CN103767701A - Wearable fetal electrocardiogram monitoring system and method based on smart phones - Google Patents
Wearable fetal electrocardiogram monitoring system and method based on smart phones Download PDFInfo
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Abstract
The invention relates to a wearable fetal electrocardiogram monitoring system based on smart phones. The system comprises a signal collector, a signal processor, a wireless fetal electrocardiogram data transmission device, the smart phone with a client fetal electrocardiogram monitoring module, the smart phone with a doctor fetal electrocardiogram monitoring module and a power management module. The signal output end of the signal collector is connected with the input end of the signal processor, the output end of the signal processor is connected with the wireless fetal electrocardiogram data transmission device, and the power management module is connected with the signal collector, the signal processor and the wireless fetal electrocardiogram data transmission device respectively. According to the wearable fetal electrocardiogram monitoring system based on the smart phones, analog integrated front-end devices are used, therefore, the number of components is reduced obviously, the integration level is high, and power consumption is reduced obviously; the wearable fetal electrocardiogram monitoring system is light, cannot bring discomfort to pregnant women during wearing, and is suitable for long-range dynamic monitoring.
Description
Technical field
The present invention relates to a kind of fetal ECG Monitoring System and method, be specifically related to a kind of wearable fetal ECG Monitoring System and method based on smart mobile phone.
Background technology
Phenolics anemia of pregnant woman abdominal ecg record is the whether normal important indicator of reflection mother and fetus heart beat activity.The electrocardiogram that extracts fetus from anemia of pregnant woman's abdominal ecg is the important evidence of evaluating fetal in utero health status, as the conventional method of fetal monitoring, fetal heart monitoring is judging that whether fetus is poverty-stricken, is preventing and reduce on Perinatal mortality and morbidity and brought into play important function.
The clinical monitoring of embryo growth and development at present adopts the monitoring of doppler ultrasound fetal heart sound more, because sonac and the sensitive detection parts of doppler ultrasound fetal heart monitoring are heavier, anemia of pregnant woman wears, and when particularly movable, has discomfort, is unsuitable for long-range dynamic monitor.Often due to monitoring time and F/A Time Inconsistency, make monitoring result undesirable clinically, will inevitably cause larger psychological impact to anemia of pregnant woman if repeatedly monitoring result is undesirable.2MHz ultrasonic signal long duration of action, in anemia of pregnant woman's abdominal part, has certain influence to the healthy development of fetus in addition.Than doppler ultrasound, there is the features such as simple to operate, wearing is convenient by the collection of several light metal electrodes and signal and the mode of blood processor extraction abdominal part electrocardiosignal, as a kind of detection method of non-intrusion type, be applicable to, under daily life environment, Fetal ECG signal is carried out to long-range and monitor dynamically.And when fetal abnormality, it is more Zao, more responsive that the variation of fetal electrocardiogram occurs than hear sounds, aroused in interest etc.By the record to Fetal ECG waveform and analysis, in conjunction with clinical observation, can find in time the trimester of pregnancy such as fetal anoxia, cord entanglement or intrapartum pathologic condition, to take measures in time, guarantee foetus health safety.
Although extracting fetal electrocardiogram by electrode is that clinical embryo growth and development is guarded optimal method, but due to the impact of fetus environment of living in, Fetal ECG signal is submerged in a large amount of noise signals, wherein mainly comprise that mother's electrocardiosignal, power frequency are disturbed, mother's myoelectricity disturbs, respiratory movement is disturbed, as shown in Figure 1; The frequency range of Fetal ECG signal is distributed within the scope of 0.5Hz-100Hz, and it is very easily subject to, and 50Hz industrial frequency noise disturbs and the impact of DC shift.From the electrocardiosignal of anemia of pregnant woman's abdominal part record, both comprised Fetal ECG signal in addition, contain again mother's self electrocardiosignal, the amplitude of the QRS complex wave of mother's electrocardiosignal is approximately 100uV-150uV, and the amplitude peak of the QRS complex wave of Fetal ECG signal is only about 60uV, the Energy Estimation of the latter's signal is less than 1/4th of whole abdominal part electrocardiosignal ability.In addition, these two kinds of signals are overlapped in spectrum distribution, these two kinds of signals separated almost and cannot be realized with traditional Frequency Band Selection wave filter.And mother's muscle contraction, breathing, myoelectricity and body surface uterine electrical be all Fetal ECG detect important interference source, if be attended by uterine contraction, also can cause serious destruction to Fetal ECG signal.Due to the ununified standard in the storing position of electrode, the extraction of fetus signal also can be subject to the storing position of electrode, and the impact of pregnant week of the reality of fetus and fetus position in uterus.Just because of there has been the restriction of above-mentioned various constraintss, be a very difficult task for the extract real-time of Fetal ECG signal.
