I'm an OAP and I wanted to make air bags activated by a fall. I have a belt made by Helite
but the electronics are so poor. I'm on my second belt in 6 months and in a few recent falls it hasn't fired. Would be very grateful if anyone could give advice.
Moved to Project Guidance.
Welcome to the Arduino forum,
More info is required so please give a schematic of your project and the code too(code in code tags please).
Thank You.
While you doing the requested post please include links to technical information on the hardware devices. You state: " the electronics are so poor" how did you determine that?
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Have you fed that back to the manufacturer?
You titled the post, "Accelerometer for safety belt" but the accelerometer itself is probably the least of the problems - pretty much any could be used.
The real cleverness is in getting your fall-detection algorithm right.
There is lots of data online about this; eg,
http://webpersonal.uma.es/de/ECASILARI/Fall_ADL_Traces/UMA_FALL_ADL_dataset.html
That last one includes videos of how they captured the data.
#FallDetection #ActivityDetection #HumanActivityDetection
Thanks for your question. The thing is too complicated to be reliable as a wearable piece.
For example, there is a plastic buckle with 12 wires to a small pcb, a flashing light and sounder.
There's obviously a battery box with some sort of connector, that's a problem where the wire exits.
In my mind all connections need to be soldered and two units could be used, l & r, each with its own battery.
The features I've mentioned cause the problems.
I would think the electronics bit (sensors) is very reliable and it's mainly a connectivity issue, that,
when there's strain as caused by bodily movement keeps causing the thing to re-boot.
To my mind what is needed is a unit per side, just a battery and sensor, easily replaceable, with all joints soldered. All that is needed is to respond to a lateral fall and possibly a means to determine which way the fall goes to avoid firing both sides at once as the cartridges are expensive.
Several of my friends have the fruity watches, they do a great job of sensing falls. You might research how they do it or get one of them instead.
Not necessarily. Lots of application use connectors in very "harsh" environments.
It is, of course, essential to choose appropriate connectors for the conditions...
Have i grasped how an accelerometer functions?
Take a single axis and say horizontal is 0 and vertical is 100.
If I were to order it to execute a command. If 25 is reached in 20 milliseconds act, if a longer time elapses ignore.
Thanks John.
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