CN105708498A - Intelligent fetal heart sound monitoring instrument and monitoring method - Google Patents
Intelligent fetal heart sound monitoring instrument and monitoring method Download PDFInfo
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- CN105708498A CN105708498A CN201610038811.XA CN201610038811A CN105708498A CN 105708498 A CN105708498 A CN 105708498A CN 201610038811 A CN201610038811 A CN 201610038811A CN 105708498 A CN105708498 A CN 105708498A
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- fetal heart
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/72—Signal processing specially adapted for physiological signals or for diagnostic purposes
- A61B5/7203—Signal processing specially adapted for physiological signals or for diagnostic purposes for noise prevention, reduction or removal
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B8/00—Diagnosis using ultrasonic, sonic or infrasonic waves
- A61B8/08—Detecting organic movements or changes, e.g. tumours, cysts, swellings
- A61B8/0866—Detecting organic movements or changes, e.g. tumours, cysts, swellings involving foetal diagnosis; pre-natal or peri-natal diagnosis of the baby
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B8/00—Diagnosis using ultrasonic, sonic or infrasonic waves
- A61B8/08—Detecting organic movements or changes, e.g. tumours, cysts, swellings
- A61B8/0883—Detecting organic movements or changes, e.g. tumours, cysts, swellings for diagnosis of the heart
Abstract
The invention discloses an intelligent fetal heart sound monitoring instrument and a monitoring method, and belongs to a fetal heart sound monitoring technology. The intelligent fetal heart sound monitoring instrument comprises a conical shell with two ends opened, a cover body which is connected to the relatively small opening end of the shell in a sealed mode, a sound sensor which is arranged on the inner wall of the shell and a differential system, wherein the sound sensor comprises a first acquisition end face and a second acquisition end face; the first acquisition end face is arranged in a mode of keeping contact with the inner wall of the shell; and the differential system is configured to conduct differential treatment on fetal heart sound signals acquired by the first acquisition end face and the second acquisition end face. By arranging the first acquisition end face and the second acquisition end face for acquiring the fetal heart sound signals on the sound sensor in a reverse mode, interference sound signals acquired by the first acquisition end face and the second acquisition end face are equivalent and the fetal heart sound signal acquired by the first acquisition end face is much greater than the fetal heart sound signal acquired by the second acquisition end face, and then, through the differential treatment of the differential system, a fetal heart sound signal with a higher signal-to-noise ratio is obtained, so that the accuracy of acquiring the fetal heart sound signal is improved.
Description
Technical field
The present invention relates to fetal heart sound monitoring technology, be specifically related to a kind of intelligence fetal heart sound monitor and monitoring method.
Background technology
Fetal heart sound has contained abundant physiologic information, is one of important indicator judging foetus health situation.Anemia of pregnant woman's period of gestation, if fetus in uterus occurs that unusual condition will its dysplasia even fetal asphyxia.It is therefore desirable to fetus to be performed continuously over fetal heart sound monitoring, upgrowth situation of fetus can be judged on the one hand according to this, fetus also can be prevented on the other hand to occur unexpected.
Current fetal heart sound monitoring technology mainly has two kinds:
Doppler ultrasound detector for fetal heart sound, in medical institutions, most armarium adopts this technology to realize, and utilizes the Doppler effect monitoring fetal heart sound of ultrasonic signal.But the usual volume of this kind equipment is comparatively huge, expensive, it is necessary to the people with professional operation skill just can complete to measure, and human body is had a certain impact by ultrasonic radiation, is not suitable for carrying out long term monitoring.
Passive-type fetal heart sound monitor, this kind equipment realizes heart sound monitoring by catching fetal heart sound audio signal, and conventional passive-type fetal heart sound monitor often uses a set of stethoscope with bell auscultation head to realize, and its monitoring is disturbed that sound is big, accuracy is low.
Summary of the invention
It is an object of the invention to overcome above-mentioned technical deficiency, it is proposed to a kind of intelligence fetal heart sound monitor, its small volume, without Ultrasonic Radiation, suitable long term monitoring, and monitoring precision height；Meanwhile, the present invention also provides for a kind of intelligence fetal heart sound monitoring method.
