GPS Update fequency and Dead Reckoning

**Scouse Monkey** · 04-27-2005, 03:40 PM

cheers geezer.

currently looking at u-blox and tyco modules.

This is a good source of any OEM modules: their USB and serial level ones look ready for use. Pretty good price but nothing special (ie no DR or >1Hz updating)
http://www.rfsolutions.co.uk/acatalo...S_Modules.html

**jcdillin** · 04-27-2005, 03:44 PM

So it looks like we can't read it any faster than 1hz? if thats true then i'll just get the DR module.

**Scouse Monkey** · 04-27-2005, 03:48 PM

Originally Posted by jcdillin

So it looks like we can't read it any faster than 1hz? if thats true then i'll just get the DR module.

I am thinking DR anyway. I spoke to the guys in avionics and they were well impressed with the car PC stuff and apparently this is more advanced than any current udnergrad research and the lecturers were amazed when i showed them the module with built in Kalman filters! The guy was describing them too me and said i would need to make them and iwas like "well they are all built into the board" - they asked why i didnt do avionics!! lol - me!! I am ****e at electronics. But they did have a module running on an RS232 and some othe rone with a 4 in the name so I can get help makign the stuff.

I bet my speedo doesnt have the pulse data! I know the DT version does but the damn french probably just used some Camembert to link the speedo to the gearbox!!!

**Scouse Monkey** · 04-27-2005, 03:51 PM

i am thinking what the point in fast GPs data if you have a ****e lock?

http://www.tycoelectronics.com/gps/deadreckoning.asp

where was that animated example?

**jcdillin** · 04-27-2005, 04:05 PM

Originally Posted by Scouse Monkey

i am thinking what the point in fast GPs data if you have a ****e lock?

http://www.tycoelectronics.com/gps/deadreckoning.asp

where was that animated example?

yeah but with my tiny mag mount antenna I get 11 to 12 sats all the time, I've never tried a 16 channel. heck it might get even more

**jcdillin** · 04-27-2005, 04:07 PM

Originally Posted by Scouse Monkey

I am thinking DR anyway. I spoke to the guys in avionics and they were well impressed with the car PC stuff and apparently this is more advanced than any current udnergrad research and the lecturers were amazed when i showed them the module with built in Kalman filters! The guy was describing them too me and said i would need to make them and iwas like "well they are all built into the board" - they asked why i didnt do avionics!! lol - me!! I am ****e at electronics. But they did have a module running on an RS232 and some othe rone with a 4 in the name so I can get help makign the stuff.

I bet my speedo doesnt have the pulse data! I know the DT version does but the damn french probably just used some Camembert to link the speedo to the gearbox!!!

Thats awesome, i'm gettting ready to order the DR module. Now I just need to find out where I can get the speed pulse from. I might be lucky and it's fed to the radio as it has ASC

**Scouse Monkey** · 04-28-2005, 07:25 AM

I am hoping the speedo deals witht he pulse directly so I can just tap into the loom on the back of it (right next to my PC

).

Spoke to some more guys at Uni and they were intrigued but no help as they didnt know the modules existed and are used to dealing with proper intertial nav. Apparently the new Airbus A380 has a kickass system.

**RoyN** · 05-11-2005, 12:14 PM

camembert to link the speed data...

you crack me up Scouse...

Sorry to revive this but gotta subscribe.... do you have anything working thus far? as I posted on the other thread the ublox looked pretty cool in concept and the docs and tests are pretty convincing... my cit coverage with usb gps sucks, i'm going to try out oem module from garmin next, but DR would be the utmost goal... The "ready to rock" system from u-=blox (developer evalkits) were like 1500$, way above what I expected(sub $500) considering the module for GPS-DR was under $200... oh well...

Keep us posted of progress, I'd defiinitely be interested in getting one of your prototypes if you ever sell them, or a kit to build