Blood pressure measuring device and method with Korotkoff sound recognition and playback functions

Abstract

The invention relates to the technical field of blood pressure measurement, and discloses a blood pressure measurement device and method with Korotkoff sound recognition and playback functions, and the blood pressure measurement device comprises an air pressure sensor, a vibration sensor and a control module; the air pressure sensor is used for collecting a pressure analog signal, and the pressure analog signal is used for representing the air pressure in the air bag; the vibration sensor is used for collecting brachial artery pulse signals; the control module is used for controlling the air pressure in the air bag, identifying Korotkoff sound from brachial artery pulse signals and obtaining systolic pressure data and diastolic pressure data according to the Korotkoff sound and the air pressure, and the control module is further used for responding to playback operation to play back the air bag depressurization process and the process from appearance of the Korotkoff sound to the end and displaying the blood pressure value. And the user can conveniently analyze the Korotkoff sound to verify the accuracy of the blood pressure measurement result.

Description

Technical Field

[0001] The present invention relates to the technical field of blood pressure measurement, and in particular to a blood pressure measurement device, method, and electronic equipment, and in particular to a blood pressure meter with Korotkoff sound recognition and playback functions. Background Art

[0002] Blood pressure can provide a basis for the diagnosis of some diseases (such as kidney disease, endocrine disease or heart disease, etc.). The process of blood pressure measurement based on the Korotkoff sound method is generally as follows: place the stethoscope on the lower side of the cuff's air bag and close it to the skin, pressurize the air bag, and when the air pressure in the air bag reaches a certain pressure value, the blood flow in the upper arm artery can be blocked, and then the gas in the air bag is released to slowly reduce the pressure. The pressure value corresponding to the first Korotkoff sound is determined as the high pressure value, and the pressure value corresponding to the last Korotkoff sound is determined as the low pressure value.

[0003] In the above-mentioned blood pressure measurement process, the identification of Korotkoff sounds relies on the hearing and subjective judgment of medical staff, and is also easily affected by environmental noise, which may cause deviations in the blood pressure value finally determined by the medical staff, affecting the accuracy of blood pressure measurement. Summary of the invention

[0004] In view of this, the present invention provides a blood pressure measurement device and method with Korotkoff sounds recognition and playback functions, which accurately identify blood pressure values ​​through Korotkoff sounds and effectively verify blood pressure values ​​through Korotkoff sounds playback, so as to improve the problem of low accuracy of blood pressure measurement.

[0005] In a first aspect, the present invention provides a blood pressure measuring device with Korotkoff sound recognition and playback functions, the blood pressure measuring device comprising a control module, an air pressure sensor and a vibration sensor; the air pressure sensor is used to collect a pressure analog signal, the pressure analog signal is used to characterize the air pressure in an airbag; the vibration sensor is fixed in the cuff and is used to collect a brachial artery pulsation signal; the control module is used to control the air pressure in the airbag and to recognize the Korotkoff sounds in the brachial artery pulsation signal collected by the vibration sensor, and to obtain systolic pressure data and diastolic pressure data based on the Korotkoff sounds and the air pressure in the airbag; and the control module is also used to respond to a playback operation to playback and display the process of the air pressure dropping in the airbag, the appearance of Korotkoff sounds until the end, and the systolic pressure data and the diastolic pressure data.

[0006] The vibration sensor is a piezoelectric sensor or a microphone.

[0007] The playback of the air pressure drop process in the airbag is played back through a digital display, and the playback of the appearance of Korotkoff sounds until the end of the process is played back through a sound player and / or through the beating of a heartbeat graphic symbol on a display screen.

[0008] The control module is also used to send the Korotkoff sounds, the air pressure in the airbag, the systolic pressure data and the diastolic pressure data, and the corresponding measurement time as the associated blood pressure measurement data to an external device for storage and playback. During playback, the blood pressure measurement data to be played back can be selected for playback.

[0009] The blood pressure measuring device provided in this embodiment stores the Korotkoff sounds identified during the blood pressure measurement process, the air pressure during the airbag decompression process, the systolic pressure and diastolic pressure obtained based on the Korotkoff sounds identification, and the measurement time, and synchronously plays back the identified Korotkoff sounds and air pressure in response to a playback operation and displays the systolic pressure and diastolic pressure, thereby providing the user with the original measurement data of the blood pressure measurement, and verifying whether the blood pressure measurement result is accurate and improving the accuracy of the blood pressure measurement result by listening to or observing the played back Korotkoff sounds.

[0010] In a second aspect, the present invention provides a blood pressure measurement device, the blood pressure measurement device comprising an air pressure sensor, a piezoelectric sensor and a control module;

[0011] An air pressure sensor is used to collect a pressure analog signal, and the pressure analog signal is used to represent the air pressure in the airbag;

[0012] A piezoelectric sensor is fixed in the cuff and is used to collect the brachial artery pulsation signal;

[0013] The control module is used to obtain the pressure simulation signal and the brachial artery pulsation signal, and to identify the brachial artery pulsation signal to obtain the Korotkoff sound signal, and obtain the Korotkoff sound data according to the Korotkoff sound signal. The control module is also used to process the pressure simulation signal and the Korotkoff sound signal to obtain the blood pressure data, and the blood pressure data includes the air pressure and the blood pressure value during the airbag decompression process, and the blood pressure value is the systolic pressure and the diastolic pressure. The control module is also used to synchronously replay the Korotkoff sound data and the blood pressure data in response to the playback operation, and to display the blood pressure value at the same time. The air pressure sensor and the piezoelectric sensor are respectively connected to the control module for communication.

[0014] The blood pressure measurement device provided in this embodiment can accurately identify Korotkoff sound signals from brachial artery pulsation signals through the mutual cooperation of air pressure sensors, piezoelectric sensors and control modules, and then accurately determine Korotkoff sound data and blood pressure data corresponding to the Korotkoff sound data. In response to the playback operation, the Korotkoff sounds and air pressure are synchronously played back and the systolic pressure and diastolic pressure are displayed at the same time, thereby providing original measurement data for determining the blood pressure value, which helps to improve the accuracy of blood pressure measurement.

[0015] In a third aspect, the present invention provides a blood pressure measurement method with Korotkoff sound recognition and playback functions, the method comprising:

[0016] Acquire the pressure analog signal and brachial artery pulsation signal of the air pressure drop process in the airbag;

[0017] Identify the brachial artery pulsation signal to obtain the Korotkoff sound signal;

[0018] Processing the pressure simulation signal to obtain the air pressure in the airbag during the air pressure drop process;

[0019] Processing the pressure analog signal and the Korotkoff sound signal to obtain the systolic pressure data and the diastolic pressure data;

[0020] In response to the playback operation, the process of the air pressure drop in the air bag, the process of the appearance of Korotkoff sounds until the end, and the systolic pressure data and diastolic pressure data are synchronously played back and displayed.

[0021] In a fourth aspect, the present invention further provides a blood pressure measurement method, the method comprising:

[0022] Acquire pressure analog signal and brachial artery pulsation signal;

[0023] Identify the brachial artery pulsation signal to obtain a Korotkoff sound signal, and obtain Korotkoff sound data according to the Korotkoff sound signal;

[0024] Processing the pressure analog signal and the Korotkoff sound signal to obtain blood pressure data, wherein the blood pressure data includes the air pressure and blood pressure values ​​during the airbag decompression process, and the blood pressure values ​​are systolic pressure and diastolic pressure;

[0025] In response to the playback operation, the Korotkoff sound data and the blood pressure data are synchronously played back with the Korotkoff sound and air pressure, and the blood pressure value is displayed.

[0026] The blood pressure measurement method provided in this embodiment identifies the Korotkoff sound signal based on the brachial artery pulsation signal, and then obtains the blood pressure data based on the Korotkoff sound signal and the pressure simulation signal of the air bag, identifies the air pressure corresponding to the appearance of the Korotkoff sound as the systolic pressure, and identifies the air pressure corresponding to the disappearance of the Korotkoff sound as the diastolic pressure, to ensure the accuracy of the measurement result, and associates the Korotkoff sound, blood pressure data, and measurement time of the measurement process as one-time blood pressure measurement data for storage, and synchronously replays the Korotkoff sound and the air pressure of the air bag depressurization process in response to the playback operation, and displays the systolic pressure when the Korotkoff sound appears and the diastolic pressure when the Korotkoff sound disappears, so that the user can verify whether the blood pressure measurement is accurate based on the process from the appearance to the disappearance of the Korotkoff sound.

[0027] In a fifth aspect, the present invention provides an electronic device comprising: a memory and a processor, the memory and the processor being communicatively connected to each other, the memory storing computer instructions, and the processor executing the method of the third aspect or the fourth aspect or any corresponding embodiment thereof by executing the computer instructions. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the related technologies, the drawings required for use in the specific embodiments or the related technical descriptions will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0029] Figure 1 is a structural schematic diagram of a blood pressure measurement device according to an embodiment of the present invention;

[0030] Figure 2 is a schematic structural diagram of an airbag according to an embodiment of the present invention;

[0031] Figure 3 is a schematic structural diagram of another blood pressure measurement device according to an embodiment of the present invention;

[0032] Figure 4 is a schematic diagram of a blood pressure measurement scenario according to an embodiment of the present invention;

[0033] Figure 5 is a schematic diagram of a curve of a Korotkoff sound signal according to an embodiment of the present invention;

[0034] Figure 6 is a schematic diagram of a curve of another Korotkoff sound signal according to an embodiment of the present invention;

[0035] Figure 7 is a schematic diagram of a spectrum diagram of a Korotkoff sound signal according to an embodiment of the present invention;

[0036] Figure 8 is a schematic diagram of a Koch digital signal processing flow according to an embodiment of the present invention;

[0037] Fig. 9 is a schematic diagram of a display interface according to an embodiment of the present invention;

[0038] Fig.10 is a flow chart of a blood pressure measurement method according to an embodiment of the present invention;

[0039] Fig.11 is a schematic diagram of the process of Korotkoff sound playback and blood pressure playback according to an embodiment of the present invention;

[0040] Fig.12 is a flow chart of another blood pressure measurement method according to an embodiment of the present invention;

[0041] Fig.13 is a flow chart of another blood pressure measurement method according to an embodiment of the present invention;

[0042] Fig.14It is a schematic diagram of the hardware structure of the electronic device according to an embodiment of the present invention.

