Marine container link system

Abstract

The utility model relates to the field of ship electronic detection provides a sea container link system, include: including the casing, PCB main control unit, LoRa communication unit, bluetooth communication unit, RS485 interface, first independent antenna and second independent antenna, the PCB main control unit is integrated in the casing, LoRa communication unit, bluetooth communication unit, RS485 interface all are connected with PCB main control unit electricity, first independent antenna is connected with LoRa communication unit signal, is used for receiving and sending LoRa signal, second independent antenna is connected with bluetooth communication unit signal, is used for receiving and bluetooth signal, the test signal of external sea container link is input to corresponding LoRa communication unit or PCB main control unit through first independent antenna or RS485 interface, and test data is output to external mobile terminal through bluetooth communication unit and second independent antenna, solves the fragmentation problem of existing test equipment.

Description

Technical Field

[0001] This utility model relates to the field of ship electronic inspection, specifically to a maritime container link system. Background Technology

[0002] Modern container ships commonly employ a hybrid monitoring system combining LoRa wireless sensing and an RS485 backbone network. During system deployment, the following key tests are required: Wireless coverage verification: The LoRa signal of each lashing bridge router must meet the communication requirements of the refrigerated containers under hatch cover; Channel stress testing: Verify the network access capacity, service channel throughput, and emergency channel preemption success rate; Wired link testing: Confirm the RS485 bus terminal impedance matching and message transmission delay. Existing monitoring systems and technologies have the following shortcomings: When debugging traditional marine container IoT systems, the IoT system equipment is highly fragmented, requiring multiple independent devices to be carried to complete different link tests. For example, a LoRa field strength meter (such as Anritsu S332D) is used to detect wireless signals, and an RS485 bus analyzer (such as Patos PTS-485) is used to diagnose wired links. The total weight exceeds 8kg, which is not only inconvenient for transportation and operation, but also requires frequent switching between different devices, significantly extending the single-channel testing time (traditionally 40 minutes), making it difficult to meet the needs of efficient debugging on ship decks. Utility Model Content

[0003] The purpose of this invention is to provide a maritime container link system that can solve the above-mentioned problems.

[0004] To achieve the above objectives, this utility model proposes a marine container link system, including a shell, a PCB main control unit, a LoRa communication unit, a Bluetooth communication unit, an RS485 interface, a first independent antenna, and a second independent antenna. The PCB main control unit is integrated inside the housing, and the LoRa communication unit, Bluetooth communication unit, and RS485 interface are all electrically connected to the PCB main control unit. The first independent antenna is signal-connected to the LoRa communication unit and is used to receive and transmit LoRa signals; The second independent antenna is connected to the Bluetooth communication unit for receiving Bluetooth signals; Test signals from the external maritime container link are input to the corresponding LoRa communication unit or PCB main control unit via the first independent antenna or RS485 interface; test data are output to the external mobile terminal via the Bluetooth communication unit and the second independent antenna.

[0005] Further configured, it also includes a power management module, which is mounted on the PCB main control unit and electrically connected to it. External power supply signals are input to the power management module via a Type-C interface or a DC5V interface. The power management module processes the power supply signals and outputs them to the PCB main control unit, the LoRa communication unit, and the Bluetooth communication unit to power each module. Further configured, it also includes a signal analysis unit, which is electrically connected to the PCB main control unit. The CB main control board forwards the test signal to the signal analysis unit. After performing RSSI detection, signal-to-noise ratio calculation and message error rate statistics on the test signal, the signal analysis unit sends the analysis results back to the PCB main control unit.

[0006] Further configured, the LoRa communication unit is equipped with an SX1278 chip. The SX1278 chip is connected to the PCB main control unit via an SPI interface signal. The LoRa signal received by the first independent antenna is transmitted to the SX1278 chip. After processing the signal, the SX1278 chip outputs it to the PCB main control unit via the SPI interface. The control signal generated by the PCB main control unit is input to the SX1278 chip via the SPI interface, and then the SX1278 chip sends it to the external maritime container link via the first independent antenna.

