A roll-on / roll-off ship cargo fire detection and alarm system
By laying temperature-sensing optical fibers and distributed optical fiber temperature measurement hosts on roll-on/roll-off ships, and combining the information with the upper computer processing, early detection and accurate location of fire hazards were achieved, solving the problem of accuracy in fire detection on roll-on/roll-off ships and reducing fire losses.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- SHANGHAI RONGDE ENG EQUIP
- Filing Date
- 2026-02-11
- Publication Date
- 2026-06-12
AI Technical Summary
Existing fire detection systems for roll-on/roll-off ships cannot accurately detect the location of a fire, making it difficult to detect and handle fires in a timely manner, and thus failing to meet the actual needs of roll-on/roll-off ships.
A distributed fiber optic temperature measurement system is adopted, including temperature-sensing optical fibers, a distributed fiber optic temperature measurement host, and a host computer. The temperature-sensing optical fibers laid on the deck monitor temperature anomalies in real time, and the host computer processes the information and issues alarm signals to achieve early detection of fire hazards.
It enables early detection of fire hazards in roll-on/roll-off cargo, with high positioning accuracy and rapid response. It is suitable for confined and complex environments, meets explosion-proof requirements, and reduces fire losses.
Smart Images
Figure CN122200877A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of marine technology, specifically to a fire detection and alarm system for cargo on roll-on / roll-off ships. Background Technology
[0002] The two most common disasters on roll-on / roll-off (Ro-Ro) ships are collisions and fires. Once a fire breaks out, it is often difficult to promptly ascertain the source of the fire, its location, and its intensity, easily allowing the fire to escalate and spread. Furthermore, the enclosed nature, narrow passageways, complex internal structure, and difficulty in evacuation of Ro-Ro ships make firefighting challenging and can result in severe property damage. Therefore, preventing and mitigating fire losses during Ro-Ro transport, and protecting the personal safety and property of crew members, ship owners, and cargo owners are all of paramount importance. Temperature increases often precede fires; therefore, real-time and accurate temperature monitoring is crucial for early fire detection. Real-time temperature monitoring can detect abnormalities and issue alarms and location information, allowing for timely and accurate investigation and resolution of fire hazards.
[0003] Currently, fixed fire detection devices are used on roll-on / roll-off ships, such as smoke detectors, flame detectors, and combustible gas detectors.
[0004] Due to the enclosed space, narrow passageways, and complex internal structure of roll-on / roll-off (Ro-Ro) ships, commonly used fire alarm systems are generally unable to accurately detect the location of a fire, enabling early detection and timely assessment of the burning material, ignition point, and fire intensity, thus failing to meet practical needs. Smoke extraction fire alarm systems continuously draw gas from the cabin using fans, determining the presence of a fire based on the smoke concentration. While suitable for detecting fires in a specific area within a confined space, they cannot pinpoint the exact location of the fire. Flame detector alarm systems detect the intensity of ultraviolet or infrared radiation from a burning flame. However, because vehicles are densely parked on Ro-Ro ships, the fire location can be obscured, hindering timely detection. Combustible gas detectors detect excessive concentrations of combustible gas within a protected area, eliminating this fire hazard to prevent fires. However, since not all cargo carried on Ro-Ro ships contains, produces, or leaks combustible gases, these systems are unsuitable for practical applications. Summary of the Invention
[0005] The purpose of this invention is to provide a fire detection and alarm system for cargo on roll-on / roll-off ships to solve the problems mentioned in the background art.
