Ramadhan, Hikmal Fauzan (2025) Pengembangan Sistem Phonocardiography Untuk Pemantauan Detak Jantung Ibu Hamil Menggunakan Fiber Optic SMS Dengan Enklosur Karet Silikon. Other thesis, Institut Teknologi Sepuluh Nopember.
![[thumbnail of 5009211061-Undergraduate_Thesis.pdf]](http://repository.its.ac.id/style/images/fileicons/text.png) |
Text
5009211061-Undergraduate_Thesis.pdf - Accepted Version Restricted to Repository staff only Download (5MB) | Request a copy |
Abstract
Penelitian ini membahas pengembangan sistem phonocardiography berbasis serat optik Singlemode-Multimode-Singlemode dengan enklosur karet silikon untuk pemantauan detak jantung ibu hamil. Sistem ini memanfaatkan fenomena multimode interference (MMI) pada serat multimode (MMF) yang sensitif terhadap getaran akustik akibat aktivitas mekanis jantung. Untuk pendekatan simulasi aktivitas jantung manusia, digunakan speaker subwoofer yang menghasilkan getaran sesuai frekuensi detak jantung.. Uji performansi dilakukan pada variasi panjang MMF (2–8 cm) dengan tiga jenis MMF: graded-index, coreless, dan step-index. Panjang optimal MMF ditemukan pada 4 cm. Kalibrasi sistem juga dilakukan pada audio generator, osiloskop, dan speaker dengan error rata-rata di bawah 2%. Pemrosesan sinyal menggunakan filter bandpass (20–120 Hz), moving average filter, dan segmentasi berhasil mengekstraksi komponen utama PCG seperti bunyi S1, S2, serta Interval Waktu sistol dan diastol. Validasi hasil pengukuran dibandingkan dengan database suara jantung yang menunjukkan error rata-rata detak jantung terkecil ialah MMF step-index yang memiliki error dibawah 3% untuk pengukuran BPM.
=====================================================================================================================================
This research presents the development of a non-invasive phonocardiography (PCG) system using Singlemode-Multimode-Singlemode (SMS) optical fiber with a silicone rubber enclosure for maternal heart rate monitoring. The system leverages the multimode interference (MMI) phenomenon within the multimode fiber (MMF), which is highly responsive to acoustic vibrations generated by cardiac mechanical activity. A subwoofer speaker was utilized to simulate human heart vibrations across typical frequency ranges. Performance evaluation was conducted on MMF lengths between 2–8 cm, using three types of MMF: graded-index, coreless, and step-index. The optimal MMF length was identified at 4 cm. System calibration using an audio generator and speaker yielded an average error below 2%. Signal processing incorporated a 20–120 Hz bandpass filter, moving average smoothing, and segmentation, successfully isolating key PCG parameters such as S1 and S2 heart sounds, as well as systolic and diastolic durations. Validation against a heart sound database revealed that the step-index MMF achieved the highest accuracy, with a mean BPM error below 3%. These findings demonstrate the potential of SMS fiber-based PCG systems as accurate, low-cost, and radiation-free tools for maternal cardiovascular monitoring.
| Item Type: | Thesis (Other) |
|---|---|
| Uncontrolled Keywords: | Acoustics, Fiber Optics, Heart Rate, Maternal, Phonocardiography, Akustik, Detak Jantung, Maternal, Phonocardiography, Serat Optik |
| Subjects: | Q Science > QC Physics > QC100.5 Measuring instruments (General) Q Science > QC Physics > QC221 Acoustics. Sound Q Science > QC Physics > QC448 Fiber optics. R Medicine > R Medicine (General) > R856.2 Medical instruments and apparatus. |
| Divisions: | Faculty of Industrial Technology and Systems Engineering (INDSYS) > Physics Engineering > 30201-(S1) Undergraduate Thesis |
| Depositing User: | Hikmal Fauzan Ramadhan |
| Date Deposited: | 04 Aug 2025 11:43 |
| Last Modified: | 04 Aug 2025 11:43 |
| URI: | http://repository.its.ac.id/id/eprint/126673 |
Actions (login required)
 |
View Item |