WO2021208490A1 - 一种基于深度神经网络的血压测量方法及装置 - Google Patents
一种基于深度神经网络的血压测量方法及装置 Download PDFInfo
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/72—Signal processing specially adapted for physiological signals or for diagnostic purposes
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/02—Detecting, measuring or recording pulse, heart rate, blood pressure or blood flow; Combined pulse/heart-rate/blood pressure determination; Evaluating a cardiovascular condition not otherwise provided for, e.g. using combinations of techniques provided for in this group with electrocardiography or electroauscultation; Heart catheters for measuring blood pressure
- A61B5/021—Measuring pressure in heart or blood vessels
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
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Definitions
- the present invention relates to the field of computer technology, in particular to a blood pressure measurement method and device based on a deep neural network.
- Pulse Wave Velocity Pulse Wave Velocity
- the pulse wave characteristic parameter method mainly establishes a model with blood pressure by extracting the characteristics of the pulse wave waveform.
- the measurement equipment is simple, but there is also a problem of poor robustness. For certain groups of people, such as patients with hypertension or arrhythmia, its corresponding Feature extraction is difficult, and it is often difficult to achieve accurate measurement.
- the method also includes:
- the sample training signal is input into the deep neural network, and the training operation is performed according to the migration learning to obtain the deep neural network blood pressure model.
- performing a sample preprocessing operation on the sample signal to obtain the sample training signal includes:
- the signal acquisition module is used to perform signal acquisition operations on the acquisition object to obtain pulse waves and ECG signals;
- the sample training module is used to input sample training signals into the deep neural network based on the deep neural network, and perform training operations according to migration learning to obtain the deep neural network blood pressure model.
- the signal filtering unit is used to filter the sample pulse wave and the sample ECG signal by using a band-pass filter to obtain the noise-reduced sample pulse wave and the noise-reduced sample ECG signal;
- the segmentation processing unit is used to perform segmentation processing on the sample pulse waveform diagram and the sample electrocardiogram waveform diagram according to a preset segmentation method to obtain a segmented signal;
- the signal sampling unit is used to perform sliding sampling operation on the sample training signal to obtain multiple network training samples
- the network construction unit is used to construct a deep neural network-based convolutional neural network containing several computing units and use multiple network training samples to train the convolutional neural network to obtain a pre-trained network;
- the blood pressure measurement method and device based on the deep neural network in the embodiment of the present invention receives a signal collection request, which at least carries identification information of the collection object; and then performs a signal collection operation on the collection object according to the signal collection request, Acquire the pulse wave and ECG signal of the collection object; then, perform preprocessing operations on the acquired pulse wave and ECG signal to obtain the preprocessed signal with noise reduction and low interference, to a certain extent to ensure that the subsequent accurate acquisition of blood pressure values Furthermore, based on the trained deep neural network blood pressure model, the pre-processed signal is input into the deep neural network blood pressure model for measurement operation, and the systolic and diastolic blood pressure corresponding to the pre-processed signal are obtained, which can ensure the acquisition of blood pressure value
- the accuracy and completeness of the BP; output identification information, systolic blood pressure and diastolic blood pressure, the whole process of the present invention is simple to operate, low in computational complexity, and low cost; the blood pressure measurement
- FIG. 2 is a preferred flow chart of the blood pressure measurement method based on the deep neural network of the present invention
- Figure 6 is a schematic diagram of a blood pressure measurement device based on a deep neural network of the present invention.
- FIG. 9 is another preferred schematic diagram of the blood pressure measurement device based on the deep neural network of the present invention.
- a blood pressure measurement method based on a deep neural network is provided. See FIG. 1, which includes the following steps:
- S1 Receive a signal collection request, the signal collection request carries at least the identification information of the collection object;
- S3 Perform preprocessing operations on pulse waves and ECG signals to obtain preprocessed signals
- S5 Output identification information, systolic blood pressure and diastolic blood pressure.
