CN215017903U

CN215017903U - Ultrasonic wave fetal heart rate monitoring devices

Info

Publication number: CN215017903U
Application number: CN202023167466.0U
Authority: CN
Inventors: 马云东
Original assignee: Jiangsu Yuyue Medical Equipment and Supply Co Ltd; Jiangsu Yuyue Information System Co Ltd; Suzhou Yuyue Medical Technology Co Ltd; Suzhou Medical Appliance Factory; Nanjing Yuyue Software Technology Co Ltd
Current assignee: Jiangsu Yuyue Medical Equipment and Supply Co Ltd; Jiangsu Yuyue Information System Co Ltd; Suzhou Yuyue Medical Technology Co Ltd; Suzhou Medical Appliance Factory; Nanjing Yuyue Software Technology Co Ltd
Priority date: 2020-12-24
Filing date: 2020-12-24
Publication date: 2021-12-07
Anticipated expiration: 2030-12-24

Abstract

An ultrasonic fetal heart rate monitoring device comprises a fetal heart signal acquisition module, a singlechip module, a sound playing module and a power supply module; the fetal heart signal acquisition module acquires the fetal heart rate to form an analog circuit signal and outputs the analog circuit signal to the single chip microcomputer module; the single chip microcomputer module comprises a sampling unit and an output unit, wherein the sampling unit samples an input analog circuit signal to obtain a digital audio signal, and the digital audio signal is output to the sound playing module through the output unit to be played; the single chip microcomputer module further comprises an equalizer unit, the equalizer unit is connected between the sampling unit and the output unit, and the digital audio signals are output through the output unit after the tone quality of the digital audio signals is adjusted through the equalizer unit. The problem of the unable foetus heartbeat audio tone quality that adjusts the acquisition of current fetus-voice meter can be solved to this scheme.

Description

Ultrasonic wave fetal heart rate monitoring devices

Technical Field

The utility model relates to the technical field of medical equipment, in particular to fetus heart rate monitoring devices.

Background

A fetal heart rate monitoring device, namely a fetal heart rate instrument, is an instrument for acquiring fetal heart motion information from the abdomen of a pregnant woman according to the Doppler principle, and medical personnel monitor the fetal heart motion through the fetal heart rate instrument to evaluate whether the intrauterine condition of a fetus is normal or not, so that corresponding treatment is performed.

The existing fetal heart monitor can directly output the acquired fetal heartbeat audio to a playing device for playing, and cannot adjust the tone quality of the audio; however, the directly acquired fetal heartbeat audio is quite stuffy in hearing sense, and can be uncomfortable to hear, and medical personnel can not distinguish and judge the fetal heartbeat condition.

Disclosure of Invention

The utility model provides an ultrasonic wave foetus rhythm of heart monitoring devices, its purpose is to solve the unable problem of adjusting the foetus heartbeat audio tone quality who acquires of current foetus heart appearance.

In order to achieve the above purpose, the utility model adopts the technical scheme that: an ultrasonic fetal heart rate monitoring device comprises a fetal heart signal acquisition module, a singlechip module, a sound playing module and a power supply module; the fetal heart signal acquisition module acquires the fetal heart rate to form an analog circuit signal and outputs the analog circuit signal to the single chip microcomputer module; the single chip microcomputer module comprises a sampling unit and an output unit, wherein the sampling unit samples an input analog circuit signal to obtain a digital audio signal, and the digital audio signal is output to the sound playing module through the output unit to be played; the innovation lies in that: the single chip microcomputer module further comprises an equalizer unit, the equalizer unit is connected between the sampling unit and the output unit, and the digital audio signals are output through the output unit after the tone quality of the digital audio signals is adjusted through the equalizer unit.

Preferably, the output unit is a digital-to-analog conversion audio output unit, and the digital audio signal is adjusted by the equalizer unit and then output to the sound playing module through the digital-to-analog conversion audio output unit.

Preferably, the sampling unit is a pulse code modulation audio sampling unit.

Preferably, the device also comprises a display module, and the singlechip module also comprises a processing unit; and the digital audio signals sampled by the sampling unit are processed by the processing unit to obtain heart rate value data, and the heart rate value data is output to the display module for display. Further, the processing unit performs operation processing on the digital audio signal through a short-time average amplitude difference algorithm.

Preferably, the device further comprises a filter circuit, the filter circuit is connected between the fetal heart signal acquisition module and the single chip microcomputer module, and analog circuit signals of the fetal heart signal acquisition module are filtered by the filter circuit and then output to the single chip microcomputer module.

