Pulse detection device, pulse detection method, electronic equipment and storage medium

Abstract

The invention provides a pulse detection device, a pulse detection method, electronic equipment and a storage medium, and relates to the technical field of biomedical engineering. The device comprises a liquid bag and an optical fiber sensing module, a closed space is formed in the liquid bag, and the closed space in the liquid bag is filled with a conducting medium; the optical fiber sensing module is arranged in a closed space in the liquid bag, the input end of the optical fiber sensing module is connected with a light source in the integrated circuit module, and the output end of the optical fiber sensing module is connected with a signal acquisition assembly in the integrated circuit module; wherein the optical fiber sensing module is used for collecting optical signals input by a light source in the integrated circuit module, a signal collecting assembly in the integrated circuit module is used for converting the optical signals collected by the optical fiber sensing module into pulse wave signals, and the pulse wave signals are used for achieving pulse detection. The defects that an existing pulse detection device is difficult to comprehensively meet the real-time detection requirement and low in detection accuracy can be overcome.

Description

Technical Field

[0001] The present invention relates to the field of biomedical engineering technology, and in particular to a pulse detection device, a pulse detection method, an electronic device and a storage medium. Background Art

[0002] The pulse signal is an important physiological parameter that reflects the dynamic characteristics of blood flow, and has a wide range of application value in the fields of health monitoring, sports science, and human-computer interaction. In order to achieve efficient acquisition and analysis of pulse signals, researchers have developed a variety of pulse detection devices based on modern sensing technologies, such as pressure sensors and image sensors. Pressure sensors record pulse waves by detecting mechanical pressure changes, and have the characteristics of simple structure and easy implementation; image sensors obtain changes in pulse surface morphology based on optical imaging, and are suitable for non-contact detection; ultrasonic Doppler technology reflects pulse signals by monitoring changes in blood flow velocity, and has certain advantages in accuracy and dynamic characteristics. These technologies provide important support for the acquisition of pulse signals.

[0003] However, the existing technology still has many shortcomings. For example, pressure sensors are prone to signal drift, have limited performance in static pressure measurement, and have high requirements for signal amplification equipment, which increases cost and complexity; image sensors are sensitive to ambient light conditions and are difficult to maintain detection accuracy in complex scenarios. Overall, the pulse detection device in the existing technology still has room for improvement in stability and accuracy, and it is difficult to fully meet the needs of real-time detection and precise detection. Therefore, there is an urgent need for a pulse detection device with accurate measurement and good stability. Summary of the invention

[0004] The present invention provides a pulse detection device, a pulse detection method, an electronic device and a storage medium, which are used to solve the defects of the pulse detection device in the prior art that there is still room for improvement in stability and accuracy and it is difficult to fully meet the needs of real-time detection and accurate detection.

[0005] The present invention provides a pulse detection device, comprising: A liquid capsule, wherein a closed space is formed inside the liquid capsule, and the closed space inside the liquid capsule is filled with a conductive medium; An optical fiber sensing module, wherein the optical fiber sensing module is built into the enclosed space inside the liquid capsule, the input end of the optical fiber sensing module is connected to the light source in the integrated circuit module, and the output end of the optical fiber sensing module is connected to the signal acquisition component in the integrated circuit module; Among them, the optical fiber sensing module is used to collect the optical signal input by the light source in the integrated circuit module, and the signal acquisition component in the integrated circuit module is used to convert the optical signal collected by the optical fiber sensing module into a pulse wave signal, and the pulse wave signal is used to realize pulse detection.

[0006] According to a pulse detection device provided by the present invention, the optical fiber sensing module comprises a first plastic optical fiber, a sensing probe and a second plastic optical fiber; The output end of the first plastic optical fiber is connected to the input end of the sensing probe, and the output end of the sensing probe is connected to the input end of the second plastic optical fiber; The input end of the first plastic optical fiber is connected to the light source in the integrated circuit module; The output end of the second plastic optical fiber is connected to the signal acquisition component in the integrated circuit module.

[0007] According to a pulse detection device provided by the present invention, the sensing probe comprises a tapered plastic optical fiber, and the outer surface layer of the tapered plastic optical fiber is covered with polydimethylsiloxane.

[0008] According to a pulse detection device provided by the present invention, the signal acquisition component includes a photosensitive diode and a single-chip microcomputer; The input end of the photosensitive diode is connected to the output end of the second plastic optical fiber, and the output end of the photosensitive diode is connected to the single chip microcomputer; The photodiode is used to convert the optical signal outputted from the output end of the second plastic optical fiber into an electrical signal, and the single chip microcomputer is used to convert the electrical signal into a pulse wave signal.

