Ethernet power supply emergency lighting system for hospital wards

Abstract

The invention relates to the technical field of Ethernet power supply, in particular to an Ethernet power supply emergency lighting system for hospital wards. The power management unit is based on a dual-mode redundant power supply module, and provides power support meeting the IEC 60601-1 medical safety standard through seamless switching of PoE + + protocol main power supply and hot plug lithium battery pack emergency power supply; the network transmission unit realizes dual-channel communication between a gigabit wired network and a LoRa wireless ad hoc network through a dual-network redundancy transmission module based on PoE + + power output of the power management unit, considers the influence of electromagnetic interference on the stability of network transmission, considers the influence of electromagnetic interference in the network transmission process, and optimizes the network transmission process; and the intelligent control unit dynamically analyzes an HIS system instruction through an edge computing architecture and a multi-protocol gateway based on a PoE link of the network transmission unit.

Description

Technical Field

[0001] The present invention relates to the technical field of Power over Ethernet, and more particularly to a Power over Ethernet emergency lighting system for hospital wards. Background Art

[0002] A Power over Ethernet emergency lighting system for hospital wards is an intelligent solution that combines traditional emergency lighting with modern network technology. It provides power and data transmission for lighting devices through standard Ethernet cables, ensuring that necessary lighting can still be provided in case of main power failure to support the safe evacuation of personnel. In addition, this system is usually equipped with intelligent control functions, which can achieve functions such as remote monitoring, automatic testing, and alarming, and can flexibly adjust the lighting mode according to actual needs, improving energy utilization efficiency and management convenience, while meeting the requirements of fire safety standards. This system not only enhances the safety and response ability of hospital wards but also simplifies the installation and maintenance process.

[0003] In an existing Power over Ethernet emergency lighting system for hospital wards, power interruptions or instability often occur in the traditional system, and communication interruptions are prone to occur under network failures or electromagnetic interference; in the traditional system, the instruction parsing delay is high and the response is slow, the traditional lighting system has high energy consumption, low comfort, and stroboscopic effects on visual health; in summary, a Power over Ethernet emergency lighting system for hospital wards is designed. Summary of the Invention

[0004] The purpose of the present invention is to provide a Power over Ethernet emergency lighting system for hospital wards to solve the problems raised in the above background art, that is, in an existing Power over Ethernet emergency lighting system for hospital wards, power interruptions or instability often occur in the traditional system, and communication interruptions are prone to occur under network failures or electromagnetic interference; in the traditional system, the instruction parsing delay is high and the response is slow, the traditional lighting system has high energy consumption, low comfort, and stroboscopic effects on visual health.

[0005] To achieve the above object, the present invention aims to provide a Power over Ethernet emergency lighting system for hospital wards, including a power management unit. The power management unit is based on a dual-mode redundant power supply module to provide seamless switching between main power supply through the PoE++ protocol and emergency power supply of a hot-swappable lithium battery pack, providing power support that meets the IEC 60601-1 medical safety standard; a network transmission unit. The network transmission unit is based on the PoE++ power output of the power management unit to achieve dual-channel communication of gigabit wired network and LoRa wireless self-organizing network through a dual-network redundant transmission module, and considering the influence of electromagnetic interference on the stability of network transmission, the influence of electromagnetic interference is considered during the network transmission process to optimize the network transmission process; An intelligent control unit, which is based on the PoE link of the network transmission unit and dynamically analyzes HIS system instructions through an edge computing architecture and a multi-protocol gateway; An emergency lighting unit, which is based on the energy efficiency instruction of the intelligent control unit and outputs strobeless lighting through microwave radar occupancy detection and photosensitive adaptive adjustment functions.

[0006] As a further improvement of this technical solution, the dual-mode redundant power supply module includes a main power supply module and an emergency power supply module; Among them, the main power supply module provides a 48V DC power supply through an Ethernet cable based on the PoE++ protocol; The emergency power supply module is used to achieve seamless switching power supply through a hot-swappable lithium battery pack when the main power supply is interrupted.

[0007] As a further improvement of this technical solution, the specific steps for implementing dual-channel communication between a gigabit wired network and a LoRa wireless ad hoc network through a dual-network redundant transmission module are as follows: S3.1. Evaluate the current network status by calculating the quality scores of the wired and wireless links, and provide a basis for subsequent path selection; S3.2. Dynamically adjust the main and backup link switching times according to the real-time data traffic and link quality, and optimize the load distribution to maximize the link utilization rate; S3.3. Divide the data packets into segments suitable for the MTU size of each link, and transmit them through the dual channels to improve the overall reliability of the system; S3.4. Combine the transmission delays and bandwidth weights of the wired and wireless links, calculate the end-to-end average delay, and optimize the overall transmission efficiency; S3.5. After detecting a network failure, quickly restart the router and synchronize the control plane status to ensure the normal operation of the system.

[0008] As a further improvement of this technical solution, in S3.1, the specific process of evaluating the current network status by calculating the quality scores of the wired and wireless links is as follows: By calculating the quality score of the wired link , evaluate and quantify the performance of the wired network; By calculating the quality score of the wireless link , evaluate and quantify the performance of the wireless network; Since the network transmission is affected by electromagnetic interference, an electromagnetic interference variable is introduced to optimize the quality scores of the dual links. Then, the introduction of the electromagnetic interference variable to optimize the quality scores of the dual links is: The optimized quality score of the wired link is: ; In the formula, Indicates the quality score of the optimized wired link; Indicates the influence coefficient of electromagnetic interference on the quality score of the wired link; Indicates the level of electromagnetic interference in the wired network; The quality score of the optimized wireless link is: ; In the formula, Indicates the quality score of the optimized wireless link; Indicates the influence coefficient of electromagnetic interference on the quality score of the wireless link; Indicates the level of electromagnetic interference in the LoRa wireless network.

