CN117379096A - Superficial arterial flow velocity and fluctuation monitoring flexible array sensing device, signal acquisition method and system - Google Patents

Abstract

A superficial artery flow velocity and fluctuation monitoring flexible array sensing device, a signal acquisition method and a system relate to flexible sensors in the field of biomedical science. Aiming at the technical problem that the current technology does not provide a technology capable of effectively monitoring the flow velocity in the superficial layer such as carotid artery, the invention provides the technical proposal that: the superficial artery flow velocity and fluctuation monitoring flexible array sensing device comprises: a flexible backing layer, a flexible matching layer attached to the flexible backing layer; a Doppler ultrasound detection array and a B-mode ultrasound detection array disposed between the flexible matching layer and the flexible backing layer; and a triboelectric detection module adjacent to the flexible matching layer. The flexible piezoresistive backing layer can increase the bandwidth of the detection part of the flexible ultrasonic device and detect the bending angle of the sensor; the method is suitable for the work of monitoring the flow velocity in the superficial layer such as carotid artery in real time, and is also suitable for real-time assessment of CPR success rate and guiding the adjustment of an automatic external compression instrument.

Description

Superficial arterial flow velocity and fluctuation monitoring flexible array sensing device and signal acquisition Methods and systems

Technical field

It involves the field of biomedicine, specifically flexible array sensors and related acquisition and analysis systems.

Background technique

With the development of the biomedical field, flexible array devices have increasingly become the focus of research and development due to their light weight, easy integration, and ability to fit on a variety of complex curved surfaces.

Currently, common measurement principles for monitoring superficial arterial flow velocity can be divided into invasive and non-invasive. Among them, the invasive method includes two floating catheter methods (i.e., the ordinary catheter method and the Swan-Ganz catheter method). By measuring the temperature rise effect of blood flowing from the right ventricle into the pulmonary artery, the thermistor senses and then calculates the cardiac blood flow output, and measures The results are relatively accurate, but its shortcomings are also relatively obvious. For example, invasive operations are prone to infection and are not convenient for long-term observation, and the test is affected by operator errors, and the invasive parts embedded in the human body also affect blood circulation to a certain extent. In addition, non-invasive blood flow velocity measurement includes surface-mounted electrodes, electrocardiogram, impedance blood flow mapping and Doppler ultrasound technology. Among them, in the electrocardiographic impedance test with surface-mounted electrodes, subjects are often required to wear electrodes in different positions, so the displacement of the human body may have a certain negative impact on the test results.

Currently, the common measurement principles for monitoring superficial arterial fluctuations can be divided into piezoresistive and triboelectric methods. Piezoresistive curvature strain sensors are widely used. When the system uses resistivity and strain sensors to track and collect superficial arteries, it uses a standard microcomputer to receive electrical signals for external power supply and calculation. The cost is relatively low and convenient. Mass production. The detection principle of triboelectric monitoring of superficial arterial fluctuations is the positive piezoelectric effect. When the sensitive material is deformed by the alternating action of arterial fluctuations in a certain direction, a polarization effect will occur internally, and positive and negative phenomena will appear on both sides of the surface. The opposite charge returns to its zero position when the external force is removed. Although the sensitivity of using any of the above monitoring methods alone is high, it is difficult to demodulate physiological signals and limb movement signals, resulting in inaccurate decoupling of the required physiological signals.

