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Cellular forums Home > Archive > GPS > January 2007 > Using GPS in test track work
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Using GPS in test track work
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| eganders 2007-01-18, 7:33 am |
| I would like to discuss using GPS in test track work with someone. I
am responsible for a govenment test of a multiple sensor system and the
tests will involve tracking 3 vehicles. My interest is to use the
latest technology to make my test track work the most accurate and
fastest to run. I have a decent budget, but I don't want to expend
$25K or $50K unless there is a real labor savings involved, so I am not
necessarily looking for the most expensive solutions, but if I can rent
it, that might also be OK. One of the best solutions is the OTS
RT-3002 (Oxford Technical Solutions RT-3002), but it is quite expensive
when trying to track the choreography of 3 vehicles (upwards of
$150,000).
I have started off with a Pocket PC accelerometer application using a 3
axis accelerometer and a Hollux 236 GPS receiver to test how accurate I
can maintain an acceleration to speed. My first question would be:
How do I use the data from this and combine it with an on-site
differential GPS system to create the best accuracy.
What kind of accuracy can I expect after "on-site" differential
correction The specs are:
Non DGPS (Differential GPS):
=EF=B9=9B Position : 5 - 25 m CEP without SA
=EF=B9=9B Velocity : 0.1m / sec
=EF=B9=9B Time : 1 =CE=BCsec sync GPS time
EGNOS/WAAS /Beacon:
=EF=B9=9B Position : < 2.2 m, horizontal 95 % of time
=EF=B9=9B < 5 m, vertical 95 % of time
The GPS engine is design is based on SiRF Star III low power
Architecture
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| Sounds to me like you are re-inventing the wheel. GPS technology is in
use in data acquisition systems for road racing sports cars all over the
world. Systems start under $1000, can be installed in minutes.
Also look for systems used in kart racing. Often they will do all you
need, might have better resolution, and are usually cheaper than their
big car counterparts.
Google is your friend
eganders wrote:
> I would like to discuss using GPS in test track work with someone. I
> am responsible for a govenment test of a multiple sensor system and the
> tests will involve tracking 3 vehicles. My interest is to use the
> latest technology to make my test track work the most accurate and
> fastest to run. I have a decent budget, but I don't want to expend
> $25K or $50K unless there is a real labor savings involved, so I am not
> necessarily looking for the most expensive solutions, but if I can rent
> it, that might also be OK. One of the best solutions is the OTS
> RT-3002 (Oxford Technical Solutions RT-3002), but it is quite expensive
> when trying to track the choreography of 3 vehicles (upwards of
> $150,000).
>
> I have started off with a Pocket PC accelerometer application using a 3
> axis accelerometer and a Hollux 236 GPS receiver to test how accurate I
> can maintain an acceleration to speed. My first question would be:
> How do I use the data from this and combine it with an on-site
> differential GPS system to create the best accuracy.
>
> What kind of accuracy can I expect after "on-site" differential
> correction The specs are:
> Non DGPS (Differential GPS):
> ﹛ Position : 5 - 25 m CEP without SA
> ﹛ Velocity : 0.1m / sec
> ﹛ Time : 1 μsec sync GPS time
> EGNOS/WAAS /Beacon:
> ﹛ Position : < 2.2 m, horizontal 95 % of time
> ﹛ < 5 m, vertical 95 % of time
>
> The GPS engine is design is based on SiRF Star III low power
> Architecture
>
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