[0009] As a further improvement of this technical solution, in the S3.2, the specific process of dynamically adjusting the primary and secondary link switching time according to the real-time data traffic and link quality, and optimizing the load distribution to maximize the link utilization rate is as follows: Calculate the time required to switch from the primary link to the backup link in case of a failure to ensure service recovery. Then the primary and secondary link switching time is: ; In the formula, Indicates the primary and secondary link switching time; Indicates the amount of data in the cache queue during switching; Indicates the physical layer switching delay; Indicates the bandwidth of the current active link; Calculate the load balancing efficiency to measure the system's ability to allocate traffic to the two links to maximize resource utilization. Then the load balancing efficiency is: ; In the formula, Indicates the load balancing efficiency; Indicates the utilization rate of the wired link; Indicates the utilization rate of the wireless link; Considering that electromagnetic interference will affect the primary and secondary link switching time and load balancing efficiency, relevant variables related to electromagnetic interference are introduced to optimize the calculation process of the primary and secondary link switching time and load balancing efficiency: ; In the formula, Indicates the optimized primary and secondary link switching time; Indicates the level of electromagnetic interference in the current active link; Indicates the influence coefficient of electromagnetic interference on the switching time; ; In the formula, Indicates the optimized load balancing efficiency; represents the total electromagnetic interference level; represents the influence coefficient of electromagnetic interference on the load balancing efficiency.

[0010] As a further improvement of this technical solution, in the step S3.3, the specific steps of splitting the data packet into segments suitable for the MTU size of each link and transmitting through a dual-channel to improve the overall reliability of the system are as follows: Determine the number of split data segments according to the size of the system instruction data packet and the maximum transmission unit of the link , and then calculate the overall system reliability through the reliability of each channel ; Considering that electromagnetic interference will have a negative impact on the maximum transmission unit and system reliability, the influence coefficient of electromagnetic interference on the maximum transmission unit of the wireless link and the influence coefficient of electromagnetic interference on the maximum transmission unit of the wired link are introduced to optimize the calculation process of the number of data segments and the overall system reliability.

[0011] As a further improvement of this technical solution, in the step S3.4, the end-to-end average delay is calculated by combining the transmission delays and bandwidth weights of the wired and wireless links and the overall transmission efficiency is optimized; Considering that electromagnetic interference will affect the end-to-end average delay, thus affecting the overall transmission efficiency, the influence coefficient of electromagnetic interference on the end-to-end average delay is introduced to optimize the calculation process of the end-to-end average delay.

[0012] As a further improvement of this technical solution, in the step S3.5, the specific steps of quickly restarting the router and synchronizing the control plane state after detecting a network failure are as follows: Calculate the total time required from detecting the failure to restoring normal operation , which is used to ensure the consistency of the system state after the failure is recovered; Considering that electromagnetic interference will affect the duration of the overall failure recovery time, relevant variables of electromagnetic interference are introduced to optimize the calculation process of the total failure recovery time: ; In the formula, represents the optimized total failure recovery time; represents the optimized state synchronization time; represents the influence coefficient of electromagnetic interference on the overall failure recovery time; where, is: ; In the formula, represents the influence coefficient of electromagnetic interference on the state synchronization time; represents the level of electromagnetic interference in the backup link.

[0013] As a further improvement of this technical solution, the specific steps of dynamically parsing HIS system instructions through the edge computing architecture and multi - protocol gateway are as follows: S9.1: Receive instructions from the HIS system through the PoE link of the network transmission unit (2); S9.2: Use the edge computing architecture to quickly process the received data and determine the best response strategy; S9.3: Dynamically parse HIS instructions in different formats using multi - protocol gateway technology; S9.4: Send energy efficiency instructions to the emergency lighting unit (4) according to the processing results.

[0014] As a further improvement of this technical solution, the specific steps of outputting flicker - free lighting through microwave radar occupancy detection and photosensitive adaptive adjustment function are as follows: S10.1: Use microwave radar technology to detect the personnel activities in the ward; S10.2: Automatically adjust the lighting brightness according to the ambient light intensity; S10.3: Adjust the lighting parameters according to the energy efficiency instructions issued by the intelligent control unit (3).

[0015] Compared with the prior art, the beneficial effects of the present invention are: 1. In this Ethernet - powered emergency lighting system for hospital wards, seamless switching between main power supply and hot - swappable lithium - battery - pack emergency power supply is achieved through the dual - mode redundant power supply module, ensuring continuous power supply that meets the IEC 60601 - 1 medical safety standard. The dual - network redundant transmission module realizes dual - channel communication between gigabit wired network and LoRa wireless self - organizing network, and an electromagnetic interference optimization mechanism is introduced to enhance the stability and anti - interference ability of network transmission.

