Energy-saving urban road lighting intelligent regulation and control system

Abstract

The invention discloses an energy-saving urban road lighting intelligent regulation and control system, and relates to the technical field of high-efficiency energy-saving industries. A street lamp communication network is reconstructed into a decentralized and peer-to-peer Mesh network, and a single lamp controller of each street lamp is endowed with an independent main control unit; a built-in Mesh communication module and a built-in network topology management module enable the system to have the capability of autonomously networking with any physically adjacent neighbor node, after the system is powered on, each main control unit automatically searches and establishes connection with other units in the communication range of the main control unit, and a distributed communication network covering a whole road network is dynamically formed. When any node in the system fails due to hardware damage or power failure, the node directly adjacent to the node can instantly sense the fault of the route through a heartbeat detection mechanism, and the network topology management module immediately starts a route reconstruction algorithm to switch the data flow which originally needs to pass through the fault node to a standby path formed by other healthy nodes.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of high-efficiency energy-saving industry, in particular to an energy-saving urban road lighting intelligent control system. BACKGROUND

[0002] With the acceleration of urbanization, the scale of road lighting systems is expanding, and their energy consumption and operation and maintenance costs have become an important burden for urban management. Traditional road lighting systems mostly use clock control or simple light-sensitive control to achieve primary energy saving, but cannot accurately adjust the light according to real-time traffic demand. Intelligent street lighting systems based on ZigBee, LoRa and other wireless communication technologies have begun to be popular, allowing central control systems to monitor individual lights and providing more possibilities for energy saving and management. However, such systems still have significant limitations in network architecture and control strategies, and have not fully tapped the potential of Internet of Things technology, facing bottlenecks in reliability, intelligence and overall energy efficiency.

[0003] In terms of network communication architecture, existing technologies use traditional star or tree networks, which rely heavily on concentrators or gateways. Once a street light in the network fails or the communication link is interrupted, not only will the node lose contact, but it may also cause all downstream child nodes and the network center to lose contact, leading to partial system paralysis and poor reliability. At the same time, in terms of fault response strategies, when a street light fails, the system can only record alarm information and wait for manual inspection and repair. During the period from the occurrence of the fault to the completion of the repair, the fault point will form a continuous dark area of lighting, posing a traffic safety hazard. Existing technologies lack an active and linked solution that can self-heal the network immediately upon failure and automatically trigger adjacent street lights to compensate for the lighting.

[0004] In summary, traditional road lighting systems have poor communication reliability and insufficient lighting continuity, and cannot meet the comprehensive needs of large-scale urban roads for lighting system stability, energy saving and intelligence, necessitating an integrated intelligent control solution with a distributed network. SUMMARY

[0005] The present application aims at solving the problems in the prior art and provides an energy-saving urban road lighting intelligent control system.

[0006] The present application aims at solving the problems in the prior art and provides an energy-saving urban road lighting intelligent control system. The main control unit comprises a Mesh communication module and a network topology management module. The Mesh communication module is used to establish a communication connection with other neighbor main control units in the street lamp node to receive, send and forward data packets to form a distributed self-organizing network. The network topology management module is configured to perform the following operations: The Mesh communication module is used to establish a communication connection with other neighbor main control units in the street lamp node to receive, send and forward data packets to form a distributed self-organizing network. Through periodic heartbeat signal interaction, the communication link state of the adjacent main control unit is monitored, and when the heartbeat signal is lost, it is determined that the neighbor street lamp node corresponding to the adjacent main control unit is a fault node. In response to the confirmation of the fault node, the routing path of the data packet is dynamically reconstructed to bypass the fault node. When the fault node is confirmed and the routing path of the data packet is started, a lighting compensation instruction signal is sent to the compensation control unit of the other adjacent street lamp node of the fault node.

[0007] Further, the network topology management module performs the neighbor discovery and networking specifically comprising: The main control unit sends a broadcast discovery signal through the Mesh communication module at initialization and periodic intervals; A neighbor main control unit within the communication range of the main control unit returns a response signal containing its own unique identity after receiving the signal; The main control unit and all responding neighbor main control units exchange identity and link state information with each other to form and maintain a distributed network topology map within the communication range.

[0008] Further, the network topology management module monitors the communication link state and confirms the specific steps of the faulty node: The main control unit sends a data request packet to each neighbor main control unit in the network topology map through the Mesh communication module at a fixed period; When no data response packet from the neighbor main control unit is received within a preset time window, a fault count is started; When the number of consecutive non-reception of heartbeat response packets exceeds a first preset threshold, the network topology management module determines that the neighbor street lamp node corresponding to the neighbor main control unit is a faulty node.

