Subcategories

• PX4 Autonomy Developer Kit

  Product related questions and answers

  6
  Topics
  40
  Posts

  M

  @Eric-Katzfey
  Hi,
  The first change of flight mode to "Altitude" was because of the loss of control of pilot (see it from the "Manual Control Output") on the drone.
  This wasn't happened first time, I experienced the same before this flight too.

  The steps you provided aren't suitable, I can't do the flights like "Manual" and then verify everything everytime, this is a random behavior, even if I try in the manual mode and get a good flight, I can still experience the bad flight afterwards.

  When I get the bad VIO data, I get the message of "invalid setpoints" in the log and over the QGC too and the drone goes into the "altitude" mode.

  But, the problem I shared here is the loss of control over the drone, drone kept going upwards and even pulling the throttle to "0" isn't bring the drone to ground.

  You can clearly see, even in the altitude flight mode (2nd time), the drone still kept going upwards at "0" throttle.

  Please get us a fix for this.

• VOXL Accessories

  Microhard Modems Cellular Modems Power Modules Image Sensors
  156
  Topics
  825
  Posts

  A

  @dlee ,

  Yes the new TOF sensor (IRS2975C) is more powerful that the previous generation. What I mean by that is that it can emit more IR power but also heats up more. Emitting more power allows the sensor detect objects at larger distances or objects that are not as reflective.

  In current operating mode, the auto exposure control is enabled inside the sensor itself, which modulates the emitted IR power based on the returns that the sensor is getting. That is to say, the power draw will vary depending on what is in the view of the sensor. If there are obstacles nearby, the output power should be low, otherwise it can be high. At full power, the module can consume close to 0.8-0.9W

  So the first solution, if design allows, is to add a heat spreader to dissipate the heat, which you already started experimenting with. The sensor has a large exposed copper pad in the back for heat sinking purposes for this exact reason. Just be careful not to short this pad to anything, use non-conducting (but heat transfering) adhesive pad between the sensor and heat spreader.

  In terms of a software solution to the issue, we can query the temperature of the emitter. We can also control the maximum emitted power used by the auto exposure algorithm. That is to say, still leave the auto exposure running in the sensor, but limit the maximum power that it is allowed to use.

  We are planning to add some software protection that limits the maximum output power as a function of the emitter temperature. This will require some implementation and testing.

  Meanwhile, please consider using a heat spreader, which will be the best solution if you want to make use of the full sensor's operating range and not have our software limit the output power in order to prevent overheating.

• VOXL Compute & Autopilot

  Product related questions and answers

  VOXL 2 Mini VOXL 2 VOXL Flight VOXL Flight Core v2 Flight Core VOXL 2 IO Flight Core - ArduPilot
  756
  Topics
  3821
  Posts

  M

  Hi,

  I'd like to use OpenCV in a ros2 node on a Voxl2 (SDK 1.1) platform. I'm trying to figure out how to do this, based on the instructions here it seems like I have to use a docker image to get access to opencv? Are there any examples of using OpenCV in a ros2 node outside docker?

  Thanks!

  Update: I seem to be able to to compile a ros2 node using the following code, is this expected to work? Wanted to make sure so I don't land up getting segfaults down the line...

  In the .cmake file add

  find_package(OpenCV REQUIRED) include_directories(/usr/include/opencv2/)

  and then in the cpp code include it using

  #include "opencv2/opencv.hpp"
• VOXL Dev Kits

  Product related questions and answers

  VOXL-CAM VOXL Flight Deck
  152
  Topics
  684
  Posts

  A

  @viralp , please let us know what camera you are actually connecting to the extension cable, which camera connector on VOXL2 you are using (J6, J7, or J8 and which part (upper or lower)).

  https://docs.modalai.com/voxl2-camera-configs/#overview

  Also which VOXL2 SDK you are using. Thanks.

  Alex

• VOXL Dev Drones

  Product related questions and answers

  Starling Sentinel VOXL m500 Reference Drone Qualcomm Flight RB5 5G Drone Seeker
  345
  Topics
  1855
  Posts

  E

  @kgn-mdlai Is HITL interesting for your purposes? https://docs.modalai.com/voxl2-PX4-hitl/

• ESCs
  54
  Topics
  456
  Posts

  R

  @Alex-Kushleyev Thanks Alex, We will test it out. In the meantime my team will be sending the first FPV 4n1 ESC back, so you can investigate onsite.

  Thank you,
  RDJ