- the signal acquisition request carries at least the identification information of the acquisition object; and then the signal acquisition operation is performed on the acquisition object according to the signal acquisition request to obtain the signal acquisition request.
- the signal acquisition operation is performed on the acquisition object to acquire the pulse wave and ECG signal, which can be specifically performed on the fingertips of the acquisition object’s fingers, or the radial artery of the wrist, the carotid artery, etc.
- the pulse wave and ECG signal are collected at the pulse of the aorta on the body surface.
- the pulse wave and ECG signal are preprocessed to obtain the preprocessed signal.
- the acquired pulse wave and ECG signal can be filtered and denoised, divided by heart beat, normalized, etc. Signal processing, to reduce impurities and interference in the signal, to a certain extent, to ensure the efficiency of the subsequent accurate acquisition of the blood pressure value of the collected object.
- the preprocessed signal is input into the deep neural network blood pressure model for measurement operation, and the systolic and diastolic blood pressure corresponding to the preprocessed signal is obtained, which can be specifically passed
- the signal waveform of the processed pre-processed signal is input as input to the deep neural network blood pressure model for a specific population obtained by migration learning training, and the continuous blood pressure of the collected object is calculated to obtain the contraction of the collected object. Pressure and diastolic blood pressure and output.
- the sample signal in the database is obtained.
- the sample signal carries at least the sample pulse wave and the sample ECG signal. Specifically, it can be obtained by reading a local public database, and obtaining a large number of pre-collected data such as hypertension in the public database. Sample pulse waves and sample ECG signals of patients and patients with arrhythmia facilitate the establishment of subsequent deep neural network blood pressure models.
- this embodiment is based on a deep neural network, inputs sample training signals into the deep neural network, and performs training operations according to transfer learning.
- the deep neural network may be used to perform processing on the processed sample training signals of people with arrhythmia. Transfer learning to obtain a deep neural network blood pressure model.
- the model training model using the migration method has a low training cost, can output continuous blood pressure heart by heart, and has high measurement accuracy to ensure the accuracy of obtaining blood pressure values.
- the deep neural network is essentially a convolutional neural network including several convolutional layers, pooling layers, batch normalization layers, and fully connected layers, and is established with systolic blood pressure and diastolic blood pressure as the output Model.
- the sample preprocessing operation is performed on the sample signal, and the steps of obtaining the sample training signal include:
- S701 Use a band-pass filter to filter the sample pulse wave and the sample ECG signal to obtain the noise-reduced sample pulse wave and the noise-reduced sample ECG signal;
- S702 Obtain a sample pulse waveform diagram and a sample ECG waveform diagram corresponding to the noise-reduction sample pulse wave and the noise-reduction sample ECG signal;
- S703 Perform segmentation processing on the sample pulse waveform diagram and the sample ECG waveform diagram according to the preset segmentation mode to obtain a segmented signal
- S704 Perform normalization processing on the segmented signal to obtain a sample training signal.
- the value of L is generally three times the sampling rate Fs.
- the back end of the ECG is zero-filled, and the two ends of the PPG are zero-filled , So that the length of all samples is the same.
- normalization processing is performed on the segmented signal, specifically by making its value in the interval [0, 1] to obtain the sample training signal.
- this embodiment autonomously extracts feature modeling based on signal waveforms, does not require high waveform quality, does not need to detect dicrotic waves, and is easy to check.
- the sample training signal is input into the deep neural network, and the training operation is performed according to transfer learning, and the steps of obtaining the deep neural network blood pressure model include:
- S803 Use the pre-training network to perform migration learning on the sample signal to obtain a deep neural network blood pressure model.
- performing a sliding sampling operation on the sample training signal to obtain multiple network training samples is to implement a sliding window, ensure the accuracy of feature extraction of the sample training signal, and reduce subsequent training operations. Repeating the calculation of convolution can reduce the computational complexity to a certain extent and improve the efficiency of subsequent acquisition of blood pressure values.
- a convolutional neural network containing several computing units based on a deep neural network is constructed and multiple network training samples are used to train the convolutional neural network to obtain a pre-trained network, specifically by constructing a deep neural network, It is specifically a convolutional neural network that includes several computing units.