[0009] Further, the specific steps of the network topology management module for dynamically reconstructing the data packet routing path are: When the determined faulty node exists, the network topology management module of the main control unit removes all connection information of the faulty node from the maintained network topology map; Based on the updated network topology map, a routing algorithm is used to recalculate a new communication path to the destination node, which will bypass the faulty node and be relayed by multiple neighbor main control units to form a reconstructed communication link after failure.

[0010] Further, the specific steps of the routing algorithm for calculating the new communication path are: Parameter initialization: obtain the set of all street lamp nodes in the network topology map The set of street lamp nodes with determined shortest paths is The set of street lamp nodes without determined shortest paths is The link weight between street lamp node and street lamp node is The shortest path length from street lamp node to destination street lamp node is The destination street lamp node in the updated network topology map is assigned to set and the remaining street lamp nodes are assigned to set Initialization For all and , Among them, link weight , , and The weighting coefficients are and satisfy the following conditions: , Streetlight nodes and The normalized value of physical distance, Streetlight nodes and Packet loss rate of the communication link between them Streetlight nodes and The average transmission delay of the communication link between them; Link weight calculation: Collect the physical distance, link packet loss rate, and average transmission delay of all adjacent street light node pairs in the updated network topology map, and calculate the link weight between each pair of adjacent street light nodes. ; Optimal node selection: from the set Selected from The street light node with the smallest value Street light nodes From the set Remove and add to set ; Shortest path update: Traverse street light nodes All adjacent street light nodes When the street light node Still in the collection In the middle, then according to Recalculate Keep the current smallest Value as street light node To the destination street light node The latest shortest path length; Iteration termination check: Repeat the optimal node selection and shortest path update until the set is reached. If empty, then all street light nodes are connected to the destination street light node. The shortest paths from the current street light node to the destination street light node have all been determined. The shortest path is the optimal communication path after reconstruction.

[0011] Furthermore, the driving module is used to drive the LED light source to emit light, and includes a power conversion unit, a compensation control unit, and a driving control unit, wherein: The power conversion unit is used to convert the input electrical signal into a DC voltage adapted to the LED light source; The compensation control unit is used for receiving the lighting compensation instruction and controlling the output power of the driving control unit; The driving control unit is used for adjusting the driving power output to the LED light source.

[0012] Further, after the network topology management module generates and sends the lighting compensation instruction signal, the response mode of the driving module is: The other neighbor master control units adjacent to the fault node receive the lighting compensation instruction signal through the Mesh communication module; The master control unit analyzes the lighting compensation instruction signal and controls the driving module; The driving module drives the driving control unit of the local street lamp node to increase the power amplitude on the basis of the original lighting power, so as to compensate for the local lighting dark area caused by the extinguishing of the fault node.

[0013] Further, when the fault node is repaired and reconnected, the master control unit of the fault node establishes a communication connection with other neighbor master control units in the street lamp node through the Mesh communication module, forms a self-organizing network, and sends a recovery notification to the neighbor street lamp node. After the master control unit of the neighbor street lamp node confirms that the fault node is normal, the lighting compensation state is automatically released, and the driving module of the fault node restores the LED light source to the normal lighting mode.

[0014] Compared with the prior art, the energy-saving urban road lighting intelligent control system has the following beneficial effects: The street lamp communication network is reconstructed into a decentralized and peer-to-peer Mesh network, and the single lamp controller of each street lamp is given an independent master control unit. The built-in Mesh communication module and the network topology management module enable it to have the ability to autonomously network with any neighbor node that is physically adjacent. After the system is powered on, each master control unit automatically searches for and establishes a connection with other units within its communication range, dynamically forming a distributed communication network that covers the entire road network. When any node in the system fails due to hardware damage or power failure, the node directly adjacent to it will instantaneously perceive the route failure through the heartbeat detection mechanism. The network topology management module immediately starts the routing reconstruction algorithm, dynamically and seamlessly switches the data flow that originally needs to pass through the fault node to the backup path composed of other healthy nodes. This process is completely completed autonomously by the node group through local interaction without the intervention of a central controller, thereby realizing a closed loop from single failure to system function maintenance and ensuring that the control instruction can be reliably delivered in any single-point or multi-point failure scenario.

