[REQ] Wear OS Fall Detection - Wear OS Software and Hacking General
Hello all,
Any chance someone would be interested in helping to implement fall detection on regular wear OS watches? Something similar to those on the galaxy and apple watches. Am I missing something that should be an obvious reason this hasn't been implemented?
Thanks
I have looked into this, and there are some difficulties to it. Most algorithms for fall detection use continuous accelerometer and/or gyroscope readings. There is a significant battery hit for making these recordings continuously.
As far as I know, the only way to make this viable is to use sensor batching with wakeup accelerometer and gyroscope sensors. That way, the device will be able to sleep for a significant portion of the time and be woken up when there are new measurements. Some devices (I'm looking at you ticwatch pro 3) don't even have wakeup accelerometer or gyroscope. The only way I see to get around this is using the significant motion detector which is always a wake-up sensor. Maybe this sensor will be triggered to wakeup the device when a fall occurs and sensors can be recorded at that time.
I think this is how I would go about it, but maybe I'm missing something
Sounds like a good plan for starters... cheers
permanentusername22 said:
I have looked into this, and there are some difficulties to it. Most algorithms for fall detection use continuous accelerometer and/or gyroscope readings. There is a significant battery hit for making these recordings continuously.
As far as I know, the only way to make this viable is to use sensor batching with wakeup accelerometer and gyroscope sensors. That way, the device will be able to sleep for a significant portion of the time and be woken up when there are new measurements. Some devices (I'm looking at you ticwatch pro 3) don't even have wakeup accelerometer or gyroscope. The only way I see to get around this is using the significant motion detector which is always a wake-up sensor. Maybe this sensor will be triggered to wakeup the device when a fall occurs and sensors can be recorded at that time.
I think this is how I would go about it, but maybe I'm missing something
Click to expand...
Click to collapse
I don't have a great understanding of how these all integrate into the system but I would think that the same sensor, what I am assuming is an accelerometer, that is used for the wake feature could also be used for this. Like you said, using the full suite would be prohibitively expensive from an energy standpoint, but I assume that the wake accelerometer can be used to directly measure the acceleration of the wake motion and could also be used to calculate fall detection, one that measures the acceleration and not just if said motion is occurring. So, there would be no need for the rest of the sensor suite to be used after, correct? As a side note, it would be pretty cool to have the watch read vitals and such and be able to report that with the fall notification via a continuous stream of text messages on set intervals.
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Molvol said: Hi! Can anyone tell me how I get the pressure sensor to get recognized? All apps I tried so far say it's not there, but apparently the compass app from the stock ROM does display the pressure data. Does anyone have the stock pressure app? I'm running AEX. Would a different kernel help for that? Thanks! Click to expand... Click to collapse What u mn??? Pressure app ???
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It seems the sensors and system are not calibrated well enough to handle normal uses. It's overly sensitive to small angle changes. I find it switch the orientations back and forth automatically when it's put on the table from hand-held position. I use this to set orientation for each app: https://play.google.com/store/apps/details?id=jp.snowlife01.android.autorotatecontrolpro It's not solving the problem, just sidestepping it.
CLS_phone said: It seems the sensors and system are not calibrated well enough to handle normal uses. It's overly sensitive to small angle changes. I find it switch the orientations back and forth automatically when it's put on the table from hand-held position. I use this to set orientation for each app: https://play.google.com/store/apps/details?id=jp.snowlife01.android.autorotatecontrolpro It's not solving the problem, just sidestepping it. Click to expand... Click to collapse I will try. Thank you very much for the answer. I will also notify you if this partially solves the problem.
camilov said: Hello... for some time now in my mia3 I have the problem that when I have a horizontal application either a game or the same youtobe on the screen it seems to go back to vertical mode and then horizontal. I wonder if anyone would know why that is. Thank you very much in advance. Click to expand... Click to collapse Try to recalibrate gyroscope sensor, type in dialer *#*#6484#*#* and go to gyroscope section, calibrate. Find flat smooth surface and follow the instructions. It helped me when my phone didn't catch that I'm holding phone in horizontal position. After calibration it's perfect.
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