[0007] Further configured, the Bluetooth communication unit is equipped with a GR5513BENDU chip. The GR5513BENDU chip is electrically connected to the PCB main control unit. The test data output by the PCB main control unit is transmitted to the GR5513BENDU chip. The GR5513BENDU chip converts the test data into a Bluetooth signal and outputs it to an external mobile terminal via a second independent antenna. The control commands from the external mobile terminal are input to the GR5513BENDU chip via the second independent antenna. The GR5513BENDU chip processes the control commands and transmits them to the PCB main control unit.

[0008] Further configured, the RS485 interface integrates a TVS transient suppression diode and a resettable fuse, and is electrically connected to the PCB main control unit. The RS485 bus signal of the external marine container link is input through the RS485 interface, and is transmitted to the PCB main control unit in sequence through the TVS transient suppression diode and the resettable fuse. The test command output by the PCB main control unit is output to the RS485 bus of the external marine container link through the resettable fuse, the TVS transient suppression diode and the RS485 interface.

[0009] Further configured, the power management module includes a TP4056X charging management IC, which is electrically connected to a built-in 8600mAh lithium battery. An external charging signal is input to the TP4056X charging management IC via a Type-C interface. The TP4056X charging management IC processes the charging signal and outputs it to the lithium battery for charging. The discharge signal of the lithium battery is processed by the TP4056X charging management IC and output to the PCB main control unit. At the same time, the TP4056X charging management IC transmits the charge / discharge cycle count and battery health data to the PCB main control unit.

[0010] Further configuration includes a mobile terminal APP, which is signal-connected to the Bluetooth communication unit. The Bluetooth communication unit outputs test data to the mobile terminal APP. After the mobile terminal APP generates target route selection instructions and test instructions, it transmits the instructions to the PCB main control unit via the Bluetooth communication unit. The PCB main control unit controls the LoRa communication unit or RS485 interface to perform the corresponding test operation according to the instructions.

[0011] Further configured, the mobile terminal APP has a geofencing function. When the mobile terminal APP detects that the system has entered the preset GPS electronic fence area of ​​the tying bridge, it generates a pre-stored routing configuration parameter signal. This signal is transmitted to the PCB main control unit via the Bluetooth communication unit. The PCB main control unit adjusts the signal receiving and sending parameters of the LoRa communication unit according to the pre-stored routing configuration parameters.

[0012] Further configured, the surface of the housing is provided with an LED working indicator light, which is electrically connected to the PCB main control unit. The PCB main control unit outputs the system's power status, Bluetooth connection status and test status signals to the LED working indicator light, and the LED working indicator light displays the corresponding working status according to the input signal.

[0013] The beneficial effects of one or more of the above technical solutions: This invention integrates a LoRa communication unit (SX1278 chip), a Bluetooth 5.0 communication unit (GR5513BENDU chip), and an RS485 wired interface into a portable device, avoiding frequent switching. The three components are controlled collaboratively by a PCB main control unit. This eliminates the need to carry multiple separate devices, such as traditional LoRa field strength meters and RS485 bus analyzers. A single device can cover the entire "wireless + wired" link test channel, resulting in shorter testing time and a device weight reduced from over 8kg to 2.6kg, thus solving the defects caused by "device fragmentation". Attached Figure Description

[0014] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute a limitation thereof.

[0015] Figure 1 This is a framework diagram of the testing system of this utility model.

[0016] Figure 2 This is a circuit block diagram of the communication module of this utility model.

[0017] Figure 3 This is a schematic diagram of the product structure of this utility model.

[0018] In the diagram: 1. Housing; 2. PCB main control unit; 3. LoRa communication unit; 4. Bluetooth communication unit; 5. RS485 interface; 6. First independent antenna; 61. Second independent antenna; 7. Power management module; 8. Type-C interface / DC5V interface; 9. SX1278 chip; 10. SPI interface; 11. GR5513BENDU chip; 12. TP4056X charging management IC; 13. Lithium battery; 14. Mobile terminal APP; 15. Bluetooth communication unit II; 16. LED working indicator. Detailed Implementation

[0019] The specific implementation of this embodiment will now be described with reference to the accompanying drawings.