[0043] : Figure numerals: 101, air pressure sensor; 102, piezoelectric sensor; 1021, first piezoelectric sheet; 1022, second piezoelectric sheet; 103, control module; 104, storage module; 105, audio output module; 106, display module; 107, cuff; 1071, fixing part; 108, air bag; 1081, air nozzle; 109, air tube; 110, air pump; 200, host; 201, first volume key; 202, second volume key; 203, control key; 204, icon display key; 205, play key; 310, processor; 320, memory; 330, communication interface. DETAILED DESCRIPTION

[0044] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0045] Blood pressure is the pressure exerted by blood flowing in blood vessels on the side walls of blood vessels. It is the driving force that pushes blood to flow in blood vessels and is an important parameter that reflects the basic vital signs of the human body. Blood pressure can provide a basis for doctors to assess the physical condition of patients. For example, it can be used to determine whether a patient has hypertension, cardiovascular disease or kidney disease, etc. Therefore, blood pressure measurement is very important.

[0046] The most recognized and accurate method for non-invasive blood pressure measurement is the Korotkoff sound method, which determines the blood pressure value by monitoring the sound of blood flow in the brachial artery when the cuff's air bag is deflated. However, there are many limitations in the process of using the Korotkoff sound method to measure blood pressure, such as relying on the hearing and subjective judgment of medical staff, and being easily affected by environmental noise, which may lead to errors in the measured blood pressure and affect the medical staff's diagnosis of the disease.

[0047] In view of this, the present invention provides a blood pressure measurement device with Korotkoff sound recognition and playback functions, that is, a sphygmomanometer with Korotkoff sound recognition and playback functions. Through the cooperation of the air pressure sensor, the piezoelectric sensor and the control module, the Korotkoff sound signal can be accurately identified from the brachial artery pulsation signal, and then the Korotkoff sound data and the air pressure data corresponding to the Korotkoff sound data can be accurately determined, so as to provide the original measurement data for determining the blood pressure value, which is helpful to improve the accuracy of blood pressure measurement. Korotkoff sound refers to the sound of the blood flow of the brachial artery impacting the blood vessel wall when the air bag changes from inflation and pressurization to deflation and decompression. The first sound of the blood flow impacting the blood vessel wall is the first Korotkoff sound in the blood pressure measurement process. The pressure in the air bag corresponding to the first Korotkoff sound is the systolic pressure of the blood pressure value, that is, the high pressure. The sound when the sound of the blood flow impacting the blood vessel wall weakens or disappears is the last Korotkoff sound in the blood pressure measurement process. The pressure in the air bag corresponding to the last Korotkoff sound is the diastolic pressure of the blood pressure value, that is, the low pressure.

[0048] The present invention obtains blood pressure values ​​based on Korotkoff sounds and the pressure in the airbag, and the blood pressure values ​​are systolic pressure and diastolic pressure. Moreover, the blood pressure measuring device of the present invention plays back the Korotkoff sounds used to determine the blood pressure during the blood pressure measurement process, the air pressure during the airbag decompression process, and displays the blood pressure value in response to the user's playback operation. Specifically, in response to the playback operation, the Korotkoff sounds and air pressure are synchronously played back and the systolic pressure and diastolic pressure are displayed at the same time. The playback of the Korotkoff sounds is represented by sound playback or the beating of the heartbeat graphic symbol on the display screen, the playback of the airbag decompression process is represented by the display of the change of numbers on the display screen, and the blood pressure value is displayed by the combination of numbers and the words "systolic pressure" or "high pressure", "diastolic pressure" or "low pressure".

[0049] The embodiment provided by the present invention can identify Korotkoff sounds to obtain blood pressure values ​​and play back the Korotkoff sounds to determine whether the blood pressure values ​​are accurate, so that users can verify the accuracy of blood pressure measurement results by analyzing the Korotkoff sounds.

[0050] The blood pressure measuring device provided by the present invention is described in detail below with reference to the accompanying drawings.

[0051] like Figure 1 , Figure 3 As shown, the blood pressure measuring device includes but is not limited to a host 200 , an air pressure sensor 101 , a piezoelectric sensor 102 , a control module 103 , a storage module 104 , an audio output module 105 and a display module 106 .

[0052] The piezoelectric sensor 102 is fixed in the cuff 107, and the fixing method includes but is not limited to bonding or snapping, etc. The air pressure sensor 101 is set in the host 200, and the air pressure sensor 101 and the piezoelectric sensor 102 are both communicatively connected to the control module 103. The piezoelectric sensor 102 is a vibration sensor, and another vibration sensor, namely a microphone, can also be used in this embodiment.

[0053] The air pressure sensor 101 is used to collect pressure analog signals and transmit the pressure analog signals to the control module 103. The pressure analog signals are used to represent the air pressure in the airbag of the cuff 107. The piezoelectric sensor 102 is used to collect brachial artery pulsation signals and transmit the brachial artery pulsation signals to the control module 103. The brachial artery pulsation signals are used to represent the sound of blood flow in the brachial artery during blood pressure measurement.

[0054] As an embodiment, the control module 103 is used to control the air pressure in the airbag and identify the Korotkoff sounds in the brachial artery pulsation signal collected by the vibration sensor, and obtain the systolic pressure data and the diastolic pressure data according to the Korotkoff sounds and the air pressure in the airbag; and the control module 103 is also used to respond to the playback operation to play back and display the air pressure drop process in the airbag, the appearance of Korotkoff sounds until the end process, and the systolic pressure data and the diastolic pressure data. The vibration sensor is a piezoelectric sensor 102 or a microphone. Moreover, the playback of the air pressure drop process in the airbag is digitally displayed, and the playback of the appearance of Korotkoff sounds until the end process is played back through the audio output module 105, i.e., the sound player, and / or through the display module 106, i.e., the beating of the heartbeat graphic symbol on the display screen. The control module is also used to store the blood pressure measurement data in the local storage module 104, and send the blood pressure measurement data to an external device such as a mobile phone or a computer device in a wireless or wired manner for storage, and perform synchronous playback of Korotkoff sounds and pressure and display of blood pressure values ​​according to the playback operation.

[0055] As another embodiment, the control module 103 is used to identify the brachial artery pulsation signal to obtain the Korotkoff sound signal, and to process the pressure simulation signal and the Korotkoff sound signal to obtain the blood pressure data, wherein the blood pressure data includes the blood pressure value as the blood pressure measurement result, namely the systolic pressure identified as high pressure and the diastolic pressure identified as low pressure; the control module 103 is also used to obtain the Korotkoff sound data according to the Korotkoff sound signal; the control module 103 also stores the blood pressure data and the Korotkoff sound data synchronously in the storage module 104, and is used to perform synchronous playback of the Korotkoff sound playback and the air pressure playback in response to the playback operation and simultaneously display the blood pressure value or display the blood pressure value after the playback is completed, and establish a corresponding relationship between the Korotkoff sound data and the air pressure based on the playback time period, namely, the Korotkoff sound data corresponding to the air pressure is played back while the air pressure is played back, and the air pressure corresponding to the Korotkoff sound data is played back while the Korotkoff sound data is played back. That is, the control module 103 synchronously plays back the Korotkoff sound data and the blood pressure data in response to the playback operation, namely, synchronously plays back the Korotkoff sound, the air pressure during the airbag decompression process, and the blood pressure value.

[0056] The present invention does not limit the type and specific location of the air pressure sensor 101, as long as it can collect the air pressure in the air bag 108 of the cuff 107 during the blood pressure measurement process. For example, the air pressure sensor 101 can be a piezoelectric air pressure sensor, a capacitive air pressure sensor, or a strain gauge air pressure sensor.

[0057] For example, Figure 1 and Figure 2 As shown, the cuff 107 has a storage space, and an air bag 108 for storing air is arranged in the storage space. An air nozzle 1081 is arranged on the air bag 108. The air bag 108 is connected to the air pump 110 through the air nozzle 1081 and the air pipe 109, and the air pump 110 is connected to the control module 103. In this embodiment, the air pressure sensor 101 can be arranged in one end of the air pipe 109 close to the air pump 110, and the pressure of the air bag 108 is transmitted to the air pressure sensor 101 through the air nozzle 1081 and the air pipe 109. The specific position of the air pressure sensor 101 on the air pipe 109 can be determined by the designer based on experience.

[0058] Optionally, an air valve (not shown in the figure) is further provided at one end of the trachea 109 close to the control air pump 110, and the air valve is connected to the control module 103. The control module 103 can adjust the speed of pressurization or decompression of the air bag 108 by controlling the opening and closing degree of the air valve to control the air pressure in the air bag 108. Slow and steady decompression helps to collect Korotkoff sounds more accurately.

[0059] Specifically, the opening and closing degree is used to characterize the degree of opening or closing of the air valve. The opening and closing degree can be expressed by a proportional value or an angle value. If the opening and closing degree is defined to characterize the degree of opening, 100% means that the air valve is fully open. At this time, the larger the opening and closing degree (the closer to 100%), the greater the gas flow rate and the faster the airbag pressurizes or decompresses.

[0060] The embodiments of the present invention do not limit the specific position of the piezoelectric sensor 102, as long as Korotkoff sounds can be collected during the blood pressure measurement process. The piezoelectric sensor 102 can be fixedly arranged on the lower side of the airbag 108 in the cuff 107 so that the piezoelectric sensor 102 is located at the brachial artery position of the arm when the blood pressure is measured. Two piezoelectric sensors can be provided, corresponding to the brachial artery position of the left arm and the brachial artery position of the right arm respectively. The lower side of the airbag 108 refers to the side of the airbag 108 facing the user's skin during blood pressure measurement, that is, the inner wall of the airbag. Exemplarily, the piezoelectric sensor 102 can also be a microphone. Both piezoelectric sensors and microphones are vibration sensors.

