V računalniško miško vgrajen merilnik prevodnosti kože

magistrsko delo

Tine Šivec (Author), Gregor Geršak (Mentor)

Abstract

V magistrskem delu je predstavljena izdelava in testiranje merilnega sistema za merjenje prevodnosti kože v obliki računalniške miške. Cilj naloge je bil izdelati enostaven in kakovosten merilni sistem, ki omogoča neopazno meritev (skrite elektrode). Neopazno merjenje je zaželeno, saj zmanjšuje vpliv merilne anksioznosti, to je stanje psihične napetosti merjene osebe zaradi sodelovanja v merilnem procesu. Prav ta namreč dviguje krvni tlak in srčni utrip ter povečuje potenje, kar vpliva na prevodnost kože. Cilj je bil izdelati tudi programsko opremo, ki omogoča vpogled v trenutne vrednosti prevodnosti med samo meritvijo, in grafičen prikaz, kar izvajalcu eksperimenta omogoča, da se lahko (odvisno od zastavljenega eksperimenta) odloča o nadaljnjem poteku eksperimenta glede na trenutne vrednosti; na primer povzroči večji stres v primeru majhnega odziva merjenca oziroma tega zmanjša v primeru prevelikega odziva. Že v primeru preprostega eksperimenta, kjer posredovanje izvajalca v potek eksperimenta ni potrebno, pa lahko trenutne vrednosti služijo kot pokazatelj, ali je z meritvijo vse v redu (na primer merjenec ne drži miške za merilne elektrode, meritev se ne izvaja in podobno). V praktičnem delu naloge so predstavljene nekatere merilne metode za merjenje prevodnosti kože in primerjava med njimi, nato pa je opisano merjenje temperature kože. Sledi konstrukcija merilnega sistema, od izbire miške do postavitve elektrod, izbire in opisa komponent merilnega vezja in izdelavi tiskanega vezja ter programiranja mikrokrmilnika. V naslednjem podpoglavju je opisano še delovanje namenskega programskega vmesnika za zajem merilnih signalov. Narejena je tudi statična in dinamična kalibracija in ob koncu še eksperiment, ki pokaže delovanje merilnega sistema v praksi.

Keywords

EDA;prevodnost kože;GSR;merilnik prevodnosti kože;miška;čustveni odziv;inercialna merilna enota;magisteriji;

Data

Language:	Slovenian
Year of publishing:	2022
Typology:	2.09 - Master's Thesis
Organization:	UL FE - Faculty of Electrical Engineering
Publisher:	[T. Šivec]
UDC:	621.317(043.3)
COBISS:	94467331
Views:	178
Downloads:	40
Average score:	0 (0 votes)
Metadata:

Other data

Secondary language:	English
Secondary title:	Embedded electrodermal activity monitor
Secondary abstract:	The master's thesis presents the manufacture and testing of a measuring system for measuring the conductivity of the skin in the form of a computer mouse. The task aimed to create a simple and high-quality measuring system that allows unobtrusive measurement (hidden electrodes). Unobtrusive measurement is desirable because it reduces the impact of measurement anxiety. This is the state of mental tension of the measured person due to participation in the measurement process. Namely, it raises blood pressure and heart rate and increases sweating, which affects the conductivity of the skin. The aim was also to create software that allows insight into the current values of conductivity during the measurement and graphical representation, which allows the experimenter to decide on the further course of the experiment according to current values, for example, to cause more stress in the case of a small response or to reduce it in the case of an excessive response. Even in the case of a simple experiment, where the intervention of the performer in the course of the experiment is not necessary, the current values can serve as an indicator of whether the measurement is OK or not. In the practical part of the thesis, some measurement methods for measuring conductivity of the skin and comparison between them are presented, and then skin temperature measurement is described. This is followed by the construction of the measuring system, from the selection of the mouse to the placement of the electrodes, the selection and description of the components of the measuring circuit, and the production of the printed circuit and programming of the microcontroller. The next subsection describes the operation of a dedicated software interface for capturing measurement signals. Finally, a static and dynamic calibration is performed, and in the end, an experiment that shows the operation of the measuring system in practice.
Secondary keywords:	EDA;skin conductance;GSR;skin conductance measurement device;computer mouse;emotional response;
Type (COBISS):	Master's thesis/paper
Study programme:	1000316
Embargo end date (OpenAIRE):	1970-01-01
Thesis comment:	Univ. v Ljubljani, Fak. za elektrotehniko
Pages:	107 str.
ID:	14271475