[0016] 2. In this Ethernet - powered emergency lighting system for hospital wards, the edge computing architecture and multi - protocol gateway are used to dynamically parse HIS system instructions, improving the data processing speed and flexibility. Based on microwave radar occupancy detection and photosensitive adaptive adjustment function, flicker - free lighting is realized. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is the overall flow block diagram of the present invention; The meanings of each label in the figure are as follows: 1. Power management unit; 11. Dual-mode redundant power supply module; 111. Main power supply module; 112. Emergency power supply module; 2. Network transmission unit; 21. Dual-network redundant transmission module; 3. Intelligent control unit; 4. Emergency lighting unit. Detailed implementation manners

[0018] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0019] Please refer to Figure 1 As shown, an Ethernet power supply emergency lighting system for a hospital ward is provided, including a power management unit 1. The power management unit 1 provides power support meeting the IEC 60601-1 medical safety standard through seamless switching between main power supply based on the PoE++ protocol and emergency power supply by a hot-swappable lithium battery pack based on the dual-mode redundant power supply module 11. In this embodiment, the dual-mode redundant power supply module 11 includes a main power supply module 111 and an emergency power supply module 112. Among them, the main power supply module 111 provides a 48V DC power supply through an Ethernet cable based on the PoE++ protocol. The emergency power supply module 112 is used to achieve seamless switching power supply through a hot-swappable lithium battery pack when the main power supply is interrupted.

[0020] Specifically, in the Ethernet power supply emergency lighting system for a hospital ward, the dual-mode redundant power supply module 11 ensures the high reliability and continuity of the lighting system by integrating the main power supply module 111 and the emergency power supply module 112. The main power supply module 111 provides a stable 48V DC power supply through the existing Ethernet cable based on the PoE++ protocol, simplifying the wiring and reducing the installation cost. When the main power supply is interrupted, the emergency power supply module 112 can quickly and seamlessly switch to be powered by the hot-swappable lithium battery pack, ensuring that the lighting system will not be interrupted, thereby providing continuous safe lighting for the ward, ensuring that patients and medical staff can enjoy sufficient light in any situation, and improving the safety and comfort of the medical environment. This design is especially suitable for medical places with extremely high requirements for the stability and safety of power supply.

[0021] Network transmission unit 2. Based on the PoE++ power output of the power management unit 1, the network transmission unit 2 realizes dual-channel communication between the gigabit wired network and the LoRa wireless ad-hoc network through the dual-network redundancy transmission module 21. Considering that electromagnetic interference affects the stability of network transmission, the impact of electromagnetic interference is taken into account during network transmission to optimize the network transmission process; In this example, the specific steps to realize dual-channel communication between the gigabit wired network and the LoRa wireless ad-hoc network through the dual-network redundancy transmission module 21 are as follows: S3.1. Evaluate the current network status by calculating the quality scores of the wired and wireless links, and provide a basis for subsequent path selection; In this example, the specific process of evaluating the current network status by calculating the quality scores of the wired and wireless links is as follows: By calculating the quality score of the wired link , evaluate and quantify the performance of the wired network; Then the quality score of the wired link is: ; In the formula, represents the quality score of the wired link; represents the gigabit wired bandwidth; represents the Ethernet delay; represents the delay threshold; represents the packet loss rate of the wired network; represents a constant; represents the influence weight of bandwidth and delay on the quality score of the wired link; represents the influence weight of the packet loss rate on the quality score of the wired link; By calculating the quality score of the wireless link , evaluate and quantify the performance of the wireless network; Then the quality score of the wireless link is: ; In the formula, represents the quality score of the wireless link; represents the LoRa signal strength; represents the LoRa bit error rate; represents the influence weight of signal strength on the quality score of the wireless link; represents the influence weight of the bit error rate on the quality score of the wireless link; Regarding that network transmission is affected by electromagnetic interference, an electromagnetic interference variable is introduced to optimize the quality scores of the dual links. Then the quality scores of the dual links optimized by introducing the electromagnetic interference variable are: The optimized quality score of the wired link is: ; In the formula, represents the quality score of the optimized wired link; represents the influence coefficient of electromagnetic interference on the quality score of the wired link; represents the level of electromagnetic interference in the wired network; The quality score of the optimized wireless link is: ; In the formula, represents the quality score of the optimized wireless link; represents the influence coefficient of electromagnetic interference on the quality score of the wireless link; represents the level of electromagnetic interference in the LoRa wireless network.

[0022] Specifically, in the Power over Ethernet (PoE) emergency lighting system in a hospital ward, the process of calculating the quality scores of the wired and wireless links to evaluate the current network status ensures the high reliability and stability of the system. The quality scores of the wired link and the wireless link respectively quantify the performance of the gigabit wired network and the LoRa wireless ad-hoc network, considering factors such as bandwidth, latency, packet loss rate, signal strength, and bit error rate. Further introducing the optimized link quality score with the electromagnetic interference variable can more accurately reflect the impact of electromagnetic interference in the actual environment on the network performance. This comprehensive evaluation mechanism enables the system to select the optimal transmission path in a complex environment and seamlessly switch to the backup link when the primary link fails or is interfered, thus ensuring that the emergency lighting system always operates stably, providing continuous and reliable lighting protection for patients and medical staff, and enhancing the safety and reliability of the medical environment.

[0023] S3.2. Dynamically adjust the primary-backup link switching time according to the real-time data traffic and link quality, and optimize the load distribution to maximize the link utilization rate; In this example, the specific process of dynamically adjusting the primary-backup link switching time according to the real-time data traffic and link quality and optimizing the load distribution to maximize the link utilization rate is as follows: Calculate the time required to switch from the primary link to the backup link in case of a failure to ensure service restoration. Then the primary-backup link switching time is: ; In the formula, represents the primary-backup link switching time; represents the amount of data in the cache queue at the time of switching; represents the physical layer switching delay; represents the bandwidth of the current active link; Calculate the load balancing efficiency, which measures how the system distributes traffic to the two links to maximize resource utilization. Then the load balancing efficiency is: ; In the formula, represents the load balancing efficiency; represents the utilization rate of the wired link; represents the utilization rate of the wireless link; Considering that electromagnetic interference will affect the primary - backup link switching time and load balancing efficiency, variables related to electromagnetic interference are introduced to optimize the calculation process of the primary - backup link switching time and load balancing efficiency: ; In the formula, represents the optimized primary - backup link switching time; represents the level of electromagnetic interference in the current active link; represents the influence coefficient of electromagnetic interference on the switching time; ; In the formula, represents the optimized load balancing efficiency; represents the total level of electromagnetic interference; represents the influence coefficient of electromagnetic interference on the load balancing efficiency.

