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105 results about "Fetal heart sounds" patented technology
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A sound produced by the heart of a fetus, as detected by auscultation or by electronic fetal monitoring. The heart begins beating at about 14 days of intrauterine life.
Electronic stethoscope
The invention provides an electronic stethoscope. The electronic stethoscope comprises a stethoscope head for being contacted with the body surface during auscultation so that acoustic signals sent by organs and radiated by the body surface generate resonance and the resonance acoustic signals are converted into electric signals, a host machine for amplifying and filtering the electric signals converted by the stethoscope head and converting the electric signals processed into acoustic signals, and a loudspeaker for playing the acoustic signals converted by the host machine. The electronic stethoscope provided by the invention can monitor and record sounds at various frequencies sent by various organs such as heart sounds, bowelsounds, lung sounds, and fetal heart sounds, is suitable for diagnosing various diseases, and is simple in structure and using method, and can effectively isolate external noises so as to improve the diagnosing accuracy.
Owner:RONGHAI SUPERSONIC MEDICINE EN
Fetal heart sound monitoring instrument based on piezoelectric thin-film sensor
The invention discloses a fetal heart sound monitoring instrument comprising a piezoelectric thin-film sensor, a control circuit and a display component, wherein the control circuit and the piezoelectric thin-film sensor are electrically connected by a conducting wire. According to the fetal heart sound monitoring instrument, the mechanical vibration of the skin of the abdomen of a pregnant woman, which is caused by the palpitation movement of a fetus in the abdomen of the pregnant woman, is sensed by adopting the piezoelectric thin-film sensor and is also converted into a corresponding charge signal, the treatment of amplification, filtration, analog-to-digital conversion, separation and the like is carried out on the charge signal by the control circuit, and finally, a corresponding monitoring result is obtained by output. The fetal heart sound monitoring instrument disclosed by the invention has the advantages of signal monitoring sensitivity, accuracy and good linearity, easy production and manufacture and the like. The fetal heart sound monitoring instrument has more advantages that the fetal heart sound monitoring instrument disclosed by the invention is convenient to use and does not have any injuring action to a mother and a child, so that the fetal heart sound monitoring instrument can be used as a medical auxiliary instrument which is between a fetal heart stethoscope and an ultrasonic Doppler fetal heart sound detecting instrument and is used for clinical diagnosis and the self checking of the pregnant woman.
Owner:PEKING UNIV SHENZHEN GRADUATE SCHOOL
Instant heart rate detection method and device for Doppler fetal heart sound based on time-frequency analysis
The invention relates to the technical field of medical monitoring, and discloses an instant heart rate detection method and device for Doppler fetal heart sound based on time-frequency analysis. The detection method comprises the following steps: preprocessing the Doppler fetal heart sound through a band-pass filter; performing time-sequence analysis on the preprocessed ultrasonic Doppler fetal heart sound, and acquiring a time-sequence graph of the ultrasonic Doppler fetal heart sound by adopting an STFT (Short Time Fourier Transform) to realize convenient and rapid calculation; acquiring the instant heart rate of the fetal heart sound with a cross-correlation method: selecting a feature frequency band according to the time-frequency graph of Doppler fetal heart sound, selecting a feature template according to prior knowledge of a fetal sound signal, evaluating a cross-correlation function of the feature frequency band and the feature template, drawing a cross-correlation curve, and calculating the instant heart rate of the ultrasonic Doppler fetal heart sound signal by calculating the interval of the crest value of the cross-correlation curve. The method can be applied to calculation of the instant heart rate of a clinically-acquired ultrasonic Doppler fetal heart sound signal, and has the advantages of easiness, high calculation speed and high accuracy.
Owner:GUANGDONG UNIV OF TECH
Single-channel fetal electrocardiogram blind separation device based on oblique projection and separation method
The invention relates to a single-channel fetal electrocardiogram blind separation device based on oblique projection and a separation method. The separation device comprises a single-channel electrocardiogram signal acquisition module, a Doppler fetal heart sound acquisition module, an analog to digital conversion module, a microprocessor and a PC (personal computer) upper computer for separating and displaying signals. A switch-in end of the single-channel electrocardiogram signal acquisition module for acquiring aliasing electrocardiogram signals is connected with an electrocardiogram lead cable, an input end of the Doppler fetal heart sound acquisition module for acquiring fetal heart sound signals is connected with an ultrasonic probe, a switch-out end of the single-channel electrocardiogram signal acquisition module and a switch-out end of the Doppler fetal heart sound acquisition module are respectively connected with an analog input end of the analog to digital conversion module, a data output port of the analog to digital conversion module is connected with the microprocessor, and the microprocessor is connected with the PC upper computer. The separation method includes a fetal electrocardiogram QRS (quantum resonance spectrometer) wave group positioning method based on oblique projection and single-channel fetal electrocardiogram signal blind separation based on oblique projection. The separation device is reasonable in design and is convenient and practical; and the separation method is convenient and practical.
