42 results about "Fetal Heart Tone" patented technology

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.

The invention discloses a fetal heart monitoring apparatus and a fetal hear monitoring method. According to one embodiment, the fetal heart monitoring method includes: setting one of more than three monitoring probes as a transmitting probe and the others as receiving probes; using the transmitting probe to transmit ultrasonic wave; converting each ultrasonic wave received by the receiving probes into audio reflection digital signals; selecting one with highest signal-to-noise ratio from more than two audio reflection digital signals; using the receiving probe which receives the audio reflection digital signal with the highest signal-to-noise ratio, as an optimal monitoring channel, and using the optimal monitoring channel to receive fetal heart acoustic wave, and acquiring fetal heart rate based on fetal heart digital signals converted from the fetal hear acoustic wave. The fetal heart monitoring method according to the embodiment has the advantages that less radiation is caused to the human body during the fetal heart monitoring process, fetal heart measurement accuracy is guaranteed, and long-term fetal heart monitoring is achieved.

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.

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.

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.

A method for synchronously reproducing the Doppler audio signal and rhythm of fetal heart includes such steps as acquiring and storing the Doppler audio signal of fetal heart, calculating the relative rhythm of fetal heart, and synchronously reproducing them. Its device is also disclosed.

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.

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.

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.

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.

The invention provides a fetal heart monitoring system, equipment and a method based on multi-dimensional channel signal processing. The system comprises: a hardware platform which comprises a sound vibration sensor and is used for collecting a fetal heart data signal; an application system which is in communication connection with the hardware platform, acquires the fetal heart data signal, transmits the fetal heart data signal to a cloud computing platform and controls the hardware platform to work; and a cloud computing platform used for carrying out fetal heart sound and fetal heart rate extraction on the fetal heart data signal, carrying out fetal heart positioning according to the fetal heart sound and returning a positioning result to the application system. A Doppler ultrasonic probe is replaced with the sound vibration sensor, so that the fetal heart rate monitoring accuracy is improved, and the medical cost is greatly reduced while the accuracy is improved; fetal heart positioning and data storage are carried out through the cloud, and remote monitoring of medical staff is also facilitated; long-time data acquisition, real-time detection and abnormal real-time reporting can be realized through the cloud.

The invention provides a time domain self-adaptive windowing fetal heart sound noise reduction technology. By adaptively windowing the envelope of fetal heart sound data, this technology retains useful fetal heart sound signals on the envelope and eliminates most of the interference signals. This technology can suppress the noise in the same frequency band as the heart sound signal, improve the signal-to-noise ratio, and can compensate the submerged weak heart sound signal under the background of strong noise. When the heart rate curve is intermittent due to noise interference, this noise reduction technology can make the heart rate curve more continuous.

The invention relates to maternity pants capable of detecting fetal heart sound. The front part of a crotch is sewn with bonding bags, an elastic fixing bag, and a waterproof connecting line. The bonding bag on one side is internally fixedly provided with a signal processing device main body, and the bonding bag on one side is internally fixedly provided with a digital display. When fetal heart sound needs detecting, the fetal heart sound can be detected by absorbing a signal acquisition head with a sucker in the elastic fixing bag on the hypogastrium of a pregnant woman, and starting the signal processing device main body. When the fetal heart sound is needed to be checked, the fetal heart sound number can be checked by taking out the digital display, and the signal acquisition head with the sucker does not need to be taken down. When the maternity pants need cleaning, the maternity pants can be cleaned after taking down the signal processing device main body, the signal acquisition head with the sucker, and the digital display. The maternity pants are convenient and practical.

The invention discloses a fetal heart detection system with a fetal heart position guiding function. The fetal heart detection system comprises an ultrasonic transducer design, a fetal heart meter ultrasonic probe design, a fetal heart signal feature extraction algorithm design, a fetal heart position guiding algorithm design and a fetal heart meter system overall design. According to the system, the fetal heart position searching function can be achieved, fetal heart orientation information can be given, a pregnant woman without fetal heart measurement experience can be guided to find an accurate fetal heart measurement position, the accurate fetal heart rate is obtained, and the problems that due to the fact that the fetal heart measurement position is not accurate, the fetal heart rate counting error is large, and fetal heart sound is fuzzy are solved. The system is large in fetal heart signal detection range, accurate in fetal heart rate measurement and calculation, simple in operation and capable of meeting fetal heart detection requirements in family scenes.

