Elevator energy-saving and safety cooperation system and method based on wireless Mesh network

Abstract

The invention discloses an elevator energy-saving and safety collaboration system and method based on a wireless Mesh network, and relates to the technical field of elevators, the elevator energy-saving and safety collaboration system comprises an energy storage device connected with a power grid and used for recycling and releasing electric energy; an elevator device as an energy conversion and consumption unit; the number of the wireless communication modules corresponds to the number of the energy storage devices and the number of the elevator devices, and the wireless communication modules are connected with the energy storage devices and the elevator devices through communication interfaces; and the gateway machine is connected with the plurality of wireless communication modules in a wireless mode to form a self-organized Mesh network. According to the invention, the energy storage standby power supply is utilized to maintain online communication and sensing during power failure, remote active rescue is supported, and the safety is greatly improved.

Description

Technical Field

[0001] This invention relates to the field of elevator technology, and in particular to an elevator energy-saving and safety collaborative system and method based on a wireless mesh network. Background Technology

[0002] With the evolution of elevator technology, single-function elevator systems can no longer meet the needs of modern buildings. Among the existing technologies, patent CN119503569A proposes an elevator wireless monitoring system, which realizes remote interaction between the elevator and the cloud platform through a wireless communication module; patent CN121395078A proposes an elevator energy feedback system, which introduces an energy storage unit to recover and regenerate electrical energy to achieve energy saving.

[0003] The aforementioned patents demonstrate that modern elevator systems are gradually evolving into hybrid systems integrating subsystems from multiple fields, such as remote monitoring and energy management. However, existing technologies still have the following shortcomings: Different subsystems often use their own independent communication protocols and hardware interfaces, making it difficult for them to interconnect. Building a hybrid system of elevator + energy storage + cloud platform requires laying a large number of dedicated cables and performing protocol conversion, resulting in high transformation costs and great implementation difficulties.

[0004] Furthermore, existing communication architectures are mostly based on periodic reporting or point-to-point transmission, which is insufficient to meet the millisecond-level collaborative control requirements between elevators and energy storage devices. When the elevator is in generator mode, the energy storage device cannot obtain instantaneous power data in real time and switch to charging mode promptly, resulting in a large amount of regenerated energy being wasted by the braking resistor, leading to low energy recovery efficiency. When the mains power fails, the communication link is interrupted along with the main power supply failure. Although the energy storage device stores electrical energy, it cannot establish a connection with the elevator, making it unable to drive emergency leveling rescue, posing a safety hazard. Summary of the Invention

[0005] The main objective of this invention is to provide an elevator energy-saving and safety collaborative system and method based on a wireless mesh network, aiming to solve the technical problems of the separation of energy and information systems and the lack of collaborative control in existing elevator energy-saving systems, namely, the inability of energy storage and elevator to link in real time, resulting in low energy recovery efficiency and the inability to coordinate in emergencies.

[0006] To achieve the above objectives, this invention proposes an elevator energy-saving and safety collaborative system based on a wireless mesh network, comprising: Energy storage devices, connected to the power grid, are used to recover and release electrical energy; Elevator equipment serves as an energy conversion and consumption unit; Multiple wireless communication modules are provided, with the number of wireless communication modules corresponding to the number of energy storage devices and elevator equipment. The wireless communication modules are connected to the energy storage devices and elevator equipment through communication interfaces. The gateway unit connects wirelessly to multiple wireless communication modules to form a self-organizing mesh network; among them... The gateway receives and integrates the state of charge and chargeable / dischargeable power of the energy storage device through the Mesh network, as well as the instantaneous power and running direction of the elevator. Based on the instantaneous power and running direction, it generates control commands through a cooperative control strategy. The gateway also distributes the control commands to the energy storage device through the Mesh network and the corresponding wireless communication module to control the energy storage device to recover electrical energy when the elevator is in power generation mode and release electrical energy when the elevator is in electric mode.

[0007] Furthermore, the Mesh network is built using Zigbee or LoRa protocols; when the direct communication link between any wireless communication module and the gateway is interrupted, data packets are relayed through other wireless communication modules to form redundant communication links.

