Ship cabin washing water discharge monitoring method and system based on Beidou short message communication

Abstract

The invention provides a ship cabin washing water discharge monitoring method and system based on Beidou short message communication, and the method comprises the steps: obtaining and analyzing the instantaneous flow rate of ship cabin washing water and a ship dynamic information data flow, and obtaining structured input data; judging whether a discharge event of the ship cabin washing water occurs, and if yes, converting structured data when the event occurs into a monitoring data packet; transmitting the monitoring data packet to a shore-end monitoring platform through a Beidou short message link to obtain a structured emission event record; judging whether emission is performed in the forbidden zone or not, if yes, continuing to judge whether the navigational speed is smaller than the preset minimum navigational speed or not, and obtaining a compliance judgment result; and according to a compliance determination result, alarm pushing is carried out, an alarm evidence chain is generated, and an emission event file is obtained. According to the invention, active discovery, real-time alarm and evidence solidification of the discharge behavior of the cabin washing water of the ship are realized, and the intelligent and precise level of maritime affair supervision is obviously improved.

Description

Technical Field

[0001] This invention relates to the field of ship pollution prevention and control technology, and in particular to a method and system for monitoring ship tank washing water discharge based on Beidou short message communication. Background Technology

[0002] The illegal discharge of tank cleaning water and oily wastewater from ships, especially liquid cargo ships carrying chemicals and oil, is a significant source of marine environmental pollution. Such actions are highly concealed and instantaneous, and the toxic and hazardous substances they contain, once illegally released into the sea, will cause serious and lasting damage to the marine ecosystem. Therefore, effective supervision of discharge activities has become a top priority for maritime work.

[0003] However, existing traditional regulatory models suffer from insurmountable bottlenecks: 1) Severe lag: When violations occur in the open sea, regulatory authorities are almost "unseen," unable to intervene on-site or collect evidence in real time; 2) Extreme complexity: The investigation process heavily relies on the detective-like abilities of law enforcement personnel, requiring comparison of multiple documents such as the "logobook" and "cargo record book," and extensive correlation analysis and calculations to confirm speed violations at the time of discharge. This results in extremely low work efficiency and demands a high level of professional competence from law enforcement personnel, making it difficult to form a standardized, replicable, and large-scale regulatory model. Ultimately, these pain points stem from the lack of a technological means to proactively detect, report in real time, and solidify evidence. Summary of the Invention

[0004] To overcome the shortcomings of existing technologies, the purpose of this invention is to provide a method and system for monitoring ship tank washing water discharge based on Beidou short message communication. This method solves the problems of serious lag and extremely complex evidence collection in traditional regulatory methods, and realizes the proactive detection, real-time alarm and evidence solidification of ship tank washing water discharge behavior, which significantly improves the intelligence and precision of maritime supervision.

[0005] To achieve the above objectives, the present invention provides the following solution: a method for monitoring ship tank washing water discharge based on BeiDou short message communication, comprising: Based on the ship, the instantaneous flow rate of the ship washing tank water and the ship dynamic information data stream are acquired. The edge computing unit is used to collect and parse the instantaneous flow rate of the ship washing tank water and the ship dynamic information data stream using multiple protocols to obtain structured input data. Determine whether a ship's tank cleaning water discharge event has occurred; if so, convert the structured data at the time of the event into a monitoring data packet. The monitoring data packets are transmitted to the shore-based monitoring platform via the BeiDou short message link for data parsing to obtain structured emission event records; Based on the structured emission event, determine whether the emission occurred within the restricted area. If so, continue to determine whether the speed is less than the preset minimum speed to obtain a compliance determination result. Based on the compliance determination results, an alarm is pushed out and an alarm evidence chain is generated to obtain an emission event file.

[0006] Optionally, based on the ship's end, the instantaneous flow rate of the ship's cleaning tank water and the ship's dynamic information data stream are acquired. An edge computing unit is used to perform multi-protocol acquisition and parsing of the instantaneous flow rate of the ship's cleaning tank water and the ship's dynamic information data stream to obtain structured input data, including: An external clamp-on ultrasonic flow meter is installed on the ship's external main discharge pipe. The ultrasonic flow meter is used to measure the fluid velocity in the pipe to obtain the instantaneous flow rate of the ship's tank cleaning water. The instantaneous flow rate of the ship's tank cleaning water is transmitted to the edge computing unit using an industrial serial communication protocol and an RS-485 serial port. The system continuously receives ship AIS information using an AIS receiver or AIS transponder, and outputs standard AIS statements of ship AIS information using the marine electronic equipment serial communication protocol and serial communication interface. UTC time, ship position latitude and longitude, speed to land, heading to land, and MMSI code are parsed from the standard AIS statements to obtain the ship dynamic information data stream. The instantaneous flow rate of the ship's tank cleaning water and the ship's dynamic information data stream are parsed into structured parameters using an edge computing unit to obtain structured input data.