[0009] According to a pulse detection device provided by the present invention, the output end of the single chip microcomputer is connected to a computer terminal, and the computer terminal is used for real-time visual display of the pulse wave signal.

[0010] According to a pulse detection device provided by the present invention, the pulse detection device includes three liquid capsules, three optical fiber sensor modules and three integrated circuit modules.

[0011] The present invention also provides a pulse detection method, the method comprising: collecting an optical signal input by a light source in an integrated circuit module through an optical fiber sensing module, and outputting the optical signal to a signal acquisition module in the integrated circuit module; the optical fiber sensing module is built into a closed space inside a liquid capsule, and the closed space inside the liquid capsule is filled with a conductive medium; The received optical signal is converted into a pulse wave signal by the signal acquisition module, and the pulse wave signal is used to realize pulse detection.

[0012] According to a pulse detection method provided by the present invention, the signal acquisition module includes a photosensitive diode and a single chip microcomputer, and the photosensitive diode and the single chip are connected in sequence; The step of converting the received optical signal into a pulse wave signal by the signal acquisition module comprises: The received optical signal is converted into an electrical signal by a photodiode in the signal acquisition module; The electrical signal output by the photodiode is converted into a pulse wave signal by the single chip microcomputer in the signal acquisition module.

[0013] The present invention also provides an electronic device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements any of the above-mentioned pulse detection methods when executing the computer program.

[0014] The present invention also provides a non-transitory computer-readable storage medium having a computer program stored thereon, and when the computer program is executed by a processor, the pulse detection method described in any one of the above is implemented.

[0015] The present invention provides a pulse detection device, a pulse detection method, an electronic device and a storage medium. The pulse detection device includes a liquid capsule, an optical fiber sensing module and an integrated circuit module. A closed space is formed inside the liquid capsule, and the closed space inside the liquid capsule is filled with a conductive medium. The optical fiber sensing module is built into the closed space inside the liquid capsule. The input end of the optical fiber sensing module is connected to a light source in the integrated circuit module, and the output end of the optical fiber sensing module is connected to a signal acquisition component in the integrated circuit module. The optical fiber sensing module is used to collect an optical signal input by the light source in the integrated circuit module, and the signal acquisition component in the integrated circuit module is used to convert the optical signal collected by the optical fiber sensing module into a pulse wave signal. , the pulse wave signal is used to realize pulse detection; the present invention forms a closed space inside the liquid capsule and fills it with a conductive medium, which can sensitively transmit the mechanical vibration of the pulse wave from the human body surface, and at the same time improve the coupling between the optical fiber sensing module and the pulse signal, avoiding the requirement of precise alignment of the sensor and the pulse position; the optical fiber sensing module is highly sensitive to mechanical vibration and can convert the liquid capsule deformation caused by the pulse wave into light intensity change, that is, to characterize the liquid capsule deformation caused by the pulse wave by real-time acquisition of optical signals; the signal acquisition component in the integrated circuit module further acquires and processes the optical signal and converts it into a pulse wave signal, and pulse detection can be realized by determining the pulse wave signal, which effectively improves the real-time and accurate detection capabilities of the pulse detection device. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. 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 any creative work.

[0017] Figure 1This is one of the structural schematic diagrams of the pulse detection device provided by the present invention.

[0018] Figure 2 This is the second structural schematic diagram of the pulse detection device provided by the present invention.

[0019] Figure 3 It is a flow chart of the pulse detection method provided by the present invention.

[0020] Figure 4 It is a structural schematic diagram of the electronic device provided by the present invention. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings 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 ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] As a dynamic characteristic parameter of human blood flow, pulse signal is widely used in health monitoring and physiological characteristic analysis. However, the applicant found in the long-term research process that the existing pulse detection technology still has significant deficiencies in detection stability and signal accuracy, especially in complex environments or dynamic scenes, which will seriously affect the detection effect.

[0023] In further research, the applicant found that the existing technology has solved the problem of pulse signal acquisition to a certain extent. For example, mechanical vibration can be captured by pressure sensors, non-contact detection can be achieved by image sensors, and ultrasonic Doppler technology can provide accurate blood flow velocity change information. However, the limitations of these technologies make it difficult to fully meet the needs of real-time detection and high-precision detection.

[0024] Specifically, although traditional pressure sensor-based detection devices can record pulse waves, they are easily affected by signal drift and environmental noise, and have limited performance in measuring static pressure. They also require special signal amplification equipment, which increases system complexity and cost. Image sensor-based detection devices rely on ambient light conditions, have poor adaptability to complex light scenes, and are difficult to work stably in practical applications. Although ultrasonic Doppler technology has certain advantages in terms of accuracy, its equipment cost is high, the system is complex, and its application in dynamic real-time detection is limited.

