Multi-board division cooperative control system based on blood purification equipment

Abstract

The invention relates to a multi-board division cooperative control system based on blood purification equipment, which comprises a man-machine interaction unit, a liquid balance unit, a blood loop unit, a blood anticoagulation unit and a power supply unit, each unit is an operation unit with independent hardware, is provided with an independent PCB (Printed Circuit Board) and an independent DCDC (Direct Current-Direct Current) circuit, and performs data interaction through a custom protocol on a CAN (Controller Area Network) bus. The man-machine interaction unit receives user input and displays an equipment state; the liquid balance unit adjusts liquid input and output in the purification process; the blood loop unit is used for establishing and maintaining in-vitro blood circulation; the blood anticoagulation unit controls the injection of an anticoagulant; and the power supply unit provides power support for each module. Each unit operates independently, and only a single unit needs to be replaced when a fault occurs, so that the reliability and the maintenance efficiency of the system are improved. According to the system, modularization and efficient cooperation are achieved through distributed design, and it is ensured that equipment operates stably and safely in the blood purification process.

Description

Technical Field

[0001] The present invention relates to the technical field of data processing, and in particular to a multi-board division of labor and collaborative control system based on a blood purification device. Background Art

[0002] In the control system design of blood purification equipment, the traditional architecture often relies on the main control CPU to receive and process the sensor data from each module. These modules are simple in design and are mainly responsible for data collection and transmission, but rarely involve specific business logic processing. The original intention of this design was to simplify the workload of each module and concentrate computing resources on the main control CPU for unified management and control. However, as the functions of the equipment become more complex, the main control CPU gradually faces the problem of task overload, especially when processing huge data and complex control logic, the limitations of this architecture become more and more obvious.

[0003] Since the main control CPU is responsible for all data processing and business logic, the processing tasks become complicated and easily lead to performance bottlenecks. Once there is a problem with data processing, such as abnormal sensor data or communication interruption, the working efficiency of the main control CPU may be greatly reduced, and even cause the system to respond slowly. More seriously, when an error occurs in the main control CPU, since it is responsible for all core tasks, the entire system may fall into a downtime state, causing the blood purification process to be interrupted, which poses a severe challenge to the safety and reliability of the equipment.

[0004] There is currently no solution to the technical problem that this centralized control architecture lacks sufficient redundancy and adaptability when encountering failures, and the system has low risk resistance. Summary of the invention

[0005] The main purpose of the present invention is to provide a multi-board division of labor and collaborative control system based on blood purification equipment to solve the technical problems that the centralized control architecture lacks sufficient redundancy and adaptability when encountering a failure, and the system has low risk resistance.

[0006] To achieve the above objectives, the present invention provides a multi-board division of labor and collaborative control system based on a blood purification device, including: a human-computer interaction unit, a liquid balance unit, a blood circuit unit, a blood anticoagulation unit, a power supply unit and a CAN bus. The details are as follows: The human-machine interaction unit is connected to the CAN bus for receiving operation instructions and parameter settings input by the user, and displaying the operation status and processing data of the device; The liquid balance unit is communicatively connected to the CAN bus and is used to monitor and adjust the input and output of liquid during the blood purification process in real time to control the ultrafiltration rate and the amount of fluid replacement; The blood circuit unit is communicatively connected to the CAN bus and is used to establish and maintain an extracorporeal blood circulation circuit to achieve drainage and reinfusion of the patient's blood; The blood anticoagulation unit is communicatively connected to the CAN bus and is used to inject anticoagulant into the blood circuit during the blood purification process to prevent blood from coagulating in the extracorporeal circulation system; The power board is communicatively connected to the CAN bus and is used to provide power support for the human-machine interaction unit, the liquid balance unit, the blood circuit unit and the blood anticoagulation unit.

[0007] In summary, the multi-board division of labor and collaborative control system based on the blood purification equipment provided by the present invention realizes the distributed control and collaborative work of the system by designing each functional unit as a hardware-independent computing unit with an independent PCB board and DCDC circuit, and performing data interaction through the CAN bus and a custom protocol. This design not only effectively solves the performance bottleneck problem of the traditional centralized control architecture when processing complex tasks, but also significantly improves the risk resistance and fault tolerance of the system. The independent operation of each unit can not affect the normal operation of other units when a single unit fails. The overall function of the system can be restored by replacing the faulty unit, thereby improving the maintenance efficiency and operational reliability of the equipment. In addition, through efficient data transmission and modular design on the CAN bus, the present invention can ensure the safety, stability and efficiency of the blood purification process, so that the equipment can operate continuously and reliably in a complex and changeable medical environment, meeting the high requirements of modern medical equipment for safety, reliability and maintainability. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 It is a schematic diagram of a multi-board division of labor and collaborative control system based on a blood purification device in one embodiment of the present invention; Figure 2 It is a schematic diagram of another multi-board division of labor and collaborative control system based on a blood purification device in one embodiment of the present invention.

