Development of a noninvasive powder level switch by acoustic method

Akihiro Ooshima; Kazuyuki Kobayasi; Kajiro Watanabe

doi:10.11499/sicep.2004.0_22_5

SICE Annual Conference 2004

DOI https://doi.org/10.11499/sicep.2004.0_22_5

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Host: The Society of Instrument and Control Engineers

Co-host: The IEEE Industrial Electronics Society, The IEEE Robotics and Automation Society, The IEEE Control Systems Society, The IEEE Systems, Man and Cybernetics Society, The Instrumentation, Systems, and Automation Society

Development of a noninvasive powder level switch by acoustic method

*Akihiro Ooshima, Kazuyuki Kobayasi, Kajiro Watanabe

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Pages 22

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Abstract

Various physical phenomena can be used to measure the powder level in a storage tank. This paper describes an accurate, novel and method employing acoustics to measure the amount of powder in a tank. The proposed method employs a probing pipe in a small loudspeaker. We catch a change of acoustic impedance of opening of a pipe. Change in acoustic impedance produce an output signal.

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