Domestic sewage discharge monitoring system for roll-on roll-off passenger ship

Abstract

The invention provides a roll-on roll-off passenger ship domestic sewage discharge monitoring system. Comprising a shipborne monitoring subsystem and a cloud supervision platform. The shipborne monitoring subsystem comprises a data acquisition module used for acquiring real-time dynamic data of a ship and real-time discharge data of domestic sewage, and the real-time dynamic data comprises a ship position, a ship speed, a ship course and UTC time; the central processing and judging module is used for receiving and processing the real-time dynamic data and the real-time emission data, automatically judging the current emission behavior based on a preset compliance judgment rule and generating a judgment result; the compliance judgment rule comprises a graded emission rule based on the real-time distance between the ship and the nearest land and the ship navigational speed; according to the invention, by integrating the GPS / Beidou module, the ultrasonic sensor and the acousto-optic early warning device, effective monitoring of domestic sewage discharge time, place, flow and the like is realized, and early warning can be carried out in real time through the acousto-optic early warning device and a page of a system BS architecture.

Description

Technical Field

[0001] This invention relates to the field of marine sewage technology, and more particularly to a monitoring system for the discharge of domestic sewage from roll-on / roll-off passenger ships. Background Technology

[0002] Shipboard sewage primarily originates from wastewater generated during the daily lives of crew members, including feces, urine, washroom drainage, and medical room wastewater. Its composition is complex, containing high concentrations of organic matter, nitrogen and phosphorus nutrients, and pathogenic microorganisms. If not properly treated or discharged into non-designated sea areas, it will lead to eutrophication, triggering ecological disasters such as red tides, and posing a threat to marine life and human health. To strengthen prevention and control, clear limits and regional requirements have been established for the discharge of shipboard sewage.

[0003] Currently, the monitoring of sewage discharge from roll-on / roll-off passenger ships mainly relies on the following methods: First, manual periodic inspections and records by crew members are required, which is inefficient, prone to omissions, and difficult to achieve continuous monitoring throughout the entire process; second, monitoring is conducted using simple flow or level sensors, which can obtain discharge information but lack synchronous recording and integration of multi-dimensional data such as discharge location and time; third, local monitoring systems based on traditional client-server (CS) architectures are used, but these systems lack scalability and cannot support centralized monitoring and data sharing across multiple ships, remotely, and in real time.

[0004] However, the existing technologies mentioned above have significant shortcomings: First, the monitoring methods are relatively limited, failing to synchronously and accurately acquire multi-dimensional information such as emission time, geographical location, and instantaneous flow, making comprehensive supervision difficult; second, the system suffers from poor real-time performance, with data transmission delays hindering timely warnings and interventions when violations occur; third, the warning mechanism is inadequate, typically lacking immediate alerts such as on-site audible and visual alarms; furthermore, the failure to effectively integrate high-precision positioning technologies (such as GPS / BeiDou) makes it difficult to locate and track pollution sources; simultaneously, the traditional system architecture is outdated, hindering remote data aggregation and multi-terminal sharing; finally, overall supervision relies heavily on manpower, resulting in high costs and low efficiency. Therefore, there is an urgent need for an intelligent emission monitoring system capable of multi-parameter fusion, real-time judgment, proactive warning, and remote collaborative supervision. Summary of the Invention

[0005] To address the aforementioned technical problems of existing monitoring methods, such as their reliance on single methods, poor real-time performance, insufficient early warning capabilities, difficulties in data integration, and outdated system architecture, this invention provides a monitoring system for sewage discharge from roll-on / roll-off passenger ships. This invention primarily utilizes an integrated system architecture that combines multi-source data fusion, edge intelligent judgment, and cloud-based collaborative supervision. This enables comprehensive, real-time, and intelligent monitoring and proactive intervention of sewage discharge, effectively improving regulatory efficiency and reducing labor costs.

