Multi-source sensing fusion lower limb thrombus real-time detection device

Abstract

The invention relates to the technical field of medical equipment, and discloses a multi-source sensing fusion lower limb thrombus real-time detection device which comprises a controller, an array detection unit is arranged at the upper end of the controller and used for achieving three-dimensional detection of lower limb thrombus, and the array detection unit comprises a three-dimensional wrapping assembly and a flexible pipe. The two ends of the flexible pipe are fixedly connected with sliding blocks. Through the design of the wrapping type multi-group array detection units, the device can wrap the lower limbs of a patient in a surrounding manner and is attached to the skin to facilitate real-time lower limb thrombus risk detection, and compared with non-real-time detection equipment which cannot be completely attached to the epidermis in the prior art, the detection real-time performance and accuracy of the device are higher, and the detection efficiency is improved. And moreover, the flexible wrapped scaly structure also avoids the possible injury to the patient caused by the edge of the existing detection device, the gaps of the multiple groups of array detection units also facilitate the ventilation of the skin of the lower limbs of the patient, and the risk of pressure sores is reduced.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, specifically to a real-time detection device for lower extremity thrombosis using multi-source sensor fusion. Background Technology

[0002] Lower extremity thrombosis is a common vascular disease in clinical practice. Early typical symptoms include lower extremity swelling and abnormally increased circumference. Timely monitoring of these physiological and morphological changes, combined with internal tissue imaging, is a core technological requirement for achieving early warning of thrombosis and preventing disease progression and complications. Currently, lower extremity thrombosis detection technology in the medical field mainly revolves around two core objectives: dynamic morphological monitoring of the lower extremities and vascular structural imaging. By acquiring data on changes in lower extremity circumference and ultrasound images, it provides crucial evidence for medical personnel to assess thrombosis risk and is an important component of the vascular disease prevention and treatment system.

[0003] A search revealed Chinese Patent Publication No. CN209450529U, which discloses a lower limb circumference measuring device for thrombosis detection. The device includes a vertical upper limb rod and a lower limb rod. A connecting block is fixed to the upper end of the lower limb rod, and the connecting block has rotating shafts on its left and right sides. A notch penetrating the upper limb rod is provided at the lower end, and mounting holes are provided on the left and right inner walls of the notch. The two rotating shafts on the left and right sides of the connecting block are respectively rotatably fitted into the two mounting holes. This design, through the setting of a first and second measuring scale, allows for easy measurement of the lower limb circumference by simply holding the hand ring and tapping it against the lower limb. The measurement is simple and requires no hands, and the two measuring scales allow for simultaneous measurement of two locations on the lower limb.

[0004] The most critical shortcoming of the existing technology is that the lower limb circumference measuring device can only read intermittent circumference values ​​at specific points, relies on manual operation to complete the measurement and data recording, cannot achieve real-time continuous monitoring of lower limb swelling, and its fitting method is local binding and fixation, which is difficult to adapt to the dynamic changes of the patient's lower limb contour and cannot fully capture the swelling trend of different areas of the lower limb, resulting in insufficient timeliness and completeness of monitoring data, making it difficult to support real-time risk warning of early thrombosis. Summary of the Invention

[0005] The purpose of this invention is to address the problems mentioned in the background section, and consequently, to propose a multi-source sensor fusion-based real-time detection device for lower limb thrombosis. This invention utilizes a wrap-around design with multiple array detection units, allowing the device to surround and conform to the patient's lower limb for real-time detection of lower limb thrombosis risk. Compared to existing non-real-time detection devices and those that cannot fully conform to the skin, this device offers higher real-time performance and accuracy. Furthermore, the flexible, scale-like structure avoids potential harm to the patient from the edges of existing detection devices, and the gaps between the multiple array detection units allow for skin ventilation of the patient's lower limb, reducing the risk of pressure sores.