[0024] Specifically, in the Power over Ethernet (PoE) emergency lighting system in a hospital ward, the process of maximizing the link utilization rate by dynamically adjusting the primary - backup link switching time and optimizing the load distribution ensures the high reliability and efficient operation of the system. Calculating and optimizing the primary - backup link switching time and load balancing efficiency can quickly respond to network failures according to real - time data traffic and link quality, and precisely adjust the switching time and load distribution strategy considering the impact of electromagnetic interference. This not only ensures a rapid and seamless switch to the backup link when the primary link fails, maintaining the continuity of the lighting system, but also improves the overall network performance by optimizing resource allocation. Therefore, this mechanism effectively enhances the stability and reliability of the emergency lighting system in a complex environment, provides continuous and reliable lighting protection for patients and medical staff, and further enhances the safety and comfort of the medical environment.

[0025] S3.3. Split the data packet into segments suitable for the MTU size of each link and use dual - channel transmission to improve the overall reliability of the system; In this example, the specific steps of splitting the data packet into segments suitable for the MTU size of each link and using dual - channel transmission to improve the overall reliability of the system are as follows: Determine the size of the data packet according to the system instruction and the maximum transmission unit of the link to determine the number of split data segments , and then calculate the overall system reliability through the reliability of each channel ; Among them, the number of data segments is: ; In the formula, represents the number of data segments; represents the size of the system instruction data packet; represents the maximum transmission unit of the wireless link; represents the maximum transmission unit of the wired link; Calculate the overall system reliability to ensure the reliability of data transmission. Then the overall system reliability is: ; In the formula, represents the overall system reliability; represents the single-channel reliability; represents the channel index variable; Considering that electromagnetic interference will have a negative impact on the maximum transmission unit and system reliability, the influence coefficient of electromagnetic interference on the maximum transmission unit of the wireless link and the influence coefficient of electromagnetic interference on the maximum transmission unit of the wired link are introduced to optimize the calculation process of the number of data segments and the overall system reliability: ; In the formula, represents the optimized number of data segments; represents the influence coefficient of electromagnetic interference on the maximum transmission unit of the wireless link; represents the influence coefficient of electromagnetic interference on the maximum transmission unit of the wired link; ; In the formula, represents the optimized overall system reliability; represents the negative influence coefficient of electromagnetic interference on the system reliability.

[0026] Specifically, in the Power over Ethernet (PoE) emergency lighting system in a hospital ward, by splitting data packets into segments suitable for the MTU size of each link and transmitting them through a dual-channel, the overall reliability and stability of the system can be significantly improved. The specific steps include calculating the optimized number of data segments to ensure that each segment can adapt to the maximum transmission unit of the current link and considering the impact of electromagnetic interference on the MTU. At the same time, calculate the optimized overall system reliability to ensure high-reliability data transmission even in the presence of electromagnetic interference. This mechanism not only ensures that system instructions can be efficiently and accurately transmitted through wired and wireless links but also maintains the continuity and stability of the system through redundant transmission when the primary link fails or is interfered with. Therefore, this process effectively enhances the anti-interference ability and reliability of the emergency lighting system, provides continuous and stable lighting protection for the hospital ward, and improves the safety and reliability of the medical environment.

[0027] S3.4. Combine the transmission delays and bandwidth weights of the wired and wireless links to calculate the end-to-end average delay and optimize the overall transmission efficiency. In this example, combine the transmission delays and bandwidth weights of the wired and wireless links to calculate the end-to-end average delay and optimize the overall transmission efficiency. Calculate the end-to-end average delay , which is used to consider the transmission delays of all data packets and optimize the overall performance of the network. Then the end-to-end average delay is: ; In the formula, represents the end-to-end average delay; represents the single-channel transmission delay of the wired link; represents the single-channel transmission delay of the wireless link; represents the bandwidth allocation weight of the wired link; represents the bandwidth allocation weight of the wireless link; represents the number of data packets within the statistical period; Among them, is: ; is: ; Considering that electromagnetic interference can affect the end-to-end average delay and thus the overall transmission efficiency, the influence coefficient of electromagnetic interference on the end-to-end average delay is introduced to optimize the calculation process of the end-to-end average delay: ; In the formula, Denote the optimized end-to-end average delay; Denote the optimized wired link bandwidth allocation weight; Denote the optimized wireless link bandwidth allocation weight; Denote the influence coefficient of electromagnetic interference on the end-to-end average delay; Wherein, Is optimized to: ; Is optimized to: ; In the formula, Denote the influence coefficient of electromagnetic interference on the Ethernet bandwidth utilization rate.

[0028] Specifically, in the Ethernet power supply emergency lighting system in the hospital ward, by combining the transmission delays and bandwidth weights of the wired and wireless links to calculate and optimize the end-to-end average delay, the overall transmission efficiency and stability of the system can be significantly improved. Calculating the optimized end-to-end average delay takes into account the influence of electromagnetic interference on the transmission delays and bandwidth allocation weights of each link, ensuring low-latency and high-efficiency data transmission even in a complex network environment. This mechanism not only ensures that the instructions of the emergency lighting system can be transmitted quickly and accurately, but also can dynamically adjust the resource allocation in the presence of electromagnetic interference, ensuring the stability and reliability of the system. Therefore, this process effectively improves the response speed and data transmission quality of the emergency lighting system, provides continuous and reliable lighting protection for the hospital ward, and enhances the safety and comfort of the medical environment.