[0009] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0010] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0011] Reference Figure 1The embodiment of the present invention provides a multi-board division of labor and collaborative control system based on a blood purification device, including: a human-computer interaction unit 1, a liquid balance unit 2, a blood circuit unit 3, a blood anticoagulation unit 4, a power supply unit 5 and a CAN bus 6. The details are as follows: The human-machine interaction unit 1 is connected to the CAN bus 6 for receiving operation instructions and parameter settings input by the user, and displaying the operation status and processing data of the device; The liquid balance unit 2 is communicatively connected to the CAN bus 6 and is used to monitor and adjust the input and output of liquid during the blood purification process in real time to control the ultrafiltration rate and the amount of fluid replacement; The blood circuit unit 3 is communicatively connected with the CAN bus 6 and is used to establish and maintain an extracorporeal blood circulation circuit to achieve drainage and reinfusion of the patient's blood; The blood anticoagulation unit 4 is communicatively connected to the CAN bus 6 and is used to inject anticoagulants into the blood circuit during the blood purification process to prevent blood from coagulating in the extracorporeal circulation system; The power board is communicatively connected to the CAN bus 6 and is used to provide power support for the human-machine interaction unit 1 , the liquid balance unit 2 , the blood circuit unit 3 and the blood anticoagulation unit 4 .

[0012] In the design of traditional blood purification equipment control systems, the main control CPU is usually assigned the important task of receiving and processing sensor data from each module. The design of these modules is relatively simple, mainly responsible for data collection and transmission, and less involved in specific business logic processing. The original intention of such an architecture is to simplify the workload of each module and concentrate computing resources on the main control CPU for unified management and control. However, with the increasing complexity of equipment functions, the main control CPU gradually faces the problem of task overload, especially when it needs to process large amounts of data and complex control logic, the limitations of this centralized architecture become more and more obvious.

[0013] Since the main control CPU is responsible for all data processing and business logic, its processing tasks become complicated and easily lead to performance bottlenecks. If there is a problem in data processing, such as abnormal sensor data or communication interruption, the working efficiency of the main control CPU may be greatly reduced, and even cause the system to respond slowly. What is more serious is that when the main control CPU fails, since it undertakes all core tasks, the entire system may fall into a downtime state. This is extremely dangerous in the blood purification process, because equipment interruption may directly affect the patient's life safety. These problems pose severe challenges to the safety and reliability of the equipment, and the existing centralized control architecture lacks sufficient redundancy and adaptability when encountering failures. The system's risk resistance is low and there is no effective solution yet.

[0014] In view of the above technical problems, the present invention provides a multi-board division of labor and collaborative control system based on a blood purification device. The system includes a human-computer interaction unit 1, a liquid balance unit 2, a blood circuit unit 3, a blood anticoagulation unit 4, a power supply unit 5 and a CAN bus 6. Each unit is hardware independent, with an independent PCB board and DCDC circuit, and they interact with each other through a custom protocol on the CAN bus 6.

[0015] In terms of human-computer interaction, the unit is responsible for receiving the user's input of operation instructions and parameter settings, and displaying the device's operating status and processing data. For example, the user can set the parameters of blood purification through the touch screen and view real-time blood flow rate, pressure and other information. When the treatment plan needs to be adjusted, the user can operate directly on the interface, and the system will respond immediately.

[0016] The liquid balance unit 2 is used to monitor and adjust the input and output of the liquid in the blood purification process in real time to control the ultrafiltration rate and the amount of fluid replacement. It contains multiple components such as liquid pumps and weighing modules. For example, during the treatment process, the ultrafiltration rate needs to be accurately controlled to prevent excessive loss of fluid in the patient's body. The liquid balance unit 2 can automatically adjust the working state of the liquid pump according to the real-time data provided by the weighing module to ensure liquid balance.

[0017] The blood circuit unit 3 is responsible for establishing and maintaining the extracorporeal blood circulation circuit to achieve the drainage and reinfusion of the patient's blood. It includes components such as a blood pump and a blood sensor. For example, the blood pump maintains the stable flow of blood in the extracorporeal circulation system, while the blood sensor monitors the blood flow rate and pressure in real time. When an abnormal blood flow rate is detected, the blood circuit unit 3 can notify other units through the CAN bus 6 for collaborative processing.

[0018] The blood anticoagulation unit 4 injects anticoagulants into the blood circuit during the blood purification process to prevent the blood from coagulating in the extracorporeal circulation system. It includes components such as an anticoagulant pump and a concentration monitor. For example, according to the coagulation of the blood, the anticoagulant pump will accurately control the injection speed and dosage of the anticoagulant to ensure that the blood maintains good fluidity in the extracorporeal circulation. The power supply unit 5 provides power support for the above-mentioned units to ensure the stable operation of the system.

