Solid polymer electrolyte membrane flow sensor for tracheal tube

Tadashi Ihara; Yoshito Ikada D.V.M.; Taro Nakamura; Toshiharu Mukai; Kinji Asaka

doi:10.1117/12.658928

30 March 2006 Solid polymer electrolyte membrane flow sensor for tracheal tube

Tadashi Ihara, Yoshito Ikada D.V.M., Taro Nakamura, Toshiharu Mukai, Kinji Asaka

Proceedings Volume 6167, Smart Structures and Materials 2006: Smart Sensor Monitoring Systems and Applications; 61670U (2006) https://doi.org/10.1117/12.658928
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2006, San Diego, California, United States

Abstract

Solid polymer electrolyte membrane (SPM) acts not only as an actuator but as a small, voltage generating, and fast response sensor. Sensing characteristics of SPM as applied to a flow sensor for a ventilator was studied. SPM was prepared by chemically plating with gold on the surface of Nafion membrane. A new technique using Nafion R-1100 resin was applied to fabricate SPM with an arbitrary thickness between 200-1000 μm. Flow sensing unit and signal amplifier was constructed to measure the induced voltage by bending SPM with air-flow from the ventilator. Induced voltage by SPM ranged 1-100 μV over a ventilator air-flow range of 20-100 L/min. SPM sensor showed linear increase of induced voltage by the increase of flow. This relationship was tested over a range of SPM thickness, length and width. The result was compared with an electro-mechanical coupling model of SPM transducer: data showed consistent result on the relation between the induced voltage and membrane length and thickness while a discrepancy was observed in the relation of membrane width and induced voltage. The result, however, was consistent with the assumption of capacitive component model.

Citation Download Citation

Tadashi Ihara, Yoshito Ikada D.V.M., Taro Nakamura, Toshiharu Mukai, and Kinji Asaka "Solid polymer electrolyte membrane flow sensor for tracheal tube", Proc. SPIE 6167, Smart Structures and Materials 2006: Smart Sensor Monitoring Systems and Applications, 61670U (30 March 2006); https://doi.org/10.1117/12.658928

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