In real life, blood flow rate often provides a lot of guidance. For example, when blood becomes thicker, its flow speed will become slower, and fat will deposit on the inner wall of blood vessels, causing the lumen to become narrow and insufficient blood supply. If severe coronary artery disease occurs, it will cause severe cardiac ischemia or even myocardial infarction. For example, the narrowing of intracranial blood vessels has become one of the important causes of cerebral infarction. The subjects' vascular blood flow rates were different during exercise and rest. Testing the arterial blood flow velocity and understanding its changing rules, so as to grasp its normal value range and common abnormal analysis, will help us study the relationship between the health status of human organs and arterial blood flow velocity, and analyze various The prevention and treatment of cardiovascular disease plays an important guiding role. In addition, during emergency medical rescue such as cardiac arrest, hypoxic damage to brain tissue is one of the more common and important causes of brain death in the prognosis of CPR. The arterial blood supply to the brain tissue is completed by four large arteries, namely the internal carotid artery system and the vertebral-basal artery system, of which the first 3/5 of the cerebral hemisphere is supplied by the internal carotid artery system. Whether blood perfusion to the brain can be effectively restored within a short period of time after cardiac arrest is one of the gold standards that provides critical assessment and prediction for successful first aid for patients. Therefore, under such working conditions, real-time monitoring of the flow velocity in superficial layers such as the carotid artery can provide real-time assessment of the CPR success rate, and provide guidance for the automatic cardiopulmonary resuscitation instrument to provide real-time pressure and rhythm changes.

However, the existing technology has not yet provided a flexible wearable arrayed sensor that can effectively monitor the flow velocity and fluctuations in superficial layers such as carotid arteries in real time.

Contents of the invention

In view of the technical problem existing in the prior art that a device that can effectively monitor the flow velocity in superficial layers such as carotid arteries in real time has not yet been provided. The technical solution provided by the present invention can realize the monitoring of flow velocity and fluctuations in superficial layers of arteries. Specifically, The technical solution is:

A flexible array sensing device for monitoring superficial arterial flow velocity and fluctuations, characterized in that the device includes:

A flexible backing layer with piezoresistive detection capability, and a flexible matching layer that closely fits the flexible backing layer;

An inverse piezoelectric effect detection unit provided between the flexible matching layer and the flexible backing layer, the inverse piezoelectric effect detection unit being a Doppler type ultrasonic detection array and a B-type ultrasonic detection array;

A triboelectric detection module that is closely adhered to the flexible backing layer and closely adjacent to the flexible matching layer.

Furthermore, a preferred embodiment is provided, in which the Doppler-type ultrasonic detection array is disposed between the B-type ultrasonic detection array and the triboelectric detection module.

Furthermore, a preferred embodiment is provided. In the Doppler ultrasonic detection array, there are Doppler ultrasonic detection units with different inclination angles from other Doppler ultrasonic detection units.

Furthermore, a preferred embodiment is provided, in which the triboelectric detection module is a triboelectric sensing unit.

Furthermore, a preferred embodiment is provided, in which the triboelectric sensing unit includes a sensitive material layer and a conductive material layer that are in close contact with each other.

Based on the same inventive concept, the present invention also provides a method for collecting superficial arterial flow velocity and fluctuation monitoring signals. The method includes:

The steps of collecting the signal to be measured under a unified clock signal;

The step of processing the noise and crosstalk of the signal to be measured according to a preset noise reduction method;

The step of extracting a preset signal from the signal to be measured.

Furthermore, a preferred embodiment is provided, in which the signal to be measured includes artery diameter fluctuations in B mode and blood flow velocity information in Doppler mode.

Based on the same inventive concept, the present invention also provides a superficial arterial flow velocity and fluctuation monitoring signal acquisition system. The system includes:

A module that collects the signal to be tested under a unified clock signal;

A module that processes the noise and crosstalk of the signal to be measured according to the preset noise reduction method;

A module for extracting the preset signal from the signal to be measured.

Based on the same inventive concept, the present invention also provides a computer storage medium for storing a computer program. When the computer program is read by a computer, the computer executes the method.

Based on the same inventive concept, the present invention also provides a computer, including a processor and a storage medium. When the processor reads the computer program stored in the storage medium, the computer executes the method.

Compared with the existing technology, the technical solution provided by the present invention has the following benefits:

Highly integrated system: The system contains multiple key subsystems, including power supply, acquisition, transmission, preprocessing and signal processing. These subsystems are tightly integrated to ensure efficient data flow and signal processing.

Stable power supply system: The main power supply system includes AC/DC mains conversion and voltage stabilization systems, which ensures a stable power supply for the system and provides a standard reference voltage value, which helps improve the accuracy and reliability of collection.

