Rebreather World - View Single Post - Point of no return on-the-fly calculation

**Faceless** · 5th November 2006, 21:02

It may sounds weirdo, but after playing with your simulation a little bit more, an interesting idea came to my mind.
As Bob has explained to me, deco obligation is being calculated on the fly ( i.e. there is no static dive tables), and given that O.R. rebreather has full gas sensing including gas pressure in both diluent and oxygen tanks, and in addition it can predict state of scrubber, is it possible with these data to derive a so called point of no return in real time as well ?

If you're using finite state machine then I guess, using just plain dull voting logic for O2 cells is silly, probably you have buit some mathematical model of O2 cell falure modes, then hardcoded it into set of states or trends, right ?
So, let say we have some dive/tank pressure/deco obligation/etc. trends and there are junctions of these trends which may lead to inability to perform a required deco obligation. If we can hit this junction i.e. when user is near that point or has reached it due to gas leak or smth else not so fatal but pretty dangerous, let's warn user about it.
Kinda a piece of common sense.
Sorry in advance if my idea is stupid

Offtopic: Alex, I wish you smooth and nice trip to DEMA and hope your demonstrations will go as you planned. Keep up the good work.

5th November 2006, 21:02	#1 (permalink)
Faceless alone lurking in wrecks Current Rebreather/s: Other CCR Other Rebreather/s: Not Bought Yet Other CCR Join Date: May 2006 Location: France, Montpellier Posts: 214	Point of no return on-the-fly calculation It may sounds weirdo, but after playing with your simulation a little bit more, an interesting idea came to my mind. As Bob has explained to me, deco obligation is being calculated on the fly ( i.e. there is no static dive tables), and given that O.R. rebreather has full gas sensing including gas pressure in both diluent and oxygen tanks, and in addition it can predict state of scrubber, is it possible with these data to derive a so called point of no return in real time as well ? If you're using finite state machine then I guess, using just plain dull voting logic for O2 cells is silly, probably you have buit some mathematical model of O2 cell falure modes, then hardcoded it into set of states or trends, right ? So, let say we have some dive/tank pressure/deco obligation/etc. trends and there are junctions of these trends which may lead to inability to perform a required deco obligation. If we can hit this junction i.e. when user is near that point or has reached it due to gas leak or smth else not so fatal but pretty dangerous, let's warn user about it. Kinda a piece of common sense. Sorry in advance if my idea is stupid Offtopic: Alex, I wish you smooth and nice trip to DEMA and hope your demonstrations will go as you planned. Keep up the good work. Last edited by Faceless : 5th November 2006 at 21:06.
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