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

    ToF Performance Degrades as CPU heats up

    Image Sensors
    3
    3
    202
    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.
    • R
      Rowan Dempster
      last edited by 28 Mar 2024, 15:15

      Hi,

      I'm seeing degraded ToF performance when the CPU is operating at 60C versus 40C. Degraded means fewer point returns, at less of a max distance. Is this the expected behavior of the sensor?

      System details:

      • ToF: M0040-1 (Legacy TOF)
      • VOXL2
      • voxl-camera-server version 1.8.4
      • System image: 1.7.1-M0054-14.1a-perf-nightly-20231009
      • Kernel: #1 SMP PREEMPT Tue Oct 10 03:21:29 UTC 2023 4.19.125
      M 1 Reply Last reply 28 Mar 2024, 18:11 Reply Quote 0
      • M
        Moderator ModalAI Team @Rowan Dempster
        last edited by 28 Mar 2024, 18:11

        @Rowan-Dempster On the ground it's helpful to point a cheap desk fan at the drone while developing and debugging. Once it's in the air, there is unlimited airflow and things will cool down quickly.

        A 1 Reply Last reply 28 Mar 2024, 18:58 Reply Quote 0
        • A
          Alex Kushleyev ModalAI Team @Moderator
          last edited by 28 Mar 2024, 18:58

          if CPU was causing the issue, then you would see slower FPS, not degraded performance.

          This sounds like the actual TOF sensor is heating up and at some point starts throttling itself by reducing the emitted power, which helps cool it down.

          You could test it by selectively cooling TOF sensor (and not voxl) and see if performance goes back up.

          1 Reply Last reply Reply Quote 0
          1 out of 3
          • First post
            1/3
            Last post
          Powered by NodeBB | Contributors