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IWR1443BOOST: IWR1443Boost high accuracy

Glen Kalchbrenner
Prodigy 30 points
Part Number: IWR1443BOOST
Other Parts Discussed in Thread: IWR1443,

Hello,

              We are in the process of evaluating the IWR1443 76-81GHz FMCW Radar senor for use in both liquid and solids level sensing and have performed tests with both high and low dielectric from water to oil, cereal, sand, and others. Compared the results of IWR1443BOOST with an existing 80GHz FMCW Radar level sensor already on the market and provided the test result comparison file for your reference. The IWR1443 (without lens) performed very well using the High Accuracy precompiled firmware and High Accuracy Visualizer utility to measure wave forms and peaks. What we found in comparing the radar sensor already on the market was the linearity of the measurements were considerably more consistent than the IWR1443BOOST. We are looking for your recommendations regarding how to improve the accuracy similar to the application note for the 100meter tank with mm accuracy and some additional questions provided below. Please see attached files with comparison tests and general test setup. Any help you can provide would be appreciated.

 

  1. Do you have any lens/antenna recommendations for the IWR1443BOOST demo board which would help improve accuracy and effectiveness of the signal? Please provide manufacture and part number? Does TI offer any assistance for the development of lens or antenna?
  2. In the software are there any additional measures that can be adopted or currently exist that would improve the accuracy? Sweep of frequencies and power output variances which may help detect and provide for false signal suppression, and optimization for various dielectric constants within the 77-81GHz frequency range?    
  3. What measures can be taken to insure optimum signal to noise ratio?
  4. What settings in the configuration would help improve the accuracy beyond the results found in tests with 2000ml beaker and 135gallon plastic tank? Any recommendations would be greatly appreciated.

 

Please let me know if you have any questions or need additional information.

Link to test file comparison

https://drive.google.com/drive/folders/14eHC8ShLAXhw_hEPJSJZViIc6fvBqK9V?usp=sharing

Thank you very much for your time,

Glen Kalchbrenner

  • 0
    TI__Guru 50240 points

    Hi Glen

    Thank you for your interest in mmWave Sensors. What are the accuracy and power requirements of your application?

    To answer your questions:

    1. Our systems team has done some measurements with this lens. The Gain achieved with the lens gave a theoretical maximum distance of more than 250 meters but the efficacy has not been tested. If you are interested in testing with this particular lens then let me know, that particular lens might be too large, heavy, and expensive for a variety of products. Otherwise we can recommend a third-party to assist with lens design.

    2. There is a High Accuracy Lab which leverages a Zoom FFT technique to provide accuracy on the level of about 1 mm. Though I believe the maximum distance is limited to about 20 meters.

    3. In what regard are you asking about optimal SNR? There are a multitude of factors that affect SNR. Measurement against a highly reflective surface (water or metal) with minimal vibration and disturbance.

    4. The best way to improve accuracy is going to be with your setup. Can you confirm that your sensor is perfectly level? Can you confirm the sensor is fixed? Also can you confirm that there are no disturbances from vibration or the wall of your tank? All of these are factors that should be considered first and foremost.

    Regards,

    AG

  • 0 in reply to Akash Gondalia
    Prodigy 30 points

    Hi Akash,

                  Thank you very much for your reply. Regarding the lens we will purchase the one you had referenced for testing purposes however if you had any third-party recommendations, we would appreciate it. The 135gallon plastic tank was purchased new for testing purposes and no imperfections were seen. Several mounting positions were tested however will create a new setup with lens and secure in a fixed position. Additional testing will be performed with the lens. If we can achieve the 1mm or below this would be a very good starting point.

     

    Thank you very much for your time,

    Glen Kalchbrenner