[0019] This multi-board division of labor and collaborative control system design effectively solves the problem of master CPU overload in traditional architecture. Since each unit has independent processing capabilities and hardware structure, they can independently complete their own business logic processing without relying too much on the master CPU. This distributed control method improves the processing efficiency and reliability of the system.

[0020] For example, if the blood circuit unit 3 detects a decrease in blood flow rate, it can immediately transmit this information to the liquid balance unit 2 and the human-machine interface unit 1 through the CAN bus 6. The liquid balance unit 2 can adjust the liquid input and output according to the situation, while the human-machine interface unit 1 can prompt medical staff to check the patient's status. This real-time information sharing and collaborative control ensures that the system can maintain stable operation under abnormal conditions.

[0021] In addition, the independent hardware design of each unit improves the maintainability of the system. When a unit has hardware damage, only the corresponding single unit needs to be replaced without affecting the normal operation of other units. This not only reduces maintenance costs, but also improves maintenance efficiency. For example, if the hardware of liquid balance unit 2 fails, only the PCB board and related components of liquid balance unit 2 need to be replaced, without stopping the entire system to replace it.

[0022] By using a custom communication protocol on the CAN bus 6, data exchange between the various units is more efficient and reliable. The custom protocol can be optimized according to the specific needs of the system to ensure the real-time and accuracy of data transmission. For example, in the blood purification process, data delays or errors may lead to serious consequences, so the reliability of the communication protocol is crucial.

[0023] In summary, the multi-board division of labor and collaborative control system of the present invention realizes modularization, distributed control and high reliability of the system through multiple hardware-independent computing units and a customized CAN bus 6 communication protocol. This design effectively avoids the performance bottleneck of the main control CPU, improves the risk resistance and maintainability of the system, solves the technical problems of the traditional centralized control architecture under the background of complex functions, and provides a strong guarantee for the safe and efficient operation of blood purification equipment.

[0024] In one example, the human-computer interaction unit 1 further includes at least one of the following: a touch screen, a microphone, a camera, and a card reader. The human-computer interaction unit 1 receives the user's touch instructions and the operation information and processing data of the display device through the touch screen, receives the user's voice instructions through the microphone, and reads the user's identity information or medical card data through the card reader.

[0025] In this example, the human-computer interaction unit 1 serves as the interactive interface between the user and the device in the blood purification device, and is responsible for receiving user instructions, displaying device status, and processing data. In order to enhance the convenience and flexibility of interaction, the unit may include multiple input and output devices, namely: a touch screen, a microphone, a camera, and a card reader.

[0026] As the most common human-computer interaction method, the touch screen allows users to directly input operating instructions by touching the screen, such as adjusting blood purification parameters, checking treatment progress, etc. At the same time, the touch screen also displays the real-time operation information and processing data of the device to help users understand the current blood purification status, such as blood flow rate, pressure, ultrafiltration rate and other key information. The microphone is able to receive the user's voice instructions, which enables the device to support voice control. This is especially important for medical operations because it can achieve hands-free operation when the user's hands are occupied, or quickly input instructions by voice in an emergency. For example, medical staff can issue operating commands by voice without touching the device, thereby improving work efficiency.

[0027] The camera can be used for image recognition or video calls. For example, it can help record the operation process, or be used for video communication with remote experts, providing real-time equipment status or patient information for remote diagnosis or assistance. The card reader allows the device to obtain identity information or medical history data by reading the user's identity card or medical card. For example, medical staff can quickly retrieve the patient's historical treatment records by swiping the card, or the patient can authorize the device operation through his or her own medical card. This method simplifies the operation of the device while also improving security and the ability to provide personalized services.

[0028] Overall, this multifunctional human-computer interaction unit 1 design provides a more intuitive, convenient and safe operating experience, making the use of blood purification equipment more humane and intelligent, and adapting to the modern medical equipment's requirements for efficient, safe and flexible operation.

[0029] In one example, the liquid balance unit 2 also includes: multiple liquid pumps, multiple pinch valves, front and rear dilution switching valves, a weighing module, an air valve, and an air pump. The multiple liquid pumps are used to control the delivery and recovery of the liquid and adjust the flow and pressure of the liquid; the pinch valve is used to open and close the liquid pipeline to achieve the switching and cutoff of the liquid flow direction; the front and rear dilution switching valve is used to switch between the front dilution and post dilution modes and adjust the addition position of the diluent; the weighing module is used to monitor the weight change of the liquid in real time and provide accurate liquid balance data; the air valve and the air pump are used to generate and adjust the air pressure inside the system, assist the delivery and discharge of the liquid, and prevent the formation and retention of bubbles.

