基于STM32的化学发光免疫分析仪温控系统的设计与应用  

Design and Application of Temperature Control System for Chemiluminescence Immunoassay Analyzer Based on STM32

作　　者：李中伟 王聪 吴晓磊 乔美英[1] LI Zhongwei;WANG Cong;WU Xiaolei;QIAO Meiying(School of Electrical Engineering and Automation,Henan Polytechnic University,Jiaozuo,Henan 454003,China;Autobio Labtec Instruments Co.,Ltd.,Zhengzhou,Henan 450016,China)

机构地区：[1]河南理工大学电气工程与自动化学院,河南焦作454003 [2]安图实验仪器(郑州)有限公司,河南郑州450016

出　　处：《自动化应用》2024年第4期69-72,77,共5页Automation Application

摘　　要：在全自动化学发光免疫分析仪检测样本的过程中,温度的变化会显著影响样本与试剂化学反应的速度和结果,影响仪器检验结果的可靠性,因此,亟需高精度的温度控制系统。对此,研究了一种以STM32微处理器为核心的控制电路,选用三线制PT1000温度传感器和LTC2983数字温度测量芯片,设计了比率式测温电路,同时采用光耦驱动MOS管的方式进行驱动控制。结果表明,该温度控制电路具有较高的稳定性,且测量准确度能达到±0.1℃,满足全自动化学发光免疫分析仪上的温度要求。In the process of detecting samples using a fully automated chemiluminescence immunoassay analyzer,temperature changes can significantly affect the speed and results of chemical reactions between samples and reagents,affecting the reliability of instrument test results.Therefore,a high-precision temperature control system is urgently needed.A control circuit with STM32 microprocessor as the core was studied to address this issue.A three wire PT1000 temperature sensor and an LTC2983 digital temperature measurement chip were used to design a ratio based temperature measurement circuit.At the same time,an optocoupler was used to drive the MOS transistor for control.The results show that the temperature control circuit has high stability and measurement accuracy can reach±0.1℃,meeting the temperature requirements of the fully automatic chemiluminescence immunoassay analyzer.

关 键 词：STM32 三线制PT1000 比率式测温 LTC2983数字温度测量芯片 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置]