[0006] The technical means employed in this invention are as follows: A monitoring system for sewage discharge from a roll-on / roll-off passenger ship includes an onboard monitoring subsystem and a cloud-based monitoring platform; The shipborne monitoring subsystem includes: The data acquisition module is used to collect real-time dynamic data of the ship and real-time discharge data of domestic sewage. The real-time dynamic data includes the ship's position, speed, course, and UTC time, and the real-time discharge data includes the discharge rate. The central processing and judgment module is used to receive and process real-time dynamic data and real-time emission data, automatically judge the current emission behavior based on preset compliance judgment rules, and generate judgment results; the compliance judgment rules include graded emission rules based on the real-time distance between the ship and the nearest land and the ship's speed. The on-site early warning and execution module is used to trigger the audible and visual alarm device to provide on-site early warning when the central processing and judgment module determines that the emissions are illegal. The local storage and communication module is used to store real-time dynamic data, real-time emission data and judgment results, and upload the data to the cloud monitoring platform; The cloud-based monitoring platform is used to receive and store data from the ship's onboard monitoring subsystem and provide a web-based visual monitoring interface.

[0007] Furthermore, the data acquisition module includes a ship dynamic sensing unit and a sewage discharge status monitoring unit; The ship dynamic sensing unit includes a GPS / BeiDou dual-mode positioning module, used to obtain the ship's position, speed, heading and UTC time; The sewage discharge status monitoring unit includes an ultrasonic flow sensor, which is used to monitor changes in water flow in the sewage tank discharge pipe and calculate the discharge rate.

[0008] Furthermore, the GPS / BeiDou dual-mode positioning module is installed in the ship's bridge, and the ultrasonic flow sensor is installed in the ship's sewage discharge compartment.

[0009] Furthermore, the central processing and judgment module is deployed on a shipboard server and includes: The data receiving and parsing unit, built using the Netty framework, is used to concurrently receive and parse data from the data acquisition module. The message queue unit is used for asynchronous buffering and distribution of parsed data; The compliance assessment engine is used to execute compliance assessment rules, which include: When the real-time distance between the ship and the nearest land is greater than 12 nautical miles, it is determined whether the ship's speed is greater than or equal to 4 knots and whether the emission rate is less than or equal to the maximum permissible emission rate; if both conditions are met, it is compliant; otherwise, an alarm is triggered. When the real-time distance between the ship and the nearest land is greater than 3 nautical miles and less than or equal to 12 nautical miles, the system checks whether the ship's speed is greater than or equal to 4 knots, whether the domestic sewage has been treated by a treatment device, and whether the discharge rate is less than or equal to the maximum allowable discharge rate. If all conditions are met, the ship is compliant; otherwise, an alarm is triggered. When the real-time distance between a ship and the nearest land is less than or equal to 3 nautical miles, any discharge behavior will be considered as illegal discharge and will immediately trigger an alarm. Discharges made when the ship's speed is less than 4 knots are considered illegal.

[0010] Furthermore, the on-site early warning and execution module includes an audible and visual alarm and a serial-to-network device for controlling the audible and visual alarm; when illegal emissions are detected, the central processing and judgment module sends a control command through the serial-to-network device to drive the audible and visual alarm to start.

[0011] Furthermore, the local storage and communication module includes a local database and a wireless communication unit; The local database is used to persistently store all data; The wireless communication unit establishes a Netty-based TCP long connection with the cloud monitoring platform through a 4G / 5G network or satellite network, and has the functions of local data caching when the network is interrupted and resuming interrupted transmission after network recovery.

[0012] Furthermore, the cloud-based monitoring platform includes: The cloud-based data receiving unit, built using the Netty framework, is used to receive data connections from multiple ships. The cloud data processing and storage unit is used to parse the received data and store it in the cloud database. The Web visualization module is used to dynamically overlay and display ship positions, emission status, trajectories, and alarm information on electronic nautical charts.

[0013] Compared with the prior art, the present invention has the following advantages: 1. The ro-ro passenger ship sewage discharge monitoring system provided by the present invention integrates a multi-source data acquisition module consisting of a shipborne GPS / BeiDou dual-mode positioning module and an ultrasonic flow sensor, thereby achieving synchronous and comprehensive collection and fusion of ship position, speed, heading, time and sewage discharge flow, overcoming the shortcomings of existing technologies such as single monitoring dimensions and fragmented data.

