Intelligent monitoring and early warning device for pressure sores

Abstract

A pressure sore intelligent monitoring and early warning device disclosed by the present invention comprises a flexible pressure pad body, the flexible pressure pad body is made of a composite flexible material, the surface of the flexible pressure pad body is covered with a waterproof and antifouling coating, and sensor array modules are uniformly embedded in the upper surface of the flexible pressure pad body. The sensor array module is composed of thin film pressure sensors distributed in a 16 * 16 dot matrix mode, a central processing unit module is arranged in a cavity in the side edge of the flexible pressure pad body, and the central processing unit module is electrically connected with the sensor array module through a flexible circuit board. The flexible composite material is combined with the 16 * 16 dot matrix film pressure sensor array, so that the flexibility and the measurement precision of the sensor are remarkably improved, and the real-time accurate monitoring of pressure distribution is ensured.

Description

Technical Field

[0001] The present invention belongs to the technical field of intelligent pressure ulcer monitoring, and particularly relates to an intelligent pressure ulcer monitoring and warning device. Background Art

[0002] Pressure ulcers (also known as pressure injuries) are caused by prolonged compression, leading to ischemia and hypoxia of the skin and subcutaneous tissues, and further causing further damage. Clinically, the treatment of pressure ulcers is time-consuming and costly, which not only causes great pain to patients, but also may lead to serious complications such as infection and sepsis, and even threatens life, seriously increasing the medical and social burdens.

[0003] Traditional pressure sensors have limitations in flexibility, accuracy, and stability, making it difficult to achieve high-precision pressure distribution monitoring. In addition, the data preprocessing method is inefficient and cannot effectively eliminate the influence of noise and missing values on the analysis results, resulting in insufficient accuracy of risk assessment. Conventional warning methods are difficult to be effectively perceived. Moreover, existing pressure ulcer prediction models lack the ability of dynamic adjustment and cannot be updated in real time to adapt to the changes in the patient's state, resulting in delayed warning or misjudgment. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the existing defects and provide an intelligent pressure ulcer monitoring and warning device to solve the problems mentioned in the above background art.

[0005] To achieve the above object, the present invention provides the following technical solution: An intelligent pressure ulcer monitoring and warning device, including a flexible pressure pad body, the flexible pressure pad body is composed of a composite flexible material, the surface of the flexible pressure pad body is covered with a waterproof and anti-fouling coating, a sensor array module is evenly embedded on the upper surface of the flexible pressure pad body, the sensor array module is composed of thin film pressure sensors distributed in a 16×16 dot matrix, a central processing unit module is arranged in the inner cavity on the side of the flexible pressure pad body, the central processing unit module is electrically connected to the sensor array module through a flexible circuit board, a multi-modal warning module is arranged inside the flexible pressure pad body, the multi-modal warning module includes a vibration unit, an LED indicator light array unit, and a voice broadcaster, the vibration unit is installed in the central area of the back of the flexible pressure pad body, the LED indicator light array unit is distributed on the edge of the flexible pressure pad body, the voice broadcaster is integrated in the housing of the central processing unit module, a power management module is arranged at the tail of the flexible pressure pad body, the power management module is internally provided with a rechargeable lithium battery to supply power to each component through a wire, a wireless communication module is integrally arranged inside the central processing unit module, and the wireless communication module supports the Bluetooth 5.0 protocol for data interaction with an external terminal.

[0006] Preferably, each thin-film pressure sensor unit of the sensor array module is connected to a flexible circuit board through a micro spring contact, and the distance between adjacent sensor units is 2 cm, and the coverage area is 40 cm × 40 cm.

[0007] Preferably, the central processing unit module includes a main control chip and an AI algorithm co-processor. The main control chip adopts an ARM Cortex-M7 core, and the AI algorithm co-processor is built-in with a CNN-LSTM hybrid neural network model for real-time analysis of pressure distribution data and generation of risk level signals.

[0008] Preferably, the vibration unit includes two eccentric rotor motors, which are symmetrically distributed on the back of the flexible pressure pad body and support gradient intensity adjustment.

