CN103705270B - Fetal rhythm monitoring equipment - Google Patents
Fetal rhythm monitoring equipment Download PDFInfo
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- CN103705270B CN103705270B CN201210370905.9A CN201210370905A CN103705270B CN 103705270 B CN103705270 B CN 103705270B CN 201210370905 A CN201210370905 A CN 201210370905A CN 103705270 B CN103705270 B CN 103705270B
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Abstract
The invention provides a kind of fetal rhythm monitoring equipment, it is characterized in that, comprise sensing node and Personal gateway, wherein, described sensing node does not initiatively launch ultrasound wave to fetus, but gather the sound on her abdominal surface passively or vibrate to obtain fetal heart rate signal, and wirelessly send to described Personal gateway; Described Personal gateway, processes for the fetal heart rate signal sent described sensing node, obtains Fetal Heart Rate.By this equipment, anemia of pregnant woman can the health status of long-time wireless monitor fetus at home voluntarily, uses the monitoring of the passive type fetal heart sound of sensor to there is not health threat to fetus, be particularly useful for the monitoring to high risk gravida.
Description
Technical field
The invention belongs to electronic equipment and digital processing field, particularly a kind of fetal rhythm monitoring equipment that can carry out long-time passive type monitoring.
Background technology
At anemia of pregnant woman's phenolics, especially conceived middle and advanced stage, guards the indices of fetus, can understand fetus health status in uterus, find the exception of fetus early.Monitoring fetal rhythm is mainly in order to obtain the real-time heart rate of fetus, and whether fetal heart frequency is normal, is the important indicator judging fetus whether anoxia in parent.Therefore fetal rhythm monitoring is the big event checked in the pregnancy period.
At present fetal rhythm monitoring is carried out to fetus and mainly adopt Doppler ultrasonography on monitoring.The principle of Doppler ultrasonography on monitoring uses to launch hyperacoustic probe, ultrasound wave is launched in position to heart of fetus, when ultrasound wave runs into the heart of motion and reflection occurs, due to Doppler effect, return wave frequency and slight change can occur, carry out echo-signal calculating the heart rate that can obtain fetus.Initiatively launch ultrasound wave due to Doppler ultrasonography on monitoring to detect, effectively can detect the faint heartbeat of fetus, high to the heart rate analysis accuracy of fetus, be therefore widely adopted in fetal rhythm monitoring.
But ultrasound wave has certain heat effect and acoustic effect to tissue, potential harm may be had to the health of fetus, therefore should be controlled the time that fetus carries out ultrasonic monitoring.If wish to realize long-time continual monitoring to fetal rhythm, with the health and fitness information of Real-time Obtaining fetus, use doppler ultrasound is not a desirable selection.In addition, the fetal heart monitoring of Hospitals at Present routine was at about 20 minutes, and conceived 30 weeks later every needing in one to two weeks to carry out once to hospital.And for high risk gravida, then need to guard more frequently, even need to be in hospital in advance, bring larger inconvenience to anemia of pregnant woman and household, many anemia of pregnant woman wish the health status can understanding fetus at home at any time.And portable electronic fetal heart monitor common at present all uses Doppler ultrasonography on monitoring, the ultrasound wave dosage of some of them equipment use, not through strict test and supervision, likely causes harmful effect to foetus health.
Before doppler ultrasound foetus ECG monitor is not universal, traditional tire sound auscultation equipment is often adopted to the monitoring of fetal rhythm, comprises wooden fetal heart telephone receiver and stethoscope.Based on auscultation passive detection method to fetal well-being can't harm, but owing to cannot amplify and record acoustical signal, therefore gradually replace by doppler ultrasound equipment.Along with the development of sensor technology, if the detection method of the passive type of sensor can be adopted, acoustic sensor is such as used to collect the acoustical signal of parent abdominal part and adopt the method for signal processing to calculate fetal heart frequency, just can realize the long-time continual monitoring to fetus, and safety is high, with low cost.
Summary of the invention
(1) technical problem to be solved
The present invention is directed to existing doppler ultrasound fetal heart sound and monitor the safety issue that may exist, proposing a kind of without the need to adopting hyperacoustic passive type fetal rhythm monitoring equipment.
(2) technical scheme
The invention provides a kind of fetal rhythm monitoring equipment, comprise sensing node and Personal gateway, wherein, described sensing node, initiatively do not launch ultrasound wave to fetus, but gather the sound on her abdominal surface passively or vibrate to obtain fetal heart rate signal, and wirelessly send to described Personal gateway; Described Personal gateway, processes for the fetal heart rate signal sent described sensing node, obtains Fetal Heart Rate.
More preferably, described Personal gateway, is further used for being connected with wide area network, sends described Fetal Heart Rate to external processing apparatus.