[0061] The control module 103 is also communicatively connected with the storage module 104, the audio output module 105 and the display module 106 respectively. The control module 103 is used to obtain the pressure simulation signal and the brachial artery pulsation signal, and to identify the brachial artery pulsation signal to obtain the Korotkoff sound signal and obtain the Korotkoff sound data according to the Korotkoff sound signal. The control module 103 is also used to process the pressure simulation signal and the Korotkoff sound signal to obtain the blood pressure data, wherein the blood pressure data includes the air pressure and blood pressure values ​​of the air bag decompression process, and the blood pressure values ​​are the systolic pressure and the diastolic pressure; the control module 103 is also used to store the blood pressure data and the Korotkoff sound data in the storage module at the same time, and to synchronously play back the Korotkoff sound data and the blood pressure data in response to the playback operation, so as to control the audio output module 105 to play back the Korotkoff sound data read from the storage module 104, and control the display module 106 to play back the air pressure of the blood pressure data corresponding to the Korotkoff sound data read from the storage module 104 and display the blood pressure value. That is, when the audio output module 105 plays Korotkoff sounds, the display module 106 displays the pressure in the airbag 108 when the Korotkoff sounds appear. The control module 103 is also used to associate the blood pressure measurement data of the blood pressure measurement process, including the corresponding measurement time, air pressure, blood pressure value and Korotkoff sound data, and store them in the storage module, and in response to the playback operation, play back the process of the air pressure drop in the airbag, the appearance of Korotkoff sounds until the end, and display the blood pressure value at the same time.

[0062] Specifically, the control module 103 first identifies the brachial artery pulsation signal to obtain a Korotkoff sound signal, filters the pressure analog signal based on the Korotkoff sound signal, retains the pressure analog signal corresponding to the acquisition time of the Korotkoff sound signal, converts the Korotkoff sound signal and the pressure analog signal corresponding to the Korotkoff sound signal to obtain blood pressure data, the blood pressure data includes the air pressure and blood pressure value during the airbag decompression process, the format of the blood pressure data is adapted to the format that can be recognized by the display module, and converts the Korotkoff sound signal to obtain Korotkoff sound data, the format of the Korotkoff sound data is adapted to the format that can be recognized by the audio output module.

[0063] That is to say, after the control module 103 obtains the pressure analog signal from the air pressure sensor 101 and the brachial artery pulsation signal from the piezoelectric sensor 102, it processes the pressure analog signal to obtain the pressure inside the airbag, identifies the brachial artery pulsation signal to obtain the Korotkoff sound signal, and then filters the pressure analog signal based on the Korotkoff sound signal, and converts the filtered pressure analog signal and the Korotkoff sound signal into blood pressure data that can be recognized by the display module 106, displays the blood pressure measurement results, namely the systolic pressure and the diastolic pressure, converts the Korotkoff sound signal into Korotkoff sound data that can be recognized by the audio output module 105, and stores the blood pressure data and the Korotkoff sound data in the storage module 104 at the same time.

[0064] Afterwards, if the user performs a playback operation (for example, pressing a preset button with a preset action), the playback operation also includes the user selecting the blood pressure measurement data to be played back through the function button on the blood pressure measuring device, and then pressing the preset button with a preset action to start the playback operation. In response to the playback operation, the control module 103 synchronously plays back the pressure, Korotkoff sound and blood pressure value of the airbag decompression process, reads the Korotkoff sound data from the storage module 104, and controls the audio output module 105 to play the Korotkoff sound that occurs during the blood pressure measurement process. At the same time, the control module 103 also reads the blood pressure data from the storage module 104, and controls the display module 106 to simultaneously display the air pressure corresponding to the Korotkoff sound played during the blood pressure measurement process and the blood pressure value at the same time. That is, when the user performs the playback operation, the blood pressure measuring device synchronously plays back the Korotkoff sound data and the air pressure data and displays the blood pressure value. Among them, the process of conversion processing is introduced below, and will not be described in detail here.

[0065] It should be noted that in order to ensure the synchronous collection of Korotkoff sounds and air pressure, the collection start time of the air pressure sensor 101 and the collection start time of the piezoelectric sensor 102 are the same. The collection start time of the air pressure sensor 101 refers to the time when the air pressure sensor 101 starts to collect pressure analog signals, and the collection start time of the piezoelectric sensor 102 refers to the time when the piezoelectric sensor 102 starts to collect brachial artery pulsation signals.

[0066] Exemplarily, the collection start time of the air pressure sensor 101 and the collection start time of the piezoelectric sensor 102 may be synchronized by a timer or other timing devices.

[0067] Exemplarily, the control module 103 in this embodiment can be a central processing unit (CPU), a microcontroller unit (MCU) or a programmable logic device that implements the above functions. The storage module 104 can be a common storage medium, such as a secure digital memory card (SD), a flash memory or a random access memory (RAM). The audio output module 105 can be a speaker or a headset, and the display module 106 can be a liquid crystal display, a light emitting diode (LED) display or a touch screen.

[0068] It should be understood that Figure 1 As shown, the cuff 107 is also provided with a fixing part 1071 , which includes but is not limited to a strap or Velcro.

[0069] Specifically, Figure 3As shown, the air pressure sensor 101 , the air pump 110 , the control module 103 , the storage module 104 , the audio output module 105 and the display module 106 can all be integrated on the host 200 .

[0070] Below Figure 1 , Figure 3 and Figure 4 As an example, the process of measuring blood pressure using the blood pressure measuring device of the first embodiment and the second embodiment provided by the present invention is described. Among them, the air pump 110, the control module 103, the storage module 104, the audio output module 105 and the display module 106 are integrated in Figure 3 The display module 106 is a display screen of the host 200, and a heartbeat graphic symbol is displayed on the display screen, such as Fig. 9 As shown, during the test process, the heartbeat graphic symbol displays the frequency and process of Korotkoff sounds auscultated by the auscultation method in a beating manner, and during the Korotkoff sounds playback process, the heartbeat graphic symbol displays the frequency and process of Korotkoff sounds playback in a beating manner. Of course, the playback of Korotkoff sounds can also be played by the audio output module 105.

[0071] When medical staff measure the patient's blood pressure or the user measures the blood pressure by himself, first, Figure 3 As shown, the cuff 107 is curled and fixed on the user's arm through the fixing piece 1071, so that the piezoelectric sensor 102 is located at the brachial artery of the arm. Then, the user starts the blood pressure measurement, and the control module 103 in the host 200 controls the air pump 110 to inflate the airbag 108 through the trachea 109 and the air nozzle 1081 in response to the measurement operation, and increases the pressure of the airbag 108 until the air pressure in the airbag can block the blood flow of the arterial blood vessels. Afterwards, the control module 103 controls the air pump 110 to deflate the airbag 108 through the trachea 109 and the air nozzle 1081, so that the pressure in the airbag 108 slowly decreases. In this process, the air pressure sensor 101 collects the air pressure in the airbag during the deflation process in real time, and sends a pressure simulation signal representing the air pressure in the airbag to the control module 103, and the piezoelectric sensor 102 collects the brachial artery pulsation signal in real time, and sends the brachial artery pulsation signal to the control module 103.

[0072] After receiving the pressure simulation signal and the brachial artery pulsation signal, the control module 103 identifies the brachial artery pulsation signal to obtain the Korotkoff sound signal, and processes the pressure simulation signal to obtain the air pressure in the airbag, identifies the air pressure in the airbag corresponding to the first Korotkoff sound as the systolic pressure, and identifies the air pressure in the airbag corresponding to the Korotkoff sound disappearing or weakening as the diastolic pressure; moreover, the Korotkoff sound, air pressure and blood pressure value of the blood pressure measurement process are stored locally in real time or sent to an external device for storage after the blood pressure measurement is completed, and the control module 103 synchronously replays the Korotkoff sound and air pressure of the blood pressure measurement process in response to the playback operation, displays the systolic pressure when the Korotkoff sound appears, displays the diastolic pressure when the Korotkoff sound disappears or weakens, or displays the systolic pressure and diastolic pressure after the Korotkoff sound and pressure playback are completed. The embodiment provided by the present invention can not only identify the Korotkoff sound for accurate blood pressure measurement, but also replay the air pressure and Korotkoff sound of the blood pressure measurement process, so that the user can verify the accuracy of the blood pressure measurement by analyzing the changes in the Korotkoff sound.

[0073] As another embodiment, after receiving the pressure simulation signal and the brachial artery pulsation signal, the control module 103 can also identify the brachial artery pulsation signal to obtain the Korotkoff sound signal and obtain the Korotkoff sound data based on the Korotkoff sound signal, and then process the pressure simulation signal and the Korotkoff sound signal to obtain the blood pressure data, the blood pressure data including the air pressure data and the blood pressure value identified based on the Korotkoff sound, and then store the blood pressure data and the Korotkoff sound data in the storage module 104, and can also establish an association between the blood pressure data, the Korotkoff sound data, and the corresponding measurement time and store them in the storage module 104 as blood pressure measurement data. When the user performs a playback operation, the control module 103 plays back the Korotkoff sound of the blood pressure measurement process, the air pressure and the blood pressure value of the airbag decompression process in response to the playback operation, specifically: the control module 103 reads the Korotkoff sound data from the storage module 104, and controls the audio output module 105 to play the Korotkoff sound or display the Korotkoff sound through the beating of the heartbeat graphic symbol on the display screen, or the audio output module 105 plays the Korotkoff sound and the beating of the heartbeat graphic symbol on the display screen to display the Korotkoff sound and play back the Korotkoff sound at the same time, at the same time, the control module 103 also reads the blood pressure data corresponding to the Korotkoff sound data from the storage module 104, and controls the display module 106 to digitally display the air pressure value in the blood pressure data corresponding to the played Korotkoff sound and display the blood pressure value at the same time. The control module 103 sets the recognition threshold of the Korotkoff sound signal according to the comparison result of the mean value of the arterial signal strength of the brachial artery pulsation signal within the preset time period and the preset threshold, and is used to identify the Korotkoff sound signal according to the recognition threshold, and determine the arterial signal with an arterial signal strength greater than the arterial strength signal corresponding to the recognition threshold as the Korotkoff sound signal.

