Fever testing: Wearable device could make process faster and cheaper

Ryan Farrel/Research Communications

Public temperature checks have become a common practice across the world during the COVID-19 pandemic, and researchers at Texas A&M University are working to make it possible to conduct the test across a large group of people quicker and less expensive than current methods. 

Choongho Yu, professor and Sallie and Don Davis ’61 Faculty Fellow II in the J. Mike Walker ’66 Department of Mechanical Engineering, is working alongside his students to harness the thermal energy generated by body heat to power a small, self-sustaining electronic device capable of detecting fever in its wearer. 

If successful, Yu said such a device could benefit a large number of people — especially when implemented in a public setting — by quickly and efficiently identifying fever.

“The fever detector can be distributed to many unspecified people at public places at a low price, and this technique could be helpful in the early and fast detection of fever commonly observed from a viral infection such as COVID, SARS, MERS and swine flu,” Yu said. 

Graduate student Yufan Zhang, who works with Yu on the project, said that while fever detection can serve as an effective way to minimize viral transmission during a pandemic, a cheap, visible and self-sustainable technique is needed to accomplish this goal.

“Thermal energy scavenging shows great potential since an output voltage can be obtained by a temperature difference supplied by the fever,” said Zhang. “To visualize the temperature changes, an electrochromic fever detector has been fabricated and connected to the thermal energy harvester.”

Using new principles of thermo-hydro-electrochemical energy conversion, Yu and his team are working to develop an effective method of providing charge to their fever detection device by harnessing the thermal energy typically wasted by its user via the corrosion properties of carbon steel electrodes.

“Our device is based on carbon steel corrosion to generate voltage and current,” Yu said. “The lifetime of our device depends on the speed of the corrosion process.”

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