For reaching above-mentioned technical purpose, technical scheme provides a kind of intelligence fetal heart sound monitor, including,
The tapered housing of one both ends open, wherein the radius of an opening is more than the radius of another opening；
The lid that the opening less with radius is tightly connected；
Be located at the sound transducer in described inner walls, described sound transducer include oppositely arranged and all for gather fetal heart sound signal first gather end face and second gather end face, and described first gather end face be contacted with described inner walls arrange；And
One differential system electrically connected with described sound transducer, described differential system carries out difference processing for gathering end face and the second fetal heart sound signal gathering end face collection to described first.
Preferably, described intelligence fetal heart sound monitor also includes one for wave filter that the interference tones signal in the fetal heart sound signal that processed by described differential system is filtered, one amplifier amplified for the fetal heart sound signal that will filter, a wireless transport module for the fetal heart sound signal of amplification is sent.
Preferably, described wave filter includes that the frequency range to fetal heart sound signal is outer and interference tones signal in frequency band is sequentially carried out the first wave filter and second wave filter of filtration.
Preferably, described intelligence fetal heart sound monitor also includes a rechargable power supplies for powering, and the quick-charging circuit being all connected with described power supply and discharge protection circuit.
Preferably, the larger open end that the radius of described housing is bigger is coated with silicone gasket, is provided with a branch of band in the middle part of the outer wall of described housing.
Preferably, described lid is provided with switch hole, is provided with press button in described switch hole.
Preferably, described intelligence fetal heart sound monitor also includes one for fetal heart sound signal carries out the after-treatment system of post processing, described after-treatment system includes one for coordinating the wireless reception module accepting the fetal heart sound signal that described wireless transport module sends, and one processes the heart rate processing module for Fetal Heart Rate for fetal heart sound signal wireless reception module accepted.
Preferably, described heart rate processing module includes one for filter unit that interference tones signal in the fetal heart sound signal that wireless reception module accepted is filtered, one carries out the peak detection unit of peakvalue's checking for the fetal heart sound signal filtered by described filter unit, a time domain average unit that peak value time domain average is Fetal Heart Rate for being detected by described peak detection unit.
Preferably, described after-treatment system also includes one for the spectroscopy processing module that signal procesing in time domain is spectrogram of fetal heart sound signal filtered by described filter unit and a warning module, and described warning module is for judging to carry out early warning when the Fetal Heart Rate obtained and spectrogram are for exception.
Preferably, described housing is stainless steel, and described lid is PVC material.
Meanwhile, the present invention also provides for a kind of intelligence fetal heart sound monitoring method, comprises the steps,
S1, gather end face and second by oppositely arranged the first of sound transducer and gather end face and gather fetal heart sound signal respectively；
S2, by first gather end face and second gather end face fetal heart sound signal carry out difference processing；
S3, by the fetal heart sound signal after difference processing interference tones signal filter；
S4, the fetal heart sound signal after filtering is filtered again after carry out peakvalue's checking, and the peak value of detection carried out time domain average obtain Fetal Heart Rate；
S5, the time-domain signal of fetal heart sound signal that step S3 obtains is converted to fetal heart sound spectrogram.
Compared with prior art, the present invention gathers end face by the first collection end face and second for gathering fetal heart sound signal oppositely arranged on sound transducer, making the first collection end face and the second interference tones signal gathering end face collection is equivalent, first fetal heart sound signal gathering end face collection then gathers the fetal heart sound signal that end face gathers much larger than second, and then by the difference processing of differential system, the fetal heart sound signal higher to obtain signal to noise ratio, improves the accuracy that fetal heart sound signal gathers.
Accompanying drawing explanation
Fig. 1 is the attachment structure schematic diagram of the intelligent fetal heart sound monitor of the present invention；
Fig. 2 is the connection block diagram of the intelligent fetal heart sound monitor of the present invention.
Detailed description of the invention
In order to make the purpose of the present invention, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein is only in order to explain the present invention, is not intended to limit the present invention.