[0029] S3.5. After detecting a network failure, quickly restart the router and synchronize the control plane state to ensure the system resumes normal operation.

[0030] In this example, the specific steps for quickly restarting the router and synchronizing the control plane state after detecting a network failure are as follows: Calculate the total time required from detecting the failure to resuming normal operation , to ensure the consistency of the system state after the failure recovery, then the total failure recovery time is: ; In the formula, Denote the total failure recovery time; Denote the failure detection time; Denote the state synchronization time; Denote the routing convergence time; Wherein, the state synchronization time is: ; In the formula, Indicates the amount of control plane status synchronization data; Indicates the backup link bandwidth; Indicates the maximum number of retransmissions; Indicates the confirmation time; Considering that electromagnetic interference will affect the duration of the overall fault recovery time, relevant variables of electromagnetic interference are introduced to optimize the calculation process of the total fault recovery time: ; In the formula, Indicates the optimized total fault recovery time; Indicates the optimized status synchronization time; Indicates the influence coefficient of electromagnetic interference on the overall fault recovery time; Among them, is: ; In the formula, Indicates the influence coefficient of electromagnetic interference on the status synchronization time; Indicates the level of electromagnetic interference in the backup link.

[0031] Specifically, in the Ethernet Power over Ethernet (PoE) emergency lighting system in a hospital ward, the process of quickly restarting the router and synchronizing the control plane status to ensure the system quickly resumes normal operation after detecting a network fault greatly improves the reliability and response speed of the system. Calculating the optimized total fault recovery time takes into account the influence of electromagnetic interference on fault detection, route convergence, and status synchronization time, ensuring that the consistency of the system state can be quickly restored even in a complex network environment. This mechanism can not only quickly switch to the backup link when the primary link fails to maintain the continuous operation of the lighting system but also dynamically adjust the status synchronization strategy to cope with the challenges brought by electromagnetic interference, thereby ensuring the stability and reliability of the system. Therefore, this process effectively enhances the anti-interference ability and fault recovery speed of the emergency lighting system, provides continuous and reliable lighting protection for the hospital ward, and further improves the safety and stability of the medical environment.

[0032] Furthermore, in the Ethernet Power over Ethernet (PoE) emergency lighting system in a hospital ward, the dual-network redundant transmission module 21 ensures the high reliability and continuity of the system by implementing dual-channel communication between the gigabit wired network and the LoRa wireless ad-hoc network. The specific steps include: first, evaluating the current network status and calculating the link quality score (S3.1) to provide a basis for path selection; then, dynamically adjusting the primary and backup link switching time and optimizing the load distribution according to the real-time data traffic and link quality (S3.2); next, splitting the data packets into segments suitable for the MTU size of each link and transmitting them through the dual channels to improve the system reliability (S3.3); calculating the end-to-end average delay by combining the transmission delays and bandwidth weights of the wired and wireless links and optimizing the overall transmission efficiency (S3.4); finally, quickly restarting the router and synchronizing the control plane status after detecting a network failure to ensure the system quickly resumes normal operation (S3.5). These measures jointly ensure that the lighting system can operate stably and efficiently under any circumstances, providing continuous and reliable lighting services for patients and medical staff, and enhancing the safety and stability of the medical environment.

[0033] Intelligent control unit 3, the intelligent control unit 3 is based on the PoE link of the network transmission unit 2, and dynamically analyzes the HIS system instructions through the edge computing architecture and the multi-protocol gateway; In this example, the specific steps for dynamically analyzing the HIS system instructions through the edge computing architecture and the multi-protocol gateway are: S9.1, Receive instructions from the HIS system through the PoE link of the network transmission unit 2; Specifically, in the network transmission unit, the system uses the Ethernet Power over Ethernet (PoE) technology to transmit data and power. Specifically, various instructions issued by the Hospital Information System (HIS) are transmitted to the intelligent control unit through the gigabit wired network or the LoRa wireless ad-hoc network. These instructions contain information such as ward management, lighting control, and equipment status monitoring. Due to the adoption of the PoE technology, data and power can be transmitted through the same Ethernet cable, simplifying the wiring and improving the system integration.

[0034] S9.2, Use the edge computing architecture to quickly process the received data and determine the best response strategy; Specifically, once the instructions from the HIS system are received, the intelligent control unit will quickly process these data using its built-in edge computing architecture. The advantage of edge computing is that it can perform real-time data analysis and decision-making locally without uploading all data to the cloud, thus reducing the latency and improving the response speed. During the processing, the system will analyze the optimal response strategy according to the current environmental conditions (such as personnel activities, light intensity, etc.) and historical data. For example, if it is detected that there is no personnel activity in the ward, the system may decide to reduce the lighting brightness to save energy.

[0035] S9.3, using multi-protocol gateway technology to dynamically parse HIS instructions of different formats; Specifically, since hospital information systems may use a variety of different communication protocols and data formats, intelligent control units need to have strong compatibility to handle these differences. Multi-protocol gateway technology enables the system to dynamically parse HIS instructions in various formats. Whether the instructions are sent via HTTP, MQTT or other protocols, the multi-protocol gateway can convert them into a unified format within the system to ensure data consistency and operability. In this way, even if the HIS system is upgraded or the protocol is replaced, the emergency lighting system can still be seamlessly connected and continue to operate normally.