[0008] Furthermore, the energy storage device also includes an independent backup power output line, which is directly connected to the battery cells of the energy storage device, and is used to continuously supply power to the gateway and the wireless communication module connected to the energy storage device when the main power supply fails.

[0009] Furthermore, the wireless communication module connected to the elevator equipment is configured with dual redundant power supply, with the main route drawing power from the elevator control cabinet and the backup route being powered by the backup power output line of the energy storage device.

[0010] Furthermore, collaborative control strategies include: When the elevator equipment is in power generation mode and the state of charge of the energy storage device is lower than a preset threshold, a control energy recovery command is generated to control the energy storage device to recover energy. When the elevator equipment is in electric operation and the state of charge of the energy storage device is higher than a preset threshold, a control energy release command is generated to control the energy storage device to release energy.

[0011] Furthermore, the gateway is also connected to the Internet to upload device operating status data to the cloud platform; In addition, it receives remote instructions or firmware upgrade packages from the cloud platform and distributes OTA firmware upgrade packages from the cloud platform to each wireless communication module in batches through the Mesh network to achieve remote synchronous upgrade of the wireless communication modules.

[0012] This invention also proposes an elevator emergency collaborative control method, characterized by comprising the following steps: S10, when the main power supply fails, the gateway and at least some wireless communication modules switch to the backup power supply of the energy storage device; after the wireless communication module connected to the elevator equipment detects the failure of the main power supply, it generates an alarm message; S20: Alarm information is transmitted to the gateway via the Mesh network and then uploaded to the cloud platform via the gateway. The gateway receives remotely issued emergency commands through the cloud platform. S30, the energy storage device starts the main discharge circuit to supply power to the elevator equipment according to the emergency command; the elevator equipment executes the preset emergency rescue operation according to the emergency command.

[0013] Furthermore, the power outage sensing step is followed by a status confirmation step: The cloud platform or maintenance terminal requests the status information inside the car and / or the remaining power information of the energy storage device through the gateway to assist in rescue decision-making.

[0014] Further emergency rescue operations include: the elevator equipment moving at low speed to the nearest floor and opening the door.

[0015] Furthermore, during emergency rescue operations, each wireless communication module continuously transmits the elevator's location and status information to the cloud platform via the Mesh network and gateway.

[0016] This invention achieves millisecond-level dynamic collaborative control of energy storage and elevators by deeply integrating energy flow and information flow through a mesh network, maximizing the recovery of regenerated electrical energy and significantly improving energy efficiency; it constructs a highly reliable communication link without single points of failure to ensure stable system operation; and by utilizing backup power from energy storage to maintain online communication and sensing during power outages, it supports remote proactive rescue and greatly enhances safety; at the same time, wireless deployment and OTA remote upgrades significantly reduce engineering and maintenance costs, giving the system strong scalability. Attached Figure Description

[0017] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the module structure of the elevator energy-saving and safety collaborative system based on a wireless mesh network according to the present invention. Figure 2 This is a block diagram of the distributed device wireless network monitoring system of the elevator energy-saving and safety collaborative system based on wireless mesh network of the present invention; Figure 3This is a block diagram of the energy storage backup power strategy of the elevator energy-saving and safety collaborative system based on a wireless mesh network according to the present invention. Figure 4 This is a flowchart illustrating the elevator energy-saving and safety collaborative method based on a wireless mesh network according to the present invention.

[0020] The objectives, features, and advantages of this invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0021] It should be understood that the specific embodiments described herein are merely illustrative of the technical solutions of the present invention and are not intended to limit the present invention.

[0022] To better understand the technical solution of the present invention, a detailed description will be provided below in conjunction with the accompanying drawings and specific embodiments.

[0023] like Figure 1 As shown, Figure 1 This is a schematic diagram of the module structure of the elevator energy-saving and safety collaborative system based on a wireless mesh network according to the present invention.