[0006] To achieve the above objectives, the present invention provides the following technical solution: a fire detection and alarm system for cargo on a roll-on / roll-off ship, comprising a deck, a temperature-sensing optical fiber, an extended alarm module, a distributed optical fiber temperature measurement host, and a host computer. Multiple parking spaces are provided on the deck, and the temperature-sensing optical fiber is laid on the deck and the parking spaces. The distributed optical fiber temperature measurement host includes a main control module, a laser source drive module, a Raman wave division multiplexer, a photoelectric detection module, a high-speed data acquisition module, and a communication module. The Raman wave division multiplexer is electrically connected to the temperature-sensing optical fiber, the laser source drive module, and the photoelectric detection module, respectively. The photoelectric detection module is electrically connected to the high-speed data acquisition module, and the high-speed data acquisition module is electrically connected to the main control module. The main control module is electrically connected to the laser source drive module and the communication module, respectively. The host computer includes an industrial control computer and an alarm output module. The communication module is electrically connected to the industrial control computer, the industrial control computer is electrically connected to the alarm output module, and the alarm output module is electrically connected to the extended alarm module. The system's temperature anomaly alarms are divided into pre-alarm, main alarm, sensor fault alarm, and system fault alarm. The alarm data determination method can be either constant temperature alarm or differential temperature alarm. The distributed fiber optic temperature measurement host is mainly used to obtain the temperature information sensed by the temperature sensing fiber and send the collected information to the industrial control computer of the host computer through the communication line. Then, the alarm output module outputs the alarm signal and sends the alarm signal to the extended alarm module. The alarm information is displayed and an audible and visual alarm signal is issued.
[0007] Preferably, the distributed fiber optic temperature measurement host and the host computer are located in the central control room of the roll-on / roll-off ship, and the extended alarm module is located in the bridge and duty room of the roll-on / roll-off ship, so that the staff can understand the situation more quickly.
[0008] Preferably, the deck is provided with a cable tray for laying temperature-sensing optical fibers, which serves to hide and protect the temperature-sensing optical fibers and prevent them from being damaged by external forces.
[0009] Preferably, the temperature-sensing optical fiber laid in the parking space is arranged in multiple turns in an elliptical shape to improve the sensitivity of the temperature-sensing optical fiber.
[0010] Preferably, the host computer also includes a temperature measurement system client and is connected to the industrial control computer. The host computer processes the information sent by the distributed fiber optic temperature measurement host through the temperature measurement system client software, and displays the real-time and historical temperatures in the form of a three-dimensional heat map, a zone list, and a temperature curve in combination with the distribution map of the vehicles loaded on the deck of the roll-on / roll-off ship. Alarm information is also displayed in a list and alarm records are stored for query.
[0011] Preferably, the parking spaces are arranged in a rectangular array on the deck to facilitate the laying of temperature-sensing optical fibers.
[0012] Compared with the prior art, the beneficial effects of the present invention are: This invention is used for temperature measurement of vehicles and cargo loaded on the deck of roll-on / roll-off (Ro-Ro) ships, thereby enabling early detection and timely handling of fire hazards to avoid losses. During cargo transportation on a Ro-Ro ship, if a vehicle experiences an abnormal temperature rise within a short period, the temperature measurement system will issue an alarm and display the specific location of the alarm point. Because the temperature sensing device of the distributed fiber optic temperature measurement system is an optical fiber with no internal electrical signals, it meets the explosion-proof requirements for transporting hazardous materials. Furthermore, the distributed temperature-sensing optical fiber has a single-channel detection distance of up to 10 km, a positioning accuracy of less than 1 m, and a sampling time of less than 5 seconds. Through the combination of multiple channels and multiple hosts, it can monitor tens of thousands of detection points. It features a simple structure, fast response time, convenient installation, and high cost-effectiveness, making it suitable for applications with numerous monitoring points, such as Ro-Ro ships. It can also be used in confined spaces and complex internal structures, demonstrating strong versatility. Attached Figure Description
[0013] Figure 1 This is a schematic diagram of the deck structure of the present invention; Figure 2 This is a schematic diagram of the system structure of the present invention.