[0025] Based on the above analysis, the applicant realizes that there is an urgent need for a new pulse detection device that can overcome the problem of environmental dependence, improve the sensitivity and stability of detection, and meet the dual needs of real-time detection and accurate detection.

[0026] In view of the above problems, the present invention proposes the following embodiments.

[0027] Figure 1 FIG. 1 is one of the structural schematic diagrams of the pulse detection device provided by the present invention, such as Figure 1 As shown, the pulse detection device includes a liquid capsule, an optical fiber sensing module and an integrated circuit module, wherein a closed space is formed inside the liquid capsule, and the closed space inside the liquid capsule is filled with a conductive medium; the optical fiber sensing module is built into the closed space inside the liquid capsule, the input end of the optical fiber sensing module is connected to the light source in the integrated circuit module, and the output end of the optical fiber sensing module is connected to the signal acquisition component in the integrated circuit module; wherein the optical fiber sensing module is used to collect the optical signal input by the light source in the integrated circuit module, and the signal acquisition component in the integrated circuit module is used to convert the optical signal collected by the optical fiber sensing module into a pulse wave signal, and the pulse wave signal is used to realize pulse detection.

[0028] It should be noted that the liquid capsule is a flexible container with a closed space inside and filled with a conductive medium. The liquid capsule can transmit the pulse wave on the surface of the human body through mechanical vibration, while isolating the interference of the external environment to ensure the stability and accuracy of signal transmission. Specifically, the conductive medium can efficiently transmit the mechanical vibration of the human pulse wave to the optical fiber sensing module, thereby improving the detection sensitivity.

[0029] Here, the optical fiber sensing module is used to collect the optical signal input by the light source in real time, so as to be able to convert the mechanical vibration changes into light intensity changes, which has the advantages of high sensitivity and non-contact measurement.

[0030] Here, the signal acquisition component is a subunit in the integrated circuit module, which is used to convert the optical signal output by the optical fiber sensing module into a pulse wave signal, and then the pulse wave signal can be analyzed to extract the frequency, amplitude and other information of the pulse to achieve pulse detection.

[0031] In one embodiment, a liquid capsule is installed at one of the three parts of the user, namely, Cun, Guan, and Chi. A fiber optic sensing module is built into a closed space of the liquid capsule. The input end of the fiber optic sensing module is connected to a light source, and the output end is connected to a signal acquisition component. At this time, the conductive medium inside the liquid capsule can sensitively respond to the mechanical vibration caused by the pulse wave on the surface of the human body, and transmit the mechanical vibration to the fiber optic sensing module. The fiber optic sensing module is highly sensitive to mechanical vibration. Each vibration will affect the vibration of the fiber optic sensing module, thereby causing fluctuations in the optical signal transmission in the fiber optic sensing module. Since the fiber optic sensing module collects the optical signal input by the light source in real time, it can convert the mechanical vibration transmitted by the conductive medium in the liquid capsule into a light intensity change signal, and use the change of the optical signal to characterize the pulse wave, thereby avoiding the requirement for precise alignment of the fiber optic sensing module with the pulse position.

[0032] For the specific components of the optical fiber sensing module and the signal acquisition assembly, please refer to the following embodiments and will not be elaborated here.

[0033] The pulse detection device provided by the embodiment of the present invention can sensitively transmit the mechanical vibration of the pulse wave from the human body surface by forming a closed space inside the liquid capsule and filling it with a conductive medium, while improving the coupling between the optical fiber sensing module and the pulse signal, avoiding the requirement for precise alignment of the sensor and the pulse position; the optical fiber sensing module is highly sensitive to mechanical vibration and can convert the liquid capsule deformation caused by the pulse wave into light intensity change, that is, collect light signals in real time to characterize the liquid capsule deformation caused by the pulse wave; the signal acquisition component in the integrated circuit module further collects and processes the light signal and converts it into a pulse wave signal, and pulse detection can be achieved by determining the pulse wave signal, which effectively improves the real-time and precise detection capabilities of the pulse detection device.

[0034] like Figure 2 As shown, based on any of the above embodiments, in the device, the optical fiber sensing module includes a first plastic optical fiber, a sensing probe and a second plastic optical fiber; The output end of the first plastic optical fiber is connected to the input end of the sensing probe, and the output end of the sensing probe is connected to the input end of the second plastic optical fiber; The input end of the first plastic optical fiber is connected to the light source in the integrated circuit module; The output end of the second plastic optical fiber is connected to the signal acquisition component in the integrated circuit module.

[0035] It should be noted that the first plastic optical fiber and the second plastic optical fiber are optical fibers made with polymer materials as the core. Compared with traditional glass optical fibers, plastic optical fibers have significant advantages in flexibility, processability and cost, and are widely used in optical signal transmission and sensing systems.