[0024] Reference Figure 1 The elevator energy-saving and safety collaborative system based on wireless mesh networks includes: Energy storage devices, connected to the power grid, are used to recover and release electrical energy; Elevator equipment serves as an energy conversion and consumption unit; Multiple wireless communication modules are provided, with the number of wireless communication modules corresponding to the number of energy storage devices and elevator equipment. The wireless communication modules are connected to the energy storage devices and elevator equipment through communication interfaces. The gateway unit connects wirelessly to multiple wireless communication modules to form a self-organizing mesh network; among them... The gateway receives and integrates the state of charge and chargeable / dischargeable power of the energy storage device through the Mesh network, as well as the instantaneous power and running direction of the elevator. Based on the instantaneous power and running direction, it generates control commands through a cooperative control strategy. The gateway also distributes the control commands to the energy storage device through the Mesh network and the corresponding wireless communication module to control the energy storage device to recover electrical energy when the elevator is in power generation mode and release electrical energy when the elevator is in electric mode.

[0025] This system adopts a modular design, allowing for flexible configuration of the number of wireless communication modules based on the actual number of elevators. A single gateway can simultaneously connect to up to 32 wireless communication modules, covering all elevators and related equipment in the entire building. The communication distance between the gateway and each wireless communication module can reach 200 meters in open environments, and in complex environments such as elevator machine rooms and shafts, multi-hop relays can cover the entire building.

[0026] In this embodiment, the energy storage device is installed in the elevator machine room, integrating a battery module, a bidirectional converter (PCS), and a controller. The energy storage device captures the regenerative energy generated by the elevator in real time during power generation conditions (heavy load downward movement, light load upward movement), preventing it from being wasted by the braking resistor and efficiently storing the energy. When the elevator is in electric operation conditions (heavy load upward movement, light load downward movement) or during peak building electricity consumption, the stored energy is released to power the elevator or other equipment. Simultaneously, the energy storage device acts as a power buffer, effectively smoothing the instantaneous power impact on the power grid caused by elevator start-up and shutdown, reducing the building's transformer capacity requirements and peak electricity costs.

[0027] Furthermore, the energy storage device's battery modules use lithium iron phosphate batteries, with a single cell voltage of 3.2V and a capacity of 50Ah. 100 cells are connected in series to form a battery pack with a nominal voltage of 320V and a total capacity of 50Ah, resulting in a total energy storage capacity of 16kWh. The bidirectional converter (PCS) has a rated power of 15kW, supports bidirectional energy flow, and has a charging efficiency of 94% and a discharging efficiency of 93%. The main discharge circuit of the energy storage device is connected to the elevator power bus via a contactor for daily energy recovery and emergency power supply. The backup power output line is independent of the main discharge circuit, outputting a stable DC 48V / 10A power supply via a DC-DC converter to provide backup power for the gateway and wireless communication module.

[0028] In this embodiment, the elevator equipment acts as an energy converter within the system, switching between electric and generator modes. It is both the primary energy producer and consumer. The elevator equipment generates crucial operational data in real time, including direction of travel, load, speed, current power (positive or negative), and current floor. This data serves as the most important input for the system's intelligent decision-making. Simultaneously, the elevator equipment receives optimization instructions from the gateway, such as adjusting the operating curve and coordinating with energy storage charging and discharging, to achieve energy-saving operation.

[0029] Furthermore, the elevator frequency converter adopts a VVVF frequency converter with energy feedback function, with a rated power of 15kW, supporting regenerative energy feedback to the DC bus. The frequency converter outputs real-time operating data to the outside world through the CAN bus, with a data refresh cycle of 50ms, including: running direction (up / down), load (0-115% of rated load), speed (0-2.5m / s), instantaneous power (-15kW to +15kW, negative values ​​indicate power generation), current floor (1-32 floors), and operating status (acceleration / constant speed / deceleration / stop), etc.