[0030] In this example, the liquid balance unit 2 is responsible for real-time monitoring and regulation of the input and output of liquids during the blood purification process, ensuring accurate control of the ultrafiltration rate and the amount of fluid replacement. The unit contains several key components, including: liquid pump, clamp valve, front and rear dilution switching valve, weighing module, air valve and air pump. Each component plays a specific role in the liquid management process.

[0031] The function of multiple liquid pumps is to control the delivery and recovery of liquids within the equipment. They can accurately adjust the flow rate and pressure of the liquid to ensure the stable flow of liquid during the blood purification process. For example, during the ultrafiltration process, the liquid pump can adjust the discharge rate of plasma water to ensure that the patient's body water is maintained at a reasonable level. The pinch valve is used to open and close the liquid pipeline, allowing the system to switch the flow direction of the liquid or cut off the flow of the liquid as needed. By controlling the opening and closing of the pinch valve, the system can effectively manage the input and output of different liquids. For example, when the system needs to switch the liquid from one liquid storage bag to another, the pinch valve can achieve this function by closing and opening the pipeline.

[0032] The pre-dilution switching valve is used to switch between pre-dilution and post-dilution modes, which is related to the process of adding replacement fluid in blood purification. Pre-dilution refers to adding replacement fluid before the blood enters the filter, while post-dilution is adding replacement fluid after the blood is filtered. Through this switching valve, the device can flexibly adjust the addition position of the replacement fluid according to treatment needs to optimize the effect of blood purification.

[0033] The weighing module is another important component that monitors the weight change of the liquid in real time. The module can accurately track the amount of input and output fluids to ensure the accuracy of the fluid balance data. For example, through the weighing module, the device can calculate the total amount of fluid discharged during the ultrafiltration process in real time and ensure that the amount of fluid replacement matches the patient's needs to avoid excessive or insufficient fluid replacement.

[0034] Air valves and air pumps are responsible for regulating the air pressure within the system to assist in the delivery and discharge of liquids. By regulating the air pressure, these components can help the liquid flow more efficiently, especially when precise control of pressure and flow is required. In addition, air pumps can also be used to prevent the formation and retention of bubbles. Bubbles are very dangerous in the blood circulation system. They can cause air embolism and coagulation, so keeping the liquid flowing without bubbles is crucial to the safety of the equipment and the health of the patient.

[0035] In summary, the liquid balance unit 2 ensures stable, accurate and safe liquid flow during the blood purification process by coordinating multiple liquid pumps, valves, weighing modules and air pressure control devices. The independent functions of each component work together to ensure the accuracy of liquid management, thereby providing patients with an efficient and safe treatment experience. For example, the liquid pump and the clamp valve can be coordinated according to real-time weighing data, while the air pump ensures that no bubbles are generated during the liquid delivery process. This combined design not only improves the reliability of the equipment, but also makes it perform better in complex treatment processes.

[0036] In one example, the blood circuit unit 3 includes: a blood pump, a blood sensor, an air detector and a temperature regulator; the blood pump is used to drive the flow of blood in the extracorporeal circulation system to maintain a stable blood flow; the blood sensor is used to monitor the blood flow rate, pressure and blood oxygen saturation in real time and provide feedback on blood parameters; the air detector is used to detect bubbles in the blood circuit to prevent air embolism and coagulation; the temperature regulator is used to control the temperature of the blood to ensure that the temperature of the returned blood meets physiological requirements.

[0037] In this example, the blood circuit unit 3 is a crucial part of the blood purification device, responsible for maintaining the circulation of extracorporeal blood, monitoring key blood parameters, ensuring blood safety, and regulating blood temperature. The unit consists of multiple core components, including a blood pump, a blood sensor, an air detector, and a temperature regulator, each of which has a specific function to ensure the smooth progress of the blood purification process.

[0038] The main function of a blood pump is to drive the flow of blood in the extracorporeal circulation system. Blood is introduced from the patient's body into the extracorporeal circuit through a catheter, and then returned to the body after purification. The blood pump is responsible for maintaining the stability of this circulation, ensuring that the blood continues to flow and the flow rate is moderate. If the blood flow is too large or too small, it may affect the purification effect or the safety of the patient, so the blood pump needs to be highly precise when controlling the blood flow. For example, in some cases, the doctor may need to adjust the blood flow according to the patient's weight or condition, and the blood pump can achieve these adjustments through precise control.

[0039] Blood sensors are used to monitor multiple key parameters of the blood in real time, such as flow rate, pressure, and blood oxygen saturation. These data are critical to ensuring the safety and effectiveness of the blood purification process. For example, if the blood flow rate is too low, it may lead to a decrease in purification efficiency, while too high a flow rate may burden the patient's blood vessels. The sensor also monitors the pressure in the blood, and if abnormal pressure fluctuations are found, the system can make timely adjustments. In addition, the blood oxygen saturation sensor can help monitor the oxygen content in the patient's blood to ensure the patient's physiological stability during the purification process.