[0036] In one embodiment, the input end of the first plastic optical fiber is connected to a light source, and the output end of the first plastic optical fiber is connected to the input end of the sensing probe. The light source provides a stable optical signal, and the first plastic optical fiber transmits the optical signal to the sensing probe; the first plastic optical fiber serves as a transmission path for the optical signal, ensuring that the optical signal reaches the sensing probe stably and efficiently, providing a guarantee for subsequent signal coupling; the sensing probe is located in the enclosed space of the liquid capsule, and by coupling the optical signal with the change in the mechanical vibration of the liquid capsule, the deformation caused by the pulse wave is converted into a light intensity change signal. The high sensitivity of the sensing probe to mechanical vibration enables it to accurately capture the subtle changes in the pulse wave signal, and characterize it through the change in light intensity, thereby enhancing the sensitivity and reliability of the signal; the input end of the second plastic optical fiber is connected to the output end of the sensing probe, and its output end is connected to the signal acquisition component, and the second plastic optical fiber transmits the optical signal output by the sensing probe to the signal acquisition component in the integrated circuit module.

[0037] Here, the sensor probe is the core component of the optical fiber sensor module, which is used to couple and convert the optical signal with the mechanical vibration change of the liquid capsule. The sensor probe has high sensitivity and can detect subtle mechanical vibrations; it has strong adaptability and can be used with different types of conductive media. The specific composition of the sensor probe can be referred to the following embodiments, and no further details are given here.

[0038] The pulse detection device provided by the embodiment of the present invention realizes efficient collection, transmission and conversion of optical signals through the synergistic effect of the first plastic optical fiber, the sensing probe and the second plastic optical fiber. The first plastic optical fiber receives the optical signal from the light source and stably transmits it to the sensing probe; the sensing probe sensitively responds to the mechanical vibration caused by the external pulse and converts the deformation in the liquid capsule into a change in the optical signal; then, the second plastic optical fiber efficiently transmits the modulated optical signal to the signal acquisition component for processing. Through this design, the optical signal always maintains high-quality transmission throughout the process, while effectively avoiding environmental interference, significantly improving the sensitivity and accuracy of pulse signal detection. In addition, the structure makes full use of the flexibility, low cost and high coupling efficiency of the plastic optical fiber, making the device more adaptable in complex environments, reducing manufacturing costs, and providing technical guarantees for real-time and high-precision pulse detection.

[0039] Based on any of the above embodiments, in the device, the sensing probe comprises a tapered plastic optical fiber, and the outer surface layer of the tapered plastic optical fiber is covered with polydimethylsiloxane.

[0040] Here, the tapered plastic optical fiber is manufactured by tapering ordinary plastic optical fiber, that is, plastic optical fiber with a diameter of usually 0.25 mm. The taper process gradually reduces the diameter of the optical fiber, thereby forming a tapered structure. The characteristics of this structure are: when the optical fiber is bent or subjected to external forces, the transmission of light in the optical fiber will be significantly affected, resulting in increased transmission loss of the optical signal. The tapered structure increases the sensitivity of the optical fiber to small mechanical deformations, thereby improving the sensor's ability to detect external vibrations or pressure changes.

[0041] Here, polydimethylsiloxane (PDMS) is a soft, transparent silicone material with excellent mechanical and optical properties. PDMS prevents external physical damage or pollution from affecting the optical fiber. The flexibility and elasticity of PDMS enable it to effectively transfer external mechanical deformation (such as sac deformation caused by pulse) to the optical fiber. The refractive index of PDMS matches well with the optical fiber material, which can reduce interface reflection loss and optimize the transmission efficiency of optical signals.

[0042] For example, the sensitivity of the sensor probe is as high as 0.496 dB / kPa, which can accurately capture subtle pulse beats.

[0043] The pulse detection device provided by the embodiment of the present invention adopts a tapered plastic optical fiber as a sensing probe and covers its outer layer with polydimethylsiloxane (PDMS), which can significantly improve the sensing performance and sensitivity. The tapered plastic optical fiber is formed into a gradually decreasing optical fiber diameter through a taper process. When it bends in the sensing area, it will produce a large light transmission loss due to the micro-bending effect, thereby enhancing the detection sensitivity of mechanical deformation. The covering PDMS material has high flexibility, good transparency and excellent deformation transmission performance, which can effectively transmit external mechanical pressure while protecting the optical fiber from environmental influences. Combined with the tapered structure and PDMS coating, the sensing probe can more accurately sense the deformation caused by the pulse wave, significantly improve the real-time and accuracy of the pulse detection device, overcome the defects of insufficient sensitivity and poor anti-interference of traditional sensors, and finally achieve efficient and stable pulse signal acquisition.