[0036] S9.4. Send an energy efficiency instruction to the emergency lighting unit 4 according to the processing result.

[0037] Specifically, the last step is to send specific energy efficiency instructions to the emergency lighting unit based on the results of the previous steps. These instructions include adjusting the lighting brightness, the timetable for turning lights on and off, and other lighting-related parameter settings. For example, if the system determines that there is sufficient light in the ward and no one is active, it may send instructions to reduce the lighting brightness or turn off some lamps; at night or when someone enters the ward, the lighting brightness will be increased accordingly. In this way, the system not only realizes intelligent control, but also effectively saves energy and improves the comfort and safety of the ward environment.

[0038] This process ensures that the emergency lighting system in hospital wards can respond efficiently and flexibly to various needs and provide stable and reliable lighting services.

[0039] Furthermore, in the Ethernet powered emergency lighting system of the hospital ward, the response speed and intelligence level of the system are significantly improved through the process of dynamically parsing HIS system instructions through the edge computing architecture and multi-protocol gateway. The specific steps include: first receiving instructions from the HIS system through the PoE link (S9.1), then using the edge computing architecture to quickly process these data and determine the best response strategy (S9.2), then using multi-protocol gateway technology to dynamically parse HIS instructions in different formats (S9.3), and finally sending energy efficiency instructions to the emergency lighting unit based on the processing results (S9.4). This mechanism ensures that the emergency lighting system can respond quickly and accurately to the needs of the hospital information system and achieve efficient energy management and lighting control. Therefore, this process not only improves the reliability and flexibility of the system, but also optimizes the comfort and safety of the ward environment, providing patients and medical staff with a better medical experience.

[0040] The emergency lighting unit 4 outputs flicker-free lighting based on the energy efficiency instruction of the intelligent control unit 3 through microwave radar occupancy detection and photosensitivity adaptive adjustment functions.

[0041] In this example, the specific steps to output stroboscopic-free lighting through microwave radar occupancy detection and photosensitive adaptive adjustment functions are as follows: S10.1. Detect the personnel activities in the ward using microwave radar technology; Specifically, in the emergency lighting system, microwave radar sensors are installed at key positions in the ward to monitor the personnel activities in the room in real time. These sensors determine the presence and specific location of personnel by transmitting microwave signals and receiving the reflected signals. When someone enters or moves in the room, the microwave radar can accurately capture these changes and transmit the relevant information to the intelligent control unit. This non-contact detection method is not only efficient and reliable but also avoids privacy issues because it does not capture or record any images.

[0042] S10.2. Automatically adjust the lighting brightness according to the ambient light intensity; Specifically, to provide the best visual comfort and save energy, the emergency lighting system automatically adjusts the lighting brightness according to the ambient light intensity. Photosensitive sensors are deployed in the ward to measure the current light level in the environment in real time. If the natural light is sufficient, the system will automatically reduce the brightness of the artificial lighting or even turn off unnecessary lights; in case of insufficient light (such as at night or on cloudy days), the system will increase the lighting brightness accordingly to ensure that the ward always maintains appropriate lighting conditions. This adaptive adjustment function not only improves the comfort of patients but also significantly reduces power consumption.

[0043] S10.3. Adjust the lighting parameters according to the energy efficiency instructions issued by the intelligent control unit 3.

[0044] Specifically, after receiving the data from the microwave radar and photosensitive sensors, the intelligent control unit generates specific energy efficiency instructions by combining the instructions of the HIS system and other environmental information. These instructions include adjusting the lighting brightness, setting the schedule for timed turning on and off of lights, and other lighting-related parameter settings. For example, if there is no personnel activity in the ward and the light is sufficient, the intelligent control unit may issue an instruction to dim or turn off the lights; while at a specific time period (such as in the morning or evening) or when someone enters the room, it will issue an instruction to increase the lighting brightness. In addition, the intelligent control unit can also dynamically adjust the lighting parameters according to the hospital's energy-saving strategy to achieve the best energy utilization efficiency.

[0045] Furthermore, in the Power over Ethernet (PoE) emergency lighting system for hospital wards, the process of achieving flicker-free lighting through microwave radar occupancy detection and photosensitive adaptive adjustment significantly improves the comfort of the ward environment and energy utilization efficiency. The specific steps are as follows: First, use microwave radar technology to detect the personnel activities in the ward (S10.1) to ensure that the lighting system can automatically turn on / off or adjust the brightness according to actual needs; then automatically adjust the lighting brightness according to the ambient light intensity (S10.2) to ensure that the light is soft and appropriate; finally, further optimize the lighting parameters according to the energy efficiency instructions issued by the intelligent control unit (S10.3) to achieve high energy efficiency. This mechanism not only provides continuous and stable lighting protection but also avoids the impact of flicker on the visual fatigue of patients and medical staff, improving the safety and comfort of the medical environment and providing strong support for high-quality medical services.

[0046] Application Example: This system aims to provide an efficient, reliable, and safe emergency lighting solution for hospital wards. The system includes a power management unit 1, a network transmission unit 2, an intelligent control unit 3, and an emergency lighting unit 4, and ensures the stability and intelligence of the system through various technical means.

[0047] Power Management Unit 1: Main Power Supply Module 111: Provide a 48V DC power supply through the PoE++ protocol.

[0048] Emergency Power Supply Module 112: When the main power supply is interrupted, achieve seamless switching power supply through a hot-swappable lithium battery pack to ensure compliance with the IEC 60601-1 medical safety standard.