[0014] In the diagram: 1. Distributed fiber optic temperature measurement host; 2. Host computer; 3. Extended alarm module; 4. Temperature sensing fiber optic cable; 5. Deck; 6. Parking space; 101. Main control module; 102. Laser source drive module; 103. Raman wave division multiplexer; 104. Photoelectric detection module; 105. High-speed data acquisition module; 106. Communication module; 201. Industrial control computer; 202. Alarm output module. Detailed Implementation
[0015] 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.
[0016] In the description of this invention, it should be noted that the terms "vertical," "upper," "lower," "horizontal," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.
[0017] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.
[0018] Please see Figure 1-2 This invention provides a technical solution: a fire detection and alarm system for cargo on a roll-on / roll-off ship, comprising a deck 5, a heat-sensing optical fiber 4, an extended alarm module 3, a distributed optical fiber temperature measurement host 1, and a host computer 2. Multiple parking spaces 6 are provided on the deck 5. The heat-sensing optical fiber 4 is laid on the deck 5 and the parking spaces 6. The distributed optical fiber temperature measurement host 1 includes a main control module 101, a laser source driving module 102, a Raman wave division multiplexer 103, a photoelectric detection module 104, a high-speed data acquisition module 105, and a communication module 106. The Raman wave division multiplexer 103 is connected to the heat-sensing optical fiber 4, the laser source driving module 102, and the photoelectric detection module 106, respectively. The components 104 are electrically connected. The photoelectric detection module 104 is electrically connected to the high-speed data acquisition module 105. The high-speed data acquisition module 105 is electrically connected to the main control module 101. The main control module 101 is electrically connected to the laser source drive module 102 and the communication module 106, respectively. The host computer 2 includes an industrial control computer 201 and an alarm output module 202. The communication module 106 is electrically connected to the industrial control computer 201. The industrial control computer 201 is electrically connected to the alarm output module 202. The alarm output module 202 is electrically connected to the extended alarm module 3.
[0019] The system's temperature anomaly alarms are divided into pre-alarm, main alarm, sensor fault alarm, and system fault alarm. The alarm data determination method can be either constant temperature alarm or differential temperature alarm. The distributed fiber optic temperature measurement host 1 is mainly used to obtain the temperature information sensed by the temperature sensing fiber 4, and send the collected information to the industrial control computer 201 of the host computer 2 via the communication line. Then, the alarm output module 202 outputs the alarm signal and sends the alarm signal to the extended alarm module 3. The alarm information is displayed and an audible and visual alarm signal is issued.
[0020] Furthermore, the distributed fiber optic temperature measurement host 1 and the host computer 2 are installed in the central control room of the roll-on / roll-off ship, and the extended alarm module 3 is installed in the bridge and duty room of the roll-on / roll-off ship, so that the staff can understand the situation more quickly.
[0021] Furthermore, the deck 5 is provided with a cable tray for laying the temperature-sensing optical fiber 4, which serves to hide and protect the temperature-sensing optical fiber 4 and prevent it from being damaged by external forces.
[0022] Furthermore, the temperature-sensing optical fiber 4 laid on the parking space 6 is arranged in multiple loops in an elliptical shape to improve the sensitivity of the temperature-sensing optical fiber 4.
[0023] Furthermore, the host computer 2 also includes a temperature measurement system client, which is connected to the industrial control computer 201. The host computer 2 processes the information sent by the distributed fiber optic temperature measurement host 1 through the temperature measurement system client software, and displays the real-time and historical temperatures in the form of a three-dimensional heat map, a partition list, and a temperature curve in combination with the distribution map of the vehicles loaded on the deck 5 of the roll-on / roll-off ship. Alarm information is also displayed in a list and alarm records are stored for query.
[0024] Furthermore, the parking spaces 6 are arranged in a rectangular array on the deck 5 to facilitate the laying of temperature-sensing optical fibers 4.
