Kashyap,
My bad, I did not read your original email before replying to
Bernd's email. I now went back and read it.
You're right, the Neo-m8l/u modules should be integrating the data
from the GNSS with the on-board gyro and accelerometer data. You
don't need to do your own integration of sensor data using (Kalman)
filtering. The neo-m8l/u modules may also be able to get wheel-speed
input, but the links on the webpage doesn't seem to work for me.
Q2) You ask for 5 meter accuracy. What is the actual purpose for
this goal? Are you looking for specific location at each GPS point,
or are you looking to determine when the vehicle passes a specific
GPS point?
Besides this, look closely at Gary and Greg's replies.
Best regards,
Kai
On 29-12-2019 18:53, Kashyap Gada
wrote:
Bernd & Kai,
If we are using above products do we still need to process
the positioning information we have?
I'll go through Kalman filter as per your suggestion. Don't
have any model of tracks.
Any specific books/web pages that provide these intricate
details?
Regards
On Sun, Dec 29, 2019 at 10:28
PM Bernd Zeimetz <
address@hidden> wrote:
On 12/29/19 5:37 PM, Kai Harrekilde-Petersen wrote:
> I would more look into adding a 2D (or 3D) accelerometer
than a gyro,
> since the train is (very) unlikely to do significant
yaw/pitch/roll
> movements (unlike small planes, helicopters and
motorcycles).
Yes, that is what I had in my mind, but since you get gyro +
accellerometer in one chip these days, I somehow started to
call them
gyro only ;)
Gyro might still be interesting, though, if you want to
measure steep
climbs or call the rescue if the locomotive is rotating in
unexpected
ways...
--
Bernd Zeimetz Debian GNU/Linux
Developer
http://bzed.de
http://www.debian.org
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