Deng Fucheng, Ye Lingyun, Song Kaichen
College of Biomedical Engineering and Instrument Science, Zhejiang University, Hangzhou 310027, China.
Sensors (Basel). 2014 Jun 12;14(6):10381-94. doi: 10.3390/s140610381.
In this paper, a novel method for respiratory monitoring is presented. The method is based on Trichel pulses (TPs) using a simple field ionization sensor which consists of a needle electrode and a plate electrode. Experiments have been conducted to demonstrate that different respiratory patterns, including normal, ultra-fast, deep breaths, and apnea could be easily monitored in real time by detecting the changes in the TP frequency. The vital capacity could also be assessed by calculating the variation of TP frequency. It is found that the operation principle of the proposed sensor is based on the effects of breath airflow and the atomized water in exhaled air on the TP frequency by changing the ionization process and the dynamics of charged particles in the short gap. The influences of applied voltage and ambient parameters have also been investigated.
本文提出了一种用于呼吸监测的新方法。该方法基于特里切尔脉冲（TPs），使用一种简单的场电离传感器，该传感器由针状电极和平板电极组成。已经进行了实验以证明，通过检测TP频率的变化，可以轻松实时监测不同的呼吸模式，包括正常、超快、深呼吸和呼吸暂停。肺活量也可以通过计算TP频率的变化来评估。研究发现，所提出的传感器的工作原理是基于呼吸气流和呼出空气中的雾化水对TP频率的影响，通过改变短间隙中的电离过程和带电粒子的动力学。还研究了施加电压和环境参数的影响。