[0007] Optionally, determine whether a ship tank cleaning water discharge event has occurred. If so, convert the structured data at the time of the event into a monitoring data packet, including: Based on the instantaneous flow rate of the ship's tank washing water, a preset upper limit of the flow rate representing the state of no discharge is obtained to get the silent threshold, and a preset flow rate threshold for detecting the start of effective discharge is obtained to get the trigger threshold. Determine whether the instantaneous flow rate of the ship's tank cleaning water changes from less than the silent threshold to greater than the trigger threshold. If so, determine that a discharge event has started and trigger a reporting operation. When a trigger reporting operation is detected, the structured input data at the time of the event is merged into an emission event record. According to the preset BeiDou short message transmission protocol, the emission event record is encapsulated and encoded in binary format, uniformly compressed and structured to obtain a monitoring data packet.

[0008] Optionally, the monitoring data packets are transmitted to the shore-based monitoring platform via a BeiDou short message link for data parsing to obtain structured emission event records, including: The BeiDou-3 short message shipborne terminal is connected to the edge computing unit via a serial port to generate a BeiDou short message link. The monitoring data packet is sent to the ground station via the BeiDou short message link, and then the monitoring data packet is forwarded to the shore monitoring platform via the ground station. The shore-based monitoring platform parses the monitoring data packets to extract the emission event type, occurrence time, emission event latitude and longitude, speed at the time of emission, MMSI code, and emission flow rate data, thus obtaining a structured emission event record.

[0009] Optionally, based on the structured emission event, it is determined whether the emission occurred within a restricted area. If so, the ship's speed is further determined to be less than a preset minimum speed to obtain a compliance determination result, including: The set of prohibited discharge zones defined by geographic polygons is integrated into the shore-side monitoring platform with an electronic fence database. By comparing the latitude and longitude of the discharge event with the electronic fence database, it is determined whether the discharge event is within the prohibited zone. If so, it is determined to be an illegal discharge. The electronic fence database consists of the set of coordinates of the endpoints of each prohibited discharge zone polygon. The shore-based monitoring platform incorporates a MARPOL Convention rule engine. This engine is used to determine whether the speed at which illegal emissions occur is less than a preset minimum speed. If so, the emissions are deemed illegal and a warning is issued. If not, the speed is deemed compliant, and a compliance determination result is obtained.

[0010] This invention also provides a ship tank cleaning water discharge monitoring system based on BeiDou short message communication, comprising: The data acquisition module is used to acquire instantaneous flow rate of ship washing tank water and ship dynamic information data stream based on the ship end. The edge computing unit is used to perform multi-protocol acquisition and parsing of the instantaneous flow rate of ship washing tank water and the ship dynamic information data stream to obtain structured input data. The emission monitoring module is used to determine whether a ship's tank washing water discharge event has occurred. If so, the structured data at the time of the event is converted into a monitoring data packet. The shore-side integrated monitoring module is used to transmit the monitoring data packets to the shore-side monitoring platform via the BeiDou short message link, perform data parsing, and obtain structured emission event records. The compliance determination module is used to determine whether emissions are occurring within the restricted area based on the structured emission event. If so, it continues to determine whether the speed is less than the preset minimum speed to obtain a compliance determination result. The alarm recording module is used to push alarms based on the compliance determination results, generate an alarm evidence chain, and obtain an emission event file.

[0011] This invention discloses the following technical effects by providing a method and system for monitoring ship tank washing water discharge based on BeiDou short message communication: 1. Clear technical path and rigorous logic: Through the analysis of mainstream communication protocols and the complete shipboard processing flow of "event triggering - data fusion - protocol encapsulation", the technical implementation path is specific and complete.

[0012] 2. Reliable data source and rich information dimensions: By integrating AIS data, not only is spatiotemporal information obtained, but the ship's unique identity (MMSI) is also automatically bound, making the evidence chain more complete and reliable.

[0013] 3. High level of intelligence and autonomous operation: The edge computing unit can automatically complete the entire process of multi-protocol parsing, event judgment and data encapsulation without human intervention, realizing true unattended intelligent monitoring.

[0014] 4. Independent and controllable, safe and reliable: The entire technical solution is based on my country's independent Beidou system, and the communication protocol is independent and controllable, which ensures the security of the transmission of regulatory data and the long-term reliability of the link.

[0015] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in 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.