[0006] The technical solution adopted by this invention to solve its technical problem is: A multi-source sensor fusion real-time detection device for lower extremity thrombosis includes a controller, the upper end of which is provided with an array detection unit for realizing three-dimensional detection of lower extremity thrombosis. The array detection unit includes a three-dimensional wrapping component and a flexible tube. Sliders are fixedly connected to both ends of the flexible tube. A resistance rod is slidably connected to the inner surface of the slider. A housing is fixedly connected to the outer side of the resistance rod. An ultrasonic probe is fixedly connected to the lower end of the housing. A microprocessor is fixedly connected to the end of the resistance rod away from the housing. Anti-collision strips are fixedly connected to both sides of the housing. The three-dimensional wrapping component is located outside the microprocessor.

[0007] Preferably, the three-dimensional wrapping component includes a sleeve, a connecting block slidably connected to the inner surface of the sleeve, a slide rod fixedly connected to one end of the connecting block, a spring fixedly connected to the other end of the connecting block, a slider fixedly connected to the end of the slide rod away from the connecting block, and a tension sensor fixedly connected to the end of the spring away from the connecting block.

[0008] Preferably, the controller is electrically connected to a microprocessor via wires, multiple sets of flexible tubes are fixedly connected to the outer surface of the housing, and a flexible pad is fixedly connected to the inner side of the housing.

[0009] Preferably, the inner surface of the slider has multiple through holes, multiple sets of resistor rods are provided, and the multiple sets of resistor rods are distributed in a circular array around the center of the slider. The inner surface of the flexible tube is provided with cables, and the interior of the shell is hollow.

[0010] Preferably, the outer surface of the housing has multiple through holes, the housing is generally hexagonal, and the upper end of the ultrasonic probe is fixedly connected to the microprocessor.

[0011] Preferably, the sleeve has through holes at both ends, the tail end of the sleeve is fixedly connected to the microprocessor, and the inner surface of the sleeve is slidably connected to the slide rod.

[0012] Preferably, the tail end of the connecting block is elastically connected to the tension sensor via a spring.

[0013] Preferably, the tail end of the tension sensor is fixedly connected to the microprocessor via a wire, and the outer surface of the tension sensor is fixedly connected to the sleeve.

[0014] A real-time detection system for lower extremity thrombosis using multi-source sensor fusion includes a real-time monitoring module, a data processing and fusion module, an ultrasound diagnostic triggering module, and a central control and communication module. Real-time monitoring module: used to collect sensor signals corresponding to changes in the physiological morphology of the lower limbs, including a resistive circumference sensing unit and a tensile force sensing unit: the resistive circumference sensing unit collects electrical signals corresponding to changes in the circumference of the lower limbs; the tensile force sensing unit collects tensile signals corresponding to changes in the wrapping tension caused by swelling of the lower limbs. Data processing and fusion module: Establishes data connections with the real-time monitoring module, the ultrasound diagnostic trigger module and the central control communication module respectively, processes the sensor signals of the real-time monitoring module, generates swelling degree analysis results and controls the start and stop of the ultrasound diagnostic trigger module; Ultrasound diagnostic trigger module: used to acquire lower extremity ultrasound detection data; Central control and communication module: It aggregates the analysis results and ultrasound test data output by the data processing and fusion module, and enables communication with external terminals.

[0015] Preferably, the data processing and fusion module performs comprehensive calculations on the electrical signal of the resistive perimeter sensing unit and the tensile signal of the tensile sensing unit to determine the degree of lower limb swelling. The data processing and fusion module has two ultrasound diagnostic start-up logics: timed triggering and abnormal signal triggering. Timed triggering starts the ultrasound diagnostic trigger module according to a preset cycle, while abnormal signal triggering starts the ultrasound diagnostic trigger module when the change in the sensing signal exceeds a preset threshold.

