Louarroudi E, Sanchez B
Optical Metrology, 3D design and Mechanics (Op3Mech) Research Group, Faculty of Applied Engineering, University of Antwerp, 2020 Antwerp, Belgium.
Physiol Meas. 2017 Feb;38(2):N73-N80. doi: 10.1088/1361-6579/aa556d. Epub 2016 Dec 22.
When a linear time-varying (LTV) bioimpedance is measured using stepped-sine excitations, a compromise must be made: the temporal distortions affecting the data depend on the experimental time, which in turn sets the data accuracy and limits the temporal bandwidth of the system that needs to be measured.
Here, the experimental time required to measure linear time-invariant bioimpedance with a specified accuracy is analyzed for different stepped-sine excitation setups.
We provide simple equations that allow the reader to know whether LTV bioimpedance can be measured through repeated time- invariant stepped-sine experiments.
Bioimpedance technology is on the rise thanks to a plethora of healthcare monitoring applications. The results presented can help to avoid distortions in the data while measuring accurately non-stationary physiological phenomena. The impact of the work presented is broad, including the potential of enhancing bioimpedance studies and healthcare devices using bioimpedance technology.
当使用步进正弦激励测量线性时变（LTV）生物阻抗时，必须做出妥协：影响数据的时间失真取决于实验时间，而实验时间又决定了数据准确性，并限制了需要测量的系统的时间带宽。
在此，针对不同的步进正弦激励设置，分析了以指定精度测量线性时不变生物阻抗所需的实验时间。
我们提供了简单的公式，使读者能够了解是否可以通过重复的时不变步进正弦实验来测量LTV生物阻抗。
由于大量的医疗保健监测应用，生物阻抗技术正在兴起。所呈现的结果有助于在准确测量非平稳生理现象时避免数据失真。所呈现工作的影响广泛，包括增强生物阻抗研究以及使用生物阻抗技术的医疗保健设备的潜力。
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