Preferably, the device further comprises an amplifying circuit, the amplifying circuit is connected between the fetal heart signal acquisition module and the single chip microcomputer module, and an analog circuit signal of the fetal heart signal acquisition module is amplified by the amplifying circuit and then output to the single chip microcomputer module.

Preferably, the fetal heart signal acquisition module comprises an ultrasonic transmitting circuit, an ultrasonic receiving circuit and piezoelectric ceramics, wherein the ultrasonic transmitting circuit drives the piezoelectric ceramics to generate ultrasonic waves, and the piezoelectric ceramics receives ultrasonic wave echoes to the ultrasonic receiving circuit to obtain analog circuit signals.

The utility model discloses a design principle and effect: in order to solve the problem that the traditional fetal heart monitor cannot adjust the tone quality of the acquired fetal heartbeat audio, an equalizer unit is added in a single chip microcomputer module and is arranged between a sampling unit and an output unit, and digital audio signals acquired by the sampling unit are firstly subjected to tone quality adjustment through the equalizer unit and then output to a sound playing module through the output unit for playing; from this, the unable problem of adjusting tone quality of current fetus-voice meter has been solved to this scheme, and the user can adjust the tone quality of the audio frequency that finally listened to through balanced device unit to avoid the original comparatively vexed tone quality influence to the resolution of foetus heartbeat, make the user obtain good use simultaneously and experience.

Drawings

Fig. 1 is a working principle diagram of the present invention.

In the above drawings: 1. an ultrasonic transmission circuit; 2. piezoelectric ceramics; 3. an ultrasonic receiving circuit; 4. a filter amplifier circuit; 5. a single chip module; 6. a display module; 7. a sound playing module; 8. a power supply module; 51. an equalizer unit; 52. an output unit; 53. a sampling unit; 54. and a processing unit.

Detailed Description

The invention will be further described with reference to the following drawings and examples:

in the embodiment shown in fig. 1, the ultrasonic fetal heart rate monitoring device comprises a fetal heart signal acquisition module, a single chip microcomputer module 5 (i.e. an MCU), a sound playing module 7 and a power supply module 8.

The fetal heart signal acquisition module is used for acquiring fetal heart rate, forming an analog circuit signal and outputting the analog circuit signal to the single chip microcomputer module 5.

In this embodiment, the single chip microcomputer module 5 adopts an ARM company ISD9100 series audio system-level chip, and the specific model is ISD 9126X; the single chip microcomputer module 5 includes a sampling unit 53, an equalizer unit 51 (the EQ equalizer shown in fig. 1), and an output unit 52, where the sampling unit 53 samples an input analog circuit signal to obtain a digital audio signal, the equalizer unit 51 is connected between the sampling unit 53 and the output unit 52, and the digital audio signal is output through the output unit 52 after the tone quality of the digital audio signal is adjusted by the equalizer unit 51, and is finally output to the sound playing module 7 for playing.

The power module 8 is used for supplying power to all modules of the ultrasonic fetal heart rate monitoring device.

From this, this ultrasonic wave foetus rhythm of heart monitoring devices can adjust digital audio signal through equalizer unit 51, changes the sound tone quality that finally hears from sound play module 7, reaches the sound output effect of ideal to avoid originally comparatively vexed tone quality influence to the resolution of foetus heartbeat, make the user obtain good use simultaneously and experience.

The user can also freely adjust different parameters of the equalizer unit 51 according to the user's needs, and finally output the sound conforming to the user's personal taste.

In this embodiment, the output unit 52 is a digital-to-analog conversion audio output unit 52 (i.e., a DAC audio output unit), and digital audio signals are adjusted by the equalizer unit 51 and then output to the sound playing module 7 through the DAC audio output unit.

In this embodiment, the sampling unit 53 is a pulse code modulation audio sampling unit 53 (i.e., a PCM audio sampling unit), and the PCM audio sampling unit has a sampling precision of 16 bits, so that a finer and more real audio signal can be formed, and the accuracy of fetal heart detection is improved.

In addition, the ultrasonic fetal heart rate monitoring device also comprises a display module 6, and the singlechip module 5 also comprises a processing unit 54; the digital audio signal sampled by the sampling unit 53 is divided into two paths, one path is output to the sound playing module 7 through the equalizer unit 51, and the other path is processed by the processing unit 54 to obtain heart rate value data and finally output to the display module 6 for display; wherein, display module 6 can show heart rate value data through modes such as wave form or numerical value, gives the more audio-visual foetus heartbeat information of user.

