Instrumentacijsko pojačalo kao ulazni sklop za mjerilo impedancije HP4284

undergraduate thesis

• Title (english): An Instrumentation Amplifier as a Front-end for HP4284 Impedance Meter
• Author: Mia Tomić
• Mentor: Igor Lacković (mentor)
• Committee member: Igor Lacković (predsjednik povjerenstva)
• Committee member: Sara Žulj (član povjerenstva)
• Committee member: Dominik Džaja (član povjerenstva)
• Granter: University of Zagreb; Faculty of Electrical Engineering and Computing; Zagreb
• Defense date and country: 2019-09-10, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Computing
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Electrical Engineering

Abstract

Završni rad opisuje nekoliko različitih metoda mjerenja impedancije, usredotočeno
na metodu autobalansirajuceg mosta. Uređajem temeljenom na spomenutoj metodi
mjerena je impedancija poznatog iznosa na dva načina: izravno spajanjem na uređaj te
instrumentacijskim pojačalom INA111 kao ulaznim sklopom. Impedancija poznatog
iznosa zapravo predstavlja električni model ljudskog tkiva, stoga su u zadnjem poglavlju dani i rezultati mjerenja stvarnog tkiva podlaktice kao i mjerenje fizološke otopine.
Rad u suštini pokazuje i usporeduje točnost opisanih načina mjerenja na frekvencijskom pojasu od 40Hz do 1MHz.

Abstract (english)

This final paper describes several different measurement methods of electrical impedance, focusing on the method of an autobalancing bridge. The device based on
this method, Hewlett-Packard 4284, measured impedance of the known amount in two
ways: directly by connecting to the device with measuring electrodes and with INA111
instrumentation amplifier as a front-end. Impedance of the known amount is actually
an electrical model of human tissue, therefore, in the last chapter, the results of measurement of real tissue of the lower arm are given. Saline solution impendance was also
measured. The work essentially shows and compares the accuracy of the two described
measurement methods on the frequency band from 40Hz to 1MHz.

• Keywords: Mjerenje impedancije; Pojačalo kao ulazni sklop; Instrumentacijsko pojačalo; Impedancija Kože
• Keywords (english): Impedance measurement; Amplifier as Front-End; Tissue impedance measurement
• Language: croatian
• URN:NBN: urn:nbn:hr:168:598469
• Study programme: Title: Electrical Engineering and Information Technology; Study programme type: university; Study level: undergraduate; Academic / professional title: sveučilišni/a prvostupnik/ prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka elektrotehnike i informacijske tehnologije (sveučilišni/a prvostupnik/ prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka elektrotehnike i informacijske tehnologije)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Closed access
• Created on: 2020-01-07 22:41:53