音響を利用したシートの枚数検出法 : 第5報, 布の音響特性を利用した非接触測定(<小特集>音響利用技術-音響情報・音響エネルギー-)

概要

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This paper deals with the development of a new method for detecting the number of cloth without contact. It is necessary to detect one or plural number of sheets to avoid mishandling. This detecting sensor utilizes the variation of the phase of the transfer function within entire acoustic system. The incident impedance of sheets varies with the number of sheets. Characteristic acoustic impedance and complex wave number define peculiar and most fundamental characteristics of the material. It is useful for the detection of the number of cloth to know characteristic impedance of cloth. So that, we tried to measure characteristic impedance and wave number. The measured impedance of sheets by the transfer function method was introduced into theoretical analysis. The results of the experiments and theoretical analysis show fairly good coincidence
社団法人日本機械学会の論文
2001-05-25