音響を利用した容器内粉体レベルの測定（ガラスビーズを用いた基礎的実験と理論解析）

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  • Measurement of the Height for Granular Material Level in a Cylinder Using Sound (Fundamental Experiments for Glass Beads and Theoretical Analysis)
  • オンキョウ オ リヨウ シタ ヨウキ ナイ フンタイ レベル ノ ソクテイ ガラスビーズ オ モチイタ キソテキ ジッケン ト リロン カイセキ
  • Fundamental Experiments for Glass Beads and Theoretical Analysis
  • ガラスビーズを用いた基礎的実験と理論解析

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This paper deals with the development of a new method for measurement of the height for granular material in a cylinder. For monitoring of automated filling processes of cartridges in a series production a new measurement method was developed which allows to detect rapidly incorrect products and to improve the process capability by the use of this method. The aim of this research work is to measure the level of granular material in a cartridge without contacting the material. The material is the mixture of the solid particles and air. The material is assumed as the porous media from the viewpoint of acoustics. As that, the inside of the cartridge, which is filled with granular material, is the acoustic system including porous media. The measuring method used the relationship between amount of granular meterial in the cartridge and the characteristics of the transfer function of the acoustic system is developed. The acoustic characteristic of the granular material, which is used for the theoretical analysis was also measured.

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