文章摘要
吕海峰,牛凯强,刘静,耿彦章.软包装液体体积测量技术[J].包装工程,2016,37(7):61-65.
LYU Hai-feng,NIU Kai-qiang,LIU Jing,GENG Yan-zhang.Measurement Technology for the Volume of Liquid in Soft Package[J].Packaging Engineering,2016,37(7):61-65.
软包装液体体积测量技术
Measurement Technology for the Volume of Liquid in Soft Package
投稿时间:2015-11-13  修订日期:2016-04-10
DOI:
中文关键词: 软包装  体积  测量  噪声
英文关键词: soft package  volume  measurement  noise
基金项目:国家自然科学基金 (51305409);山西省青年科技研究基金 (2013021020-2);山西省高等学校优秀青年学术带头人计划
作者单位
吕海峰 中北大学太原 030051 
牛凯强 中北大学太原 030051 
刘静 中国兵器工业第五九研究所重庆 400039 
耿彦章 中北大学太原 030051 
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中文摘要:
      目的 实现软包装内液体体积的快速、 非侵入测量。方法 在研究亥姆霍茨共振器原理的基础上, 分析共振腔体积改变对声学系统的影响; 采用Virtual Lab软件对所设计的测试系统进行仿真计算, 求取传递损失最大值频率与被测液体体积的关系; 搭建软包装液体体积声学测试系统, 采用Labview软件对管道入口、 出口处的声音信号进行采集; 采用声波分解法对信号进行分析, 得到声学系统的传递损失。结果 测试结果表明, 软包装内液体体积由25增大至200 mL时 (即共振腔腔体体积减小), 测试系统传递损失的峰值所对应的频率由256上升至278 Hz。实验结果与仿真结果具有相同的趋势; 系统的灵敏度为7.4 mL/Hz。结论 所设计的基于亥姆霍茨共振器理论的声学测试装置可以实现对软包装液体体积的测量。
英文摘要:
      This study was aimed to measure the volume of liquid in soft package in a fast and non-invasive manner. Based on the research of theory of Helmholtz resonator, the effect of resonator cavity volume on the acoustic system was analyzed. The Virtual Lab software was used to simulate the measurement system designed, and the relationship between the maximum frequency of transmission loss and the detected volume was obtained. The acoustic testing system for the volume of liquid in soft package was established and the Labview software was applied to acquire the acoustic signals at inlet and outlet of the tunnel. The acoustic decomposition method was used to analyze the signals acquired and the transmission loss of the acoustic system was obtained. The test results indicated that when the volume of liquid in the soft package increased from 25 to 200 mL, and the frequency of maximum transmission loss increased from 256 to 278 Hz. The experiment and the simulation possessed the same trend and the sensitivity of the measuring setup was 7.4 mL/Hz. In conclusion, the acoustic measurement system based on the Helmholtz resonator can be used to measure the volume of liquid in the soft package.
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