[0015] Other advantages, objectives and features of the invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination or study, or may be learned from the practice of the invention. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0017] Figure 1 A diagram illustrating the operation steps of an energy-saving intelligent control system for urban road lighting; Figure 2 This is a block diagram of an energy-saving intelligent control system for urban road lighting. Detailed Implementation

[0018] To better understand the above technical solutions, a detailed description of the solutions will be provided below in conjunction with the accompanying drawings and specific embodiments. Obviously, the described embodiments are merely some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0019] The terminology used in the embodiments of this invention is for the purpose of describing particular embodiments only and is not intended to limit the invention. The singular forms “a method for diagnosing transformer faults using multi-channel acoustic imaging and feature enhancement”, “the,” and “the” as used in the embodiments of this invention and the appended claims are also intended to include the plurality forms, unless the context clearly indicates otherwise; “plural” generally includes at least two.

[0020] It should also be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that an article or device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such an article or device. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the article or device that includes said element.

[0021] To address the problems of existing technologies, the present invention first describes the urban road lighting scenario involved in this invention. This invention is mainly applied to large-scale lighting systems such as urban roads, highways, and park roads. In these scenarios, there are many street light nodes that are widely distributed. Traditional centralized control methods suffer from problems such as poor communication reliability, slow fault response, and insufficient lighting continuity. This invention aims to achieve highly reliable, energy-efficient, and intelligent road lighting control through a distributed mesh network architecture, intelligent topology management, and active compensation mechanism.

[0022] This invention provides an energy-saving intelligent control system for urban road lighting. It constructs a self-organizing network through the main control unit of each streetlight node, enabling autonomous communication and collaborative control between nodes. After power-on, each main control unit automatically searches for neighboring nodes and forms a network, creating a distributed communication network covering the entire road network. The network topology management module monitors the link status in real time, dynamically reconstructs the routing path when a faulty node is detected, and triggers lighting compensation for adjacent nodes to ensure lighting continuity and system reliability. The drive module adjusts the power of the LED light source according to control commands, achieving energy-saving dimming and compensated lighting.

[0023] Specifically, such as Figure 2 The diagram shows a modular composition of an energy-saving intelligent control system for urban road lighting. The system includes N street light nodes, and each street light node includes an LED light source, a main control unit, and a driving module for driving the LED light source. The main control unit includes a Mesh communication module and a network topology management module, wherein: The Mesh communication module is used to establish communication connections with other neighboring main control units in the street light nodes to receive, send, and forward data packets, forming a distributed self-organizing network. The network topology management module is configured to perform the following operations: The Mesh communication module is used to discover and network neighbor street light nodes, and to establish and maintain a dynamic network topology. By periodically exchanging heartbeat signals, the status of the communication link with the adjacent main control unit is monitored, and when the heartbeat signal is lost, the neighboring street light node corresponding to the adjacent main control unit is identified as a faulty node. In response to the confirmation of the faulty node, the routing path of the data packets is dynamically reconstructed to bypass the faulty node; When the faulty node is confirmed and the routing path of the data packet is reconstructed, a lighting compensation command signal is sent to the compensation control unit of other adjacent street light nodes of the faulty node.

[0024] In the specific implementation process, the main control unit is the control center of each street light node, responsible for communication, network management and control decisions. It has a built-in Mesh communication module and network topology management module, which enables the street light node to have autonomous networking and intelligent control capabilities. The driver module is used to drive the LED light source to emit light and includes a power conversion unit, a compensation control unit, and a drive control unit.

[0025] The Mesh communication module supports multi-hop transmission and self-organizing network functions. During operation, the Mesh communication module is responsible for establishing communication connections with the main control units of other physically adjacent street light nodes, receiving, sending, and forwarding data packets. The data packets include control commands, status information, heartbeat signals, etc. Through multi-hop transmission, the data packets travel from the source node through multiple intermediate nodes to the destination node. Even if there are obstacles between nodes, communication coverage can be ensured. During initialization, the Mesh communication module automatically scans available channels, selects channels with less interference for communication, and supports dynamic channel switching to avoid interference.

[0026] The network topology management module performs functions such as neighbor discovery and networking, link status monitoring and fault node confirmation, route path reconstruction, and lighting compensation command generation, wherein: Neighbor Discovery and Networking: During system initialization and periodic intervals, the network topology management module sends a broadcast discovery signal through the Mesh communication module. This signal contains the unique identifier of the node. After receiving the signal, the neighboring main control unit within the communication range returns a response signal containing its own identifier. The main control unit and all responding neighboring main control units exchange identifiers and link status information, jointly forming and maintaining a distributed network topology graph within the communication range. The topology graph is stored in a graph structure, where nodes represent street light main control units and edges represent communication links. The networking process is completely distributed and requires no central server intervention, improving the system's robustness and scalability.