[0074] The blood pressure measuring device provided in this embodiment can accurately identify Korotkoff sound signals from brachial artery pulsation signals through the cooperation of the air pressure sensor 101, the piezoelectric sensor 102 and the control module 103, and then accurately determine the Korotkoff sound data and the air pressure corresponding to the Korotkoff sound data, and identify the blood pressure value based on the Korotkoff sound and the air pressure, and simultaneously play back the Korotkoff sound and the air pressure of the air pressure drop process in the airbag in response to the playback operation, and display the blood pressure value at the same time. This embodiment provides original measurement data for determining the blood pressure value, which helps to improve the accuracy of blood pressure measurement. By playing back the Korotkoff sound and the air pressure in the airbag, it is convenient for users to observe the appearance and disappearance time of the Korotkoff sound and judge the blood pressure value in combination with the played back air pressure, and provides a self-certification scheme for the accuracy of the blood pressure measurement results.

[0075] At the same time, the blood pressure measuring device can not only record and store the Korotkoff sounds and blood pressure values ​​during the blood pressure measurement process in real time by setting up a storage module 104, an audio output module 105 and a display module 106 to ensure the integrity and accuracy of the data, but can also replay the Korotkoff sounds during the measurement process, the air pressure during the pressure reduction process in the airbag, and the blood pressure values ​​corresponding to the Korotkoff sounds during the measurement process at any time, so as to facilitate medical staff to view and analyze the collected data multiple times, and then determine the user's blood pressure more accurately, which helps medical staff to more accurately judge whether there are phenomena such as arrhythmia or atrial fibrillation.

[0076] Specifically, during the blood pressure measurement process, the air pressure sensor 101 can collect pressure analog signals at the pressure sampling frequency f1 to obtain multiple pressure analog signals, and the piezoelectric sensor 102 can collect brachial artery pulsation signals at the piezoelectric sampling frequency to obtain multiple brachial artery pulsation signals. After the control module 103 obtains multiple pressure analog signals and multiple brachial artery pulsation signals, it can identify the multiple brachial artery pulsation signals to obtain multiple Korotkoff sound signals, process the multiple pressure analog signals to obtain multiple pressure data, i.e., air pressure data in the airbag, and then process the multiple pressure analog signals and multiple Korotkoff sound signals to obtain multiple blood pressure data, and process the multiple Korotkoff sound signals to obtain multiple Korotkoff sound data, where the blood pressure data includes air pressure data. In addition, the multiple air pressure data are provided with air pressure playback numbers according to the collection time, and the multiple Korotkoff sound data are provided with audio playback numbers according to the collection time. When Korotkoff sound playback is performed, the multiple Korotkoff sound data are played according to the audio playback frequency f2.

[0077] In order to ensure that the played Korotkoff sounds correspond to the displayed blood pressure, the control module 103 first determines the playback data segment and the playback time period based on the pressure simulation signal and the Korotkoff sound signal. The playback data segment includes the data segment for Korotkoff sound playback and the data segment for blood pressure playback, and the playback time period is the time period for synchronous playback of Korotkoff sound data and blood pressure data.

[0078] Specifically, the data segment of Korotkoff sound playback includes Korotkoff sound data from the Nth second before the start time of Korotkoff sound data to the Mth second after the Korotkoff sound data disappears, the data segment of air pressure playback is the air pressure data corresponding to the data segment of Korotkoff sound playback, and the playback time period is consistent with the duration of the playback data segment, N≥1, M≥1. Among them, the data segment of Korotkoff sound playback may also include noise data from the Nth second before the start time of Korotkoff sound data to the Mth second after the Korotkoff sound data disappears.

[0079] The playback time period T3 is the difference between the playback end time T2 of the Korotkoff sound playback and the playback start time T1 of the Korotkoff sound playback, that is, T3=T2-T1, the playback end time is the Mth second after the Korotkoff sound data disappears, and the playback start time is the Nth second before the Korotkoff sound data starts.

[0080] Taking N=1 and M=1 as an example, the data segment of Korotkoff sound playback includes Korotkoff sound data from 1 second before the first Korotkoff sound to 1 second after the last Korotkoff sound, and the data segment of air pressure playback is all air pressure data in the time period corresponding to the data segment of Korotkoff sound playback. In this case, the playback time period can be the difference between 1 second before the first Korotkoff sound and 1 second after the last Korotkoff sound.

[0081] After determining the playback time period, the control module 103 is further used to determine the audio playback sequence number of the Korotkoff sound playback based on the playback time period and the audio playback frequency of the Korotkoff sound, and to determine the air pressure playback sequence number of the air pressure playback based on the playback time period and the pressure sampling frequency of the air pressure. The control module 103 is also used to read the Korotkoff sound data from the storage module based on the audio playback sequence number, and to read the air pressure data corresponding to the Korotkoff sound data from the storage module based on the air pressure playback sequence number. The audio playback sequence number and the air pressure playback sequence number establish a corresponding relationship between the Korotkoff sound data and the air pressure data at the same time in the playback time period based on the playback time period, and in the process of playing back the Korotkoff sound, the air pressure value corresponding to the first Korotkoff sound when the Korotkoff sound appears is identified as the systolic pressure for display, and the air pressure value corresponding to the Korotkoff sound when it becomes weak or disappears is identified as the diastolic pressure for display.

[0082] Among them, the audio playback sequence number can be the product of the playback time period T3 and the audio playback frequency f2, that is, the audio playback sequence number is (T3×f2), and the air pressure playback sequence number can be the product of the playback time period T3 and the pressure sampling frequency f1, that is, the air pressure playback sequence number is (T3×f1).

[0083] The above-mentioned process of identifying the brachial artery pulsation signal and obtaining the Korotkoff sound signal is described in detail below with reference to the accompanying drawings.

[0084] Exemplarily, the control module 103 sets a recognition threshold of the Korotkoff sound signal according to a comparison result between an average value of the arterial signal strength of the brachial artery pulsation signal within a preset time period and a preset threshold, and is used to identify the Korotkoff sound signal according to the recognition threshold.

[0085] Specifically, after obtaining the brachial artery pulsation signal, the control module 103 performs bandpass filtering on the brachial artery pulsation signal within a preset frequency range to remove interference signals to obtain an arterial strength signal. Then, the control module 103 obtains the numerical difference between the maximum and minimum values ​​of the arterial strength signal in the preset acquisition time period each time, and uses the numerical difference as the arterial signal strength each time. Afterwards, the control module 103 obtains the average value of the arterial signal strength of all times to obtain the mean value of the arterial signal strength (Value), and sets the recognition threshold of the Korotkoff sound signal according to the comparison result of the mean value of the arterial signal strength, the first preset threshold value, and the second preset threshold value.

[0086] Afterwards, the control module 103 determines whether the strength of each arterial strength signal (i.e., arterial signal strength) is greater than the identification threshold, and if the arterial signal strength is greater than the identification threshold, the arterial strength signal is determined as a Korotkoff sound signal. That is, the control module 103 determines the brachial artery pulsation signal corresponding to the arterial strength signal corresponding to the arterial signal strength greater than the identification threshold as a Korotkoff sound signal.

[0087] Exemplarily, after determining the mean arterial signal intensity, when the mean arterial signal intensity is less than a first preset threshold, the recognition threshold of the Korotkoff sound signal is set to the first recognition threshold; when the mean arterial signal intensity is greater than a second preset threshold, the second recognition threshold of the Korotkoff sound signal is set to P times the mean arterial signal intensity; when the mean arterial signal intensity is between the first preset threshold and the second preset threshold, the third recognition threshold of the Korotkoff sound signal is set to 2P times the mean arterial signal intensity.

[0088] Specifically, the mean value of the arterial signal strength is between the first preset threshold and the second preset threshold, which means that the mean value of the arterial signal strength is greater than or equal to the first preset threshold, and the mean value of the arterial signal strength is less than or equal to the second preset threshold.

[0089] Wherein, P>0, the preset frequency range, the preset acquisition time period, the first preset threshold, the second preset threshold, the first recognition threshold and P can all be empirical values ​​and can be adjusted according to actual needs. For example, the preset frequency range can be [20Hz, 120Hz], the preset acquisition time period can be 1s or 2s, etc., the first preset threshold can be 0.005, the second preset threshold can be 0.008, the first recognition threshold can be 0.015, and P can be 1.5.

[0090] Taking the preset frequency range of [20Hz, 120Hz], the preset acquisition time period of 1s, the first preset threshold of 0.005, the second preset threshold of 0.008, the first recognition threshold of 0.015, and P of 1.5 as an example, the process of identifying the brachial artery pulsation signal and obtaining the Korotkoff sound signal is explained.

[0091] Specifically, after obtaining the brachial artery pulsation signal, the brachial artery pulsation signal is subjected to a bandpass filter of [20 Hz, 120 Hz] to remove interference signals and obtain an arterial strength signal. The arterial strength signal can be obtained as follows: Figure 5 or Figure 6 As shown; after determining the arterial strength signal, determine the maximum and minimum values ​​of each arterial strength signal in the data within 1 second, and use the numerical difference between the maximum and minimum values ​​as the arterial signal strength of each time. After obtaining the arterial signal strength of all arterial strength signals, the average value of the arterial signal strength of all times is determined as the mean arterial signal strength.

[0092] Then the recognition threshold is determined. Specifically, when the mean arterial signal intensity is less than 0.005, the recognition threshold of the Korotkoff sound signal is the first recognition threshold, i.e., 0.015; when the mean arterial signal intensity is greater than 0.008, the recognition threshold of the Korotkoff sound signal is the second recognition threshold, i.e., 1.5×the mean arterial signal intensity; when the mean arterial signal intensity is in the interval [0.005, 0.008], the recognition threshold is the third recognition threshold, i.e., 3×the mean arterial signal intensity.