[0049] Network Transmission Unit 2: Dual Network Redundant Transmission Module 21: Link Quality Assessment S3.1: Calculate the quality scores of wired and wireless links.

[0050] Dynamic Adjustment of Primary and Backup Link Switching Time S3.2: Optimize the load distribution according to real-time data traffic and link quality.

[0051] Packet Segmentation and Dual-Channel Transmission S3.3: Segment the data packets into fragments suitable for the MTU size of each link and transmit them through dual channels.

[0052] End-to-End Average Delay Optimization S3.4: Calculate and optimize the end-to-end average delay by combining transmission delay and bandwidth weight.

[0053] Fault Recovery and Synchronization S3.5: Quickly restart the router and synchronize the control plane state.

[0054] Intelligent Control Unit 3: Edge computing architecture: Receive and process instructions from the HIS system (S9.1 - S9.4).

[0055] Multi - protocol gateway: Dynamically resolve HIS instructions in different formats.

[0056] Emergency lighting unit 4: Microwave radar occupancy detection S10.1: Detect the personnel activities in the ward.

[0057] Photosensitive adaptive adjustment function S10.2: Automatically adjust the lighting brightness according to the ambient light intensity.

[0058] Energy efficiency instruction execution S10.3: Adjust the lighting parameters according to the energy efficiency instructions issued by the intelligent control unit.

[0059] Implementation process: Installation of power management unit: Install a PoE++ switch in each ward and connect it to the main power supply module 111.

[0060] Configure the emergency power supply module 112 to ensure seamless switching to lithium - battery - pack power supply in case of main - power interruption.

[0061] Configuration of network transmission unit: Lay gigabit Ethernet cables in the ward and connect them to the dual - network redundant transmission module 21.

[0062] Configure LoRa wireless ad - hoc network to ensure coverage of all ward areas.

[0063] Integration of intelligent control unit: Connect the intelligent control unit 3 to the PoE link of the network transmission unit 2.

[0064] Configure the edge computing architecture and multi - protocol gateway to ensure dynamic resolution of HIS system instructions.

[0065] Deployment of emergency lighting unit: Install microwave radar sensors and photosensitive sensors on the ward ceiling.

[0066] Connect the emergency lighting fixtures to the intelligent control unit 3 to ensure reception and execution of energy efficiency instructions.

[0067] System debugging and optimization Link quality assessment S3.1: Use the calculation formula and , evaluate the current network status and optimize the path selection according to the results.

[0068] Primary - standby link switching time optimization S3.2: Calculate and adjust the primary and backup link switching time according to real-time data traffic and link quality and load balancing efficiency 。

[0069] Packet segmentation and transmission S3.3: Calculate the number of data segments and segment the data packet into segments suitable for the MTU size of each link to ensure high-reliability transmission.

[0070] End-to-end average delay optimization S3.4: Combine the transmission delay and bandwidth weight to calculate and optimize the end-to-end average delay 。

[0071] Fault recovery and synchronization S3.5: Test the fault detection, routing convergence, and status synchronization time to ensure that normal operation can be quickly restored in case of a fault.

[0072] Daily operation and maintenance Daily monitoring: Real-time monitor the personnel activities and environmental light intensity in the ward to ensure that the lighting system adjusts the brightness as needed.

[0073] Regular inspection: Regularly check the working status of the power management unit, network transmission unit, and emergency lighting unit to ensure the stable operation of the system.

[0074] Data analysis and optimization: Collect the system operation data, analyze the impact of electromagnetic interference on network transmission, and optimize the system parameters according to the results.

[0075] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and the descriptions in the specification are only preferred examples of the present invention and are not used to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed.

Claims

1. An Ethernet Power over Ethernet (PoE) emergency lighting system for a hospital ward, characterized in that: Including: A power management unit (1), which is based on a dual-mode redundant power supply module (11) and provides power support meeting the IEC 60601-1 medical safety standard through seamless switching between PoE++ protocol main power supply and hot-swappable lithium battery pack emergency power supply; A network transmission unit (2), which is based on the PoE++ power output of the power management unit (1) and realizes dual-channel communication of gigabit wired network and LoRa wireless self-organizing network through a dual-network redundant transmission module (21), and considers the influence of electromagnetic interference during network transmission for optimizing network transmission; An intelligent control unit (3), which is based on the PoE link of the network transmission unit (2) and dynamically analyzes HIS system instructions through an edge computing architecture and a multi-protocol gateway; An emergency lighting unit (4), which is based on the energy efficiency instruction of the intelligent control unit (3) and outputs flicker-free lighting through microwave radar occupancy detection and photosensitive adaptive adjustment functions.

2. The Power over Ethernet emergency lighting system for hospital wards according to claim 1, characterized in that: The dual-mode redundant power supply module (11) includes a main power supply module (111) and an emergency power supply module (112); Among them, the main power supply module (111) provides a 48V DC power supply through an Ethernet cable based on the PoE++ protocol; The emergency power supply module (112) is used to achieve seamless switching power supply through a hot-swappable lithium battery pack when the main power supply is interrupted.

3. The Power over Ethernet emergency lighting system for hospital wards according to claim 1, wherein: The specific steps for realizing dual-channel communication of gigabit wired network and LoRa wireless self-organizing network through the dual-network redundant transmission module (21) are as follows: S3.

1. Evaluate the current network status by calculating the quality scores of wired and wireless links, and provide a basis for subsequent path selection; S3.

2. Dynamically adjust the main and standby link switching time according to the real-time data traffic and link quality, and optimize the load distribution to maximize the link utilization rate; S3.

3. Split the data packets into segments suitable for the MTU size of each link, and transmit through dual channels to improve the overall reliability of the system; S3.