[0027] Link status monitoring and fault node confirmation: The network topology management module sends data request packets as heartbeat signals to each neighbor master control unit in the network topology map at fixed intervals through the Mesh communication module. If no data response packet is received from a neighbor master control unit within a preset time window, a fault count is started. When the number of consecutive failures to receive heartbeat response packets exceeds a first preset threshold, the network topology management module determines that the neighbor street light node corresponding to that neighbor master control unit is a faulty node. The fault may be caused by power failure, hardware damage, or communication failure. After determination, the module updates the local topology map and marks the node as faulty.

[0028] Dynamic route path reconstruction: Once a faulty node is confirmed, the network topology management module removes all connection information of the faulty node from the maintained network topology graph, forming an updated topology graph. Based on the new topology graph, a new communication path to the destination node is recalculated using a routing algorithm. This invention uses a routing algorithm to calculate the shortest path, and the specific steps are as follows: Parameter initialization: Get the set of all street light nodes in the network topology graph. The set of street light nodes with the shortest path has been determined as follows: The set of street light nodes for which the shortest path has not been determined is: Street light nodes With street light nodes The link weights between them are Street light nodes To the destination street light node The shortest path length is The target street light node in the updated network topology graph Set The remaining street light nodes are grouped into a set. ,initialization For all and , Among them, link weight , , and The weighting coefficients are and satisfy the following conditions: , Streetlight nodes and The normalized value of physical distance, Streetlight nodes and Packet loss rate of the communication link between them Streetlight nodes and The average transmission delay of the communication link between them; Link weight calculation: Collect the physical distance, link packet loss rate, and average transmission delay of all adjacent street light node pairs in the updated network topology map, and calculate the link weight between each pair of adjacent street light nodes. ; Optimal node selection: from the set Selected from The street light node with the smallest value Street light nodes From the set Remove and add to set ; Shortest path update: Traverse street light nodes All adjacent street light nodes When the street light node Still in the collection In the middle, then according to Recalculate Keep the current smallest Value as street light node To the destination street light node The latest shortest path length; Iteration termination check: Repeat the optimal node selection and shortest path update until the set is reached. If empty, then all street light nodes are connected to the destination street light node. The shortest paths from the current street light node to the destination street light node have all been determined. The shortest path is the optimal communication path after reconstruction.

[0029] Lighting compensation command generation and transmission: When a faulty node is confirmed and route reconstruction is initiated, the network topology management module sends lighting compensation command signals to the compensation control units of other adjacent street light nodes of the faulty node through the Mesh communication module. The commands include parameters such as compensation intensity and duration to ensure coordinated compensation between adjacent nodes.

[0030] The driver module is responsible for driving the LED light source to emit light and adjusting the output power according to the control command to realize dimming and compensation lighting. It includes a power conversion unit, a compensation control unit and a driver control unit.

[0031] The power conversion unit converts the input electrical signal into a DC voltage compatible with the LED light source. In this embodiment, the power conversion unit includes a rectifier, a power factor correction circuit, and a DC-DC converter to ensure efficient and stable power output and reduce energy loss.

[0032] The compensation control unit receives the lighting compensation command signal from the main control unit, parses the command, and generates a control signal for the drive control unit. In this embodiment, the compensation control unit is implemented by a microprocessor and can calculate the required power increase based on the compensation command. For example, it can increase the power by 20%-50% on the basis of conventional lighting to compensate for the dark areas caused by fault nodes.

[0033] The drive control unit adjusts the driving power output to the LED light source based on the output signal from the compensation control unit. In this embodiment, pulse width modulation or constant current driving is used to control the brightness and color temperature of the LED. Upon receiving a compensation command, the drive control unit increases the output power based on the original lighting power to ensure uniform local lighting.

[0034] Specifically, such as Figure 1The flowchart shown illustrates an energy-saving intelligent control system for urban road lighting, detailing the specific steps involved in intelligent control of road lighting within this system. (1) System initialization and network self-organization System power-on startup: Power is supplied to all street light nodes, the main control unit and drive module of each node start working, and the LED light source enters the default lighting state.

[0035] Broadcasting neighbor discovery signal: During the initialization phase, the main control unit of each street light node periodically broadcasts a discovery signal containing its own identity identifier through its Mesh communication module.