[0009] Preferably, the LED indicator array unit is composed of 12 RGB LED beads, which are equidistantly distributed along the four sides of the flexible pressure pad body, and indicate different risk levels through color changes: green for safe, yellow for low risk, and red for high risk.

[0010] Preferably, the power management module further includes a wireless charging coil and a USB-C interface. The wireless charging coil is embedded in the tail sandwich of the flexible pressure pad body and supports Qi-standard wireless charging.

[0011] Preferably, the device further includes a user interaction module. The user interaction module includes a touch button and a status display screen. The touch button is arranged on the side of the flexible pressure pad body, and the status display screen is an OLED screen, which is embedded on the surface of the housing of the central processing unit module for displaying a real-time pressure distribution map and a risk score.

[0012] Preferably, the bottom of the flexible pressure pad body is provided with an anti-slip silica gel layer, the surface texture is a honeycomb structure, and the thickness is 3 mm, which is used to enhance the adhesion of the device to the mattress or wheelchair.

[0013] Preferably, the device further includes a detachable protective cover, which is connected to the edge of the flexible pressure pad body through a magnetic interface, covers the sensor array module area, and the material is antibacterial TPU with a thickness of 0.5 mm.

[0014] Preferably, the external terminal is a mobile device or a cloud server, which receives real-time data through the wireless communication module and is configured with a warning strategy customization function, supporting users to set risk thresholds, warning modes, and data storage periods.

[0015] Compared with the prior art, the present invention provides a pressure ulcer intelligent monitoring and warning device, which has the following

[0016] Beneficial effects:

[0017] The present invention combines a flexible composite material with a 16×16 dot matrix thin-film pressure sensor array, significantly enhancing the flexibility and measurement accuracy of the sensor, ensuring real-time and accurate monitoring of pressure distribution; adopts a CNN-LSTM hybrid neural network model built in an AI algorithm co-processor to improve data preprocessing and dynamic analysis capabilities, effectively reducing noise interference and enhancing the real-time and accuracy of risk assessment; the multimodal warning module integrates vibration, LED indicator lights, and voice announcements, and uses gradient intensity adjustment and color change grading to prompt risks, taking into account the needs of users with different perception abilities and ensuring the efficient transmission of warning signals; and supports wireless communication and custom warnings. Combined with a detachable antibacterial protective cover and an anti-slip structure, it further improves the practicality, hygiene, and adaptability, providing great help for pressure ulcer prevention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation to the present invention. In the drawings:

[0019] Figure 1 is a schematic diagram of the external structure proposed by the present invention;

[0020] Figure 2 is a schematic diagram of the circuit of a pressure ulcer intelligent monitoring and warning device proposed by the present invention;

[0021] Figure 3 is a schematic diagram of the circuit of the multimodal warning module proposed by the present invention;

[0022] In the figure: 1, flexible pressure pad body; 2, sensor array module; 3, central processing unit module; 4, flexible circuit board; 5, multimodal warning module; 501, vibration unit; 502, LED indicator light array unit; 503, voice announcer; 6, power management module; 7, wireless communication module. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0024] Please refer to Figures 1 - 3The present invention provides a technical solution: an intelligent monitoring and early warning device for pressure sores, comprising a flexible pressure pad body 1, the flexible pressure pad body 1 is made of a composite flexible material, the surface of the flexible pressure pad body 1 is covered with a waterproof and antifouling coating, the upper surface of the flexible pressure pad body 1 is evenly embedded with a sensor array module 2, the sensor array module 2 is composed of a thin film pressure sensor with a 16×16 dot matrix distribution, a central processing unit module 3 is arranged in the inner cavity of the side of the flexible pressure pad body 1, the central processing unit module 3 is electrically connected to the sensor array module 2 through a flexible circuit board 4, a multi-modal early warning module 5 is arranged inside the flexible pressure pad body 1, and the multi-modal early warning Module 5 includes a vibration unit 501, an LED indicator array unit 502 and a voice announcer 503. The vibration unit 501 is installed in the central area of the back of the flexible pressure pad body 1, the LED indicator array unit 502 is distributed on the edge of the flexible pressure pad body 1, and the voice announcer 503 is integrated in the outer shell of the central processing unit module 3. A power management module 6 is provided at the tail of the flexible pressure pad body 1. The power management module 6 has a built-in rechargeable lithium battery and supplies power to each component through wires. A wireless communication module 7 is integrated inside the central processing unit module 3. The wireless communication module 7 supports the Bluetooth 5.0 protocol and is used for data interaction with an external terminal.

