Ročaj z merilnikom sile prijema in senzorji fizioloških odzivov

LAPAJNE, MATEVŽ (author), Mihelj, Matjaž (mentor), Geršak, Gregor (co-mentor)

Diplomsko delo obsega načrtovanje in izdelavo merilnega sistema za merjenje temperature, srčnega utripa, prevodnosti kože in sile stiska roke ter izdelavo ročaja, v katerega so vgrajeni senzorji za merjenje zgoraj naštetih parametrov. Poleg izdelave merilnega sistema in ročaja diplomsko delo pojasnjuje tudi zgradbo in princip delovanja senzorjev ter zajem in prikaz dobljenih podatkov preko programske kode. Najprej se seznanimo z nalogo in zmožnostjo Raspberry Pi, prilagoditvenega vezja med Raspberry Pi in Arduinom ter e-Health platformo, ki so ključni pri zajemu in prikazu podatkov. Najbolj natančno je opisan Raspberry Pi, saj služi kot običajni računalnik, vendar je za razliko od le-tega fizično majhen, ima nizko porabo energije, hkrati pa je dovolj zmogljiv za zajem, prikaz podatkov in urejanje programske kode. Nato izvemo, kako lahko povežemo Raspberry Pi z osebnim računalnikom in preko osebnega računalnika manipuliramo z Raspberry Pi. Izvemo tudi, kako avtomatsko zaganjamo programe. Sledi poglavje, ki opisuje senzoriko merilnega sistema. Pri senzorju za prevodnost kože najprej spoznamo zgradbo, nalogo in lastnosti kože, kako se čustva odražajo na koži, nato pa predstavimo, kako deluje senzor za prevodnost kože. Sledi senzor za srčni utrip: najprej izvemo, kako lahko merimo srčni utrip in kaj nam pove. Uporabljena metoda fotopletizmografija pa je bolj natančno predstavljena. Nato sledi predstavitev uporabljenega senzorja Pulse sensor, njegovega delovanja in sestava ter razlaga programske kode senzorja. Podpoglavje merjenje temperature opiše metode merjenja temperature, podrobno delovanje in zgradbo senzorja, prav tako pa opisuje tudi programsko kodo, ki vrača vrednost temperature. Pri podpoglavju o merjenju sile izvemo način merjenja sile stiska ter podrobno delovanje senzorja. Celoten merilni sistem je vgrajen v 3-D natisnjen ročaj iz dveh delov valjaste oblike. Na koncu sledi še poglavje o izdelavi ročaja ter zaključek, ki vsebuje preizkušanje sistema ter njegove možne nadgradnje.

• Language: Slovenian
• Keywords: Raspberry Pi, prevodnost kože, srčni utrip, merjenje sile, merjenje temperature, merilni sistem v ročaju
• Work type: Undergraduate thesis
• Organization: FE - Faculty of Electrical Engineering
• Year: 2015
• PID: 20.500.12556/RUL-30503
• Publication date in RUL: 13.01.2015

Secondary language

• Language: English
• Title: Handle for measuring grasping force and physiological responses

Abstract

This diploma thesis illustrates the design and production of a measurement system which measures temperature, heart rate, skin conductivity, hand squeeze force, and the production of the handle with integrated sensors that measure these parameters. Furthermore, this diploma thesis presents also the structure of sensors and principles of sensor operation as well as data capturing and display of acquired data through program code. At the beginning, we presented the task and capability of the Raspberry Pi, Raspberry Pi to Arduino shield connection bridge and e-Health Platform that play a key role in data capturing and data display. Raspberry Pi is described in most detail because it acts as an ordinary computer but is small in size, consumes little energy and at the same time it can capture and display data and manage program code. Then it is described how one can connect Raspberry Pi with a personal computer which enables manipulation of the Raspberry Pi by means of a personal computer. One learns also how programs can be started automatically. What follows is a description of measurement system sensor technology. First, we described the construction and function of the skin conductivity sensor, skin characteristics and facts how emotions reflect on the skin. Then the operation of the skin conductivity sensor is described. As regards the heart rate sensor, one learns here how heart rate can be measured and what the measurement tells us. The used photoplethysmography method is presented in more detail. This presentation is followed by the presentation of the sensor used – Pulse sensor, its function and structure, and explanation of sensor’s program code. The subsection on temperature measurement contains description of the methods of temperature measurement, detailed functions and structure of the sensor as well as description of the program code that returns temperature value. The subsection on force measurement presents the method of hand squeeze force measurement and a detailed function of the sensor. The whole measurement system is integrated into a 3D printed handle that consists of two cylinder-shaped parts. In the end there’s a section on handle production which is followed by the conclusion describing system testing and its possible upgrades.

• Keywords: Raspberry Pi, skin conductance, heart rate, force measurement, temperature measurement, measuring system in handle