[0093] Afterwards, it is determined whether the strength of each arterial strength signal is greater than the recognition threshold. If the arterial signal strength is greater than the recognition threshold, the arterial strength signal is determined to be a Korotkoff sound signal. The spectrum of the Korotkoff sound signal can be as follows: Figure 7 shown.

[0094] Specifically, Figure 5 and Figure 6 The horizontal axis represents time, and the unit may be seconds (s), and the vertical axis represents the amplitude of the Korotkoff sound signal, and the unit may be volts (V). Figure 7 The energy distribution of the Korotkoff sound signal at different frequencies is shown.

[0095] In some optional embodiments, after determining the blood pressure data and Korotkoff sound data, the control module 103 is further used to determine the blood pressure measurement result based on the blood pressure data and Korotkoff sound data, and to control the display module 106 to display the blood pressure measurement result. The control module 103 responds to a playback operation after the display module 106 displays the blood pressure measurement result.

[0096] Among them, the blood pressure measurement result includes a low pressure signal and a high pressure signal to achieve the measurement of high blood pressure and low blood pressure. The high pressure signal refers to the blood pressure value corresponding to the first Korotkoff sound during the blood pressure measurement process, and the low pressure signal refers to the blood pressure value corresponding to the disappearance or change of the Korotkoff sound during the blood pressure measurement process. Therefore, the blood pressure data of this embodiment includes the air pressure during the airbag decompression process and the blood pressure value as the blood pressure measurement result.

[0097] In some optional embodiments, the piezoelectric sensor 102 can be connected to the control module 103 through a connection line built into the trachea 109. The piezoelectric sensor 102 includes a first piezoelectric sheet 1021 and a second piezoelectric sheet 1022. One side of the first piezoelectric sheet 1021 and the second piezoelectric sheet 1022 can be fixed inside or outside the airbag 108 by bonding. Preferably, all piezoelectric sheets are arranged on the inner surface of the airbag 108. All piezoelectric sheets on the device of this embodiment collect piezoelectric signals together to obtain the above-mentioned Korotkoff sound signal and transmit it to the control module 103.

[0098] In this embodiment, by placing the connecting wire in the trachea 109, the trachea 109 is reused without the need to lead out a separate connecting wire, so that the host 200 and the cuff 107 only need to be connected through the trachea, simplifying the structure of the blood pressure measurement device.

[0099] Optionally, the first piezoelectric sheet 1021 and the second piezoelectric sheet 1022 are arranged in the lower half of the cuff 107. When measuring blood pressure, one of the first piezoelectric sheet 1021 and the second piezoelectric sheet 1022 corresponds to a position corresponding to one of the left brachial artery and the right brachial artery. In this embodiment, the distance between the first piezoelectric sheet and the second piezoelectric sheet can be 100 mm.

[0100] In some optional implementations, the control module 103 includes an analog-to-digital conversion unit and a processing unit.

[0101] Specifically, the analog-to-digital conversion unit is used to convert the pressure analog signal into the pressure digital signal, and to convert the Korotkoff sound signal into the Korotkoff sound digital signal. Exemplarily, the analog-to-digital conversion unit can be an analog-to-digital converter (ADC) chip or an ADC interface of an MCU.

[0102] The processing unit is used to perform time-frequency transformation processing on the Korotkoff sound digital signal to obtain a first frequency domain feature, and to amplify the first frequency domain feature to obtain a second frequency domain feature. The processing unit is also used to shift the second frequency domain feature as a whole up to a preset frequency to obtain a third frequency domain feature, to perform frequency-time transformation processing on the third frequency domain feature to obtain a first time domain feature, and to amplify the first time domain feature to obtain Korotkoff sound data.

[0103] Specifically, after receiving the Korotkoff sound digital signal, the processing unit performs a fast Fourier transform (FFT) on the Korotkoff sound digital signal to convert the Korotkoff sound digital signal into a first frequency domain feature, then amplifies the first frequency domain feature through an operational amplifier to convert the first frequency domain feature into a second frequency domain feature, then shifts the second frequency domain feature up as a whole by a preset frequency to convert the second frequency domain feature into a third frequency domain feature, then performs an inverse fast Fourier transform (IFFT) on the third frequency domain feature to convert the third frequency domain feature into a first time domain feature, and finally amplifies the first time domain feature through an operational amplifier to convert the first time domain feature into Korotkoff sound data.

[0104] Amplifying the first frequency domain feature refers to amplifying the first frequency domain feature by Q times, where Q may be 10, 20, 30, 100, or more than 100. The preset frequency may be determined by a designer based on the response frequency of the audio output module 105. For example, the audio output module 105 is a speaker, and the frequency range of the first frequency domain feature is 15 Hz to 150 Hz. In this case, the preset frequency may be 30 Hz.

[0105] Exemplarily, the first time domain feature may be amplified based on the following formula (1).

[0106]

[0107] Among them, Output_value represents Korotkoff sound data, input_value represents the first time domain feature, min represents the minimum value of the sound signal in the first time domain feature, max represents the maximum value of the sound signal in the first time domain feature, and the output value range of the sound signal is [-32768, 32767].

[0108] Specifically, after receiving the pressure digital signal, the processing unit is further used to process the Korotkoff sound digital signal and the pressure digital signal based on the calibration parameters to obtain the blood pressure data.

[0109] Exemplarily, the blood pressure data may be determined based on the following formula (2).

[0110] P=(P 1 -P 0 )×K (2)

[0111] Among them, P represents blood pressure data, P 1 Indicates pressure digital signal, P 0represents a calibration parameter, which refers to the pressure digital signal of the air pressure sensor 101 under the ambient atmospheric pressure, and K represents a slope, which refers to the linearity of the air pressure sensor.

[0112] Specifically, after determining the Korotkoff sound digital signal, the pressure digital signal is filtered based on the Korotkoff sound digital signal, the pressure digital signal corresponding to the moment of the Korotkoff sound digital signal is retained, and then the filtered pressure digital signal is input into formula (2) to determine the blood pressure data.

[0113] In this embodiment, after determining the Korotkoff sound digital signal, the Korotkoff sound digital signal is subjected to time-frequency conversion, amplification, frequency shifting, frequency-time conversion and amplification processing, which can improve the problem of poor response of the audio output module 105 due to the fact that the sound frequency of the Korotkoff sound contains more low-frequency components, and enhance the playback effect of the audio output module 105.

[0114] Optionally, the control module 103 further includes a notch filter, which is used to perform denoising on the Korotkoff sound digital signal to obtain a denoised Korotkoff sound digital signal. At this time, the processing unit is specifically used to perform time-frequency transformation on the denoised Korotkoff sound digital signal to obtain a first frequency domain feature.

[0115] Specifically, after determining the Korotkoff sound digital signal, the process of converting the Korotkoff sound digital signal into Korotkoff sound data can be as follows: Figure 8 As shown, the Korotkoff sound digital signal is first subjected to a notch filter for denoising, then subjected to a FFT for time-frequency conversion, then subjected to a first amplifier for amplification (e.g., amplified 100 times), then subjected to a frequency shift process (e.g., shifted up 30 Hz), then subjected to an IFFT for frequency-time conversion, and finally subjected to a second amplifier for amplification (Formula (1)) to obtain Korotkoff sound data.

[0116] In this embodiment, after the Korotkoff sound digital signal is subjected to denoising processing, the Korotkoff sound digital signal is subjected to time-frequency transformation processing, which can filter out the interference of the 50 Hz power frequency in the Korotkoff sound digital signal and improve the accuracy of the Korotkoff sound data obtained based on the Korotkoff sound digital signal.

[0117] Exemplarily, after determining the pressure analog signal and the Korotkoff sound signal, the processing unit is also used to determine a storage time period based on the storage space of the storage module 104, convert the pressure analog signal within the storage time period into a pressure digital signal, obtain air pressure data and blood pressure value by processing the pressure digital signal and the Korotkoff sound signal and store them in the storage space, and convert the Korotkoff sound signal within the storage time period into a Korotkoff sound digital signal, thereby obtaining Korotkoff sound data and storing it in the storage space.

[0118] In one example, the processing unit is used to determine the time length between the acquisition time of the first pressure simulation signal and the acquisition time of the last pressure simulation signal in the airbag depressurization process as the storage time period when the storage space of the storage module 104 is larger than the preset storage space. That is, when the storage space of the storage module 104 is larger than the preset storage space, the time period between the start and end of the acquisition by the air pressure sensor 101 in the airbag depressurization process is determined as the storage time period.

[0119] Specifically, the preset storage space is the space required to store all blood pressure data and Korotkoff sound data within the first time period, and the first time period is the average time to complete the blood pressure measurement. During the blood pressure measurement process, the air pressure sensor 101 can collect multiple pressure analog signals according to the pressure sampling frequency, and the piezoelectric sensor 102 can collect multiple brachial artery pulsation signals according to the piezoelectric sampling frequency. If the storage space of the storage module 104 is greater than the preset storage space, it means that the storage space is sufficient. At this time, the processing unit can store all the data collected during the airbag decompression process during the blood pressure test in the storage space. Among them, the piezoelectric sampling frequency is the same as the pressure sampling frequency.

[0120] In another example, the processing unit is used to determine the duration between the Nth second before the start time of the Korotkoff sound data and the Mth second after the disappearance time of the Korotkoff sound data as the storage time period when the storage space of the storage module is less than or equal to the preset storage space, wherein N≥1, M≥1, N and M may be the same or different. That is, the storage time period is consistent with the duration of the above-mentioned playback data segment, and the storage time period is the above-mentioned playback time period.

[0121] For example, both N and M can be 1 s, 2 s or 3 s, etc. Taking N and M as 2 s, the storage time period is the duration between the first 2 s of the first Korotkoff sound and the last 2 s of the last Korotkoff sound.