The fetal monitoring equipment of clinical use generally needs doctor or medical personnel's operation, and limited amount, cannot meet the demand to fetal monitoring under anemia of pregnant woman's daily life.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of wearable fetal ECG Monitoring System and method based on smart mobile phone, can detect reliably, safely Fetal ECG signal, and can be worn on it anemia of pregnant woman, easy to use, also can obtain the monitoring of remote doctor simultaneously.
The technical scheme that the present invention solves the problems of the technologies described above is as follows: a kind of wearable fetal ECG Monitoring System based on smart mobile phone, comprise signal picker, signal processor, Fetal ECG wireless data transmission device, with the smart mobile phone of user side Fetal ECG monitoring module, hold the smart mobile phone of Fetal ECG monitoring module with doctor, power management module, the signal output part of described signal picker is connected with the input of described signal processor, the outfan of described signal processor is connected with the input of described Fetal ECG wireless data transmission device, the outfan of described Fetal ECG wireless data transmission device is interconnected by wireless signal and described smart mobile phone with user side Fetal ECG monitoring module, the described smart mobile phone with user side Fetal ECG monitoring module is by mobile communications network and describedly hold the smart mobile phone of Fetal ECG monitoring module interconnected with doctor, described power management module respectively with described signal picker, signal processor, Fetal ECG wireless data transmission device is connected,
Described signal picker is integrated simulation front end device, and described signal picker is provided with four electrodes, and described signal picker is used for gathering anemia of pregnant woman's abdominal part electrocardiosignal, and anemia of pregnant woman's abdominal part electrocardiosignal is passed to signal processing module;
Described signal processor is processed and isolating fetal electrocardiosignal for the mixing electrocardiosignal of extracting from anemia of pregnant woman's abdominal part is carried out to digital filtering;
Described Fetal ECG data transmission device is for being sent to the smart mobile phone with user side Fetal ECG monitoring module through signal processing module anemia of pregnant woman's electrocardiosignal after treatment;
The described smart mobile phone with user side Fetal ECG monitoring module is used for receiving Fetal ECG signal data with wireless mode, and shows screen display Fetal ECG signal waveform at the smart mobile phone with user side Fetal ECG monitoring module;
Hold the smart mobile phone of Fetal ECG monitoring module for obtaining Fetal ECG signal by mobile communications network from described user's smart mobile phone with doctor;
Described power management module is for powering to signal picker, signal processor, Fetal ECG wireless data transmission device.
On the basis of technique scheme, the present invention can also do following improvement.
Further, described Fetal ECG wireless data transmission device is bluetooth wireless communications device.
Further, described blue tooth wireless communication device is bluetooth 4.0 device nRF8001.
Further, described signal picker is integrated brain electricity/ECG simulator front end device ADS1298.
Further, described signal processor is digital signal processor OMAP3530.
Further, the process that the mixing electrocardiosignal of extracting from anemia of pregnant woman's abdominal part is carried out digital filtering processing isolating fetal electrocardiosignal by described digital signal processor OMAP3530 is, be that 0.5Hz high pass filter is to mixing electrocardiosignal processing, to suppress baseline drift with cut-off frequency; Be that 100Hz low pass filter is further processed the signal suppressing after baseline drift with cut-off frequency, disturb to suppress myoelectricity; Adopt in the mixing electrocardiosignal of blind source separation method Cong San road after digital filtering and isolate Fetal ECG signal.