[0016] Working principle: When using this device, it needs to be completely fitted over the patient's lower limb to be tested. Depending on the patient's leg circumference, the flexible tube will synchronously drive the slider, slide rod, and sleeve to generate relative displacement. At this time, the spring will be pulled, and through its own elastic deformation, the slider and slide rod will tend to move in the opposite direction. This causes the multiple array detection units to tend to move closer together, thus maintaining a tight wrap around the patient's lower limb while being worn, with the wrapping pressure strictly controlled between 10–30 mm. Hg, and considering the different leg circumferences of actual patients, the springs internally installed in this device during production use springs of varying elasticity to maintain a wrap around the patient's lower limbs without causing compression. When the device is activated, if the patient has a risk of lower limb thrombosis, the typical symptom is swelling of the lower limbs. This swelling will cause the housings of multiple array detection units to move away from each other. The flexible tube will then move away from the housings, and through the flexible tube, the slider and resistor rod will move away from each other. Because the flexible tube contains a cable and the slider itself is conductive, the current transmitted to the microprocessor through the flexible tube, slider, and resistor rod will change. The microprocessor will then transmit the corresponding electrical signal change to the controller. The controller transmits risk information to the patient's medical staff via its built-in antenna for early warning. Simultaneously, it performs a preliminary analysis of the degree of lower limb swelling based on changes in current. The microprocessor periodically triggers the internal ultrasound probes when abnormal electrical signals are detected. Multiple array detection units then sequentially activate to perform ultrasound examinations of the patient's lower limbs, independently transmitting the results to the microprocessor. The microprocessor then constructs a three-dimensional ultrasound image and synchronously transmits it to the medical staff via the controller. To ensure accuracy, a tension sensor simultaneously receives tension signals during lower limb swelling and determines the degree of swelling through a comprehensive calculation of abnormal electrical signals and tension signals.

[0017] The present invention has the following beneficial effects: 1. This invention, through its wrap-around design of multiple array detection units, allows the device to wrap around the patient's lower limbs and conform to the skin for real-time detection of lower limb thrombosis risk. Compared with existing non-real-time detection devices and those that cannot fully conform to the epidermis, this invention offers higher real-time performance and accuracy. Furthermore, the flexible, scale-like structure avoids potential harm to the patient from the edges of existing detection devices. The gaps between the multiple array detection units also allow for ventilation of the patient's lower limb skin, reducing the risk of pressure sores.

[0018] 2. This invention utilizes a perimeter sensing structure composed of a resistance rod and a slider, in conjunction with a tension monitoring structure of a force sensor, to achieve dual-dimensional signal acquisition of lower limb morphological changes. Combined with the fusion processing of the dual sensor signals by a microprocessor, the accuracy of swelling degree determination is improved. Furthermore, with the trigger-type imaging structure of the ultrasound probe and the data aggregation and communication structure of the controller, a coherent detection link is formed, encompassing real-time monitoring, precise analysis, imaging confirmation, and remote early warning. This effectively improves the real-time performance and diagnostic reliability of lower limb thrombosis detection, and reduces the risk of missed or false alarms.

[0019] 3. This invention improves the fidelity of the original signal and the anti-interference capability of swelling degree determination by combining high-frequency sampling of the real-time monitoring module and collaborative acquisition by dual sensing units with baseline calibration, filtering preprocessing and weighted fusion algorithm of the data processing fusion module; it avoids probe crosstalk by relying on the timing control logic of the ultrasound diagnostic trigger module to ensure the validity of ultrasound detection data; and it realizes safe and reliable transmission of detection data and three-dimensional ultrasound images through data packet encapsulation and wireless transmission design of the central control communication module. The functions of each module are complementary and highly efficient, providing medical staff with comprehensive and accurate diagnostic basis and improving the timeliness and pertinence of lower extremity thrombosis intervention. Attached Figure Description

[0020] Figure 1 This is a perspective view of the present invention; Figure 2 This is a schematic diagram of the inner side of the housing of the present invention; Figure 3 This is a schematic diagram of the cross-section of the housing of the present invention; Figure 4 This is a schematic diagram of the slider part of the present invention; Figure 5 This is a schematic diagram of the cross-section of the sleeve of the present invention; Figure 6 This is a flowchart of a multi-source sensor fusion real-time detection system for lower extremity thrombosis.