[0040] The function of the air detector is to detect bubbles in the blood circuit. Bubbles in the blood circulation may cause air embolism, which is a very dangerous situation that may cause blood vessel blockage and even threaten the patient's life. The air detector can quickly identify tiny bubbles in the blood through optical or ultrasonic technology. Once bubbles are detected, the system will sound an alarm or automatically take measures, such as suspending blood circulation or triggering a bubble removal device. In this way, the air detector adds a safety guarantee to the blood purification process.

[0041] Finally, the temperature regulator is responsible for controlling the temperature of the blood, ensuring that the temperature of the blood returned to the patient meets physiological requirements. The temperature of human blood is usually maintained at around 37°C, but during extracorporeal circulation, the blood temperature may drop due to the influence of the environment and equipment. The temperature regulator can monitor the blood temperature in real time and heat or cool the blood as needed to ensure that the temperature of the blood is close to the patient's body temperature when it is returned. This is very important for maintaining the patient's physiological stability, especially during the long-term blood purification process, where the regulation of blood temperature can prevent the patient from hypothermia or other abnormal body temperature.

[0042] In summary, the blood circuit unit 3 drives the blood flow through the blood pump, the blood sensor monitors the flow rate, pressure and blood oxygen saturation, the air detector prevents the formation and entry of bubbles, and the temperature regulator controls the blood temperature, making the entire extracorporeal blood circulation process safe, stable and efficient. The coordinated work of each component not only ensures the normal function of the blood purification equipment, but also provides a strong guarantee for the safety and comfort of the patient. For example, if bubbles are detected in the blood during the purification process, the system can respond immediately, and the temperature regulator ensures that the blood will not cool down due to external conditions, thereby effectively reducing the risk of equipment operation.

[0043] In one example, the blood anticoagulation unit 4 includes: an anticoagulant pump, an anticoagulant storage container, and an anticoagulant concentration monitor; the anticoagulant pump is used to accurately control the injection speed and dosage of the anticoagulant; the anticoagulant storage container is used to store the anticoagulant solution to maintain a stable supply of anticoagulant; the anticoagulant concentration monitor is used to detect the concentration of the anticoagulant to ensure the reliability of the anticoagulant effect.

[0044] In this example, the blood anticoagulation unit 4 is an important part of the blood purification device, which is responsible for preventing blood coagulation during extracorporeal blood circulation, ensuring that the blood can flow smoothly and be purified. The unit mainly includes an anticoagulant pump, an anticoagulant storage container and an anticoagulant concentration monitor, which work together to control the supply and concentration of the anticoagulant to ensure the stability and safety of the anticoagulant effect.

[0045] The main function of the anticoagulant pump is to accurately control the injection speed and dosage of the anticoagulant. In the extracorporeal blood circulation system, since blood is prone to coagulation after leaving the human body, anticoagulants, such as heparin, need to be continuously injected into the blood circuit to prevent blood coagulation. The anticoagulant pump ensures that the anticoagulant is injected into the blood circuit at the set speed and dosage through precise metering control. It is crucial to control the injection amount of the anticoagulant, because too little dosage may cause blood coagulation, affect blood circulation, and even cause equipment blockage; while too much dosage may increase the risk of bleeding in patients. Therefore, precise control of the anticoagulant pump is the core of ensuring safe treatment.

[0046] Next, the anticoagulant storage container is used to store the anticoagulant solution and maintain a steady supply of anticoagulant. During the blood purification process, the equipment needs to continuously provide anticoagulant, so a storage container is necessary to hold the anticoagulant solution. The capacity and sealing design of the container ensure an adequate supply of anticoagulant and can maintain the stability and effectiveness of the anticoagulant solution. The sealing performance of the container can prevent the anticoagulant from being contaminated or deteriorating during storage, ensuring that the quality of the anticoagulant remains consistent throughout the purification process.

[0047] The anticoagulant concentration monitor is responsible for detecting the concentration of the anticoagulant to ensure the reliability of the anticoagulant effect. During the blood purification process, the concentration of the anticoagulant directly affects its anticoagulant effect. If the anticoagulant concentration is insufficient, the blood may coagulate during extracorporeal circulation, resulting in interruption of the equipment operation; if the anticoagulant concentration is too high, the patient's coagulation function may be inhibited, increasing the risk of bleeding. The anticoagulant concentration monitor detects the concentration of the anticoagulant in real time to ensure that it remains within a reasonable range, and automatically adjusts the injection amount of the anticoagulant based on the monitoring data. This real-time monitoring and adjustment mechanism can effectively prevent any deviations in the use of anticoagulants, ensuring smooth blood flow and the safety of treatment.

[0048] For example, during a blood purification treatment, if the anticoagulant concentration monitor detects that the anticoagulant concentration is lower than the preset value, the system will automatically notify the anticoagulant pump to increase the injection speed to replenish the anticoagulant and ensure that the blood does not coagulate. Similarly, if the concentration is too high, the system will reduce the injection of anticoagulants to avoid unnecessary risks to the patient.