[0020] A maritime container link system, referring to Figure 1 , Figure 2 and Figure 3 It includes a housing 1, a PCB main control unit 2, a LoRa communication unit 3, a Bluetooth communication unit 4, an RS485 interface 5, a first independent antenna 6, and a second independent antenna 61. The housing 1 can be made of 6063-T5 aluminum alloy integral casting with hard anodized surface treatment. The interface is equipped with a silicone sealing ring to achieve IP67 protection level. The interior is filled with thermally conductive silicone to ensure an operating temperature range of -30℃ to +85℃. The PCB main control unit 2 is integrated into the housing 1. The LoRa communication unit 3, Bluetooth communication unit 4, and RS485 interface 5 are all electrically connected to the PCB main control unit 2. The first independent antenna 6 is signal-connected to the LoRa communication unit 3 and is used to receive and transmit LoRa signals; The second independent antenna 61 is connected to the Bluetooth communication unit 4 for receiving Bluetooth signals. Test signals from the external maritime container link are input to the corresponding LoRa communication unit 3 or PCB main control unit 2 via the first independent antenna 6 or RS485 interface 5; test data is output to the external mobile terminal via Bluetooth communication unit 4 and second independent antenna 61. This integrated system structure design completely solves the cumbersome operation problem caused by the fragmentation of traditional multi-device systems, integrating the originally scattered LoRa field strength detection, RS485 bus diagnostics, and other functions into a single device. The metal sealed housing 1 not only provides industrial-grade protection (IP67 rating) but also has electromagnetic shielding to avoid high-frequency interference in the deck environment. Through the independent layout of the first independent antenna 6 and the second independent antenna 61, mutual interference between LoRa low-frequency and Bluetooth high-frequency signals is eliminated, and the measured signal reception sensitivity is improved by approximately 40%. The overall weight is controlled at 2.6kg, which is 67% lower than the traditional solution, and the single test time is shortened from 40 minutes to less than 10 minutes, greatly improving the efficiency of ship deck operations.

[0021] Furthermore, it also includes a power management module 7, which is mounted on the PCB main control unit 2 and electrically connected to it. External power supply signals are input to the power management module 7 via the Type-C interface and DC5V interface 8. The power management module 7 outputs the processed power supply signals to the PCB main control unit 2, the LoRa communication unit 3, and the Bluetooth communication unit 4 to power each module. The dual-interface power supply design is compatible with DC5V power supplies commonly used in marine industrial sites and civilian Type-C devices, adapting to different power supply scenarios.

[0022] It also includes a signal analysis unit, which is electrically connected to the PCB main control unit 2. The test signal received by the LoRa communication unit 3 or RS485 interface 5 is transmitted to the PCB main control unit 2. The PCB main control unit 2 forwards the test signal to the signal analysis unit. After performing RSSI detection, signal-to-noise ratio calculation and message error rate statistics on the test signal, the signal analysis unit sends the analysis results back to the PCB main control unit 2. The integrated signal analysis unit replaces the function of traditional external analysis instruments and can analyze the RSSI (Received Signal Strength Indicator) and signal-to-noise ratio (SNR) of the LoRa signal in real time, and perform bit error rate statistics on the RS485 message.

[0023] Furthermore, the LoRa communication unit 3 is equipped with an SX1278 chip 9, which is connected to the PCB main control unit 2 via an SPI interface 10. The LoRa signal received by the first independent antenna 6 is transmitted to the SX1278 chip 9. After processing the signal, the SX1278 chip 9 outputs it to the PCB main control unit 2 via the SPI interface 10. The control signal generated by the PCB main control unit 2 is input to the SX1278 chip 9 via the SPI interface 10, and then transmitted by the SX1278 chip 9 to the external marine container link via the first independent antenna 6. The SX1278 chip 9 fully utilizes its high receiving sensitivity of -148dBm, making it particularly suitable for long-distance communication needs in the metallic environment of ships.

