Ultrasound bubble filter using the flexural vibration of a cylinder for an extracorporeal circulation circuit
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- 作者：Koji Mino ; Manami Kataoka ; Kenji Yoshida ; Daisuke Koyama ; Kentaro Nakamura ; Masayoshi Omori ; Shigeki Kawarabata ; Masafumi Sato ; Yoshiaki Watanabe
- 关键词：Bubble filter ; Flexural vibration ; Acoustic radiation force ; FEA
- 刊名：Sensors and Actuators A: Physical
- 出版年：2013
- 出版时间：1 September, 2013
- 年：2013
- 卷：199
- 期：Complete
- 页码：202-208
- 全文大小：2079 K
文摘
An ultrasound bubble filter without a mesh structure was developed for extracorporeal circulation. The filter utilizes an ultrasound standing-wave field generated by flexural vibration and removes micro air bubbles from the circulation. The ultrasound filter consists of an aluminum cylinder, two annular ultrasound transducers, and three connectors to the flow path. The configuration of the filter was determined through finite element analysis computations. Flexural vibrations at 46 and 199 kHz were generated in prototypes with lengths of 69 and 130 mm. Two driving modes (both standing-wave and traveling-wave modes) were used to evaluate the filtering characteristics in a water circulation system. The bubble size decreased by increasing the input voltage to the filter; the average diameter changed from 60 to under 10 ¦Ìm when the input voltage changed from 0 to 200 V. The total volume of air in the main flow estimated from the size distribution of the bubbles decreased to 1 % for the 130-mm-long filter excited with the traveling-wave mode.