Discussions

airspeed sensor not working

Posted by Allan Harley on January 1, 2011 at 11:56pm

ive installed my airspeed indicator but when i tested it in console mode under test the data output i got was nanm/s and it didnt change when i try breathing in the tube

i checked that voltage is presant but im not sure how to check the analoge output has anyone seen this please

cheers

 

forgot to add i changed the firmware to the dec 13 version and it didnt change

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Replies

  • John Campen April 9, 2018 at 4:49am

    Regarding the Analog Airspeed Sensor MPXV7002DP on a Pixhawk and using Qgroundcontrole
    We cannot get this air speed sensor to work on our VTOL Quad (ranger) plane using the Qgc Quadranger firmware. We have it wired into the ADC 6.6v port and when we try to calibrate it the error massage comes up. Its on and working and Qgc seems to detects it but always comes up with and error, [cal] calibration failed: airspeed. Any ideas?

  • iTech September 24, 2013 at 9:52pm

    Hi All,

    I have a problem with my airspeed indicator ( MPXV7002DP ) When ever i check the voltage on the pins its shows 

    Pin 2 & 3 = 4.9v

    Pin 2 & 4 = 4.8v  

    Pin 3 & 4 = .01v

    Any body has same problem ? 

    Thanks

    Aytek

  • Austin Laws June 27, 2013 at 8:45am
    @chris I couldn't find the manual many thanks for that massive help.
  • Austin Laws June 25, 2013 at 9:31am

    Hi I have the API model number MPXV7002DP. I can not see anywhere which way u put the silcon pipes on and no where how and where it goes on the APM 2.5 board. Could someone please help and im so fed up trying different things and worrying if im about to destroy the board!!!!

  • Darren February 25, 2011 at 5:29pm

    FYI, I had something happen today on this subject; It was rather amusing in the end; so I just had to share...

    I happend to be switching back and forth between ACM and APM codes today, just messing around with HK's GCS; and such. But at some point I noticed the airspeed sensor had stopped responding in the APM CLI test. Not really paying any attention, I couldnt say exactly when it had stopped working. It had me stumped for a bit, checking cables, voltages; and even to the point of removing it and putting it on another APM/OP I have... Long story short, but to resolve it (insert drum roll here) all I simply had to do was 1) RELAX; and 2) do a reset in setup mode; and all is better...

    Ya I know, I know; just fall back to basics...

    Did you plug it in (lol)

    Darren

    (PS I have a 5004 as well)

  • Distributor
    Martint BuildYourOwnDrone.co.uk January 2, 2011 at 2:09am

    Which air speed sensor are you using?  This one or This one

     

    If you are using the MPXV7002DP then check the following on your air speed sensor.

     

    No air pressure in pipes:


    Pin 2 & 3 = 4.9v
    Pin 2 & 4 = 2.46v
    Pin 3 & 4 = 2.42v

    Air pressure in bottom tube:


    Pin 2 & 4 = 4.8v
    Pin 3 & 4 = .03v


    Air pressure in top tube:


    Pin 2 & 4 = .03v
    Pin 3 & 4 = 4.86v


    I have shown the pin numbers on the file attached, the voltage did not change on pins 2 & 3 throughout the tests.

     

     

    3692145102?profile=original

    Please post back with the additional informtion.

     

    Kind Regards

     

    Martin.


    www.buildyourowndrone.co.uk

     

     

     

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