4. Combine the transmission delay and bandwidth weights of wired and wireless links, calculate the end-to-end average delay and optimize the overall transmission efficiency; S3.

5. After detecting a network failure, quickly restart the router and synchronize the control plane status to ensure the system resumes normal operation.

4. The Power over Ethernet emergency lighting system for hospital wards according to claim 3, characterized in that: In the above S3.1, the specific process of evaluating the current network status by calculating the quality scores of wired and wireless links is as follows: By calculating the quality score of the wired link , evaluate and quantify the performance of the wired network; By calculating the quality score of the wireless link , evaluate and quantify the performance of the wireless network; Since the network transmission is affected by electromagnetic interference, an electromagnetic interference variable is introduced to optimize the quality scores of the dual links. Then the quality scores of the dual links optimized by introducing the electromagnetic interference variable are: The quality score of the optimized wired link is: ； In the formula, represents the quality score of the optimized wired link; represents the influence coefficient of electromagnetic interference on the quality score of the wired link; represents the level of electromagnetic interference in the wired network; The quality score of the optimized wireless link is: ； In the formula, represents the quality score of the optimized wireless link; represents the influence coefficient of electromagnetic interference on the quality score of the wireless link; represents the level of electromagnetic interference in the LoRa wireless network.

5. The Power over Ethernet emergency lighting system for hospital wards according to claim 4, characterized in that: In the above S3.2, the specific process of dynamically adjusting the main and standby link switching time according to the real-time data traffic and link quality, and optimizing the load distribution to maximize the link utilization rate is as follows: Calculate the time required to switch from the main link to the standby link in case of a failure to ensure service restoration. Then the main and standby link switching time is: ； In the formula, represents the primary and backup link switching time; represents the amount of data in the cache queue during switching; represents the physical layer switching delay; represents the bandwidth of the current active link; Calculate the load balancing efficiency. When measuring the system's allocation of traffic to two links to maximize resource utilization, the load balancing efficiency is as follows: ； Wherein, represents the load balancing efficiency; represents the utilization rate of the wired link; represents the utilization rate of the wireless link; Considering that electromagnetic interference can affect the primary and backup link switching time and load balancing efficiency, variables related to electromagnetic interference are introduced to optimize the primary and backup link switching time and load balancing efficiency: ； Wherein, represents the optimized master - standby link switching time; represents the electromagnetic interference level in the current active link; represents the influence coefficient of electromagnetic interference on the switching time; ； Wherein, represents the optimized load balancing efficiency; represents the total electromagnetic interference level; represents the influence coefficient of electromagnetic interference on the load balancing efficiency.

6. The Power over Ethernet emergency lighting system for hospital wards according to claim 5, characterized in that: In S3.3, the specific steps for splitting data packets into segments suitable for the MTU size of each link and transmitting them through a dual-channel for improving the overall reliability of the system are as follows: Determine the number of segmented data fragments according to the system instruction data packet size and the maximum transmission unit of the link , and then calculate the overall system reliability through the reliability of each channel ; Considering that electromagnetic interference has a negative impact on the maximum transmission unit and system reliability, the influence coefficients of electromagnetic interference on the maximum transmission unit of the wireless link and the influence coefficient of electromagnetic interference on the maximum transmission unit of the wired link are introduced to optimize the number of data segments.

7. The Power over Ethernet emergency lighting system for hospital wards according to claim 6, characterized in that: In S3.4, calculate the end-to-end average delay by combining the transmission delays and bandwidth weights of the wired and wireless links and optimize the overall transmission efficiency; Considering that electromagnetic interference will affect the end-to-end average delay, thus affecting the overall transmission efficiency, the influence coefficient of electromagnetic interference on the end-to-end average delay is introduced , to optimize the end-to-end average delay.

8. The Power over Ethernet emergency lighting system for hospital wards according to claim 7, wherein: In S3.5, the specific steps for quickly restarting the router and synchronizing the control plane status after detecting a network failure are as follows: Calculate the total time required from detecting a fault to restoring normal operation , to ensure the consistency of the system state after fault recovery; Considering that electromagnetic interference can affect the duration of the overall fault recovery time, variables related to electromagnetic interference are introduced to optimize the calculation process of the total fault recovery time: ; Wherein, represents the total optimized fault recovery time; represents the optimized state synchronization time; represents the influence coefficient of electromagnetic interference on the overall fault recovery time; Among them, is as follows: ; In the formula, represents the influence coefficient of electromagnetic interference on the state synchronization time; represents the electromagnetic interference level in the backup link.

9. The Power over Ethernet emergency lighting system for hospital wards according to claim 8, characterized in that: The specific steps for dynamically parsing HIS system instructions through an edge computing architecture and a multi-protocol gateway are as follows: S9.1: Receive instructions from the HIS system through the PoE link of the network transmission unit (2); S9.2: Use the edge computing architecture to quickly process the received data and determine the best response strategy; S9.3: Use multi-protocol gateway technology to dynamically parse HIS instructions in different formats; S9.4: Send energy efficiency instructions to the emergency lighting unit (4) according to the processing results.

10. The Power over Ethernet emergency lighting system for hospital wards according to claim 9, characterized in that: The specific steps for outputting flicker-free lighting through microwave radar occupancy detection and photosensitive adaptive adjustment functions are as follows: S10.1: Use microwave radar technology to detect the personnel activities in the ward; S10.2: Automatically adjust the lighting brightness according to the ambient light intensity; S10.3: Adjust the lighting parameters according to the energy efficiency instructions issued by the intelligent control unit (3).

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