[0036] Establishing neighbor relationships: After receiving the discovery signal, the neighbor's main control unit within the communication range returns a response signal containing its own identity identifier.

[0037] Building a network topology map: The initiator and responder main control units exchange identity identifiers and link status information with each other, and their respective network topology management modules record and maintain these connections locally, ultimately forming a distributed and dynamic Mesh network topology map throughout the entire road area.

[0038] (2) Routine operation and status monitoring Periodic heartbeat detection: After the system enters a stable operating state, each main control unit will periodically send heartbeat request packets to its neighboring main control units through the Mesh communication module.

[0039] Link status assessment: The sending main control unit starts a timer and waits to receive the heartbeat response packet returned by the other party.

[0040] Preliminary fault assessment: If no response packet is received from a specific neighbor within a preset time window, the network topology management module will start a fault count for that neighbor.

[0041] (3) Fault detection and confirmation Fault Confirmation: When the fault count for the same neighbor exceeds the preset threshold consecutively, the network topology management module determines that the street light node corresponding to the main control unit of that neighbor is a faulty node.

[0042] (4) Linkage response and fault handling Triggering the communication self-healing mechanism: Upon detecting a fault, the main control unit's network topology management module immediately removes all connection information of the faulty node from the locally maintained network topology graph.

[0043] Based on the updated topology, the routing algorithm is activated to recalculate the transmission paths of all affected data packets. The newly calculated paths will automatically bypass the faulty node and relay data transmission through other healthy neighboring main control units, forming a reconstructed communication link after the fault, ensuring that system commands are reachable.

[0044] Synchronous triggering of lighting compensation mechanism: At the same moment the route reconfiguration is initiated, the main control unit that detected the fault generates a specific lighting compensation command signal.

[0045] The command signal is precisely sent via the Mesh communication module to the two compensation control units directly adjacent to the physical location of the faulty node, i.e., the main control units of the adjacent street light nodes.

[0046] Perform lighting compensation: Upon receiving the instruction, the compensation control unit immediately analyzes the signal.

[0047] After analysis, the compensation control unit sends control commands to the drive module of this node.

[0048] In response to this command, the compensation control unit in the drive module drives the drive control unit to increase the output power, so that the LED light source of this node increases the power by a preset amount on the basis of the basic brightness, thereby expanding its illumination coverage range and optically compensating for the local dark areas caused by the failure of the node.

[0049] (5) System recovery and rebalancing Fault repair and node return: When a faulty node is manually repaired and powered back on, its main control unit automatically re-executes the first phase of the neighbor discovery and networking process, integrates into the Mesh network, and sends a recovery notification to its neighbors.

[0050] Release of compensation status: After receiving a recovery notification and confirming through heartbeat detection that the node has returned to normal, the adjacent compensation control unit automatically sends a command to its drive module to release the lighting compensation status. The brightness of the LED light source of the node is restored to the normal lighting mode, and the system returns to the initial equilibrium state.

[0051] In summary, this invention constructs a complete intelligent lighting system, from distributed networking and intelligent topology management to active compensation, through the collaborative work of various modules. The modules are closely connected and the data flow is clear, which together ensures the high reliability, high energy efficiency and intelligence of the system, providing an effective technical solution for solving the problem of large-scale urban road lighting management.

[0052] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. An energy-saving urban road lighting intelligent control system, characterized in that, The system comprises a plurality of street lamp nodes, each of which comprises an LED light source, a main control unit and a driving module for driving the LED light source; The main control unit comprises a Mesh communication module and a network topology management module, wherein: The Mesh communication module is configured to establish a communication connection with other neighbor main control units in the street lamp nodes, receive, send and forward data packets, and form a distributed self-organizing network; The network topology management module is configured to perform the following operations: Neighbor street lamp node discovery and networking are performed through the Mesh communication module to establish and maintain a dynamic network topology map; The communication link state with the adjacent main control unit is monitored through periodic heartbeat signal interaction, and when the heartbeat signal is lost, it is determined that the neighbor street lamp node corresponding to the adjacent main control unit is a faulty node; In response to the determination of the faulty node, the routing path of the data packet is dynamically reconstructed to bypass the faulty node; When the faulty node is determined and the routing path of the data packet is reconstructed, a lighting compensation instruction signal is sent to the compensation control unit of the other adjacent street lamp node of the faulty node.