[0025] In summary, when in use, this invention uses the temperature-sensing optical fiber 4 to measure whether there are any temperature abnormalities in the cargo and vehicles. During the transport of cargo on a roll-on / roll-off ship, once a vehicle experiences a temperature abnormality and its temperature rises rapidly, the signal is fed back to the distributed optical fiber temperature measurement host 1. The distributed optical fiber temperature measurement host 1 sends the collected temperature information, location information, and alarm information to the host computer 2. The host computer 2 processes the information sent by the distributed optical fiber temperature measurement host 2 through the temperature measurement system client software, and displays the real-time and historical temperatures in the form of a three-dimensional heat map, a zone list, and temperature curves, combined with the distribution map of the loaded vehicles on the deck of the roll-on / roll-off ship. The alarm information is also displayed in a list and alarm records are stored for query. The alarm output module 202 outputs an alarm signal and sends the alarm signal to the extended alarm module 3. The extended alarm module 3 receives the alarm information sent by the host computer 2, then displays the alarm information and issues an audible and visual alarm signal. The alarm information includes the abnormal temperature value and the location information of the abnormal temperature point.
[0026] Because the temperature sensing device of the distributed fiber optic temperature measurement system is an optical fiber with no internal electrical signal, it can meet the explosion-proof requirements when transporting hazardous materials. Furthermore, the single-channel detection range of the distributed temperature-sensing fiber optic system can reach 10km, with a positioning accuracy of less than 1m and a sampling time of less than 5s. By combining multiple channels and multiple hosts, monitoring of tens of thousands of detection points can be achieved. It is worth noting that the entire device is controlled by a master control button. Since the device matched with the control button is a common device and belongs to existing mature technology, its electrical connection relationship and specific circuit structure will not be described in detail here.
[0027] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A fire detection and alarm system for cargo on roll-on / roll-off ships, characterized in that: The system includes a deck (5), a temperature-sensing fiber (4), an extended alarm module (3), a distributed fiber optic temperature measurement host (1), and a host computer (2). Multiple parking spaces (6) are provided on the deck (5). The temperature-sensing fiber (4) is laid on the deck (5) and the parking spaces (6). The distributed fiber optic temperature measurement host (1) includes a main control module (101), a laser source drive module (102), a Raman wave division multiplexer (103), a photoelectric detection module (104), a high-speed data acquisition module (105), and a communication module (106). The Raman wave division multiplexer (103) is electrically connected to the temperature-sensing fiber (4), the laser source drive module (102), and the photoelectric detection module (104). The photoelectric detection module (104) is electrically connected to the high-speed data acquisition module (105), the high-speed data acquisition module (105) is electrically connected to the main control module (101), and the main control module (101) is electrically connected to the laser source drive module (102) and the communication module (106) respectively. The host computer (2) includes an industrial control computer (201) and an alarm output module (202). The communication module (106) is electrically connected to the industrial control computer (201), the industrial control computer (201) is electrically connected to the alarm output module (202), and the alarm output module (202) is electrically connected to the extended alarm module (3).
2. The fire detection and alarm system for cargo on a roll-on / roll-off ship according to claim 1, characterized in that: The distributed fiber optic temperature measurement host (1) and the host computer (2) are located in the central control room of the roll-on / roll-off ship, and the extended alarm module (3) is located in the bridge and duty room of the roll-on / roll-off ship.
3. A fire detection and alarm system for cargo on a roll-on / roll-off ship according to claim 1, characterized in that: The deck (5) is provided with a cable tray for laying temperature-sensing optical fibers (4).
4. A fire detection and alarm system for cargo on a roll-on / roll-off ship according to claim 1, characterized in that: The temperature-sensing optical fiber (4) laid on the parking space (6) is arranged in an elliptical shape with multiple loops.
5. A fire detection and alarm system for cargo on a roll-on / roll-off ship according to claim 1, characterized in that: The host computer (2) also includes a temperature measurement system client and is connected to the industrial control computer (201).
6. A fire detection and alarm system for cargo on a roll-on / roll-off ship according to claim 1, characterized in that: The parking spaces (6) are arranged in a rectangular array on the deck (5).