[0021] in: 1. Controller; 2. Array detection unit; 201. Housing; 202. Ultrasonic probe; 203. Anti-collision strip; 204. Flexible tube; 205. Microprocessor; 206. Resistance rod; 207. Slider; 208. Flexible pad; 3. Three-dimensional wrapping component; 301. Slide bar; 302. Connecting block; 303. Sleeve; 304. Tension sensor; 305. Spring. Detailed Implementation

[0022] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] Example: like Figures 1-3 As shown, this embodiment of the invention provides a real-time detection device for lower limb thrombosis using multi-source sensor fusion, including a controller 1, model: STM32H743VI, an industrial-grade microcontroller. Its core functions are to collect data uploaded by various microprocessors 205 and send early warning information and detection reports to external terminals through a built-in antenna. An array detection unit 2 is provided at the upper end of the controller 1 to realize three-dimensional detection of lower limb thrombosis. Through the multi-unit surround layout and collaborative work, it covers the entire circumference of the lower limb detection area and avoids monitoring blind spots. The array detection unit 2 includes a three-dimensional wrapping component 3 and a flexible tube 204. The flexible tube 204 is made of medical-grade silicone with a Shore A hardness of 50A, possessing good flexibility and biocompatibility. It can deform with lower limb movement without compressing the skin, while protecting the internal cables and transmitting the displacement of the slider 207. Slider 207s are fixedly connected to both ends of the flexible tube 204. The slider 207 is made of conductive polyoxymethylene (POM) with added carbon fiber to enhance conductivity and wear resistance, resulting in low sliding resistance and smooth sliding along the resistance rod 206. It transmits mechanical displacement and acts as a conductive medium, ensuring continuous transmission of electrical signals. The resistance rod 206 is slidably connected to the inner surface of the slider 207, and a housing 201 is fixedly connected to the outer side of the resistance rod 206. The housing 201 is made of medical-grade ABS engineering plastic, lightweight and high-strength, providing mounting support for components such as the ultrasound probe 202 and the flexible pad 208, while also isolating external interference and protecting internal components. The ultrasound probe is fixedly connected to the lower end of the housing 201. 202, the ultrasound probe 202 has a detection frequency of 5-10MHz, can penetrate the soft tissue of the lower limbs, and collect ultrasound echo signals of blood vessels and surrounding tissues, providing imaging diagnostic basis for the presence of thrombosis. The end of the resistor rod 206 away from the housing 201 is fixedly connected to the microprocessor 205, model: STM32F407ZGT6, which serves as the local processing core. It is responsible for collecting the electrical signal of the resistor rod 206 and the tension signal of the tension sensor 304 in this unit, performing fusion calculation to determine the degree of swelling, controlling the start and stop of the ultrasound probe 202, processing ultrasound data and constructing a three-dimensional imaging image, and finally uploading the data to the controller 1. The left and right sides of the housing 201 are fixedly connected to the anti-collision strips 203, made of medical silicone rubber with a Shore hardness of 40A, to buffer the collision and impact between the array detection units 2, avoid component wear, and reduce the friction and stimulation of the patient's skin by the edge of the unit. The three-dimensional wrapping component 3 is set outside the microprocessor 205.

