Ship monitoring system based on Beidou satellite

Abstract

The invention discloses a ship monitoring system based on a Beidou satellite, and relates to the technical field of ship safety, and the ship monitoring system comprises a positioning module which is used for receiving a signal sent by the Beidou satellite, processing and analyzing the signal in real time, and outputting an NMEA statement containing the longitude and latitude, the navigational speed and the course of a ship; the processing module is used for receiving the NMEA statements transmitted by the positioning module and processing and analyzing the NMEA statements to obtain the longitude and latitude, the navigational speed and the navigational direction of the ship; the acquisition module is used for acquiring the three-axis angular velocity of the ship; and the alarm module is used for receiving the alarm instruction sent by the processing module and sending out a corresponding sound-light alarm. The system has the advantages that the positioning module is arranged, ship positioning can be automatically returned every five minutes under the condition that no base station exists, signal transmission is conducted through the Beidou satellite, the alarm module and the processing module are arranged, a navigation abnormity alarm can be automatically sent out, and the safety of ship navigation is improved.

Description

Technical Field

[0001] This invention relates to the technical field of ship safety, and specifically to a ship monitoring system based on the BeiDou satellite system. Background Technology

[0002] Ships are large water transport vehicles, mainly used for transporting goods and personnel and performing specific tasks. With technological progress and economic development, domestic and foreign trade has continued to grow, and maritime transportation volume has also shown a large-scale growth trend. Ship traffic is becoming increasingly busy. In order to ensure the safety of ship navigation, ship trajectories are mostly recorded and monitored using tools such as Automatic Identification System (AIS), Beidou positioning, and satellite navigation systems.

[0003] However, existing ship monitoring relies on AIS or maritime satellites, which are expensive and require monthly rentals, making them difficult to implement on small fishing boats; when there are no base stations in the open ocean, AIS becomes ineffective, and shore-based systems cannot track ship positions. Summary of the Invention

[0004] Purpose of the invention: To provide a ship monitoring system based on the BeiDou satellite system to solve the aforementioned problems in the existing technology.

[0005] Technical Solution: A ship monitoring system based on the BeiDou satellite system includes a positioning module, which receives signals transmitted by the BeiDou satellite, processes and analyzes the signals in real time, and outputs an NMEA statement containing the ship's latitude, longitude, speed, and heading; a processing module, which receives the NMEA statement transmitted by the positioning module, processes and analyzes it to obtain the ship's latitude, longitude, speed, and heading; a data acquisition module, which acquires the ship's own three-axis angular velocities; and an alarm module, which receives alarm commands from the processing module and issues corresponding audible and visual alarms.

[0006] Preferably, the positioning module includes a BeiDou radio frequency chip for receiving signals transmitted by BeiDou satellites and calculating ship positioning information, a transceiver unit connected to the BeiDou radio frequency chip for sending and receiving short messages, and a BeiDou antenna for receiving BeiDou signals connected to the BeiDou radio frequency chip and the transceiver unit.

[0007] Preferably, the processing module includes a main control unit for receiving and processing NMEA statements, and a storage unit for caching ship navigation parameters.

[0008] Preferably, the acquisition module includes a three-axis MEMS gyroscope located at the ship's center of gravity, and a filtering circuit connected between the three-axis MEMS gyroscope and the main control unit.

[0009] Preferably, the alarm module includes an audible and visual alarm unit that receives alarm commands from the main control unit, and a status indicator unit for status prompts.

[0010] Preferably, the three-axis MEMS gyroscope is used to measure and output the ship's roll, pitch, and bow angular velocities in real time.

[0011] Preferably, the filtering circuit is used to filter the signal output by the three-axis MEMS gyroscope, and then input the processed signal into the main control unit.

[0012] Preferably, the main control unit sends alarm commands through the Beidou radio frequency chip and transmits the signals to the shore base via the Beidou satellite.

[0013] Preferably, the main control unit automatically sends the ship's location to the shore base every 5 minutes.