[0030] In this embodiment, the wireless communication module acts as the neural network of the entire system, replacing the traditional complex wiring harness. The wireless communication module includes module A, installed on the energy storage controller, and module B, installed inside the elevator control cabinet. Module A is connected to the energy storage controller and is used to collect data such as the battery's state of charge (SOC), chargeable and dischargeable power, and temperature, and can receive and execute charge and discharge commands. Module A's main power supply is taken from inside the energy storage device, and its control circuit is simultaneously connected to a DC 48V backup power line to ensure that the module can still operate when the main circuit is disconnected. Module B is connected to the elevator inverter via a CAN bus and is used to collect data such as the elevator's running direction, load, instantaneous power, speed, and current floor, and can receive and execute control commands. Module B's power supply is designed with dual redundant power supply: the main route draws power from the elevator control cabinet's AC 220V, and the backup route is powered by a DC 48V backup power line. When the main power supply fails, module B seamlessly switches to the backup power supply, ensuring uninterrupted communication. Each wireless communication module can independently collect detailed data from the corresponding device and report it to the gateway. At the same time, it can receive control commands from the gateway and forward them to local actuators, such as energy storage converters (PCS) or elevator controllers.

[0031] In this embodiment, the gateway is deployed in a location with optimal network coverage, such as a server room. Its main power supply is also connected to a DC 48V backup power line, and it is connected to an Ethernet or 4G / 5G network to connect to the Internet. The gateway receives data from all wireless communication modules, including energy storage status, elevator status, and other equipment status. After data fusion processing, it sends precise control commands to the controller of the energy storage device and the frequency converter of the elevator, enabling them to work together. Simultaneously, the gateway acts as a bridge between the local area network and the Internet, encrypting and uploading data to the cloud platform, and receiving remote commands or policy updates from the cloud, enabling OTA remote upgrades.

[0032] In this embodiment, each wireless communication module and the gateway device construct a self-organizing mesh network using the Zigbee or LoRa protocol. Upon power-up, each module automatically broadcasts beacons to find neighboring nodes and automatically negotiates to form a multi-hop mesh topology without manual configuration. When the direct communication link between any wireless communication module and the gateway device is interrupted, data packets can be relayed through other wireless communication modules, forming redundant communication links and greatly improving system reliability.

[0033] Furthermore, the Mesh network employs an On-Demand Routing (AODV) protocol, where each node dynamically maintains its routing table. When the network topology changes (e.g., a node joins / leaves, or link quality degrades), the system automatically reconstructs the route within 500ms. The network layer supports multi-path transmission, allowing critical data to be sent simultaneously via 2-3 different paths, ensuring an end-to-end transmission success rate greater than 99.5%. The network supports up to 16 hops of relay, and its coverage can be extended to over 800 meters.

[0034] Furthermore, the gateway is also connected to the Internet to upload device operating status data to the cloud platform; and to receive remote instructions or firmware upgrade packages from the cloud platform, and to distribute OTA firmware upgrade packages from the cloud platform to each wireless communication module in batches through the Mesh network, so as to realize remote synchronous upgrade of the wireless communication modules.

[0035] like Figure 2 As shown, Figure 2 This is a block diagram of the distributed device wireless network monitoring system of the elevator energy-saving and safety collaborative system based on wireless mesh network of the present invention.

[0036] Reference Figure 2 In this mesh network, if the direct communication link from any node to the gateway is interrupted, data packets can be relayed through other nodes (such as module A or subsequently added modules C and N), forming redundant communication links. This greatly improves the communication reliability of the system in complex industrial environments. Furthermore, the gateway device has a pre-stored collaborative control strategy, which includes: when the elevator equipment is in power generation mode and the state of charge of the energy storage device is lower than a preset threshold, generating a control energy recovery command to control the energy storage device to recover energy; when the elevator equipment is in power generation mode and the state of charge of the energy storage device is higher than a preset threshold, generating a control energy release command to control the energy storage device to release energy.

[0037] Furthermore, the collaborative control strategy employs a fuzzy logic control algorithm, comprehensively considering factors such as elevator instantaneous power, running direction, energy storage SOC, and time-based electricity price to dynamically optimize energy allocation. Preset thresholds can be flexibly configured according to actual needs: the default charging start threshold is set to SOC < 90%, and the default discharging start threshold is set to SOC > 30%. It also supports time-of-use pricing strategies, prioritizing energy storage discharging during peak electricity price periods (e.g., 10:00-12:00, 18:00-20:00) and prioritizing grid power drawing and charging of the energy storage during off-peak electricity price periods (e.g., 23:00-7:00).

