Acquiring method of fetal heart rate and fetus-voice meter

Abstract

The present invention proposes a fetal heart rate acquisition method and a fetal heart rate instrument, which relate to the field of medical devices and include the following steps: acquiring a Doppler ultrasonic signal; converting the Doppler ultrasonic signal into an audio signal; preprocessing the audio signal, Obtain an audio signal with a low sampling rate and low frequency; perform autocorrelation calculation and product term calculation on the preprocessed audio signal; the maximum value obtained in the autocorrelation calculation is the first main peak value, and the second maximum value is the second main peak value; Judging whether the first main peak value and the second main peak value have a multiple relationship; and further obtaining the fetal heart rate according to the judgment result. The present invention eliminates the problem of fetal heart rate calculation delay, can well solve the problem of halving and doubling the fetal heart rate, and can well meet the real-time requirement, which is more conducive to clinical diagnosis.

Description

technical field [0001] The invention relates to the field of medical devices, in particular to a fetal heart rate acquisition method and a fetal heart rate instrument. Background technique [0002] The fetal heart rate instrument plays an important role in clinical diagnosis, especially in perinatal monitoring, which helps to improve the quality of fetal delivery and reduce the rate of fetal malformation and mortality. The index of the fetal heart rate is an extremely important index of the fetus, therefore, the accuracy of obtaining and calculating the fetal heart rate is very important. [0003] At present, the fetal heart rate calculation scheme of the fetal heart rate instrument generally uses hardware zero-crossing detection, outputs pulse waves, calculates the interval between two pulse waves to obtain the first fetal heart rate, and performs autocorrelation processing on the Doppler envelope signal to obtain the second fetal heart rate. The fetal heart rate is then c...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the deficiencies of the prior art and propose a method for obtaining the fetal heart rate. Through this method, there is no problem of fetal heart rate calculation delay, and the problem of halving and doubling the fetal heart rate can be well solved. , and can well meet the real-time requirements, which is more conducive to clinical diagnosis

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