Owner:GUANGDONG UNIV OF TECH
Array fetal heart monitoring abdominal bandage based on piezoelectric film sensor
ActiveCN103222863AQuick responseHigh sensitivityDiagnostic recording/measuringSensorsSensor arrayDigital signal processing
The invention provides an array fetal heart monitoring abdominal bandage based on a piezoelectric film sensor and relates to the field of monitoring on the heart of a fetus. The invention is used for solving the problems of serious error, 'invasion type' monitoring manner and low accuracy caused in the fact that a fetal heart sound stethoscope, an ultrasonic Doppler fetal heart sound instrument and a single sensor are used for fetal heart monitoring in the prior art. Magic pastes are respectively arranged at the two end parts of the abdominal bandage, and a piezoelectric film sensor array is arranged at the middle part of the abdominal bandage; a detection circuit is arranged on the abdominal bandage; and the detection circuit is composed of a preposed differential amplifying circuit, a filter circuit, an analog / digital conversion circuit, a DSP (digital signal processing) module, a storage module and an interface module. The adopted piezoelectric film sensor has the advantages of high response speed, high flexibility and good linearity, and high detection accuracy can be guaranteed; and the piezoelectric film sensor is light, soft and durable, so that the piezoelectric film sensor can be in fit with a human body well after being embedded into the abdominal bandage and a man-machine effect is good.
Owner:HARBIN INST OF TECH
Method and device for acquiring fetal heart sound signal envelope
ActiveCN103393435AHighlight periodicityImprove signal to noise ratioAuscultation instrumentsMeasuring/recording heart/pulse rateSignal-to-noise ratio (imaging)Obstetrics
The invention relates to a method for acquiring fetal heart sound signal envelope. The method comprises the following steps that a fetal heart sound signal is collected, and intervention processing is conducted on the signal; a template signal is acquired, matching filtering is conducted on the fetal heart sound signal after preprocessing by utilizing the template signal, so that a signal-to-noise-ratio wave shape is acquired; non-linear peak enhancement is conducted on the fetal heart sound signal after matching filtering according to slope variation of the signal within two adjacent moments, and the envelope of the fetal heart sound signal after the matching filtering is further acquired. The invention further relates to a device for achieving the method. The method and device for acquiring the fetal heart sound signal envelope has the following advantages of being strong in anti-interference capacity and capable of enabling periodicity of the signal to be more obvious, so that calculation of the following fetal heart rate is facilitated.
Owner:EDAN INSTR
Nonnegative blind source separation fetal heart sound analysis method and device
ActiveCN105787946AAccurate segmentationEasy to analyze and studyImage enhancementImage analysisFrequency spectrumObstetrics
The invention provides a nonnegative blind source separation fetal heart sound analysis method and device. The method comprises the following steps: 1) collecting fetal heart sound signals; 2) carrying out pretreatment on the collected fetal heart sound signals, and adopting wavelet transform, which not only can effectively remove noise, but also can keep local singularity of the signals, in the pretreatment process; 3) converting the signals obtained after pretreatment to a time-frequency domain to obtain nonnegative frequency spectrum, the adopted method being: carrying out wigner-ville distribution calculating on the signals obtained after pretreatment and carrying out modulus calculating to obtain magnitude spectrum; 4) carrying out blind source separation by utilizing non-negative matrix factorization and carrying out processing on the fetal heart sound signal amplitude spectrum to obtain nonnegative time-frequency component of the fetal heart sound signal; 5) drawing an envelope curve; and 6) analyzing the envelope, setting dual thresholds to realize envelope segmentation and calculating instantaneous heart rate. The analysis method and device are good in flexibility, can segment the fetal heart sound signal accurately, and are high in instantaneous heart rate identification accuracy.
