Re: [PSUBS-MAILIST] Preasure Gauge

["George Slaterpryce" <gslaterp@hotmail.com>]

Application will be for ROV depth calculations.
Everything on the ROV runs through the various Mcs and then back up to the 
control station (laptop) so everything I do either has to have video 
surveilence so I can read the gauge (not really the best solution) or must 
electronicly report back to the MC so it can relay it back up to the laptop.

Weight is an issue. I'm trying to design a 1-liter displacement ROV 
(micro-rov, camera with thrusters) which means I have 1 kilo to play with 
while still trying to make the preasure hull withstand the preasure at 100m. 
So micro-electronics and the smallest things I can find to do a job are my 
biggest obstacles.

I've even considered using teflon for the hull material to save weight.

George Slaterpryce
----- Original Message ----- 
From: "Sean T. Stevenson" <cast55@telus.net>
To: <personal_submersibles@psubs.org>
Sent: Thursday, February 23, 2006 10:12 AM
Subject: Re: [PSUBS-MAILIST] Preasure Gauge


> What is the application?  For a psub, a simple Bourdon tube pressure gauge 
> would seem to be easiest.  Even subs with complicated electrical and 
> computer control systems should have one.
>
> -Sean
>
>
> George Slaterpryce wrote:
>
> > I'm looking to make myself some sort of preasure gauge so I can calculate 
> > depth, but the best Idea I can come up with is to embed a Preasure sensor 
> > in a ball of silicon and mount it to the outside of my preasure hull, I'm 
> > thinking that the silicon will transfer preasure to the sensor evenly as 
> > well as protect it from water damage. The biggest problem with that would 
> > be the wires coming out of the silicon ball causing rippage if any stress 
> > was put on them, thus allowing water in however minute amount to get to 
> > the sensor, so I'd have to make some sort of cradle for it so it can't 
> > move... maybe epoxy it onto a machine brass craddle that can be mounted 
> > to the preasure hull which I can then run the wires through so I can 
> > connect the Preasure sensor to the MC this way I can avoid loose wires. 
> > Another problem is would the silicon transfer the preasure so I could get 
> > an accurate reading.
> >  Am I over thinking this, is there some simple solution I'm over looking?
> >  Illustration of what I'm talking about at 
> > http://www.captovis.com/marine/designsketches/preasuresensorandcradle.png 
> > Kind of small and all, but I stick my doodles in that directory so I can 
> > reffer to them later. Kind of like a "design written on a napkin" 
> > repository.
> >  Thanks
> > George H. Slaterpryce III
>
>
>
>
>
>
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