Design and Simulation of a MEMS-Based FHR Measuring Apparatus

Traditional apparatus for Fetal Heart Rate(FHR)measurement is expensive,and also it's harmful to the fetus.Therefore,a portable FHR apparatus using MEMS accelerometer was designed which has the advantage of high safety.A low pass filter was designed and the simulated result from ORCAD shows that this filter is preferable to gain low-frequent FHR signal.Autocorrelation Function(ACF)and spectral analysis were adopted in the FHR signal processing and simulated in MATLAB.The result demonstrates that it can eliminate the noise effectively.