[PSUBS-MAILIST] Inertial navigation, 3-axis

[Private via Personal_Submersibles]

I worked with a volunteer who developed a low cost system with a small screen and a low cost sensor of the class used in cell phones. The display had a "start" button to reset, and displayed a track of the path followed. He did a great job of it, but our conclusion was the sensor just didn't have sufficient accuracy yet. This was about 2/3 years ago.

Best,

Alec


> On Dec 12, 2014, at 10:07 PM, Hugh Fulton via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
> 
> Hi Jim,
> That is a really great bit of information you have posted.  I am really keen to progress something that is afforadable.  Has anyone put together an INS system which is low cost?
> I was in touch with someone a couple of years ago who was going to do a system for less than half what is currently available but have not heard anything more.  Any other leads?
> Regards,  Hugh
>  
>  
>  
> From: Personal_Submersibles [mailto:personal_submersibles-bounces at psubs.org] On Behalf Of via Personal_Submersibles
> Sent: Saturday, 13 December 2014 3:05 p.m.
> To: personal_submersibles at psubs.org
> Subject: [PSUBS-MAILIST] Inertial navigation, 3-axis
>  
> Hi Hank,
>  
> I'm a bit delayed in getting back to you.  Below are some links regarding Inertial Navigation Systems (INS).  Some are specifically designed for underwater applications.  The modules have become quite small (1" square).  My desire is to have the entire track display onscreen and download it to a thumb drive at the end of the mission. 
>  
> One of the advantages of 3-axis INS is that it can provide heading, depth, rate of ascent/descent, speed independent of current, drift, tilt, etc.
>  
> Obviously a starting point has to be established on the surface (GPS or other position reference and compass heading).  However in many situations such as when operating from a lake ramp, you could just label the launch as "Starting Point" and call the initial heading "0" or whatever no matter which direction you're headed assuming you're going to be returning to the starting point.
>  
> SBG Systems has been making rapid advancements in accuracy and cost reduction for INS.  However inertial changes in small, manned submersibles are much smaller than in submarines, boats, and aircraft.  If I were to the point of putting together a system, I would contact them for advice on which components to use to build it.
>  
> Jim
>  
> SBG Systems:
>  
> http://www.sbg-systems.com/products/subsea-inertial-systems-overview
>  
> http://www.sbg-systems.com/products/inertial-systems-overview
>  
> http://www.sbg-systems.com/docs/Article-SBG-SYSTEMS-ON&T.pdf
>  
> http://www.sbg-systems.com/products/ig-30-3d-compass
>  
> Sparkfun:
>  
> https://www.sparkfun.com/products/12916
>  
> https://www.sparkfun.com/search/results?term=compass&what=products
>  
> OceanServer:
>  
> http://www.oceanserver-store.com/
>  
> http://www.ocean-server.com/compass.html?gclid=CKHazZGbiLMCFQpgMgodAQgALg
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> 
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