Signal processing and enhancement: The system performs necessary signal amplification, digital-to-analog conversion and filtering processing at the front end, which helps to improve signal quality and reduce noise interference.

Distributed high-speed acquisition: The core control unit performs distributed high-speed acquisition under a unified clock, ensuring accurate and synchronous acquisition of data collected from multiple channels, which is very important for timing-related signal analysis.

Adaptive noise reduction: The mid-range pre-processing unit has a hardware-based adaptive noise reduction system, which can handle noise and crosstalk. In particular, it can clearly filter out body movement signals (large interference signals) and provide clearer physiological signal results. Provides better basic support for subsequent signal recognition.

Multi-mode signal analysis: The system can process signals in different modes, including artery diameter fluctuations in B mode and blood flow velocity information in Doppler mode. This multimodal analysis facilitates comprehensive assessment of physiological signals.

Personalized signal processing: The system can perform specific and differentiated analysis based on the blood viscosity of different groups of people and the material properties of the blood vessel wall, which means that the system can obtain the closest physiological signal detection value as possible.

Accurate physiological signal results: Through methods such as multi-piezoelectric ceramic tilt angle array Doppler flow velocity ultrasound calculation and other methods, the system can provide relatively accurate physiological signal results, which is very valuable for subsequent medical diagnosis and analysis research.

In general, the advantages of the technical solution provided by the present invention lie in its high degree of integration, stability, signal processing capabilities and multi-mode signal analysis capabilities. These characteristics make it widely used in medical diagnosis, biomedical research and other fields. prospect. At the same time, personalized signal processing also makes it more suitable for different individuals and application scenarios.

It is suitable for use in flexible array sensors for real-time monitoring of flow velocity in superficial layers such as carotid arteries.

Description of the drawings

Figure 1 is a schematic diagram of the basic composition and working principle of a flexible arrayed sensing device for monitoring superficial arterial flow velocity and fluctuations provided in the first embodiment;

Figure 2 is a schematic diagram of the triboelectric sensing unit mentioned in the fifth embodiment;

Figure 3 is a system schematic diagram of the superficial arterial flow velocity and fluctuation monitoring signal acquisition system mentioned in the seventh embodiment;

Figure 4 is a schematic diagram of the technical route of the superficial arterial flow velocity and fluctuation monitoring signal acquisition system mentioned in the seventh embodiment;

Figure 5 is a schematic diagram of the results of the flow velocity fluctuation chart mentioned in the seventh embodiment;

Figure 6 is a schematic diagram of the principle of real-time evaluation and feedback of compression by the superficial arterial flow velocity and fluctuation monitoring signal acquisition system mentioned in the seventh embodiment.

Detailed ways

In order to make the advantages and benefits of the technical solutions provided by the present invention more clear, the technical solutions provided by the present invention are now described in further detail with reference to the accompanying drawings, specifically:

Embodiment 1. This embodiment will be described with reference to Figure 1. This embodiment provides a flexible array sensing device for monitoring superficial artery flow velocity and fluctuations. The device includes:

A flexible backing layer with piezoresistive detection capability, and a flexible matching layer that closely fits the flexible backing layer;

An inverse piezoelectric effect detection unit provided between the flexible matching layer and the flexible backing layer, the inverse piezoelectric effect detection unit being a Doppler type ultrasonic detection array and a B-type ultrasonic detection array;

A triboelectric detection module that is closely adhered to the flexible backing layer and closely adjacent to the flexible matching layer.

The flexible backing layer in the triboelectric detection unit is also called a flexible packaging material. It can not only increase the bandwidth of the detection part of the flexible ultrasonic device, but also detect the angle at which the sensor is bent, which can increase the controllability of the sound field and contribute to arterial fluctuations. detection;

specific,

This embodiment describes a flexible arrayed sensor for monitoring superficial arterial flow velocity and fluctuations, and its structural schematic diagram is shown in Figure 1. It includes two common inverse piezoelectric effect measurement modes, which are B-mode ultrasound and Doppler ultrasound (D-mode ultrasound). In addition, this arrayed sensor also includes a triboelectric (TENG) detection part with positive piezoelectric effect and a flexible backing layer with piezoresistive detection capability.

