Passive fetal heart monitoring system based on acoustic sensor

Abstract

The invention discloses a passive fetal heart monitoring system based on an acoustic sensor, and belongs to the fetal heart monitoring technology. The monitoring system comprises an acoustic sensor directly or indirectly switched into a signal conditioning unit, the signal conditioning unit switched into a wireless transmitter, a wireless signal transmitter and intelligent terminal equipment, wherein the acoustic sensor is used for transmitting a collected heart sound signal to the signal conditioning unit; the signal conditioning unit is used for receiving a heart sound signal from the acoustic sensor and transponding the signal to the wireless signal transmitter; the wireless signal transmitter directly sends the heart sound signal to the intelligent terminal equipment; and the intelligent terminal equipment is used for detecting and recording the heart sound signal from the signal conditioning unit through an application program. Through adopting the acoustic sensor, a heart sound signal of a fetus is passively monitored on a belly of a gravida, so that ultrasonic radiation and worse user experience are eliminated; the passive fetal heart monitoring system is suitable for frequentative and repetitive examinations and household use, can also measure body temperature of the gravida at the same time, and is simple in structure, small in power consumption, low in use cost, and suitable for industrialized production, and facilitates popularization.

Description

[0001] technical field [0002] The present invention relates to a fetal heart rate monitoring technology, more specifically, the present invention mainly relates to a passive fetal heart rate monitoring system based on an acoustic sensor. [0003] Background technique [0004] At present, there are a large number of active fetal heart rate monitoring devices on the market, that is, the fetal heart rate is acquired by means of ultrasonic radiation. This method of obtaining fetal heart rate is realized based on the Doppler principle, and in the process of realization, it is necessary to actively transmit ultrasound to the fetus. When the ultrasound encounters an obstacle, that is, the fetal heart, it will be reflected, and finally the analog multiplier will The fetal heart rate signal is demodulated. Although Doppler ultrasound technology is mature, there is a common problem of radiation intensity, which belongs to the category of destructive detection and is not suitab...

AI Technical Summary

Problems solved by technology

[0006] One of the purposes of the present invention is to address the above deficiencies and provide a passive fetal heart rate monitoring system based on an acoustic sensor, in order to solve the problems of ultrasonic radiation in fetal heart rate monitoring in the prior art, which is not suitable for frequent use, and has poor user experience. question

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