- Each computing unit includes a convolutional layer, a batch normalization layer, and a pooling layer. After 3-5 unit calculations, the obtained features are input to the first layer. After connecting the layers, a pre-trained network can be obtained that can simultaneously output systolic and diastolic blood pressures SBP p and DBP p.
- a pre-training network is used to perform migration learning on sample signals to obtain a deep neural network blood pressure model.
- the pre-training network can be specifically used to perform migration learning for specific population data, even if most parameters are frozen (ie Keep unchanged), only fine-tune the last fully connected layer of the pre-trained network, that is, make the new learning rate 1/10 of the original learning rate to obtain the deep neural network blood pressure model, where the fine-tuning process is similar to sampling the sample signal The process of preprocessing operations.
- a convolutional neural network containing several computing units based on a deep neural network is constructed, and multiple network training samples are used to train the convolutional neural network using a stochastic gradient descent optimization algorithm.
- a deep neural network-based convolutional neural network containing several computing units is constructed and multiple network training samples are used to train the convolutional neural network using a stochastic gradient descent optimization algorithm.
- the Loss function is jointly established
- the training of the model can output systolic and diastolic blood pressure at the same time. While accurately acquiring the blood pressure value of the collected object, it can also facilitate the follow-up to provide an early warning of the risk of sudden rise and fall in blood pressure according to the change in the output blood pressure value, and remind the patient to take it in time Seek medical attention or protection.
- the deep neural network of this embodiment is specifically a convolutional neural network including several computing units, each computing unit includes a convolutional layer, a batch normalization layer, and a pooling layer. After 3-5 units of calculation, After inputting the obtained features into a fully connected layer, the systolic and diastolic blood pressures SBP p and DBP p can be output at the same time.
- the model is trained by jointly establishing the Loss function, where the loss function Loss is the mean square error, which is specifically expressed as follows:
- SBP t and DBP t are the actual systolic and diastolic blood pressure, and n is the number of samples;
- SBP p and DBP p can be expressed as follows:
- A is the activation function
- W and b are the parameters of the model.
- the gradient of W is calculated from the Loss function, and the gradient is continuously updated with a preset specific learning rate (quantitatively and randomly changes the value of W), where the learning rate is generally 0.0001, and the learning rate can be set according to actual application requirements, and there is no specific limitation here; then, the Loss is minimized along the direction of the gradient, and finally the training is stopped when the Loss no longer changes, or the training is stopped when the number of training reaches a certain value , Usually the number of training does not exceed 10,000 times.
- FIG. 12 is a comparison between the blood pressure and actual target systolic blood pressure measured by a group of collected subjects. It can be found that in each blood pressure interval, the error between the predicted value and the target value is small.
- the method further includes:
- the blood pressure value of the collection object is continuously measured according to the preset time period, so as to monitor the change of the blood pressure value of the collection object within the time period, that is, the blood pressure can be provided according to the change of the output blood pressure value.
- Early warning of sudden rise and fall risk remind patients to seek medical treatment or protection in time, specifically by comparing historical systolic blood pressure and historical diastolic blood pressure with the current output systolic blood pressure and diastolic blood pressure respectively, that is, by calculating the historical systolic blood pressure and the current diastolic blood pressure.
- the absolute value of the difference of systolic blood pressure is divided by the historical systolic pressure to obtain the rate of change of the systolic blood pressure.
- the rate of change of diastolic blood pressure can be obtained.
- the rate of change is greater than the expected
- an early warning reminder is issued to the user terminal, where the early warning reminder may be in the form of timely information, email, or signal alarm, etc., and there is no specific limitation here.
- the preset change threshold is set according to actual application requirements, and is usually set to 20%.