[0038] The following uses a complete "energy recovery-reuse" cycle as an example to explain in detail the specific working method of the present invention: The elevator enters a heavy-load downward power generation state, and the elevator inverter calculates the current feedback power as -15kW in real time. Wireless communication module B collects this power value, current load, operating speed, floor information, etc., every 100ms, packages it, and sends it to the gateway via the Mesh network. Simultaneously, wireless communication module A collects information such as the battery pack SOC (currently 60%), temperature, and rechargeable power of the energy storage device at the same interval and reports it to the gateway. The data packets are encapsulated in JSON format, containing fields such as device ID, timestamp, data type, and data value, with a single data packet size of approximately 128 bytes. The Mesh network uses a TDMA+CSMA hybrid access method to ensure that all node data can be successfully uploaded within the 100ms period, with a network collision probability of less than 0.1%.

[0039] Furthermore, after receiving the aforementioned multi-source data, the gateway device runs its built-in collaborative control algorithm. The algorithm makes a judgment based on a preset strategy (e.g., initiating charging when SOC < 90% and feedback power > 5kW), and instantly makes a decision: instructing the energy storage device to charge at 15kW power, and instructing the elevator inverter to direct the feedback energy to the energy storage device instead of the braking resistor. The gateway device then generates specific messages for the energy storage controller and the elevator controller, respectively, based on these control commands.

[0040] Furthermore, control commands are transmitted via the Mesh network to wireless communication module A and wireless communication module B respectively. Module A parses the commands and sends them to the energy storage to start the charging program through its local interface; module B parses the commands and sends them to the elevator inverter, which adjusts its energy feedback path. If a node on the command transmission path does not respond, the Mesh network will automatically activate a backup path and retransmit within tens of milliseconds to ensure reliable delivery of the commands.

[0041] Furthermore, the gateway will upload key data of this energy recovery event (time, recovered electricity, energy-saving benefits, equipment status) to the cloud management platform via 4G network or Ethernet. Elevator or property management personnel can view the elevator's real-time energy-saving data and system health status through a mobile app or webpage.

[0042] Through the aforementioned high-frequency data synchronization and millisecond-level collaborative control, the system can accurately capture and instantly recover regenerated electrical energy, significantly improving the overall energy-saving rate. Simultaneously, the energy storage device, acting as a power buffer, effectively smooths the instantaneous power surge from the elevator to the power grid, reducing the building's transformer capacity requirements and peak electricity costs.

[0043] Traditional wired systems have fixed ports, and expanding functionality requires rewiring, which is almost impossible. The system of this invention has high wireless scalability: like Figure 2As shown, to add monitoring of the elevator braking resistor temperature, only a wireless module N needs to be added next to the resistor cabinet, connected to the temperature sensor via an RS-485 interface. After module N is powered on, it automatically broadcasts a beacon, discovers and joins the existing Mesh network within milliseconds. The gateway automatically identifies the new node's ID and data type and begins receiving its real-time temperature data. The entire process requires no downtime, no wiring, and no modification to any existing equipment wiring. Similarly, other energy-consuming equipment such as building lighting and air conditioning only needs to be configured with corresponding wireless device nodes and connected to the original device controller via a standard RS-485 / CAN interface. Reliable communication can then be established with the gateway via a Zigbee / LoRa multi-hop network, smoothly extending the elevator energy-saving system into an energy microgrid covering the entire building.

[0044] Furthermore, maintenance personnel can use tablets equipped with a dedicated app to directly access the Mesh LAN via Zigbee / LoRa wireless channels within the system's coverage area. No physical debugging cables are required to complete parameter configuration, log download, and online diagnostics for all devices. System firmware upgrades also eliminate the need for on-site manual intervention: the gateway receives the OTA upgrade package pushed from the cloud via the cellular network and distributes it in batches to all wireless modules through the Mesh network; each node automatically verifies and restarts upon receiving the package, achieving network-wide synchronization with a single distribution, significantly improving maintenance efficiency.

[0045] like Figure 3 As shown, Figure 3 This is a block diagram of the energy storage backup power supply strategy for the elevator energy-saving and safety collaborative system based on a wireless mesh network, as described in this invention.