Further, be provided with display interface, exterior storage interface in described signal processor, described display interface is connected with external display, and described exterior storage interface is connected with outside SD card memory.
Further, described power management module is chargeable lithium cell.
The beneficial effect of a kind of wearable fetal ECG Monitoring System based on smart mobile phone of the present invention is: invent a kind of wearable fetal ECG Monitoring System based on smart mobile phone and adopt the integrated front end device of simulation, significantly reduce component number, integrated level is high, power consumption significantly reduces, this device is light, can not wear and bring sense of discomfort to anemia of pregnant woman, and applicable long-range is guarded dynamically, can guard Fetal ECG signal whenever and wherever possible, meet the demand to fetal monitoring under anemia of pregnant woman's daily life; Be provided with effective Digital Signal Processing simultaneously, adopt high-performance digital signal processor to process mixing electrocardiosignal, noise in signal and baseline drift are suppressed reliably, adopt blind source signal separation method, from mixed signal, automatically extract Fetal ECG signal.
Based on above-mentioned a kind of wearable fetal ECG Monitoring System based on smart mobile phone, the present invention also provides a kind of method of the wearable Fetal ECG monitoring based on smart mobile phone, and the method comprises the following steps:
S100, integrated brain electricity/ECG simulator front end device ADS1298 of signal acquisition module obtains anemia of pregnant woman's abdominal part electrocardiosignal;
S200, the mixing electrocardiosignal of extracting from anemia of pregnant woman's abdominal part is carried out digital filtering by the digital signal processor OMAP3530 of signal processing module to be processed and isolating fetal electrocardiosignal;
S300, is transferred to by bluetooth 4.0 device nRF8001 the Fetal ECG signal obtaining on the smart mobile phone with user side Fetal ECG monitoring module;
S400, the described smart mobile phone with user side Fetal ECG monitoring module, by mobile communications network, is sent to Fetal ECG signal with doctor and holds on the smart mobile phone of Fetal ECG monitoring module.
On the basis of technique scheme, the present invention can also do following improvement.
Further, in the time carrying out Fetal ECG monitoring, the wearable fetal ECG Monitoring System based on smart mobile phone is directly worn on it anemia of pregnant woman.
Further, when integrated brain electricity/ECG simulator front end device ADS1298 obtains anemia of pregnant woman's abdominal part electrocardiosignal, by the arrangement that assumes diamond in shape centered by anemia of pregnant woman's umbilicus of four electrodes of the amplifier in mouth of integrated brain electricity/ECG simulator front end device ADS1298, wherein an electrode of umbilicus below is reference electrode.
Further, described digital signal processor OMAP3530 by carrying out from the mixing electrocardiosignal of anemia of pregnant woman's abdominal part extraction, process and the method for isolating fetal electrocardiosignal is by digital filtering,
S201 is that 0.5Hz high pass filter is to mixing electrocardiosignal processing, to suppress baseline drift with cut-off frequency;
S202, is that 100Hz low pass filter is further processed the signal suppressing after baseline drift with cut-off frequency, disturbs to suppress myoelectricity;
S203, adopts in the mixing electrocardiosignal of blind source separation method Cong San road after digital filtering and isolates Fetal ECG signal.
Accompanying drawing explanation
Fig. 1 is anemia of pregnant woman's abdominal part electrocardiosignal schematic diagram;
Fig. 2 is the structured flowchart of a kind of wearable fetal ECG Monitoring System based on smart mobile phone of the present invention;
Fig. 3 extracts Fetal ECG signal flow graph automatically in a kind of wearable fetal ECG Monitoring System based on smart mobile phone of the present invention;
Fig. 4 is that a kind of wearable fetal ECG Monitoring System based on smart mobile phone of the present invention separates the Fetal ECG signal and mother's electrocardiosignal comparison diagram that obtain.
The specific embodiment
Below in conjunction with accompanying drawing, principle of the present invention and feature are described, example, only for explaining the present invention, is not intended to limit scope of the present invention.
