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
Key words
STM32/three wire PT1000/ratio-based temperature measurement/LTC2983 digital temperature measurement chip
维普
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