Ship monitoring system

Abstract

The invention discloses a ship monitoring system which comprises a POE relay device, the POE relay device is connected to a camera through a CAT6 communication network cable, and the power input end of the POE relay device is connected with an EMC filter; an NVR device, wherein the NVR device is connected to the POE relay device through a CAT6 communication network cable; an MO magneto-optical storage device, wherein the MO magneto-optical storage device is connected to the NVR device through a CAT6 communication network cable; the power supply module comprises a ship main power supply and a marine UPS (Uninterrupted Power Supply), and the ship main power supply and the marine UPS are respectively connected with the ATS device; and the monitoring module is connected to the input end of the POE relay equipment and the output end of the power supply module, and is used for monitoring a load signal of the POE relay equipment and forming an alarm signal according to the load signal.

Description

Technical Field

[0001] The present invention relates to the technical field of ship monitoring, and in particular to a ship monitoring system. Background Art

[0002] With the booming development of global trade, the demand for transportation of wheeled cargo such as automobiles has increased dramatically. Ro-ro cargo ships can allow vehicles to get on and off the ship by themselves without the need for complex loading and unloading equipment, which greatly shortens the loading and unloading time.

[0003] Video surveillance is gaining increasing importance as a ship's auxiliary system. For cargo safety, roll-on / roll-off (RoRo) vessels primarily transport large cargo such as vehicles. Video surveillance provides real-time visibility into cargo status, effectively preventing theft and damage. For example, it can promptly detect any vehicle displacement or collision during transport, or any unauthorized personnel approaching cargo. From a navigation safety perspective, it assists crew members in observing key areas of the ship, such as loading ramps and internal passageways. During loading and unloading, it ensures that vehicles and personnel strictly adhere to safety procedures, preventing accidents that could impact the ship's navigation. In ship management, video surveillance systems enable better oversight of crew work status and improve efficiency. Furthermore, in the event of an accident or dispute, surveillance video provides an objective record, facilitating subsequent investigations and the allocation of responsibilities.

[0004] Currently, the video surveillance systems used on ro-ro cargo ships connect each camera to the surveillance recorder via two SYV-75-5-1 coaxial RF cables. These cables are relatively thick and rigid, making them inconvenient in some space-constrained wiring environments. They also have limited bandwidth and are insufficient for high-speed network data transmission (e.g., improving video clarity). Furthermore, when used for video surveillance, the camera power cords must be re-laid. This results in a greater number of cables required for the video surveillance system on ro-ro cargo ships, which also carry cables for other electrical equipment. This results in concentrated equipment paths on ro-ro cargo ships, leading to a large accumulation of cables, especially on the back wall of conference rooms. This also makes on-site construction difficult and aesthetically pleasing.

[0005] At the same time, the existing video surveillance cameras required rewiring power cables, using the ship's power supply, which also powers all other electrical devices on board. When this power supply fails, the video surveillance system cannot operate normally. Frequently, cargo is stolen and unavailable for inspection during periods of power outage, which is extremely inconvenient for ro-ro cargo ships. Another significant risk is the inability to observe key areas of the ship (such as the bridge, bow, and stern) during periods of power outage, making it difficult for crew members to detect surrounding obstacles, other vessels, or floating objects. This significantly increases the likelihood of collisions, especially at night or in low visibility conditions. Summary of the Invention

[0006] In view of the above shortcomings, the present invention provides a ship monitoring system to solve the problems in the above background technology. The specific technical solutions are as follows:

[0007] A ship monitoring system comprising

[0008] A POE relay device, the POE relay device is connected to the camera via a CAT6 communication cable, and the power input end of the POE relay device is connected to an EMC filter;

[0009] NVR device, the NVR device is connected to the POE relay device via a CAT6 communication cable;

[0010] MO magneto-optical storage device, the MO magneto-optical storage device is connected to the NVR device via a CAT6 communication cable;

[0011] A power supply module, wherein the power supply module includes a ship's main power supply and a ship's UPS power supply, wherein the ship's main power supply and the ship's UPS power supply are respectively connected to the ATS device;

[0012] A monitoring module is connected to the input end of the POE relay device and the output end of the power module, and is used to monitor the load signal of the POE relay device and generate an alarm signal according to the load signal.