[0046] Reference Figure 3 , Figure 3 This is a block diagram of the energy storage backup power supply strategy for the elevator energy-saving and safety collaborative system based on a wireless mesh network, as described in this invention. The system is divided into two main branches: the main energy circuit and the emergency communication power supply circuit. The upper branch is the energy recovery and emergency power supply path, specifically configured as follows: the industrial frequency AC power input from the three-phase power grid is converted into DC power by a rectifier and then supplied to the elevator converter. The elevator converter has bidirectional functionality; it can invert DC power into variable frequency AC power to drive the elevator in motoring mode, and it can also rectify the regenerative energy generated by the motor into DC power in generator mode (such as heavy-load descent). This DC power is further voltage-matched and isolated by a DC / DC converter before being efficiently transmitted to an energy storage device for storage. Conversely, in emergency situations, the DC power stored in the energy storage device can be transmitted through the same path, via DC / DC conversion and inversion, to provide suitable power for emergency elevator leveling.

[0047] The lower branch is a dual-redundant power supply path for the wireless communication system. Specifically, the main power supply for the wireless communication module is provided by a three-phase power grid. Simultaneously, the energy storage device provides backup power to the wireless communication module through a standby power line independent of the main energy circuit, outputting a stable DC48V via DC-DC conversion. The wireless communication module employs a dual-power supply design, allowing seamless switching to the backup power supply in the event of a main power failure, thus maintaining uninterrupted Mesh network communication links and providing reliable assurance for emergency alarms and command transmission.

[0048] Through the synergy of the two main branches mentioned above, the system of this invention achieves efficient recovery of elevator regenerative energy under normal operating conditions, as well as dual safety protection functions of keeping the communication link alive and elevator emergency rescue under emergency conditions.

[0049] like Figure 4 As shown, Figure 4 This is a flowchart illustrating the elevator energy-saving and safety collaborative method based on a wireless mesh network according to the present invention.

[0050] Reference Figure 4 The present invention also proposes an elevator emergency collaborative control method, characterized by comprising the following steps: S10, when the main power supply fails, the gateway and at least some wireless communication modules switch to the backup power supply of the energy storage device; after the wireless communication module connected to the elevator equipment detects the failure of the main power supply, it generates an alarm message; S20: Alarm information is transmitted to the gateway via the Mesh network and then uploaded to the cloud platform via the gateway. The gateway receives remotely issued emergency commands through the cloud platform. S30, the energy storage device starts the main discharge circuit to supply power to the elevator equipment according to the emergency command; the elevator equipment executes the preset emergency rescue operation according to the emergency command.

[0051] In this embodiment, the specific process by which the system realizes emergency sensing, communication, and rescue in the event of a power grid outage includes: Under the default conditions, the energy storage device is equipped with an independent backup power output line (DC48V) and provides dual redundant power supply for the gateway and wireless module B; the Mesh network has been established normally.

[0052] In this embodiment, the system presets emergency parameters: the emergency threshold for energy storage SOC is set to 30%, and when the SOC is lower than this threshold, emergency leveling is prohibited, and only communication alarms are maintained; the emergency leveling operation speed is set to 0.3m / s (low speed mode) to ensure safety; the leveling target selection principle is the nearest floor, and if the nearest floor fails, the second nearest floor is selected.

[0053] S10, when the main power supply fails, the gateway and at least some wireless communication modules switch to the backup power supply of the energy storage device; after the wireless communication module connected to the elevator equipment detects the failure of the main power supply, it generates an alarm message; In this embodiment, when the power grid suddenly fails, the main power supply of the elevator control system is lost, and the elevator stops operating. The elevator-side wireless communication module and gateway switch to power from the energy storage backup power line instantly (<20ms), ensuring that the communication hardware remains powered on and does not restart. The elevator main controller stops working due to the power failure, but the wireless communication module connected to it immediately determines "elevator main power failure" by detecting the inactivity of its communication interface or its own power supply switching event. The wireless communication module packages the "main power failure" event, its own location (elevator number), timestamp, and other information, and sends it to the gateway through the established Mesh wireless network. The gateway uploads this emergency alarm information to the cloud monitoring platform immediately through its built-in 4G / 5G module (powered by the backup power supply). The platform generates an audible and visual alarm, locates the faulty elevator on the digital map, automatically dispatches a work order to the maintenance personnel's mobile app, and sends an alarm notification to the property management personnel.

