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IWR1642: The sensor sometimes lose sight of the detection target for only one frame.

user6316336
Prodigy 240 points
Part Number: IWR1642

Hello

The sensor sometimes lose sight of the detection target for only one frame.
The object is properly detected before and after this frame.
The detection target is a human, who walks between the sensor and a metal pillar.
When the sensor loses sight of the target, it detects a metal pillar that is easy to detect.

Is it possible to improve it so that the target is not lost sight of by changing any parameter?
We are trying to make RCS small in order to make it to detect even small reflections, and to increase the number of chirps in order to improve SNR. Are these good approaches?
Is there any other good way?

  • 0
    TI__Guru 50240 points

    Hi User,

    Can you specify which software you are running on your IWR1642 and also the chirp config you are using?

    Regards,

    AG

  • 0 in reply to Akash Gondalia
    Prodigy 240 points

    Hello

    SDK ver:02.00

    sensorStop
    flushCfg
    dfeDataOutputMode 1
    channelCfg 15 3 0
    adcCfg 2 1
    adcbufCfg -1 0 0 1 0
    profileCfg 0 77 287 7 200 0 0 20 1 384 2000 0 0 30
    chirpCfg 0 0 0 0 0 0 0 1
    chirpCfg 1 1 0 0 0 0 0 2
    frameCfg 0 1 16 0 40 1 0
    lowPower 0 1
    guiMonitor -1 1 1 0 0 0 1
    cfarCfg -1 0 0 8 4 4 0 5120
    cfarCfg -1 1 0 4 2 3 0 5120
    peakGrouping -1 1 1 1 1 255
    multiObjBeamForming -1 1 0.5
    clutterRemoval -1 0
    calibDcRangeSig -1 0 -5 8 256
    extendedMaxVelocity -1 0
    bpmCfg -1 0 0 1
    lvdsStreamCfg -1 0 0 0
    nearFieldCfg -1 1 1 255
    compRangeBiasAndRxChanPhase 0.0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0
    measureRangeBiasAndRxChanPhase 0 1.5 0.2
    CQRxSatMonitor 0 3 19 127 0
    CQSigImgMonitor 0 127 6
    analogMonitor 1 1
    sensorStart

    Best Regards

  • Former Member
    0 Former Member in reply to user6316336

    Hello,

    Can you try enabling clutter removal and seeing it that helps you detect the moving human and ignoring the metal pillar? Understand though that clutter removal means objects that are not moving will not be detected.

    Amanda

  • 0 in reply to Former Member
    Prodigy 240 points

    Hello
    Thanks for your comment.
    I want to detect both moving and stationary objects, so I think that method is difficult.

  • Former Member
    0 Former Member in reply to user6316336

    In that case you could use the advanced subframe mode and configure subframe 1 without clutter removal for static objects and then subframe 2 for moving objects.

  • 0 in reply to Former Member
    Prodigy 240 points

    I apologize for the late reply.
    Thank you for your answer.

    As suggested, I decided to use profile_advanced_subframe.cfg of SDK.
    In recordings using the two subframe configuration, I noticed that the target was frequently on and off in successive frames.
    Is each subframe output separately, as if it were an individual frame? I thought subframes are added to full frames internally, is that wrong?

    Is it possible that the target is too small and is frequently turned on/off in consecutive frames?

  • Former Member
    0 Former Member in reply to user6316336

    Hello,

    The thread has been continued here: https://e2e.ti.com/support/sensors/f/1023/t/912102

    I am going to close this thread.

    Amanda