[0013] Preferably, the monitoring module includes an intelligent PDU device, a managed switch and an SNMP manager. The intelligent PDU device is connected to the managed switch, the managed switch is connected to the SNMP manager, and the POE relay device is connected to the managed switch via a CAT6 communication cable.

[0014] Preferably, the POE relay equipment is arranged in each cabin of the ship.

[0015] Preferably, the length of a single CAT6 communication cable is ≤50 meters.

[0016] Preferably, the ship monitoring system further includes an environmental sensor, which is connected to the monitoring module via a Modbus to network module.

[0017] Preferably, a surge protector is connected to the main power supply of the ship.

[0018] Preferably, the ship's main power supply and the ship's UPS power supply are connected to the ATS device via an isolation transformer.

[0019] Preferably, the POE relay device is connected to an EMC filter.

[0020] Compared with the existing ship monitoring system for ro-ro cargo ships, the present invention has the following beneficial effects:

[0021] 1. POE relay devices support multi-channel camera access (single device can connect 8-24 channels), replacing traditional distributed power adapters, reducing the number of devices, lowering installation costs and maintenance complexity. At the same time, POE relay devices are deployed in each cabin to access the nearest regional camera, shortening cable length, reducing signal attenuation, and adapting to the ship's multi-deck and complex cabin structures.

[0022] 2. Utilizing POE relay equipment and CAT6 communications cables, instead of the traditional dual-cable solution of coaxial RF cable and power cord, a single camera requires only a single CAT6 cable for both data and power transmission, reducing cable count by over 50%. This solves the problem of cable accumulation onboard ships and improves wiring efficiency and aesthetics. Furthermore, CAT6 cables are thinner and more flexible, making them suitable for wiring in confined spaces onboard ships, reducing installation complexity by 30% and making them particularly suitable for complex cabin environments.

[0023] 3. Set up dual power supply seamless switching. The ship's main power supply and marine UPS are connected through the ATS device. The switching time is less than 10ms. When the main power supply fails, the backup power supply is immediately put into use to ensure the continuous operation of core equipment such as POE relay equipment, NVR, MO, etc., avoiding monitoring interruption.

[0024] 4. The intelligent PDU device in the monitoring module can collect the input / output voltage, current and power of the OE relay device in real time, realize remote monitoring through the managed switch and SNMP manager, and issue real-time alarms under abnormal conditions (such as port overload and voltage drop), with a response time of less than 15 seconds. At the same time, the SNMP protocol in the monitoring module supports POE relay device status polling and Trap active alarm. Combined with the port-level monitoring of the intelligent PDU device, it can accurately locate the POE relay device (such as single-port short circuit and poor cable contact), shortening the troubleshooting time by 60%.

[0025] 5. EMC filters and isolation transformers can reduce electromagnetic interference, and the input voltage fluctuation of POE equipment is controlled within ±5%, ensuring data transmission stability.

[0026] 6. Install a surge protector at the main power supply end to suppress transient overvoltage caused by lightning, generator start-up and shutdown, etc. (protection level ≤ 1.5kV), and reduce the equipment failure rate by 40%. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] To more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly describes the drawings required for describing the embodiments. Similar elements or parts are generally identified by similar reference numerals throughout the drawings. Elements or parts in the drawings are not necessarily drawn to scale.

[0028] Figure 1-Figure 3This is a schematic diagram of the existing ship monitoring system;

[0029] Figure 4 Schematic diagram of a ship monitoring system provided in Example 4;

[0030] Figure 5 Schematic diagram of a ship monitoring system provided in Example 4;

[0031] Figure 6 This is a schematic diagram of the ship monitoring system provided by the present invention. DETAILED DESCRIPTION

[0032] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0033] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the present invention.

[0034] In the description of the present invention, "several" means one or more, "many" means more than two, "greater than," "less than," and "exceed" are understood to exclude the number itself, while "above," "below," and "within" are understood to include the number itself. The terms "first," "second," and "third" are used solely for descriptive purposes and to distinguish technical features. They are not to be construed as indicating or implying relative importance, or as implicitly specifying the number or order of the technical features indicated.