Owner:GUANGDONG UNIV OF TECH
Radiationless maternal and child health supervision platform based on Internet of Things
ActiveCN103142311AHigh sensitivityMeet different needsStethoscopeSurgeryMaternal and child healthTablet computer
The invention discloses a radiationless maternal and child health supervision platform based on Internet of Things and belongs to a maternal and child health supervision system. The supervision platform at least comprises a sensor perception module, a signal conditioning module, a control module, a terminal module and a cloud platform module, wherein the cloud platform module is connected with the terminal module by a network; the terminal module uploads fetal heart sound digital signals, fetal movement digital signals and evaluation results generated by the terminal module to the cloud platform module; as the fetal heart sound signals and the fetal movement signals are collected passively for analysis and judgment, no ultrasonic radiation is caused during use, no harm is brought to a fetus, and the platform is applicable to frequent and repeatable examination and family use; the cloud platform can share resources of different individuals, data statistics and various information feedback, so that a user can obtain the evaluation of a health status of the fetus without going out; and the platform can be constructed depending on the existing tablet computer or smart mobile phone, and is low in use cost and wide in application scope.
Owner:CYNOWARE ELECTRONICS
Fetal monitoring method and fetal monitoring device
InactiveCN106137168AEasy for safe monitoringSolving Mobility IssuesStethoscopeSensorsAbdomen skinObstetrics
The embodiment of the invention discloses a fetal monitoring method and a fetal monitoring device, and relates to the technology of electronic medical appliances. The device is convenient for monitoring safety of fetal heart and fetal movement of a fetus. The fetal heart rate monitoring method comprises the following steps: sensing pressure change information caused after a longitudinal wave is transmitted to the sensitive surface of a micro-pressure sensor, wherein the longitudinal wave is generated by the surrounding air pushed by vibration energy of micro-vibration on the maternal abdomen skin surface after a fetal heart sound generated by the fetus is transmitted through amniotic fluid, uterine wall and the maternal abdomen skin; performing amplification, filtration, digital-analog conversion and signal peak value extraction treatments on the pressure change information to obtain the fetal heart rate information; and transmitting the acquired fetal heart rate information to preset electronic equipment. The fetal movement monitoring method comprises the steps of monitoring the vibration of maternal skin by an acceleration sensor, and discriminating fetal movement by operation. The fetal monitoring method and fetal monitoring device are suitable for mobile safety monitoring the fetus.
Owner:EXTANT FUTURE (BEIJING) INFORMATION & TECH CO LTD
Fetal heart monitoring equipment
ActiveCN103705270AImprove securityImprove portabilityStethoscopeDiagnostic recording/measuringObstetricsMedicine
The invention provides fetal heart monitoring equipment. The fetal heart monitoring equipment is characterized by comprising a sensing node and a personal gateway, the sensing node does not actively emit ultrasonic waves to a fetus but passively collect sounds or vibration on the surface of the abdomen of a pregnant woman to acquire fetal heart signals, and sends the fetal heart signals to the personal gateway in a wireless manner, and the personal gateway is used for processing the fetal heart signals sent by the sensing node to acquire a fetal heart rate. By the fetal heart monitoring equipment, the pregnant woman can wirelessly monitor health status of the fetus at home by herself for a long time, and using passive-type fetal heart sound monitoring does not pose a threat to health of the fetus; and the fetal heart monitoring equipment is especially suitable for monitoring of high-risk pregnant women.
Owner:TSINGHUA UNIV
Monitoring method capable of replaying fetal-heart Doppler audio signals
ActiveCN102772226AAccurate judgmentReduce jumping misjudgmentsHeart/pulse rate measurement devicesEmergency medicineFetus fetus
The invention relates to the technical field of medical monitoring, and specifically relates to a monitoring method and device capable of replaying fetal-heart Doppler audio signals. The method disclosed by the invention comprises the following steps of: acquiring and storing fetal-heart monitoring signals; comparing the acquired fetal-heart monitoring signals with a judgment standard, and if the comparison result is abnormal, adding an abnormal mark in the result; when a user needs to replay the fetal-heart monitoring signals, replaying the fetal-heart monitoring signals; and carrying out judgment on the abnormal state of the fetal-heart monitoring signals by the user according to the replayed fetal-heart monitoring signals, and carrying out redefinition on the mark according to the judgment result. According to the technical scheme provided by the invention, even if doctors are not beside a fetal monitor, the doctors also can replay an audio through an audio recording module to hear fetal heart sound in follow-up time in case that the fetal heart of a fetus is subjected to a complicated heartbeat situation, and then judges whether heart rate miscalculation or real fetal-heart mutation occurs according to the beat of the audio, so that the possibility of misjudgment on fetal-heart beats is greatly reduced, and the diagnosis of the doctors is facilitated.