[0054] Furthermore, the alarm information includes key data such as the elevator's unique ID, power outage time, the last floor and direction of travel reported before the power outage, and the energy storage SOC. Upon receiving the alarm, the cloud platform completes information analysis and work order dispatch within 10 seconds, and simultaneously notifies relevant personnel via SMS, app push notifications, and email.

[0055] S20: Alarm information is transmitted to the gateway via the Mesh network and then uploaded to the cloud platform via the gateway. The gateway receives remotely issued emergency commands through the cloud platform. In this embodiment, after receiving an alarm, the back-end maintenance personnel can proactively request the elevator's wireless communication module to report more information through the platform, such as whether there are passengers in the car (determined by connected light curtain or camera sensor nodes, which need to be integrated in advance) and the remaining power (SOC) of the energy storage device. Based on the information analysis, if it is determined that there are passengers trapped in the car and the energy storage power is sufficient, the maintenance personnel can click the "Execute Emergency Leveling" command on the back-end interface. The command is sent to the field gateway via the cellular network, and the gateway reliably sends the "Initiate Emergency Leveling" command to the energy storage device controller and the elevator-side wireless communication module through the Mesh wireless network.

[0056] Furthermore, the platform supports remote video confirmation. If a Wi-Fi camera is installed in the elevator car and the network is normal, maintenance personnel can directly view the real-time footage inside the car to accurately determine if anyone is trapped. Before issuing a command, the system automatically performs a secondary confirmation: checking whether the energy storage SOC is still above 30%, whether the elevator's current status allows for leveling, and whether the Mesh network link quality is good. Execution is only allowed after all conditions are met.

[0057] S30, the energy storage device starts the main discharge circuit to supply power to the elevator equipment according to the emergency command; the elevator equipment executes the preset emergency rescue operation according to the emergency command.

[0058] In this embodiment, upon receiving the instruction, the energy storage device controller immediately closes the main contactor and starts the power conversion system (PCS), outputting standard power to the elevator inverter or emergency leveling interface through its main discharge circuit. The elevator-side wireless communication module forwards the instruction to the elevator's emergency leveling control unit. After receiving the emergency power provided by the energy storage, the elevator control system starts according to the preset emergency leveling procedure: identifying the current position of the car, running at low speed and following the nearest principle to the nearest floor and opening the door; throughout the process, each wireless communication module continuously feeds back key statuses (such as "leveling", "reached floor X", "door open") to the cloud platform through the Mesh network and gateway, realizing full-process visualization. After leveling is completed, the energy storage system automatically shuts down the main discharge circuit and returns to the backup power standby mode, and the background records a complete emergency event handling log.

[0059] During the leveling process in this embodiment, the wireless communication module reports the elevator position and status every 500ms. If an abnormality occurs during leveling (such as a door failing to open or the elevator becoming stuck), the module immediately reports the fault, and the platform automatically triggers a secondary alarm and notifies maintenance personnel to handle the situation on-site.

[0060] Preferably, after leveling is completed, the energy storage system automatically shuts down the main discharge circuit and returns to the backup power standby mode, and the cloud platform records a complete emergency event handling log.

[0061] In this embodiment, the emergency event log includes: event ID, elevator number, power outage time, emergency command issuance time, leveling start time, leveling completion time, energy storage SOC change (starting SOC, ending SOC), leveling running distance, average speed, abnormal situation records, etc. The log is automatically archived and saved for later traceability and analysis.

[0062] By employing the aforementioned emergency strategies, the traditional passive waiting mode of being trapped in an elevator due to a power outage is transformed into an intelligent rescue mode that proactively senses, makes remote decisions, and executes precisely. This can reduce the average time passengers are trapped from 30-60 minutes to less than 5 minutes, greatly improving elevator safety.