[0025] In the present invention, preferably, each thin film pressure sensor unit of the sensor array module 2 is connected to the flexible circuit board 4 via a micro spring contact, and the distance between adjacent sensor units is 2 cm, and the coverage area is 40 cm×40 cm.

[0026] In the present invention, preferably, the central processing unit module 3 includes a main control chip and an AI algorithm coprocessor. The main control chip adopts the ARMCortex-M7 core, and the AI algorithm coprocessor has a built-in CNN-LSTM hybrid neural network model for real-time analysis of pressure distribution data and generation of risk level signals.

[0027] In the present invention, preferably, the vibration unit 501 includes two eccentric rotor motors, which are symmetrically distributed on the back of the flexible pressure pad body 1 and support gradient intensity adjustment.

[0028] In the present invention, preferably, the LED indicator array unit 502 is composed of 12 RGBLED lamp beads, which are equidistantly distributed along the four sides of the flexible pressure pad body 1, and indicate different risk levels by color changes: green for safety, yellow for low risk, and red for high risk.

[0029] In the present invention, preferably, the power management module 6 also includes a wireless charging coil and a USB-C interface. The wireless charging coil is embedded in the tail interlayer of the flexible pressure pad body 1 and supports Qi standard wireless charging.

[0030] In the present invention, preferably, the device further includes a user interaction module. The user interaction module includes a touch button and a status display screen. The touch button is disposed on the side of the flexible pressure pad body 1, and the status display screen is an OLED screen embedded on the outer surface of the central processing module 3 for displaying the real-time pressure distribution map and the risk score.

[0031] In the present invention, preferably, the bottom of the flexible pressure pad body 1 is provided with an anti-slip silica gel layer, the surface texture is a honeycomb structure, and the thickness is 3 mm, which is used to enhance the adhesion between the device and the mattress or wheelchair.

[0032] In the present invention, preferably, the device further includes a detachable protective cover, which is connected to the edge of the flexible pressure pad body 1 through a magnetic interface, covers the sensor array module 2 area, and the material is antibacterial TPU with a thickness of 0.5 mm.

[0033] In the present invention, preferably, the external terminal is a mobile device or a cloud server, which receives real-time data through the wireless communication module 7 and is configured with a warning strategy customization function, supporting the user to set the risk threshold, warning mode and data storage period.

[0034] The working principle and usage process of the present invention: When in use, lay the flexible pressure pad body 1 flat on the wheelchair seat cushion, mattress or the contact surface to be monitored, ensure that the surface of the anti-slip silica gel layer at the bottom is a honeycomb structure with a thickness of 3 mm and is completely attached to the support surface to avoid sliding or wrinkling; if it needs to be fixed on a special surface such as a curved seat, the composite flexible material characteristics of the flexible pressure pad body 1 can be utilized to slightly bend it to adapt to the shape, but it is necessary to ensure that there is no excessive distortion in the sensor array module 2 area; align and adsorb the detachable protective cover made of antibacterial TPU to the edge of the flexible pressure pad body 1 through the magnetic interface to completely cover the sensor array module 2 area with a thickness of 0.5 mm. The protective cover needs to be disassembled and cleaned regularly to maintain hygiene; charge the built-in rechargeable lithium battery through the USB-C interface or the wireless charging coil supporting the Qi standard. It needs to be fully charged for the first time. When charging, the LED indicator 502 shows red and turns green after being fully charged; long press the touch button of the user interaction module 3 seconds on the side of the power management module 6 to start the device. At this time, the status display screen OLED screen shows the startup screen and completes the self-check process;