[0024] The controller 1 is electrically connected to the microprocessor 205 via wires. These wires are made of PTFE insulated medical shielded wires with a 0.1mm² copper core, providing electromagnetic interference resistance and biocompatibility. This ensures stable electrical signal and power transmission between the controller 1 and the microprocessor 205. Multiple sets of flexible tubes 204 are fixedly connected to the outer surface of the housing 201. These tubes have a silicone sheath and four cores, adapting to device deformation and ensuring signal interconnection between the multiple array detection units 2. The inner surface of the slider 207 has multiple through holes to accommodate resistor rods 206. Multiple sets of resistor rods 206 are arranged in a circular array around the center of the slider 207. The surface of the resistor rods 206 is conductive, and the electrical signal transmitted from the slider 207 is transmitted to the microprocessor 205 via the slider 207 and the resistor rods 206 in the area between the slider 207 and the microprocessor 205. When the relative position between the slider 207 and the microprocessor 205 changes... When the resistance changes, the total resistance of the resistor rod 206 used to transmit electrical signals will change accordingly due to the change in resistance length. The inner surface of the flexible tube 204 is provided with a cable for transmitting electrical signals to the slider 207. The interior of the housing 201 is hollow to facilitate internal wiring and component heat dissipation. Multiple through holes are opened on the outer surface of the housing 201 to accommodate the ultrasound probe 202 and the flexible tube 204 extending out of the housing 201. The housing 201 is generally hexagonal to improve the fit of multiple array detection units 2 when spliced, avoiding monitoring leaks caused by excessive gaps and pressure sores caused by excessive gaps. The upper end of the ultrasound probe 202 is fixedly connected to the microprocessor 205 to ensure that the ultrasound signal is transmitted to the microprocessor 205 quickly and stably. A flexible pad 208 is fixedly connected to the inner side of the housing 201. The material is medical sponge with a density of 30kg / m³, which enhances the fit between the housing 201 and the skin, disperses local pressure, and improves the comfort of wearing for a long time.

[0025] like Figures 3-5As shown, the three-dimensional wrapping component 3 includes a sleeve 303 made of 6061 aluminum alloy, which is lightweight, high-strength, and corrosion-resistant. It provides guidance and installation support for components such as the slide rod 301 and connecting block 302. A connecting block 302 made of polyoxymethylene (POM) is slidably connected to the inner surface of the sleeve 303. POM has good wear resistance and a low coefficient of sliding friction, ensuring accurate and smooth displacement transmission. One end of the connecting block 302 is fixedly connected to the slide rod 301 made of 304 stainless steel with a diameter of 3mm, providing good rigidity and fatigue resistance. This rod synchronously transmits the mechanical displacement of the slider 207 to the connecting block 302. A spring 305 is fixedly connected to the other end of the connecting block 302. The end of the slide rod 301 away from the connecting block 302 is fixedly connected to the slider 207, achieving synchronous displacement between the slider 207 and the connecting block 302. A tension sensor 304 (FUTEK type) is fixedly connected to the end of the spring 305 away from the connecting block 302. The LCM100 miniature tension sensor, with a range of 0-50N, converts the tension change of spring 305 into an electrical signal, which works in conjunction with the electrical signal of resistor rod 206 to improve the accuracy of swelling determination.

[0026] Both ends of the sleeve 303 have through holes to facilitate internal wiring and movement of the slide rod 301. The tail end of the sleeve 303 is fixedly connected to the microprocessor 205 to achieve positioning and fixation of the three-dimensional wrapping component 3. The inner surface of the sleeve 303 is slidably connected to the slide rod 301. The tail end of the connecting block 302 is elastically connected to the tension sensor 304 through the spring 305 to uniformly transmit tension changes to the tension sensor 304. The tail end of the tension sensor 304 is fixedly connected to the microprocessor 205 through a wire. The outer surface of the tension sensor 304 is fixedly connected to the sleeve 303 to achieve installation and positioning of the tension sensor 304.

[0027] like Figure 6 As shown, a multi-source sensor fusion real-time detection system for lower extremity thrombosis includes a real-time monitoring module, a data processing and fusion module, an ultrasound diagnostic triggering module, and a central control and communication module. I. Real-time monitoring module This module is the sensing end of the system, and its core responsibility is to acquire raw physical signals with high fidelity. It consists of a resistive perimeter sensing unit and a tension sensing unit, and utilizes high-frequency sampling... (For example It operates continuously at Hz (100 samples per second) and transmits the raw data stream to the data processing and fusion module in real time.

