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 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 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 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 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 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 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.