There exists some problems in measuring the temperature distribution in cigarette burning cone with fine-thermocouples, such as inaccurate thermocouple positioning, thermocouple damaging, tested cigarette distortion and out-of-step between data acquisition system and smoking machine. Therefore, a measuring system was developed by incorporating modularized fine-thermocouple, cigarette pre-perforating with reflective light positioning, insertion depth controlling with micrometer caliper, etc. The results of application showed that: 1) The cigarette distortion and fine-thermocouple damage were reduced. 2) The axial and radial positions of thermocouples in tested cigarette were well controlled, and the control precision increased from 0.5 to 0.01 mm. 3) The synchronization of cigarette puffing and data acquisition was linked up by means of a negative pressure trigger, and the repeatability of test results was improved. The system is flexible in operation and features high automation, the effects of subjective factors are effectively reduced, and working efficiency is improved.%卷烟燃烧锥内部温度分布检测采用的微细热电偶检测技术,存在热电偶定位不准确、热电偶易折损、被测卷烟易变形、数采系统与吸烟机不同步等问题.为此,采用微细热电偶模块化、烟支反射光定位预打孔、螺旋测微器控制插入深度等技术,研制开发了卷烟燃吸过程温度分布检测系统.应用结果表明:①烟支反射光定位预打孔技术和热电偶模块化设计,降低了操作过程中对被测卷烟造成的变形和微细热电偶的损伤；②螺旋测微器进位装置对热电偶模块插入烟支内部的轴向和径向定位,提高了热电偶检测位置的准确性,控制精度由0.5 mm提高到0.01 mm；③通过负压联动机制实现了卷烟抽吸与数据采集同步,提高了检测结果的重复性.该检测系统操作灵活,自动化程度高,有效降低了人为因素的影响,提高了工作效率.
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