A wireless communication method and system for a port ship unloader and a port ground control center
Patent Information
- Application Number
- CN202311627562.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2023-11-30
- Publication Date
- 2026-11-03
- Estimated Expiration
- 2043-11-30
Smart Images
Figure CN117615344B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of communication technology, and in particular to a wireless communication method and system between a port ship unloader and a port ground control center. Background Technology
[0002] The existing communication between the port ship unloader and the port control center uses the control cable and optical fiber inside the three-in-one cable on the ship unloader to achieve interlocking with the port ground control center. However, after long-term operation and environmental corrosion, the shielding layer inside the three-in-one cable has gradually deteriorated and oxidized, and the shielding effect between the high-voltage power cable and the control cable and optical fiber has deteriorated, resulting in phenomena such as disordered and unstable communication signal transmission.
[0003] However, due to the frequent deployment and retraction of the three-in-one cable for the ship unloader as it moves with the machine, the control cables and optical fibers within the cable experience varying degrees of breakage and core breakage. This leads to intermittent and disconnected control signals. Replacing the three-in-one cable is costly and time-consuming, severely impacting production. With the development of digital networks and information technology, wireless communication technology has matured and is widely used in large-scale industrial control equipment. Therefore, it is necessary to adopt wireless technology to achieve communication between the ship unloader and the port's ground control center system. Summary of the Invention
[0004] In view of the problems existing in the current wireless communication methods and systems between port ship unloaders and port ground control centers, this invention is proposed.
[0005] Therefore, the problem that this invention aims to solve is that the replacement cost is high and the construction period is long due to the damage and breakage of existing hard-wired communication cables.
[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution:
[0007] In a first aspect, embodiments of the present invention provide a wireless communication method between a port unloader and a port ground control center. This method includes: using environmental monitoring sensors to monitor the port environment in real time; enabling data exchange between the control systems of the unloader and the port ground control center through protocol conversion; setting up wireless access points (APs) on both the unloader and the port ground; determining the data exchange status between the unloader and the port ground control center within a certain timeframe based on the port environment status monitored in real time by the environmental monitoring sensors; and employing appropriate node configurations and intelligent routing algorithms based on the data exchange status to optimize network coverage and data transmission paths, enhance signal coverage and communication stability in various areas of the port, and ultimately achieve normal communication between the unloader and the port ground control center system.
[0008] As a preferred embodiment of the wireless communication method between a port ship unloader and a port ground centralized control center according to the present invention, the relevant parameters of the port environment include salt spray concentration, humidity, temperature and vibration intensity.
[0009] As a preferred embodiment of the wireless communication method between a port ship unloader and a port ground centralized control center according to the present invention, the protocol conversion is to install a protocol conversion card on the ship unloader to convert a first communication protocol into a second communication protocol; wherein the first communication protocol is disposed on the ship unloader, and the second communication protocol is disposed on the port ground centralized control center; the protocol conversion card is connected to a wireless communication gateway disposed on the ship unloader through an Ethernet switch.
[0010] As a preferred embodiment of the wireless communication method between a port ship unloader and a port ground centralized control center according to the present invention, the configuration of the wireless APs includes disposing a mobile wireless AP on each ship unloader, and disposing a plurality of fixed wireless APs on the port ground.
