Breathing Measurement error

Discussion in 'Respiration Sensor' started by Igor.12, Oct 17, 2018.

  1. Igor.12

    Igor.12 New Member

    Hello,

    I have a X4M200, and I can not detect breathing as good as in the demo video.
    It wasn't working as good as it should in the last version, so I have already upgraded the firmware right now and tried again and still not working.

    What am I doing wrong? The place had no moving objects or person while it was loading and than after the scanning finished i walked to close to the sensor and sitted in a chair in front of it and it wasnt able to track my breathing continually.. the sensor has no case, nothing blocking the Antenna..


    I attached the paste generated using xethru explorer recording option

    Thank you,

    Igor
     
  2. NSANGOU CHOUAIBOU

    NSANGOU CHOUAIBOU Active Member

    Hi Igor,
    I have played back your recorded respiration data. First of all, make sure that your sensor is not attached to any vibrating or slightly shaking support. The best position is having the sensor antennas pointing directly towards your chest. Then stand still for a while to let time to the sensor to lock onto your respiration instead of tracking movement. The sensor can't track random movement and respiration simultaneously.

    Best regards,
    Chouaibou.
     
    Last edited: Oct 18, 2018
  3. Igor.12

    Igor.12 New Member

    Hello Chouaibou,

    Thank you for your attention,

    It is attached in my static table in my room.

    Yes it is in the right way I followed as the datasheet describe, to not use the opposite site pointing to me
    Yes, I also did it. My procedure was: Turned on xethru explorer taping mode>leaved the room>waited the first scan finished> walk back to the run> sitted in my chair in front of the sensor, someting like 60cm-100cm (I didnt measured the exact distance)..

    So that's why I came here.. because I don't have idea what may be happening..
    Someone already got this problem? how should I fix it?

    B.R.

    Igor
     
  4. NSANGOU CHOUAIBOU

    NSANGOU CHOUAIBOU Active Member

    Hi Igor,
    If your detection zone settings are correct and your chair is in the detection range of the sensor, just let the sensor finish its initialization (~ 2 min) and when frame counter starts, you can sit still at the right place and just breathing without any movement.
    Your sensor is trying to lock into your respiration as the record shows, but there is a perturbating movement, may be your arms moving ? Another trick may be the antennas side of the sensor, make sure that the antennas side of your sensor is facing you.
    Note : Don't forget to select adult respiration profile.

    B.R,
    Chouaibou.
     
    Last edited: Oct 18, 2018
  5. Igor.12

    Igor.12 New Member

    Dear Chouaibou,

    You are very active in the community,

    I am not trying to cheat against the sensor!
    I waited the initialization time, out from the detection zone.
    then i stay sitted in my chair staticly, just breathing.. and it doesnt is working..

    I tried it with both frequency and yes, I am an adult.. so I choosed it and I also tried both options: feature optimized and memory optimized.

    I searching if someone had this problem and how I should proceed to solve it. I think is something with pulse doppler some times it graph doesnt load (yes sir, I have marked it in the configurations) .

    Now I also tried hold my breathing and sometime it don't detected me..
    Is an abnormal behavior (it should keep tracking movements by heart beats)....

    I tried with other USB cable and other port and didnt work..

    My doubt is if am I able to reset the sensors embeded firmware or when I updated the xethru explorer FW 1.6.8 is already the x4m200 embedded firmware update
     
  6. NSANGOU CHOUAIBOU

    NSANGOU CHOUAIBOU Active Member

    Hi Igor,
    I am sorry your are struggling with your sensor. Someone had the same problem and I help him as I am doing with you.
    Please can you try with python codes examples to test your X4M200 sensor ?

    B.R,
    Chouaibou.
     
    Last edited: Oct 18, 2018
    Charlie Shao likes this.
  7. Charlie Shao

    Charlie Shao Moderator Staff Member

    Hi Igor,
    According to your description, I did not find anything mishandled obviously.

    Your recording does show output RPM on some periods. I assume you want to repeat this demo: , which shows continue RPM output perfectly. To be honest,
    it is hard to achieve this when you are sitting on a chair or even lay down. If your application has high requirement for continually real-time RPM output, this sensor may not be an option. It mainly targets for sleep analysis products, which use both RPM and Movement data logged by the sensor.

    Pulse doppler doest provide outputs on memory-optimized profiles. It only available on feature optimized profiles
    .
     
    NSANGOU CHOUAIBOU likes this.
  8. Igor.12

    Igor.12 New Member

    Oh okay,
    Yes.. I was trying to get an output like yours, that the distance was fixed in the breathing without big fluctuation..

    I thought it should be easier in a normal scene to track the breathing, reproducible for all..

    P.s. I changed now I/O PIN control to default it start to work better.. Sorry my ignorance, what means this option? input/output pin control? It change the way that the sign is filtered?
    Does someone have some hint about to remove multipath and scene from raw data?

    Thanks both Chouaibou and Shao.

    B.R.

    Igor
     
    Last edited: Oct 19, 2018
  9. NSANGOU CHOUAIBOU

    NSANGOU CHOUAIBOU Active Member

    Hi Igor,
    Please take a look at this thread for I/O pin explanation :
    https://www.xethru.com/community/threads/next-x4m200-firmware-update-date.318/#post-1478

    Removing multipath and scene from raw data is not an easy task. First identify clusters in order to remove unwanted scatterers !
    There is a simple adapdative clutter map filter in distance demo example (https://www.xethru.com/community/resources/xep-x4-distance-demo.89/) , but it is a very basic and simple example.
    IEEE publications can help you to have an overview of the state of art in this field.

    Best regards,
    Chouabou.
     
    Last edited: Oct 22, 2018