Further, described sensing node comprises: sensor and Transmit-Receive Unit, and wherein, described sensor, for gathering described fetal heart rate signal, and is converted into the signal of telecommunication by described fetal heart rate signal, and the described signal of telecommunication is sent to described Transmit-Receive Unit; Described Transmit-Receive Unit, for being sent to described Personal gateway by the signal of telecommunication received from described sensor.
More preferably, described sensing node also comprises signal processing unit further, described sensor, is further used for gathering described fetal heart rate signal, and described fetal heart rate signal is converted into the signal of telecommunication, and the described signal of telecommunication is sent to described signal processing unit; Described signal processing unit, for carrying out preliminary treatment to the described signal of telecommunication, process here comprises filtering, denoising, heart rate calculating, and the signal of telecommunication after process is sent to described Transmit-Receive Unit; Described Transmit-Receive Unit, is further used for the signal of telecommunication received from described signal processing unit to be sent to described Personal gateway.
More preferably, described signal processing unit is single-chip microcomputer or DSP.
More preferably, described sensor is acoustic sensor.
More preferably, described sensor is piezoelectric transducer.
More preferably, described sensor comprises AD conversion unit further, for described fetal heart rate signal is converted into digital electric signal.
More preferably, described Transmit-Receive Unit is bluetooth module; Described Personal gateway is smart mobile phone.
(3) beneficial effect
The monitoring equipment that the present invention proposes, adopts the detection method of the passive type of sensor, has the features such as safety is high, portability is strong.Use this equipment, anemia of pregnant woman just can carry out effective long-time passive type monitoring to fetus at home, and send fetal heart rate data to external equipment by network, thus the remote assistance of doctor can be obtained, for growing up healthy and sound of fetus provides strong guarantee.
Accompanying drawing explanation
Fig. 1 is the fetal rhythm monitoring equipment figure provided in the embodiment of the present invention;
Fig. 2 is the block diagram of the sensing node of the fetal rhythm monitoring equipment provided in the embodiment of the present invention;
Fig. 3 is that in the embodiment of the present invention, sensing node transmits data and the schematic diagram interconnected with wide area network with the smart mobile phone as Personal gateway;
Fig. 4 is that in the embodiment of the present invention, sensing node transmits data and the schematic diagram interconnected with wide area network with the smart mobile phone installing the first Transmit-Receive Unit circuit board additional;
Fig. 5 is sensing node and Personal gateway equipment transfering data the schematic diagram interconnected with wide area network in the embodiment of the present invention;
Fig. 6 is the flow chart of Fetal Heart Rate acquisition methods in the embodiment of the present invention;
Fig. 7 is the schematic diagram of a kind of fetal heartbeat pattern that the embodiment of the present invention provides;
Fig. 8 is design sketch fetal heart rate signal being carried out to pattern match that the embodiment of the present invention provides;
Detailed description of the invention
Below in conjunction with drawings and Examples, the specific embodiment of the present invention is described in further detail.
The invention provides a kind of fetal rhythm monitoring system, comprise sensing node and Personal gateway.
As shown in Figure 2, sensing node comprises sensor, Transmit-Receive Unit to the structured flowchart of fetal heart sound monitoring sensing node.Wherein, sensor, for fetal heart rate signal is converted into the signal of telecommunication, anyly can change into the signal of telecommunication by acoustical signal or vibration signal, and the sensor with enough sensitivity all can be used for implementing this programme.
More preferably, the present invention can adopt acoustic sensor, as used high sensitivity mike.High sensitivity mike is formed primarily of taper resonator cavity and electret microphone.Taper resonator cavity center is cavity structure, can effectively gather faint fetal heart sound signal.Embed a highly sensitive electret microphone at the bottom center place of taper resonator cavity, acoustical signal can be converted into the signal of telecommunication and export by this mike.
More preferably, the present invention also can adopt piezoelectric type thin film sensor, piezoelectric transducer is close to the skin on her abdominal surface, when heart of fetus is beated and is passed to her abdominal surface, vibration can be caused, piezoelectric type thin film perception can vibrate the pressure change caused, and this pressure signal is converted into signal of telecommunication output.
When using fetal rhythm monitoring equipment of the present invention, because fetus has certain motion in uterus, therefore at parent abdominal part, heart of fetus is beated, and the strongest position neither fix, and anemia of pregnant woman can obtain best monitoring effect by the position of adjustment sensor.
More preferably, sensor is further containing AD conversion unit, and be converted into digital electric signal for the fetal heart rate signal exported by sensor, the signal processing circuit being beneficial to rear end processes fetal heart sound signal.
