Design & Implementation of a Portable Fetal Heart Monitoring System
Abstract：A novel, fully-digital and portable FHR measuring system that could be applied for FHR detection was designed.Digital multiplication methods and windowed ultrasonic echo were adopted to obtain the doppler frequency shift signal that could be detected at specific depths of tissue.This proposed system included three portions, namely: (1) CPLD ultrasonic excitation and acquisition circuit, (2) MCU and peripheral circuit, and (3) the system software.And the experimental results prove that the proposed system can be a stable and reliable alternative for the measurement of FHR, in comparison with two commercial fetal heart measuring instruments.
Keywords：Fetal heart monitoringNoise removalDoppler shiftWeak signal detectionHigh-sensitivity
Publication Date：2017-04-02
Online Publishing Date：2026-09-11(First online date of this platform, not the publication date of the document)
Pages：6( 137-142 )