[0011] As a preferred embodiment of the wireless communication method between a port ship unloader and a port ground centralized control center according to the present invention, determining the data exchange state between the ship unloader and the port ground centralized control center within a certain period of time according to the port environment state comprises constructing a port environment state model according to the salt spray concentration, humidity, temperature and vibration intensity; defining a preset time period T based on the criticality and tolerance of communication transmission between the ship unloader and the port ground centralized control center, wherein the preset time period T includes T / 2, T, 2T, 3T, and T / 2<T<2T<3T is set; inputting environmental parameters into the port environment state model in real time to obtain the intensity level of the data exchange state;
[0012] The construction process of the port environment state model is as follows: collecting historical data, including salt spray concentration, humidity, temperature, vibration and communication quality indicators; performing data cleaning and preprocessing, specifically including removing outliers, filling missing values, normalization and feature selection; dividing the collected data into a training set, a validation set and a test set; performing feature engineering on each environmental parameter, wherein the feature engineering includes feature scaling and creation of interaction features; initializing a GBM model using the training set, training the model, and applying cross-validation to monitor and evaluate the performance of the model; tuning the hyperparameters of the GBM using a random search method; the random search randomly selects parameter combinations within a preset parameter range to find the optimal model performance; the tuned parameters include learning rate, maximum depth of trees, number of nodes per tree, and sample sampling ratio; evaluating the model performance on the validation set, adjusting the model until the optimal performance is achieved on the validation set; evaluating the final model using the test set to ensure that the model has good generalization ability.
[0013] As a preferred embodiment of the wireless communication method between the port unloader and the port ground control center described in this invention, the signal strength levels of the data exchange state include: maintaining a low signal strength when the salt spray concentration is below Q1, the humidity is below W1, the temperature is between t1 and t2, the vibration is below 3g, and the duration is below T / 2; increasing the signal strength to medium when the salt spray concentration is between Q1 and Q2, the humidity is between W1 and W2, the temperature is between t2 and t3, the vibration is between 3g and 5g, and the duration is T; increasing the signal strength to high when the salt spray concentration exceeds Q2, the humidity exceeds W2, the temperature is below t1 or above t3, the vibration exceeds 5g, and the duration is 2T; taking additional emergency measures and activating the backup communication system when the salt spray concentration continuously exceeds Q3, the humidity continuously exceeds W3, the temperature fluctuates extremely, the vibration continuously exceeds 7g, and the duration is 3T or above; at this time, the signal strength is emergency; when any environmental parameter changes drastically in a short period of time, i.e., less than T / 2, the signal strength is temporarily increased until the environmental parameter stabilizes; at this time, the signal strength is very high.
[0014] As a preferred embodiment of the wireless communication method between the port ship unloader and the port ground control center described in this invention, the following steps are taken: When the signal strength is low, the nodes are configured in standard mode without additional enhancement. At this time, a basic routing algorithm is used, prioritizing data transmission efficiency and energy conservation. When the signal strength is medium, communication redundancy between nodes is increased to ensure the stability of the communication network even when some nodes are affected by the environment. The routing algorithm dynamically adjusts the path according to environmental changes to avoid potential interference areas. When the signal strength is high, more backup nodes are deployed in critical areas, and all nodes are ensured to operate at maximum power to enhance signal coverage. The stability of the intelligent routing algorithm is improved, and efficiency is reduced to ensure reliable data transmission. When the signal strength is in an emergency situation, all backup systems and enhanced nodes are activated, including temporarily deployed mobile nodes or communication equipment on special frequency bands. At this time, the intelligent routing algorithm maximizes the use of all available frequency bands and transmission paths to ensure uninterrupted communication. When the signal strength is very high, the node configuration is quickly adjusted to adapt to sudden environmental conditions. At this time, the intelligent routing algorithm needs to quickly identify and adapt to sudden environmental changes, requiring temporary redirection of data paths to avoid the most severely affected areas.
[0015] Secondly, embodiments of the present invention provide a wireless communication system between a port ship unloader and a port ground control center, comprising: a control layer, an access layer, and a mesh layer; the control layer mainly deploys core switches and wireless LAN controllers, and the control layer is the core of the connection control of the entire wireless network. The core switches need to support redundancy, high efficiency, reliability, etc., and have a high bandwidth of gigabit or higher; the access layer, under the condition of meeting the usage requirements, directly selects ordinary switches or directly adopts ring network industrial switches; in this layer, the fewer the number of workstations in the same network segment, the higher the bandwidth speed provided; the mesh layer consists of base station APs deployed in appropriate locations on site and mobile access terminal APs for the ship unloader.
