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IWR1443: Vital sign demo long distance

Akito Maruo
Prodigy 20 points
Part Number: IWR1443

Hi, exparts:

 

I have a question.

We are evaluating a vital signs demo by using IWR1443 EVM. Since with default setting when I sit far from EVM more than about 1 meter, GUI shows “Breathing Rate” is zero. I would like to get breathing rate at  2 - 3 meters far from EVM.

 

In order for that, I modified profile_2d_VitalSigns_20fps.cfg file as below.

 

Original:

profileCfg 0 77 7 6 57 0 0 70 1 100 2000 0 0 40

 

Modified:

profileCfg 0 77 7 6 57 0 0 20 1 225 4500 0 0 40

 

But GUI still shows “Breathing Rate” is zero when I sit far from EVM more than 1m.

Could you show me what parameters we modify in .cfg file?

 

Regards.

Akito

  • 0
    TI__Mastermind 28177 points

    Hi Maruo-san,

    You also need to modify the range in the vitalSignsCfg command of the configuration file. For a 2–3 meters range, this would be:

    vitalSignsCfg 2 3 512 512 0.5 0.05 0.05

    If you are curious about the meaning of the parameters in this command, please refer to vitalSigns_cli.c:VitalSignsDemo_CLIvitalSignsParamsCfg().

    I am unsure you need to modify the chirp parameters when you want to modify the range. For my part, I have only changed the vitalSignsCfg parameters.

    Note the biggest challenge for the setup is that the person's chest needs to be the most reflective target in the radar field of view. So it needs to be clear of all very reflective objects such as metallic furniture. I have been using a dielectric lens to focus the radar beam, and this let me measure the breathing rate at 4 meters.


    Thanks,
    François.

  • 0 in reply to Francois Charlot
    Prodigy 20 points
    Hi François,
    Thank you for your answer.
    I could run the system even 2-3 meters away.

    Regards.
    Akito
  • 0 in reply to Francois Charlot
    TI__Guru 50240 points
    Thank you very much for your response Francois! It is very much appreciated!

    Akito, if there are no more questions I am going to close this thread. Feel free to open up another!


    Cheers,
    Akash