ModalAI Forum
    • Categories
    • Recent
    • Tags
    • Popular
    • Users
    • Groups
    • Register
    • Login

    Native Barometer and GPS height estimation bad

    PX4 Autonomy Developer Kit
    3
    5
    379
    Loading More Posts
    • Oldest to Newest
    • Newest to Oldest
    • Most Votes
    Reply
    • Reply as topic
    Log in to reply
    This topic has been deleted. Only users with topic management privileges can see it.
    • Jeffrey MaoJ
      Jeffrey Mao
      last edited by

      Hi Modalai,

      Recently we tried flying with the native barometer/recommended 3DR GPS on the website and found the performance was quite bad comapred to other products

      https://www.modalai.com/products/m10000640

      Do you have any suggestions on how to improve them or an alternative product to do no Vision based height estimation

      Eric KatzfeyE 1 Reply Last reply Reply Quote 0
      • Eric KatzfeyE
        Eric Katzfey ModalAI Team @Jeffrey Mao
        last edited by

        @Jeffrey-Mao You shouldn't have an issue with the barometer. But the GPS does suffer performance issues due to it's plastic mount, proximity to WiFi antenna, and proximity to RC antenna. We are currently designing a new way to mount things such that the GPS performance does not suffer so much.

        Jeffrey MaoJ 1 Reply Last reply Reply Quote 0
        • Jeffrey MaoJ
          Jeffrey Mao @Eric Katzfey
          last edited by

          @Eric-Katzfey thanks for the quick response. Yeah personall we ended up mounting the GPS further up with a pole in a custom design. Do you guys have a link to the px4 parameters you use with the barometer onboard the Voxl2 or does it need some sort of calibration?

          Eric KatzfeyE VinnyV 2 Replies Last reply Reply Quote 0
          • Eric KatzfeyE
            Eric Katzfey ModalAI Team @Jeffrey Mao
            last edited by

            @Jeffrey-Mao We haven't had problems with the barometer nor have I heard of any users having an issue with it. It does not need any calibration. Are you using it on a custom drone? If so, do you have a way to shield it from sunlight? That is a common issue with barometers, they are sensitive to sunlight. Can you share a log file when it is performing poorly? You could also add a distance sensor to your drone.

            1 Reply Last reply Reply Quote 0
            • VinnyV
              Vinny ModalAI Team @Jeffrey Mao
              last edited by

              HI @Jeffrey-Mao
              Another consideration for baro is active airflow. We typically provide a "cap" on our baros in our drones or flight-decks to ensure it is not exposed to sunlight (as Eric stated) but also active airflow which can show up like air pressure noise.
              Our 3D models repository has a 3D file of this cap, in this case for FlightCore to give you an example:
              https://storage.googleapis.com/modalai_public/modal_drawings/Flight_Core_Barometer_Cap.STEP
              Hope this helps.

              1 Reply Last reply Reply Quote 0
              • First post
                Last post
              Powered by NodeBB | Contributors