B-mode ultrasound, as the most common working mode of ultrasound equipment, is also used in this embodiment. The array device working in this mode is located on one side of the entire flexible sensing system, and it can observe diameter fluctuations. Because of its area array design, it has the capability of phased imaging. And when covered on human skin, it is not easily affected by slight displacement of the sensor because the acquisition system can automatically focus on the artery area of interest.

When Doppler ultrasound (D-mode ultrasound) uses Doppler technology to detect blood flow velocity, the detection value is affected by factors such as the sound wave beam, propagation angle, and blood vessel inclination, which may cause inaccurate results. The Doppler ultrasound array device shown in this patent adopts a series of different incident tilt angles (including but not limited to the two sets of tilt angles shown in the figure), and uses the simultaneous emission and simultaneous reception pulse Doppler working mode to detect blood Flow rate for stable and accurate imaging. In the same way, due to the rich and densely arranged design of sensor array elements, the problem of limited focus area is largely avoided.

Embodiment 2. This embodiment is a further limitation of the flexible arrayed sensing device for monitoring superficial arterial flow velocity and fluctuations provided in Embodiment 1. The Doppler-type ultrasonic detection array is disposed between the B-type ultrasonic detection array and between the triboelectric detection modules.

Embodiment 3. This embodiment is a further limitation of the flexible arrayed sensing device for monitoring superficial arterial flow velocity and fluctuation provided in Embodiment 1. In the Doppler-type ultrasonic detection array, there are differences with other Doppler-type ultrasonic detection arrays. Doppler ultrasonic detection units with different inclination angles.

Embodiment 4. This embodiment is a further limitation of the flexible arrayed sensing device for monitoring superficial arterial flow velocity and fluctuation provided in Embodiment 1. The triboelectric detection module is a triboelectric sensing unit.

Embodiment 5: This embodiment will be described with reference to Figure 2. This embodiment is a further limitation of the flexible arrayed sensing device for monitoring superficial arterial flow velocity and fluctuations provided in Embodiment 1. The triboelectric sensing unit includes a close-fitting Combined sensitive material layer and conductive material layer.

specific,

As an important means of measuring vibration by the positive piezoelectric effect, the triboelectric sensing unit is also integrated into the array system described in this embodiment. Its specific components are shown in Figure 2. The blue part in the figure is the sensitive material PVDF or other organic polymers with good piezoelectric properties, which have the function of generating charges when subjected to vibration. The charge generated is exported through the conductive material shown in yellow and orange in the picture, and is detected and analyzed in real time. At the same time, the upper part is covered with a flexible piezoresistive sensitive material encapsulation layer (transparent color frame in the picture). The measurement of this part can relatively effectively reflect the changing pattern of sensor vibration caused by arterial fluctuations.

In addition, the backing layer (or encapsulation layer) with piezoresistive detection capability shown in Figure 1 can sense the angle at which the sensing array itself is bent and the tensile changes it undergoes. This piezoresistive sensing unit can also be used to detect changes in the curvature of the device itself attached to the human body's skin, helping to control the sound field in the ultrasonic sensing part.

Embodiment 6. This embodiment provides a method for collecting superficial arterial flow velocity and fluctuation monitoring signals. The method includes:

The steps of collecting the signal to be measured under a unified clock signal;

The step of processing the noise and crosstalk of the signal to be measured according to a preset noise reduction method;

The step of extracting a preset signal from the signal to be measured.

specific,

Step 1: Collect the signal to be tested under a unified clock signal;

Step 2: Process the signal noise, channel crosstalk and sensor displacement interference of the signal to be measured according to the adaptive noise reduction method (including but not limited to adaptive wavelet transform);

Step 3: Use categorical differential analysis when monitoring superficial artery fluctuation information under B-mode ultrasound based on the blood viscosity of different groups of people and the material properties of the blood vessel wall;

Among them, the following devices are used to monitor the skin undulations caused by arteries: triboelectric detection part and flexible piezoresistive backing layer detection part. Used in arterial diameter fluctuation monitoring: B-mode ultrasonic sensing part. Used in arterial flow velocity monitoring: Doppler mode ultrasound sensing part.