[0063] The above are only some embodiments of the present invention and do not limit the patent scope of the present invention. All equivalent structural transformations made under the technical concept of the present invention using the contents of the present invention specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. An elevator energy-saving and safety collaborative system based on a wireless mesh network, characterized in that, include: Energy storage devices, connected to the power grid, are used to recover and release electrical energy; Elevator equipment serves as an energy conversion and consumption unit; Multiple wireless communication modules are provided, the number of which corresponds to the number of energy storage devices and elevator devices. The wireless communication modules are connected to the energy storage devices and elevator devices through communication interfaces. The gateway device connects wirelessly to the multiple wireless communication modules to form a self-organizing mesh network; wherein... The gateway receives and integrates the state of charge and chargeable / dischargeable power of the energy storage device through the Mesh network, and obtains the instantaneous power and running direction of the elevator equipment. Based on the instantaneous power and running direction, it generates control commands through a cooperative control strategy. The gateway also distributes the control commands to the energy storage device through the Mesh network and the corresponding wireless communication module to control the energy storage device to recover electrical energy when the elevator is in power generation mode and release electrical energy when the elevator is in electric mode.

2. The elevator energy-saving and safety collaborative system based on a wireless mesh network according to claim 1, characterized in that, The Mesh network is constructed using the Zigbee or LoRa protocol; when the direct communication link between any wireless communication module and the gateway is interrupted, data packets are relayed through other wireless communication modules to form redundant communication links.

3. The elevator energy-saving and safety collaborative system based on a wireless mesh network according to claim 1, characterized in that, The energy storage device also includes an independent backup power output line, which is directly connected to the battery unit of the energy storage device, and is used to continuously supply power to the gateway and the wireless communication module connected to the energy storage device when the main power is lost.

4. The elevator energy-saving and safety collaborative system based on a wireless mesh network according to claim 3, characterized in that, The wireless communication module connected to the elevator equipment is configured with dual redundant power supply, with the main route drawing power from the elevator control cabinet and the backup route being powered by the backup power output line of the energy storage device.

5. The elevator energy-saving and safety collaborative system based on a wireless mesh network according to claim 1, characterized in that, The collaborative control strategy includes: When the elevator equipment is in power generation mode and the state of charge of the energy storage device is lower than a preset threshold, a control energy recovery command is generated to control the energy storage device to recover energy. When the elevator equipment is in electric operation and the state of charge of the energy storage device is higher than a preset threshold, a control energy release command is generated to control the energy storage device to release energy.

6. The elevator energy-saving and safety collaborative system based on a wireless mesh network according to claim 5, characterized in that, The gateway is also connected to the Internet to upload device operating status data to a cloud platform; In addition, it receives remote instructions or firmware upgrade packages from the cloud platform and distributes OTA firmware upgrade packages from the cloud platform to each wireless communication module in batches through the Mesh network to achieve remote synchronous upgrade of the wireless communication modules.

7. An elevator emergency collaborative control method based on the system described in any one of claims 1 to 6, characterized in that, Includes the following steps: S10, when the main power supply fails, the gateway and at least some wireless communication modules switch to the backup power supply of the energy storage device; The wireless communication module connected to the elevator equipment generates an alarm message after detecting a main power failure. S20, the alarm information is transmitted to the gateway device through the Mesh network, and then uploaded to the cloud platform through the gateway device. The gateway device receives remotely issued emergency commands through the cloud platform. S30, the energy storage device starts the main discharge circuit to supply power to the elevator equipment according to the emergency command; the elevator equipment performs a preset emergency rescue operation according to the emergency command.

8. The elevator emergency collaborative control method according to claim 7, characterized in that, The power failure sensing step is followed by a status confirmation step: The cloud platform or maintenance terminal requests the status information inside the car and / or the remaining power information of the energy storage device through the gateway to assist in rescue decision-making.

9. The elevator emergency collaborative control method according to claim 7, characterized in that, The emergency rescue operation includes: the elevator equipment running at low speed to the nearest floor and opening the door.

10. The elevator emergency collaborative control method according to claim 7, characterized in that, During emergency rescue operations, each wireless communication module continuously transmits the elevator's location and status information to the cloud platform via the Mesh network and gateway.

Images