The process of life is often complicated and full of conditions. Although the care and care of the mother can be strengthened to ensure the health and safety of the fetus to a certain extent, there are still some omissions. To this end, it is usually necessary to use external instruments to detect fetal development. The fetal heart is the earliest functional organ that can transmit important information related to the health of the fetus. Ultrasound Doppler fetal monitors with digital display function are often inaccurate when using traditional stethoscopes for artificial fetal heart rate detection. It is expensive only for hospital use and difficult to meet daily needs.
With the application and development of sensor technology, a non-invasive fetal heart rate detection method based on MEMS acceleration sensor has been proposed. Based on the accelerating sensor, this is a medical auxiliary instrument for self-inspection of pregnant women between the fetal heart stethoscope and the fetal monitor, which is simple, convenient and intuitive. In this solution, the fetal heart rate is converted into an analog voltage signal by the measurement of the acceleration sensor, and after the series of intermediate signals are processed by circuit amplification, filtering and noise reduction, the analog voltage signal is converted into a digital signal by the A/D converter. And input to the microcontroller for analysis and processing, and finally output the measurement results.
The fetal heart rate tester based on the MEMS accelerometer design can be used to develop a remote fetal heart rate monitoring system. In this system, when the hospital center server completes the signal collection and analysis and gives the results, the doctor diagnoses the result, and if there is a problem, promptly informs the pregnant woman to go to the hospital for review. This technology is convenient for pregnant women to check the condition of the fetus at any time, which is beneficial to the health of the fetus and pregnant women.
The SCA620-EF8H1A is a single-axis accelerometer based on Murata's (formerly Finnish VTI) capacitive 3D-MEMS technology. The measuring axis is the Z-axis with a range of ±1.7g. Designed, manufactured and tested to the highest reliability and stability requirements, the SCA620-EF8H1A offers exceptional reliability, exceptional stability and unprecedented accuracy in all temperature zones. The SCA620-EF8H1A is part of the VTI analog accelerometer product and is fully compatible with the SCA610 and SCA620 series of accelerometers.
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