[0028] 1. Implementation of resistive perimeter sensing unit: The unit utilizes the physical property that lower limb swelling leads to an increase in leg circumference. This is achieved by... As the leg circumference at time t increases, the effective resistance length of the potentiometer or sensor changes through a mechanical transmission structure such as a slider and a resistance rod. This results in the output of the original electrical signal. (The original resistance signal at time t) and leg circumference It exhibits a specific functional relationship and can be approximately expressed linearly as follows: ,in (Resistance sensing coefficient) is the sensitivity of the sensor. (Resistor signal bias) is the inherent bias of the circuit.

[0029] 2. Implementation of the tension sensing unit: This unit is used to monitor changes in tension applied to the wrapping device due to lower limb swelling. This is achieved by using a tension sensor to measure the tension on the wrapping straps or springs. The tension (the original tension signal at time t). Swelling causes tissue expansion, increasing the distance between the flexible tube and the microprocessor, and consequently increasing the distance between the slider and the tension sensor. At this point, the spring will pull the tension sensor, increasing the tension. As it increases, the signal With applied pressure (The package pressure at time t) is directly related. ,in (Tension sensing coefficient) is the sensitivity of the sensor. (Tension signal bias) is the zero-point bias of the sensor.

[0030] II. Data Processing and Fusion Module This module is the brain of the system, responsible for processing, analysis, decision-making, and control. It receives raw data from the real-time monitoring module and engages in bidirectional data exchange with the ultrasound diagnostic trigger module and the central control communication module.

[0031] 1. Initialize baseline calibration: At system startup (first time the patient wears the device) Time period (e.g.) Within seconds, this module performs baseline calibration to determine the patient's normal state; this step calculates... and The mean value during this period will be used as the benchmark for subsequent comparisons. (Resistance reference value) and (Tension reference value), the calculation formula is as follows:

[0032]

[0033] in (Number of calibration sampling points) is in Within a time ( The total number of sample points collected.

[0034] 2. Signal preprocessing: raw signal and The signal contains noise. The module uses a digital filter (such as a moving average filter) to smooth the signal and improve the signal-to-noise ratio. The processed signal... (Filtered resistance signal) and The filtered tension signal is calculated as follows:

[0035]

[0036] in (Filter window size) is the number of sampling points used for averaging, for example .

[0037] 3. Swelling degree analysis: This step is the core of realizing multi-source sensor fusion. The module first calculates the current filtered signal. and Relative to the baseline value and normalized variables (Normalized resistance change) and (Normalized change in tensile force):

[0038]

[0039] in (Upper limit of resistance range) and (Upper limit of tensile force range) is the maximum effective reading of the sensor. Subsequently, the module executes a weighted fusion algorithm to calculate the final swelling degree analysis result. (Degree of swelling at time t):

[0040] in (Resistor signal weights) and (Tension signal weight) is the fusion weighting coefficient. .For example, The weighting of changes in perimeter is slightly higher than that of changes in tension. This comprehensive calculation ensures that changes only occur when both perimeter and tension change significantly. Only then can a high value be achieved, effectively avoiding false alarms caused by a single sensor (such as when patient movement only causes a change in tension).

[0041] 4. Ultrasound Diagnosis Startup Logic Control: This module is based on... The results and internal clock enable two logics: timed triggering and exception signal triggering, to generate Boolean values. (Ultrasound trigger signal, 1 for trigger, 0 for no trigger) and send it to the ultrasound diagnostic trigger module.

[0042]

[0043] in (Current timestamp) is the system's current time; (Last trigger timestamp) records the last time The time is 1; (Timed trigger cycle) is a preset routine check cycle (e.g., 4 hours). (Abnormal swelling threshold) is used to determine acute swelling. A threshold (e.g., 0.8). If any condition is met, then... Set to 1.

[0044] 5. Three-dimensional ultrasound imaging image processing: After the ultrasound diagnostic trigger module completes data acquisition, it will process multiple sets (assuming...) Group 2D ultrasound detection data ( The module transmits a set of 2D ultrasound image slices back to this module, which utilizes known... Spatial position and orientation information of the ultrasonic testing unit (The three-dimensional coordinates and orientation vectors of each probe) are used to execute a three-dimensional reconstruction algorithm (such as voxel interpolation) to process these discrete 2D slice data. Combined into a 3D voxel dataset (Three-dimensional ultrasound imaging image), that is:

[0045] in These are coordinates in three-dimensional voxel space. It is a reconstruction algorithm. A complete three-dimensional ultrasound image of the lower limb detection area was obtained.