[0049] In summary, the blood anticoagulation unit 4 accurately controls the injection amount of anticoagulant through the anticoagulant pump, the anticoagulant storage container ensures a stable supply of anticoagulant, and the anticoagulant concentration monitor is responsible for monitoring the concentration and adjusting it in real time, ensuring that the entire anticoagulation process is safe, reliable and highly accurate. This multi-level control mechanism not only improves the automation level of the equipment, but also provides reliable protection for anticoagulation management during the blood purification process.

[0050] In one example, the system further includes: an alarm unit, which is used to issue an alarm prompt when the system operates abnormally or the parameters exceed the safety range, so as to remind medical staff to handle it in time.

[0051] In this example, the main function of the alarm unit is to sound an alarm when the system is operating abnormally or certain parameters are out of the safe range. During the operation of the equipment, various abnormal situations may be encountered, such as abnormal liquid flow, excessive pressure, insufficient anticoagulant concentration, or interruption of internal communication in the system. At this time, the alarm unit will determine whether the equipment has exceeded the safe range based on the real-time data from each unit. Once an abnormality is detected, the alarm unit will immediately send out a sound or light signal, and in some advanced equipment, it will even send a text message or notify medical staff through the network.

[0052] This alarm mechanism is crucial to ensure the safety of the device. For example, if the fluid balance unit 2 detects an imbalance in fluid input and output, it may trigger the alarm unit to indicate that the ultrafiltration rate is too high. The system will use an alarm to remind medical staff to take prompt measures to prevent patients from experiencing adverse reactions such as dehydration. Similarly, if the pressure in the blood circuit exceeds the set safety range, the alarm unit will also issue a warning in time to remind medical staff to intervene and ensure that the device does not cause harm to the patient.

[0053] It is worth mentioning that the alarm unit is designed to be automated and does not require human intervention. Once a problem occurs, the system will automatically determine the abnormality and respond according to the preset threshold and safety standards. This design greatly improves the safety and reliability of the equipment, especially when there is no one on duty or medical staff cannot monitor the equipment all the time, the alarm unit provides a powerful protection function.

[0054] In summary, the data management unit provides data support for medical staff by storing and analyzing equipment operation data and patient treatment information, helping to optimize treatment plans and providing a basis for long-term patient tracking. The alarm unit monitors the equipment status in real time and issues an alarm when parameters are abnormal, reminding medical staff to intervene in time. The addition of these two units not only improves the intelligence level of the equipment, but also ensures the safety of patient treatment and the reliability of the equipment, further improving the control system of the entire blood purification equipment.

[0055] In one example, the system further includes: a remote monitoring unit, which is communicatively connected to the CAN bus 6 and communicates with a remote server through a network, for realizing remote monitoring, diagnosis and software update of the equipment, and improving the maintenance efficiency and service level of the equipment.

[0056] It should be noted that the main function of the alarm unit is to issue an alarm when the system operation is abnormal or certain parameters exceed the safe range. During the operation of the equipment, various abnormal situations may be encountered, such as abnormal liquid flow, excessive pressure, insufficient anticoagulant concentration, or interruption of internal communication in the system. At this time, the alarm unit will determine whether the equipment has exceeded the safe range based on the real-time data from each unit. Once an abnormality is detected, the alarm unit will immediately send out a sound or light signal, and even in some advanced equipment, it will send a text message or notify medical staff through the network.

[0057] This alarm mechanism is crucial to ensure the safety of the device. For example, if the fluid balance unit 2 detects an imbalance in fluid input and output, it may trigger the alarm unit to indicate that the ultrafiltration rate is too high. The system will use an alarm to remind medical staff to take prompt measures to prevent patients from experiencing adverse reactions such as dehydration. Similarly, if the pressure in the blood circuit exceeds the set safety range, the alarm unit will also issue a warning in time to remind medical staff to intervene and ensure that the device does not cause harm to the patient.

[0058] It is worth mentioning that the alarm unit is designed to be automated and does not require human intervention. Once a problem occurs, the system will automatically determine the abnormality and respond according to the preset threshold and safety standards. This design greatly improves the safety and reliability of the equipment, especially when there is no one on duty or medical staff cannot monitor the equipment all the time, the alarm unit provides a powerful protection function.

[0059] In summary, the data management unit provides data support for medical staff by storing and analyzing equipment operation data and patient treatment information, helping to optimize treatment plans and providing a basis for long-term patient tracking. The alarm unit monitors the equipment status in real time and issues an alarm when parameters are abnormal, reminding medical staff to intervene in time. The addition of these two units not only improves the intelligence level of the equipment, but also ensures the safety of patient treatment and the reliability of the equipment, further improving the control system of the entire blood purification equipment.