[0035] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be internal communication between two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0036] Example 1

[0037] See Figure 6 , a ship monitoring system comprising

[0038] A POE relay device is connected to the camera via a CAT6 communication cable, and the power input end of the POE relay device is connected to an EMC filter.

[0039] NVR device, the NVR device is connected to the POE relay device via a CAT6 communication cable.

[0040] MO magneto-optical storage device, wherein the MO magneto-optical storage device is connected to the NVR device via a CAT6 communication network cable.

[0041] A power supply module includes a ship's main power supply and a ship's UPS power supply, and the ship's main power supply and the ship's UPS power supply are respectively connected to an ATS (automatic dual power switching device) device.

[0042] A monitoring module is connected to the input end of the POE relay device and the output end of the power module, and is used to monitor the load signal of the POE relay device and generate an alarm signal according to the load signal.

[0043] The POE relay device is a network device that extends the distance of POE (Power over Ethernet) power supply. This reduces the wiring required for monitoring systems onboard ships, avoiding wiring consolidation, while also providing power and data transmission for CAT6 communication cables. This reduces wiring requirements for ships while still meeting power and data transmission requirements.

[0044] CAT6 network cables replace the original coaxial radio frequency cables, enabling duplex communication (simultaneous data transmission and reception) for the system. Coaxial radio frequency cables are unidirectional and require additional equipment (such as MoCA adapters) for two-way data communication. CAT6 cables also support gigabit speeds (1Gbps), and when a single cable transmission distance is ≤50 meters, video freeze rates are reduced to less than 0.1%.

[0045] The POE relay device works with the CAT6 communication cable. One POE relay device can meet the signal transmission and power supply needs of multiple high-definition cameras.

[0046] The front-end of the NVR (Network Video Recorder) device, combined with the system's high-definition cameras, supports eight channels of 720P HD video. The NVR also enables centralized management and real-time storage of video information. The NVR is compact and highly flexible.

[0047] Two power supplies are provided: one for the ship's main power supply, which is derived from the ship's main power grid (diesel generator). This power supply is connected to an ATS (automatic dual power switching system) through a surge protector to prevent electromagnetic interference and transient high voltage damage to equipment. The other is a marine UPS. The UPS's "input port" is connected to the main power source for daily charging and float charging of the battery. The UPS's "output port" is connected to the ATS's "backup power port," providing power to the UPS battery in the event of a main power outage.

[0048] In a specific implementation scheme, the main power supply and the UPS output are connected to the ATS device through an isolation transformer (≥2kV insulation level), which can prevent common mode interference and ground loops (the metal hull of a ship is prone to ground potential differences).

[0049] The POE relay device prioritizes the main power source, with the power flow path being from the main power source to the ATS and then to the POE relay device. At this point, the main power source is functioning properly, and the marine UPS is in "charging standby" mode. The UPS battery remains fully charged, and the internal inverter is disabled, indicating energy-saving mode. In this state, the monitoring module monitors the main power source voltage and current in real time, reporting these to the POE relay device's monitoring system via SNMP.

[0050] When the main power supply is abnormal, the ATS device detects a main power outage, undervoltage, or abnormal frequency (such as <45Hz or >55Hz), and the ATS device switches to the ship's UPS for power. At this time, the current path is ship's UPS battery → inverter → ATS → POE relay device. At this time, the monitoring module immediately sends a "power switching event" to the monitoring system via SNMP Trap (Simple Network Management Protocol), triggering the POE relay device monitoring system alarm (sound and light). At this time, since the entire ship's POE relay equipment uses a ship's UPS power supply, the monitoring module can monitor the capacity of the UPS battery in the ship's UPS power supply by monitoring the POE relay device. When the UPS battery capacity falls below the preset threshold (20%), the monitoring module reports "low backup power" via SNMP. At the same time, if the main power is still not restored, the UPS enters a "protective shutdown" to avoid deep discharge and damage to the battery.

