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IWR1443BOOST: IWR1443BOOST

peter mccormick
Expert 1110 points
Part Number: IWR1443BOOST
Other Parts Discussed in Thread: IWR1443

We have almost finished our tank level product and software.

We are trying to simulate tank level measurement using water or oil.  Peanut oil has the same dielectric constant of 2 as motor oil and cleaner to work with.  Water=80.  We will test on a customer water or oil tank if we feel comfortable that it will work.

It appears as if the IWR1443 "sees" the metal behind the water or oil rather than the desired water or oil bottle since the metal plate has infinite dielectric constant.

Is it realistic to see oil or water with a metal bottom in the tank?  Have you tried this?

The 1443 seems to show 3meter when closer than about 2ft from the target.  What is the closest that the target can be?  It seems that it would work at about 10 inches in the past.

Thanks, Peter

  • 0
    TI__Guru 50240 points
    Hi Peter,

    What kind of results do you get without the backdrop? You ought to zoom into the range profile to see what the peaks look like at different ranges, the scale you have is far to large for this purpose.

    mmWave Sensors are definitely appropriate for level sensing in metal tanks. One other facet you can consider is to ignore peaks at distances that are longer than the bottom of your tank.

    Were you seeing the same results for both water and peanut oil?


    Cheers,
    Akash
  • 0
    Expert 1110 points

    Zooming in shows that the curve starts at exactly 1m.  It is as if the Chirp config file or a parameter set this min distance.  This is simply pointing at the office wall at any close distance.  It is stuck at 1m. 

    Your tank level video seems to show values all of the way to 0 and definitely working at .3m .

    Is this a different lab or a different config file?  We use the config file that came from the high accuracy lab.  Please send a config file that would work if possible.   This test uses the 1443 but we we have both eval boards and will be using the 1642.

    lab  .

    1m standoff from the liquid will not work for tank level so hopefully, you can send another config file which will fix the problem.  Thanks

  • 0 in reply to peter mccormick
    Expert 1110 points
    Akash, Shaun got it to work. It seems the default config was setting it to ignore values below 1m. He made a simple change to the config in the source code and now it will read as close as about 1.5 cm so all good for now. Thanks
  • 0 in reply to peter mccormick
    TI__Guru 50240 points
    Glad to hear that Peter!

    If you have more questions then feel free to open up a new thread!


    Cheers,
    Akash