Comments (2)
I don't think that it's possible to measure 'blood flow' with the Pulse Sensor. The Pulse Sensor functions as a PPG sensor. It measures the relative change in tissue density on the site under the sensor. So it depends on the site as to what kind of density change you will get.
Also, the Pulse Sensor is not a calibrated device. There may be great variation between different Pulse Sensors!
If you are curious about how the Pulse Sensors you have correlate to each other, try putting them on the same body site and see how the signal may or may not differ. That might be a simple way to get closer to a kind of calibration, even if you just understand how the difference is on different parts.
But again, I am concerned that the premise of your post. Do you have any data on how a PPG can be used to measure volume of blood flow?
from pulsesensorplayground.
Thanks so much for your response. If we are looking at the difference in tissue density, would increased blood flow to that area result in a change there? Is there a relationship between tissue density and the amplitude of the signal?
And as for figuring out the variation between our two sensors, that is a great idea, thank you. We will try that out and figure out if there may just be some inherent difference between the signal even if placed in the same location.
from pulsesensorplayground.
Related Issues (20)
- Getting BPM to Monitor not Working on Arduino Nano 33 BLE Sense?? HOT 11
- Arduino Pro mini 3V 8MHz - Pulse sensor connected on port A1 - ONLY NOISE HOT 24
- PulseSensor Playground downloaded by Arduino doesn't work properly for Arduino Nano 33 BLE HOT 5
- Can't acquire .sawStartOfBeat() HOT 19
- Adafruit Feather M0 WiFi with uFL - ATSAMD21 + ATWINC1500 - fw 19.4.4 HOT 8
- Generating RMSSD and SDNN from IBI, BPM data HOT 2
- Adafruit Feather nRF52832 Compatibility? HOT 4
- Do we need to set THRESHOLD twice when we use 2 pulsesensors at once? HOT 2
- USE_ARDUINO_INTERRUPTS problem with NodeMCU 0.9 HOT 3
- GETTING STARTED WORKING BUT NOT GETTING BPM TO MONITOR HOT 5
- Quick question, my smart meter has a pulse HOT 1
- Getting_BPM_to_monitor sketch displaying random values at 11250 baud HOT 8
- Node MCU V1 - Plotter is working but no BPM in Monitor HOT 3
- I'm getting high BPM HOT 1
- Code error for sp32 pulse sensor data to thinspeak HOT 19
- Compatibility issue Nano BLE ABX00034 HOT 6
- PulseSensr_BPM_Alternative Compilation Errors HOT 7
- turning off/on the bright light when needed HOT 2
- Can't compile even when including "USE_ARDUINO_INTERRUPTS true" HOT 14
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from pulsesensorplayground.