Design and research of gate infrared temperature measurement system for human body

Abstract

When COVID-19 and other major epidemics break out, all kinds of crowded places, such as railway stations, bus stations, high-speed railway station and other public places, need to measure the temperature of people coming and going to eliminate potential safety hazards. In the face of such a huge group, the traditional measurement method can no longer meet its needs, but needs a more efficient and faster way to measure. In addition, in such special circumstances, it is necessary to carry out non-contact temperature measurement to reduce the risk of infection. To solve the above problems, a gate-type infrared temperature measurement system for human body is designed. The single-chip microcomputer and infrared temperature measurement technology are studied, and the principle and implementation scheme of the gate-type human body infrared temperature measurement system based on single chip microcomputer are expounded. In addition, a simple gate-type human body infrared temperature measurement system based on STC89C52RC single chip microcomputer is specially designed. According to the principle of realizing functions, the system is mainly composed of four parts, namely, STC89C52RC single-chip microcomputer control module, Mlx90614 infrared temperature measurement module, LCD1062 liquid crystal display module and buzzer indicator light alarm module. The principle of the system is as follows: firstly, the human body temperature signal and the ambient temperature signal are collected by the Mlx90614 infrared temperature measurement module. After the A/D converter inside the Mlx90614 infrared temperature measurement module performs A/D conversion on the body temperature signal, the STC89C52RC single-chip microcomputer performs processing and analysis on the digital signal. Finally, the surface or ambient temperature of the human body is directly read from the LCD1602 display screen, and the single-chip microcomputer judges whether the temperature reaches the alarm limit or not.