Step 4: Extract the preset signal from the signal to be measured and analyze the arterial fluctuation and flow velocity uniformly under the three sets of data sources.

Embodiment 7. This embodiment is a further limitation of the superficial artery flow velocity and fluctuation monitoring signal collection method provided in Embodiment 6. The signal to be measured includes the fluctuation of artery diameter in B mode and the blood flow velocity in Doppler mode. information, and use the distribution values of blood vessel hardness and blood viscosity in different categories of people to conduct a unified analysis of the flow rate of blood flow in superficial arteries and arterial fluctuations. The flow rate of arteries and arterial fluctuations can be verified through mutual verification of the two. Fluctuations are represented.

Embodiment 8: This embodiment will be described with reference to Figures 3-6. This embodiment provides a superficial artery flow velocity and fluctuation monitoring signal acquisition system. The system includes:

A module that collects the signal to be tested under a unified clock signal;

A module that processes the noise and crosstalk of the signal to be measured according to the preset noise reduction method;

A module for extracting the preset signal from the signal to be measured.

specific,

The system provided by this implementation includes:

Modules of AC/DC mains conversion system and voltage stabilization system, front-end core control unit, back-end signal processing system, interactive interface and warning system, and peripheral control and storage unit.

The signal acquisition and analysis system described in this implementation mode is shown in Figure 3, which includes the following key subsystems: Main power supply system: It mainly consists of an AC/DC mains conversion system and a voltage stabilizing system. The stabilized power supply serves as The system power supply and standard reference voltage value are input to the arrayed sensor acquisition system. At the same time, it assists in using some necessary signals to perform necessary amplification, digital-to-analog conversion and filtering processing of the multi-channel collected signals. The front-end core control unit mainly shares the following functions: distributed high-speed acquisition of the acquisition and transmission system under a unified clock. The mid-end pre-processing unit, as a hardware-based adaptive noise reduction system, processes noise and crosstalk to provide basic support for the next step of signal recognition. The back-end signal processing system mainly distinguishes between artery diameter fluctuations in B mode and blood flow velocity information in Doppler mode, performs characteristic calculations on these two signals, and proposes information that can be read. According to the blood viscosity of different groups of people and the material properties of the blood vessel wall, the relevant flow velocity information and flow velocity fluctuation rhythm can be initially obtained from the diameter fluctuations, and assisted by the calculation of multi-angle arrayed Doppler ultrasound. information data to obtain more accurate physiological signal results.

The cross-correlation between the two types of blood vessel diameter change information and blood flow velocity information described in this embodiment is used for the final output result. At the same time, after the integration of the interactive interface control system, basic operations can be performed on these data, such as date encoding and creating or deleting. Warning part: When the flexible arrayed sensor is changed and different from the standard value, the voltage signal output by the sensor is collected into the amplification module. It can be set by writing a program. When the set value is exceeded, the speaker will start to alarm. At the same time, it is supplemented by necessary peripheral control equipment and storage units to perform basic analysis, control and storage of physiological signals for subsequent detailed analysis with the help of doctors.

Figure 4 is the technology roadmap of the sensor acquisition and analysis system.

This implementation also provides two specific examples:

This embodiment uses a flexible sensing system composed of multiple acquisition modes to collect and analyze superficial artery flow velocity and fluctuations. Use B/D type ultrasound to calibrate the physiological parameters of the same target, and obtain the flow rate and its fluctuation pattern efficiently and stably.

