Instrumentacijsko EKG pojačalo s RC filtrom u ulaznom stupnju

undergraduate thesis

• Title (english): ECG instrumentation amplifier with RC filter in input stage
• Author: Petra Kastrapeli
• Mentor: Ratko Magjarević (mentor)
• Committee member: Ratko Magjarević (predsjednik povjerenstva)
• Committee member: Tihomir Marjanović (član povjerenstva)
• Committee member: Luka Celić (član povjerenstva)
• Granter: University of Zagreb; Faculty of Electrical Engineering and Computing; Zagreb
• Defense date and country: 2015-09-09, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Computing
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Electrical Engineering

Abstract

U ovom završnom radu opisan je način rada EKG uređaja te projektiranje i implementacija jednokanalnog EKG uređaja pomoću operacijskog pojačala. Sklop se napaja baterijom nominalnog napona 3.7 V i mjeri diferencijalni signal između elektroda spojenih na lijevu i desnu ruku. Također postoje u sklopu dva načina rada, monitoriranje i dijagnostički način rada. Monitoring se nalazi u frekvencijskom području između 1 Hz i 45 Hz, dok se dijagnostički način rada nalazi između 0.05 Hz i 120 Hz. Ulazni filtar koji propušta istosmjerni signala bez pojačanja i izmjenični uz pojačanje 5.2 ostvaren je serijom otpornika i kondenzatora na stezaljkama pojačanja instrumentacijskog pojačala. Na izlaz instrumentacijskog pojačala spojen je aktivni Besselov niskopropusni filtar koji, uz filtriranje signala, ostvaruje pojačanje 100. Mjerenjima je pokazano da sklop ne daje idealan signal na izlazu, već signal sa smetnjama.

Abstract (english)

This bachelors thesis describes the operation of ECG devices along with designing and implementing a single-channel electrocardiogram with instrumentation amplifier. Device will be powered with 3.7 V single supply from battery and measures diferential signal between electrodes attached to left and right hand. Device works in two modes, monitoring with frequencies between 1Hz- 45Hz and diagnostic with frequencies between 0.05Hz-120Hz. Input stage filter passes DC signal without gain and AC signal with gain of 5.2. Highpass is realised with resistor and capacitor on gain pins of insturmentation amplifier. Input of lowpass filter is connected to output of insturmentation amplifier. Lowpass filter is active Bessel filter with gain of 100. Testing output gives not perfect, but signal with manacles

• Keywords: instrumentacijsko pojačalo; EKG; visokopropusni filtar; Besselov niskopropusni filtar
• Keywords (english): ECG; instrumentation amplifier; highpass filter; lowpass Bessel filter
• Language: croatian
• URN:NBN: urn:nbn:hr:168:985295
• 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: 2019-03-19 14:01:06