The invention discloses a method for reducing noise of fetal heart sound signal based on non-negative matrix decomposition. The existing filtering methods have limitations in improving the signal-to-noise ratio of fetal heart sound signals. The invention performs short-time Fourier transform on the signal to obtain the amplitude information matrix and phase angle information matrix; performs singular value decomposition and non-negative matrix decomposition on the amplitude information matrix, selects useful features according to the characteristic matrix and coefficient matrix, and combines them to obtain The amplitude information matrix after noise reduction; phase compensation is performed on the phase angle information matrix to obtain the compensated phase matrix; short-time Fourier inverse transform is performed on the amplitude information matrix and the compensated phase matrix to obtain the time domain signal. The singular value decomposition method adopted in the present invention avoids the influence of the randomness of the initial value on the matrix iteration result, and the adopted phase compensation method replaces the original band noise signal phase with the compensated phase, which increases the reliability of the phase signal after noise reduction. Reliability, significantly improved the noise reduction effect of fetal heart sound signal.

The invention belongs to the technical field of sound signal preprocessing, and discloses a fetal heart rate extraction method and system based on an automatic weighted average algorithm in a window. A sensor is used to collect an original fetal heart sound signal; Average operation; normalize the fetal heart sound signal after de-averaging; perform noise reduction processing on the preprocessed fetal heart sound signal; downsample the fetal heart sound data; The fetal heart rate was extracted by the automatic weighted average algorithm from the audio signal; the fetal heart rate data extracted by the automatic weighted average algorithm in the window was further modified by the exponential weighted average algorithm outside the window. The invention uses the windowing method, adopts the idea of ​​averaging to weaken the influence of noise, and proposes an exponentially weighted averaging algorithm within the window, which overcomes the deficiency of interference to the fetal heart rate data when the fetal heart sound data has peak misdetection and missed detection. This makes the fetal heart rate data calculated by the algorithm within the window more accurate.

The invention is a non-negative blind separation fetal heart sound analysis method and device, which includes the following steps: 1) collecting fetal heart sound signals; 2) preprocessing the collected fetal heart sound signals. The preprocessing process adopts a method that can effectively remove noise. Wavelet transform that can maintain the local singularity of the signal; 3) Transform the pre-processed signal into the time-frequency domain to obtain a non-negative spectrum. The method used is: find the wigner-ville distribution of the pre-processed signal and find the modulus Obtain its amplitude spectrum; 4) Use non-negative matrix decomposition for blind separation, process the amplitude spectrum of the fetal heart sound signal, and obtain the non-negative time-frequency component of the fetal heart sound signal; 5) Draw the envelope curve; 6) Analyze the envelope , set dual thresholds to achieve envelope segmentation, and calculate instantaneous heart rate. The invention has good flexibility, can more accurately segment fetal heart sound signals, and has high instantaneous heart rate recognition accuracy.

The present invention discloses a method, a system and a device for assistant positioning used for fetal heart sound monitoring. The method comprises the steps of: collecting audio data of two fetal heart sound tracks; marking the two fetal heart sound tracks on corresponding position points of a rectangular region; employing the marked position points to calculate fetal heart sound signal intensities corresponding to all the unknown position points in the rectangular region; and performing rendering according to color to generate a rendering graph according to the fetal heart sound signal intensity corresponding to each position point in the rectangular region. The system comprises a collection unit, a marking unit, a calculation unit and a rendering unit. The device comprises a storage and a processor configured to execute the method for assistant positioning used for fetal heart sound monitoring. According to the invention, the method, the system and the device for assistant positioning used for fetal heart sound monitoring can assist users in rapid and accurate positioning of the optimal monitoring positions, are high in convenience and operation mutual experience, and can be widely applied in the fetal heart sound monitoring field.

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.

