MWH05a-21 Temperature sensor and camera feedback channel for thermal camera calibration

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MOW, Wai Ho(@eewhmow)
January 19, 2022 2:43 pm

Fig 3 shows an e-ink display, correct? Have you verified that the displayed QR code can be decoded 2m away?

CHAN, Ho Lam(@hlchanap)
January 19, 2022 2:49 pm
Reply to  MOW, Wai Ho

We bought a 1.54inch e-ink display as a prototype at first, we recently bought a larger e-ink display but it is shipping. We have experimented with the larger e-ink display which can easily read the QR code from 2 meters away.

MOW, Wai Ho(@eewhmow)
January 19, 2022 2:54 pm
Reply to  CHAN, Ho Lam

Got it. Thanks!
How to verify that your temperature sensor is indeed accurate?

FOK, Hiu Fung(@hffok)
January 19, 2022 3:05 pm
Reply to  MOW, Wai Ho

We are now using LM75 as our thermal sensor which allows 2 degrees Celsius error and it is not accurate enough for now. We are now purchasing new sensor TMP116 which we found it has 0.2 degrees Celsius accuracy on its data sheet. We will test again and compare with other medical temperature device later.

MOW, Wai Ho(@eewhmow)
January 19, 2022 3:19 pm
Reply to  FOK, Hiu Fung

Yes, testing is a must. In the end, the prototype should benchmark the accuracy against that of a blackbody calibrator-based system.

LO, Kin Shing(@ksloaf)
January 19, 2022 3:38 pm
Reply to  MOW, Wai Ho

can we borrow the camera for further stage since we can use the camear in desktop to dectect the qrcode.

MOW, Wai Ho(@eewhmow)
January 19, 2022 3:49 pm
Reply to  LO, Kin Shing

Sure, let’s confirm by email instead of messaging here.