[0014] Preferably, the main control unit compares the received real-time navigation parameters of the ship with the historical navigation data stored in the storage unit to determine whether the ship is experiencing abnormal navigation; when the ship's real-time speed exceeds a preset speed threshold, the main control unit determines that the ship is experiencing abnormal navigation; when the rate of change of course exceeds a preset rate of change of course threshold, the main control unit determines that the ship is experiencing abnormal navigation; when the lateral angular velocity exceeds a preset angular velocity threshold, the main control unit determines that the ship is experiencing abnormal navigation; when any abnormal navigation behavior occurs, the main control unit sends an alarm command to the alarm module and the shore-based system.

[0015] The beneficial effects of this invention are as follows: By setting up a positioning module, the system can automatically transmit the ship's position every 5 minutes even without a base station, using BeiDou satellite for signal transmission. This ensures accurate ship position tracking even in remote ocean locations without base stations. Furthermore, by setting up alarm and processing modules, the system can automatically issue navigational anomaly alerts, improving navigational safety. Simultaneously, this system utilizes BeiDou satellite technology, eliminating the need for expensive equipment and monthly rental fees, thus reducing operating costs and enabling widespread application even on small fishing boats. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the present invention. Detailed Implementation

[0017] 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.

[0018] As attached Figure 1As shown in this embodiment, a ship monitoring system based on Beidou satellite includes a positioning module. The positioning module is used to receive signals sent by Beidou satellite, process and analyze the signals in real time, and output NMEA statements containing the ship's latitude, longitude, speed, and heading. The positioning module is used to determine the ship's precise position in real time. It includes a built-in high-precision BeiDou radio frequency chip that can receive, transmit, and analyze navigation signals from the BeiDou satellite system. These signals contain key information such as the ship's latitude, speed, and heading. Through sophisticated algorithms, the positioning module can quickly calculate the ship's current position (latitude and longitude), speed, and heading, and output this information in a standardized NMEA statement format.

[0019] The processing module is used to receive NMEA statements transmitted by the positioning module, and perform processing and analysis to obtain the ship's latitude, longitude, speed, and heading. Once the positioning module transmits an NMEA statement containing information such as the ship's position, speed, and heading to the processing module, the processing module immediately parses this data to obtain fields such as the ship's latitude, longitude, speed, and heading. This information is then displayed visually on a screen for monitoring personnel to view and analyze in real time. Simultaneously, the processing module also has data storage capabilities, recording the ship's historical navigation trajectory for subsequent navigation planning and data analysis.

[0020] The acquisition module is used to acquire the ship's own three-axis angular velocities; The data acquisition module is used to sense the changes in the ship's angular velocity along three axes: roll, pitch, and yaw. This facilitates an understanding of the ship's dynamic stability and sailing attitude. The information is then transmitted in real time to the processing module, which combines it with position data provided by the positioning module to comprehensively analyze the ship's sailing status and navigation risks.

[0021] An alarm module is used to receive alarm commands from the processing module and issue corresponding audible and visual alarms.

[0022] After the processing module processes and analyzes the data transmitted by the positioning and acquisition modules, if the vessel faces navigational risks, such as deviating from the planned route, excessive speed, or encountering severe weather, it sends an alarm command to the alarm module. Upon receiving the command, the alarm module activates the audible and visual alarm function, alerting monitoring personnel and crew with a high-decibel alarm sound and conspicuous alarm lights, allowing them to take timely and appropriate measures to ensure the vessel's navigational safety.

[0023] The positioning module includes a BeiDou radio frequency chip for receiving signals transmitted by BeiDou satellites and calculating ship positioning information, a transceiver unit connected to the BeiDou radio frequency chip for sending and receiving short messages, and a BeiDou antenna for receiving BeiDou signals connected to the BeiDou radio frequency chip and the transceiver unit.

[0024] The BeiDou RF chip receives signals from BeiDou satellites and calculates the ship's longitude, latitude, altitude, and other positioning information using built-in algorithms, achieving precise ship positioning. The transceiver unit is responsible for sending and receiving short messages with the processing module, and the positioning module is connected to the processing module via a serial port. The transceiver unit transmits the ship's positioning information, navigation status, and other data to the main control unit in real time, and can also receive commands and information from the main control unit. The BeiDou antenna is responsible for receiving signals from the BeiDou satellites, ensuring the normal operation of the BeiDou RF chip.

[0025] The processing module includes a main control unit for receiving and processing NMEA statements, and a storage unit for caching ship navigation parameters.