[0044] like Figure 2 As shown, based on any of the above embodiments, in the device, the signal acquisition component includes a photosensitive diode and a single-chip microcomputer; The input end of the photosensitive diode is connected to the output end of the second plastic optical fiber, and the output end of the photosensitive diode is connected to the single chip microcomputer; The photodiode is used to convert the optical signal outputted from the output end of the second plastic optical fiber into an electrical signal, and the single chip microcomputer is used to convert the electrical signal into a pulse wave signal.

[0045] It should be noted that the photodiode is a photoelectric conversion device that converts optical signals into electrical signals. When the optical signal from the second plastic optical fiber is input to the photodiode, the photodiode will generate a corresponding current or voltage signal according to the change in light intensity. Here, the optical signal carries the human pulse information, and its light intensity changes periodically with the deformation caused by the pulse wave. Therefore, the electrical signal output by the photodiode reflects this change, providing a data basis for subsequent processing.

[0046] Furthermore, after receiving the electrical signal output by the photodiode, the single chip microcomputer digitizes and processes the signal through an algorithm, thereby extracting the characteristics of the pulse wave signal, such as period, amplitude and waveform shape.

[0047] The pulse detection device provided by the embodiment of the present invention realizes efficient conversion of optical signals into pulse wave signals through a signal acquisition component composed of a photodiode and a single chip. First, the photodiode receives the optical signal transmitted by the second plastic optical fiber and converts it into an electrical signal. This process utilizes the sensitive response characteristics of the photodiode to changes in light intensity to effectively capture the weak light intensity fluctuations caused by the pulse wave, thereby ensuring the high fidelity of the signal. Subsequently, the single chip microcomputer digitizes the electrical signal and extracts characteristic information of the pulse wave, such as waveform morphology and periodic changes, through an algorithm. Through this design, the entire signal acquisition process realizes high-sensitivity and high-accuracy pulse detection, while having good real-time performance and stability, significantly improving the detection performance and adaptability of the device, and meeting the needs of multi-scenario applications.

[0048] Based on any of the above embodiments, in the device, the output end of the single chip microcomputer is connected to a computer terminal, and the computer terminal is used to visually display the pulse wave signal in real time.

[0049] Here, the computer terminal is an external device used to receive, process and display the signal data transmitted from the single-chip microcomputer. It can not only display the pulse wave signal in real time, but also store, analyze and share data, providing users with more functional expansion possibilities.

[0050] The pulse detection device provided by the embodiment of the present invention realizes the real-time visual display of the pulse wave signal through the connection between the single-chip microcomputer and the computer terminal. After the single-chip microcomputer processes the electrical signal converted by the photodiode into a pulse wave signal, the data is transmitted to the computer terminal through the output terminal. The computer terminal receives and processes this data, and uses a graphical interface to display the dynamic changes of the pulse wave signal in real time in the form of a waveform. This design enhances the intuitiveness and interpretability of the data through real-time visualization, allowing users to quickly identify the characteristics of the pulse signal. At the same time, the computer terminal can further store, analyze or share these signal data, which provides convenience for subsequent research or clinical applications. The overall design improves the data interaction capability and user experience of the device, and fully meets the needs of efficient detection and information sharing.

[0051] Based on any of the above embodiments, in the device, the pulse detection device includes three liquid capsules, three optical fiber sensor modules and three integrated circuit modules.

[0052] In one embodiment, three liquid capsules correspond to the three pulse positions of Cun, Guan and Chi on the human wrist respectively. These liquid capsules form a closed space inside, which is filled with a conductive medium, and can sensitively sense the mechanical vibration from the skin surface and efficiently transmit it to the internal optical fiber sensing module. Further, each liquid capsule has a built-in optical fiber sensing module, which includes a first plastic optical fiber, a sensing probe and a second plastic optical fiber. The optical fiber sensing module is highly sensitive to the tiny deformation of the liquid capsule caused by the pulse wave, and can convert these deformations into changes in light intensity to form an optical signal. Further, each optical fiber sensing module is connected to an independent integrated circuit module; specifically, the integrated circuit module includes a light source and a signal acquisition component; the input end of the first plastic optical fiber in each optical fiber sensing module is connected to a light source, and the output end of the second plastic optical fiber in each optical fiber sensing module is connected to a signal acquisition component; the signal acquisition component includes a photosensitive diode and a single-chip microcomputer, the photosensitive diode converts the optical signal output by the second plastic optical fiber into an electrical signal, and the single-chip microcomputer filters, amplifies and digitally processes the electrical signal, thereby generating a pulse wave signal corresponding to the pulse position.