[0017] Figure 1 This is a schematic diagram of the method flow provided in an embodiment of the present invention; Figure 2 This is a schematic diagram of the edge computing process provided in an embodiment of the present invention; Figure 3 This is a schematic diagram of the BeiDou transmission link provided in an embodiment of the present invention; Figure 4 This is a schematic diagram of the compliance determination process provided in an embodiment of the present invention; Figure 5 This is a schematic diagram of the system architecture provided for an embodiment of the present invention. Detailed Implementation

[0018] 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. 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.

[0019] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0020] like Figure 1 As shown, this invention provides a method for monitoring ship tank washing water discharge based on BeiDou short message communication, including: Step 1, as follows Figure 2 As shown, based on the ship end, the instantaneous flow rate of the ship washing tank water and the ship dynamic information data stream are acquired. The edge computing unit is used to perform multi-protocol acquisition and parsing of the instantaneous flow rate of the ship washing tank water and the ship dynamic information data stream to obtain structured input data.

[0021] Step 1 includes: An external clamp-on ultrasonic flow meter is installed on the ship's main discharge pipe. The flow rate of the fluid inside the pipe is measured by the ultrasonic flow meter to obtain the instantaneous flow rate of the ship's tank cleaning water. The instantaneous flow rate of the ship's tank cleaning water is transmitted to the edge computing unit using an industrial serial communication protocol and an RS-485 serial port.

[0022] The system continuously receives ship AIS information using an AIS receiver or AIS transponder, and outputs standard AIS statements of ship AIS information using the marine electronic equipment serial communication protocol and serial communication interface (RS-232 or RS-422). UTC time, ship position latitude and longitude, speed to ground, heading to ground, and MMSI code are parsed from the standard AIS statements to obtain the ship dynamic information data stream.

[0023] The instantaneous flow rate of the ship's tank cleaning water and the ship's dynamic information data stream are parsed into structured parameters using an edge computing unit to obtain structured input data.

[0024] Step 2: Determine whether a ship's tank cleaning water discharge event has occurred. If so, convert the structured data at the time of the event into a monitoring data packet.

[0025] Step 2 includes: Based on the instantaneous flow rate of the ship's tank cleaning water, a preset upper limit for the flow rate representing a state without discharge is used to obtain the silent threshold, with a typical value of 0.1 m. 3 / h, and preset the flow threshold for the start of effective emission detection to obtain the trigger threshold, with a typical value of 0.5 m 3 / h.

[0026] Judge whether the instantaneous flow rate of the ship's tank washing water changes from less than the silent threshold to greater than the trigger threshold. If so, determine that the discharge event has started and trigger the reporting operation.

[0027] When a trigger for reporting an operation is detected, fuse the structured input data at the time of the event into an emission event record. According to the preset Beidou short message transmission protocol, encapsulate, encode, uniformly compress, and structure the emission event record in binary format to obtain a monitoring data packet.

[0028] Specifically, for emission event identification: monitor the parsed instantaneous flow rate value Q(t) of the tank washing water in real time. When there is no data, keep Q(t) < Q0, where Q0 represents the silent threshold of the tank washing water flow rate (the upper limit of the flow rate benchmark before event triggering, set to 0.1 m 3 / h here); monitor the valid data, that is, Q(t) > Q1, (Q1 is the trigger threshold of the tank washing water flow rate, set to 0.5 m 3 / h here. At this time, it is judged that a tank washing water discharge event has occurred, triggering the subsequent process. Refer to the following formula: ; where: E = 1 indicates that an effective tank washing water discharge event has occurred and immediately triggers the reporting operation; E = 0 indicates that there is no effective event.

[0029] Step 3, as Figure 3 shown, transmit the monitoring data packet to the shore monitoring platform through the Beidou short message link for data parsing to obtain a structured emission event record.

[0030] Step 3 includes: Connect the Beidou-3 short message onboard terminal to the edge computing unit through the serial port to generate a Beidou short message link. Send the monitoring data packet to the ground station through the Beidou short message link, and then forward the monitoring data packet to the shore monitoring platform through the ground station.

[0031] Parse the monitoring data packet through the shore monitoring platform, extract the emission event type, occurrence time, emission event longitude and latitude, speed during emission, MMSI code, and emission flow data to obtain a structured emission event record.

[0032] Step 4, as Figure 4 shown, according to the structured emission event, judge whether the discharge is within the restricted area. If so, then continue to judge whether the speed is less than the preset minimum speed to obtain the compliance judgment result.

