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一种使用3L注射器对呼吸流速仪进行快速校准的方法。

A Fast Calibration Method for Pneumotachograph with a 3L Syringe.

作者信息

Li Yueqi, Qiu Xin, Zhang Hao, Xu Lirui, Lu Saihu, Du Lidong, Chen Xianxiang, Fang Zhen

机构信息

Institute of Microelectronic, Chinese Academy of Sciences (IMECAS), Beijing 100029, China.

Aerospace Information Research Institute, Chinese Academy of Sciences (AIRCAS), Beijing 100190, China.

出版信息

Bioengineering (Basel). 2023 Sep 7;10(9):1053. doi: 10.3390/bioengineering10091053.

DOI:10.3390/bioengineering10091053
PMID:37760155
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC10525123/
Abstract

The pneumotachograph (PNT), a commonly used flowmeter in pulmonary function diagnostic equipment, is the required frequency calibration to maintain high accuracy. Aiming to simplify calibration steps, we developed a fast calibration system with a commercially available 3L syringe to provide a real output flow waveform. The acquisition of the real output flow waveform is based on the reliable measurement of in-cylinder pressure and the real-time detection of plunger speed. To improve the calibration accuracy, the tapping position for measuring in-cylinder pressure was optimized by CFD dynamic-mesh updating technique. The plunger speed was obtained by tracking the handle of the plunger with a smart terminal. Then, the real output flow was corrected using a compensation model equation. The calibration system was verified by the pulmonary waveform generator that the accuracy satisfied the requirements for respiratory flow measurement according to ATS standardization. The experimental results suggest that the developed method promises the fast calibration of PNT.

摘要

呼吸流速仪（PNT）是肺功能诊断设备中常用的流量计，需要进行频率校准以保持高精度。为了简化校准步骤，我们开发了一种使用市售3L注射器的快速校准系统，以提供实际输出流量波形。实际输出流量波形的获取基于气缸内压力的可靠测量和柱塞速度的实时检测。为了提高校准精度，采用计算流体动力学（CFD）动态网格更新技术优化了测量气缸内压力的敲击位置。通过智能终端跟踪柱塞手柄获得柱塞速度。然后，使用补偿模型方程对实际输出流量进行校正。通过肺波形发生器验证校准系统，其精度符合美国胸科学会（ATS）标准化对呼吸流量测量的要求。实验结果表明，所开发的方法有望实现呼吸流速仪的快速校准。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f3eb/10525123/4aadcdd1698b/bioengineering-10-01053-g012.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f3eb/10525123/4aadcdd1698b/bioengineering-10-01053-g012.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f3eb/10525123/6f7f99c0a7a1/bioengineering-10-01053-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f3eb/10525123/63a16657b030/bioengineering-10-01053-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f3eb/10525123/a8d0eb3ec491/bioengineering-10-01053-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f3eb/10525123/9963ec59a670/bioengineering-10-01053-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f3eb/10525123/adf5a4e37f84/bioengineering-10-01053-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f3eb/10525123/bf6a24431cd0/bioengineering-10-01053-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f3eb/10525123/25ecbbdafaa6/bioengineering-10-01053-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f3eb/10525123/f8768bcef57a/bioengineering-10-01053-g010.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f3eb/10525123/4aadcdd1698b/bioengineering-10-01053-g012.jpg

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