[0053] For example, a plastic optical fiber with a diameter of 0.25 mm is fixed in the card slot of the stretching platform of the fusion taper machine, and the taper machine is set to the manual stretching mode, and a tapered plastic optical fiber is prepared after stretching. Subsequently, the PDMS solution is poured into the mold to prepare a uniform PDMS film, and the surface of the PDMS film is covered on the prepared tapered plastic optical fiber to form three sensing probes. The three sensing probes are connected to three circular substrates respectively and placed in a liquid capsule to form a preliminary sealing structure. After the structure is fixed, glycerol is injected into the confined space between the substrate and the sensing probe as a conductive medium using a syringe, and then the injection port is sealed with a PDMS solution again. After the PDMS is completely solidified, the production of the sensing probe of the tapered plastic optical fiber sealed in the liquid capsule is successfully completed. Next, the light source, photodiode and Arduino microcontroller are integrated on a voltage signal acquisition circuit board to form an integrated circuit module. According to the needs of pulse detection, the output ends of three independent fiber optic sensor probes are connected to three photosensitive diodes respectively, the input ends of three independent fiber optic sensor probes are connected to three light sources respectively, and the three photosensitive diodes are connected to three Arduino microcontrollers respectively; the three liquid capsules are placed corresponding to the three pulse positions of Cun, Guan and Chi on the human wrist respectively. When the blood changes periodically, the sensor probe detects the change in light intensity and converts the periodic changes of blood into changes in light signals. Then the photosensitive diodes convert the three light signals into three electrical signals, and the three Arduino microcontrollers convert the three electrical signals into pulse wave signals respectively, thereby realizing pulse collection.

[0054] The pulse detection device provided by the embodiment of the present invention realizes the synchronous extraction of pulse signals of three parts, namely, Cun, Guan and Chi, through the combination of three liquid capsules, three optical fiber sensing modules and three integrated circuit modules. Compared with the limitation that the traditional sensor needs to be precisely aligned with the position of the artery, the device relies on the sensitivity and adaptability of the liquid capsule and the tapered plastic optical fiber sensing probe, and can collect pulse signals without precisely aligning the position of the artery. At the same time, the device captures the weak light intensity changes caused by blood flow through the highly sensitive optical fiber sensing module, and combines the signal processing capability of the integrated circuit module to ensure the accurate quantification and stable collection of the pulse signal. Finally, through the real-time visualization function, the pulse data of the three parts, namely, Cun, Guan and Chi, are intuitively presented, overcoming the problem that the traditional method is insufficient in the quantitative analysis capability of the pulse signal.

[0055] Based on the pulse detection device provided above, the present invention also provides a pulse detection method, such as Figure 3 As shown, the method includes: Step 310, collecting the optical signal input by the light source in the integrated circuit module through the optical fiber sensing module, and outputting the optical signal to the signal acquisition module in the integrated circuit module; the optical fiber sensing module is built into the enclosed space inside the liquid capsule, and the enclosed space inside the liquid capsule is filled with a conductive medium.

[0056] It should be noted that the fiber optic sensing module can capture the tiny mechanical vibrations caused by the pulse wave in real time to ensure detection accuracy. The conductive medium filled in the liquid capsule can evenly transmit vibrations, avoid signal loss and interference, and improve the stability and consistency of the optical signal. The fiber optic sensing module is built into the liquid capsule, and the optical signal changes are coupled through mechanical vibration. There is no need to accurately align the artery position, which simplifies the detection process. Through the design of the liquid capsule and the filling of the conductive medium, this step enables the fiber optic sensing module to be efficiently integrated into the pulse detection device, simplifying the structure and improving reliability.

[0057] Step 320: convert the received optical signal into a pulse wave signal through the signal acquisition module, and the pulse wave signal is used to realize pulse detection.

[0058] Here, the pulse wave signal is the fluctuation formed when blood propagates in the arteries, which represents the periodic changes in blood flow each time the heart contracts.

[0059] The pulse detection method provided by the embodiment of the present invention collects the optical signal input by the light source in the integrated circuit module through the optical fiber sensing module, and transmits the signal to the signal acquisition module, and the signal acquisition module converts the optical signal into a pulse wave signal to realize pulse detection. First, the optical fiber sensing module is built into the closed space in the liquid capsule, and can sensitively capture the tiny deformation caused by the pulse wave through the filled conductive medium, so as to accurately reflect the dynamic characteristics of blood flow. Secondly, the pulse detection method avoids the requirement for precise alignment of the sensor and the pulse position, and improves the flexibility of detection and the ease of operation. Furthermore, the signal acquisition module can efficiently convert the optical signal into a pulse wave signal, ensuring the high-quality capture of the pulse wave, thereby enhancing the real-time and accuracy of pulse detection.