As shown in Figure 2, a kind of wearable fetal ECG Monitoring System based on smart mobile phone, comprise signal picker, signal processor, Fetal ECG wireless data transmission device, with the smart mobile phone of user side Fetal ECG monitoring module, hold the smart mobile phone of Fetal ECG monitoring module with doctor, power management module, the signal output part of described signal picker is connected with the input of described signal processor, the outfan of described signal processor is connected with the input of described Fetal ECG wireless data transmission device, the outfan of described Fetal ECG wireless data transmission device is interconnected by wireless signal and described smart mobile phone with user side Fetal ECG monitoring module, the described smart mobile phone with user side Fetal ECG monitoring module is by mobile communications network and describedly hold the smart mobile phone of Fetal ECG monitoring module interconnected with doctor, described power management module respectively with described signal picker, signal processor, Fetal ECG wireless data transmission device is connected.Described signal picker is integrated simulation front end device, described signal picker is integrated brain electricity/ECG simulator front end device ADS1298, described signal picker is provided with four electrodes, described signal picker is used for gathering anemia of pregnant woman's abdominal part electrocardiosignal, and anemia of pregnant woman's abdominal part electrocardiosignal is passed to signal processing module.Described signal processor is digital signal processor OMAP3530, described signal processor is processed and isolating fetal electrocardiosignal for the mixing electrocardiosignal of extracting from anemia of pregnant woman's abdominal part is carried out to digital filtering, its process is, first be that 0.5Hz high pass filter is to mixing electrocardiosignal processing with cut-off frequency, to suppress baseline drift, then be that 100Hz low pass filter is further processed the signal suppressing after baseline drift with cut-off frequency, disturb to suppress myoelectricity, finally adopt in the mixing electrocardiosignal of blind source separation method Cong San road after digital filtering and isolate Fetal ECG signal, the flow process of its automatic extraction Fetal ECG signal as shown in Figure 3, the Fetal ECG signal that its separation obtains and mother's electrocardiosignal effect are as shown in Figure 4, in described signal processor, be also provided with display interface, exterior storage interface, described display interface is connected with external display, and described exterior storage interface is connected with outside SD card memory, can local storage and demonstration Fetal ECG signal.Described Fetal ECG wireless data transmission device is bluetooth wireless communications device, described blue tooth wireless communication device is low-power consumption bluetooth 4.0 device nRF8001, and described Fetal ECG data transmission device is for being sent to the smart mobile phone with user side Fetal ECG monitoring module through signal processing module anemia of pregnant woman's electrocardiosignal after treatment.The described smart mobile phone with user side Fetal ECG monitoring module is used for receiving Fetal ECG signal data with wireless mode, and shows screen display Fetal ECG signal waveform at the smart mobile phone with user side Fetal ECG monitoring module.The described smart mobile phone of Fetal ECG monitoring module of holding with doctor is for obtaining Fetal ECG signal by mobile communications network from described user's smart mobile phone, doctor can check the Fetal ECG signal waveform from user side, and long-range medical care and service can be provided.Described power management module is chargeable lithium cell, and described power management module is for powering to signal picker, signal processor, Fetal ECG wireless data transmission device, and described lithium battery adopts high-capacity lithium battery, to system power supply; Described lithium battery can use by recharge, and output voltage is 3.8V, and capacity is 2000mAh.
Based on above-mentioned a kind of based on above-mentioned a kind of wearable fetal ECG Monitoring System based on smart mobile phone, the present invention also provides a kind of method of the wearable Fetal ECG monitoring based on smart mobile phone, in the time carrying out Fetal ECG monitoring, the wearable fetal ECG Monitoring System based on smart mobile phone is directly worn on it anemia of pregnant woman.
First centered by the umbilicus of anemia of pregnant woman's abdominal part, an electrode is respectively laid in four positions up and down, four electrodes and umbilicus center are at a distance of 3～5 centimetres, the arrangement that assumes diamond in shape centered by anemia of pregnant woman's umbilicus of four electrodes, wherein umbilicus below is reference electrode, other three is signal electrode, obtains anemia of pregnant woman's abdominal part electrocardiosignal by integrated brain electricity/ECG simulator front end device ADS1298.