[0024] Furthermore, the Bluetooth communication unit 4 is equipped with a GR5513BENDU chip 11, which is electrically connected to the PCB main control unit 2. The test data output by the PCB main control unit 2 is transmitted to the GR5513BENDU chip 11. The GR5513BENDU chip 11 converts the test data into a Bluetooth signal and outputs it to an external mobile terminal via the second independent antenna 61. The control commands from the external mobile terminal are input to the GR5513BENDU chip 11 via the second independent antenna 61. The GR5513BENDU chip 11 processes the control commands and transmits them to the PCB main control unit 2.

[0025] Furthermore, RS485 interface 5 integrates a TVS transient voltage suppressor diode and a resettable fuse, and is electrically connected to PCB main control unit 2. RS485 interface 5 integrates existing TVS transient voltage suppressor diodes and resettable fuses, and supports automatic matching of 120Ω terminating resistors. The RS485 bus signal of the external marine container link is input through RS485 interface 5, and is transmitted to PCB main control unit 2 in sequence through TVS transient voltage suppressor diode and resettable fuse. The test command output by PCB main control unit 2 is output to the RS485 bus of the external marine container link through resettable fuse, TVS transient voltage suppressor diode and RS485 interface 5. TVS transient voltage suppressor diode can absorb surge impact of ±30kV, and resettable fuse can automatically reset after short circuit fault is eliminated. The dual protection mechanism enables the equipment to withstand voltage transient impacts common in marine electrical systems.

[0026] Furthermore, the power management module 7 includes a TP4056X charging management IC12, which is electrically connected to the built-in 8600mAh lithium battery 13. External charging signals are input to the TP4056X charging management IC12 via the Type-C / DC5V interface 8. The TP4056X charging management IC12 processes the charging signals and outputs them to the lithium battery 13 for charging. The discharge signals of the lithium battery 13 are processed by the TP4056X charging management IC12 and output to the PCB main control unit 2. At the same time, the TP4056X charging management IC12 transmits the charge / discharge cycle count and battery health data to the PCB main control unit 2. The TP4056X chip supports 1.5A fast charging and can fully charge the 8600mAh battery in 3 hours with a charging efficiency of 92%.

[0027] Furthermore, it also includes a mobile terminal APP 14, which is connected to the Bluetooth communication unit 4. The Bluetooth communication unit 4 outputs test data to the mobile terminal APP 14. After the mobile terminal APP 14 generates target routing selection instructions and test instructions, it transmits the instructions to the PCB main control unit 2 via the Bluetooth communication unit 4. The PCB main control unit 2 controls the LoRa communication unit 3 or the RS485 interface 5 to execute the corresponding test operations according to the instructions. The mobile terminal APP 14 provides a graphical operation interface, which simplifies the complex professional test process to point-and-click operations, reducing the technical requirements for operators.

[0028] Furthermore, the mobile terminal APP14 has a geofencing function. When the mobile terminal APP14 detects that the system has entered the preset GPS electronic fence area of ​​the binding bridge, it generates a pre-stored routing configuration parameter signal. This signal is transmitted to the PCB main control unit 2 via the Bluetooth communication unit 4. The PCB main control unit 2 adjusts the signal receiving and sending parameters of the LoRa communication unit 3 according to the pre-stored routing configuration parameters. Based on the intelligent parameter switching function of GPS positioning, when the device is detected to have entered the preset binding bridge area, it automatically loads the communication parameters optimized for that location (such as frequency point, spreading factor, etc.) to make the test environment completely match the actual operating environment.

[0029] Furthermore, the surface of the housing 1 is provided with an LED working indicator light, which is electrically connected to the PCB main control unit 2. The PCB main control unit 2 outputs the system's power status, Bluetooth connection status, and test status signals to the LED working indicator light. The LED working indicator light displays the corresponding working status according to the input signal. The LED indicator system can use a combination of RGB three-color LEDs and different flashing modes to provide intuitive visual feedback in the high-noise environment of the ship deck.

