• State TI Thinks Resolved
  • Locked Locked
  • Replies 5 replies
  • Answers 1 answer
  • Subscribers 30 subscribers
  • Views 421 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

IWR6843AOP: IWR6843AOPEVM: IWR6843AOP: Area scanner demo: Sometimes Dynamic objects that are not in the area are detected

ktt7321
Prodigy 140 points
Part Number: IWR6843AOP

Hello.

I am using the IWR6843AOP to evaluate the Area Scanner

There are no dynamic objects in the area,

However, the dynamic points are displayed in the range indicated by the area scanner.

I want to prevent dynamic objects that do not exist from being displayed in the Area Scanner.
What should i do?

best regards

  • 0
    TI__Expert 7510 points

    Hello,

    Are you using the default configuration file that is provided in the Industrial Toolbox, or have you made modifications?

    Best regards,

    Connor Desmond

  • 0 in reply to Connor Desmond
    Prodigy 140 points

    Hello,

    I'm using the following .cfg file.

    C: \ ti \ mmwave_industrial_toolbox_4_7_0 \ labs \ area_scanner \ 68xx_area_scanner \ chirp_configs
    area_scanner_68xx_AOP.cfg

    There is no change.

    Best regards,

  • 0 in reply to ktt7321
    TI__Expert 7510 points

    Hello,

    I would suggest lowering the CFAR threshold a bit.This will reduce the amount of dynamic points that are brought out, but if brought to low could effect how well the tracker algorithm performs.

    Please refer to the following resource about the CFAR CLI command:

    SDK User Guide:
    <MMWAVE_SDK_INSTALL_PATH>\docs\mmwave_sdk_user_guide.pdf

    Let me know if varying this threshold has any noticeable improvements in removing false dynamic points.

    Best regards,

    Connor Desmond

  • 0 in reply to Connor Desmond
    Prodigy 140 points

    Hello,

    I changed the CFAR in the range direction and evaluated the dynamic object,

    The changed parameters are as follows

    //  "cfarCfg -1 0 2 8 4 3 0 20 0",

    modify:"cfarCfg -1 0 2 8 4 3 0 25 0",

    False positives are a little less

    I don't know if it's due to the wind from the air conditioner,
    Dynamic object detection occurs.

    Please tell me the proper calculation method of this threshold value.

    Best regards

  • 0 in reply to ktt7321
    TI__Expert 7510 points

    Hello,

    There is no calculation specifically for the CFAR threshold. It is purely trial and error because every scene is different. The next thing I would suggest doing is applying a similar configuration to the OOB and see if you can visualize the same points in the OOB. Area Scanner uses the same processing chain that OOB uses minus 0th doppler objects aka dynamic points which you are interested in.

    I would also read up on the various CLI commands that are in the following resource and tune for your scene:

    SDK User Guide:
    <MMWAVE_SDK_INSTALL_PATH>\docs\mmwave_sdk_user_guide.pdf

    Best regards,

    Connor Desmond