Then the mixing electrocardiosignal of extracting from anemia of pregnant woman's abdominal part is carried out digital filtering processing isolating fetal electrocardiosignal by digital signal processor OMAP3530; Wherein, the method that the mixing electrocardiosignal of extracting from anemia of pregnant woman's abdominal part is carried out digital filtering processing isolating fetal electrocardiosignal by described digital signal processor OMAP3530 is: first, be that 0.5Hz high pass filter is to mixing electrocardiosignal processing, to suppress baseline drift with cut-off frequency; Then, be that 100Hz low pass filter is further processed the signal suppressing after baseline drift with cut-off frequency, disturb to suppress myoelectricity; Finally, adopt in the mixing electrocardiosignal of blind source separation method Cong San road after digital filtering and isolate Fetal ECG signal.
Secondly, the Fetal ECG signal obtaining is transferred on the smart mobile phone with user side Fetal ECG monitoring module by bluetooth 4.0 device nRF8001; Its process is the blue tooth interface of opening with the smart mobile phone of user side Fetal ECG monitoring module, set up and be connected with the pairing of described Bluetooth wireless communication module, the described smart mobile phone with user side Fetal ECG monitoring module receives Fetal ECG signal data with wireless mode, and on mobile phone display screen, shows Fetal ECG signal waveform.
Finally, smart mobile phone with user side Fetal ECG monitoring module passes through mobile communications network, Fetal ECG signal is sent to doctor and is held on the smart mobile phone of Fetal ECG monitoring module, doctor can check the Fetal ECG signal waveform from user side, and long-range medical care and service can be provided.
The foregoing is only preferred embodiment of the present invention, in order to limit the present invention, within the spirit and principles in the present invention not all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (12)
1. the wearable fetal ECG Monitoring System based on smart mobile phone, it is characterized in that: comprise signal picker, signal processor, Fetal ECG wireless data transmission device, with the smart mobile phone of user side Fetal ECG monitoring module, hold the smart mobile phone of Fetal ECG monitoring module with doctor, power management module, the signal output part of described signal picker is connected with the input of described signal processor, the outfan of described signal processor is connected with the input of described Fetal ECG wireless data transmission device, the outfan of described Fetal ECG wireless data transmission device is interconnected by wireless signal and described smart mobile phone with user side Fetal ECG monitoring module, the described smart mobile phone with user side Fetal ECG monitoring module is by mobile communications network and describedly hold the smart mobile phone of Fetal ECG monitoring module interconnected with doctor, described power management module respectively with described signal picker, signal processor, Fetal ECG wireless data transmission device is connected,
Described signal picker is integrated simulation front end device, and described signal picker is provided with four electrodes, and described signal picker is used for gathering anemia of pregnant woman's abdominal part electrocardiosignal, and anemia of pregnant woman's abdominal part electrocardiosignal is passed to signal processing module;
Described signal processor is processed and isolating fetal electrocardiosignal for the mixing electrocardiosignal of extracting from anemia of pregnant woman's abdominal part is carried out to digital filtering;
Described Fetal ECG data transmission device is for being sent to the smart mobile phone with user side Fetal ECG monitoring module through signal processing module anemia of pregnant woman's electrocardiosignal after treatment;
The described smart mobile phone with user side Fetal ECG monitoring module is used for receiving Fetal ECG signal data with wireless mode, and shows Fetal ECG signal waveform;
Hold the smart mobile phone of Fetal ECG monitoring module for obtaining Fetal ECG signal by mobile communications network from the described smart mobile phone with user side Fetal ECG monitoring module with doctor;
Described power management module is for powering to signal picker, signal processor, Fetal ECG wireless data transmission device.
2. a kind of wearable fetal ECG Monitoring System based on smart mobile phone according to claim 1, is characterized in that: described Fetal ECG wireless data transmission device is bluetooth wireless communications device.
3. a kind of wearable fetal ECG Monitoring System based on smart mobile phone according to claim 2, is characterized in that: described blue tooth wireless communication device is bluetooth 4.0 device nRF8001.
4. according to a kind of wearable fetal ECG Monitoring System based on smart mobile phone described in claims 1 to 3 any one, it is characterized in that: described signal picker is integrated brain electricity/ECG simulator front end device ADS1298.