[0122] In some optional embodiments, the control module further includes a control unit, which is used to control the display module 106 to synchronously display the pulse icon when the audio output module 105 plays the first Korotkoff sound or N seconds before the first Korotkoff sound appears, N ≥ 1 second, until the Korotkoff sound disappears or weakens. The display interface at this time can be as follows: Fig. 9 As shown. Among them, Fig. 9 The heart-shaped icon in the lower part represents the pulse icon mentioned above. Fig. 9 The numbers in the lower part indicate the current pressure, and the unit of pressure is millimeters of mercury (mmHg) or kilopascal (Kpa).

[0123] Exemplarily, the blood pressure measurement device further includes a playback button, which is connected to the control module 103. The playback button is used to generate a playback signal based on a preset action, so that the control module 103 responds to the playback operation. Specifically, a playback button can be set separately, or any existing button on the host 200 can be used as a playback button, for example, Figure 4 As shown, any one of the first volume key 201 (increase volume), the second volume key 202 (decrease volume), the control key 203 (start measurement and end measurement), the icon display key 204 and the play key 205 set on the host 200 can be used as a playback key.

[0124] The preset action that triggers the generation of the playback signal can be defined by the designer. For example, the preset action can be a long press for 3 seconds, a short press for 1 second, or a continuous press for 3 times, etc. The playback signal can be a low-level signal or a high-level signal.

[0125] Optionally, the blood pressure measurement device also includes a voice assistant, which is connected to the control module 103. When the voice assistant receives specific audio (for example, "please play back pressure and Korotkoff sounds" or "play data", etc.), the voice assistant generates a playback signal to enable the control module 103 to respond to the playback operation.

[0126] According to an embodiment of the present invention, an embodiment of a blood pressure measurement method is provided. It should be noted that the steps shown in the flowchart of the accompanying drawings can be executed in a computer system such as a set of computer executable instructions, and although a logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in an order different from that shown here.

[0127] In this embodiment, a blood pressure measurement method with Korotkoff sound recognition and playback functions is provided, which is used in the above-mentioned control module 103. The method includes:

[0128] Acquire the pressure analog signal and brachial artery pulsation signal of the air pressure drop process in the airbag;

[0129] Identify the brachial artery pulsation signal to obtain the Korotkoff sound signal;

[0130] Processing the pressure simulation signal to obtain the air pressure in the airbag during the air pressure drop process;

[0131] Processing the pressure analog signal and the Korotkoff sound signal to obtain the systolic pressure data and the diastolic pressure data;

[0132] In response to the playback operation, the process of the air pressure drop in the air bag, the process of the appearance of Korotkoff sounds until the end, and the systolic pressure data and diastolic pressure data are synchronously played back and displayed.

[0133] In this embodiment, the playback of the air pressure drop process in the airbag is played back through the digital display on the display screen, and the playback of the appearance of Korotkoff sounds until the end of the process is played back through the sound player or the beating of the heartbeat graphic symbol on the display screen, or a combination of the two.

[0134] Another embodiment provides a blood pressure measurement method, which can be used in the above-mentioned control module 103, and the control module 103 can be a controller or processor in a device such as a mobile phone, a computer or a computer. Fig.10 FIG. 1 is a flow chart of a blood pressure measurement method according to an embodiment of the present invention. Fig.10 As shown, the method comprises the following steps:

[0135] Step S1001, obtaining a pressure simulation signal and a brachial artery pulsation signal.

[0136] Among them, the pressure simulation signal is used to characterize the air pressure in the cuff, and the brachial artery pulsation signal is used to characterize the sound of blood flow in the brachial artery during blood pressure measurement.

[0137] Specifically, the control module obtains a pressure analog signal from the air pressure sensor, and the control module obtains a brachial artery pulsation signal from the piezoelectric sensor.

[0138] Step S1002: Identify the brachial artery pulsation signal to obtain a Korotkoff sound signal.

[0139] Specifically, the above step S1002 may include the following steps:

[0140] Step a1, setting a recognition threshold of Korotkoff sound signal according to a comparison result between an average value of the arterial signal intensity of the brachial artery pulsation signal within a preset time period and a preset threshold.

[0141] Specifically, the above step a1 includes the following steps:

[0142] Step a11, performing bandpass filtering on the brachial artery pulsation signal within a preset frequency range to obtain an arterial strength signal.

[0143] For example, the arterial strength signal may be Figure 5 or Figure 6 The preset frequency range is an empirical value and can be adjusted according to needs. For example, the frequency range can be [20Hz, 120Hz].

[0144] Step a12, obtaining the numerical difference between the maximum value and the minimum value of the arterial strength signal within the preset acquisition time period each time, and using the numerical difference as the arterial signal strength each time.

[0145] The preset collection time period may be an empirical value and may be adjusted according to actual needs. For example, the preset collection time period may be 1 second or 2 seconds.

[0146] Step a13, obtaining the average value of the arterial signal strength of all times to obtain the mean value of the arterial signal strength.

[0147] Step a14, setting a recognition threshold of Korotkoff sound signals according to a comparison result of the mean value of the arterial signal strength, the first preset threshold and the second preset threshold.

[0148] Specifically, when the mean value of the arterial signal strength is less than the first preset threshold, the first recognition threshold of the Korotkoff sound signal is set; when the mean value of the arterial signal strength is greater than the second preset threshold, the second recognition threshold of the Korotkoff sound signal is set to P times the mean value of the arterial signal strength. When the mean value of the arterial signal strength is between the first preset threshold and the second preset threshold, the third recognition threshold of the Korotkoff sound signal is set to 2P times the mean value of the arterial signal strength.

[0149] Wherein, P>0, the first preset threshold, the second preset threshold, the first identification threshold and P can all be empirical values ​​and can be adjusted according to actual needs. For example, the first preset threshold can be 0.005, the second preset threshold can be 0.008, the first identification threshold can be 0.015, and P can be 1.5.

[0150] Specifically, the mean value of the arterial signal strength is between the first preset threshold and the second preset threshold, which means that the mean value of the arterial signal strength is greater than or equal to the first preset threshold, and the mean value of the arterial signal strength is less than or equal to the second preset threshold.

[0151] Step a2: identifying the Korotkoff sound signal according to the identification threshold.

[0152] Specifically, the brachial artery pulsation signal corresponding to the arterial strength signal whose arterial signal strength is greater than the identification threshold is determined as a Korotkoff sound signal. The identification threshold may be a first identification threshold, a second identification threshold, or a third identification threshold. That is, the control module determines whether the strength of the arterial strength signal (i.e., the arterial signal strength) is greater than the identification threshold each time, and if the arterial signal strength is greater than the identification threshold, the arterial strength signal is determined as a Korotkoff sound signal.

[0153] Step S1003, processing the pressure simulation signal and the Korotkoff sound signal to obtain blood pressure data, the blood pressure data includes the air pressure and blood pressure value during the airbag decompression process, and the blood pressure value is the systolic pressure and the diastolic pressure.

[0154] Specifically, the control module 103 first screens the pressure analog signal based on the Korotkoff sound signal, retains the pressure analog signal corresponding to the acquisition time of the Korotkoff sound signal, and converts the Korotkoff sound signal and the pressure analog signal corresponding to the Korotkoff sound signal to obtain the air pressure data and the blood pressure value, so as to ensure that the obtained blood pressure data and the Korotkoff sound data obtained by subsequent processing correspond in time. That is, the air pressure data is obtained by converting and processing the screened pressure analog signal, and the format of the air pressure data is adapted to the format that can be recognized by the display module.

[0155] Exemplarily, the filtered pressure analog signal is input into an ADC, and the output of the ADC can be directly determined as the blood pressure data, or the blood pressure data can be determined based on the output of the ADC and the above formula (2).

[0156] Step S1004: Obtain Korotkoff sound data according to the Korotkoff sound signal.

[0157] The Korotkoff sound data is a Korotkoff sound signal after conversion, and the format of the Korotkoff sound data is adapted to a format that can be recognized by the audio output module.

[0158] Exemplarily, the Korotkoff sound signal is input into the ADC, and the output of the ADC can be directly determined as the Korotkoff sound data, or the output of the ADC after time-frequency conversion, amplification, frequency shift, frequency-time conversion and amplification can be determined as the Korotkoff sound data.

[0159] Step S1005 , in response to the playback operation, synchronous playback of Korotkoff sounds and air pressure is performed on the Korotkoff sounds data and the blood pressure data, and the systolic pressure and diastolic pressure are displayed.

[0160] The blood pressure measurement method provided in this embodiment can identify Korotkoff sounds to obtain blood pressure values ​​and play back Korotkoff sounds to determine whether the blood pressure values ​​are accurate. After obtaining the pressure simulation signal and the brachial artery pulsation signal, the Korotkoff sound signal is identified from the brachial artery pulsation signal, and then the blood pressure data is determined based on the Korotkoff sound signal and the pressure simulation signal, the Korotkoff sound data is determined based on the Korotkoff sound signal, the pressure data is obtained based on the pressure simulation signal, and the air pressure data corresponding to the appearance of Korotkoff sounds in the blood pressure data and the air pressure data corresponding to the disappearance of Korotkoff sounds are used as blood pressure measurement results. The accuracy of the determined Korotkoff sound data and the air pressure data corresponding to the Korotkoff sound data can be improved, and more accurate original measurement data can be provided for determining the blood pressure value through the playback operation, thereby improving the accuracy of blood pressure measurement. By playing back the Korotkoff sounds, Korotkoff sound sound data consistent with the manual auscultation method is provided for the user to verify the blood pressure value, and original data is provided for verifying the blood pressure value, analyzing the user's blood pressure measurement process, and then analyzing the disease.

[0161] Specifically, when the user performs a playback operation (for example, pressing a playback button with a preset action), the control module responds to the playback operation, controls the audio output module to play back the Korotkoff sound data read from the storage module, and controls the display module to play back the blood pressure data corresponding to the Korotkoff sound data read from the storage module synchronously with the air pressure and simultaneously display the blood pressure value. The Korotkoff sound played by the audio output module corresponds to the air pressure displayed by the display module.

