Discussions

airspeed/airpressure sensor data seems to be unstable

Posted by kolyan2003 on March 2, 2011 at 4:06pm

Hi all,

I'm getting readings from airpressure and airspeed sensor that are somewhat unstable.

It happens when board powered up through USB only, BEC only, and through USB + BEC.

readings from the sensors jump from 0 to 10m/s (airspeed) and from -0.3 to 1 (altitude)

Is this behavior normal? If not - how can i fix it?

This is a screen cap of test/airspeed first, then test/airpressure second (you may need to watch it in 480p for data to be readable):

Plane is stable and away from vents, fans, etc.

Sensor is pmxv7002dp

Thanks!

You need to be a member of diydrones to add comments!

airpressure, airspeed, ardupilot, mega

Email me when people reply –

Replies

kolyan2003 March 3, 2011 at 5:23pm

i took a voltmeter and connected it to power at the telemetry port: https://www.youtube.com/watch?v=U-wb5So6WE0 - voltage jumping between 4.97 and 5.07 - thats a clue!
Unplugged Ublox gps unit - rock solid at 5.23, airpseed became solid too.

Will try to power up GPS unit separately from APM.

This reply was deleted.

Activity

Neville Rodrigues liked Neville Rodrigues's profile

Santiago Perez liked Santiago Perez's profile

#xg { position:relative;top:120px; } #xn_bar { top:120px; }

Hello, you need to enable JavaScript to use diydrones.

Please check your browser settings or contact your system administrator.