[PSUBS-MAILIST] Environment and Control software

[Jon Wallace via Personal_Submersibles]

HI Cliff, thanks for the feedback.  Alarms are located on the left side 
under the yellow/black warning graphic.  Each one functions as both an 
alert and alarm.  For example, a yellow alert lights up "DEPTH" at 500 
feet to warn of approaching maximum depth.  At 600 feet it turns into a 
red alarm.  These alerts and alarms can only be disengaged by retreating 
back to a non-alarm operating environment (ie.. decreasing depth to less 
than 500 feet).  Audio alerts will accompany the visual ones.

Depth is available on all displays in the lower left corner.  Data 
logging is included and can be written to a USB drive and 'replayed' on 
any other computer that has the same software on it or even imported 
into something like a spreadsheet.  However, if I end up with a tablet I 
will likely log there directly.

Battery information will be added when I get those sensors.  This design 
lends itself well to semi-automated control, for example typing in a 
target depth of 100 feet and then letting the computer operate the 
motors and monitor vertical rate of descent/ascent, slow down when 
approaching the target depth, and then shutting off the motors at/near 
target depth.

A more distant and advanced project would be, I don't know, maybe 
inertial navigation using an IMU.

Jon


On 8/10/2015 12:19 PM, Cliff Redus via Personal_Submersibles wrote:
> Jon, your first pass at HMI for your boat looks good.  I like the 
> overall layout and data seems to be presented in logical and 
> straightforward manner.  I think it would easy for someone other than 
> yourself to get the state of the boat from this HMI.
>
> On your DIVE panel, I would add a couple of items.  The first is the 
> battery SOC and air SOF(state of Fill, 0-100%). These are key 
> items for the home screen.  Also, I would add a proximity switch on 
> hatch so that the hatch state is shown. This can also be used to 
> lockout diving the boat unless the hatch switch is closed.  Also I 
> would add Altitude.  Airmar has a sensor called the DST800 that gives 
> boat speed, depth (altitude) and water temperature.   Signals comes in 
> as a RS-232 ASCII string that you parse.  On the NAV screen, I would 
> include depth and altitude.  On HIST screen, rather than looking at 
> min and max on key variable's, I would recommend that up set up data 
> logging and log all ship systems say every minute.  Most PLCs and 
> associated HMIs have data logging capabilities.  This allows you to 
> download all sensor measurements and switch states as a function of 
> time.  This is useful to analyze how the boat performed after the dive 
> and also serves a Black Box for the sub.   I did not see any alarm 
> database.  Need to be able to see and hear and audible alarms an such 
> items as low air pressure, O2 and CO2 out of range ...
>
> Best regards
>
> Cliff
>
>