Embodiment 1: Using peripheral pulse waves to differentiate and establish connections with cardiovascular diseases. Pulse wave velocity (PWV) is an important parameter reflecting the elastic modulus (or degree of hardening) of blood vessels and an important indicator reflecting the occurrence and development of atherosclerosis. The clinically common PWV can be composed of two parts: brachial-ankle pulse wave (BA-PWV) and carotid-femoral pulse wave (CF-PWV). The two parts are measured using the two-point time difference method; described in this embodiment. The flexible wearable array is easy to fit to the corresponding areas of the human body, and the delivery time relationship is monitored in real time to reflect changes in cardiovascular and cerebrovascular elasticity indicators. Figure 5 shows the monitoring results of this flexible sensing system attached to the human radial artery. The peak of the pulse wave can be clearly observed in the figure, which in a physiological sense corresponds to the peak of the diastolic phase of the cardiac cycle. The height of the dicrotic wave physiologically indicates the elasticity of the arteries and the closing speed of the aortic valve. If the dicrostic wave peak is higher, it means that the elasticity of the arteries is better, and the closing function of the aortic valve is normal; if the height of the dicrotic wave is lower, it means that the elasticity of the arteries is worse, and the closing function of the aortic valve is abnormal, and there are Arteriosclerotic tendencies.

Embodiment 2: As shown in Figure 6, the CPR success rate is evaluated in real time. Carotid artery ultrasound can provide real-time response and can effectively differentiate between low cardiac output and no ejection, and it is crucial to measure carotid artery blood flow velocity and flow during CRP. The application of this implementation method in this scenario is mainly divided into two types: (1) Provide prediction of successful rescue: after every 5 compression cycles, the flexible sensor array evaluates whether the patient has restored spontaneous circulation. If return of spontaneous circulation (ROSC) is achieved and stable, a notification is sent and the physician can discontinue CPR. Otherwise, the doctor can continue compressions. (2) This sensor can be combined with an automatic cardiopulmonary resuscitation instrument and provide real-time variable automatic compression rhythm and compression pressure adjustment.

Embodiment 9. This embodiment provides a computer storage medium for storing a computer program. When the computer program is read by a computer, the computer executes the method provided in any one of Embodiments 6 to 7.

Embodiment 10. This embodiment provides a computer, including a processor and a storage medium. When the processor reads the computer program stored in the storage medium, the computer executes the method provided in any one of Embodiments 6 to 7. method.

The technical solutions provided by the present invention are further described in detail through several specific embodiments in order to highlight the advantages and benefits of the technical solutions provided by the present invention. However, the several specific embodiments described above are not intended to serve as a reference to the technical solutions provided by the present invention. Limitations of the invention: Any reasonable modifications and improvements, combinations of embodiments and equivalent substitutions of the invention based on the spirit and principles of the invention shall be included in the protection scope of the invention.

The description in this specification is only a preferred embodiment of the present invention, which cannot limit the scope of rights of the present invention; in addition, refer to the terms "one embodiment", "some embodiments", "example", "specific example" "," or "some examples" or the like means that a specific feature, structure, material or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the specific features, structures, materials or characteristics described may be combined in any suitable manner in any one or N embodiments or examples. Furthermore, those skilled in the art may combine and combine different embodiments or examples and features of different embodiments or examples described in this specification unless they are inconsistent with each other. In addition, the terms “first” and “second” are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of indicated technical features. Therefore, features defined as "first" and "second" may explicitly or implicitly include at least one of these features. In the description of the present invention, "N" means at least two, such as two, three, etc., unless otherwise clearly and specifically limited. Any process or method descriptions in flowcharts or otherwise described herein may be understood to represent modules, segments, or portions of code that include one or more executable instructions for implementing customized logical functions or steps of the process. , and the scope of the preferred embodiments of the invention includes additional implementations in which functions may be performed out of the order shown or discussed, including in a substantially simultaneous manner or in the reverse order, depending on the functionality involved, which shall It should be understood by those skilled in the art to which embodiments of the present invention belong. The logic and/or steps represented in the flowcharts or otherwise described herein, for example, may be considered a sequenced list of executable instructions for implementing the logical functions, and may be embodied in any computer-readable medium, For use by, or in combination with, instruction execution systems, devices or devices (such as computer-based systems, systems including processors or other systems that can fetch instructions from and execute instructions from the instruction execution system, device or device) or equipment. For the purposes of this specification, a "computer-readable medium" may be any device that can contain, store, communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device. More specific examples (non-exhaustive list) of computer readable media include the following: electrical connections with one or N wires (electronic device), portable computer disk cartridges (magnetic device), random access memory (RAM), Read-only memory (ROM), erasable and programmable read-only memory (EPROM or flash memory), fiber optic devices, and portable compact disc read-only memory (CDROM). Additionally, the computer-readable medium may even be paper or other suitable medium on which the program may be printed, as the paper or other medium may be optically scanned, for example, and subsequently edited, interpreted, or otherwise suitable as necessary. process to obtain the program electronically and then store it in computer memory. It should be understood that various parts of the present invention may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the N steps or methods may be implemented using software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if it is implemented in hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or their combination: discrete logic gate circuits with logic functions for implementing data signals. Logic circuits, application specific integrated circuits with suitable combinational logic gates, programmable gate arrays (PGA), field programmable gate arrays (FPGA), etc.