Owner:EDAN INSTR
Fetal heart sound denoising method
InactiveCN105232023AQuality improvementReduce noiseMeasuring/recording heart/pulse ratePregnancyObstetrics
The invention discloses a fetal heart sound denoising method. The fetal heart sound denoising method includes segmenting a collected fetal heart sound signal, selecting a collected segment with good quality as reference, performing empirical mode decomposition to decompose the signal into a plurality of IMF components, performing discrete wavelet transform on the prior two IMF components, and performing ICA (independent component analysis) estimation on the transformed signal to obtain two independent wavelets; combining the two independent wavelets with each segment of the fetal heart sound signal, separating the mixed signal according to an ICA method, extracting a signal with small noise, and naming the signal as a pure signal; further analyzing the extracted pure fetal heart sound signal to obtain the denoised fetal heart sound signal. By the fetal heart sound denoising method, accurate, quick and high-quality fetal heart sound signals can be provided for fetal detecting and monitoring in pregnancy period.
Owner:SICHUAN CHANGHONG ELECTRIC CO LTD
Heart sound, lung sound and fetal heart sound acquisition and health management system and method
The invention discloses a heart sound, lung sound and fetal heart sound acquisition and health management system, which comprises an acquisition terminal, a transmission system, a platform processing system and a storage and display system, wherein the acquisition terminal is used for acquiring the heart sound or lung sound or fetal heart sound condition of a human body, and converting the heart sound or lung sound or fetal heart sound condition into an electric signal; the acquisition terminal is in communication connection with the transmission system through a wired network or a wireless network, and the transmission system is a mobile phone; the transmission system is in communication connection with the platform processing system through the wireless network, and the platform processing system is a health management service cloud platform; the storage and display system is a mobile phone, and is in communication connection with the platform processing system through the wireless network. According to the system, the heart sound, the lung sound and the fetal heart sound of the human body are acquired by the acquisition terminal or a microphone, are transmitted to the mobile phone after being subjected to processing such as data conversion and amplification filtration, and are transmitted to the health management service cloud platform through the mobile phone, and a health management report of the human body is obtained for the timely query of the human body through the mobile phone.
Owner:SICHUAN CHANGHONG ELECTRIC CO LTD
Intelligent fetal heart sound monitoring instrument and monitoring method
InactiveCN105708498AImprove signal-to-noise ratioImprove accuracyOrgan movement/changes detectionInfrasonic diagnosticsObstetricsSignal on
The invention discloses an intelligent fetal heart sound monitor, which belongs to the fetal heart sound monitoring technology, and comprises a conical shell with openings at both ends; a cover body sealingly connected with the smaller opening end of the shell; sensor; and a differential system; the sound sensor includes a first collection end face and a second collection end face, the first collection end face is set in contact with the inner wall of the housing, and the differential system is configured to collect the first collection end face and the second collection end face The fetal heart sound signal is differentially processed. In the present invention, the first collection end face and the second collection end face for collecting fetal heart sound signals are reversely arranged on the sound sensor, so that the interference sound signals collected by the first collection end face and the second collection end face are equivalent, while the first The fetal heart sound signal collected by the acquisition end surface is much larger than the fetal heart sound signal collected by the second acquisition end surface, and then through the differential processing of the differential system, the fetal heart sound signal with a higher signal-to-noise ratio is obtained, which improves the fetal heart sound signal acquisition. accuracy.