[0016] Thirdly, embodiments of the present invention provide a computer device, including a memory and a processor, wherein the memory stores a computer program, and the processor executes the computer program to implement any step of the above-described wireless communication method between the port unloader and the port ground control center.
[0017] Fourthly, embodiments of the present invention provide a computer-readable storage medium having a computer program stored thereon, wherein: when the computer program is executed by a processor, it implements any step of the above-described wireless communication method between the port unloader and the port ground control center.
[0018] The beneficial effects of this invention are as follows: 1. In the base station AP forwarding design, the MOTOWing5 wireless controller is used, and the MOTO system can centrally configure multiple devices according to different attributes, making the wireless network easy to deploy and maintain later; 2. After the wireless communication system is installed and put into use, the communication between the ship unloader and the port ground control center control system will be transmitted by a reliable and efficient wireless network, avoiding the use of cables and eliminating the security risks of hard-wired communication. Under the premise of ensuring safe and efficient communication between the ship unloader and the port ground control center control system, the equipment investment and maintenance costs are reduced, and production efficiency is improved. Attached Figure Description
[0019] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein:
[0020] Figure 1 A flowchart illustrating the overall process of wireless communication between the port ship unloader and the port ground control center.
[0021] Figure 2Port site AP location diagram for wireless communication method between port ship unloader and port ground control center.
[0022] Figure 3 A schematic diagram of a wireless network system framework for wireless communication between a port ship unloader and a port ground control center. Detailed Implementation
[0023] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.
[0024] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.
[0025] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that is mutually exclusive with other embodiments.
[0026] This invention is described in detail with reference to the schematic diagrams. When detailing the embodiments of this invention, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not adhering to the usual scale. Furthermore, the schematic diagrams are merely examples and should not be construed as limiting the scope of protection of this invention. In actual fabrication, the three-dimensional spatial dimensions of length, width, and depth should be included.
[0027] Furthermore, in the description of this invention, it should be noted that the terms "upper," "lower," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are used solely for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. In addition, the terms "first," "second," or "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0028] Unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" in this invention should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; similarly, they can refer to mechanical connections, electrical connections, or direct connections, or indirect connections through an intermediate medium, or internal connections between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.
[0029] Example 1
[0030] Reference Figure 1 and Figure 2 This is the first embodiment of the present invention, which provides a wireless communication method between a port ship unloader and a port ground control center, including:
[0031] S1: Use environmental monitoring sensors to monitor the port environment in real time; through protocol conversion, enable data exchange between the control system of the ship unloader and the control system of the port ground control center.
[0032] Specifically, relevant parameters of the port environment include salt spray concentration, humidity, temperature, and vibration intensity. Wireless AP deployment includes mobile wireless APs on each ship unloader and multiple fixed wireless APs on the port ground. Environmental monitoring sensors are installed at key locations. These key locations include ship unloaders, wireless communication gateways, protocol conversion cards, APs, key port areas (container stacking areas, cargo ship berthing areas, etc.), the control center, and highly exposed areas. The reasons for prioritizing these locations are as follows: Ship unloaders: directly exposed to the port environment, installing sensors at key locations on the ship unloaders helps monitor environmental conditions around them (salt spray concentration, humidity, temperature, and vibration intensity). Wireless communication equipment: installing sensors near wireless communication gateways, protocol conversion cards, and wireless access points (APs) allows for real-time monitoring of the environmental conditions surrounding these devices, ensuring they operate optimally. Key port areas: installing environmental monitoring sensors in different key areas of the port (such as container stacking areas and cargo ship berthing areas) helps acquire environmental data for the entire port, enabling the control system to more comprehensively assess the impact of the environment on communication. Central Control Center: Installing environmental monitoring sensors around the center helps monitor environmental changes that may affect the data center or control systems. Highly Exposed Areas: Installing sensors in highly exposed areas of the port (such as the edge of the dock or open cargo storage areas) can monitor potentially more extreme environmental conditions in these areas.