[0060] In one example, the human-computer interaction unit 1, the liquid balance unit 2, the blood circuit unit 3, the blood anticoagulation unit 4 and the power supply unit 5 are hardware-independent computing units, each of which operates independently and works in coordination.

[0061] In this example, the human-computer interaction unit 1, the liquid balance unit 2, the blood circuit unit 3, the blood anticoagulation unit 4 and the power supply unit 5 are all designed as hardware-independent computing units, which means that each unit has an independent hardware circuit, processor and control system, and can complete its respective tasks independently without relying on the central processor or other units for data processing and logic control.

[0062] Each computing unit operates independently, which means that these units can autonomously perform their own operations and processing tasks. For example, the human-computer interaction unit 1 is responsible for receiving user input and displaying device status, and its processing is separate from the liquid balance unit 2, which is responsible for regulating and monitoring liquid flow. In this way, if one unit encounters a problem or fails, it will not affect the normal operation of other units. This design improves the fault tolerance and stability of the system and avoids the risk of single point failure in traditional centralized architecture (such as the main control CPU error causing the entire system to crash).

[0063] At the same time, these independent computing units work together to exchange data through communication protocols such as the CAN bus 6. For example, the liquid balance unit 2 can send data on liquid flow conditions to the human-machine interaction unit 1 in real time, which is displayed to medical staff by the human-machine interface. At the same time, the blood circuit unit 3 can work in conjunction with the blood anticoagulation unit 4 to ensure smooth blood flow and reasonable injection of anticoagulants. In this process, each unit transmits data to each other through a custom protocol to ensure that the entire blood purification process is coordinated and orderly.

[0064] This distributed architecture design not only improves the reliability of the system, but also enhances the modularity and maintainability of the system. For example, if the hardware of the blood circuit unit 3 fails, only the unit needs to be replaced without affecting the functions of other units. This greatly reduces maintenance time and cost, while increasing the service life of the equipment.

[0065] Therefore, the independent hardware computing unit architecture in the design ensures that each unit can complete its task independently and efficiently, while achieving stable, efficient and reliable operation of the overall system through collaborative work, meeting the high requirements of blood purification equipment in terms of safety, stability and flexibility.

[0066] In one example, each of the computing units has an independent PCB board and DCDC circuit, and data is exchanged between each other via a custom protocol on the CAN bus 6 .

[0067] In this example, each computing unit (such as the human-computer interaction unit 1, the liquid balance unit 2, the blood circuit unit 3, the blood anticoagulation unit 4 and the power supply unit 5) has an independent PCB board and DCDC circuit, and exchanges data through a custom protocol on the CAN bus 6.

[0068] Independent PCB means that each computing unit has its own dedicated circuit board, carrying its own processor, sensor, controller and other electronic components. This enables each unit to run independently on physical hardware without relying on the hardware resources of other units. Such a design brings higher modular flexibility: if a unit needs maintenance or upgrade, engineers only need to replace the PCB board of the unit without affecting the work of other units.

[0069] The DCDC circuit is responsible for converting the input power into a working voltage suitable for the unit. The DCDC circuit is a type of switching power supply that is used to efficiently convert between different voltages. In this system, each computing unit independently obtains the required working voltage through its own DCDC circuit to ensure stable power supply. This independent circuit design not only improves the working stability of each unit, but also enhances the system's anti-interference ability and avoids power supply fluctuations affecting the entire system.

[0070] CAN bus 6 is the core mechanism for communication between the computing units in the system. CAN (Controller Area Network) bus is a communication protocol commonly used in industrial equipment, automobiles and medical equipment. It is widely used because of its high reliability and strong anti-interference ability. Through CAN bus 6, each computing unit in the system can exchange data with other units efficiently and with low latency.

[0071] In addition, the custom protocol mentioned here means that each operation unit transmits information on the CAN bus 6 through specific communication rules. This protocol may be specially designed to meet specific equipment requirements and can ensure the efficiency, accuracy and security of data transmission. For example, the liquid balance unit 2 may need to send liquid flow rate data to the human-computer interaction unit 1 for display in real time, or the blood anticoagulation unit 4 needs to adjust the injection rate of the anticoagulant according to the data of the blood circuit unit 3. These information exchanges are all carried out through custom protocols to ensure coordination and synchronization between the units.

[0072] This distributed design not only improves the stability and safety of the system, but also enhances the modularity and maintainability of the equipment. For example, if a unit fails, only the PCB board of the unit needs to be replaced without disassembling the entire system. At the same time, the combination of CAN bus 6 and custom protocols ensures that the various computing units in the system can work together efficiently and seamlessly, allowing the entire blood purification process to be carried out safely and stably.

[0073] In summary, each computing unit achieves hardware independence through independent PCB boards and DCDC circuits, and realizes efficient data interaction through CAN bus 6 and custom communication protocols. This design greatly improves the flexibility, reliability and maintainability of the system.