[0162] In this embodiment, after the blood pressure measurement is performed, the Korotkoff sounds during the measurement process can be replayed at any time, and the air pressure values ​​corresponding to the Korotkoff sounds during the measurement process can be displayed and the blood pressure values ​​can be displayed, so that medical staff can view and analyze the collected data multiple times, and then more accurately determine the user's blood pressure, which helps medical staff to more accurately judge whether there are phenomena such as irregular heart beats or atrial fibrillation.

[0163] Exemplarily, in order to ensure that the played Korotkoff sounds correspond to the displayed air pressure, after the user triggers the playback operation, the blood pressure measurement method further includes steps c1 to c5:

[0164] Step c1, determining a playback data segment and a playback time period based on the pressure simulation signal and the Korotkoff sound signal.

[0165] The playback data segment includes a data segment for Korotkoff sound playback and a data segment for blood pressure playback, and the playback time period is a time period for synchronous playback of Korotkoff sound data and blood pressure data.

[0166] Specifically, the playback time period T3 is the difference between the playback end time T2 of the Korotkoff sound playback and the playback start time T1 of the Korotkoff sound playback, that is, T3=T2-T1. The playback end time T2 of the Korotkoff sound playback and the playback start time T1 of the Korotkoff sound playback are determined based on the playback data segment.

[0167] When the data segment of Korotkoff sound playback contains Korotkoff sound data from the Nth second before the start time of the Korotkoff sound data to the Mth second after the disappearance time of the Korotkoff sound data, the playback end time is the Mth second after the disappearance time of the Korotkoff sound data, and the playback start time is the Nth second before the start time of the Korotkoff sound data.

[0168] Step c2, determining the audio playback sequence number of the Korotkoff sound playback based on the playback time period and the audio playback frequency.

[0169] Specifically, the audio playback sequence number may be the product of the playback time period T3 and the audio playing frequency f2, that is, the audio playback sequence number is (T3×f2).

[0170] Step c3, determining the air pressure playback sequence number of the air pressure playback based on the playback time period and the pressure sampling frequency.

[0171] Specifically, the air pressure playback sequence number may be the product of the playback time period T3 and the pressure sampling frequency f1, that is, the air pressure playback sequence number is (T3×f1).

[0172] The audio playback sequence number and the air pressure playback sequence number establish a corresponding relationship between the Korotkoff sound data and the blood pressure data at the same time in the playback time period based on the playback time period.

[0173] Step c4, reading Korotkoff sound data from the storage module based on the audio playback sequence number.

[0174] Step c5, reading the blood pressure data corresponding to the Korotkoff sound data from the storage module based on the air pressure playback sequence number.

[0175] Specifically, the audio playback sequence number and the air pressure playback sequence number corresponding to the specific playback moment are determined based on the playback time period, and then data is read from the storage module based on the audio playback sequence number and the air pressure playback sequence number, which can ensure that the read Korotkoff sound data and pressure data are corresponding.

[0176] Exemplarily, after the control module receives the playback signal, the process of playing Korotkoff sounds and displaying blood pressure can be as follows: Fig.11 As shown, first, the control module determines the playback start time T1 and the playback end time T2 of the Korotkoff sound playback, and then determines the playback time period T3 based on T1 and T2.

[0177] Afterwards, the audio playback sequence number of the Korotkoff sound playback is determined based on the playback time period and the audio playback frequency, and the air pressure playback sequence number of the air pressure playback is determined based on the playback time period and the pressure sampling frequency, and then the Korotkoff sound data is read from the storage module based on the audio playback sequence number, and the air pressure data corresponding to the Korotkoff sound data is read from the storage module based on the air pressure playback sequence number, and then the audio output module is controlled to play the Korotkoff sound based on the read Korotkoff sound data, and the display module is controlled to display the air pressure based on the read air pressure data, and when the Korotkoff sound appears, the corresponding air pressure is identified as the systolic pressure for display, and when the Korotkoff sound disappears, the corresponding air pressure is identified as the diastolic pressure for display. Among them, the audio playback sequence number and the air pressure playback sequence number establish a corresponding relationship between the Korotkoff sound data and the blood pressure data at the same time in the playback time period based on the playback time period.

[0178] In this embodiment, a blood pressure measurement method is provided, which can be used in the above-mentioned control module 103. Fig.12 FIG. 1 is a flow chart of another blood pressure measurement method according to an embodiment of the present invention. Fig.12 As shown, the method comprises the following steps:

[0179] Step S1201, acquiring a pressure simulation signal and a brachial artery pulsation signal.

[0180] For details, please see Fig.10Step S1001 of the illustrated embodiment will not be described in detail here.

[0181] Step S1202: Identify the brachial artery pulsation signal to obtain a Korotkoff sound signal.

[0182] For details, please see Fig.10 Step S1002 of the illustrated embodiment will not be described in detail here.

[0183] Step S1203, processing the pressure analog signal and the Korotkoff sound signal to obtain blood pressure data, the blood pressure data including the air pressure and blood pressure value during the airbag decompression process.

[0184] For details, please see Fig.10 Step S1003 of the illustrated embodiment will not be described in detail here.

[0185] Step S1204: Obtain Korotkoff sound data according to the Korotkoff sound signal.

[0186] Specifically, the above step S1204 includes:

[0187] Step S12041, converting the Korotkoff sound signal into a Korotkoff sound digital signal.

[0188] Specifically, the brachial artery pulsation signal can be converted into a Korotkoff sound digital signal through an ADC chip or an ADC interface of an MCU.

[0189] It should be understood that the pressure analog signal can also be converted into a pressure digital signal through an ADC chip or an ADC interface of an MCU.

[0190] Step S12042: Perform time-frequency transformation on the Korotkoff sound digital signal to obtain a first frequency domain feature.

[0191] Specifically, FFT is performed on the Korotkoff sound digital signal to convert the Korotkoff digital signal into a first frequency domain feature.

[0192] Step S12043, amplify the first frequency domain feature to obtain a second frequency domain feature.

[0193] Specifically, the first frequency domain feature may be amplified by an operational amplifier to obtain the second frequency domain feature. The amplification factor is greater than or equal to 10, for example, the amplification factor may be 10, 20, 50, 80 or 100.

[0194] Step S12044: Shift the second frequency domain feature as a whole upward by a preset frequency to obtain a third frequency domain feature.

[0195] Step S12045: Perform frequency-time transformation on the third frequency domain feature to obtain the first time domain feature.

[0196] Specifically, IFFT is performed on the third frequency domain feature to convert the third frequency domain feature into the first time domain feature.

[0197] Step S12046: amplify the first time domain feature to obtain Korotkoff sound data.

[0198] Specifically, the first time domain feature can be amplified by the above formula (1) to obtain Korotkoff sound data.

[0199] Further, in some optional implementations, after step S12041 and before step S12042, the blood pressure measurement method further includes: performing denoising processing on the Korotkoff sound digital signal to obtain a denoised Korotkoff sound digital signal. In this case, step S12042 specifically includes: performing time-frequency transformation processing on the denoised Korotkoff sound digital signal to obtain a first frequency domain feature.

[0200] Specifically, the Korotkoff sound digital signal can be denoised by using a notch filter to filter out interference of the 50 Hz power frequency in the Korotkoff sound digital signal, thereby improving the accuracy of the Korotkoff sound data obtained based on the Korotkoff sound digital signal.

[0201] Step S1205, storing the blood pressure data and Korotkoff sound data in a storage module.

[0202] Step S1206, in response to the playback operation, synchronous playback of Korotkoff sound data and blood pressure data is performed, and the blood pressure data includes air pressure and blood pressure values ​​during the airbag decompression process.

[0203] Please refer to step b2 of the above embodiment for details, which will not be repeated here.

[0204] In some optional implementations, after determining the Korotkoff sound data and the air pressure data and before performing the playback operation, the blood pressure measurement method further includes: determining the blood pressure measurement result based on the air pressure data and the Korotkoff sound data, and controlling the display module to display the blood pressure measurement result.

[0205] Among them, the blood pressure measurement result includes a low-pressure signal and a high-pressure signal to achieve the measurement of high blood pressure and low blood pressure. The high-pressure signal refers to the blood pressure value corresponding to the first Korotkoff sound during the blood pressure measurement process, that is, the systolic pressure, and the low-pressure signal refers to the blood pressure value corresponding to the disappearance or change of the Korotkoff sound during the blood pressure measurement process, that is, the diastolic pressure. Therefore, the blood pressure data of this embodiment includes the blood pressure value as the blood pressure measurement result and the air pressure during the airbag decompression process, and the synchronous playback of Korotkoff sounds and blood pressure data includes the synchronous playback of Korotkoff sounds, the air pressure during the airbag decompression process, and the simultaneous display of blood pressure values.

[0206] The blood pressure measurement method provided in this embodiment, after converting the Korotkoff sound signal into a Korotkoff sound digital signal, performs time-frequency transformation, amplification, frequency shifting, frequency-time transformation and amplification processing on the Korotkoff sound digital signal, which can improve the problem of poor response of the audio output module due to the fact that the sound frequency of the Korotkoff sound contains more low-frequency components, and enhance the playback effect of the audio output module.

[0207] In this embodiment, a blood pressure measurement method is provided, which can be used in the above-mentioned control module 103. Fig.13 FIG. 1 is a flow chart of another blood pressure measurement method according to an embodiment of the present invention. Fig.13 As shown, the method comprises the following steps:

[0208] Step S1301, obtaining a pressure simulation signal and a brachial artery pulsation signal.

[0209] For details, please see Fig.10 Step S1001 of the illustrated embodiment will not be described in detail here.

[0210] Step S1302: determining a storage time period based on the storage space of the storage module.

[0211] In some embodiments, when the storage space of the storage module is larger than the preset storage space, the time between the acquisition time of the first pressure simulation signal and the acquisition time of the last pressure simulation signal in the airbag depressurization process is determined as the storage time period. That is, when the storage space of the storage module is larger than the preset storage space, the time period between the start and end of the acquisition of the air pressure sensor 101 is determined as the storage time period.

