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IWR1443: Detecting water on the floor

Hayden Kim
Genius 15580 points
Part Number: IWR1443

With mmWave radar water detecting solution, can I know the feasibility of below use case?

 

* Radar sensor on a small Robot

* Usually it runs on dry floor

* While moving, he wants to detect water drop on the floor to avoid the water

So, can you check the feasibility of this mmWave radar application of detecting water on the floor?

What will be the most challenging thing for this application?

Best regards,

Hayden

  • 0
    TI__Mastermind 30405 points

    Hi Hayden,

    We have the Water vs Ground Lab available on TI Resource Explorer. This lab demonstrates a preliminary way to classify between water and ground using mmWave, based on the phase difference caused by fine ripples in water. However, this lab is only a proof of concept and requires the EVM to be stationary. Further development would be needed to get it working on a moving platform.

    We haven't tested the scenario you highlighted but a potential classification algorithm may be able to use the following:

    1. The presence of water on floor would cause change in reflectivity (intensity of the reflected signal) as compared to the floor.

    2. If there is movement in water (e.g. due to air currents or floor vibrations), it would also introduce phase variations in the reflected signal which could be used to differentiate it from a static surface. This is demonstrated in our Water vs Ground Lab as mentioned above.

    3. As compared to floor, water will also cause fluctuations in the reflected signal (RCS fluctuations) which could be be used as another input to the classifier.

    Regards

    -Nitin