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IWR1443BOOST: Detection of peak of hard object when there are softer, less reflective objects in the path of radar

David Yates
Prodigy 20 points
Part Number: IWR1443BOOST
Other Parts Discussed in Thread: IWR1443, IWR1642

Hello-

I have an application where I need to measure the difference between a floor and a relatively hard football size and shape object (American football shape with a peak or crown on top). Sensor is located 2.5m above the floor and the football shape is in between the sensor and the floor. I want to measure difference in floor and the football rather than know the precise height of the sensor location.

The football may or may not have some less dense material on it (think hair) but I need to measure the hard surface and ignore the “hair”. I need the peak or crown measurement and must ignore any other features below that peak.

The floor position can be measured either at the same time as the football or previous measurements can be stored and referenced as a sensor height calibration. It is preferred to measure at the same time to avoid a calibration procedure.

I need ±2mm of resolution and ±4mm of accuracy as a minimum. Range of football height is 1m to 2.2m from floor. The output is a simple number representing the height of the football shape with respect to the floor displayed for the operator.

The environment is office or covered/protected outdoors. Football shape will be in view of the radar for several seconds and holding relatively still.

I presume I’ll need some sort of algorithm to discriminate the peak reflection of the hard surface.

Does anyone have experience with this kind of application? Would the IWR1642 or IWR1443 work for me?

Thanks!

David

  • 0
    TI__Guru 50240 points

    Hi David,

    I think mmWave Sensors are going to be very appropriate for your application. The main difference between devices is that the IWR1443 has an integrated Hardware Accelerator for FFT Processing whereas the IWR1642 has integrated DSP. For most customers the IWR1443 is more than sufficient unless you believe there is a reason you'll actually require the DSP.

    I'd also recommend looking at the high accuracy demo on the Resource Explorer

    Lastly if you are interested in imaging I'd recommend looking at the mmWave Cascade solution:

    Cheers,

    Akash

  • 0 in reply to Akash Gondalia
    Prodigy 20 points

    Thanks, Akash! I'll give those a read. Sounds like I need to buy a dev kit.

    Any issues going with the DSP version if I find that I don't need it? 

    Cheers,

    David