Transmit-Receive Unit, for the data collected are transferred to Personal gateway, so that user preserves data, for further medical analysis process.More preferably, described Transmit-Receive Unit adopts wireless mode that the data collected are transferred to described Personal gateway.
More preferably, sensing node is except sensor and Transmit-Receive Unit, and all right signalization processing unit further, for processing fetal heart rate signal, and extracts Fetal Heart Rate.Signal processing unit can adopt single-chip microcomputer or DSP, carries out preliminary process to fetal heart sound signal, and process here can comprise filtering, denoising, heart rate calculating etc., but be not limited to above aspect, then be delivered to Personal gateway by Transmit-Receive Unit, wherein, DSP is digital signal processor.Also untreated fetal heart sound signal can be directly delivered to Personal gateway, carry out fetal heart rate signal process by Personal gateway, extract Fetal Heart Rate.
Data transmission between the Transmit-Receive Unit of sensing node and Personal gateway can have multiple implementation, provides three kinds of examples at this:
As shown in Figure 3, the Transmit-Receive Unit of sensing node adopts bluetooth module to the first scheme, using smart mobile phone as Personal gateway, carries out radio communication between the two by Bluetooth protocol.By the radio communication between smart mobile phone, the real-time heart rate of fetal rhythm data and fetus can be sent on smart mobile phone and to preserve by sensing node, and anemia of pregnant woman and household can see the real-time heart rate curve of fetus on smart mobile phone.Meanwhile, anemia of pregnant woman can pass through network, the fetal heart rate data that mobile phone is preserved is passed to doctor or is sent in the terminal unit of hospital.According to the heart rate data change curve of fetus, doctor can judge whether fetus occurs exception.
First scheme as shown in Figure 4, in this programme, the wireless transmit/receive units of sensing node adopts radio receiving transmitting module, the first Transmit-Receive Unit circuit board is installed behind additional as Personal gateway at smart mobile phone, first Transmit-Receive Unit circuit board comprises wireless transmit/receive units, MCU and USB joint, wherein, MCU is single-chip microcomputer; Described smart mobile phone is connected by USB joint with the first described Transmit-Receive Unit circuit board.Radio receiving transmitting module and smart mobile phone carry out radio communication between the two, and data are transferred to outside treatment facility further and are undertaken by network by smart mobile phone, identical with the first scheme.
The third scheme as shown in Figure 5, the wireless transmit/receive units of sensing node adopts radio receiving transmitting module, Personal gateway adopts and comprises wireless transmit/receive units, memory element, MCU, power managed module and carry out the equipment of mutual general-purpose interface with wide area network, and sensing node wirelessly communicates with Personal gateway.Personal gateway sends fetal heart rate data to external processing apparatus by wide area network.By this scheme, user no longer needs to use smart mobile phone to carry out data transmission, extends the suitability of this fetal rhythm monitoring equipment.
This equipment can obtain Fetal Heart Rate with Fetal Heart Rate acquisition methods below, but the signal processing method obtaining Fetal Heart Rate is not limited thereto, and as shown in Figure 6, is a kind of flow chart of Fetal Heart Rate preparation method.
S1, the frequency domain characteristic of fetal heart rate signal to be analyzed.
S2, the noise of suppression not in fetal heart rate signal effective band.The effective band of fetal heart rate signal, between 20 ~ 130Hz, by restraint speckle, can improve signal to noise ratio.
S3, the signal calculated energy in a predetermined time window.For original cardiechema signals, each hear sounds clapped can continue for some time length, shows in time domain it is the waveform repeatedly shaken near null value, generally there is multiple crest and trough, make to determine that the accurate location of hear sounds beat has difficulties.The instantaneous energy of the energy of signal calculated in a predetermined time window, contributes to the accurate location determining hear sounds beat.Represent the instantaneous energy of signal by the meansigma methods of signal in a scheduled time window square in this step.
S4, determine the crest of instantaneous energy signal.The crest place of instantaneous energy signal is the fetal heart sound intensity maximum moment, in this, as the position of heart beating beat.
S5, obtain initial heart rate by pattern match, determine fetus heart rate range roughly.A fixing pattern is generally followed in the heart beating of fetus, and as shown in Figure 7, namely a heart beat cycle is formed primarily of two sound heart beatings, and they are first heart sound and second heart sound respectively.General first heart sound is less than the interval of second heart sound to the first heart sound of next heart beat cycle to the interval of second heart sound.By the method for parameter scanning, determine the best heart pattern of current cardiechema signals, then process containing noisy cardiechema signals according to this best heart pattern, identify the cardiechema signals meeting this best heart pattern, screen out noise jamming, its implementation result as shown in Figure 8.The average heart rate of fetus is calculated again according to the result of pattern match.