[0014] 2. The ro-ro passenger ship sewage discharge monitoring system provided by the present invention, by deploying a central processing and judgment module based on the Netty framework and message queue on the shipboard side, and embedding a multi-level compliance judgment engine that integrates real-time distance, speed and discharge rate, realizes high-concurrency, low-latency real-time intelligent analysis and automatic judgment of discharge behavior, which significantly improves the real-time performance and accuracy of supervision.

[0015] 3. The ro-ro passenger ship sewage discharge monitoring system provided by the present invention, by setting up a field audible and visual alarm execution module directly controlled by the central processing module, realizes a closed-loop active intervention of monitoring-judgment-execution. It can immediately issue a mandatory warning when a violation is determined, effectively preventing the continuation of the violation and improving the in-process early warning and intervention mechanism.

[0016] 4. The ro-ro passenger ship sewage discharge monitoring system provided by this invention, by adopting a local storage and communication module with breakpoint resume function, and an end-to-cloud consistent long connection communication architecture based on the Netty framework, realizes reliable, continuous, and complete uploading and synchronization of monitoring data in an unstable network environment at sea, ensuring the integrity of the data chain and laying a solid foundation for remote monitoring and post-event traceability.

[0017] 5. The ro-ro passenger ship sewage discharge monitoring system provided by this invention, by constructing a cloud-based monitoring platform that includes a Web visualization module, and by using electronic nautical charts to dynamically overlay and display the dynamics, discharge status and alarm information of multiple ships, realizes remote, centralized and visualized monitoring and management of ship discharge across the entire area, greatly improving monitoring efficiency and reducing manpower and economic costs. Attached Figure Description

[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, the drawings described below are some embodiments of the present invention. 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 system architecture of the present invention. Detailed Implementation

[0020] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0021] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of exemplary embodiments according to the invention. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0023] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of the invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0024] like Figure 1 As shown, the present invention provides a monitoring system for sewage discharge from roll-on / roll-off passenger ships, which mainly includes two parts: a shipborne monitoring subsystem and a cloud-based monitoring platform.

[0025] 1. Shipborne monitoring subsystem; The shipborne monitoring subsystem is deployed on roll-on / roll-off passenger ships and is responsible for the collection, processing, judgment, and execution of on-site data. Its core components are as follows: (1) Data acquisition module; The data acquisition module is used to collect real-time ship dynamic data and wastewater discharge data. Specifically, it includes: Ship Dynamic Sensing Unit: This unit includes a GPS / BeiDou dual-mode positioning module, typically installed in the ship's bridge. This module can acquire the ship's precise geographic coordinates (latitude and longitude), speed over ground (SOG), heading (COG), and UTC time in real time, and output the data via serial port.

[0026] Wastewater Discharge Status Monitoring Unit: This unit includes an ultrasonic flow sensor, which, depending on the ship's structure, can be installed in the sewage tank on either the port or starboard side. This sensor monitors the liquid level changes in the sewage tank in real time, calculates the instantaneous discharge flow rate and discharge rate of the sewage, and outputs the data via an RS485 industrial bus. The raw sensor signal is converted into network data packets via a serial converter (such as a serial server).

[0027] (2) Central processing and judgment module; This module is the control core of the system and is deployed in the ship's engine room or a server in a designated location (hereinafter referred to as the ship's server). It receives and processes data from the data acquisition module and makes intelligent judgments based on built-in rules.

[0028] Data Receiving and Parsing Unit: This unit employs a high-performance server program built on the Netty framework, running on the ship's onboard server. Through the ship's LAN switch, this server simultaneously listens for and receives data connections from serial port conversion devices, efficiently parses data packets, and extracts key parameters such as ship position, speed, heading, UTC time, and emission rate.

[0029] Message Queue Unit: To improve system stability and processing capacity, parsed data can be published to a message queue (such as RabbitMQ) deployed on the same server. This design decouples data reception from subsequent logical processing, effectively handling data surges and avoiding system congestion.

