Refined acoustic sensor for fetal heartbeat rate monitoring

This dissertation presents an innovative acoustic detection scheme for a fetal heartbeat, the “Refined Acoustic Sensor for Fetal Heartbeat Rate Monitoring.” The system uses acoustic sensors with acoustic impedance matching diaphragms, processed by signal acquisition circuits. It calculates the heart...

Full description

Saved in:
Bibliographic Details
Main Author: Liu, Wenpeng
Other Authors: Poenar Daniel Puiu
Format: Thesis-Master by Coursework
Language:English
Published: Nanyang Technological University 2024
Subjects:
Online Access:https://hdl.handle.net/10356/181456
Tags: Add Tag
No Tags, Be the first to tag this record!
Institution: Nanyang Technological University
Language: English
id sg-ntu-dr.10356-181456
record_format dspace
spelling sg-ntu-dr.10356-1814562024-12-06T15:49:28Z Refined acoustic sensor for fetal heartbeat rate monitoring Liu, Wenpeng Poenar Daniel Puiu School of Electrical and Electronic Engineering EPDPuiu@ntu.edu.sg Engineering Wearable sensors Fetal heart rate Acoustic sensors Acoustic impedance matching Acoustic signal processing This dissertation presents an innovative acoustic detection scheme for a fetal heartbeat, the “Refined Acoustic Sensor for Fetal Heartbeat Rate Monitoring.” The system uses acoustic sensors with acoustic impedance matching diaphragms, processed by signal acquisition circuits. It calculates the heartbeat through an innovative calculation algorithm, which enables the acquisition and processing of tiny signals to achieve monitoring of fetal health parameters. This research has been validated in multiple stages, from theoretical modeling to lab-stage experiments, sparing no effort to improve the accuracy, reliability, and user-friendliness of fetal heartbeat monitoring. The project is solving three major difficulties: acquisition of weak signals, amplification of weak signals, and processing of acoustic signals. For weak signals, a composite diaphragm structure with a softer "propagation layer" is used to match acoustic impedance with the skin, reducing reflection and improving comfort while minimizing airborne noise. A special acoustic amplifier chip and filter circuit amplifies weak signals while reducing noise. Innovative algorithms process acoustic signals by utilizing both upper/lower half-waves and S1S2 phases to increase accuracy, with adaptive distances and windows enhancing computational efficiency. In addition, considering privacy and info-security issues, certain data are obtained through simulation methods, and future collaboration with medical institutions is planned to ensure the data's authenticity and the system's clinical applicability. Master's degree 2024-12-03T02:06:52Z 2024-12-03T02:06:52Z 2024 Thesis-Master by Coursework Liu, W. (2024). Refined acoustic sensor for fetal heartbeat rate monitoring. Master's thesis, Nanyang Technological University, Singapore. https://hdl.handle.net/10356/181456 https://hdl.handle.net/10356/181456 en ISM-DISS-03756 application/pdf Nanyang Technological University
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic Engineering
Wearable sensors
Fetal heart rate
Acoustic sensors
Acoustic impedance matching
Acoustic signal processing
spellingShingle Engineering
Wearable sensors
Fetal heart rate
Acoustic sensors
Acoustic impedance matching
Acoustic signal processing
Liu, Wenpeng
Refined acoustic sensor for fetal heartbeat rate monitoring
description This dissertation presents an innovative acoustic detection scheme for a fetal heartbeat, the “Refined Acoustic Sensor for Fetal Heartbeat Rate Monitoring.” The system uses acoustic sensors with acoustic impedance matching diaphragms, processed by signal acquisition circuits. It calculates the heartbeat through an innovative calculation algorithm, which enables the acquisition and processing of tiny signals to achieve monitoring of fetal health parameters. This research has been validated in multiple stages, from theoretical modeling to lab-stage experiments, sparing no effort to improve the accuracy, reliability, and user-friendliness of fetal heartbeat monitoring. The project is solving three major difficulties: acquisition of weak signals, amplification of weak signals, and processing of acoustic signals. For weak signals, a composite diaphragm structure with a softer "propagation layer" is used to match acoustic impedance with the skin, reducing reflection and improving comfort while minimizing airborne noise. A special acoustic amplifier chip and filter circuit amplifies weak signals while reducing noise. Innovative algorithms process acoustic signals by utilizing both upper/lower half-waves and S1S2 phases to increase accuracy, with adaptive distances and windows enhancing computational efficiency. In addition, considering privacy and info-security issues, certain data are obtained through simulation methods, and future collaboration with medical institutions is planned to ensure the data's authenticity and the system's clinical applicability.
author2 Poenar Daniel Puiu
author_facet Poenar Daniel Puiu
Liu, Wenpeng
format Thesis-Master by Coursework
author Liu, Wenpeng
author_sort Liu, Wenpeng
title Refined acoustic sensor for fetal heartbeat rate monitoring
title_short Refined acoustic sensor for fetal heartbeat rate monitoring
title_full Refined acoustic sensor for fetal heartbeat rate monitoring
title_fullStr Refined acoustic sensor for fetal heartbeat rate monitoring
title_full_unstemmed Refined acoustic sensor for fetal heartbeat rate monitoring
title_sort refined acoustic sensor for fetal heartbeat rate monitoring
publisher Nanyang Technological University
publishDate 2024
url https://hdl.handle.net/10356/181456
_version_ 1819112940509331456