ZHANG Z W, YANG Y Q, YANG H K,et al.Study on infusion temperature control system based on adaptive fuzzy PID[J].Journal of Henan Polytechnic University(Natural Science) ,2023,42(3):137-145.

doi:10.16186/j.cnki.1673-9787.2023020054

Received:2023/02/17

Revised:2023/03/08

Published:2023/05/25

Study on infusion temperature control system based on adaptive fuzzy PID

ZHANG Zhongwei, YANG Yanqi, YANG Haikun

School of Physics and Electronic Information，Henan Polytechnic University，Jiaozuo 454000，Henan，China

Abstract:It is necessary to heat the infusion liquid to keep it within a certain temperature range in the cold season.According to the actual requirements of the infusion process，a temperature control system for infusion was developed based on adaptive fuzzy PID algorithm in this paper.Firstly，by analyzing the characteristics of infusion heating，the simulation toolbox of MATLAB/Simulink was used to build the infusion temperature control model of PID and adaptive fuzzy PID，and the simulation comparison experiments were carried out，which verified the superiority of the fuzzy PID algorithm for temperature control.Then，using STM32 microcomputer as the main controller，NTC thermistor as the temperature sensor，and combined with Peltier as the temperature control heating element，a hardware experimental circuit based on fuzzy PID algorithm was designed and implemented.The results showed that the fuzzy PID algorithm had the advantages of faster response and smaller overshoot compared with the PID algorithm，when the starting temperature was set at 15 ℃and the target temperature was set at 34 ℃，the fuzzy PID controller could reach stability at about 72 s，the maximum overshoot was 2.1%，the control effect was better than the traditional PID control algorithm.The proposed system had a good application prospect in the temperature control of infusion liquid.

Key words:fuzzy PID;temperature control;MCU;MATLAB simulation;automatic control technology

基于自适应模糊PID的输液温度控制系统研究_张中卫.pdf