[0033] Further, the protocol conversion is to install a protocol conversion card on the ship unloader to convert the first communication protocol to the second communication protocol; wherein the first communication protocol is disposed on the ship unloader, and the second communication protocol is disposed on the port ground centralized control center; the protocol conversion card is connected to the wireless communication gateway provided on the ship unloader through a switch.
[0034] S2: Install wireless APs on the ship unloader and the port ground respectively.
[0035] A wireless communication host is arranged in the system cabinet of the port centralized control center. When the ship unloader travels, the wireless communication host automatically switches the communication link between the ship unloader and the port centralized control center to the link with the shortest distance and the strongest signal (between the wireless AP on the ship unloader and the on-site ground wireless AP). The arrangement distance between the ground wireless APs does not exceed 60 meters, so as to avoid the problem of communication flicker disconnection between the ship unloader and the port ground centralized control center system during communication link switching.
[0036] S3: Determine the data exchange state between the ship unloader and the port ground centralized control center within a certain period of time according to the port environment state monitored in real time by the environment monitoring sensor.
[0037] Determining the data exchange state between the ship unloader and the port ground centralized control center within a certain period of time according to the port environment state includes constructing a port environment state model according to salt spray concentration, humidity, temperature and vibration intensity; defining a preset time period T based on the criticality and tolerance of communication transmission between the ship unloader and the port ground centralized control center, the preset time period T includes T / 2, T, 2T, 3T, and T / 2<T<2T<3T is set; inputting environmental parameters into the port environment state model in real time to obtain the intensity level of the data exchange state.
[0038] The construction process of the port environment state model is as follows: collect historical data, including salt spray concentration, humidity, temperature, vibration and communication quality indicators; perform data cleaning and preprocessing, specifically including removing outliers, filling missing values, normalization and feature selection; divide the collected data into a training set, a validation set and a test set; perform feature engineering on each environmental parameter, the feature engineering includes feature scaling and creating interaction features; use the training set to initialize the GBM model, train the model, and apply cross-validation to monitor and evaluate the performance of the model; use a random search method to tune the hyperparameters of GBM; the random search randomly selects parameter combinations within a preset parameter range to find the best model performance; the tuned parameters include learning rate, maximum depth of trees, number of nodes per tree, and sample sampling ratio; evaluate the model performance on the validation set. Adjust the model until the best performance is achieved on the validation set; use the test set to evaluate the final model to ensure that the model has good generalization ability.
[0039] Preferably, in this embodiment, the signal strength levels of the data exchange status include: maintaining the signal strength at "low" when the salt spray concentration is below 30 ppm, humidity is below 60%, temperature is between 10°C and 25°C, vibration is below 3g, and duration is below T / 2; increasing the signal strength to "medium" when the salt spray concentration is between 30 ppm and 50 ppm, humidity is between 60% and 75%, temperature is between 5°C and 30°C, vibration is between 3g and 5g, and duration is T; increasing the signal strength to "high" when the salt spray concentration exceeds 50 ppm, humidity exceeds 75%, temperature is below 5°C or above 30°C, vibration exceeds 5g, and duration is 2T; taking additional emergency measures and activating the backup communication system when the salt spray concentration continuously exceeds 70 ppm, humidity continuously exceeds 85%, temperature fluctuates drastically, vibration continuously exceeds 7g, and duration is 3T or more; at this time, the signal strength is "emergency"; when any environmental parameter changes drastically in a short period of time, i.e., less than T / 2, the signal strength is temporarily increased until the environmental parameter stabilizes; at this time, the signal strength is "very high".
[0040] S4: Based on the data exchange status, adopt the corresponding node configuration and intelligent routing algorithm to optimize network coverage and data transmission path, enhance signal coverage and communication stability in various areas of the port, and ultimately achieve normal communication between the unloader and the port ground control center system.
