• State
  • Locked Locked
  • Replies 6 replies
  • Subscribers 33 subscribers
  • Views 385 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

IWRL6432: IWRL6432 vs IWR6843 vitals monitoring accuracy

Weng Fei Low
Prodigy 50 points
Part Number: IWRL6432
Other Parts Discussed in Thread: IWR6843, ,

Tool/software:

According to https://dev.ti.com/tirex/explore/node?node=A__ALC14b17ULt9epE62168yw__radar_toolbox__1AslXXD__LATEST and https://www.ti.com/lit/ml/slyp920/slyp920.pdf?ts=1755494237804&ref_url=https%253A%252F%252Fwww.google.com%252F, IWR6843 has a measured heart rate error of ±5bpm and breath rate error of ±2bpm, and IWRL6432 has an expected heart rate error of ±10bpm and breath rate error of ±4bpm. I'm looking at these two chips for vitals monitoring, hence I'd like to understand what is the reasoning behind the expected 2x reduction of accuracy for IWRL6432 compared to IWR6843. 

  • 0
    TI__Intellectual 780 points

    Hello!
    We are looking into your query. Please allow us some time to respond.
    Thanks.

  • 0 in reply to Saransh Gautam
    TI__Genius 12160 points

    Hi 

    IWR6843 is a high performance sensor with 3Tx and 4Rx wile IWRL6432 is optimized better low power performance with 2Tx and 3Rx.

    More number of Tx/Rx in IWR6843 provides better detection capability compared to IWRL6432. Do note that source code is available in Radar tool box for IWRL6432 Vitals demo while only binary is shared for IWR6843

    Regards 

  • 0 in reply to Abhishek Karkisaval
    Prodigy 50 points

    Hi Abhishek,

    Thanks for the reply. I understand that increasing the number of TX/RX results in an increased angular resolution & SNR, but I don’t quite understand how that helps in increasing the heart/breath rate estimation accuracy by 2x.

  • 0 in reply to Weng Fei Low
    TI__Genius 12160 points

    Hi

    Vitals determination is based on estimation of fine chest movements of the person. Increased angular resolution helps in precisely locating the chest region and higher SNR helps in better estimation of the frequency corresponding to breath and heart rate. This results in better accuracy

    Regards

  • 0 in reply to Abhishek Karkisaval
    Prodigy 30 points

    I am trying to the same for small animals like a mouse/rat, standing still within 1-5mtrs, can I detect the sub milliliter level shifts caused during contractions while breathing to know the respiratory rate, and which dev kit I should buy, cause DAC1000 is quite costly for me know, I am confused with IWRL6432 and IWRL6432 both have "AOP" and "BOOST" evm boards which one should I buy, also i saw that the IWRL6432 does have a lot of examples.

    Please help me select a dev kit, which i can use to get the data and train/deploy a custom detection algorithm [not on board, I will be using a PC for compute] and I dont have the budget for DAC1000EVM

  • 0 in reply to Shubham Jena
    TI__Genius 12160 points

    Hi

    You can buy IWRL6432AOPEVM. There is no need to buy DCA1000. DCA1000 is used to capture raw ADC data. There is option to get the raw ADC data using the SPI interface of IWRL6432AOPEVM. So, DCA1000 is not needed. Vitals demo will work on IWRL6432AOPEVM but do keep in mind that animal BR/HR is not same as Human HR/BR interms of number of breaths and number of BPM. This demo is optimized for humans which can detect upto 110BPM

    Regards