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本文叙述从固定边界的圆形膜的振动理论出发，并通过各种实验，分析成品罐头真空度与顶盖 振动特性之间的关系，从而设计出一套电子线路对罐头真空度进行非破坏性鉴测。文中给出了仪器工 作原理，设计思想及实测数据．
This paper describes the vibration theory of a circular membrane with fixed boundary and analyzes the relationship between the vacuum degree of the finished can and the vibration characteristics of the roof through various experiments to design a set of electronic circuits for the nondestructive vacuum of the can Check. The article gives the instrument working principle, design ideas and measured data.