Owner:黄华
Fetal heart sound signal detection and processing device
InactiveCN105078435AReduce mistakesRealize monitoringMeasuring/recording heart/pulse rateSpecial data processing applicationsObstetricsPulse rate
The invention provides a fetal heart sound signal detection and processing device. The fetal heart sound signal detection and processing device comprises a signal detection unit and a signal processing unit. The signal detection unit is used for collecting fetal heart sound acoustic signals and converting the fetal heart sound acoustic signals into fetal heart sound electric signals. The signal processing unit comprises a processing subunit, a feature identification subunit and a calculation subunit. The processing subunit is used for carrying out denoising processing on the fetal heart sound electric signals and extracting signal envelopes of the fetal heart sound electric signals undergoing denoising processing. The feature identification subunit is used for identifying positions of first heart sound waveforms and positions of second heart sound waveforms in the signal envelops. The calculation subunit is used for calculating duration between starting points or finishing points of every two adjacent first heart sound waveforms and of every two adjacent second heart sound waveforms, so that multiple heart rate values based on first heart sounds and multiple heart rate values based on second heart sounds are obtained, and the heart rate values are averaged so that the fetal heart rate can be obtained. According to the fetal heart sound signal detection and processing device, fetuses cannot be influenced when fetal heart sound signals are collected, and the collected fetal heart sound signals can be well processed.
Owner:RONGHAI SUPERSONIC MEDICINE EN
Pregnancy and birth real-time monitoring device and method
ActiveCN110897631ASimple calculationMonitor fetal movement intensityStethoscopeEvaluation of blood vesselsObstetricsControl cell
The invention provides a pregnancy and birth real-time monitoring device and a pregnancy and birth real-time monitoring method. The pregnancy and birth real-time monitoring device comprises a fetus information acquisition unit, a three-axis acceleration sensor attached to the back and waist of a mother body, a signal processing unit and a control unit, wherein the fetal information acquisition unit comprises an electrocardio reference electrode attached to the back and waist of the mother body and an electrocardio electrode array attached to the abdomen of the mother body; and / or the fetal information acquisition unit comprises a sound sensor which is attached to the central position of the abdomen of the mother body and is used for acquiring fetal heart sound signals; the output ends of fetal electrocardiogram electrodes, the sound sensor and the three-axis acceleration sensor are connected to the signal processing unit, and the output end of the signal processing unit is connected with the control unit. The pregnancy and birth real-time monitoring device adopts multiple types of sensors to monitor the fetus in real time, can objectively and accurately monitor the fetal movement intensity, the fetal movement frequency, the fetal movement type, the fetal heartbeat intensity and the like, and can harmlessly monitor the fetal movement intensity, the fetal movement frequency, thefetal movement type, the fetal heartbeat intensity and the like for a long time in real time at home or in hospitals.
Owner:CHONGQING MEDICAL UNIVERSITY
Dual-microphone noise reduction method and device for medical acoustic signals
InactiveCN104581516AEfficient separationMouthpiece/microphone attachmentsTransducer circuitsEnvironmental noiseFrequency Unit
The invention discloses a dual-microphone noise reduction method and device applied to medical acoustic signals such as heart and lung sounds, fetal heart sounds and the like. The dual-microphone noise reduction method for the medical acoustic signals comprises steps as follows: acquiring medical acoustic signal data with noises and ambient noise data, and processing the medical acoustic signal data and the ambient noise data respectively to obtain a time-frequency unit; calculating a characteristic value for the time-frequency unit; generating a masking value according to the relation between the characteristic value and a masking threshold, and marking a part, which mainly comprises the medical acoustic signals, of the time-frequency unit; masking the time-frequency unit of the medical acoustic signal data with the noises according to the generated masking value, reserving the part which mainly comprises the medical acoustic signals, and reconstructing the masked data to obtain a noise reduction result. According to the noise reduction method, the medical acoustic signals with the noises and ambient noises are acquired respectively by the aid of dual microphones, and the medical acoustic signals and the ambient noises are effectively separated.
Owner:BEIJING YIMAI MEDICAL TECH CO LTD
Teaching model for abdominal examination skill training during pregnancy
InactiveCN104700699APlay various soundsImage of teaching processEducational modelsObstetricsWhole body
The invention discloses a teaching model for abdominal examination skill training during pregnancy. The teaching model comprises a pregnancy abdomen phantom, wherein the pregnancy abdomen phantom can be fixed to the abdomen of a whole female body mode, a uterus phantom and a pelvis inlet phantom are arranged in the pregnancy abdomen phantom, a fetus phantom is arranged in the uterus phantom, and liquid is filled between the fetus phantom and the inner wall of the uterus phantom. A first microphone is arranged on the fetus phantom and used for playing fetal heart sound and umbilical cord sound, a second microphone is arranged on the uterus phantom and used for playing uterine souffle, placental souffle and aorta abdominalis souffle, and the first microphone and the second microphone are in signal connection with a player. A vibration device for simulating fetal movement is arranged on the fetus phantom and is in signal connection with the controller. The teaching model for abdominal examination skill training during pregnancy has the advantages of being simple in structure, good in simulation performance and good in teaching effect.
