Description
The Mini-RX Beacon can be used in both the Non-Inverse Architecture (NIA) and the Inverse Architecture (IA):
Supports license-free 915MHz ISM band (US) and license-free SRD band 868MHz (EU).
All Mini-RX beacons have 6D IMU (3D gyro + 3D accelerometer) onboard.
The Mini-RX beacon differs from regular Beacon HW v4.9 in several ways:
- The Mini-RX is an RX-only beacon, i.e. it can receive, but it cannot transmit ultrasonic signal
- The fact that it is RX-only makes it far more sensitive, i.e. you will get a longer range between Beacon HW v4.9 and the Mini-RX than between Beacon HW v4.9 and Beacon HW v4.9
- The Mini-RX beacon can receive any ultrasonic frequency from the bands: 19kHz, 25kHz, 31kHz, 37kHz, 45kHz. The filter can be simply selected in the Dashboard. At the same time, the ultrasonic frequency of Beacon HW v4.9 is HW-defined by ultrasonic sensors and can’t be changed
- The Mini-RX beacon can receive several ultrasonic frequencies at once. That is used in Inverse Architecture. See the comparison
- The Mini-RX Beacon is significantly smaller, than Beacon HW v4.9 in volume and weight. See the Beacons Comparison table
- The Mini-RX Beacon can work with regular Beacons HW v4.9 in any combination as a part of a Starter Set or as a part of navigation systems and it is a superior RX-only replacement to HW v4.9. At the same time, since it is RX-only beacon, the Beacons HW v4.9 are here to stay as universal dual-use beacons. In all cases, beacons shall use the same radio band
Description
The Mini-RX Beacon can be used in both the Non-Inverse Architecture (NIA) and the Inverse Architecture (IA):
Supports license-free 915MHz ISM band (US) and license-free SRD band 868MHz (EU).
All Mini-RX beacons have 6D IMU (3D gyro + 3D accelerometer) onboard.
The Mini-RX beacon differs from regular Beacon HW v4.9 in several ways:
Additional information
Questions and Answers
Hi
Dose it also can give except the XYZ position, also rotation data?
It gives raw 3D gyro + 3D accel + 3D compass data.
Additionally, with IMU fusion enabled, quaternion is streamed out.
Even more, with Paired Beacon feature, you will have location + direction without any IMU drift: https://www.youtube.com/watch?v=aBWUALT3WTQ
What’s the battery lifetime of Mobile Beacon Mini-RX at 1Hz in Inverse Architecture?
“Future power saving features may increase battery life to 1year and more”. Do you have more information about this feature?
We haven’t done yet detailed tests and focus in others things in SW development than power savings … There are really many parameters affecting the battery lifetime, most of all, size of the submap. Larger submap – shorter battery lifetime.
Now, we would suggest using these figures for the budgetary estimation:
Stationary beacon with 8Hz update rate => up to 30h
Stationary beacon with 1Hz update rate => 1 week
Is it possible to attach external microphones to the beacon so that the beacon itself can be covered / hidden and only the microphones are showing?
Yes, it is possible:
– https://youtu.be/FwH-ScrTnm8
– https://marvelmind.com/product/external-microphone-ip67/
– https://marvelmind.com/product/horn/
Dear Admin,
Previously, we purchased the starter Set SuperNOVA-3D, now we are considering purchasing a set with Beacon Mini-RX.
Could you send me a CAD-3D model of the Beacon Mini-RX? We need the model to develop a mechanical model.
I hope for a quick response from you.
Please, notice that Mini-RX has more inside that is visible from the outside:
– Optionally, it is possible to have a special connector installed and to have UART 3.3V out via the connector: UART Cable for Mini-RX
Here are links to the Mini-RX dimensions:
– Beacon_Mini-RX_body.STL
– Beacon_Mini-RX_body.STEP
Is it possible to utilize the microphone on your smartphone as an alternative to this device? Essentially, could you use the modem + super beacon setup to track phones within a space?
In a very distant theory, yes. Constrains:
1) The microphone in the phone is not an ultrasonic microphone. It is ability to receive ultrasonic is very limited
2) Most likely, internal digital filters cut the band sharply after 20kHz. With very low level access to the phone’s SW that could be re-done, but that is pretty low lowel
3) Microphones are physically designed to get the sound from mouth – not from the outside
4) Precise clock synchronization is difficult… Required to microseconds. Doable over WiFi or BT or cellular, but with special tricks
So, yes, it is a good option to consider in theory, but have many serious external restrictions.
One could take an existing phone and heavily modify it, including HW and DSP SW. Then, yes, thing would work. With an external headset – very possible option.