3827 クランプオン型超音波流量計における板波を用いた高精度流量測定

概要

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This paper describes a high accuracy flow rate measure method in clamp-on type ultrasonic flowmeter. A path, so called "mean flow rate path" is a key compornent in high accuracy flow rate measurement. When a plate thickness is very small, ultrasonic is transmitted by Lamb wave in a condition that ultrasonic must be all reflected on surface by Snell's law. So in clamp-on type ultrasonic flowmeter, we can use a mean flow rate path and we can do high accuracy flow rate measurement. A characteristic of Lamb wave depend on a frequency of ultrasonic and a plate thickness. When a plate thickness is large, ultrasonic is transmitted by contorol of a frequency.
一般社団法人日本機械学会の論文
2000-07-31