IWR6843ISK: Static detection of people

Larry Koudele

Part Number: IWR6843ISK

Tool/software:

It seems that only doppler information is used, so that if a person stops completely, the point cloud data stops coming back. We can identify people versus static objects by the fact that a person gives back many closely grouped points, and static objects don't. So, using the mmWave Sensing Estimator, is there a way to get back static information? I assume that might be a binary load? What would that be? I just want to go out about 10 meters maximum, but see point clouds of static people all the time, moving or not moving.

Regards and thanks in advance,

Larry

4 months ago

0 Nathan Block 4 months ago

TI__Mastermind 37805 points

Hi,

You can disable the static clutter rejection in the configuration file if you want to detect stationary objects.

Best,

Nate

0 Larry Koudele 4 months ago in reply to Nathan Block

Intellectual 310 points

Thanks! I tried that and it did work. Next, how to make the smallest movement of a person detected. What cfg for that? Up to 10 meters, but 5 to 7 for now.

Regards,

Larry

0 Nathan Block 4 months ago in reply to Larry Koudele

TI__Mastermind 37805 points

Hi Larry,

You may need more link budget for that. Consider decreasing your sampling rate or increasing the # of chirps.

Best,

Nate

0 Larry Koudele 4 months ago in reply to Nathan Block

Intellectual 310 points

If I used the area_scanner binary and configs, assuming no static objects were added to the scene. Only people walking into the scene, and then stopping. Would that stopped person show up as a static object? I assume static objects in the TLVs are only those added to a scene after the first 15 frame calibration? So, continuing in this vein, a person walking into an already calibrated scene would be a dynamic object, but then if stopped, would become a statice object. Then walking again would become a dynamic object again? Please clarify. Thanks.

0 Nathan Block 4 months ago in reply to Larry Koudele

TI__Mastermind 37805 points

Larry Koudele said:
Would that stopped person show up as a static object?

Potentially if they stand very very still, but likely their movement just from standing and breathing will be enough to call them non-static.

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IWR6843ISK: Static detection of people