The invention discloses a fetal heart sound processing method and device, medical equipment and a computer storage medium. The fetal heart sound processing method comprises the steps of: collecting fetal heart sound signal data; analyzing the fetal heart sound signal data to obtain a fetal heart sound beat signal, and performing frequency domain feature processing according to the fetal heart sound beat signal to obtain target fetal heart sound data; and playing the target fetal heart sound data. The invention solves the technical problems that fetal heart sound monitoring equipment is low insignal monitoring quality, and effectiveness and accuracy of signals cannot be guaranteed.

The invention discloses a fetal heart sound processing method and processing device. The method includes: obtaining fetal heart sound data and noise data; performing empirical mode decomposition on the fetal heart sound data and noise data to obtain the fetal heart sound natural mode component sequence and Noise natural mode component sequence; obtain the processed natural mode component sequence according to the fetal heart sound natural mode component sequence and noise natural mode component sequence; extract the instantaneous value of each processed natural mode component in the processed natural mode component sequence Frequency, and superimpose the processed natural mode components with instantaneous frequency between 20Hz and 200Hz to obtain the combined natural mode components; perform noise reduction processing on the combined natural mode components to obtain heartbeat waveforms, and extract the combined natural mode components The fetal heart rate is obtained from the first heart sound feature and the second heart sound feature, and the present invention can obtain both the fetal heart rate and the heartbeat waveform of the fetus, and the display result is clearer and more intuitive.

The invention discloses a fetal heart rate calculation method which comprises the following steps: preprocessing a fetal heart sound signal X to remove noise to obtain fetal heart sound data X' after noise reduction; performing audio framing on the fetal heart sound data X' after noise reduction, after framing, the fetal heart sound signal of the ith frame being X'i, and the time vector corresponding to each frame being T; calculating short-time energy ei of the X'i, and generating a short-time energy vector E; finding out the maximum value emax of the short-time energy vector E, and setting an energy threshold thr; comparing the value of the short-time energy vector E with an energy threshold thr, recording time points Ti corresponding to all frames of which ei is greater than or equal to thr, and generating a short-time energy peak time vector T '; calculating the T' forward difference of the peak time vector, obtaining time difference vectors, working out the average value of the time difference vectors, and the fetal heart rate can be obtained. The fetal heart rate can be rapidly and accurately calculated, a certain anti-interference capacity is achieved, and meanwhile the wearable heart and lung sound wireless monitoring system used by the method is provided.

The invention discloses a fetal heart sound denoising method, system, device and storage medium, comprising the steps of: converting the acquired fetal heart sound audio signal into a digital signal reconstruction matrix, performing singular value decomposition on the reconstruction matrix and reverse Calculate the original component signal corresponding to each singular value, select the original component signal whose frequency domain signal feature is consistent with the frequency domain signal feature of the fetal heart sound audio signal according to the frequency domain signal feature of the original component signal, and superimpose The fetal heart sound noise reduction signal is obtained after selecting the original component signal. The present invention transforms the selection of the singular value to the frequency domain, selects by comparing the frequency characteristics of the component signal and the fetal heart sound audio signal, and compares and analyzes the frequency domain signal characteristics of the component signal corresponding to the singular value and the fetal heart sound audio signal. The correlation of frequency features is selected, which is more in line with practical applications, so as to obtain more accurate noise reduction signals. The invention can be widely used in the technical field of fetal heart sound processing.

The invention discloses a fetal heart detection method based on fetal heart position guidance, comprising: design of an ultrasonic transducer, design of an ultrasonic probe for a fetal heart rate instrument, design of a fetal heart signal feature extraction algorithm, and design of a fetal heart position guidance algorithm. The fetal heart rate detection method of the present invention can realize the function of searching for the fetal heart position and give the fetal heart position information, and can guide pregnant women who have no experience in fetal heart rate measurement to find an accurate fetal heart rate measurement position, thereby obtaining accurate fetal heart rate and solving the problem Inaccurate fetal heart rate measurement position leads to large errors in fetal heart rate counting and fuzzy fetal heart sounds. Its fetal heart rate signal has a large detection range, accurate measurement and calculation of fetal heart rate, and simple operation, which can meet the fetal heart rate in family scenarios. Testing needs.