[0041] Furthermore, when the signal strength is low, the nodes are configured in standard mode without additional enhancement. Basic routing algorithms are used, prioritizing data transmission efficiency and energy conservation. When the signal strength is medium, communication redundancy between nodes is increased to ensure network stability even when some nodes are affected by environmental factors. The routing algorithm dynamically adjusts paths based on environmental changes to avoid potential interference areas. When the signal strength is high, more backup nodes are deployed in critical areas, and all nodes are ensured to operate at maximum power to enhance signal coverage. The stability of the intelligent routing algorithm is improved, while efficiency is reduced to ensure reliable data transmission. When the signal strength is emergency, all backup systems and enhanced nodes are activated, including temporarily deployed mobile nodes or communication equipment on special frequency bands. The intelligent routing algorithm maximizes the use of all available frequency bands and transmission paths to ensure uninterrupted communication. When the signal strength is very high, node configuration is quickly adjusted to adapt to sudden environmental changes. The intelligent routing algorithm needs to quickly identify and adapt to sudden environmental changes, requiring temporary redirection of data paths to avoid the most severely affected areas.
[0042] In summary: 1. In the base station AP forwarding design, the MOTOWing5 wireless controller is used. The MOTO system can centrally configure multiple devices according to different attributes, making the wireless network easy to deploy and maintain later; 2. After the wireless communication system is installed and put into use, the communication between the ship unloader and the port ground control center control system will be transmitted by a reliable and efficient wireless network, avoiding the use of cables and eliminating the security risks of hard-wired communication. While ensuring safe and efficient communication between the ship unloader and the port ground control center control system, it reduces equipment investment and maintenance costs and improves production efficiency.
[0043] Example 2
[0044] Reference Figures 2-3 This is a second embodiment of the present invention, which further provides a wireless communication system between a port ship unloader and a port ground control center, including: a control layer, an access layer, and a mesh layer; the control layer mainly deploys core switches and wireless LAN controllers, and the control layer is the core of the connection control of the entire wireless network. The core switches need to support redundancy, high efficiency, reliability, etc., and have a high bandwidth of gigabit or higher; the access layer, under the condition of meeting the usage requirements, directly selects ordinary switches or directly uses ring network industrial switches; in this layer, the fewer the number of workstations in the same network segment, the higher the bandwidth speed provided; the mesh layer consists of base station APs deployed in appropriate locations on site and mobile access terminal APs for the ship unloader.
[0045] This embodiment also provides a computer device applicable to the wireless communication method between a port ship unloader and a port ground control center, including a memory and a processor; the memory is used to store computer-executable instructions, and the processor is used to execute the computer-executable instructions to realize the wireless communication method between the port ship unloader and the port ground control center as proposed in the above embodiment.
[0046] The computer device can be a terminal, comprising a processor, memory, communication interface, display screen, and input devices connected via a system bus. The processor provides computing and control capabilities. The memory includes non-volatile storage media and internal memory. The non-volatile storage media stores the operating system and computer programs. The internal memory provides an environment for the operation of the operating system and computer programs stored in the non-volatile storage media. The communication interface is used for wired or wireless communication with external terminals; wireless communication can be achieved through Wi-Fi, carrier networks, NFC (Near Field Communication), or other technologies. The display screen can be an LCD screen or an e-ink screen. The input devices can be a touch layer covering the display screen, buttons, a trackball, or a touchpad on the computer device's casing, or an external keyboard, touchpad, or mouse.
[0047] This embodiment also provides a storage medium storing a computer program that, when executed by a processor, implements the wireless communication method between a port unloader and a port ground control center as proposed in the above embodiments.
[0048] The storage medium proposed in this embodiment and the data storage method proposed in the above embodiments belong to the same inventive concept. Technical details not described in detail in this embodiment can be found in the above embodiments, and this embodiment has the same beneficial effects as the above embodiments.
[0049] Example 3
[0050] Reference Figures 1-3 This is the third embodiment of the present invention, which provides a wireless communication method between a port ship unloader and a port ground control center. In order to verify the beneficial effects of the present invention, scientific demonstration is carried out through economic benefit calculation and simulation experiments.
