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Simulator prevodnosti kože
KENK, MIHA (Author), Geršak, Gregor (Mentor) More about this mentor... This link opens in a new window

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Abstract
Merilniki prevodnosti človeške kože so dandanes v uporabi na najrazličnejših področjih – od znanosti, zdravstva do zabavne industrije. Kljub njihovi vsestranski uporabi, pa se njihova merilna točnost le redko preverja. Na trgu ni prisotne naprave, ki bi omogočala testiranje merilnih naprav za merjenje prevodnosti kože s pomočjo generiranja SC signalov. Diplomsko delo obsega načrtovanje, izdelavo in testiranje prototipa takega simulatorja. V splošnem je simulator naprava, ki je namenjena posnemanju fizikalnih procesov; uporaben je predvsem za preizkušanje pravilnega in natančnega delovanja merilnih naprav. Simulator, zasnovan in izdelan v okviru diplomskega dela, simulira spreminjanje prevodnosti kože in posledično omogoča statično in dinamično vrednotenje merilnih naprav za merjenje prevodnosti kože, s katerima lahko nato določimo pogrešek teh merilnikov. V diplomskem delu je naprej predstavljena zgradba kože in njene naloge, osnove merjenja njene elektrodermalne aktivnosti in osnovni princip merilnikov prevodnosti kože. Sledi določitev nabora potrebnih funkcij, ki jih mora vsebovati naprava za testiranje naprav za merjenje prevodnosti kože. Potrebno je bilo izbrati ustrezen element, s katerim se je omogočila realizacija spreminjanja upornosti v želenem uporovnem območju. Preizkusilo se je več možnosti izvedb, kako realizirati spremenljiv upor, in izbrati najustreznejšo rešitev, za katero se je na koncu izkazal optosklopnik. Za lažjo izvedbo generiranja SC signalov, ki predstavljajo spreminjanje prevodnosti kože, je bila uporabljena razvojna ploščica Arduino Due. Sledila je zasnova zgradbe, preučitev načina izvedbe ter izdelava prototipa simulatorja. Delovanje le-tega je bilo potrebno preizkusiti s komercialnim merilnikom za merjenje prevodnosti kože in preveriti točnost delovanja naprave. V zaključnem delu so podani rezultati testiranja, predlogi za izboljšavo simulatorja, na kratko pa je povzeta tudi celotna vsebina diplomskega dela.

Language:Slovenian
Keywords:Prevodnost kože, koža, merilnik prevodnosti kože, simulator prevodnosti kože, Arduino, mikrokrmilnik, programiranje, optosklopnik, Biopac
Work type:Undergraduate thesis (m5)
Organization:FE - Faculty of Electrical Engineering
Year:2016
Views:629
Downloads:728
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Secondary language

Language:English
Title:Skin conductance simulator
Abstract:
Devices to measure human skin conductance are used in higly versatile fields nowadays – from science and health care to entertainment industry. Despite their universal use their measurement accuracy is controlled very seldom. Nowadays there is no device on the market that enables the testing of skin conductance measuring devices using generated SC signals. The thesis comprises the planning, the making and the testing of a prototype of such a simulator. In general a simulator is a device meant for imitating the physical processes. It is mostly useful for testing the correct and accurate functioning of the measuring device. The simulator constructed and produced within this thesis, simulates the changing of skin conductance and consequently enables the static and the dynamic evaluation of the skin conductance measuring device, which then allow setting the errors within the measuring device. The thesis first focuses on the skin structure, its functions, the basics of measuring its electro-dermal activity and the basic principles of skin conductance measures. Then the necessary functions needed in the appliance for testing the skin conductance measuring device are defined. The suitable element had to be chosen to enable the changing of resistance in the desired resistance scale. Several possibilities were tested to see how to provide a variable resistance and select the most appropriate solution. The optocoupler turned out to be the best option. To provide the generating of SC signals, which present the changing of the skin conductance, more easily, the Arduino Due microcontroller board was used. It was followed by designing the structure, studying how to carry it out and making the simulator prototype. Its functioning had to be tested using a commercial skin conductance measuring device and checking its accuracy. The last part of the thesis provides the results of the testing, suggestions for the improvements on the simulator and a short summary of the entire thesis.

Keywords:Skin conductance, skin, measurement system for measuring skin conductance, skin conductance simulator, Arduino, microcontroller, programming, optocoupler, Biopac

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