[0026] The main control unit connects to the BeiDou RF chip via a serial port, receiving and processing positioning information, navigation status, and other data transmitted from the chip. It can identify and extract key information from NMEA statements, such as time, date, longitude, latitude, and speed, enabling real-time monitoring and analysis of the ship's navigation status. When an anomaly is detected, such as deviation from the planned route or excessive speed, the main control unit immediately sends a warning command to the alarm module, activating the audible and visual alarm function, and simultaneously sends an alarm message to the monitoring center, allowing for the implementation of measures to ensure the ship's navigation safety.

[0027] The storage unit is used to cache the ship's navigation parameters and historical data for subsequent analysis and retrieval. It can store large amounts of navigation data and supports data import and export functions, facilitating data management and analysis for users. Through the storage unit, users can easily view the ship's historical navigation trajectory, speed changes, and other information.

[0028] The acquisition module includes a three-axis MEMS gyroscope located at the ship's center of gravity, and a filtering circuit connected between the three-axis MEMS gyroscope and the main control unit.

[0029] The three-axis MEMS gyroscope is used to measure and output the ship's roll, pitch, and bow angular velocities in real time.

[0030] The filtering circuit is used to filter the signal output by the three-axis MEMS gyroscope, and then input the processed signal into the main control unit.

[0031] A three-axis MEMS gyroscope can detect changes in the ship's angular velocity in real time, thereby accurately acquiring the ship's attitude information, such as roll, pitch, and bow, for sharp turn monitoring. When the bow rate exceeds a set threshold, the main control unit can determine the collision risk and trigger local collision avoidance actions within one second, thus reducing the collision warning response time from minutes to 10 seconds. The filtering circuit filters the gyroscope output signal to eliminate noise interference and improve signal accuracy and stability. The processed signal is then transmitted to the main control unit for processing and analysis, enabling more accurate monitoring and analysis of the ship's navigation status.

[0032] The alarm module includes an audible and visual alarm unit that receives alarm commands from the main control unit, and a status indicator unit for status prompts.

[0033] When a collision risk or abnormal navigation is detected, the main control unit sends a command to the alarm module to activate the audible and visual alarm unit, emitting a strong sound and flashing lights to alert the crew and prompt them to take appropriate collision avoidance measures. The status indicator unit displays the current operating status of the ship's monitoring system, such as normal operation or alarm triggering. The crew can observe the status indicator unit to understand the system's working status, facilitating system maintenance and troubleshooting.

[0034] The main control unit sends alarm commands through the Beidou radio frequency chip and transmits the signals to the shore base via Beidou satellites.

[0035] The main control unit automatically sends the ship's location to the shore every 5 minutes.

[0036] The main control unit sends a short message to the shore-based system every 5 minutes, containing key information such as the vessel's current position, course, and speed. Upon receiving this information, the shore-based system can perform real-time monitoring and analysis to ensure the vessel's navigational safety. This enables real-time communication of the vessel's current position, speed, course, and any abnormal conditions to the shore-based system in areas without cellular base stations, achieving low-cost remote monitoring.

[0037] The main control unit compares the received real-time navigation parameters of the ship with the historical navigation data stored in the storage unit to determine whether the ship is sailing abnormally.

[0038] When the ship's real-time speed exceeds a preset speed threshold, the main control unit determines that the ship is sailing abnormally. When the rate of change of course exceeds the preset rate of change of course threshold, the main control unit determines that the ship is in abnormal sailing. When the lateral angular velocity exceeds a preset threshold, the main control unit determines that the ship is in abnormal motion. When any abnormal driving behavior occurs, the main control unit sends an alarm command to the alarm module and the shore base.

[0039] The main control unit also compares the ship's real-time position with its historical navigation trajectory to determine if the ship is making any abnormal movements. If the ship deviates from the preset route by more than a certain range, it will also be considered to be making abnormal movements and trigger an alarm mechanism. If the main control unit confirms that the ship is making abnormal movements, it will not only send a command to the alarm module to activate the audible and visual alarm, but also immediately send detailed alarm information to the shore-based system, including the type of abnormality, the time of the abnormality, and the specific location, so that shore-based management personnel can take rapid action.