5. according to a kind of wearable fetal ECG Monitoring System based on smart mobile phone described in claims 1 to 3 any one, it is characterized in that: described signal processor is digital signal processor OMAP3530.
6. a kind of wearable fetal ECG Monitoring System based on smart mobile phone according to claim 5, it is characterized in that: the process that the mixing electrocardiosignal of extracting from anemia of pregnant woman's abdominal part is carried out digital filtering processing isolating fetal electrocardiosignal by described digital signal processor OMAP3530 is, be that 0.5Hz high pass filter is to mixing electrocardiosignal processing, to suppress baseline drift with cut-off frequency; Be that 100Hz low pass filter is further processed the signal suppressing after baseline drift with cut-off frequency, disturb to suppress myoelectricity; Adopt in the mixing electrocardiosignal of blind source separation method Cong San road after digital filtering and isolate Fetal ECG signal.
7. according to a kind of wearable fetal ECG Monitoring System based on smart mobile phone described in claims 1 to 3 any one, it is characterized in that: in described signal processor, be provided with display interface, exterior storage interface, described display interface is connected with external display, and described exterior storage interface is connected with outside SD card memory.
8. according to a kind of wearable fetal ECG Monitoring System based on smart mobile phone described in claims 1 to 3 any one, it is characterized in that: described power management module is chargeable lithium cell.
9. the wearable Fetal ECG monitoring method based on smart mobile phone, is characterized in that: comprises the following steps,
S100, integrated brain electricity/ECG simulator front end device ADS1298 of signal acquisition module obtains anemia of pregnant woman's abdominal part electrocardiosignal;
S200, the mixing electrocardiosignal of extracting from anemia of pregnant woman's abdominal part is carried out digital filtering by the digital signal processor OMAP3530 of signal processing module to be processed and isolating fetal electrocardiosignal;
S300, is transferred to by bluetooth 4.0 device nRF8001 the Fetal ECG signal obtaining on the smart mobile phone with user side Fetal ECG monitoring module;
S400, the described smart mobile phone with user side Fetal ECG monitoring module, by mobile communications network, is sent to Fetal ECG signal with doctor and holds on the smart mobile phone of Fetal ECG monitoring module.
10. a kind of wearable Fetal ECG monitoring method based on smart mobile phone according to claim 9, is characterized in that: in the time carrying out Fetal ECG monitoring, the wearable fetal ECG Monitoring System based on smart mobile phone is directly worn on it anemia of pregnant woman.
11. according to a kind of wearable Fetal ECG monitoring method based on smart mobile phone described in claim 9 or 10, it is characterized in that: when integrated brain electricity/ECG simulator front end device ADS1298 obtains anemia of pregnant woman's abdominal part electrocardiosignal, by the arrangement that assumes diamond in shape centered by anemia of pregnant woman's umbilicus of four electrodes of the amplifier in mouth of integrated brain electricity/ECG simulator front end device ADS1298, wherein an electrode of umbilicus below is reference electrode.
12. according to a kind of wearable Fetal ECG monitoring method based on smart mobile phone described in claim 9 or 10, it is characterized in that: the method that the mixing electrocardiosignal of extracting from anemia of pregnant woman's abdominal part is carried out digital filtering processing isolating fetal electrocardiosignal by described digital signal processor OMAP3530 is
S201 is that 0.5Hz high pass filter is to mixing electrocardiosignal processing, to suppress baseline drift with cut-off frequency;
S202, is that 100Hz low pass filter is further processed the signal suppressing after baseline drift with cut-off frequency, disturbs to suppress myoelectricity;
S203, adopts in the mixing electrocardiosignal of blind source separation method Cong San road after digital filtering and isolates Fetal ECG signal.
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| CN110090013A (en) * | 2019-04-30 | 2019-08-06 | 潍坊医学院 | Ecg signal acquiring method and Acquisition Circuit based on navel reference electrode |
| CN110090013B (en) * | 2019-04-30 | 2023-11-14 | 潍坊医学院 | Electrocardiosignal acquisition method and acquisition circuit based on navel reference electrode |
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