Study of a miniaturized sandwich-like CBT monitoring sensor

As one of the basic physiological parameters of the human body, core body temperature (CBT) reflects the level of human metabolism and is critical for clinical diagnosis of many diseases. The traditional method of CBT evaluation based on heat flux is susceptible to errors caused by the horizontal heat flow and the sensor usually has a large volume. This paper proposes a new miniaturized and easy-to-process sandwich-like CBT monitoring sensor, which minimize the influence of horizontal heat flow, based on an NTC temperature sensor and a heat flow sensor. The effectiveness of the CBT monitoring sensor was verified by FEM simulation and hot plate experiments, and the results showed that the sensor performs well in the human body fluctuation temperature range (36°C-38°C), with an error of ±0.01°C. The proposed prototype can continuously monitor temperature wirelessly, which promises a high-potential application prospect.