CN113242569A - Redundant communication system for offshore multi-ship cooperative operation - Google Patents
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- H—ELECTRICITY
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- H04W24/04—Arrangements for maintaining operational condition
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Abstract
The invention relates to a redundant communication system for offshore multi-ship cooperative operation. Each ship is provided with two communication systems, namely a main system and a standby system, mutual monitoring and access are realized between the main system and the standby system, and the standby system can directly take over the main system to realize communication with other ships under the condition that the communication of the main system fails; and the main system and the standby system can realize mutual communication access and remote control under the constructed wireless local area network through a TDD wireless transmission technology among the ships. The invention can effectively deal with various emergency situations when a plurality of ships work in coordination at sea, and improves the stability and reliability of system communication and work coordination.
Description
Technical Field
The invention relates to a redundant communication system for offshore multi-ship cooperative operation, in particular to a redundant communication system for realizing the installation, the removal or the maintenance operation of an offshore platform by the cooperation of multiple ships, belonging to the innovative technology of the redundant communication system for the offshore multi-ship cooperative operation.
Background
With the increasing depth of oil and gas development, offshore platforms are developing towards large-scale and comprehensive. The overall weight of the equipment or modules used on the offshore platform is increasing, so that the difficulty in mounting and dismounting the equipment or modules used on the offshore platform is increasing. Single vessel lifting or floatover operations are considered a safe and cost effective method, but face several challenges, such as limited availability of the vessel, high cost, etc. Compared with the traditional single-ship hoisting or floating support, the multi-ship cooperative operation technology has the characteristics of low cost, short operation time, high hoisting capacity, wide application range and the like. In the multi-ship cooperative operation process, in order to ensure that the ship stably and safely operates under complex sea conditions and maintain multi-ship cooperative operation and provide a delay-free communication environment for field command, a stable communication environment and high-efficiency real-time data transmission capability must be met. Different from a general communication system, the maritime communication has the characteristics of severe environmental conditions, difficult data transmission, delayed packet loss and the like, and extremely high requirements on the efficiency, stability and reliability of the maritime communication system are provided. Therefore, those skilled in the art are dedicated to develop a redundant communication system for offshore multi-vessel cooperative work, which effectively deals with various emergencies during offshore multi-vessel cooperative work, so as to improve the stability and reliability of system communication and work cooperation.
Disclosure of Invention
The present invention has been made in view of the above problems, and it is an object of the present invention to provide a redundant communication system for offshore multi-ship cooperative work. The invention can effectively deal with various emergency situations when a plurality of ships work in coordination at sea, and improves the stability and reliability of system communication and work coordination.
The technical scheme of the invention is as follows: the redundant communication system for offshore multi-ship cooperative operation is characterized in that each ship is provided with two communication systems, namely a main system and a standby system, mutual monitoring and access are realized between the main system and the standby system, and the standby system can directly take over the main system to realize communication with other ships under the condition that the communication of the main system fails; and the main system and the standby system can realize mutual communication access and remote control under the constructed wireless local area network through a TDD wireless transmission technology among the ships.
The invention can stably and high-speed realize the bidirectional remote transmission of data instructions in the multi-ship cooperative operation, has high redundancy, can effectively deal with various emergency situations in the offshore cooperative operation, and improves the stability and reliability of system communication and operation cooperation. The invention provides a convenient and practical redundant communication system for offshore multi-ship cooperative operation.
Drawings
FIG. 1 is a schematic diagram of the present invention;
FIG. 2 is a schematic diagram of the connection between the main system and the standby system of the present invention and the network cabinet of the centralized control room of the ship
Fig. 3 is a schematic view of an installation structure of the antenna unit of the present invention.
Detailed Description
Example (b):
the schematic diagram of the invention is shown in fig. 1, each ship of the redundant communication system for offshore multi-ship cooperative operation is provided with two communication systems, namely a main system and a standby system, the main system and the standby system can monitor and access each other, and the standby system can directly take over the main system to realize communication with other ships under the condition that the communication of the main system fails; and the main system and the standby system can realize mutual communication access and remote control under the constructed wireless local area network through a TDD wireless transmission technology among the ships.
The main system and the main system, the standby system and the standby system, and the main system and the standby system can all realize communication access and remote control, and can all realize mutual access and control as long as the systems are under the established local area network. The ship host realizes the functions of mutual access and control under a local area network formed by hardware and network access.