[0030] The following are the results of testing this system on the 14,000 TEU container ship "COSCO Shipping Brazil": (1) Equipment preparation: Turn on the power switch to start the device. The LED displays the battery level and Bluetooth connection status. The mobile APP automatically pops up the binding dialog box and completes the pairing encrypted handshake. (2) Wireless test: Arrive at the No. 4 binding bridge area. The APP loads the 6 pre-stored router IDs in the area based on GPS positioning. Start LoRa scan: Within 3 seconds, the signal strength of router R0032 is detected to be -87dBm (the standard threshold is -95dBm). (3) Select to perform multi-channel test: 1. Network access channel: Simulate 32 refrigerator nodes to access at the same time and record the access success rate of 100%. 2. Service Channel: Continuously send temperature data packets, and the packet loss rate is 0.3% (<1% meets the standard); 3. Emergency Channel: Insert over-limit alarm messages, and the end-to-end delay is <200ms; (4) Wired detection: Connect the device's RS485 interface 5 to the deck backbone network; automatically identify the bus topology and detect the terminal resistor missing alarm; measure the link impedance: 125Ω (standard 120Ω±10%), and determine that a matching resistor needs to be added; (5) Data integration: APP generates a PDF report, including: 1. Test timestamp: 2025-05-26 14:30; 2. GPS coordinates: 31.2356°N, 121.5327°E; 3. Overall evaluation: Wireless network rating A, wired network rating B; Data is synchronized to the cloud management platform, generating maintenance work order #20250526003; Comparative testing shows that compared to traditional methods, this system reduces the weight of testing equipment by 67% (2.6kg vs 8.2kg), shortens single-router detection time by 82% (7 minutes 15 seconds vs 40 minutes), and improves data integrity to 100% (traditional manual recording error rate 12%).

[0031] Although the specific embodiments of the present utility model have been described above in conjunction with the accompanying drawings, this is not intended to limit the scope of protection of the present utility model. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art without creative effort based on the technical solution of the present utility model are still within the scope of protection of the present utility model.

Claims

1. A maritime container link system, characterized in that, It includes a housing, a PCB main control unit, a LoRa communication unit, a Bluetooth communication unit, an RS485 interface, a first independent antenna, and a second independent antenna; The PCB main control unit is integrated inside the housing, and the LoRa communication unit, Bluetooth communication unit, and RS485 interface are all electrically connected to the PCB main control unit. The first independent antenna is signal-connected to the LoRa communication unit and is used to receive and transmit LoRa signals; The second independent antenna is connected to the Bluetooth communication unit for receiving Bluetooth signals; Test signals from the external maritime container link are input to the corresponding LoRa communication unit or PCB main control unit via the first independent antenna or RS485 interface; test data are output to the external mobile terminal via the Bluetooth communication unit and the second independent antenna.

2. The maritime container link system according to claim 1, characterized in that, It also includes a power management module, which is mounted on the PCB main control unit and electrically connected to the PCB main control unit; external power supply signals are input to the power management module via a Type-C interface or a DC5V interface.

3. The maritime container link system according to claim 1, characterized in that, It also includes a signal analysis unit, and the LoRa communication unit is equipped with an SX1278 chip.

4. The maritime container link system according to claim 3, characterized in that, The SX1278 chip is connected to the PCB main control unit via an SPI interface signal.

5. The maritime container link system according to claim 1, characterized in that, The Bluetooth communication unit is equipped with a GR5513BENDU chip, which is electrically connected to the PCB main control unit.

6. The maritime container link system according to claim 1, characterized in that, The RS485 interface integrates a TVS transient suppression diode and a resettable fuse, and is electrically connected to the PCB main control unit.

7. The maritime container link system according to claim 2, characterized in that, The power management module includes a TP4056X charging management IC, which is electrically connected to the built-in lithium battery.

8. The maritime container link system according to claim 1, characterized in that, It also includes a mobile terminal APP, which is connected to the Bluetooth communication unit.

9. The maritime container link system according to claim 8, characterized in that, The mobile terminal APP generates a pre-stored routing configuration parameter signal, which is transmitted to the PCB main control unit via the Bluetooth communication unit.

10. The maritime container link system according to claim 1, characterized in that, The housing surface is provided with an LED working indicator light, which is electrically connected to the PCB main control unit.

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