[0074] In addition, in another example, a multi-board division of labor and collaborative control system based on a blood purification device can also be Figure 2 shown.

[0075] It should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, device, article or method including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, device, article or method. In the absence of further restrictions, an element defined by the sentence "includes a ..." does not exclude the presence of other identical elements in the process, device, article or method including the element.

[0076] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A multi-board division of labor and collaborative control system based on blood purification equipment, characterized in that: include: Human-machine interaction unit, liquid balance unit, blood circuit unit, blood anticoagulation unit, power supply unit and CAN bus, among which, The human-machine interaction unit is connected to the CAN bus for receiving operation instructions and parameter settings input by the user, and displaying the operation status and processing data of the device; The liquid balance unit is communicatively connected to the CAN bus and is used to monitor and adjust the input and output of liquid during the blood purification process in real time to control the ultrafiltration rate and the amount of fluid replacement; The blood circuit unit is communicatively connected to the CAN bus and is used to establish and maintain an extracorporeal blood circulation circuit to achieve drainage and reinfusion of the patient's blood; The blood anticoagulation unit is communicatively connected to the CAN bus and is used to inject anticoagulant into the blood circuit during the blood purification process to prevent blood from coagulating in the extracorporeal circulation system; The power board is communicatively connected to the CAN bus and is used to provide power support for the human-machine interaction unit, the liquid balance unit, the blood circuit unit and the blood anticoagulation unit.

2. The multi-board division of labor and collaborative control system according to claim 1 is characterized in that: The human-computer interaction unit also includes at least one of the following: a touch screen, a microphone, a camera and a card reader. The human-computer interaction unit receives the user's touch instructions and the operation information and processing data of the display device through the touch screen, receives the user's voice instructions through the microphone, and reads the user's identity information or medical card data through the card reader.

3. The multi-board division of labor and collaborative control system according to claim 1 is characterized in that: The liquid balance unit also includes: multiple liquid pumps, multiple pinch valves, front and rear dilution switching valves, a weighing module, an air valve, and an air pump. The multiple liquid pumps are used to control the delivery and recovery of liquid and adjust the flow and pressure of liquid; the pinch valve is used to open and close the liquid pipeline to achieve the switching and cutoff of the liquid flow direction; the front and rear dilution switching valve is used to switch between the front dilution and rear dilution modes and adjust the addition position of the replacement fluid; the weighing module is used to monitor the weight change of the liquid in real time and provide accurate liquid balance data; the air valve and the air pump are used to generate and adjust the air pressure inside the system, assist the delivery and discharge of the liquid, and prevent the formation and retention of bubbles.

4. The multi-board division of labor and collaborative control system according to claim 1 is characterized in that: The blood circuit unit includes: a blood pump, a blood sensor, an air detector and a temperature regulator; the blood pump is used to drive the flow of blood in the extracorporeal circulation system to maintain a stable blood flow; the blood sensor is used to monitor the blood flow rate, pressure and blood oxygen saturation in real time and provide feedback on blood parameters; the air detector is used to detect bubbles in the blood circuit to prevent the occurrence of air embolism; the temperature regulator is used to control the temperature of the blood to ensure that the temperature of the returned blood meets physiological requirements.

5. The multi-board division of labor and collaborative control system according to claim 1 is characterized in that: The blood anticoagulation unit includes: an anticoagulant pump, an anticoagulant storage container, and an anticoagulant concentration monitor; the anticoagulant pump is used to accurately control the injection speed and dosage of the anticoagulant; the anticoagulant storage container is used to store the anticoagulant solution to maintain a stable supply of anticoagulant; the anticoagulant concentration monitor is used to detect the concentration of the anticoagulant to ensure the reliability of the anticoagulant effect.

6. The multi-board division of labor and collaborative control system according to claim 1 is characterized in that: The system also includes an alarm unit, which is used to issue an alarm prompt when the system operates abnormally or the parameters exceed the safe range, reminding medical staff to deal with it in time.

7. The multi-board division of labor and collaborative control system according to claim 1 is characterized in that: The system also includes a remote monitoring unit, which is communicatively connected to the CAN bus and communicates with a remote server via a network, so as to realize remote monitoring, diagnosis and software update of the equipment, and improve the maintenance efficiency and service level of the equipment.

8. The multi-board division of labor and collaborative control system according to claim 1 is characterized in that: The human-computer interaction unit, the liquid balance unit, the blood circuit unit, the blood anticoagulation unit and the power supply unit are hardware-independent computing units, and each computing unit operates independently and works in coordination.

9. The multi-board division of labor and collaborative control system according to claim 8, characterized in that: Each of the computing units has an independent PCB board and DCDC circuit, and data is exchanged between each other through a custom protocol on the CAN bus.

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