[0046] III. Ultrasound Diagnostic Trigger Module This module is the execution unit for high-precision diagnostics. It switches between standby and working states, entirely dependent on the data processing and fusion module. Signal control; 1. Receiving trigger commands: The module continuously listens for trigger commands from module two. Signal. when The module is activated when it changes from 0 to 1; 2. Start sequential and collaborative scanning: To avoid Group of ultrasonic testing units To prevent ultrasonic crosstalk between the i-th ultrasonic testing unit, this module must execute sequential startup timing control logic, generating a timing control signal internally. (Timing control signal), this signal is used for a short period of time. Within (total scan time), in sequence Activate and deactivate each one in sequence :

[0047] AcquireData( The (data acquisition function) instructs the i-th probe to perform one scan and acquire its corresponding 2D image data. (2D image of the i-th probe); 3. Data feedback: In After all scans are completed, this module will collect the data. Group of 2D ultrasound detection data As a complete dataset, it is transmitted back to the data processing and fusion module for 3D reconstruction.

[0048] IV. Central Control Communication Module This module is the system's external interface, responsible for securely and reliably sending critical diagnostic and analysis results to healthcare workers' terminals.

[0049] 1. Data aggregation and encapsulation: This module receives two types of key information from the data processing and fusion module: (1) Analysis results of the degree of persistent swelling .

[0050] (2) Triggered three-dimensional ultrasound imaging images (This is only generated when ultrasound is triggered).

[0051] This module encapsulates this data into predefined data packets. (Transmitting data packets), the data packets must contain at least:

[0052] in (Patient ID) is a unique patient identifier; (Timestamp) is the current data time; (Ultrasound flag) is a Boolean value used to indicate whether the current transmission contains valid data. Data (if) ,but (Field is empty).

[0053] Remote communication implementation: This module utilizes a built-in antenna and wireless communication chip (such as NB-IoT, LoRa, or 5G) to enable communication with external (medical personnel) terminals.

[0054] In the description of this invention, the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "vertical," and "horizontal," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only to describe the invention and not to require the invention to be constructed or operated in a specific orientation; therefore, they should not be construed as limitations on the invention. The terms "connected" and "linked" in this invention should be interpreted broadly. For example, they can refer to a connection or a detachable connection; they can refer to a direct connection or an indirect connection through intermediate components. Those skilled in the art can understand the specific meaning of the above terms based on the specific circumstances.

[0055] The above description represents the preferred mode of operation of the present invention. The specific operational modes are provided solely for a better understanding of the invention's concept. Those skilled in the art can make various improvements or equivalent substitutions based on the principles of this invention, and these improvements or equivalent substitutions are also considered to fall within the scope of protection of this invention.

Claims

1. A real-time detection device for lower extremity thrombosis using multi-source sensor fusion, comprising a controller (1), characterized in that: The upper end of the controller (1) is provided with an array detection unit (2) for realizing three-dimensional detection of lower limb thrombosis; The array detection unit (2) includes a three-dimensional wrapping component (3) and a flexible tube (204). Both ends of the flexible tube (204) are fixedly connected to sliders (207). A resistance rod (206) is slidably connected to the inner surface of the slider (207). A housing (201) is fixedly connected to the outer side of the resistance rod (206). An ultrasonic probe (202) is fixedly connected to the lower end of the housing (201). A microprocessor (205) is fixedly connected to the end of the resistance rod (206) away from the housing (201). Anti-collision strips (203) are fixedly connected to both the left and right sides of the housing (201). The three-dimensional wrapping component (3) is located outside the microprocessor (205).

