis positioning Super Beacon IMU axis positions HW v4 9 IMU axis positions ...
Page 197: ...197 Mini TX IMU axis positions Mini RX beacon IMU axis positions ...
Page 201: ...201 Real time player turned on ...
Page 204: ...204 8 1 Super beacon external interface pinout top view ...
Page 205: ...205 8 2 Beacon HW v4 9 external interface 4x4 pinout top view ...
Page 206: ...206 8 3 Modem HW v4 9 external interface pinout top view ...
Page 240: ...240 Right mouse button on it Set movement path Shift Left mouse click to add point ...
Page 250: ...250 Contacts For additional support please send your questions to info marvelmind com ...