Akuisisi Data dan Pengolahan Isyarat Elektrokardiograf Menggunakan Modul USB Dataq DI-148U

Henry Sulistyo, Thomas Sri Widodo, Maesadji Tjokronagoro, Indah Soesanti

Abstract


Abstract—Heart signal data acquisition for the purpose of research is still an obstacle when using the standard ECG equipment from the manufacturer. The problem is the expensive equipment and the conversion of images into digital data. By using instrumentation amplifiers and electronic components in the market can be realized a simple ECG prototype by using interface Dataq DI-148U USB module for cardiac signals data acquisition.
In this study, single channel ECG prototype realized with twelve leads by manually selected. Tests using five subjects that compared the results with standard hospital ECG equipment.
From ECG prototype tests each sub section, the results are in accordance with the planning. The use of adhesive floating electrode type showed a smaller noise. IIR digital filter effectively reduces noise with SNR above of 20 dB and baseline wander at frequency cutoff 0.95 Hz. The threshold method is capable of detecting the peak R-R interval well to calculate the heart rate.

Intisari— Akuisisi data isyarat jantung untuk tujuan penelitian masih menjadi kendala apabila menggunakan peralatan EKG standar dari pabrikan. Faktor kendalanya adalah mahalnya peralatan dan proses konversi dari citra menjadi data digital. Dengan menggunakan penguat instrumentasi dan komponen elektronik yang ada dipasaran dapat direalisasikan prototipe EKG sederhana dengan menggunakan antarmuka modul usb Dataq DI-148U untuk akuisisi data isyarat jantung.
Pada penelitian ini, direalisasikan prototipe EKG kanal tunggal dengan duabelas sandapan yang dipilih secara manual. Pengujian menggunakan lima subjek yang dibandingkan hasilnya dengan peralatan EKG standar rumah sakit.
Dari pengujian prototipe EKG per sub bagian hasilnya
telah sesuai dengan perencanaan. Penggunaan elektroda jenis adhesive floating menunjukkan derau yang lebih kecil. Tapis digital IIR efektif menekan derau dengan SNR rata-rata diatas 20 dB dan derau baseline wander pada frekuensi putus 0,95 Hz. Metode threshold mampu mendeteksi puncak interval R-R dengan baik untuk menghitung detak jantung.

Kata kunci— EKG, Akuisisi Data, Pengolahan Isyarat, Detak Jantung


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References


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DOI: http://dx.doi.org/10.22146/jnteti.v2i1.30

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