[0035] The sensor array module 2 consists of thin-film pressure sensors distributed in a 16×16 dot matrix, with an adjacent unit spacing of 2 cm, covering an area of 40 cm×40 cm, and is connected to the flexible circuit board 4 through micro spring contacts to collect the body pressure distribution data of the user in real time; when the user sits or lies on the flexible pressure pad body 1, the sensor array module 2 updates the pressure cloud map data every 0.5 seconds and transmits it to the central processing unit module 3 through the flexible circuit board 4; the central processing unit module 3 is built-in with an ARM Cortex-M7 main control chip and an AI algorithm co-processor, and runs a CNN-LSTM hybrid neural network model; after receiving the sensor data, the model performs the following operations:

[0036] Data preprocessing: Eliminate noise interference such as transient signals generated by slight limb movements, and fill in missing values caused by poor sensor contact.

[0037] Dynamic analysis: Combine historical data with real-time pressure distribution, calculate the local pressure duration, peak pressure and pressure gradient, and generate pressure ulcer risk levels of safe, low risk, and high risk.

[0038] The processing results are synchronously transmitted to an external terminal such as a mobile phone App or a cloud server through the wireless communication module 7 that supports the Bluetooth 5.0 protocol, and the user can remotely view the real-time pressure cloud map and risk score.

[0039] The LED indicator array unit 502 consists of 12 RGB lamp beads evenly distributed along the four sides of the flexible pressure pad body 1, and displays colors according to the risk level: green: uniform pressure distribution, no risk; yellow: local pressure exceeds the threshold, low risk, it is recommended to adjust the posture; red: continuous high-pressure area, high risk, immediate decompression is required.

[0040] The vibration unit 501 contains two eccentric rotor motors, symmetrically distributed in the central area of the back of the flexible pressure pad body 1. When the risk level rises to yellow or red, the motor vibrates according to the gradient intensity: low-intensity vibration: yellow warning, reminding to slightly adjust the posture; high-intensity vibration: red warning, need to get up immediately or change the body position.

[0041] The voice broadcaster 503 is integrated inside the housing of the central processing unit module 3. When the risk continuously exceeds the set threshold, it broadcasts voice prompts such as "A high-risk area is detected, please immediately adjust your sitting posture". Set the warning threshold, warning mode (only vibration / only light / mixed mode) and data storage period through the touch button; the status display screen displays the pressure distribution heat map, risk score and power information in real time, and supports touch zooming to view local details.

[0042] It is recommended to check the battery level weekly. When the battery is low, the LED indicator 502 blinks red, and it can be charged wirelessly or through the USB-C interface. When not in use for a long time, turn off the power and keep the battery level at 50% to extend the battery life. Remove the detachable protective cover weekly and wipe the antibacterial TPU surface with 75% alcohol to avoid liquid seeping into the sensor area. If the protective cover is damaged or loses elasticity, a new cover needs to be replaced to ensure the sensor sensitivity. Through the mobile phone App or the cloud platform, users can customize the warning strategy, such as setting the night silent mode, viewing the historical data trend chart, and receiving health reports. Medical staff can remotely monitor the pressure ulcer risks of multiple patients through the cloud and intervene in high-risk cases in a timely manner. If the status display screen prompts "sensor signal lost", check whether the connection of the flexible circuit board 4 is loose or whether the protective cover presses the sensor. If there is a measurement deviation after long-term use, the sensor calibration needs to be performed through the App and apply the standard weight for calibration according to the prompts. Ensure that the vibration unit 501 is not stuck by foreign objects and the LED lamp bead 502 is not damaged. Check whether the wireless communication module 7 is in a connected state and restart the device if necessary.

