Accurate Flexible Temperature Sensor Based on Laser-Induced Graphene Material

Huang Kun,Qiu Donghai,Mostafa Orban,Liu Bin,Yang Hongbo,Yiwei Wang

doi:10.1155/2021/9938010

Abstract

Body temperature is an essential physiological index reflecting human health. Accurate measurements of body temperature play a vital role in the diagnosis and treatment of diseases. In this paper, a temperature sensor manufactured by laser-induced graphene is introduced. This sensor has high measurement accuracy, simple preparation, and low production cost. The sensor is made of laser-induced graphene and is easier to fabricate and operate than traditional thermal resistance sensors. The sensor is of high accuracy, is easy to manufacture, and is of low cost. The sensor has high accuracy and is linear between 30°C and 40°C in the human body temperature ranges. Laser-induced graphene (LIG) sensor’s resistance value is correlated linearly with the temperature value, and compared with the infrared thermometer, the accuracy of the sensor is ±0.15°C while that of the infrared thermometer is ±0.30°C. The sensitivity of the LIG sensor is − 0.04145 % ° C − 1 .

Highlights

Body temperature measurement is an important physiological parameter that reflects the health of the human body, and its accuracy affects the diagnosis and treatment of diseases
Equipment used for measuring body temperature is mainly mercury thermometers and electronic thermometers [1, 2]
Due to the shortcomings of mercury thermometers, they are replaced gradually by convenient electronic thermometers [3]. e main types of current electronic thermometer sensors include platinum resistance sensors, integrated temperature sensors, thermocouple sensors, and thermistor sensors [4]. ese clinical thermometers are made of rigid materials which are prone to relative displacement with human skin during the measurement process. is relative displacement leads to inaccurate measurements and limits the application scenarios of body temperature detection. e flexible sensor uses materials similar to Young’s modulus of human skin

Summary

Introduction

Body temperature measurement is an important physiological parameter that reflects the health of the human body, and its accuracy affects the diagnosis and treatment of diseases. Equipment used for measuring body temperature is mainly mercury thermometers and electronic thermometers [1, 2]. E flexible sensor uses materials similar to Young’s modulus of human skin. Ese clinical thermometers are made of rigid materials which are prone to relative displacement with human skin during the measurement process. Is relative displacement leads to inaccurate measurements and limits the application scenarios of body temperature detection. E flexible sensor is used for daily personal health monitoring and treatment, human body temperature detection, and sports rehabilitation treatment [5,6,7,8]. Combining the skin is more stable, which greatly expands its application scenarios [9,10,11,12,13]

Results

Discussion

Conclusion