刚刚，来自以色列的研究人员利用Plantarray植物逆境研究系统发表了题为On the Interpretation of Four Point Impedance Spectroscopy of Plant Dehydration Monitoring文章，文章发表于IEEE Journal on Emerging and Selected Topics in Circuits and Systems ( Volume: 11, Issue: 3, Sept. 2021)期刊上。

植物脱水监测的四点阻抗谱解读

摘要

在这篇论文中，我们提出了一项用于植物监测的活体四点阻抗谱（FPIS）的研究。测定了烟草植株在水合/脱水循环下的FPI与时间的关系。为了更好地控制排水，这些植物被安置在重量分析系统中，并在沙子中生长。每隔几分钟以固定的时间间隔收集数据，收集40Hz-2MHz范围内几百个频率的复阻抗值。由于收集的数据量巨大，数据表示和解读成为一个挑战。将通过针对方法检查系统和解释数据的可能方法来对这两个问题讨论。将电气测量和各种分析方法的结果与成熟的农业重量测量结果进行了比较。FPIS结果表明，阻抗取决于植物状态，类似于重力测量系统中表示的值，因此，植物状态可以从电气测量中解释。每种数据解释方法都检查到了变化，可用于进一步开发设备之用。

On the Interpretation of Four Point Impedance Spectroscopy of Plant Dehydration Monitoring

Abstract

In this paper, we present a study of in-vivo four-point impedance spectroscopy (FPIS) for plant monitoring. FPIS was measured vs. time under hydration/dehydration cycles in tobacco plants. The plants were set up in a gravimetric system and grown in sand for better control of water drainage. Data was gathered at fixed time intervals, every few minutes, collecting the complex impedance values at a few hundred frequencies in the 40 Hz to 2MHz range. Due to the large amount of the collected data, the issues of data representation and interpretation became a challenge. These two issues are discussed examining system orientated approaches, along with possible methods representing and interpreting the data. The results of the electrical measurements and the various analysis methods were compared to those of the well-established agriculture gravimetry measurements. The FPIS results show that the impedance depends on the plant status, similar to the value expressed in the gravimetry system, thus the plant status can be interpreted from the electrical measurements. Each of the data interpretation methods examines the change and is suggested for further device development.

Published in:IEEE Journal on Emerging and Selected Topics in Circuits and Systems ( Volume: 11, Issue: 3, Sept. 2021)