Refer to Fig. 1, Fig. 2, The embodiment provides a kind of intelligence fetal heart sound monitor, including,
The tapered housing 1 of one both ends open, wherein the radius of an opening is more than the radius of another opening；
The lid 2 that the opening less with radius is tightly connected；
It is located at the sound transducer 3 on described housing 1 inwall, described sound transducer 3 includes oppositely arranged and equal first gathering end face 301 and second and gather end face 302 for gathering fetal heart sound signal, and described first gathers end face 301 and be contacted with described housing 1 inwall and arrange；And
One differential system 4 electrically connected with described sound transducer 3, described differential system 4 carries out difference processing for gathering end face 301 and the second fetal heart sound signal gathering end face 302 collection to described first.
The present embodiment gathers end face 302 by the first collection end face 301 and second for gathering fetal heart sound signal oppositely arranged on sound transducer 3, making the first collection end face 301 and the second interference tones signal gathering end face 302 collection is equivalent, first fetal heart sound signal gathering end face 301 collection then gathers the fetal heart sound signal that end face 302 gathers much larger than second, and then by the difference processing of differential system 4, the fetal heart sound signal higher to obtain signal to noise ratio, improves the accuracy that fetal heart sound signal gathers.
Sound transducer 3 can be assembled on housing 1 inwall by soft base PCB when specifically arranging, and ensure that the first collection end face 301 fits in housing 1 inwall, and second gathers end face 302 and housing 1 inwall is contactless, the acoustical signal realizing the first collection end face 301 collection is obtained by housing 1, and the second acoustical signal gathering end face 302 collection is obtained by air borne.In order to reduce the volume of the present embodiment monitor, sound transducer 3 can being set to two oppositely arranged MEMSMIC sensors, the sound signal collecting end face of two MEMSMIC sensors respectively first gathers end face 301 and the second collection end face 302.
The present embodiment is when specifically arranging, one main control board 5 can be set, this main control board 5 is located in housing 1 and arranges near lid 2, can just be located on described main control board 5 by differential system 4 simultaneously, in order to improve the accuracy of fetal heart sound signal further, avoid the noise of outside, the accuracy of the disturbed tests such as friction sound, the present embodiment is provided with one for wave filter 6 that the interference tones signal in the fetal heart sound signal that processed by described differential system 4 is filtered on described main control board 5, and for the ease of the transmission of signal filtered and extraction, main control board 4 is additionally provided with one and is used for, for the amplifier 7 amplified by the fetal heart sound signal of filtration and one, the wireless transport module 8 that sent by the fetal heart sound signal of amplification.
The filtration of fetal heart sound signal mainly includes the filtration of the interference tones signal of two aspects, it is the interference tones signal outside the frequency range of fetal heart sound signal on the one hand, it is the interference tones signal in the frequency band of fetal heart sound signal on the other hand, and in order to all be filtered out by above two interference tones signal, the described wave filter 6 of the present embodiment includes the interference tones signal outside the frequency range to fetal heart sound signal and in frequency band and is sequentially carried out the first wave filter 601 and the second wave filter 602 of filtration.Concrete, wherein, the first wave filter 601 is preferably FIR band filter, and the second wave filter is preferably Kalman filter.
Wireless transport module 8 preferably employs bluetooth, it is possible to adopt 3G or 4G wireless network transmissions.
The larger open end that the radius of the described housing 1 of the present embodiment is bigger is coated with silicone gasket 9, by the contact area arranging increase housing 1 and human body on the one hand of silicone gasket 9, reduce noise to be mixed into, thus improving the collection effect of sound transducer 3, increase the more comfortable of flesh human contact's housing 1 on the other hand.And wearing for the ease of user, it being provided with a branch of band 10 in the middle part of the outer wall of the described housing of this enforcement 1, this band ring 10 is arranged around housing 1 outer wall, in order to can be connected with band ring 10 by elastic cord when user is worn and then colligation is in user loins.
In order to increase the used persistence of the present embodiment intelligence fetal heart sound monitor, described in the present embodiment, intelligence fetal heart sound monitor also includes a rechargable power supplies 11 for powering, this power supply 11 specifically can adopt a capacity to be the lithium battery of 300mAh, and for the ease of the use of above-mentioned power supply 11 and its service life can be extended, intelligence fetal heart sound monitor is additionally provided with a quick-charging circuit being connected with described power supply 11 and discharge protection circuit, the chip that specifically model can be adopted to be S-8261 and FS8205, to realize discharge cut-off voltage for 3.7V, charging saturation voltage is 4.25V.Power supply 11 charging can adopt MicroUSB interface 12, interface 12 can be located on the sidewall of housing 1, and owing to power supply 11 is arranged near above-mentioned main control board 5, therefore the above-mentioned interface 12 of correspondence is arranged near lid 2.