[0051] The control system for the three ship unloaders at the raw material port berth of Guangxi Iron and Steel Group Co., Ltd. is ABB's AC800mCPU, while the control system for the port's ground control center is Schneider's Modicon M580CPU. To enable data exchange between these two control systems, a protocol conversion card is installed on the ship unloader to convert its communication protocol to Modbus TCP, and then connects it to the wireless communication gateway installed on the ship unloader through a switch.
[0052] Fixed wireless access points (APs) installed on the port ground are responsible for receiving communication signals and transmitting the data back to the Schneider Electric Modicon M580 CPU used in the port's ground control center via fiber optic cable, thus achieving data exchange. Based on wireless signal coverage requirements, the total travel range of the ship unloader within the port berth is 420 meters. Figure 2 As shown, seven ground-based wireless access points (APs) are installed at suitable locations on the conveyor belt trestle, and one wireless AP is installed on each ship unloader. The seven ground-based APs are connected to the port's centralized control center's control system (Schneider Modicon M580) switch via fiber optic cables. The wireless APs installed on the ship unloaders are connected to the onboard control system (ABB AC800m) via fiber optic cables. This control system has a protocol conversion module that converts the ABB control system's communication protocol to ModBus TCP, ultimately enabling communication with the Schneider control system.
[0053] The network system architecture is divided into a control layer, an access layer, and a mesh layer, adopting a hierarchical design model, such as... Figure 1 As shown in the diagram. The Mesh layer consists of base station APs deployed on the conveyor belt trestle at berth #102 and mobile access APs on the unloader. Wireless mesh networks are also known as "multi-hop" networks.
[0054] This invention enables wireless communication between the ship unloader and the port ground control center, which not only reduces the use of cables and improves production efficiency, but also has a simple structure, reliable function, and convenient installation, thus reducing the cost of equipment use and maintenance.
[0055] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.
Claims
1. A wireless communication method between a port ship unloader and a port ground control center, characterized in that: include, Use environmental monitoring sensors to monitor the port environment in real time; The protocol conversion enables data exchange between the control system of the ship unloader and the control system of the port ground control center. The protocol conversion involves installing a protocol conversion card on the ship unloader to convert a first communication protocol to a second communication protocol. The first communication protocol is set on the ship unloader, and the second communication protocol is set on the port ground control center. The protocol conversion card is connected to a wireless communication gateway installed on the ship unloader via a switch. Wireless access points (APs) were installed on both the ship unloader and the port ground. Based on the port environmental status monitored in real time by the environmental monitoring sensors, the data exchange status between the unloader and the port ground control center within a certain period of time is determined, including: A port environmental condition model is constructed based on salt spray concentration, humidity, temperature, and vibration intensity. Based on the criticality and tolerance of communication transmission between the ship unloader and the port's ground control center, a preset time period T is defined. This preset time period T includes T / 2, T, 2T, and 3T, with T / 2 being set as the maximum. <T<2T<3T; Real-time input of environmental parameters into the port environmental status model yields the intensity level of data exchange status; The process of constructing the port environmental state model is as follows: Collect historical data, including salt spray concentration, humidity, temperature, vibration, and communication quality indicators; Data cleaning and preprocessing are performed, including outlier removal, missing value imputation, normalization, and feature selection. The collected data is divided into training set, validation set, and test set; Feature engineering is performed on various environmental parameters, including feature scaling and creating interactive features; Initialize the GBM model using the training set, train the model, and apply cross-validation to monitor and evaluate the model's performance. The hyperparameters of GBM are tuned using a random search method; the random search randomly selects parameter combinations within a preset parameter range to find the best model performance; the parameters to be tuned include learning rate, maximum tree depth, number of nodes per tree, and sample sampling ratio. Evaluate the model performance on the validation set and adjust the model until it achieves optimal performance on the validation set. The final model is evaluated using a test set to ensure that it has good generalization ability; Based on the data exchange status, corresponding node configurations and intelligent routing algorithms are adopted to optimize network coverage and data transmission paths, enhance signal coverage and communication stability in various areas of the port, and ultimately achieve normal communication between the ship unloader and the port ground control center system.
