Usporedba rezultata simulacije kapacitivnih beskontaktnih elektroda s rezultatima sklopovske izvedbe

master's thesis

• Title (english): Comparison of Simulated and Measured Results of Non-contact Capacitive Electrodes
• Author: Luka Klaić
• Mentor: Mario Cifrek (mentor)
• Committee member: Mario Cifrek (predsjednik povjerenstva)
• Committee member: Tomislav Pribanić (član povjerenstva)
• Committee member: Hrvoje Džapo (član povjerenstva)
• Granter: University of Zagreb; Faculty of Electrical Engineering and Computing; Zagreb
• Defense date and country: 2022-06-28, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Computing
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Electrical Engineering

Abstract

U ovom je radu u CST Studio Suite okruženju razvijen elektromagnetski kosimulacijski model beskontaktne kapacitivne elektrode, primijenjene u mjerenju mioelektričkog signala s površine kože prekrivene tkaninom. Mišić je oblikovan kao višeslojni volumni vodič s linijskim izvorom akcijskog potencijala. Četveroslojne su elektrode realizirane i sklopovski, nakon čega je provedena usporedba rezultata mjerenja i simulacije. Uslijed utjecaja smetnji i artefakata proizašlih iz pomaka, umjesto mioelektričkih signala primarno su izvršena mjerenja elektrokardiografskog signala uz pomoć dva različita akvizicijska sustava. Uz dodatak referentne elektrode rezultati mjerenja su dokazali značaj simulacije kao metode dizajniranja prototipa pogodne u svrhu ubrzavanja razvoja te uštede vremena i resursa. Tanji sloj tkanine veće relativne dielektrične permitivnosti, veća blizina elektrode i tkanine te radijus detekcijske plohe u vrijednostima oko polovine ukupnog radijusa zaštitnog prstena pojačavaju pozitivnu kapacitivnu spregu između izvora biomedicinskog signala i elektrode.

Abstract (english)

In this work, an electromagnetic co-simulation model of non-contact capacitive electrodes is developed to measure myoelectric signals on the fabric-covered skin surface. The muscle is modelled as a cylindrical volume conductor with a line action potential source. In addition, the four-layer electrodes are physically implemented. Then, the comparison between the measurements and the simulation is considered. Due to the influence of noise and motion artifacts, the electrical signals of the heart are measured using two acquisition systems instead of the myoelectric signals. With the addition of a third body bias electrode, the results have demonstrated the importance of simulation as a method for prototype design, useful for accelerating development and saving time and resources. A thinner fabric layer with a greater dielectric permittivity, a smaller distance between the electrode and the fabric, and a radius of detection disc that is half the total radius of the guard ring result in stronger capacitive coupling between the biomedical signal source and the electrode.

• Keywords: površinska elektromiografija; EMG; kapacitivne elektrode; metoda konačnih elemenata; CST Studio Suite; kosimulacijska analiza
• Keywords (english): Surface Electromyography; EMG; Capacitive Electrode; Finite Element Method; CST Studio Suite; Electromagnetic/Circuit Co-Simulation
• Language: croatian
• URN:NBN: urn:nbn:hr:168:544141
• Study programme: Title: Electrical Engineering and Information Technology; Study programme type: university; Study level: graduate; Academic / professional title: magistar/magistra inženjer/inženjerka elektrotehnike i informacijske tehnologije (magistar/magistra inženjer/inženjerka elektrotehnike i informacijske tehnologije)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Closed access
• Created on: 2023-01-13 15:17:31