- a blood pressure measurement device based on a deep neural network including:
- the request receiving module 601 is configured to receive a signal collection request, and the signal collection request at least carries identification information of the collection object;
- the signal acquisition module 602 is used to perform signal acquisition operations on the acquisition object to obtain pulse waves and ECG signals;
- the preprocessing module 603 is used to perform preprocessing operations on pulse waves and ECG signals to obtain preprocessed signals;
- the blood pressure measurement module 604 is used to input the preprocessed signal into the deep neural network blood pressure model based on the trained deep neural network blood pressure model for measurement operation, and obtain the systolic blood pressure and the diastolic blood pressure corresponding to the preprocessed signal;
- the blood pressure measurement device based on the deep neural network in the embodiment of the present invention receives a signal collection request, which at least carries identification information of the collection object; and then performs a signal collection operation on the collection object according to the signal collection request to obtain the signal collection request.
- pulse wave refers to the photoplethysmographic signal of the object to be collected
- ECG signal refers to the single-lead electrocardiographic signal of the object to be collected.
- the photoplethysmographic pulse wave of the finger of the object is collected, the signal length is 5 minutes, and the sampling frequency It is 250Hz.
- the pulse wave and ECG signal are preprocessed to obtain the preprocessed signal.
- the acquired pulse wave and ECG signal can be filtered and denoised, divided by heart beat, normalized, etc. Signal processing, to reduce impurities and interference in the signal, to a certain extent, to ensure the efficiency of the subsequent accurate acquisition of the blood pressure value of the collected object.
- the preprocessed signal is input into the deep neural network blood pressure model for measurement operation, and the systolic and diastolic blood pressure corresponding to the preprocessed signal is obtained, which can be specifically passed
- the signal waveform of the processed pre-processed signal is input as input to the deep neural network blood pressure model for a specific population obtained by migration learning training, and the continuous blood pressure of the collected object is calculated to obtain the contraction of the collected object. Pressure and diastolic blood pressure and output.
- the device further includes:
- the sample acquisition module 701 is used to acquire sample signals in the database, and the sample signals at least carry sample pulse waves and sample ECG signals;
- the sample training module 703 is used to input sample training signals into the deep neural network based on the deep neural network, and perform training operations according to migration learning to obtain the deep neural network blood pressure model.
- the sample signal in the database is obtained.
- the sample signal carries at least the sample pulse wave and the sample ECG signal. Specifically, it can be obtained by reading a local public database, and obtaining a large number of pre-collected data such as hypertension in the public database. Sample pulse waves and sample ECG signals of patients and patients with arrhythmia facilitate the establishment of subsequent deep neural network blood pressure models.
- the sample pulse wave and the sample ECG signal are preprocessed, specifically by extracting the same cycle of the ECG signal and the waveform of the pulse wave to obtain a specific form of tissue, which is used as a blood pressure model.
- Input modeling can ensure the accuracy of subsequent acquisition of blood pressure values to a certain extent.
- the deep neural network is essentially a convolutional neural network including several convolutional layers, pooling layers, batch normalization layers, and fully connected layers, and is established with systolic blood pressure and diastolic blood pressure as the output Model.
- the sample processing module 702 includes:
- the signal filtering unit 7021 is configured to use a band-pass filter to filter the sample pulse wave and the sample ECG signal to obtain the noise-reduced sample pulse wave and the noise-reduced sample ECG signal;
- the waveform image acquisition unit 7022 is used to acquire the sample pulse waveform image and the sample electrocardiogram waveform image corresponding to the noise-reduction sample pulse wave and the noise-reduction sample ECG signal;
- the normalization processing unit 7024 is used to perform normalization processing on the segmented signal to obtain a sample training signal.
- sample pulse waveform diagram and the sample ECG waveform diagram corresponding to the noise-reduction sample pulse wave and the noise-reduction sample ECG signal and compare the sample pulse waveform diagram and the sample ECG waveform diagram according to a preset segmentation method Perform segmentation processing to obtain segmented signals; in order to be able to extract the waveforms of the ECG and pulse waves of the same period to obtain a specific form of tissue, which is used as the input of the subsequent blood pressure model for modeling, so as to obtain a continuous target for specific groups of people Deep neural network blood pressure model for blood pressure measurement.