[0040] Working principle explanation: In operation, the BeiDou satellite positioning device is installed on the ship. The BeiDou radio frequency chip receives position information transmitted by BeiDou satellites in real time, processes and analyzes this information to obtain the ship's latitude, longitude, speed, and heading via NMEA statements, which are then transmitted to the main control unit. The main control unit receives and parses the NMEA statements to obtain the ship's latitude, longitude, heading, and speed; simultaneously, the acquisition module collects the ship's three-axis angular velocities in real time. The main control unit monitors the ship's real-time navigation status based on preset speed, heading change rate, and angular velocity thresholds. The main control unit also stores the ship's preset route information, which, by comparing it with the real-time position, can determine if the ship has deviated from its course. Once any abnormal navigation behavior is detected, the main control unit immediately activates the alarm mechanism, sending a command to the alarm module to trigger an audible and visual alarm to attract the attention of the crew. Simultaneously, the main control unit also transmits detailed alarm information, including the type of anomaly, the time of occurrence, and the specific location, wirelessly to shore-based management personnel, ensuring that management personnel can quickly obtain information about the ship's abnormal status and take appropriate countermeasures.

[0041] The preferred embodiments have been shown and described, but should not be construed as limiting the invention itself. Various changes in form and detail may be made without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. A ship monitoring system based on the BeiDou satellite system, characterized in that: include, The positioning module is used to receive signals sent by Beidou satellites, process and analyze the signals in real time, and output NMEA statements containing the ship's latitude, longitude, speed, and heading. The processing module is used to receive NMEA statements transmitted by the positioning module, and perform processing and analysis to obtain the ship's latitude, longitude, speed, and heading. The acquisition module is used to acquire the ship's own three-axis angular velocities; An alarm module is used to receive alarm commands from the processing module and issue corresponding audible and visual alarms.

2. The ship monitoring system based on BeiDou satellite according to claim 1, characterized in that: The positioning module includes a BeiDou radio frequency chip for receiving signals transmitted by BeiDou satellites and calculating ship positioning information, a transceiver unit connected to the BeiDou radio frequency chip for sending and receiving short messages, and a BeiDou antenna for receiving BeiDou signals connected to the BeiDou radio frequency chip and the transceiver unit.

3. The ship monitoring system based on BeiDou satellite according to claim 1, characterized in that: The processing module includes a main control unit for receiving and processing NMEA statements, and a storage unit for caching ship navigation parameters.

4. The ship monitoring system based on BeiDou satellite according to claim 1, characterized in that: The acquisition module includes a three-axis MEMS gyroscope located at the ship's center of gravity, and a filtering circuit connected between the three-axis MEMS gyroscope and the main control unit.

5. The ship monitoring system based on BeiDou satellite according to claim 4, characterized in that: The alarm module includes an audible and visual alarm unit that receives alarm commands from the main control unit, and a status indicator unit for status prompts.

6. The ship monitoring system based on BeiDou satellite according to claim 5, characterized in that: The three-axis MEMS gyroscope is used to measure and output the ship's roll, pitch, and bow angular velocities in real time.

7. The ship monitoring system based on BeiDou satellite according to claim 6, characterized in that: The filtering circuit is used to filter the signal output by the three-axis MEMS gyroscope, and then input the processed signal into the main control unit.

8. The ship monitoring system based on BeiDou satellite according to claim 7, characterized in that: The main control unit sends alarm commands through the Beidou radio frequency chip and transmits the signals to the shore base via Beidou satellites.

9. The ship monitoring system based on BeiDou satellite according to claim 8, characterized in that: The main control unit automatically sends the ship's location to the shore every 5 minutes.

10. The ship monitoring system based on BeiDou satellite according to claim 9, characterized in that: The main control unit compares the received real-time navigation parameters of the ship with the historical navigation data stored in the storage unit to determine whether the ship is sailing abnormally. When the ship's real-time speed exceeds a preset speed threshold, the main control unit determines that the ship is sailing abnormally. When the rate of change of course exceeds the preset rate of change of course threshold, the main control unit determines that the ship is in abnormal sailing. When the lateral angular velocity exceeds a preset threshold, the main control unit determines that the ship is in abnormal motion. When any abnormal driving behavior occurs, the main control unit sends an alarm command to the alarm module and the shore base.

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