2. The energy-saving intelligent control system for urban road lighting according to claim 1, characterized in that, The network topology management module specifically comprises: The main control unit sends a broadcast discovery signal through the Mesh communication module at initialization and at periodic intervals; The neighbor main control units within the communication range of the main control unit return a response signal containing their own unique identity after receiving the signal; The main control unit and all responding neighbor main control units exchange identity and link state information with each other to form and maintain a distributed network topology map within the communication range.

3. The energy-saving intelligent control system for urban road lighting according to claim 1, characterized in that, The specific steps of the network topology management module for monitoring the communication link state and determining the faulty node are as follows: The main control unit sends a data request packet to each neighbor main control unit in the network topology map through the Mesh communication module at a fixed period; When no data response packet from the neighbor main control unit is received within a preset time window, a fault count is started; When the number of consecutive times of not receiving a heartbeat response packet exceeds a first preset threshold, the network topology management module determines that the neighbor street lamp node corresponding to the neighbor main control unit is a faulty node.

4. The energy-saving intelligent control system for urban road lighting according to claim 1, characterized in that, The specific steps of the network topology management module for dynamically reconstructing the routing path of the data packet are as follows: When the determined faulty node exists, the network topology management module of the main control unit removes all connection information of the faulty node from the maintained network topology map; Based on the updated network topology map, a new communication path to the destination node is recalculated using a routing algorithm, the new communication path bypasses the faulty node and is transmitted by multiple neighbor main control units to form a reconstructed communication link after failure.

5. The energy-saving intelligent control system for urban road lighting according to claim 4, characterized in that, The specific steps of the routing algorithm for calculating the new communication path are as follows: Parameter initialization: obtain the set of all streetlight nodes in the network topology graph , the set of streetlight nodes for which the shortest path has been determined is , the set of streetlight nodes for which the shortest path has not been determined is , the link weight between streetlight node and streetlight node is , the shortest path length from streetlight node to the destination streetlight node is , the destination streetlight node in the updated network topology graph is assigned to the set , the remaining streetlight nodes are assigned to the set , initialize , for all and , , where the link weight , , and are weight coefficients and satisfy , is the normalized value of the physical distance between streetlight node and , is the packet loss rate of the communication link between streetlight node and , is the average transmission delay of the communication link between streetlight node and ; Link weight calculation: Collect the physical distance, link packet loss rate and average transmission delay of all adjacent pairs of street lamp nodes in the updated network topology graph, and calculate the link weight between each pair of adjacent street lamp nodes ; Optimal node selection: from the set Selected from The street light node with the smallest value Street light nodes From the set Remove and add to set ; Shortest path update: Traverse street light nodes All adjacent street light nodes When the street light node Still in the collection In the middle, then according to Recalculate Keep the current smallest Value as street light node To the destination street light node The latest shortest path length; Iteration termination judgment: repeatedly execute optimal node selection and shortest path update until the set is empty, at which time the shortest paths from all street lamp nodes to the destination street lamp node have been determined, and the shortest path from the current street lamp node to the destination street lamp node is the optimal communication path after reconstruction.

6. The energy-saving intelligent control system for urban road lighting according to claim 1, characterized in that, The driving module is configured to drive the LED light source to emit light, and comprises a power conversion unit, a compensation control unit and a driving control unit, wherein: The power conversion unit is configured to convert an input electrical signal into a direct current voltage suitable for the LED light source; The compensation control unit is configured to receive the lighting compensation instruction and control the output power of the driving control unit. The driving control unit is configured to adjust the driving power output to the LED light source.

7. The energy-saving intelligent control system for urban road lighting according to claim 1, characterized in that, After the network topology management module generates and sends the lighting compensation instruction signal, the response mode of the driving module is as follows: The other neighbor master control units adjacent to the fault node receive the lighting compensation instruction signal through the Mesh communication module. The master control unit analyzes the lighting compensation instruction signal and controls the driving module. The driving module drives the driving control unit of the local street lamp node to increase the power amplitude on the basis of the original lighting power, so as to compensate for the local lighting dark area caused by the extinguishing of the fault node.

8. The energy-saving intelligent control system for urban road lighting according to claim 7, characterized in that, When the fault node is repaired and reconnected, the master control unit of the fault node establishes a communication connection with other neighbor master control units in the street lamp node through the Mesh communication module, forms a self-organizing network, and sends a recovery notification to the neighbor street lamp node. After the master control unit of the neighbor street lamp node confirms that the fault node is normal, the lighting compensation state is automatically released, and the driving module of the fault node restores the LED light source to the normal lighting mode.

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