[0030] Compliance Judgment Engine: This engine incorporates an intelligent judgment algorithm. Its core rules are based on the real-time calculated distance between the ship and the "nearest land" (defined according to the electronic chart baseline), as well as the fusion calculation of multiple parameters such as speed and emission rate. Rule A (Offshore Emissions): When the calculated distance is greater than 12 nautical miles, if the speed is greater than or equal to 4 knots and the emission rate is less than or equal to the maximum permissible emission rate, it is considered compliant; otherwise, an alarm is triggered.

[0031] Rule B (Nearshore Discharge): When the calculated distance is >3 nautical miles and ≤12 nautical miles, if the speed is ≥4 knots, the domestic sewage has flowed through the treatment device (which can be determined by additional sensors or status signals) and the discharge rate is ≤ the maximum allowable discharge rate, it is considered compliant; otherwise, an alarm is triggered.

[0032] Rule C (No Discharge Zone): When the calculated distance is ≤3 nautical miles, any discharge behavior will be immediately judged as a violation and an alarm will be triggered.

[0033] Rule D (Low-speed emissions): Regardless of the vessel's location, any emission at a speed of less than 4 knots is considered a violation and will trigger an alarm.

[0034] (3) On-site early warning and execution module; This module is used for immediate intervention when violations are detected. It includes audible and visual alarms installed near the port and starboard waste tanks, as well as corresponding control equipment (such as serial-to-network devices). When the central processing and judgment module determines that a violation has occurred, it immediately generates a control command, which drives the audible and visual alarms to activate via the serial-to-network conversion device, emitting a strong audible and visual signal to create a mandatory warning to on-site operators, thus forming a closed-loop control system of monitoring, judgment, and execution.

[0035] (4) Local storage and communication module; This module is responsible for local data persistence and communication with the cloud.

[0036] Local storage: The shipboard server will write all the raw data, judgment results, alarm events and corresponding timestamps received into a local database (such as MySQL) in real time for storage.

[0037] Communication and Synchronization: The shipboard server transmits data via the ship's 4G / 5G network or satellite network to the cloud monitoring platform through a router, establishing a long-lived TCP connection based on Netty to continuously package and upload data. The system is designed with breakpoint resumption and data compensation mechanisms to ensure data integrity under network fluctuations.

[0038] 2. Cloud-based monitoring platform; The cloud-based monitoring platform is deployed in a server cluster within the shipping company's shore-based computer room, and is responsible for the centralized monitoring of multiple vessels.

[0039] Cloud-based data receiving unit: A high-performance TCP server built using the Netty framework, running on a server in the company's data center, used to receive long connections from all ships in the fleet.

[0040] Cloud data processing and storage unit: After parsing and cleaning the received data, it persists the data to a cloud relational database.

[0041] Web Visualization Module: This module provides shipping company regulators with a browser-based interactive monitoring interface. The front-end is developed using frameworks such as Vue.js, and its core function is to dynamically display vessel information on electronic nautical charts. Regulators can access the platform via browsers on various terminal display devices such as office computers and large screens, enabling remote real-time monitoring and historical data review. Both shipping company management and maritime regulatory departments can conveniently view the data through this method.

[0042] System workflow overview: In actual operation, the system works according to the following process: the data acquisition module continuously acquires data on the ship's position, speed, time, and sewage discharge flow; the central processing and judgment module in the ship's server performs compliance judgment in real time; if a violation is determined, an on-site audible and visual alarm is immediately triggered; at the same time, all data is synchronized in real time to the cloud monitoring platform deployed in the company's computer room via wireless network or satellite link; the shipping company's regulatory personnel can grasp the overall dynamics by accessing the web interface through a browser on the terminal device.

[0043] The system of this invention has been successfully applied on several roll-on / roll-off passenger ships, including the "Yongxingdao" and "Longxingdao" vessels, effectively monitoring hundreds of instances of domestic sewage discharge. The system operates stably, provides accurate early warnings, and significantly improves regulatory efficiency and automation.

