基于动态压差的卷烟小盒密封度无损检测方法的建立  

Nondestructive airtightness testing of cigarette packets based on dynamic pressure difference

作　　者：胡瑞林 孙悦 邱广阳 王爽 张齐 孙淼[3] 林苗俏 慎龙舞[1] 王乐[1] 鲁端峰[1] 李斌[1] HU Ruilin;SUN Yue;QIU Guangyang;WANG Shuang;ZHANG Qi;SUN Miao;LIN Miaoqiao;SHEN Longwu;WANG Le;LU Duanfeng;LI Bin(Zhengzhou Tobacco Research Institute of CNTC,Zhengzhou 450001,China;Longyan Tobacco Industrial Co.,Ltd.,Longyan 364021,Fujian,China;Hefei Institutes of Physical Science,Chinese Academy of Sciences,Hefei 230031,China)

机构地区：[1]中国烟草总公司郑州烟草研究院,郑州450001 [2]龙岩烟草工业有限责任公司,福建省龙岩市364021 [3]中国科学院合肥物质科学研究院,合肥市230031

出　　处：《烟草科技》2021年第4期89-95,共7页Tobacco Science & Technology

摘　　要：为解决现有卷烟小盒密封性检测方法中存在的测量精度低、破坏样品、耗时长等问题,建立了一种基于动态压差的卷烟小盒密封度无损检测方法。将卷烟小盒置于封闭负压体系使小盒内气体泄漏,实时记录封闭体系的压力变化曲线,采用伯努利方程对压力变化过程进行推导和拟合求解,通过获得有效泄漏面积用于表征卷烟小盒密封度。对该方法的准确性、重复性等进行测试,结果表明:(1)使用标准样品对该方法进行检验,测量结果与实际泄漏面积的相对误差均在1.1%以内,相对平均偏差在2%以内;(2)测试时间为7 s,封闭体系的初始压力为-3100 Pa时,检测效果最佳;(3)测定结果的变异系数在6%以内;(4)该方法与行业现行标准方法的相关系数R=0.987。该方法可为实现卷烟小盒密封度快速和无损检测提供支持。In order to test the airtightness of cigarette packets efficiently and accurately,a nondestructive,rapid and accurate test method was developed based on dynamic pressure difference.The cigarette packet sample was put into a closed negative pressure system to let the air leak from the sample,and the variation of pressure in the closed system was recorded realtimely.The Bernoulli equation was used to deduce and fit the variation process of pressure,and the obtained effective leakage area was used to characterize the airtightness of the sample.The accuracy and repeatability of the developed method were tested.The results showed that:(1)In the case of testing a standard sample,the relative error between the test result and the actual leakage areas was less than 1.1%and the relative mean deviation was less than 2%.(2)The preferable testing conditions were test duration 7 seconds and the initial air pressure in the closed system-3100 Pa.(3)The coefficient of variation of the test results was less than 6%.(4)The correlation coefficient between the developed method and the current industry standard method was 0.987.This method provides a support for the rapid and nondestructive testing of airtightness of cigarette packets.

关 键 词：卷烟 小盒密封度 有效泄漏面积 动态压差 无损检测 

分 类 号：TS439[农业科学—烟草工业]