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IWR1642: mmWave sensor radar based Close Range distance measurement

Part Number: IWR1642
Other Parts Discussed in Thread: IWR6843ISK

We seek to use a radar based sensor (mmWave?) to very accurately, and very regularly measure distance to a small target object that will slowly grow in distance over time.  Desired range is about 4 - 6 inches.  Desired accuracy of +/- 0.005 inch.  Again, our objective is to simply accurately measure linear distance.  Perhaps the mmWave series of sensors may be overkill, but we believe we need a radar based solution (so the sensor can be shielded from contamination within a nonmetallic case, and not be affected by other environmental factors such as magnetic fields, air movement, etc.)

  • Our question / request is, can an mmWave device do this?, and can it's field of view be tuned to very narrow?  If so, which one is advised?  Is there perhaps a more direct/simple radar based IC solution?

  • Hi Charles

    mmWave Sensors can detect objects in close space with an accuracy of better than 1 mm. The desired range should not be an issue since minimum detection range is about 2.5 inches.

    To learn more about this I would recommend ordering and IWR6843ISK EVM and running the Out of Box Demo. Then I would recommend running the High Accuracy Lab which demonstrates sub-mm measurement using the zoom FFT technique.

    Regards,

    AG