- the value of L is generally three times the sampling rate Fs.
- the back end of the ECG is zero-filled, and the two ends of the PPG are zero-filled , So that the length of all samples is the same.
- the sample training module 703 includes:
- the signal sampling unit 7031 is used to perform a sliding sampling operation on the sample training signal to obtain multiple network training samples;
- the network construction unit 7032 is used to construct a deep neural network-based convolutional neural network containing several computing units and use multiple network training samples to perform training operations on the convolutional neural network to obtain a pre-trained network;
- the transfer learning unit 7033 is used to perform transfer learning on the sample signal using the pre-training network to obtain a deep neural network blood pressure model.
- performing a sliding sampling operation on the sample training signal to obtain multiple network training samples is to implement a sliding window, ensure the accuracy of feature extraction of the sample training signal, and reduce subsequent training operations. Repeating the calculation of convolution can reduce the computational complexity to a certain extent and improve the efficiency of subsequent acquisition of blood pressure values.
- a convolutional neural network containing several computing units based on a deep neural network is constructed and multiple network training samples are used to train the convolutional neural network to obtain a pre-trained network, specifically by constructing a deep neural network, It is specifically a convolutional neural network that includes several computing units.
- Each computing unit includes a convolutional layer, a batch normalization layer, and a pooling layer. After 3-5 unit calculations, the obtained features are input to the first layer. After connecting the layers, a pre-trained network can be obtained that can simultaneously output systolic and diastolic blood pressures SBP p and DBP p.
- a pre-training network is used to perform migration learning on sample signals to obtain a deep neural network blood pressure model.
- the pre-training network can be specifically used to perform migration learning for specific population data, even if most parameters are frozen (ie Keep unchanged), only fine-tune the last fully connected layer of the pre-trained network, that is, make the new learning rate 1/10 of the original learning rate to obtain the deep neural network blood pressure model, where the fine-tuning process is similar to sampling the sample signal The process of preprocessing operations.
- a convolutional neural network containing several computing units based on a deep neural network is constructed, and multiple network training samples are used to train the convolutional neural network using a stochastic gradient descent optimization algorithm.
- a deep neural network-based convolutional neural network containing several computing units is constructed and multiple network training samples are used to train the convolutional neural network using a stochastic gradient descent optimization algorithm.
- the Loss function is jointly established
- the training of the model can output systolic and diastolic blood pressure at the same time. While accurately acquiring the blood pressure value of the collected object, it can also facilitate the follow-up to provide an early warning of the risk of sudden rise and fall in blood pressure according to the change in the output blood pressure value, and remind the patient to take it in time Seek medical attention or protection.
- the deep neural network of this embodiment is specifically a convolutional neural network including several computing units, each computing unit includes a convolutional layer, a batch normalization layer, and a pooling layer. After 3-5 units of calculation, After inputting the obtained features into a fully connected layer, the systolic and diastolic blood pressures SBP p and DBP p can be output at the same time.
- the model is trained by jointly establishing the Loss function, where the loss function Loss is the mean square error, which is specifically expressed as follows:
- SBP t and DBP t are the actual systolic and diastolic blood pressure, and n is the number of samples;
- SBP p and DBP p can be expressed as follows:
- A is the activation function
- W and b are the parameters of the model.
- the gradient of W is calculated from the Loss function, and the gradient is continuously updated with a preset specific learning rate (quantitatively and randomly changes the value of W), where the learning rate is generally 0.0001, and the learning rate can be set according to actual application requirements, and there is no specific limitation here; then, the Loss is minimized along the direction of the gradient, and finally the training is stopped when the Loss no longer changes, or the training is stopped when the number of training reaches a certain value , Usually the number of training does not exceed 10,000 times.
- the method further includes:
- the history acquisition module 101 is used to acquire the historical systolic blood pressure and historical diastolic blood pressure of the collection object in the previous cycle;
- the numerical value comparison module 102 is used to compare the historical systolic blood pressure and the historical diastolic blood pressure with the currently output systolic blood pressure and the diastolic blood pressure respectively;
- the early warning prompt module 103 is configured to send an early warning prompt to the user terminal if the rate of change of the value is greater than the preset change threshold.