[0033] Step 4 includes: The set of prohibited discharge zones defined by geographic polygons is integrated into the shore-side monitoring platform with an electronic fence database. By comparing the latitude and longitude of the discharge event with the electronic fence database, it is determined whether the discharge event is within the prohibited zone. If so, it is determined to be an illegal discharge. The electronic fence database consists of the set of coordinates of the endpoints of each prohibited discharge zone polygon.

[0034] Electronic fences include areas within 12 nautical miles of the territorial sea baseline, special marine protected areas, and other areas designated as no-discharge zones by regulatory authorities.

[0035] The shore-based monitoring platform incorporates a MARPOL Convention rule engine. This engine is used to determine whether the speed at which illegal emissions occur is less than a preset minimum speed. If so, the emissions are deemed illegal and a warning is issued. If not, the speed is deemed compliant, and a compliance determination result is obtained.

[0036] Specifically, the MARPOL Convention rule engine: The MARPOL Convention (International Convention for the Prevention of Pollution from Ships) establishes a hierarchical constraint system for tank cleaning water discharge through Annex I (Prevention of Oil Pollution) and Annex II (Prevention of Pollution from Bulk Toxic Liquid Substances). The core principle is based on "differentiated by ship type, different by sea area level, and different by substance toxicity," clearly defining the preconditions for discharge (such as ship position, equipment status, and residual concentration), real-time control requirements during discharge (such as speed and method), and post-discharge recording obligations, forming a full-process compliance framework. Based on regulatory needs, this invention models and implements rules for ship speed compliance (requiring ships to discharge at a speed ≥ 7 knots): the discharge speed Vt is compared with the built-in rule value V0 (V0 = 7 knots). If the speed does not meet the rule value, a discharge violation is determined, and an alarm is issued. Furthermore, the MARPOL Convention rule engine established in this invention supports the expansion of other rules based on requirements.

[0037] Step 5: Based on the compliance determination result, an alarm is pushed out, and an alarm evidence chain is generated to obtain an emission event file. The emission event file includes the original monitoring data packet reported by Beidou short message, the parsed flow value, time, location information, speed, MMSI, and the rule judgment process and result.

[0038] This invention also provides a ship tank cleaning water discharge monitoring system based on BeiDou short message communication, comprising: The data acquisition module is used to acquire instantaneous flow rate of ship washing tank water and ship dynamic information data stream based on the ship end. The edge computing unit is used to perform multi-protocol acquisition and parsing of the instantaneous flow rate of ship washing tank water and the ship dynamic information data stream to obtain structured input data. The emission monitoring module is used to determine whether a ship's tank washing water discharge event has occurred. If so, the structured data at the time of the event is converted into a monitoring data packet. The shore-side integrated monitoring module is used to transmit the monitoring data packets to the shore-side monitoring platform via the BeiDou short message link, perform data parsing, and obtain structured emission event records. The compliance determination module is used to determine whether emissions are occurring within the restricted area based on the structured emission event. If so, it continues to determine whether the speed is less than the preset minimum speed to obtain a compliance determination result. The alarm recording module is used to push alarms based on the compliance determination results, generate an alarm evidence chain, and obtain an emission event file.

[0039] Therefore, this invention provides a method and system for monitoring ship tank washing water discharge based on Beidou short message communication, which solves the problems of serious lag and extremely complex evidence collection in traditional regulatory methods. It realizes the proactive discovery, real-time alarm and evidence solidification of ship tank washing water discharge behavior, and significantly improves the intelligence and precision of maritime supervision.

[0040] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0041] This document uses specific examples to illustrate the principles and implementation methods of the present invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of the present invention. Furthermore, those skilled in the art will recognize that, based on the ideas of the present invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. A method for monitoring ship tank washing water discharge based on BeiDou short message communication, characterized in that, include: Based on the ship, the instantaneous flow rate of the ship washing tank water and the ship dynamic information data stream are acquired. The edge computing unit is used to collect and parse the instantaneous flow rate of the ship washing tank water and the ship dynamic information data stream using multiple protocols to obtain structured input data. Determine whether a ship's tank cleaning water discharge event has occurred; if so, convert the structured data at the time of the event into a monitoring data packet. The monitoring data packets are transmitted to the shore-based monitoring platform via the BeiDou short message link for data parsing to obtain structured emission event records; Based on the structured emission event, determine whether the emission occurred within the restricted area. If so, continue to determine whether the speed is less than the preset minimum speed to obtain a compliance determination result. Based on the compliance determination results, an alarm is pushed out and an alarm evidence chain is generated to obtain an emission event file.