Owner:李信本
Method for extracting Doppler fetal heart sound signals on basis of delay estimation
ActiveCN104274211AImprove efficiencyImprove accuracyHeart/pulse rate measurement devicesInfrasonic diagnosticsObstetricsSignal on
The invention discloses a method for extracting Doppler fetal heart sound signals on the basis of delay estimation. The method includes steps of acquiring abdominal ultrasonic Doppler echo signals of mothers; respectively acquiring delay estimation prior information of the Doppler fetal heart sound signals, uterus noise signals of the mothers and abdominal aorta sound signals of the mothers; performing k-level signal differential operation on the prior information; performing linear irrelevancy processing on the prior information; solving optimization problems to obtain weight vectors; respectively creating Vandermonde equation sets, solving the Vandermonde equation sets and determining delay of the various signals; acquiring delay of interference signals of the mothers; extracting Doppler fetal heart sound signals from the acquired signals by the aid of a single-channel blind separation process on the basis of oblique projection to acquire the pure Doppler fetal heart sound signals. The k is a positive integer. The method has the advantages that the method is applicable to extracting the Doppler fetal heart sound signals during fetal health condition examination, and the interference signals of the mothers can be effectively separated from the signals.
Owner:GUANGDONG UNIV OF TECH
Method for synchronously storing and playing back fetal heart sound, heartbeat waveform and heart rate values
ActiveCN101889875ASynchronous displaySynchronous playbackHeart/pulse rate measurement devicesMicrocontrollerAudio power amplifier
The invention relates to a method for synchronously storing and playing back fetal heart sound, heartbeat waveform and heart rate values. The storing method comprises the following steps of: acquiring fetal heart signals; dividing the signals into three paths, performing AD sampling on the first path to obtain heart sound signals, connecting the second path and an amplifier and then connecting a power amplification circuit, connecting the third path and an amplifying circuit and then dividing the third path into two paths, performing AD sampling on the first path of the third path to obtain heartbeat wave and a bar chart, and capturing, calculating and filtering the other path of the third path by a singlechip to obtain heart rate values after the other path of the third path is shaped by a comparator; and packing and storing the heart sound digital signals, the heartbeat waveform and the heart rate values as a fetal heart sound file. The playback method comprises the following steps of: reading the fetal heart sound file, extracting the heart rate value and heartbeat waveform data after unpacking, drawing the heartbeat waveform and the bar chart according to the waveform data, extracting the heart sound data at the same time and playing back the heart sound data after DA processing. The method can realize synchronous display, storage and playback of the fetal heart sound, the fetal heart rate, the heartbeat waveform and the bar chart, has more intuitive and clearer display, and can control the play of antenatal training music.
Owner:CONTEC MEDICAL SYST
Conformal fetal heart monitoring sensor and work method thereof
InactiveCN104905819AFit tightlyComfortable monitoringHeart/pulse rate measurement devicesInfrasonic diagnosticsObstetricsUltrasonic sensor
The invention provides a conformal fetal heart monitoring sensor. The conformal fetal heart monitoring sensor is characterized by comprising a curved outer shell and ultrasonic transducers, the radius of curvature of the inner surface of the curved outer shell ranges from 15 cm to 40 cm, and the area of the inner surface of the curved outer shell is not smaller than 35 cm<2>. The invention further provides a work method of the conformal fetal heart monitoring sensor. The work method is characterized by comprising the following steps of dividing the ultrasonic transducers into multiple sets, sequentially operating each ultrasonic transducer set, analyzing the monitored fetal heart sound signal intensity when each ultrasonic transducer set operates, and selecting the ultrasonic transducer set with the strongest monitored fetal heart sound signal to work. By means of the conformal fetal heart monitoring sensor and the work method thereof, the shape of the inner surface is similar to the shape of the abdomen of a puerpera, the sensor better fits the abdomen, and monitoring is more comfortable; the area of the inner surface is larger, the coverage area of an ultrasonic field is large, and the fetal heart monitoring performance is not reduced and the ultrasonic launching dosage is not increased while the monitoring comfort is improved and the coverage area of the ultrasonic field is increased.
