Graduate Thesis Or Dissertation

 

Model of Woven Electrode Designed for Long-Term Capture of Electrocardiograph Public Deposited

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https://scholar.colorado.edu/concern/graduate_thesis_or_dissertations/6w924d45q
Abstract
  • There is a growing demand to continuously monitor the ECG over longer periods of time. This demand comes from all areas of life; from tracking sickness for improved treatment and prevention to optimizing performance for athletes and workers in dangerous environments. To meet this demand, wearable devices are designed to monitor health status continuously and autonomously. This is called wellness monitoring, and it has been shown to improve quality of life by reducing reliance on reactive treatments. When wellness monitoring is applied to ECG systems, the existing solutions have a variety of limitations oriented around the limits of traditional electrodes. Conductive textile electrodes offer an alternative to traditional electrodes but they come with their own challenges. One of the key challenges with textile electrodes is that it is not well understood how a given set of manufacturing parameters influence the ECG measurement. The current ways of relating manufacturing parameters to ECG measurements rely on physical trial-and-error methodologies which inhibit design cycle iterations. This research presents a novel model of the ECG system, which ties the electrical behavior of woven textile electrodes to their manufacturing parameters. Specifically, this research investigates how the yarn type, weave pattern, and patch area of a woven electrode are related to the circuit parameters in the skin-electrode interface model. A parameterized model of the ECG system was constructed which depends on the circuit parameter of the skin-electrode interface as well as the circuit parameters of the associated circuitry. Through this relationship, the circuit parameters corresponding to woven electrodes were fit using an optimizer that minimizes the differences between a simulated and measured waveform. This equivalent model demonstrated for the first time the relationship between woven electrode manufacturing parameters and their electrical circuit parameters. By using this model, woven electrodes can be better designed for optimal ECG capture capability. Furthermore, ECG circuitry can be customized to accommodate the variation between different types of electrodes. This work builds from previous work on textile sensor development and enables future work to target even better textile sensor design.

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  • 2022-08-01
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  • 2022-09-14
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