2. The method for monitoring ship tank washing water discharge based on Beidou short message communication according to claim 1, characterized in that, Based on the ship's end, instantaneous flow rate of tank cleaning water and ship dynamic information data streams are acquired. Edge computing units are used to perform multi-protocol acquisition and parsing of the instantaneous flow rate of tank cleaning water and the ship dynamic information data streams to obtain structured input data, including: An external clamp-on ultrasonic flow meter is installed on the ship's external main discharge pipe. The ultrasonic flow meter is used to measure the fluid velocity in the pipe to obtain the instantaneous flow rate of the ship's tank cleaning water. The instantaneous flow rate of the ship's tank cleaning water is transmitted to the edge computing unit using an industrial serial communication protocol and an RS-485 serial port. The system continuously receives ship AIS information using an AIS receiver or AIS transponder, and outputs standard AIS statements of ship AIS information using the marine electronic equipment serial communication protocol and serial communication interface. UTC time, ship position latitude and longitude, speed to land, heading to land, and MMSI code are parsed from the standard AIS statements to obtain the ship dynamic information data stream. The instantaneous flow rate of the ship's tank cleaning water and the ship's dynamic information data stream are parsed into structured parameters using an edge computing unit to obtain structured input data.

3. The method for monitoring ship tank washing water discharge based on Beidou short message communication according to claim 2, characterized in that, Determine whether a ship's tank cleaning water discharge event has occurred. If so, convert the structured data at the time of the event into a monitoring data packet, including: Based on the instantaneous flow rate of the ship's tank washing water, a preset upper limit of the flow rate representing the state of no discharge is obtained to get the silent threshold, and a preset flow rate threshold for detecting the start of effective discharge is obtained to get the trigger threshold. Determine whether the instantaneous flow rate of the ship's tank cleaning water changes from less than the silent threshold to greater than the trigger threshold. If so, determine that a discharge event has started and trigger a reporting operation. When a trigger reporting operation is detected, the structured input data at the time of the event is merged into an emission event record. According to the preset BeiDou short message transmission protocol, the emission event record is encapsulated and encoded in binary format, uniformly compressed and structured to obtain a monitoring data packet.

4. The method for monitoring ship tank washing water discharge based on Beidou short message communication according to claim 3, characterized in that, The monitoring data packets are transmitted to the shore-based monitoring platform via the BeiDou short message link for data parsing, resulting in structured emission event records, including: The BeiDou-3 short message shipborne terminal is connected to the edge computing unit via a serial port to generate a BeiDou short message link. The monitoring data packet is sent to the ground station via the BeiDou short message link, and then the monitoring data packet is forwarded to the shore monitoring platform via the ground station. The shore-based monitoring platform parses the monitoring data packets to extract the emission event type, occurrence time, emission event latitude and longitude, speed at the time of emission, MMSI code, and emission flow rate data, thus obtaining a structured emission event record.

5. A method for monitoring ship tank washing water discharge based on BeiDou short message communication according to claim 4, characterized in that, Based on the structured emission event, determine whether the emission occurred within a restricted area. If so, further determine whether the speed is less than a preset minimum speed to obtain a compliance determination result, including: The set of prohibited discharge zones defined by geographic polygons is integrated into the shore-side monitoring platform with an electronic fence database. By comparing the latitude and longitude of the discharge event with the electronic fence database, it is determined whether the discharge event is within the prohibited zone. If so, it is determined to be an illegal discharge. The electronic fence database consists of the set of coordinates of the endpoints of each prohibited discharge zone polygon. The shore-based monitoring platform incorporates a MARPOL Convention rule engine. This engine is used to determine whether the speed at which illegal emissions occur is less than a preset minimum speed. If so, the emissions are deemed illegal and a warning is issued. If not, the speed is deemed compliant, and a compliance determination result is obtained.

6. A ship tank cleaning water discharge monitoring system based on BeiDou short message communication, characterized in that, include: The data acquisition module is used to acquire instantaneous flow rate of ship washing tank water and ship dynamic information data stream based on the ship end. The edge computing unit is used to perform multi-protocol acquisition and parsing of the instantaneous flow rate of ship washing tank water and the ship dynamic information data stream to obtain structured input data. The emission monitoring module is used to determine whether a ship's tank washing water discharge event has occurred. If so, the structured data at the time of the event is converted into a monitoring data packet. The shore-side integrated monitoring module is used to transmit the monitoring data packets to the shore-side monitoring platform via the BeiDou short message link, perform data parsing, and obtain structured emission event records. The compliance determination module is used to determine whether emissions are occurring within the restricted area based on the structured emission event. If so, it continues to determine whether the speed is less than the preset minimum speed to obtain a compliance determination result. The alarm recording module is used to push alarms based on the compliance determination results, generate an alarm evidence chain, and obtain an emission event file.

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