[0051] Among them, according to Example 1, if the ship monitoring system is a dual-redundant architecture, dual ATS in parallel + dual UPS hot standby can be configured to avoid circulation through relay interlocking; the POE relay equipment is selected to support dual power input and can be directly connected to the ATS main / backup output to achieve power path redundancy.

[0052] A marine EMC filter is installed at the power input end of the POE relay device to suppress high-frequency interference and stabilize the power input to the POE relay device.

[0053] Example 2

[0054] The difference from Example 1 is that the monitoring module includes an intelligent PDU device, a managed switch and an SNMP manager, the intelligent PDU device is connected to the managed switch, the managed switch is connected to the SNMP manager, and the POE relay device is connected to the managed switch via a CAT6 communication cable.

[0055] The POE relay device is installed in each cabin of the ship. Since cameras are installed in different locations on the ship, cameras in a relatively concentrated area can share the same POE relay device, but the number of cameras at the back end of different POE relay devices is different, and the power they require is also different. In order to facilitate the monitoring of the power and power distribution of each POE relay device, an intelligent PDU device is used. The intelligent PDU device can monitor the power parameters such as current, voltage, power and energy consumption of the output port of the POE relay device in real time, and can also distribute the power required by the POE relay device to ensure the accurate distribution of the power required by each POE relay device.

[0056] The intelligent PDU device monitors the input voltage / current, output voltage / current, and power factor of the POE relay device in real time. The POE relay device is connected to the managed switch via a CAT6 communication cable. The POE relay device supports the SNMP protocol of the SNMP manager (POE relay device monitoring system), allowing the network management system (NMS) to monitor the POE relay device status in real time. The POE relay device has two monitoring options.

[0057] In a specific implementation scheme, the length of a single CAT6 communication cable is ≤50 meters.

[0058] The intelligent PDU device in Example 2 has monitoring capabilities and also serves as a power distribution unit, supporting power supply for multiple POE relay devices. The intelligent PDU device also has built-in voltage / current / power sensors and supports SNMP. If non-POE relay devices such as NVRs and MOs in a ship monitoring system require separate power supply, a standard PDU device can be installed. This standard PDU device is connected to the input terminals of the NVRs, MOs, and other non-POE relay devices and the output terminals of the power module.

[0059] Example 3

[0060] The difference from Example 1 is that the ship monitoring system also includes an environmental sensor, which is connected to the monitoring module via a Modbus to network module. The environmental sensor includes a temperature and humidity sensor (SHT30), which is set to the temperature and humidity of the cabin where the POE relay device is located to prevent high temperature or condensation from affecting the device and avoid malfunction of the POE relay device due to abnormal environment.

[0061] Example 4

[0062] This embodiment 4 provides practical application of the above-mentioned ship monitoring system in a ship, mainly focusing on the connection settings of the POE relay device and the high-definition camera in the ship monitoring system.

[0063] Figure 1-Figure 3 For a schematic diagram of the existing ship monitoring system, see Figure 1-Figure 3 , in the existing ship monitoring system, see Figure 1 The two engine rooms of the ship are each equipped with a high-definition camera, and the left and right gangways are each equipped with a high-definition camera. Each high-definition camera is connected to a CCTV surveillance recorder through two cables. Among them, the high-definition cameras in the two engine rooms and the left and right gangways use one CCTV surveillance recorder.

[0064] See Figure 2 High-definition cameras are installed in the main deck cargo hold, No. 2A cargo hold and lower deck cargo hold of the ship. Each high-definition camera is connected to the CCTV surveillance recorder through two cables. The high-definition cameras in the main deck cargo hold, No. 2A cargo hold and lower deck cargo hold all use one CCTV surveillance recorder.

[0065] See Figure 3 High-definition cameras are installed in the top deck cargo holds of the ship, and some No. 2A cargo holds and the top deck cargo hold share a CCTV surveillance recorder.

[0066] See Figure 1-Figure 3 , each high-definition camera (CCTV1-20) is connected to the CCTV surveillance recorder through a cable line, and the number of cables is large.

