IWR1642BOOST: Occupancy plus vital signs detection for 3 zones

Hi,

I can check with another member of my team to see if we know whether the HW is capable of such a use case. In the meantime, what modifications have you made to the code to support this? This may involve some heavy modifications so it would be good to understand what you have changed so far.

Best Regards,
Alec

Hello Alec,

Thank you so much for your response! Sure, that would be great to know if the HW is capable of this use case. 

I am summarizing the modifications made to the code to support 3 zones:

1. Occupancy detection - Zone position adjustment was performed to rearrange the zones using "ZoneDef"; Zone Calibration to modify the configuration file parameters, running the application, and calibrating the coefficients by running the given batch file for coefficient generation, replacing the new "coeffMatrixRow", "meanVector" and "stdVector" into the chirp configuration file.

2. Vital Signs Detection - In order to extend the support of vital signs to 3 zones, after obtaining the required chirp configuration for 3 zones, modifications of the firmware and MATLAB GUI are required to return Zone 3 results. 

2.1 Firmware - 

• • To initialise Zone 3 and its properties:
    • filepath: C:\...\src\occupancy_plus_vital_signs\src\dss\ dss_main.c
  • The high level flow of the algorithms can be found in the function MmwDemo_interFrameProcessing(), in the file dss_data_path.c.
  • It controls the heatmap processing, occupancy decision, and vital signs processing. 
    • filepath: C:\...\src\occupancy_plus_vital_signs\src\dss\ dss_data_path.c

 2.2 Matlab GUI - 

• • Modify the file vod_vital_signs.m to introduce the third zone
  • For instance,
    • create a new row for Zone 3
    • increase decisionValue and extractedValue array size
    • update the Zone 3 value and plots respectively
  • filepath: C:\... \occupancy_plus_vital_signs\gui\ vod_vital_signs_3zone.m (Newly created 3 Zone vital signs monitoring)

Please do feel free to reach out to me in case of any further clarifications. I am eagerly looking forward to your guidance and support in this endeavour!

Thank you in advance.

Warm Regards,

Adharsh

Adharsh,

I have discussed this with someone from my team, and while there is no physical limitation preventing this from being possible, I believe that you may encounter data quality issues. I'm happy to answer any questions that you may have, just be aware that this may be a use-case that requires 2 devices. 

Now, when you said you were only receiving data for 2 zones, do you mean that in a literal sense that there is no output for this zone, or that you do see data here, just not data that looks like how you expect?

Best Regards,
Alec

Hello Alec,

Thank you so much for the response! What do you mean by a use-case that requires two devices? Is it like using a DCA1000 EVM along with the IWR1642? 

There was no output for the 3rd zone, I was simultaneously only able to receive vital signs for 2 zones at a time. 

Warm Regards,

Adharsh

Alec,

I understand, thank you for the clarification. I will certainly try that out. In my specific use case, I am trying to use a single IWR1642 to simultaneously collect vital signs for more than 2 different zones. I just want to know if that is possible or not? (Using just a single IWR1642)

I would really appreciate your answer. 

Warn Regards,

Adharsh