Lid 2 is provided with switch hole 201, it is provided with press button 13 in described switch hole 201, press button 13 can be passed through and control the switch of monitor, specifically can pass through a control circuit and control, to realize completing the startup of monitor and stopping monitoring after the long switch 13 that touches the button reaches 3 seconds.
The service condition of monitor is observed for the ease of user, can arranging dual-colored LED lamp 14 on the outer wall of lid 2 or housing 1 to show, the present embodiment is preferably provided with on lid 2, specifically can adopt green and red display, namely, after monitor starts, green LED lamp is with the frequency scintillation of 0.5Hz；When long by when stopping monitoring, red LED lamp is glimmered 5 seconds continuously with 2Hz frequency, then turns off flicker.Additionally, realize above-mentioned dual-colored LED lamp 14 etc. also by a battery protecting circuit to observe the use state of power supply, being specially under charged state, red LED is with the frequency scintillation of 1Hz, after fully charged, and red LED Chang Liang；And when battery is in under-voltage condition, red and green LED is alternately glimmered with the frequency of 0.5Hz.Certainly, it is possible to be set to other flicker different implications of status representative, specifically can needing be configured according to operator, and above-mentioned be set to this area routine techniques, therefore not to repeat here.
Fetal heart sound signal is through gathering and after pre-treatment, plain mode can be passed through for the ease of user and accurately judge fetal heart sound information, also need to fetal heart sound signal is carried out later stage process, the fetal heart sound signal of the present embodiment collection can be used in combination with the later stage Treatment Analysis device of prior art, in order to fetal heart sound signal is converted to the understandable information of user.And the described intelligence fetal heart sound monitor body of the present embodiment provides a kind of after-treatment system 15 for fetal heart sound signal carries out post processing, described after-treatment system 15 includes one for coordinating the wireless reception module 151 accepting the fetal heart sound signal that described wireless transport module 8 sends, and one processes the heart rate processing module 152 for Fetal Heart Rate for fetal heart sound signal wireless reception module 151 accepted.Concrete, operation for the ease of user, after-treatment system 15 can be realized by a smart mobile phone APP, the fetal heart sound signal that above-mentioned wireless transport module 8 sends is accepted by smart mobile phone APP, and above-mentioned fetal heart sound signal is stored, then above-mentioned fetal heart sound signal can be processed as Fetal Heart Rate by user as required.Additionally, after-treatment system 15 realizes also by other-end certainly.
Wherein, described heart rate processing module 152 includes one for filter unit 152a that interference tones signal in the fetal heart sound signal that wireless reception module 151 accepted is filtered, one for carrying out the peak detection unit 152b of peakvalue's checking by the fetal heart sound signal that described filter unit 152a filters, one for by the described peak detection unit 152b time domain average unit 152c that peak value time domain average is Fetal Heart Rate detected, concrete, can just wireless reception module 151 accept fetal heart sound signal through high-pass digital filter filter after carry out peakvalue's checking, then carry out time domain average again and can obtain Fetal Heart Rate, this Fetal Heart Rate can be easy to user and directly observes, whether the Fetal Heart Rate of contrast fetus is abnormal.
Simultaneously, described after-treatment system 15 also includes one for by the spectroscopy processing module that signal procesing in time domain is spectrogram 153 of the described filter unit 152a fetal heart sound signal filtered and a warning module 154, and described warning module 154 is for judging to carry out early warning when the Fetal Heart Rate obtained and spectrogram are for exception.Concrete, can by the time-domain signal of fetal heart sound signal by being presented to user after fast Fourier transform in the way of spectrogram, in order to the observation of user, contrast.Warning module 153 is then the Fetal Heart Rate of above-mentioned acquisition and the data of spectrogram and normal fetus are analyzed, if occurring abnormal, then above-mentioned Fetal Heart Rate and spectrogram are checked, if the Fetal Heart Rate checked and spectrogram are still abnormal, then remind user fetus to be in abnormality, physiology shape body should be adjusted or detect to hospital.