Further, the processing unit 54 performs arithmetic processing on the digital audio signal by using a short-time average amplitude difference algorithm (i.e., AMDF algorithm); the AMDF algorithm is a fundamental tone detection algorithm, which is used for calculating the average amplitude difference function of a voice signal and estimating the fundamental tone by the valley value of an AMDF curve at the integral multiple of the fundamental tone period; multiplication operation can be avoided through the AMDF algorithm, and the calculated amount and the data amount of the MCU are reduced.

In addition, the ultrasonic fetal heart rate monitoring device also comprises a filtering and amplifying circuit 4, wherein the filtering and amplifying circuit 4 simultaneously comprises the effects of a filtering circuit and an amplifying circuit, the filtering and amplifying circuit 4 is connected between the fetal heart signal acquisition module and the singlechip module 5, and an analog circuit signal of the fetal heart signal acquisition module is filtered and amplified by the filtering and amplifying circuit 4 and then is output to the singlechip module 5; the filtering and amplifying circuit 4 can eliminate noise interference and amplify effective information, thereby improving the accuracy of the fetal heart frequency detection result.

In this embodiment, the fetal heart signal acquisition module includes an ultrasonic transmission circuit 1, an ultrasonic receiving circuit 3, and a piezoelectric ceramic 2, where the ultrasonic transmission circuit 1 drives the piezoelectric ceramic 2 to generate ultrasonic waves, and the piezoelectric ceramic 2 receives ultrasonic echoes to the ultrasonic receiving circuit 3 to obtain analog circuit signals.

The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose of the embodiments is to enable people skilled in the art to understand the contents of the present invention and to implement the present invention, which cannot limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered by the protection scope of the present invention.

Claims

1. An ultrasonic fetal heart rate monitoring device comprises a fetal heart signal acquisition module, a singlechip module (5), a sound playing module (7) and a power supply module (8);

the fetal heart signal acquisition module acquires the fetal heart rate to form an analog circuit signal and outputs the analog circuit signal to the single chip microcomputer module (5);

the single chip microcomputer module (5) comprises a sampling unit (53) and an output unit (52), wherein the sampling unit (53) samples an input analog circuit signal to obtain a digital audio signal, and the digital audio signal is output to the sound playing module (7) through the output unit (52) to be played;

the method is characterized in that: the single chip microcomputer module (5) further comprises an equalizer unit (51), the equalizer unit (51) is connected between the sampling unit (53) and the output unit (52), and the digital audio signals are output through the output unit (52) after the tone quality of the digital audio signals is adjusted through the equalizer unit (51).

2. An ultrasonic fetal heart rate monitoring device as claimed in claim 1 wherein: the output unit (52) is a digital-to-analog conversion audio output unit (52), and digital audio signals are output to the sound playing module (7) through the digital-to-analog conversion audio output unit (52) after being adjusted by the equalizer unit (51).

3. An ultrasonic fetal heart rate monitoring device as claimed in claim 1 wherein: the sampling unit (53) is a pulse code modulation audio sampling unit (53).

4. An ultrasonic fetal heart rate monitoring device as claimed in claim 1 wherein: the device also comprises a display module (6), and the singlechip module (5) also comprises a processing unit (54); the digital audio signals sampled by the sampling unit (53) are processed by the processing unit (54) to obtain heart rate value data, and the heart rate value data are output to the display module (6) for display.

5. An ultrasonic fetal heart rate monitoring device as claimed in claim 4 wherein: the processing unit (54) performs arithmetic processing on the digital audio signal through a short-time average amplitude difference algorithm.

6. An ultrasonic fetal heart rate monitoring device as claimed in claim 1 wherein: the device also comprises a filter circuit, wherein the filter circuit is connected between the fetal heart signal acquisition module and the singlechip module (5), and analog circuit signals of the fetal heart signal acquisition module are filtered by the filter circuit and then output to the singlechip module (5).

7. An ultrasonic fetal heart rate monitoring device as claimed in claim 1 wherein: the device also comprises an amplifying circuit, wherein the amplifying circuit is connected between the fetal heart signal acquisition module and the single chip microcomputer module (5), and an analog circuit signal of the fetal heart signal acquisition module is amplified by the amplifying circuit and then is output to the single chip microcomputer module (5).

8. An ultrasonic fetal heart rate monitoring device as claimed in any one of claims 1 to 7 wherein: the fetal heart signal acquisition module comprises an ultrasonic transmitting circuit (1), an ultrasonic receiving circuit (3) and piezoelectric ceramics (2), wherein the ultrasonic transmitting circuit (1) drives the piezoelectric ceramics (2) to generate ultrasonic waves, and the piezoelectric ceramics (2) receive ultrasonic echo waves and then the ultrasonic receiving circuit (3) obtains analog circuit signals.