Owner:GUANGZHOU SUNRAY MEDICAL APP
Method and device for determining fetal heart sounds by passive sensing and system for examining fetal heart function
ActiveCN106793996AHeart/pulse rate measurement devicesAuscultation instrumentsAudio power amplifierFuzzy rule
In the method according to the invention a phonocardiographic signal, obtained by a passive acoustic sensor (10) from a maternal abdominal wall, is pre-filtered, amplified, digitized, digitally filtered by means of a programmable amplifier and filter unit (20), is stored in an intermediate memory and autocorrelation is performed by means of an autocorrelation unit (30) in a time window of a predetermined size. The signals obtained as a result of autocorrelation are fed to an input of a fuzzy expert system (40), wherein local maximums of the signals, temporal location of the local maximums and variation of the temporal location of the local maximums are determined by the fuzzy expert system (40), and, applying those as input parameters or signals of the fuzzy expert system, those are classified into probability groups utilizing a fuzzy rule set of a decision logic stored in a knowledge base and biologically expected data and are evaluated.
Owner:JIANGSU SHINSSON HEALTH TECH CO LTD
Fetal heart sound separating method
The invention discloses a fetal heart sound separating method. The fetal heart sound separating method comprises the following steps of A, performing phase-space reconstruction on fetal heart sound signals X and expanding one-dimensional signals of the fetal heart sound signals X into m-dimensional signals; B, analyzing independent elements of the expanded m-dimensional row vector; C, selecting the independent element with the maximum contribution rate in the fetal heart sound signals X in a frequency range of 60-180 Hz, wherein the independent element is a fetal heart sound signal xi; D, performing mapping returning phase-space reconstruction on the fetal heart sound signal xi of the selected independent element to obtain a pure fetal heart sound signal x ^; and E, performing further treatment, which comprises fetal heart rate computing, on the obtained fetal heart sound signal x ^. Through a phase-space reconstruction technology and a blind signal treatment technology, fetal heart sound signals are extracted, extracting and treating of heart sound of a fetal in the womb of a pregnant woman are finished, relatively pure fetal sound signals are obtained, and a new way is provided for detecting and monitoring the fetal in a pregnancy period of a woman.
Owner:SICHUAN CHANGHONG ELECTRIC CO LTD
Fetal heart sound processing method and device, and fetal heart sound detection equipment
ActiveCN108451548AReduce distractionsThe fetal heart beat is clearly discernibleOrgan movement/changes detectionInfrasonic diagnosticsObstetricsSonification
According to the embodiment, the invention discloses a fetal heart sound processing method, in order to solve a problem of existing fetal heart sound detection equipment which is difficult in effectively filtering off floor noise of fetal heart sound. According to the embodiment, the method comprises the following steps: acquiring ultrasonic echo signals which are collected when fetal heart soundis detected; processing the ultrasonic echo signals, so that fetal heart sound frequency digital signals are obtained; implementing de-noising treatment on the fetal heart sound frequency digital signals in accordance with a preset de-noising coefficient, so that fetal heart sound frequency signals that floor noise is filtered off are obtained, wherein the de-noising coefficient is confirmed in advance through no-load audio signals which are detected out when fetal heart sound detection equipment is under no-load; and outputting the fetal heart sound signals. According to the embodiment, the invention also provides a fetal heart sound processing device and the fetal heart sound detection equipment.
Owner:EDAN INSTR
Domestic and medical two-purpose sound recording and fetal heart sound listening stethoscope
The invention relates to a domestic and medical two-purpose sound recording and fetal heart sound listening stethoscope, and belongs to the field of medical apparatuses. A stethoscope head (1), a sound conduction tube, a three-way tube and a listening tube protecting port are mutually connected, so that a pipeline stethoscope is constituted; a microphone, an amplifier (2), a recording-playing module (3), a transmission module (4), a power supply and the like are arranged in the stethoscope head, so that an electronic stethoscope, which is capable of recording and playing sound, is formed to listen two different stethoscopic sound effects. People can identify sounds from left side and right side through two ears, but the known stethoscopes are operated in a mode of communicating left and right ears, and subsequently, a listening habit is changed and a hearing threshold is narrowed; with the application of the stethoscope which adopts a novel dual-sound-track circuit, the listening habit is recovered and the hearing threshold is widened, so as to bring about benefits for doctors in auscultation. In addition, known fetal heart rate instruments cannot output original heartbeat sound, while by virtue of the novel stethoscope, actual fetal heartbeat sound can be listened, and meanwhile, the sound can be recorded or played; and when the sound is recorded, a voice catalog can be additionally annotated by virtue of the microphone, so that functions of searching and tracing an electronic medical record can be developed. Moreover, a carotid artery plaque detection method is more convenient and rapider than the known stethoscopes.