[0212] Specifically, the preset storage space is the space required to store all blood pressure data and Korotkoff sound data within a first time period, and the first time period is the average time duration to complete the blood pressure measurement.

[0213] In this implementation, all measurement data can be stored to ensure data integrity and avoid data omission.

[0214] In other embodiments, when the storage space of the storage module is less than or equal to the preset storage space, the duration between the Nth second before the start time of the Korotkoff sound data and the Mth second after the disappearance time of the Korotkoff sound data is determined as the storage time period, wherein N≥1, M≥1, and N and M may be the same or different. That is, the storage time period is consistent with the duration of the above-mentioned playback data segment, and the storage time period is the above-mentioned playback time period.

[0215] For example, both N and M can be 1 s, 2 s or 3 s, etc. Taking N and M as 2 s, the storage time period is the duration between the first 2 s of the first Korotkoff sound and the last 2 s of the last Korotkoff sound.

[0216] In this embodiment, only the measurement data between the first moment and the second moment may be stored, thereby reducing the amount of data and saving storage space.

[0217] Step S1303: Identify the brachial artery pulsation signal within the storage time period to obtain a Korotkoff sound signal.

[0218] For details, please see Fig.10 Step S1002 of the illustrated embodiment will not be described in detail here.

[0219] Step S1304, processing the pressure analog signal and Korotkoff sound signal within the storage time period to obtain the blood pressure data within the storage time period.

[0220] For details, please see Fig.10 Step S1003 of the illustrated embodiment will not be described in detail here.

[0221] Step S1305: Obtain Korotkoff sound data according to the Korotkoff sound signal.

[0222] For details, please see Fig.12 Step S1204 of the illustrated embodiment will not be described in detail here.

[0223] Step S1306, storing the blood pressure data and Korotkoff sound data within the storage time period into the storage module.

[0224] Step S1307, in response to the playback operation, synchronous playback of the Korotkoff sounds and the air pressure during the airbag decompression process is performed on the Korotkoff sounds and the blood pressure data, and the blood pressure value is displayed simultaneously.

[0225] Please refer to step b2 of the above embodiment for details, which will not be repeated here.

[0226] Step S1308: When the audio output module plays the first Korotkoff sound, the display module is controlled to synchronously display the pulse icon.

[0227] For example, the display interface including the pulse icon may be as follows: Fig. 9 shown.

[0228] The blood pressure measurement method provided in this embodiment determines the storage time period before processing the pressure simulation signal and the brachial artery pulsation signal, and can flexibly adjust the length of the stored data to avoid the situation where no data is stored. When the audio output module plays the first Korotkoff sound or S seconds before the first Korotkoff sound appears, S ≥ 1 second, the control display module synchronously displays the pulse icon, which can more accurately assist medical staff in determining the actual blood pressure of the user.

[0229] In this embodiment, a control module is also provided, which is used to implement the above-mentioned embodiments and preferred implementation modes, and the descriptions that have been made will not be repeated. As used below, the term "module" can implement a combination of software and / or hardware of a predetermined function. Although the devices described in the following embodiments are preferably implemented in software, the implementation of hardware, or a combination of software and hardware, is also possible and conceivable.

[0230] The control module in this embodiment is presented in the form of a functional unit, where the unit refers to an application specific integrated circuit (ASIC), a processor and memory that executes one or more software or fixed programs, and / or other devices that can provide the above functions.

[0231] An embodiment of the present invention further provides an electronic device, wherein the host 200 mentioned above may be an electronic device.

[0232] like Fig.14 As shown, the electronic device includes: one or more processors 310, a memory 320, and a communication interface 330 for connecting various components, and the communication interface 330 includes a high-speed interface and a low-speed interface. The various components are connected to each other using different buses for communication, and can be installed on a common mainboard or installed in other ways as needed. The processor can process instructions executed in the electronic device, including instructions stored in or on the memory to display graphical information of the GUI on an external input / output device (such as a display device coupled to the interface). In some optional embodiments, if necessary, multiple processors and / or multiple buses can be used together with multiple memories and multiple memories. Similarly, multiple electronic devices can be connected, and each device provides some necessary operations (for example, as a server array, a group of blade servers, or a multi-processor system). Fig.14 A processor 310 is taken as an example. The processor 310 is equivalent to the control module 103 mentioned above, and the memory 320 is equivalent to the storage module 104 mentioned above.

[0233] In the description of this specification, the description with reference to the terms "this embodiment", "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

[0234] Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the present invention.

Claims

1. A blood pressure measuring device with Korotkoff sound recognition and playback function, characterized in that: The blood pressure measurement device includes a control module, an air pressure sensor and a vibration sensor; The air pressure sensor is used to collect a pressure analog signal, and the pressure analog signal is used to represent the air pressure in the airbag; The vibration sensor is fixed in the cuff and is used to collect the brachial artery pulsation signal; The control module is used to control the air pressure in the airbag and identify the Korotkoff sounds in the brachial artery pulsation signal collected by the vibration sensor, and obtain systolic pressure data and diastolic pressure data based on the Korotkoff sounds and the air pressure in the airbag; and the control module is also used to respond to a playback operation to playback and display the process of the air pressure dropping in the airbag, the appearance of Korotkoff sounds until the end, and the systolic pressure data and the diastolic pressure data.

2. The blood pressure measuring device according to claim 1, characterized in that: The vibration sensor is a piezoelectric sensor or a microphone.

3. The blood pressure measuring device according to claim 1, characterized in that: The playback of the air pressure drop process in the airbag is displayed digitally, and the playback of the Korotkoff sounds from the appearance to the end of the process is played back through a sound player and / or through the beating of a heartbeat graphic symbol on a display screen.

4. The blood pressure measuring device according to any one of claims 1 to 3, characterized in that: The control module is also used to send the Korotkoff sounds, the air pressure in the airbag, the systolic pressure data, the diastolic pressure data, and the corresponding measurement time as associated blood pressure measurement data to an external device for storage and playback.

5. The blood pressure measuring device according to claim 4, characterized in that: The playback operation includes selecting the blood pressure measurement data to be played back for playback.

6. A blood pressure measuring device, characterized in that: The blood pressure measuring device comprises an air pressure sensor, a piezoelectric sensor and a control module; The air pressure sensor is used to collect a pressure analog signal, and the pressure analog signal is used to represent the air pressure in the airbag; The piezoelectric sensor is fixed in the cuff and is used to collect the brachial artery pulsation signal; The control module is used to obtain the pressure simulation signal and the brachial artery pulsation signal, identify the brachial artery pulsation signal to obtain a Korotkoff sound signal, and obtain Korotkoff sound data according to the Korotkoff sound signal. The control module is also used to process the pressure simulation signal and the Korotkoff sound signal to obtain blood pressure data, the blood pressure data includes air pressure and blood pressure values ​​during the airbag decompression process, and the blood pressure values ​​are systolic pressure and diastolic pressure, and The control module is also used for synchronously replaying Korotkoff sounds and air pressure and displaying the systolic pressure and the diastolic pressure in response to a playback operation; Wherein, the air pressure sensor and the piezoelectric sensor are respectively connected to the control module for communication.

7. The blood pressure measuring device according to claim 6, characterized in that: The blood pressure measurement device also includes a storage module, an audio output module and a display module; The control module is also used to store the Korotkoff sound data and the blood pressure data in the storage module, so as to control the audio output module to perform Korotkoff sound playback on the Korotkoff sound data read from the storage module, and to control the display module to perform air pressure playback and blood pressure value display on the blood pressure data corresponding to the Korotkoff sound data read from the storage module; wherein the storage module, the audio output module and the display module are respectively communicatively connected to the control module.

8. The blood pressure measuring device according to claim 7, characterized in that: The control module is used to determine a playback data segment and a playback time period based on the pressure simulation signal and the Korotkoff sound signal; wherein the playback data segment includes a data segment for Korotkoff sound playback and a data segment for air pressure playback, and the playback time period is a time period for synchronous playback of the Korotkoff sound data and the blood pressure data.

9. The blood pressure measuring device according to claim 7, characterized in that: The control module is used to determine the audio playback sequence number of the Korotkoff sound playback based on the playback time period and the audio playing frequency of the Korotkoff sound, and to determine the air pressure playback sequence number of the air pressure playback based on the playback time period and the pressure sampling frequency of the air pressure.

10. A blood pressure measurement method with Korotkoff sound recognition and playback function, characterized in that: The method comprises: Acquire the pressure analog signal and brachial artery pulsation signal of the air pressure drop process in the airbag; Identifying the brachial artery pulsation signal to obtain a Korotkoff sound signal; Processing the pressure simulation signal to obtain the air pressure in the airbag during the air pressure drop process; Processing the pressure simulation signal and the Korotkoff sound signal to obtain systolic pressure data and diastolic pressure data; In response to the playback operation, the process of the air pressure drop in the air bag, the process of the appearance of Korotkoff sounds until the end, and the systolic pressure data and the diastolic pressure data are synchronously played back.

11. A blood pressure measurement method, characterized in that: The method comprises: Acquire pressure analog signal and brachial artery pulsation signal; Identifying the brachial artery pulsation signal to obtain a Korotkoff sound signal, and obtaining Korotkoff sound data according to the Korotkoff sound signal; Processing the pressure simulation signal and the Korotkoff sound signal to obtain blood pressure data, wherein the blood pressure data includes the air pressure during the airbag decompression process and the blood pressure value, wherein the blood pressure value is the systolic pressure and the diastolic pressure; In response to the playback operation, the Korotkoff sound data and the blood pressure data are synchronously played back with Korotkoff sounds and air pressure, and the systolic pressure and the diastolic pressure are displayed.

12. An electronic device, characterized in that: include: A memory and a processor, wherein the memory and the processor are communicatively connected to each other, the memory stores computer instructions, and the processor executes the method of claim 10 or 11 by executing the computer instructions.

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