Product Showcase: SparkFun Pulse Oximeter and Heart Rate Sensor
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- เผยแพร่เมื่อ 11 ก.ย. 2019
- Find it here: www.sparkfun.com/products/15219
The SparkFun Pulse Oximeter and Heart Rate Sensor is an I2C based biometric sensor, utilizing two chips from Maxim Integrated: the MAX32664 Biometric Sensor Hub and the MAX30101 Pulse Oximetry and Heart Rate Module. While the latter does all the sensing, the former is an incredibly small and fast Cortex M4 processor that handles all of the algorithmic calculations, digital filtering, pressure/position compensation, advanced R-wave detection, and automatic gain control. We've provided a Qwiic connector to easily connect to the I2C data lines but you will also need to connect to two additional lines. This board is very small, measuring at 1in x 0.5in (25.4mm x 12.7mm), which means it will fit nicely on your finger without all the bulk. - วิทยาศาสตร์และเทคโนโลยี
Heart Rate Variability (hrv) is diagnostic. Could somebody make an library to visualize the hrv?
I've been trying to read data from this sensor for a week and I have had no luck. The connection shown in this video is very easy since you use the qwiic connectors. I am using the GPIO pins of the development board. I have 3 main questions:
1. How do I turn on the development board? How do I know it is on?
2. As soon as it is on, can I supply it I2C commands or do I necessarily have to configure something before hand?
3. Where can I find some source code in C used to communicate with this development board?
Thank you.
CORRECTION: 1:15 It doesn't bounce light off of your "arteries and arterials", it's "bouncing" it off of the hemoglobin molecules in your blood. (Sorry if my tone is grouchy, but I myself am grouchy.)
Please provide detailed description of connection and coding
Watch this tutorial, has all info:
th-cam.com/video/57PgD6ZSV4I/w-d-xo.html
Would it be possible to adapt this to a use a dog ear clamp? Same as the vets use.
Can anyone point me to a guide on how to hook up this breakout board to a breadboard. I am trying to use this board with the nrf2832 development board but I am having a hard time hooking it up. Thanks!
Hi, would this work if attached to the wrist? Or elsewhere on the body?
how do i make it work as a cardio watch? because when you place it at the wrist it gives no signal
Have you made it work now?
I've got a project that could use this but it can't go on an extremity. Will this work when applied to other parts of the body like the arm or the back?
These sensors will work on ear lobes too.
I don't know for sure, but the type used in the hospital must go on the finger where the appendage is more translucent. At least that is what I was told when I was in the ICU with one.
That's a good question. No, this particular sensor and the corresponding algorithm are specifically for a finger.
You could try it on ear lobe. Thats what the use in hospital if finger not a good location
Who wouldn't want to know their plethysmographic dynamic indices of respiratory-induced variation?
I'm actually curious what the difference is between this Maxim sensor and the one typically used in hospitals now. The one from the hospital looks like a weird LED with no other hardware, just a couple of wires coming out. It is issued in the hospital ICU to monitor blood oxygen while a patient is treated with opioids like morphine and dilaudid.
That's a good question. Though I haven't torn apart any medical devices, I do know that this particular chip (MAX30101) can be used in commercial designs - given that you can satisfy federal and medical requirements. Maxim integrated (the company that designed the chips) have some notes on how that's done directly on their site.
Tested this BOB out and ported the library to the nrf5 SDK. I was intrigued by the accuracy of the algorithms running on the MAX32664, comparing to a commercial pulse oximeter..
But there is one huge caveat: the chip is supposed to be ultra low power and for "mobile health" while actually consuming about 8mA in idle mode and the LEDs of the MAX30101 off! While operating and taking measurements the power consumption goes up to about 16mA or so. Not exactly low power I'd say. Those tiny 100mAh batteries typically found inside unobtrusive wearable designs won't last that long with this power consumption. And in the datasheet you don't find any clear info on power draw...a little intransparent.
But thumbs up for sparkfun for their effort creating this board and the library!
That's 12days on a 5000mAh battery?
I subscribe to this. It draws about 16-18mA using the max algorithm. Not low power at all. Have you found an alternative in the meantime or have managed to reduce the power consumption somehow?
Yes, hacking a commercial Oximeter like in the vids by Andreas Spiess
Can it read the HRV?
If accuracy is important for you, I would not choose this device for HVR. When you are looking for an accurate PPG heart rate sensor, take the Polar OH1 heart rate sensors with 6 LEDs. As far a accuracy is concerned, it has the accuracy of of ECG, which is the most accurate device available. Unfortunatley, Bluetooth low energy heart rate profiles for the the Polar OH1 do not transmit PPG raw data to calculate HRV. Adafruit gives a hint how this problem can be solved:
forums.adafruit.com/viewforum.php?f=65
what are the accuracy of these devices compared to the real hospital grade stuff?
I use this sensor for my project and it works as well. I compared to heart rate finger clip. I recommend this but I'm not sure for high-grade hospital.
@@kt-rin PPG signals can be use to calculate HRV and respiratory rate for instance in Matlab. But there is a problem with accuracy. Some of these PPG devices have a strong deviation from ECG devices, which are to most accurate heart rate devices available. But I don t know whether someone did a test of this device about the accuracy compared to a scientifically validated ECG device. Me personally, I came to the conclusion not to use such a PPG device for HRV measurement or respiratory rate estimation, but rather to use a device from Bitalino or Scott Hardens sound card ECG for this purpose.
You were a TV doctor , and now a sales person ... trump should hire you to find the whileblower with your lie detector tester ... but I think you need a fact detector to find the whistleblower ;)