S6, based on back obtain average heart rate and heart pattern, pattern match is carried out to follow-up fetal heart rate signal.The average heart rate obtained based on back and heart pattern, can proceed pattern match to the fetal heart rate signal in follow-up 4 heart beat cycles.Because the change of heart rate in 4 heart beat cycles is very little, therefore can directly adopt average heart rate obtained in the previous step and heart pattern.Based on the Data Update average heart rate of current 4 heart beat cycles and heart pattern after coupling terminates, be used further to the pattern match of following 4 heart beat cycles.
The real-time heart rate of S7, calculating fetus.The method calculating the real-time heart rate of fetus obtains the peak-to-peak distance of normal coupling ripple of a heart beat cycle of being separated by, and can obtain the time span of heart beat cycle.Heart beat cycle number in one minute is real-time heart rate.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the prerequisite not departing from the technology of the present invention principle; can also make some improvement and replacement, these improve and replace and also should be considered as protection scope of the present invention.
Claims (2)
1. a fetal rhythm monitoring equipment, is characterized in that, comprises sensing node and Personal gateway, wherein,
Described sensing node, does not initiatively launch ultrasound wave to fetus, but gathers the sound on her abdominal surface passively or vibrate to obtain fetal heart rate signal, and wirelessly sends to described Personal gateway;
Described sensing node comprises: sensor, Transmit-Receive Unit and signal processing unit, wherein,
Described sensor, for gathering described fetal heart rate signal, and is converted into the signal of telecommunication by described fetal heart rate signal, and the described signal of telecommunication is sent to described signal processing unit; Described signal processing unit, for carrying out preliminary treatment to the described signal of telecommunication, process here comprises filtering, denoising, heart rate calculating, and the signal of telecommunication after process is sent to described Transmit-Receive Unit;
Described Transmit-Receive Unit, is further used for the signal of telecommunication received from described signal processing unit to be sent to described Personal gateway;
Described sensor adopts acoustic sensor; Described acoustic sensor is made up of taper resonator cavity and electret microphone, described taper resonator cavity center is cavity structure, gather fetal heart sound signal, embed an electret microphone at the bottom center place of described taper resonator cavity, acoustical signal is converted into the signal of telecommunication and exports by described electret microphone;
Described signal processing unit is single-chip microcomputer or DSP;
Described Transmit-Receive Unit is bluetooth module;
Described Personal gateway, processes for the fetal heart rate signal sent described sensing node, obtains Fetal Heart Rate;
Described Personal gateway adopts and comprises wireless transmit/receive units, memory element, MCU, power managed module and carry out the equipment of mutual general-purpose interface with wide area network; Described Personal gateway is connected with wide area network by described general-purpose interface, sends described Fetal Heart Rate to external processing apparatus;
Or described Personal gateway adopts the first Transmit-Receive Unit circuit, described first Transmit-Receive Unit circuit comprises wireless transmit/receive units, MCU and USB joint, and smart mobile phone is connected by USB joint with the first described Transmit-Receive Unit circuit board;
Or described Personal gateway is smart mobile phone.
2. fetal rhythm monitoring equipment as claimed in claim 1, it is characterized in that, described sensor comprises AD conversion unit further, for described fetal heart rate signal is converted into digital electric signal.
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| CN201210370905.9A CN103705270B (en) | 2012-09-28 | 2012-09-28 | Fetal rhythm monitoring equipment |
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| CN104586428B (en) * | 2015-01-04 | 2017-06-27 | 张敏 | Fetal heartbeat sound pickup device |
| CN105708437A (en) * | 2015-08-03 | 2016-06-29 | 美的集团股份有限公司 | Fetal heart monitoring device |
| CN106137168A (en) * | 2016-07-28 | 2016-11-23 | 传世未来（北京）信息科技有限公司 | A kind of fetus monitoring method and foetal monitor |
| CN106491116A (en) * | 2016-11-11 | 2017-03-15 | 深圳市响音科技有限公司 | A kind of passive type fetal rhythm detecting system and detection method |
| CN109106397A (en) * | 2017-06-25 | 2019-01-01 | 吴健康 | A kind of monitoring of fetal heart sound and analysis system |
| CN107157474B (en) * | 2017-06-27 | 2020-04-28 | 西南医科大学 | Portable multicytosis electrocardioscanner and monitoring method thereof |
| CN108245224B (en) * | 2018-01-30 | 2020-07-24 | 济南市第四人民医院 | Minimally invasive surgery forceps convenient to carry and capable of automatically searching heart |
| CN108703750A (en) * | 2018-05-23 | 2018-10-26 | 江苏信臣健康科技股份有限公司 | A kind of passive type fetal rhythm monitoring assembly and equipment |
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