Micro-condensation sensor for monitoring respiratory rate and breath strength
Micro-condensation sensor for monitoring respiratory rate and breath strength
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DOI：
10.1016/j.sna.2012.08.001
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发表时间：
2012-10-01
影响因子：
4.6
通讯作者：
Wrobel, Z.
中科院分区：
文献类型：
--
作者：
Janik, P.;Janik, M. A.;Wrobel, Z.
人体呼吸监测提供了大量有关身体状况的信息。呼吸频率超出正常范围可能是严重疾病的症状，也是住院治疗的指征。本文提出了一种传感器，该传感器能够监测呼吸频率，这是由于呼气过程中传感器表面的蒸汽颗粒微凝结导致输入和输出电极之间的耦合发生变化。供电信号（低频范围内的直流或交流）的幅度决定了输出信号的最大幅度。微冷凝传感器（MCBS）采用PCB技术制成，其表面覆盖有可用的防腐剂，这在很大程度上增加了MCBS对呼吸的敏感性。当相对湿度超过 75% 时，传感器电容的变化达到 0.5 nF/%RH。传感器在每分钟几次呼吸到 240 次呼吸的频率范围内进行测试。选择如此广泛的频率是为了确定传感器的灵敏度及其在不同环境下的运行速度。 (C) 2012 Elsevier B.V. 保留所有权利。
Human breath monitoring provides a lot of information about the condition of the body. Respiratory rate which is beyond the norm can be a symptom of a serious disease and an indication for hospitalization. This article presents a sensor which enables monitoring of respiratory rate owing to the change of coupling between input and output electrodes caused by the micro-condensation of vapour particles on the sensor surface in the process of exhaling air. The amplitude of a supplying signal (DC or AC in the range of low frequencies) determines the maximum amplitude of the output signal. The micro-condensation sensor (MCBS) was made in PCB technology and its surface was covered with an available antiseptic which increases MCBS sensitivity to breathing to a great extent. With relative humidity exceeding 75%, the change of the sensor capacitance amounts to 0.5 nF/%RH.The sensor was tested within the frequency range of several to 240 breaths per minute. Such a wide range of frequencies was chosen in order to determine the sensor sensitivity and the speed of its operation in widely different circumstances. (C) 2012 Elsevier B.V. All rights reserved.