2. The wireless communication method between the port unloader and the port ground control center as described in claim 1, characterized in that: The relevant parameters of the port environment include salt spray concentration, humidity, temperature, and vibration intensity.
3. The wireless communication method between the port unloader and the port ground control center as described in claim 2, characterized in that: The setup of the wireless APs includes installing mobile wireless APs on each ship unloader and installing multiple fixed wireless APs on the port ground.
4. The wireless communication method between the port unloader and the port ground control center as described in claim 3, characterized in that: The strength levels of the data exchange status include, When the salt spray concentration is below Q1, the humidity is below W1, the temperature is between t1 and t2, the vibration is below 3 g, and the duration is below T / 2, the signal strength is maintained at a low level. When the salt spray concentration is between Q1 and Q2, the humidity is between W1 and W2, the temperature is between t2 and t3, the vibration is between 3 g and 5 g, and the duration is T, the signal strength is increased to medium. When the salt spray concentration exceeds Q2, the humidity exceeds W2, the temperature is lower than t1 or higher than t3, the vibration exceeds 5 g, and the duration is 2T, the signal strength is increased to high. When the salt spray concentration continuously exceeds Q3, the humidity continuously exceeds W3, the temperature fluctuates extremely, the vibration continuously exceeds 7 g, and the duration is 3T or above, additional emergency measures shall be taken and the backup communication system shall be activated; at this time, the signal strength shall be emergency. When any environmental parameter changes drastically within a short period of time, i.e. less than T / 2, the signal strength is temporarily increased until the environmental parameter stabilizes, at which point the signal strength is very high.
5. The wireless communication method between the port unloader and the port ground control center as described in claim 4, characterized in that: When the signal strength is low, the node is configured in standard mode and no additional enhancement is required. At this time, the routing algorithm is used based on data transmission efficiency and energy saving. When the signal strength is medium, communication redundancy between nodes is increased to ensure that the communication network can still be maintained when some nodes are affected by the environment. At this time, the routing algorithm dynamically adjusts the path according to the environmental changes to avoid potential interference areas. When the signal strength is high, deploy more backup nodes in key areas and ensure that all nodes operate at maximum power to enhance signal coverage; Improve the stability of intelligent routing algorithms and reduce efficiency to ensure reliable data transmission; When the signal strength is at an emergency level, all backup systems and reinforcement nodes are activated, including temporarily set-up mobile nodes or communication equipment on special frequency bands; at this time, the intelligent routing algorithm maximizes the use of all available frequency bands and transmission paths to ensure uninterrupted communication. When the signal strength is very high, the node configuration is quickly adjusted to adapt to the sudden environmental conditions. At this time, the intelligent routing algorithm needs to quickly identify and adapt to the sudden environmental changes, and temporarily redirect the data path to avoid the most affected area.
6. A wireless communication system between a port ship unloader and a port ground control center, based on the wireless communication method between a port ship unloader and a port ground control center as described in any one of claims 1 to 5, characterized in that: It includes the control layer, access layer, and mesh layer; The control layer devices are core switches and wireless LAN controllers. The control layer is the core of the connection control of the entire wireless network. The core switches need to support redundancy, high efficiency, and reliability, and have a high bandwidth of gigabit or higher. The access layer can directly select a regular switch or directly use a ring network industrial switch, provided that the usage requirements are met. In this layer, the fewer the number of workstations in the same network segment, the higher the bandwidth speed provided. The Mesh layer consists of base station APs deployed at appropriate locations on site and mobile access terminal APs for the ship unloader.
7. A computer device comprising a memory and a processor, wherein the memory stores a computer program, characterized in that: When the processor executes the computer program, it implements the steps of the wireless communication method between the port unloader and the port ground control center as described in any one of claims 1 to 5.
8. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by the processor, it implements the steps of the wireless communication method between the port unloader and the port ground control center as described in any one of claims 1 to 5.
Citation Information
Patent Citations
Power distribution terminal method and equipment with adaptive communication obstacle avoidance capability
CN113347682A