If a person's temperature rises to 38 °C or higher, it is a symptom of a serious viral or bacterial infection.
Old-fashioned mercury thermometers are virtually indestructible.used, and digital versions can be expensive. The new FeverPhone app turns your smartphone into a thermometer without any additional hardware.
The researchers used thermistors, whichare used even in the most common smartphones to monitor the integrity of the internal components of the device, especially the battery. The same thermistors are used in clinical thermometers. They record the change in temperature when the thermistor comes into contact with the body.
Engineers realized that these sensors couldtrack the heat exchange between a person and his phone using the touch screen of a smartphone. First, they modeled a warm forehead with a plastic bag filled with heated water, pressing the screen against it. To collect data, engineers used three phone models: Google Pixel 6, Google Pixel 3 and Huawei P20. The collected data was embedded in machine learning models. According to the plan, temperature measurements will be taken based on how quickly the phone heats up and how much heat comes from the person who touches it. After the engineers collect enough data, they will calibrate the model to take into account the nuances of various phone accessories, such as screen protectors and cases.
So far, the experiment has shown that the FeverPhone test application estimated body temperature with an average error of about 0.23 ° C. which is within the clinically acceptable limit.
The researchers will continue to fine-tune the app's setup so that it works on other smartphones and smartwatches as well.
The research is published in Proceedings of the ACM on Interactive, Mobile, Wearable and Ubiquitous Technologies.
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