The invention relates to the technical field of medical monitoring, in particular to the technical field of medical fetal monitoring, in particular to a method and a device for improving the quality of fetal heart sound signal collection. The technical solution provided by the present invention uses the judgment of the value of the uterine systolic pressure to identify the ongoing uterine contraction, and uses the method of intelligently controlling the signal gain to offset the weakening of the fetal heart rate and the weakening of the ultrasonic echo signal. Ensure good ultrasound echo signals during uterine contractions, and intelligent control will not cause signal saturation and distortion due to gain changes, so as to obtain good fetal heart sound signals and provide high-quality signals for subsequent processing.

The invention relates to the technical field of medical monitoring, in particular to the technical field of medical fetal monitoring, in particular to a method and a device for improving the quality of fetal heart sound signal collection. The technical solution provided by the invention uses the judgment of the value of the uterine systolic pressure to identify the ongoing uterine contraction, and uses the method of intelligently controlling the amount of ultrasonic emission to counteract the weakening of the fetal heart rate and the density of the uterine muscle wall due to contraction. Larger, the effect on the increase of ultrasonic impedance and the increase of ultrasonic attenuation ensures a good ultrasonic echo signal during uterine contraction, and intelligent control will not cause unsafe ultrasonic emission or signal due to changes in the amount of ultrasonic emission. Saturation and distortion, so as to obtain a good fetal heart sound signal, and provide high-quality signals for subsequent processing.

The invention discloses a fetal heart sound signal noise reduction method based on non-negative matrix factorization. An existing filtering method has limitation in improving the signal-to-noise ratio of fetal heart sound signals. The method comprises the steps of performing short-time Fourier transform on a signal to obtain an amplitude information matrix and a phase angle information matrix; performing singular value decomposition and non-negative matrix decomposition on the amplitude information matrix, selecting useful features according to the feature matrix and the coefficient matrix, and combining to obtain a denoised amplitude information matrix; performing phase compensation on the phase angle information matrix to obtain a compensated phase matrix; and performing short-time inverse Fourier transform on the amplitude information matrix and the compensated phase matrix to obtain a denoised time domain signal. The singular value decomposition method adopted by the invention avoids the influence of the randomness of the initial value on the matrix iteration result, and the adopted phase compensation method uses the compensated phase to replace the original noisy signal phase, so that the credibility of the phase signal after noise reduction is improved, and the noise reduction effect of the fetal heart sound signal is obviously improved.

The invention provides a fetal heart monitoring system, equipment and a method. The system comprises: a hardware platform which comprises a sound vibration sensor and is used for collecting fetal heart signal data; an application system which is in communication connection with the hardware platform and used for acquiring the fetal heart signal data, transmitting the fetal heart signal data to a cloud computing platform and controlling the hardware platform to work; and a cloud computing platform used for carrying out fetal heart sound and fetal heart rate extraction on the fetal heart signaldata, carrying out fetal heart positioning according to the fetal heart sound and returning a positioning result to the application system. A Doppler ultrasonic probe is replaced with the sound vibration sensor, so that the fetal heart rate monitoring accuracy is improved, and the medical cost is greatly reduced while the accuracy is improved; fetal heart positioning and data storage are carried out through the cloud, and remote monitoring of medical staff is also facilitated; and long-time data acquisition, real-time detection and abnormal real-time reporting can be realized through the cloud.

The invention discloses a fetal heart detection method based on fetal heart position guiding. The method comprises the steps of ultrasonic transducer design, fetus-voice meter ultrasonic probe design, fetal heart signal feature extraction algorithm design and fetal heart position guiding algorithm design. By means of the fetal heart detection method, the fetal heart position searching function can be achieved, fetal heart orientation information can be given, a pregnant woman without fetal heart measurement experience can be guided to find an accurate fetal heart measurement position, and therefore the accurate fetal heart rate is obtained. The problems of large fetal heart rate counting error, fuzzy fetal heart sound and the like caused by inaccurate fetal heart measurement position are solved, the fetal heart signal detection range is large, the fetal heart rate is accurately measured and calculated, the operation is simple, and the fetal heart detection requirement in a family scene can be met.