基于CPLD高精度恒流源技术的呼吸体积描记系统的设计

发布时间：2018-02-13 06:07

本文关键词： 呼吸感应体积描记呼吸参数高精度恒流源肺功能仪锁相放大电路自动增益放大电路　出处：《计算机测量与控制》2014年10期 　论文类型：期刊论文

【摘要】：利用呼吸感应体积描记(RIP)技术测量呼吸参数已得到了越来越广泛的认可,针对人体呼吸运动引起传感线圈的电感量变化非常小(小于几百nH),一般系统难以保证精确性和适用性问题;硬件设计采用了高精度恒流源,锁相放大和自动增益控制放大电路,并详细分析了各部分电路的特性,包括在平静呼吸和用力呼吸模式下分别对14位测试者测量潮气量和呼吸频率,并且与德国耶格公司的肺功能仪所测量的结果对比;实验证明RIP系统在这两种模式下测量潮气量和呼吸频率等呼吸参数与速度描记仪存在显著的正相关关系,说明该系统工作良好、测量精确,操作简单、便于携带和低功耗,未来可以在临床上推广应用于长时间动态的呼吸监测。
[Abstract]:The use of respiratory inductive sketching (RIP) technology to measure respiratory parameters has gained more and more recognition. The inductance of the sensing coil caused by human breathing motion is very small (less than several hundred nHs), so it is difficult to ensure the accuracy and applicability of the general system. The hardware design adopts high precision constant current source, phase-locked amplifier and automatic gain control amplifier circuit. The characteristics of each part of the circuit are analyzed in detail, including the measurement of tidal volume and breathing frequency of 14 testers in calm breathing mode and forced breathing mode respectively, and the results are compared with those measured by the German Yegger Pulmonary function Meter. The experimental results show that the RIP system has a significant positive correlation with the velocimeter in measuring tidal volume and breathing frequency in these two modes, which indicates that the system works well, is accurate, easy to operate, easy to carry and low power consumption. In the future, it can be popularized in clinical application for long-term dynamic respiratory monitoring.
【作者单位】：解放军第305医院医学工程科;解放军第305医院呼吸内科;南方医科大学生物医学工程学院;
【基金】：首都医学发展基金资助项目(2007-3038)
【分类号】：R197.39

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