In this embodiment, the main system and the standby system are composed of a host, a photoelectric converter, an exchanger, and an antenna unit, the host of the main system and the standby system are connected to the exchanger through network cables, and the exchange is used to realize interconnection and data intercommunication, so as to realize mutual monitoring and access between the main system and the standby system, the host sends command signals, the exchanger transmits electrical signals, the exchanger is connected to the photoelectric converter through network cables to convert the electrical signals into optical signals, the optical signals are transmitted to a centralized control room network cabinet machine arranged in a ship centralized control room through optical fibers, the photoelectric converter arranged in the centralized control room network cabinet machine converts the optical signals into electrical signals, the electrical signals are transmitted to the exchanger arranged in the centralized control room network cabinet machine through network cables, and then the antenna unit converts the electrical signals into electromagnetic waves to be transmitted, and the antenna units arranged by other ships receive the data to realize data transmission.
The exchanger provides data access to realize data intercommunication, the main system and the standby system realize mutual monitoring and access through the host computer, and the host computer is connected with a centralized control room network cabinet machine arranged in a ship centralized control room through a network cable to support one-to-many and ad hoc network transmission application, thereby realizing multi-ship network interconnection and intercommunication.
The wireless self-organizing network technology of the invention is the organic combination of computer network technology and mobile wireless communication technology, and is formed by the collection of a group of units (such as main and standby systems of the ship) provided with wireless transmitting and receiving devices, and each unit not only has a receiving device, but also can be used as a transmitting device to play a role in communication. In the wireless ad hoc network technology, each unit can participate in the communication process, and in an emergent emergency, even if a certain unit is damaged, other units can still communicate with each other to play a communication role. The one-to-many transmission application means that any one system in a local area network can send a signal instruction to other systems, the signals are converted into optical signals through a ship network cabinet machine, and then the antenna units convert the optical signals into electromagnetic waves and send the electromagnetic waves to the antenna units of other systems.
In this embodiment, the two sets of systems of the main system and the standby system implement mutual monitoring and access by establishing socket communication, and in a normal working stage, the two sets of systems of the main system and the standby system send signals at a fixed frequency to obtain data for backup and confirm whether the main system and the standby system normally work, and once the systems fail, and after the signals are interrupted, a pipe connecting mechanism in a program is triggered to replace the failed systems to continue working, and the principle of the communication mechanism is as follows: in TCP/IP network applications, the main mode of interaction between two communicating processes is Client/Server mode (Client/Server model), i.e. a Client sends a service request to a Server, and the Server provides corresponding service after receiving the request.
In this embodiment, the client/server mode process adopts an active request mode, and the specific method is as follows:
firstly, a server side needs to be started firstly and provides corresponding services according to a request:
1) open a communication channel and inform the local host that it would like to receive client requests at a recognized address (informed port, e.g., 21 for FTP);
2) waiting for a client request to arrive at the port;
3) a repeat service request is received, the request is processed and a reply signal is sent. A concurrent service request is received and a new process is activated to handle the client request (e.g., fork, exec in UNIX systems). The new process processes this client request and does not need to respond to other requests. After the service is finished, closing the communication link between the new process and the client and terminating;
4) returning to the second step, waiting for another client request;
5) closing the server;
a client side:
1) opening a communication channel and connecting to a specific port of a host where the server is located;
a communication channel refers to a network path for receiving or transmitting signals;
2) sending a service request message to a server, waiting and receiving a response; continuing to make a request;
such as access requests, data transfer requests, etc.
3) Closing the communication channel and terminating after the request is finished;
under normal conditions, the main system is working, the standby system is monitoring, and then the main system is the server side, and the standby system is the client side.
In this embodiment, communication access and remote control are implemented between the vessels by using a TDD wireless transmission technology, and the specific method is as follows:
in a mobile communication system of TDD mode, different time slots using the same frequency carrier are used as the bearer of the channel for receiving and transmitting, the unidirectional resource is discontinuous in time, the time resource is distributed in two directions, when signals are transmitted between two ships, a main ship main system sends signals to a secondary ship main system in a certain time period, and the secondary ship main system sends signals to the main ship main system in the other time period, so that the main ship main system and the secondary ship main system must cooperate and accord to work smoothly.
For example, the uplink and downlink data rates may be the same and symmetrical by dividing into 4 slots, and selecting 1, 2 slots as uplink and 3, 4 slots as downlink. Or 1 time slot uplink and 2-4 time slots downlink can be selected, so that the downlink rate is 3 times of the uplink rate and is asymmetric. Thus, TDD can be said to be suitable for asymmetric and symmetric data transmission services.