- the blood pressure value of the collection object is continuously measured according to the preset time period, so as to monitor the change of the blood pressure value of the collection object within the time period, that is, the blood pressure can be provided according to the change of the output blood pressure value.
- Early warning of sudden rise and fall risk remind patients to seek medical treatment or protection in time, specifically by comparing the historical systolic blood pressure and historical diastolic blood pressure with the current output systolic blood pressure and diastolic blood pressure respectively, that is, by calculating the historical systolic blood pressure and the current diastolic blood pressure.
- the absolute value of the systolic blood pressure difference is divided by the historical systolic blood pressure to obtain the change rate of the systolic blood pressure. Similarly, the change rate of the diastolic blood pressure can be obtained.
- the change threshold is set, an early warning reminder is issued to the user terminal, where the early warning reminder may be in the form of timely information, email, or signal alarm, etc., and there is no specific limitation here.
- the preset change threshold is set according to actual application requirements, and is usually set to 20%.
- the migration learning method based on the deep neural network of the present invention first establishes a pre-training model by using the ECG signal and the photoplethysmographic signal on the basis of the public database in the early stage; then, the migration is performed through the data for the specific population Learning, that is, updating a small number of parameters, on the one hand, it can avoid the subjective selection problem of manual feature extraction and the problem of feature point dependence, which is easy to implement, and on the other hand, it can be collected for specific populations, especially hypertension patients and arrhythmia patients. For objects that are difficult to monitor with the existing technology, convenient and accurate continuous blood pressure monitoring is realized.
- the advantages of the blood pressure measurement method and device based on the deep neural network of the present invention are:
- the disclosed technical content can be implemented in other ways.
- the system embodiment described above is only illustrative.
- the division of units may be a logical function division, and there may be other divisions in actual implementation.
- multiple units or components may be combined or integrated into Another system, or some features can be ignored, or not implemented.
- the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, units or modules, and may be in electrical or other forms.
