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IWR6843AOPEVM: People detection at bore sight - what is the minimum distance and at what height

Krishna Kumar4
Expert 1565 points
Part Number: IWR6843AOPEVM
Other Parts Discussed in Thread: IWR1642

I recently watched the youtube marketing video for the 6843AOP webinar where it was claimed that people detection can occur at a maximum of 12m or 15m depending on whether MIMO or TX Beam steering is used.

My question is what is the minimum distance at which an adult can be unambiguosly detected by the AOP device at bore sight. What height should the AOP device be positioned to achieve this. Assuming it is NOT over head (i.e ceiling ) mounted.

  • 0
    TI__Mastermind 28055 points

    Hi Krishna,

    There is not a theoretical minimum range. Practically, a human should be 5cm away so that a large part of their body falls into the FOV of the device.

    However, if a person is very close to the device, they will obscure a large part of the devices FOV, and people or other objects behind them may not be seen.

    Regards,

    Justin

  • 0 in reply to Justin Curewitz
    Expert 1565 points

    Justin Curewitz said:
    However, if a person is very close to the device, they will obscure a large part of the devices FOV, and people or other objects behind them may not be seen.

    To avoid this the device is normally tilted and placed at a height similar to your IWR1642 people counting example, if it is at such a height say 3m on a wall, if the maximum distance of detection is 12m what will be the minimum distance. For a successful detection and tracking is there a field of view angle based on distance from the device. If there is any literature describing this FOV requirement.

  • 0 in reply to Krishna Kumar4
    TI__Mastermind 28055 points

    Hi Krishna,

    FOV of the AoP is 120 degrees x 120 degrees.  So you +- 60 degrees in both azimuth and elevation. If a person is in the FOV, allocation parameters can be tuned so that they are detected. Given the FOV, you can determine/calculate a mounting position so that the whole area of interest falls into the FOV.

    Regards,

    Justin