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IWR1443BOOST: How to make sure IWR1443boost is capturing heart data?

Arjun Kumar
Prodigy 175 points
Part Number: IWR1443BOOST
Other Parts Discussed in Thread: IWR1443

Hi,

I read in the vital signs demo manual that the respiration rate decreases and reaches to zero when the breath is held for a few seconds. This shows that the radar is placed in the right place and captures the respiration data. However, it does not make sure it captures heart data. I faced an issue where radar captured the respiration data but was not able to capture heart data. 

How to make sure the radar is capturing heart rate? 

Regards

Arjun

  • 0
    TI__Genius 10730 points

    Hi Arjun,

    Are you saying that you do not see the heart rate data displayed when the breath rate goes to zero?

    Thanks,

    Angie

  • 0 in reply to Angie Mitchell
    Prodigy 175 points

    Hi,

    No, I am asking whether TI engineers are sure that if a person's breath rate goes to zero during holding a breath also represents the presence of heart rate. If not, then whats the sign to check heart data is being detected by the radar?

    Based on my research experiences using different company radars, I found that detection of breath rate does not guarantee the detection of breath rate in spite of the company's claim to detect heart rate. See the below image. I collected the data using an ECG sensor and radar. Then I plotted the data into the frequency domain, you can see frequencies of ECG and radar at different locations. As per the Fourier series, each frequency appears with a single peak in the frequency domain. 

    The orange color signal is an ECG signal, and the blue is a radar signal. The X-axis represents time and Y axis power.

    Since I wasted my long time. I wanted to make sure whether TI radar captures heart data. Hope you understand.

    Regards

    Arjun

  • 0 in reply to Arjun Kumar
    TI__Genius 10730 points

    Hi Arjun,

    We verify the accuracy of our heart rate data by comparing with heart rate measuring devices such as pulse oximeters. We find that our heart rate estimates are +/- 5bpm in accuracy in our latest labs. We see an improvement in our heart rate data form our IWR1443 device when it is used with a radar lens to focus the signal onto the heart.

    Thank you,

    Angie

  • 0 in reply to Angie Mitchell
    TI__Genius 10730 points

    Hi Arjun,

    I notice you are making multiple threads about the same topic, vital signs with our mmwave devices using the DCA1000. Can you please consolidate all these threads into one thread on the topic? 

    Please see our e2e guidelines: https://e2e.ti.com/support/site-support-group/site-support/f/site-support-forum/693054/faq-what-are-the-guidelines-for-posting-on-e2e-support-forums 

    If you keep making multiple threads a day on this topic we may need to take action. Duplicate threads and questions will be removed. 

    Thank you,

    Angie