[0060] Based on the pulse detection method provided above, the signal acquisition module mentioned in the method includes a photosensitive diode and a single chip microcomputer, and the photosensitive diode and the single chip are connected in sequence; The step of converting the received optical signal into a pulse wave signal by the signal acquisition module comprises: The received optical signal is converted into an electrical signal by a photodiode in the signal acquisition module; The electrical signal output by the photodiode is converted into a pulse wave signal by the single chip microcomputer in the signal acquisition module.

[0061] The pulse detection method provided by the embodiment of the present invention, first, the photodiode as a core component can efficiently convert the optical signal into an electrical signal, has a fast response and high sensitivity, and can accurately capture the light intensity changes caused by the pulse wave. Then, the single-chip microcomputer, as the signal processing core, further converts the electrical signal output by the photodiode into a pulse wave signal. The high-performance computing capability of the single-chip microcomputer ensures the real-time and accuracy of signal processing, and can efficiently process and transmit pulse data. Through this process, the extraction of the pulse wave signal becomes more efficient and stable, which helps to improve the real-time and accuracy of pulse detection.

[0062] Based on the pulse detection method provided above, after obtaining the pulse wave signal, the method further includes subjecting the pulse wave signal to Fourier transformation to obtain the heart rate.

[0063] Exemplarily, after the pulse wave signal is processed by Fourier transform, the heart rate information can be effectively extracted. The beneficial effects of this process are reflected in the following aspects: First, the pulse wave signal can be converted from the time domain to the frequency domain through Fourier transform, and different frequency components can be separated, so as to extract the main frequency components related to the heart rate. Fourier transform can accurately capture periodic fluctuations, so as to accurately calculate the heart rate, and effective frequency analysis can be obtained regardless of whether there is noise or interference in the pulse wave signal. This processing method makes the extraction of heart rate more accurate and reliable, while avoiding the direct interpretation of complex signals, and improving the efficiency and accuracy of detection. Therefore, this method can not only provide real-time pulse wave monitoring, but also accurately calculate the heart rate, providing a more scientific and efficient solution for health monitoring.

[0064] Based on the pulse detection method provided above, after obtaining the pulse wave signal, the pulse wave signal is passed through the random forest model to obtain the blood pressure prediction.

[0065] Exemplarily, by inputting the pulse wave signal into the random forest model, blood pressure can be effectively predicted. The beneficial effects of this process are reflected in the following aspects: First, random forest is a powerful machine learning algorithm that can handle complex nonlinear relationships and has strong noise resistance. By training the random forest model, the system can extract features related to blood pressure from the pulse wave signal and establish a mapping relationship between the pulse wave signal and blood pressure. Compared with traditional blood pressure measurement methods, using pulse wave signals as input can avoid direct measurement of blood pressure, thereby reducing discomfort and measurement complexity. At the same time, the random forest model can efficiently process a large number of input features, improving the accuracy and stability of the prediction. In this way, users can not only monitor pulse waves in real time, but also accurately predict blood pressure, thereby achieving convenient health management and early disease warning.

[0066] Figure 4 An example of a physical structure diagram of an electronic device is shown in FIG. Figure 4 As shown, the electronic device may include: a processor 410, a communications interface 420, a memory 430 and a communication bus 440, wherein the processor 410, the communications interface 420 and the memory 430 communicate with each other through the communication bus 440. The processor 410 may call the logic instructions in the memory 430 to execute the pulse detection method, which includes: collecting the optical signal input by the light source in the integrated circuit module through the optical fiber sensing module, and outputting the optical signal to the signal acquisition module in the integrated circuit module; the optical fiber sensing module is built in the closed space inside the liquid capsule, and the closed space inside the liquid capsule is filled with a conductive medium; the received optical signal is converted into a pulse wave signal through the signal acquisition module, and the pulse wave signal is used to realize pulse detection.

[0067] In addition, the logic instructions in the above-mentioned memory 430 can be implemented in the form of a software functional unit and can be stored in a computer-readable storage medium when it is sold or used as an independent product. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art or the part of the technical solution, can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk, etc. Various media that can store program codes.

[0068] On the other hand, the present invention also provides a computer program product, which includes a computer program. The computer program can be stored on a non-transitory computer-readable storage medium. When the computer program is executed by a processor, the computer can execute the pulse detection method provided by the above methods, which includes: collecting the optical signal input by the light source in the integrated circuit module through the optical fiber sensing module, and outputting the optical signal to the signal acquisition module in the integrated circuit module; the optical fiber sensing module is built into the enclosed space inside the liquid capsule, and the enclosed space inside the liquid capsule is filled with a conductive medium; the received optical signal is converted into a pulse wave signal by the signal acquisition module, and the pulse wave signal is used to realize pulse detection.