The housing 1 of the present embodiment is stainless steel, and for the ease of the transmission of fetal heart sound signal, the lid 2 of the present embodiment is PVC material.
The intelligent specifically used flow process of fetal heart sound monitor of the present invention is as follows, first pass through the first collection end face 301 and the second collection end face 302 gathers fetal heart sound signal respectively, then gather end face 301 by first and the second fetal heart sound signal gathering end face 302 carries out difference processing, again by the interference tones target signal filter in the fetal heart sound signal after difference processing after difference processing, send after filtering to after-treatment system 15, after-treatment system 15 carries out peakvalue's checking after again being filtered by the fetal heart sound signal after filtration, and the peak value of detection is carried out time domain average acquisition Fetal Heart Rate, the time-domain signal of the fetal heart sound signal again filtered can be converted to fetal heart sound spectrogram by user as required simultaneously, judge that whether the Fetal Heart Rate of acquisition and spectrogram be abnormal finally by warning module 154, if abnormal, check, check still abnormal then to user early warning.
The detailed description of the invention of present invention described above, is not intended that limiting the scope of the present invention.Any technology according to the present invention is conceived made various other and is changed accordingly and deformation, should be included in the protection domain of the claims in the present invention.
Claims (10)
1. an intelligent fetal heart sound monitor, it is characterised in that include,
The tapered housing (1) of one both ends open, wherein the radius of an opening is more than the radius of another opening；
The lid (2) that the opening less with radius is tightly connected；
It is located at the sound transducer (3) on described housing (1) inwall, described sound transducer (3) include oppositely arranged and all for gather fetal heart sound signal first gather end face (301) and second gather end face (302), and described first gather end face (301) be contacted with described housing (1) inwall setting；And
One differential system (4) electrically connected with described sound transducer (3), the fetal heart sound signal that described differential system (4) gathers for described first collection end face (301) and second gather end face (302) carries out difference processing.
2. intelligence fetal heart sound monitor according to claim 1, it is characterized in that, described intelligence fetal heart sound monitor also includes one for wave filter (6) that the interference tones signal in the fetal heart sound signal that processed by described differential system (4) is filtered, one amplifier (7) amplified for the fetal heart sound signal that will filter, a wireless transport module (8) for the fetal heart sound signal of amplification is sent.
3. intelligence fetal heart sound monitor according to claim 2, it is characterized in that, described wave filter (6) includes the interference tones signal outside the frequency range to fetal heart sound signal and in frequency band and is sequentially carried out the first wave filter (601) and second wave filter (602) of filtration.
4. intelligence fetal heart sound monitor according to claim 3; it is characterized in that; described intelligence fetal heart sound monitor also includes a rechargable power supplies (11) for powering, and the quick-charging circuit being all connected with described power supply (11) and discharge protection circuit.
5. according to the arbitrary described intelligent fetal heart sound monitor of Claims 1 to 4, it is characterized in that, the opening that the radius of described housing (1) is bigger is coated with silicone gasket (9), is provided with a branch of band (10) in the middle part of the outer wall of described housing (1).
6. according to the arbitrary described intelligent fetal heart sound monitor of Claims 1 to 4, it is characterised in that described lid (2) is provided with switch hole (201), is provided with press button (13) in described switch hole (201).
7. intelligence fetal heart sound monitor according to claim 2, it is characterized in that, described intelligence fetal heart sound monitor also includes one for fetal heart sound signal carries out the after-treatment system (15) of post processing, described after-treatment system (15) includes one for coordinating the wireless reception module (151) accepting the fetal heart sound signal that described wireless transport module (8) sends, and one processes the heart rate processing module (152) for Fetal Heart Rate for fetal heart sound signal wireless reception module (151) accepted.
