Bioimpedance Analysis Using Fractional-Order Equivalent Electrical Circuits

Freeborn, Todd J.

doi:10.1016/b978-0-12-816152-4.00007-8

Cited by 4 publications

(2 citation statements)

References 71 publications

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“…The fractional-order model is the implementation of fractional calculus that is applied to the circuit theory of the supercapacitor [45]. A fractional-order model is used to estimate the parameters of supercapacitors using data obtained from experiment and operating conditions [46].…”

Section: Fractional Order Modelmentioning

confidence: 99%

The different approach for supercapacitor modelling in the perspective of self-discharge study

Bakar

Romli

Yaakob

et al. 2022

IJEECS

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Supercapacitor is a relatively new type of electric component used to store energy compared to a battery. Supercapacitor charge and discharge cycle are faster compared to the battery along with higher power density which increase its application in recent years. However, supercapacitors have quite high self-discharge compared to batteries. This makes energy stored in supercapacitor decrease faster over time when not in use. Various study has been done towards the self-discharge behavior of SC which is both experimentally and in simulation. The simulation is done by various methods and models which have been proposed by previous researchers. Most of the methods that have been used were based on the Equivalent Circuit Model as it is the easiest method available. However, there is still another method proposed such as the Fractional-order model. This paper will review some of the methods and models used to study self-discharge behavior.

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Section: Fractional Order Modelmentioning

confidence: 99%

The different approach for supercapacitor modelling in the perspective of self-discharge study

Bakar

Romli

Yaakob

et al. 2022

IJEECS

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“…In biological applications, where the goal is the investigation of biological structures, the name of the measurement method is changed to bio-impedance spectrum (BIS) measurement. It has been proven that BIS is an effective technique for non-invasive analyses in several healthy subjects [ 1 , 2 ] and in pathological [ 3 , 4 , 5 , 6 ] applications. Furthermore, BIS appears to be an appropriate method for material analysis, not only for human and animal tissue characterisation but also for bacteria ([ 7 , 8 , 9 ]) and viruses [ 10 , 11 ].…”

Section: Introductionmentioning

confidence: 99%

Physical Validation of a Residual Impedance Rejection Method during Ultra-Low Frequency Bio-Impedance Spectral Measurements

Vizvári

Gyorfi

Odry

et al. 2020

Sensors

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Accurate and reliable measurement of the electrical impedance spectrum is an essential requirement in order to draw relevant conclusions in many fields and a variety of applications; in particular, for biological processes. Even in the state-of-the-art methods developed for this purpose, the accuracy and efficacy of impedance measurements are reduced in biological systems, due to the regular occurrence of parameters causing measurement errors such as residual impedance, parasitic capacitance, generator anomalies, and so on. Recent observations have reported the necessity of decreasing such inaccuracies whenever measurements are performed in the ultra-low frequency range, as the above-mentioned errors are almost entirely absent in such cases. The current research work proposes a method which can reject the anomalies listed above when measuring in the ultra-low frequency range, facilitating data collection at the same time. To demonstrate our hypothesis, originating from the consideration of the determinant role of the measuring frequency, a physical model is proposed to examine the effectiveness of our method by measuring across the commonly used vs. ultra-low frequency ranges. Validation measurements reflect that the range of frequencies and the accuracy is much greater than in state-of-the-art methods. Using the proposed new impedance examination technique, biological system characterization can be carried out more accurately.

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