[0067] Figure 4-Figure 5 For the ship monitoring system provided in this embodiment 4, refer to Figure 4The two high-definition cameras CCTV1 and CCTV2 in the two engine rooms of the ship, the high-definition cameras CCTV3 and CCTV4 in the lower deck cargo hold, the high-definition cameras CCTV7 and CCTV8 in the main deck cargo hold, the high-definition cameras CCTV11 and CCTV12 in the 2A cargo hold, the high-definition cameras CCTV15 and CCTV16 in the top deck cargo hold, the high-definition camera CCTV19 on the left gangway and the high-definition camera CCTV20 on the right gangway use a POE1 relay device, which is connected to another POE2 relay device.

[0068] See Figure 5 The POE2 relay device is connected to the high-definition cameras CCTV5 and CCTV6 in the lower deck cargo hold, CCTV9 and CCTV10 in the main deck cargo hold, CCTV13 and CCTV14 in the 2A cargo hold, and CCTV17 and CCTV18 in the top deck cargo hold.

[0069] The POE2 relay device is then connected to the NVR device, and the NVR device is connected to the MO device.

[0070] Through actual comparison, the use of POE relay equipment makes the ship's monitoring system no longer need to use more coaxial RF cables. Each high-definition camera (CCTV1-20) on the ship does not need to be connected with two cables separately. The POE relay equipment and CAT6 communication network cable make the high-definition signal transmission of the ship's monitoring system more stable. The CAT6 communication network cable is flexible and easy to install, and can adapt to the complex wiring links on various ships.

[0071] At the same time, the POE1 relay device is connected to the ship's main power supply and marine UPS, which are installed in the ship's engine room. An ATS device and an intelligent PDU device are installed between the POE1 relay device, the ship's main power supply, and the marine UPS. The intelligent PDU device monitors the POE1 relay device, and the ATS device switches between the ship's main power supply and the marine UPS.

[0072] In the above embodiment 4, as an optional implementation scheme, the POE2 relay device can also be connected to the ship's main power supply and the ship UPS separately.

[0073] In summary, the present invention reduces ship monitoring lines by using POE relay equipment and CAT6 communication network cables in the ship monitoring system, while performing real-time monitoring of the POE relay equipment and automatic switching of the backup power supply, ensuring that the ship monitoring system can continue to operate through the UPS when the main power fails.

[0074] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A ship monitoring system, characterized in that: include A POE relay device, the POE relay device is connected to the camera via a CAT6 communication cable, and the power input end of the POE relay device is connected to an EMC filter; NVR device, the NVR device is connected to the POE relay device via a CAT6 communication cable; MO magneto-optical storage device, the MO magneto-optical storage device is connected to the NVR device via a CAT6 communication cable; A power supply module, wherein the power supply module includes a ship's main power supply and a ship's UPS power supply, wherein the ship's main power supply and the ship's UPS power supply are respectively connected to the ATS device; A monitoring module is connected to the input end of the POE relay device and the output end of the power module, and is used to monitor the load signal of the POE relay device and generate an alarm signal according to the load signal.

2. A ship monitoring system according to claim 1, characterized in that: The monitoring module includes an intelligent PDU device, a managed switch and an SNMP manager. The intelligent PDU device is connected to the managed switch, the managed switch is connected to the SNMP manager, and the POE relay device is connected to the managed switch via a CAT6 communication cable.

3. A ship monitoring system according to claim 1, characterized in that: The POE relay equipment is arranged in each cabin of the ship.

4. A ship monitoring system according to claim 1, characterized in that: The length of a single CAT6 communication cable is ≤50 meters.

5. A ship monitoring system according to claim 1, characterized in that: The ship monitoring system further includes an environmental sensor, which is connected to the monitoring module via a Modbus to network module.

6. A ship monitoring system according to claim 1, characterized in that: The main power supply of the ship is connected to a surge protector.

7. A ship monitoring system according to claim 1, characterized in that: The ship's main power supply and the ship's UPS power supply are connected to the ATS device through an isolation transformer.

8. A ship monitoring system according to claim 1, characterized in that: The POE relay device is connected to an EMC filter.

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