CN110426716B - Double-star cooperative ship rescue system and rescue method - Google Patents
Double-star cooperative ship rescue system and rescue method Download PDFInfo
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- CN110426716B CN110426716B CN201910729960.4A CN201910729960A CN110426716B CN 110426716 B CN110426716 B CN 110426716B CN 201910729960 A CN201910729960 A CN 201910729960A CN 110426716 B CN110426716 B CN 110426716B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
- G01S19/01—Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
- G01S19/13—Receivers
- G01S19/14—Receivers specially adapted for specific applications
- G01S19/17—Emergency applications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
- G01S19/01—Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
- G01S19/13—Receivers
- G01S19/24—Acquisition or tracking or demodulation of signals transmitted by the system
- G01S19/28—Satellite selection
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63C—LAUNCHING, HAULING-OUT, OR DRY-DOCKING OF VESSELS; LIFE-SAVING IN WATER; EQUIPMENT FOR DWELLING OR WORKING UNDER WATER; MEANS FOR SALVAGING OR SEARCHING FOR UNDERWATER OBJECTS
- B63C9/00—Life-saving in water
- B63C2009/0017—Life-saving in water characterised by making use of satellite radio beacon positioning systems, e.g. the Global Positioning System [GPS]
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- Engineering & Computer Science (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Computer Networks & Wireless Communication (AREA)
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- General Physics & Mathematics (AREA)
- Position Fixing By Use Of Radio Waves (AREA)
- Alarm Systems (AREA)
Abstract
The invention relates to a double-satellite cooperative ship rescue system and a rescue method, which comprise an electronic search and rescue satellite and an optical search and rescue satellite, wherein the electronic search and rescue satellite comprises a satellite-borne AIS (automatic identification system) search and rescue signal receiving terminal and an inter-satellite link sending terminal; the satellite-borne AIS search and rescue signal receiving terminal is used for receiving AIS search and rescue signals from ships in distress and extracting position information; the inter-satellite link sending terminal is used for sending the distress ship position information analyzed by the satellite-borne AIS search and rescue signal receiving terminal to the optical search and rescue satellite; the optical search and rescue satellite comprises an inter-satellite link receiving terminal, an optical camera and a ground data transmitting terminal, wherein the inter-satellite link receiving terminal is used for receiving distress ship position information from the electronic search and rescue satellite inter-satellite link transmitting terminal, the optical camera is used for imaging a given distress ship area, and the ground data transmitting terminal is used for transmitting an imaging result to a ground rescue center. The invention can provide electronic and optical multidimensional ship rescue information, thereby improving rescue efficiency and success rate of rescue.
Description
Technical Field
The invention relates to the technical field of aerospace communication and remote sensing, in particular to a double-satellite cooperative ship rescue system and a rescue method.
Background
The marine environment is complex and changeable, various emergency events at sea can directly bring disastrous losses to human lives and properties, the ship search and rescue system which is wide in coverage range, high in response speed and detailed in search and rescue information is constructed, timely rescue service is provided for ships in distress, and the losses of lives and properties can be effectively reduced.
The satellite search and rescue system has the advantages of being all-weather, long-distance, large-range, not limited by nationality and the like, can quickly determine the position of a ship in distress and carry out rescue by detecting distress signals sent by the ship by using the satellite, plays an important role in ship rescue, and is the most effective ship search and rescue means at present. Currently, the most mature satellite search and rescue system in the world is the global satellite search and rescue system developed jointly by canada, france, the united states and the former soviet union. China is also actively building a satellite search and rescue system by combining a Beidou navigation system with a maritime life-saving position-indicating beacon terminal.
An Automatic Identification System (AIS) for ships is a general marine navigation and radio communication System, which is a ship Automatic Identification System mandatory by international marine organization and used for transmitting the position and navigation information of ships. In recent years, satellite-borne AIS systems are mature and applied continuously, AIS signals of ships can be received in a large range, and the application field of the AIS signals is also expanded to the field of ship search and rescue. A satellite-borne AIS signal receiving terminal is carried on a satellite, and position and alarm information from a ship in distress is received through an AIS channel, so that information support can be provided for subsequent rescue work.