In this embodiment, the antenna unit and the communication system host are installed on the compass deck layer, the antenna unit 1 is installed by using the hoop 2, the antenna unit 1 is connected with the fixing rod 4 through the hoop 2, and the fixing rod 4 is fixed on the compass deck layer of the ship. The antenna unit 1 is connected to a host computer through a cable 3. The length of the cable 3 is customized according to actual requirements.
In this embodiment, the protection level adopted by the host of the communication system is IP56, and the connector used for line connection is a waterproof aviation connector.
In this embodiment, the transmission distance of the antenna unit of the ship communication system is greater than 15km in an open sight distance environment.
The antenna unit is a glass fiber reinforced plastic antenna, the working frequency range of the antenna unit is 800-2700MHz, and the maximum power is 100W. In this embodiment, the operating frequency of the antenna unit is 2300MHz or 2350 MHz.
In this embodiment, the single-ship communication system adopts a dual-antenna diversity design, which ensures redundancy of the communication system and makes signal transmission quality more stable; the communication system supports bidirectional transmission of network data and bidirectional transmission of TTL serial port data, the data link can adjust the transmission rates of an uplink data link and a downlink data link according to the proportion as required, three frequency band selections of 800MHz/1.4GHz/2.4GHz and four frequency band selections of 3MHz/5MHz/10MHz/20MHz are supported.
In this embodiment, the two sets of systems of the main system and the standby system implement mutual monitoring and access by establishing socket communication, and in a normal working stage, the two sets of systems of the main system and the standby system send signals at a fixed frequency to obtain data for backup and confirm whether the main system and the standby system normally work, and once the systems fail, and after the signals are interrupted, a pipe connecting mechanism in a program is triggered to replace the failed systems to continue working, and the principle of the communication mechanism is as follows: in TCP/IP network applications, the main mode of interaction between two communicating processes is Client/Server mode (Client/Server model), i.e. a Client sends a service request to a Server, and the Server provides corresponding service after receiving the request.
The operating characteristics of the TDD duplex mode make TDD have the following advantages: the method has the advantages of flexibly configuring frequency, using scattered frequency bands which are not easy to use by an FDD system, improving the proportion of downlink time slots by adjusting the conversion points of the uplink time slots and the downlink time slots, well supporting asymmetric services, having the consistency of the uplink and the downlink channels, sharing part of radio frequency units for receiving and sending by a base station, reducing the equipment cost, reducing the complexity of equipment by only one switch without a receiving and sending isolator when receiving the uplink and downlink data, having the reciprocity of the uplink and downlink channels, better adopting a transmission preprocessing technology and effectively reducing the processing complexity of a mobile terminal.
The invention utilizes redundancy technology, also called reserve technology and sometimes called disaster recovery backup technology, which is a means for improving the reliability of the system by utilizing a parallel model of the system. When the main system fails, the program can start the standby system to take over in time, and communication and operation among multiple ships are kept. The multi-ship cooperative redundant communication system can effectively deal with various emergency situations during offshore multi-ship cooperative operation, and improves the stability and reliability of system communication and operation cooperation. The redundancy principle is that two or more sets of same hardware with the same function are used as reserves, a main system crashes, and a standby system can take over directly.
Aiming at multi-ship cooperative operation, each ship is provided with two sets of communication systems, mutual monitoring and access between the two sets of systems are realized through a host program, and a standby system can directly take over a main system to realize communication with other ships under the condition that the communication of the main system fails; and communication access and remote control are realized among the ships through a TDD wireless transmission technology. The multi-ship cooperative redundant communication system can effectively deal with various emergency situations during offshore multi-ship cooperative operation, and improves the stability and reliability of system communication and operation cooperation.
Claims (10)
1. A redundant communication system for offshore multi-ship cooperative operation is characterized in that each ship is provided with two communication systems, namely a main system and a standby system, mutual monitoring and access are realized between the main system and the standby system, and the standby system can directly take over the main system to realize communication with other ships under the condition that the communication of the main system fails; and the main system and the standby system can realize mutual communication access and remote control under the constructed wireless local area network through a TDD wireless transmission technology among the ships.
