High-Precision Temperature Sensor System With Mercury-Based Electromagnetic Resonant Unit

Temperature sensing based on emerging techniques, such as the novel electromagnetic resonant unit, has been the vital research direction. However, current works only focused on the initial and principal verifications, and it is far away to the real application. In this article, a temperature sensor based on mercury-inspired electromagnetic resonant unit holding high- Q -factor and with complete circuit system is proposed. The excellent properties of mercury, including the liquid-shape, highly conductivity, and high-temperature sensitivity, are utilized to achieve the effective fusion of such liquid material and high- Q -factor electromagnetic resonant unit, so as to realize the integrated design of high-precision temperature sensing. Furthermore, four functional circuits, including signal generation, temperature sensing, signal reception, and signal processing, are designed and constructed, and finally an integrated mercury-inspired electromagnetic resonant-unit temperature sensor system with good temperature sensing performances is realized. Experimental results show that the temperature measured by the proposed sensor is highly consistent with the actual temperature values, with sensing sensitivity up to 1459 mV/ C-degrees. Such achieved high-precision temperature sensor system can be further integrated and can open a new way for the high-precision environment temperature monitoring in the Internet of Thing (IoT) area.