Owner:曹松林 +1
Abdomen supporting belt capable of detecting fetal heart sounds
The invention relates to an abdomen supporting belt capable of detecting fetal heart sounds. Signal collecting heads with suction cups, a signal processing device body and a fixing bag are installed at an abdomen-supporting-belt abdomen part of an abdomen supporting belt body; the abdomen-supporting-belt abdomen part is placed at the maternity abdomen, the signal collecting heads with the suction cups are sucked to the abdomen, the signal processing device body in the fixing bag is opened, and variation of the fetal heart sounds can be monitored. The aim that after the abdomen supporting belt is worn, the fetal heart sounds can also be monitored as required is achieved, and the abdomen supporting belt is convenient, suitable and easy to manufacture.
Owner:刘洪
Method and device for improving fetal heart sound signal collecting quality
ActiveCN103565479ACounteracts the effect of weakening ultrasound echo signalsGood ultrasonic echo signalHeart/pulse rate measurement devicesMuscle exercising devicesControl signalFetus monitoring
The invention relates to the technical field of medical monitoring, in particular to the technical field of medical fetus monitoring, and particularly relates to a method and device for improving fetal heart sound signal collecting quality. According to the technical scheme, uterine contraction which is performing is recognized by the utilization of the judgment for uterine contraction values, the influences on ultrasonic echo signals caused by the fact that the fetal heart beat weakens are eliminated through the method for controlling signal gains intelligently, good ultrasonic echo signals during uterine contraction are guaranteed, and due to intelligent control, changes of the gains cannot cause signal saturation and distortion. Thus, good fetus heart sound signals can be obtained and high-quality signals are provided for follow-up processing.
Owner:EDAN INSTR
Method and device for improving quality of fetal heart sound signal acquisition
ActiveCN103610472ACounteracts weakening of pulsation intensityIncreased ultrasonic impedanceUltrasonic/sonic/infrasonic diagnosticsInfrasonic diagnosticsUterine musclesEngineering
The invention relates to the technical field of medical monitoring, in particular to the technical field of medical fetal monitoring, and particularly relates to a method and a device for improving quality of fetal heart sound signal acquisition. The technical scheme includes that on-going uterine contraction can be recognized by the aid of judgment upon a uterine contraction pressure numerical value; weakening of throbbing strength of the fetal heart and the affect that a uterine muscle wall gets larger in density due to contraction so as to increase ultrasonic impedance and ultrasonic attenuation are offset by means of intelligently controlling ultrasonic emission quantity, so that good ultrasonic echo signals can be guaranteed, unsafe ultrasonic emission or signal saturation distortion due to changes of the ultrasonic emission quantity does not occur under intelligent control, good fetal heart sound signals can be acquired, and high-quality signals are provided for subsequent treatment.
Owner:EDAN INSTR
Wearing-type fetal heart sound monitoring instrument based on multi-angle stethoscope array
InactiveCN104586425AEasy to operateIncrease flexibilityStethoscopeObstetricsSignal processing circuits
The invention discloses a wearing-type fetal heart sound monitoring instrument based on a multi-angle stethoscope array. The wearing-type fetal heart sound monitoring instrument comprises a cavity-type bellyband, a sound monitoring array fixed on the back surface of the cavity-type bellyband and used for monitoring fetal heart sound, a signal processing circuit arranged in an inner cavity of the cavity-type bellyband and a handheld mobile terminal arranged outside the cavity-type bellyband and wirelessly connected with the signal processing circuit. The wearing-type fetal heart sound monitoring instrument is ingenious in design, simple in structure, safe and convenient to operate, capable of easily collecting and displaying the fetal heat sound in a pregnant woman body and relatively high in practical value.
Owner:杨波
Denoising method, system and device for fetal heart sound and storage medium
ActiveCN110101407APractical applicationStethoscopeSingular value decompositionFrequency characteristic
Owner:SOUTH CHINA NORMAL UNIVERSITY +1
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