2. The redundant communication system for offshore multi-ship cooperative operation as claimed in claim 1, wherein the main system and the backup system are composed of a host, a photoelectric converter, a switch and an antenna unit, the host of the main system and the backup system are connected to the switch through a network cable, and the switch is used for realizing interconnection and data intercommunication, so as to realize mutual monitoring and access between the main system and the backup system, the host sends out a command signal, transmits an electric signal through the switch, the switch is connected to the photoelectric converter through a network cable, converts the electric signal into an optical signal, transmits the optical signal to the centralized control room network cabinet unit arranged in the ship centralized control room through an optical fiber, converts the optical signal into an electric signal by using the photoelectric converter arranged in the centralized control room network cabinet unit, and transmits the electric signal from the network cable to the switch arranged in the centralized control room network cabinet unit, and the antenna unit is connected with the antenna unit through a cable, converts the electric signal into an electromagnetic wave and sends the electromagnetic wave out, and the electromagnetic wave is received by the antenna units arranged on other ships, so that data transmission is realized.
3. The redundant communication system for offshore multi-ship cooperative operation according to claim 1, wherein the two sets of systems of the main system and the standby system realize mutual monitoring and access by establishing socket communication, and in a normal working stage, the two sets of systems of the main system and the standby system send signals at a fixed frequency to acquire data for backup and confirm whether the main system and the standby system work normally, and once the systems fail and the signals are interrupted, a pipe connecting mechanism in a program is triggered to replace the failed systems to continue to complete work, and the principle of the communication mechanism is as follows: in TCP/IP network applications, the main mode of interaction between two processes of communication is client/server mode, i.e. a client sends a service request to a server, and the server provides a corresponding service after receiving the request.
4. The redundant communication system for offshore multi-vessel cooperative work according to claim 3, wherein the client/server mode process adopts an active request mode, and the specific method is as follows:
firstly, a server side needs to be started firstly and provides corresponding services according to a request:
1) open a communication channel and inform the local host that it would like to receive client requests at a recognized address (informed port, e.g., 21 for FTP);
2) waiting for a client request to arrive at the port;
3) receiving a repeated service request, processing the request and sending a response signal, receiving a concurrent service request, activating a new process to process the client request, processing the client request by the new process without responding to other requests, closing a communication link between the new process and the client after the service is completed, and terminating;
4) returning to the second step, waiting for another client request;
5) closing the server;
a client side:
1) opening a communication channel and connecting to a specific port of a host where the server is located;
2) sending a service request message to a server, waiting and receiving a response; continuing to make a request;
3) closing the communication channel and terminating after the request is finished;
under normal conditions, the main system is working, the standby system is monitoring, and then the main system is the server side, and the standby system is the client side.
5. The redundant communication system for offshore multi-vessel cooperative work according to claim 1, wherein communication access and remote control are realized between the vessels by a TDD wireless transmission technology, and the specific method is as follows:
in a mobile communication system of TDD mode, different time slots using the same frequency carrier are used as the bearer of the channel for receiving and transmitting, the unidirectional resource is discontinuous in time, the time resource is distributed in two directions, when signals are transmitted between two ships, a main ship main system sends signals to a secondary ship main system in a certain time period, and the secondary ship main system sends signals to the main ship main system in the other time period, so that the main ship main system and the secondary ship main system must cooperate and accord to work smoothly.
6. The redundant communication system for offshore multi-ship cooperative operation according to any one of claims 1 to 5, wherein the antenna unit and the host are installed on a compass deck layer, the antenna unit is installed by using a hoop, and the host is fixed.
7. The redundant communication system for offshore multi-ship cooperative operation according to claim 6, wherein the host machine adopts a protection grade of IP56, and the connector for line connection is a waterproof aviation connector.
8. The redundant communication system for offshore multi-vessel cooperative work according to claim 6, wherein the transmission distance of the antenna unit in an open-line-of-sight environment is greater than 15 km.
9. The redundant communication system for offshore multi-ship cooperative operation as claimed in claim 6, wherein the antenna unit is a glass fiber reinforced plastic antenna with a frequency range of 800-.
10. The redundant communication system for offshore multi-ship cooperative work according to claim 6, wherein the single-ship communication system adopts a dual-antenna diversity design, the communication system supports bidirectional transmission of network data and bidirectional transmission of TTL serial data, the data link adjusts the transmission rate of the uplink and downlink data links in proportion as required, and supports three frequency band selections of 800MHz/1.4GHz/2.4GHz and four frequency band selections of 3MHz/5MHz/10MHz/20 MHz.
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- 2020-12-28 CN CN202011573189.5A patent/CN113242569A/en active Pending
Patent Citations (7)
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CN101488101A (en) * | 2008-01-18 | 2009-07-22 | 研祥智能科技股份有限公司 | CPCI redundancy stand-by system |
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