[0069] On the other hand, the present invention also provides a non-transitory computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, is implemented to execute the pulse detection method provided by the above-mentioned methods, the method comprising: collecting an optical signal input by a light source in an integrated circuit module through an optical fiber sensing module, and outputting the optical signal to a signal acquisition module in the integrated circuit module; the optical fiber sensing module is built into a confined space inside a liquid capsule, and the confined space inside the liquid capsule is filled with a conductive medium; the received optical signal is converted into a pulse wave signal through the signal acquisition module, and the pulse wave signal is used to realize pulse detection.

[0070] The device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Ordinary technicians in this field can understand and implement it without paying creative labor.

[0071] Through the description of the above implementation methods, those skilled in the art can clearly understand that each implementation method can be implemented by means of software plus a necessary general hardware platform, and of course, can also be implemented by hardware. Based on this understanding, the above technical solution is essentially or the part that contributes to the prior art can be embodied in the form of a software product, and the computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a disk, an optical disk, etc., including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or some parts of the embodiments.

[0072] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A pulse detection device, characterized in that: include: A liquid capsule, wherein a closed space is formed inside the liquid capsule, and the closed space inside the liquid capsule is filled with a conductive medium; An optical fiber sensing module, wherein the optical fiber sensing module is built into the enclosed space inside the liquid capsule, the input end of the optical fiber sensing module is connected to the light source in the integrated circuit module, and the output end of the optical fiber sensing module is connected to the signal acquisition component in the integrated circuit module; Among them, the optical fiber sensing module is used to collect the optical signal input by the light source in the integrated circuit module, and the signal acquisition component in the integrated circuit module is used to convert the optical signal collected by the optical fiber sensing module into a pulse wave signal, and the pulse wave signal is used to realize pulse detection.

2. The pulse detection device according to claim 1, characterized in that: The optical fiber sensing module comprises a first plastic optical fiber, a sensing probe and a second plastic optical fiber; The output end of the first plastic optical fiber is connected to the input end of the sensing probe, and the output end of the sensing probe is connected to the input end of the second plastic optical fiber; The input end of the first plastic optical fiber is connected to the light source in the integrated circuit module; The output end of the second plastic optical fiber is connected to the signal acquisition component in the integrated circuit module.

3. The pulse detection device according to claim 2, characterized in that: The sensing probe comprises a tapered plastic optical fiber, and the outer surface of the tapered plastic optical fiber is covered with polydimethylsiloxane.

4. The pulse detection device according to claim 2, characterized in that: The signal acquisition component includes a photosensitive diode and a single-chip microcomputer; The input end of the photosensitive diode is connected to the output end of the second plastic optical fiber, and the output end of the photosensitive diode is connected to the single chip microcomputer; The photodiode is used to convert the optical signal outputted from the output end of the second plastic optical fiber into an electrical signal, and the single chip microcomputer is used to convert the electrical signal into a pulse wave signal.

5. The pulse detection device according to claim 4, characterized in that: The output end of the single chip microcomputer is connected to a computer terminal, and the computer terminal is used for real-time visual display of the pulse wave signal.

6. The pulse detection device according to claim 1, characterized in that: The pulse detection device comprises three liquid capsules, three optical fiber sensing modules and three integrated circuit modules.

7. A pulse detection method, characterized in that: Applied to the pulse detection device according to any one of claims 1 to 6, the method comprises: The optical signal input by the light source in the integrated circuit module is collected by the optical fiber sensing module, and the optical signal is output to the signal acquisition module in the integrated circuit module; the optical fiber sensing module is built into the closed space inside the liquid capsule, and the closed space inside the liquid capsule is filled with a conductive medium; The received optical signal is converted into a pulse wave signal by the signal acquisition module, and the pulse wave signal is used to realize pulse detection.

8. The pulse detection method according to claim 7, characterized in that: The signal acquisition module includes a photosensitive diode and a single chip microcomputer, and the photosensitive diode and the single chip are connected in sequence; The step of converting the received optical signal into a pulse wave signal by the signal acquisition module comprises: The received optical signal is converted into an electrical signal by a photodiode in the signal acquisition module; The electrical signal output by the photodiode is converted into a pulse wave signal by the single chip microcomputer in the signal acquisition module.

9. An electronic device comprising a memory, a processor, and a computer program stored in the memory and running on the processor, characterized in that: When the processor executes the computer program, the pulse detection method according to any one of claims 7 to 8 is implemented.

10. A non-transitory computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the pulse detection method according to any one of claims 7 to 8 is implemented.

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