8. intelligence fetal heart sound monitor according to claim 7, it is characterized in that, described heart rate processing module (152) includes one for filter unit (152a) that interference tones signal in the fetal heart sound signal that wireless reception module (151) accepted is filtered, one for carrying out the peak detection unit (152b) of peakvalue's checking by the fetal heart sound signal that described filter unit (152a) filters, time domain average unit (152c) that peak value time domain average is Fetal Heart Rate for being detected by described peak detection unit (152b).
9. intelligence fetal heart sound monitor according to claim 8, it is characterized in that, described after-treatment system (15) also includes one for the spectroscopy processing module that signal procesing in time domain is spectrogram (153) of fetal heart sound signal filtered by described filter unit (152a) and a warning module (154), and described warning module (154) is for judging to carry out early warning when the Fetal Heart Rate obtained and spectrogram are for exception.
10. an intelligent fetal heart sound monitoring method, it is characterised in that described intelligence fetal heart sound monitoring method comprises the steps:
S1, gather end face (301) by oppositely arranged the first of sound transducer (3) and the second collection end face (302) gathers fetal heart sound signal respectively；
S2, by first gather end face (301) and second collection end face (302) fetal heart sound signal carry out difference processing；
S3, by the fetal heart sound signal after difference processing interference tones signal filter；
S4, the fetal heart sound signal after filtering is filtered again after carry out peakvalue's checking, and the peak value of detection carried out time domain average obtain Fetal Heart Rate；
S5, the time-domain signal of fetal heart sound signal that step S3 obtains is converted to fetal heart sound spectrogram.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108627177A (en) * | 2017-03-17 | 2018-10-09 | 卡西欧计算机株式会社 | Display device, electronic watch, display methods and computer readable storage medium |
| CN109223048A (en) * | 2018-10-31 | 2019-01-18 | 河南农业大学 | A method of prediction dog gestational age |
| CN109688933A (en) * | 2016-09-08 | 2019-04-26 | 皇家飞利浦有限公司 | Fetus size monitors system and method |
| CN110393512A (en) * | 2019-08-23 | 2019-11-01 | 苏州风尚智选医疗科技有限公司 | A kind of processing method of fetus-voice meter equipment and fetal heart rate signal |
| CN111227820A (en) * | 2020-02-21 | 2020-06-05 | 孙磊 | Fetal heart detection sensor matrix of multidimensional channel sensor and fetal heart detection equipment |
| CN111265237A (en) * | 2020-02-21 | 2020-06-12 | 孙磊 | Fetal heart monitoring system, device and method based on proximity calculation |
| CN111265242A (en) * | 2020-02-21 | 2020-06-12 | 孙磊 | Fetal heart monitoring system, device and method |
| CN111700636A (en) * | 2020-07-03 | 2020-09-25 | 广州呼吸健康研究院 | Electronic cardiopulmonary sound data labeling management method and device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109688933A (en) * | 2016-09-08 | 2019-04-26 | 皇家飞利浦有限公司 | Fetus size monitors system and method |
| CN108627177A (en) * | 2017-03-17 | 2018-10-09 | 卡西欧计算机株式会社 | Display device, electronic watch, display methods and computer readable storage medium |
| CN108627177B (en) * | 2017-03-17 | 2022-02-25 | 卡西欧计算机株式会社 | Display device, electronic timepiece, display method, and computer-readable storage medium |
| CN109223048A (en) * | 2018-10-31 | 2019-01-18 | 河南农业大学 | A method of prediction dog gestational age |
| CN110393512A (en) * | 2019-08-23 | 2019-11-01 | 苏州风尚智选医疗科技有限公司 | A kind of processing method of fetus-voice meter equipment and fetal heart rate signal |
| CN111227820A (en) * | 2020-02-21 | 2020-06-05 | 孙磊 | Fetal heart detection sensor matrix of multidimensional channel sensor and fetal heart detection equipment |
| CN111265237A (en) * | 2020-02-21 | 2020-06-12 | 孙磊 | Fetal heart monitoring system, device and method based on proximity calculation |
| CN111265242A (en) * | 2020-02-21 | 2020-06-12 | 孙磊 | Fetal heart monitoring system, device and method |
| CN111700636A (en) * | 2020-07-03 | 2020-09-25 | 广州呼吸健康研究院 | Electronic cardiopulmonary sound data labeling management method and device |
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