- the units described as separate components may or may not be physically separate, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple units. Some or all of the units may be selected according to actual needs to achieve the objectives of the solutions of the embodiments.
- the functional units in the various embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units may be integrated into one unit.
- the above-mentioned integrated unit can be implemented in the form of hardware or software functional unit.
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Claims (10)
- 一种基于深度神经网络的血压测量方法,其特征在于,包括以下步骤:接收信号采集请求,所述信号采集请求至少携带有采集对象的标识信息;对所述采集对象进行信号采集操作,获取脉搏波以及心电信号;对所述脉搏波和心电信号进行预处理操作,得到预处理信号;基于训练好的深度神经网络血压模型,将所述预处理信号输入至所述深度神经网络血压模型中进行测量操作,得到与所述预处理信号相对应的收缩压以及舒张压;输出所述标识信息、所述收缩压以及所述舒张压。
- 根据权利要求1所述的基于深度神经网络的血压测量方法,其特征在于,在所述基于训练好的深度神经网络血压模型的步骤之前,所述方法还包括:获取数据库中的样本信号,所述样本信号至少携带样本脉搏波以及样本心电信号;对所述样本脉搏波以及样本心电信号进行所述预处理操作,得到样本训练信号;基于深度神经网络,将所述样本训练信号输入至所述深度神经网络中,按照迁移学习进行训练操作,得到所述深度神经网络血压模型。
- 根据权利要求2所述的基于深度神经网络的血压测量方法,其特征在于,所述对所述样本信号进行样本预处理操作,得到样本训练信号的步骤包括:使用带通滤波器对所述样本脉搏波以及样本心电信号进行过滤操作,得到降噪样本脉搏波以及降噪样本心电信号;获取与所述降噪样本脉搏波以及降噪样本心电信号相对应的样本脉搏波形图以及样本心电波形图;按照预设的分段方式对所述样本脉搏波形图以及样本心电波形图进行分段处理,得到分段信号;对所述分段信号进行归一化处理,得到所述样本训练信号。
- 根据权利要求2所述的基于深度神经网络的血压测量方法,其特征在于,所述基于深度神经网络,将所述样本训练信号输入至所述深度神经网络中,按照迁移学习进行训练操作,得到所述深度神经网络血压模型的步骤包括:对所述样本训练信号进行滑动取样操作,获得多个网络训练样本;构建基于深度神经网络的包含若干计算单元的卷积神经网络并使用所述多个网络训练样本对所述卷积神经网络进行训练操作,得到预训练网络;使用所述预训练网络对所述样本信号进行迁移学习,得到所述深度神经网络血压模型。
- 根据权利要求4所述的基于深度神经网络的血压测量方法,其特征在于,构建基于深度神经网络的包含若干计算单元的卷积神经网络并使用多个网络训练样本使用随机梯度下降优化算法对所述卷积神经网络进行训练。
- 根据权利要求1所述的基于深度神经网络的血压测量方法,其特征在于,在所述输出所述标识信息、所述收缩压以及所述舒张压的步骤之后,所述方法还包括:获取所述采集对象的上一周期的历史收缩压以及历史舒张压;将所述历史收缩压以及历史舒张压分别与当前输出的所述收缩压以及舒张压进行数值比较;若数值的变化率大于预设变化阈值,则向用户终端发出预警提示。
- 一种基于深度神经网络的血压测量装置,其特征在于,包括:请求接收模块,用于接收信号采集请求,所述信号采集请求至少携带有采集对象的标识信息;信号采集模块,用于对所述采集对象进行信号采集操作,获取脉搏波以及心电信号;预处理模块,用于对所述脉搏波和心电信号进行预处理操作,得到预处理信号;血压测量模块,用于基于训练好的深度神经网络血压模型,将所述预处理信号输入至所述深度神经网络血压模型中进行测量操作,得到与所述 预处理信号相对应的收缩压以及舒张压;数据输出模块,用于输出所述标识信息、所述收缩压以及所述舒张压。
- 根据权利要求7所述的基于深度神经网络的血压测量装置,其特征在于,所述装置还包括:样本获取模块,用于获取数据库中的样本信号,所述样本信号至少携带样本脉搏波以及样本心电信号;样本处理模块,用于对所述样本脉搏波以及样本心电信号进行所述预处理操作,得到样本训练信号;样本训练模块,用于基于深度神经网络,将所述样本训练信号输入至所述深度神经网络中,按照迁移学习进行训练操作,得到所述深度神经网络血压模型。
- 根据权利要求8所述的基于深度神经网络的血压测量装置,其特征在于,所述样本处理模块包括:信号过滤单元,用于使用带通滤波器对所述样本脉搏波以及样本心电信号进行过滤操作,得到降噪样本脉搏波以及降噪样本心电信号;波形图获取单元,用于获取与所述降噪样本脉搏波以及降噪样本心电信号相对应的样本脉搏波形图以及样本心电波形图;分段处理单元,用于按照预设的分段方式对所述样本脉搏波形图以及样本心电波形图进行分段处理,得到分段信号;归一化处理单元,用于对所述分段信号进行归一化处理,得到所述样 本训练信号。
- 根据权利要求8所述的基于深度神经网络的血压测量装置,其特征在于,所述样本训练模块包括:信号取样单元,用于对所述样本训练信号进行滑动取样操作,获得多个网络训练样本;网络构建单元,用于构建基于深度神经网络的包含若干计算单元的卷积神经网络并使用所述多个网络训练样本对所述卷积神经网络进行训练操作,得到预训练网络;迁移学习单元,用于使用所述预训练网络对所述样本信号进行迁移学习,得到所述深度神经网络血压模型。
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Free format text: NOTING OF LOSS OF RIGHTS PURSUANT TO RULE 112(1) EPC (EPO FORM 1205A DATED 11.12.2023) |