[0043] Although the embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made in these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An intelligent pressure ulcer monitoring and warning device, comprising a flexible pressure pad body (1), characterized in that, The flexible pressure pad body (1) is made of composite flexible materials. The surface of the flexible pressure pad body (1) is covered with a waterproof and anti-fouling coating. A sensor array module (2) is evenly embedded on the upper surface of the flexible pressure pad body (1). The sensor array module (2) is composed of thin-film pressure sensors distributed in a 16×16 dot matrix. A central processing unit module (3) is arranged in the inner cavity on the side of the flexible pressure pad body (1). The central processing unit module (3) is electrically connected to the sensor array module (2) through a flexible circuit board (4). A multi-modal warning module (5) is arranged inside the flexible pressure pad body (1). The multi-modal warning module (5) includes a vibration unit (501), an LED indicator array unit (502), and a voice broadcaster (503). The vibration unit (501) is installed in the central area of the back of the flexible pressure pad body (1). The LED indicator array unit (502) is distributed on the edge of the flexible pressure pad body (1). The voice broadcaster (503) is integrated inside the housing of the central processing unit module (3). A power management module (6) is arranged at the tail of the flexible pressure pad body (1). The power management module (6) is built with a rechargeable lithium battery and supplies power to each component through wires. A wireless communication module (7) is integrated inside the central processing unit module (3). The wireless communication module (7) supports the Bluetooth 5.0 protocol and is used for data interaction with an external terminal.

2. The intelligent pressure ulcer monitoring and early warning device according to claim 1, wherein: Each thin-film pressure sensor unit of the sensor array module (2) is connected to the flexible circuit board (4) through a micro spring contact, and the distance between adjacent sensor units is 2 cm, and the coverage area is 40 cm×40 cm.

3. The intelligent pressure ulcer monitoring and early warning device according to claim 1, characterized in that: The central processing unit module (3) includes a main control chip and an AI algorithm co-processor. The main control chip adopts an ARM Cortex-M7 core. The AI algorithm co-processor is built with a CNN-LSTM hybrid neural network model and is used for real-time analysis of pressure distribution data and generation of risk level signals.

4. An intelligent pressure ulcer monitoring and warning device according to claim 1, characterized in that: The vibration unit (501) includes two eccentric rotor motors, symmetrically distributed on the back of the flexible pressure pad body (1), and supports gradient intensity adjustment.

5. The intelligent pressure ulcer monitoring and early warning device according to claim 1, characterized in that: The LED indicator array unit (502) is composed of 12 RGB LED beads, evenly distributed at equal intervals along the four sides of the flexible pressure pad body (1), and indicates different risk levels through color changes: green for safe, yellow for low risk, and red for high risk.

6. The intelligent pressure ulcer monitoring and early warning device according to claim 1, characterized in that: The power management module (6) further includes a wireless charging coil and a USB-C interface. The wireless charging coil is embedded in the tail sandwich of the flexible pressure pad body (1) and supports Qi-standard wireless charging.

7. The intelligent pressure ulcer monitoring and early warning device according to claim 1, characterized in that: The device further includes a user interaction module. The user interaction module includes a touch button and a status display screen. The touch button is arranged on the side of the flexible pressure pad body (1). The status display screen is an OLED screen, embedded on the surface of the housing of the central processing unit module (3), and is used for displaying a real-time pressure distribution map and a risk score.

8. An intelligent pressure ulcer monitoring and early warning device according to claim 1, characterized in that: The bottom of the flexible pressure pad body (1) is provided with an anti-slip silica gel layer, the surface texture is a honeycomb structure, and the thickness is 3 mm, which is used to enhance the adhesion of the device to the mattress or wheelchair.

9. The intelligent pressure ulcer monitoring and early warning device according to claim 1, wherein: The device also includes a detachable protective cover, which is connected to the edge of the flexible pressure pad body (1) through a magnetic interface, covers the area of the sensor array module (2), the material is antibacterial TPU, and the thickness is 0.5 mm.

10. The intelligent pressure ulcer monitoring and warning device according to claim 1, characterized in that, The external terminal is a mobile device or a cloud server, which receives real-time data through the wireless communication module (7), and is configured with a warning strategy customization function, supporting users to set risk thresholds, warning modes and data storage periods.

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