直热式毛细管柱升温系统的设计  

The Design of Resistive-Heating System for Capillary Column

作　　者：张轩朗[1] 邹莹畅[1] 张希[1] 陈辰星[1] 安超[1] 王平[1] 陈星[1] 

机构地区：[1]浙江大学生物医学与仪器科学学院,生物传感器国家专业实验室,杭州310027

出　　处：《传感技术学报》2013年第7期912-916,共5页Chinese Journal of Sensors and Actuators

基　　金：国家自然科学基金项目(81201166);教育部博士点基金项目(20120101120165)

摘　　要：介绍了一种满足快速气相色谱要求的直热式毛细管柱升温系统的设计方案。采用毛细管柱直接通直流电加热的升温方法,铂电阻恒流源三线制测量温度,PID算法计算PWM波占空比对加热功率进行控制。最后得到最快可在30 s内将毛细管从室温加热到稳定的200℃,升温速率从1℃/s到10℃/s可调节,控温精度0.2℃,低功耗,可满足便携式快速GC要求的毛细管柱升温系统。This article introduces a design of resistive-heating system for capillary column used in fast gas chromatography （GC）. Direct Current was applied to the capillary column for heating. 3-wire platinum resistor and constant current source were used for the temperature measurement. The heating power was controlled by a PWM actuator using a PID algorithm. Eventually the heating system can heat the capillary column from room temperature to 200℃ at a rate from 1 ℃/s to 10 ℃/s. The temperature precision is 0.2 ℃. And the system is portable and low power consumption, which can meet the requirement for fast GC.

关 键 词：快速GC 直热式 三线制铂电阻测温 PID算法 

分 类 号：TH833[机械工程—仪器科学与技术]