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IWR6843AOPEVM: Vital Signs With People Detection Limit

Camila Grubb
Prodigy 30 points
Part Number: IWR6843AOPEVM

Tool/software:

Hello, I'm trying to run the Vital Signs people tracking lab using the IWR6843AOPEVM radar board with the BOOST, I contacted TI before about the lack of accurate heart rate numbers so I was instructed to use the the 1_30_01 visualizer version for better results.

For context, I am also using the vital_signs_AOP_6m.cfg. I'm getting vital signs data, the visualizer shows the red box delineating a person moving within the large blue box delineating I'm assuming the range. As soon as the subjects I'm testing walk outside 20 feet of the radar, the red box disappears, however, vital signs are still being shown as collected despite no red box or cloud point activity being noticeable in the blue box range. 

Why am i still getting these detection and output? If this is something that has to be fixed in the configuration of the board itself, can you explain where that would be and what are the changes?

A follow up question - is there a TI radar board that could detect more than 2 person's vital signs?

  • 0
    TI__Genius 11750 points

    Hi

    The blue box is the boundary within which a person can be tracked and the tracking details are sent to the vitals chain for measurement. Red box indicates that a person is successfully tracked. As you move beyond 20 feet, you would be outside of the 6m blue box where the track gets lost. Once the track is lost, there is no validity for the vital signs result. This will have to be corrected in the demo. It seems some invalid data is sent to the vitals chain when the track is lost. This needs to be addressed in the demo code and no change on the board itself is needed. Please do note that, beyond 6m, accuracy of vitals decreases and cannot be relied upon. Hence, the demo is limited to 6m

    Currently, we do not have a demo which can measure 2 person's vital signs. It might be possible to measure 2 person's vitals with duplicating the vital chain but you will not be able to extend it beyond 2 persons as you would run out of memory and mips

    Regards