Those of ordinary skill in the art can understand that all or part of the steps involved in implementing the methods of the above embodiments can be completed by instructing relevant hardware through a program. The program can be stored in a computer-readable storage medium. The program can be stored in a computer-readable storage medium. When executed, one of the steps of the method embodiment or a combination thereof is included. In addition, each functional unit in various embodiments of the present invention can be integrated into a processing module, or each unit can exist physically alone, or two or more units can be integrated into one module. The above integrated modules can be implemented in the form of hardware or software function modules. If the integrated module is implemented in the form of a software function module and sold or used as an independent product, it can also be stored in a computer-readable storage medium.

Claims (10)

1. Superficial artery flow velocity and fluctuation monitoring flexible array sensing device, which is characterized by comprising:

a flexible backing layer having piezoresistive detection capabilities, a flexible matching layer in close proximity to the flexible backing layer;

the inverse piezoelectric effect detection unit is arranged between the flexible matching layer and the flexible backing layer, and is a Doppler type ultrasonic detection array and a B type ultrasonic detection array;

and the triboelectric detection module is closely attached to the flexible backing layer and is closely adjacent to the flexible matching layer.

2. The superficial arterial flow rate and fluctuation monitoring flexible arrayed sensing device of claim 1, wherein the doppler ultrasound probe array is disposed between the B ultrasound probe array and the triboelectric detection module.

3. The flexible array sensing device for monitoring superficial arterial flow velocity and fluctuation according to claim 1, wherein the doppler type ultrasonic detection array has a doppler type ultrasonic detection unit with a different inclination angle from other doppler type ultrasonic detection units.

4. The superficial arterial flow rate and fluctuation monitoring flexible array sensing device according to claim 1, wherein the triboelectric detection module is a triboelectric sensing unit.

5. The superficial arterial flow rate and fluctuation monitoring flexible array sensing device according to claim 4, wherein the triboelectric sensing unit comprises a layer of sensitive material and a layer of conductive material in close proximity.

6. The method for collecting the superficial artery flow velocity and fluctuation monitoring signals is characterized by comprising the following steps:

collecting signals to be detected under the unified clock signals;

processing noise and crosstalk of the signal to be tested according to a preset noise reduction method;

and extracting a preset signal in the signal to be detected.

7. The method for collecting superficial arterial flow velocity and wave monitoring signals according to claim 6, wherein the signal to be measured comprises arterial diameter wave condition in B mode and blood flow velocity information in doppler mode.

8. Superficial artery flow rate and fluctuation monitoring signal acquisition system, characterized by, the system includes:

a module for collecting signals to be tested under the unified clock signal;

a module for processing noise and crosstalk of the signal to be detected according to a preset noise reduction method;

and a module for extracting a preset signal in the signal to be detected.

9. Computer storage medium for storing a computer program, characterized in that the computer performs the method according to any one of claims 6-7 when the computer program is read by the computer.

10. Computer comprising a processor and a storage medium, characterized in that the computer performs the method according to any of claims 6-7 when the processor reads a computer program stored in the storage medium.