This product is designed to be a low cost, automatic fever detector for stores, schools, and workplaces to help re-open safely during Covid-19.
It was produced by a team of 20 volunteer engineers through the Helpful Engineering non-profit organization.
We are looking for people to help!
Here is our Github:
Interested in manufacture. We are foot focus Podiatry we manufacture medical products tell me how I can get the details for manufacture?
brentradford:
Interested in manufacture. We are foot focus Podiatry we manufacture medical products tell me how I can get the details for manufacture?
In the Github file we have a bill of materials for the electrical components, designs to cut the plastic enclosure using a laser cutter, software, and more.
How many parts are you interested in producing? My team can potentially work with you to adapt the design to make it easy to produce, depending on the production volume.
I'll PM you my email address so we can talk further.
Hi ,i tried your firmware code and i notice that u dont calibrate the mlx90614 sensor, i am right???
beastks1:
Hi ,i tried your firmware code and i notice that u dont calibrate the mlx90614 sensor, i am right???
In this case the MLX90614 comes factory calibrated. As we further field test the devices, there may be a need to calibrate or account for other variables.
All thermopiles should be calibrated for use, as the infra red emissivity of materials is different, so the recorded temperature will be different. Similarly they generally work on a comparative value, so environmental condition also needs to be known to compare it with. So unless the sensor is calibrated for skin / humans, it'll need re-calibration.
I'm not familiar with the Melexis device, but in general our customers calibrate their own sensors for their use, as a generic calibration is just that, so a medical application (like this) there is a concentration of calibration points around the temperature of interest, as that's where you want the accuracy.
Neat project by the way, unsurprisingly you are not alone as others are working on similar, and as I write there is a global shortage of thermopiles right now with very extended lead times.
Like AmphenolSensor saids.
I have the same sensor here so i tried and to do some work and compare some values to make an aditional calibrate value to add to the result.
Just to give an example, if you are around 5 cm of distance, it need a 2.225 calibrate value(aproach, that would be more exact with more test). (with an emmisivity of 0.98, the human skin emissivity).
The way that i get this value was making between 10 and 20 test to one object that i know this emissivity and compare the average with the real value (comparing just with and comercial thermogun). If you have an object that gives you an controlled temperature is better)
Let me know if i was helpfull. 