2. The multi-source sensor fusion real-time detection device for lower extremity thrombosis according to claim 1, characterized in that: The three-dimensional wrapping component (3) includes a sleeve (303), a connecting block (302) is slidably connected to the inner surface of the sleeve (303), a slide rod (301) is fixedly connected to one end of the connecting block (302), a spring (305) is fixedly connected to the other end of the connecting block (302), the end of the slide rod (301) away from the connecting block (302) is fixedly connected to the slider (207), and a tension sensor (304) is fixedly connected to the end of the spring (305) away from the connecting block (302).

3. The multi-source sensor fusion real-time detection device for lower extremity thrombosis according to claim 1, characterized in that: The controller (1) is electrically connected to a microprocessor (205) via wires. Multiple sets of flexible tubes (204) are fixedly connected to the outer surface of the housing (201), and a flexible pad (208) is fixedly connected to the inner side of the housing (201).

4. The multi-source sensor fusion real-time detection device for lower extremity thrombosis according to claim 1, characterized in that: The inner surface of the slider (207) has multiple through holes, the resistor rod (206) has multiple sets, and the multiple sets of resistor rods (206) are arranged in a circular array around the center of the slider (207). The inner surface of the flexible tube (204) is provided with cables, and the interior of the shell (201) is hollow.

5. The multi-source sensor fusion real-time detection device for lower extremity thrombosis according to claim 1, characterized in that: Multiple through holes are provided on the outer surface of the housing (201). The housing (201) is generally hexagonal. The upper end of the ultrasonic probe (202) is fixedly connected to the microprocessor (205).

6. The multi-source sensor fusion real-time detection device for lower extremity thrombosis according to claim 2, characterized in that: The sleeve (303) has through holes at both ends. The tail end of the sleeve (303) is fixedly connected to the microprocessor (205). The inner surface of the sleeve (303) is slidably connected to the slide rod (301).

7. The multi-source sensor fusion real-time detection device for lower extremity thrombosis according to claim 2, characterized in that: The tail end of the connecting block (302) is elastically connected to the tension sensor (304) via a spring (305).

8. The multi-source sensor fusion real-time detection device for lower extremity thrombosis according to claim 2, characterized in that: The tail end of the tension sensor (304) is fixedly connected to the microprocessor (205) via a wire, and the outer surface of the tension sensor (304) is fixedly connected to the sleeve (303).

9. A real-time detection system for lower extremity thrombosis using multi-source sensor fusion, characterized in that: It includes a real-time monitoring module, a data processing and fusion module, an ultrasound diagnostic triggering module, and a central control and communication module. The real-time monitoring module includes the array detection unit (2) as described in claim 8. Real-time monitoring module: used to collect sensor signals corresponding to changes in the physiological morphology of the lower limbs, including a resistive circumference sensing unit and a tensile force sensing unit: the resistive circumference sensing unit collects electrical signals corresponding to changes in the circumference of the lower limbs; the tensile force sensing unit collects tensile signals corresponding to changes in the wrapping tension caused by swelling of the lower limbs. Data processing and fusion module: Establishes data connections with the real-time monitoring module, the ultrasound diagnostic trigger module and the central control communication module respectively, processes the sensor signals of the real-time monitoring module, generates swelling degree analysis results and controls the start and stop of the ultrasound diagnostic trigger module; Ultrasound diagnostic trigger module: used to acquire lower limb ultrasound detection data; Central control and communication module: It aggregates the analysis results and ultrasound test data output by the data processing and fusion module, and enables communication with external terminals.

10. A real-time detection system for lower extremity thrombosis based on multi-source sensor fusion according to claim 9, characterized in that: The data processing and fusion module performs comprehensive calculations on the electrical signal from the resistive perimeter sensing unit and the tensile signal from the tensile sensing unit to determine the degree of lower limb swelling. The data processing and fusion module has two ultrasound diagnostic start-up logics: timed triggering and abnormal signal triggering. Timed triggering starts the ultrasound diagnostic trigger module according to a preset cycle, while abnormal signal triggering starts the ultrasound diagnostic trigger module when the change in the sensing signal exceeds a preset threshold.

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