| 食品罐头内真空度的无损检测 |
| |
| 引用本文： | 黄光周,蔡德全. 食品罐头内真空度的无损检测[J]. 华南理工大学学报(自然科学版), 1987, 0(4) |
| |
| 作者姓名： | 黄光周 蔡德全 |
| |
| 作者单位： | 华南工学院无线电工程系，华南工学院无线电工程系 |
| |
| 摘 要： | 至少有十种方法可用来检测食品罐头内的真空度。本文特别介绍一种扫频式电磁场声电检测法。这种方法的原理如下;扫频式电磁场作用于罐头的罐盖而使之振动,振动的音响由一个电探头所检测。研究已经表明,罐盖的振动的自然频率与罐内的真空度有关,自然频率随真空度的升高而增加。本文论述这种方法和装置的详细结果。
|
| 关 键 词： | 真空测量 无损检测 食品包装容器 |
NONDESTRUCTIVE TEST OF VACUUM IN THE FOOD CANS |
| |
| Huang Guangzhou and Cai Dequan Dept.of Radio Eng.,South China Inst.of Tech.. NONDESTRUCTIVE TEST OF VACUUM IN THE FOOD CANS[J]. Journal of South China University of Technology(Natural Science Edition), 1987, 0(4) |
| |
| Authors: | Huang Guangzhou Cai Dequan Dept.of Radio Eng. South China Inst.of Tech. |
| |
| Abstract: | There are at least ten methods in which it is desirable to testthe gas pressure within a closed food container.This paper descri-bes particularly the frequency-scanning electromagnetic fieldacoustic testing.The working principle of This method is strikinga can lid with a frequency-scanning electromagnetic field to causethe can lid to vibrate and thereby generate an acoustic ping whichis sensed by an electrical pickup device.It has been found thenatural frequency of the lid bears a relation to the degree ofvacuum in the can,the natural frequency rises with the increasein vacuum.The detailed results of this method and apparatus arepresented in This paper. |
| |
| Keywords: | vacuum measuring non-destructive tests food containers |
| 本文献已被 CNKI 等数据库收录！ |