[0044] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A roll-on passenger ship sewage discharge monitoring system, characterized by: The system comprises a shipborne monitoring subsystem and a cloud supervision platform; The shipborne monitoring subsystem comprises: a data acquisition module for acquiring real-time dynamic data of the ship and real-time discharge data of the sewage, the real-time dynamic data comprising the ship's position, speed, heading and UTC time, and the real-time discharge data comprising the discharge rate; a central processing and judgment module for receiving and processing the real-time dynamic data and the real-time discharge data, automatically judging the current discharge behavior based on preset compliance judgment rules, and generating a judgment result; the compliance judgment rules comprising a grading discharge rule based on the real-time distance between the ship and the nearest land and the ship's speed; a field early warning and execution module for triggering an audible and light alarm device to give a field early warning when the central processing and judgment module judges that the discharge is in violation of the rules; a local storage and communication module for storing the real-time dynamic data, the real-time discharge data and the judgment result, and uploading the data to the cloud supervision platform; The cloud supervision platform is configured to receive and store data from the shipborne monitoring subsystem of the ship, and provide a Web-based visual monitoring interface.

2. The ro-ro passenger ship sewage discharge monitoring system according to claim 1, characterized in that, The data acquisition module comprises a ship dynamic perception unit and a sewage state monitoring unit; The ship dynamic perception unit comprises a GPS / Beidou dual-mode positioning module for acquiring the ship's position, speed, heading and UTC time; The sewage state monitoring unit comprises an ultrasonic flow sensor for monitoring the water flow change of the sewage tank discharge pipe and calculating the discharge rate.

3. The ro-ro passenger ship sewage discharge monitoring system according to claim 2, characterized in that The GPS / Beidou dual-mode positioning module is installed on the ship's bridge, and the ultrasonic flow sensor is installed in the ship's sewage discharge tank.

4. The ro-ro passenger ship sewage discharge monitoring system according to claim 1, characterized in that, The central processing and judgment module is deployed on a shipborne server and comprises: a data receiving and analyzing unit built with the Netty framework for concurrently receiving and analyzing data from the data acquisition module; a message queue unit for asynchronously buffering and distributing the analyzed data; a compliance judgment engine for executing compliance judgment rules, the compliance judgment rules comprising: when the real-time distance between the ship and the nearest land is greater than 12 nautical miles, judging whether the speed is greater than or equal to 4 knots and the discharge rate is less than or equal to the maximum allowable discharge rate; if both conditions are met, it is considered as compliance, otherwise, an alarm is triggered; when the real-time distance between the ship and the nearest land is greater than 3 nautical miles and less than or equal to 12 nautical miles, judging whether the speed is greater than or equal to 4 knots, the sewage is treated by a treatment device, and the discharge rate is less than or equal to the maximum allowable discharge rate; if all conditions are met, it is considered as compliance, otherwise, an alarm is triggered; when the real-time distance between the ship and the nearest land is less than or equal to 3 nautical miles, any discharge behavior is considered as illegal discharge, and an alarm is triggered immediately; when the ship speed is less than 4 knots, the discharge is considered as illegal discharge.

5. The ro-ro passenger ship sewage discharge monitoring system according to claim 1, characterized in that, The field early warning and execution module comprises an audible and light alarm device and a serial-to-network device for controlling the audible and light alarm device; when it is judged that the discharge is in violation of the rules, the central processing and judgment module sends a control instruction through the serial-to-network device to drive the audible and light alarm device to start.

6. The ro-ro passenger ship sewage discharge monitoring system according to claim 1, characterized in that, The local storage and communication module comprises a local database and a wireless communication unit; The local database is configured to persistently store all data; The wireless communication unit establishes a Netty-based TCP long connection with the cloud supervision platform through a 4G / 5G network or a satellite network, and has the functions of data local caching and breakpoint resume after network interruption.

7. The ro-ro passenger ship sewage discharge monitoring system according to claim 1, characterized in that, The cloud supervision platform comprises: A cloud data receiving unit built with a Netty framework, used for receiving data connections from multiple ships; A cloud data processing and storage unit, used for storing the parsed data into a cloud database; A Web visualization module, used for dynamically superimposing and displaying the ship position, emission state, trajectory and alarm information on an electronic chart.

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