The invention discloses a Chinese patent with the patent application number of 201620371356.0 and the invention name of a ship-borne alarm search and rescue system and a search and rescue network, and discloses the ship-borne alarm search and rescue system and the search and rescue network.
The invention discloses a Beidou-based ship emergency search and rescue system, which is a Chinese patent with the patent application number of 201620615767.X and the invention name of 'the Beidou-based ship emergency search and rescue system'.
In summary, both the existing global satellite search and rescue system and the ship search and rescue system disclosed in the above patent provide only radio signals to obtain the position information and the distress signal of the ship in distress, the obtaining means is single, and the content of information for rescue is limited.
Disclosure of Invention
The technical problem of the invention is solved: the dual-satellite cooperative ship rescue system and the rescue method overcome the defects of the prior art, can obtain the position information and the distress signal of the ship in distress by using radio, can also obtain the image information of the ship in distress by using an optical means, and provide electronic and optical multidimensional information for rescue work, thereby improving the rescue efficiency and the rescue success rate.
The technical scheme of the invention is as follows:
a two-star collaborative marine rescue system, comprising: an electron search and rescue satellite and an optics search and rescue satellite, electron search and rescue satellite includes: the system comprises a satellite-borne AIS (automatic identification system) search and rescue signal receiving terminal and an inter-satellite link transmitting terminal; the satellite-borne AIS search and rescue signal receiving terminal is used for receiving AIS search and rescue signals from ships in distress and extracting position information; the inter-satellite link sending terminal is used for sending the distress ship position information extracted by the satellite-borne AIS search and rescue signal receiving terminal to the optical search and rescue satellite; the optical search and rescue satellite comprises: the system comprises an inter-satellite link receiving terminal, an optical camera and a ground data sending terminal, wherein the inter-satellite link receiving terminal is used for receiving distress ship position information from the electronic search and rescue satellite inter-satellite link sending terminal, the optical camera is used for imaging a given distress ship area, and the ground data sending terminal is used for sending an imaging result to a ground rescue center.
And the electronic search and rescue satellite and the optical search and rescue satellite interact the position information of the ship in distress through an inter-satellite link.
The optical search and rescue satellite and the electronic search and rescue satellite are configured on the same orbital plane, the electronic search and rescue satellite is arranged in front of the optical search and rescue satellite, and the optical search and rescue satellite is arranged behind the electronic search and rescue satellite.
The ground resolution of the optical camera is better than 1 meter, and the breadth is more than 4km multiplied by 2km under the condition that the satellite orbit height is 500 km.
The invention discloses a double-satellite cooperative ship rescue method of a double-satellite cooperative ship rescue system, which comprises the following steps:
(1) the satellite-borne AIS search and rescue signal receiving terminal receives AIS signals from ships in distress and extracts position information;
(2) the satellite-borne AIS search and rescue signal receiving terminal sends the extracted position information to the inter-satellite link sending terminal through a wire;
(3) the inter-satellite link sending terminal sends the position information of the ship in distress to the optical search and rescue satellite in a wireless way;
(4) the optical search and rescue satellite receives wireless signals from the electronic search and rescue satellite through the inter-satellite link receiving terminal and extracts the position information of the ship in distress;
(5) the inter-satellite link receiving terminal sends the extracted distress ship position information to the optical camera through a wire, the optical camera images the region where the distress ship is located, and the imaging result is sent to the ground data sending terminal;
(6) and the ground data sending terminal sends the imaging result to the ground search and rescue center.
Compared with the prior art, the invention has the advantages that:
the two-star cooperative ship rescue system and the rescue method not only can obtain the position information and the distress signal of the ship in distress by utilizing radio to solve the problem of where the ship in distress is, but also can combine an optical means with a microwave means, obtain the image information of the ship in distress by adopting the microwave guide optical means through the two-star cooperative work, provide electronic and optical multidimensional support for rescue work, solve the problems of damaged degree and surrounding sea condition of the ship in distress and further contribute to improving the rescue efficiency and the rescue success rate.
Drawings
The accompanying drawings, which are included to provide a further understanding of embodiments of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is a schematic structural diagram of a two-star cooperative ship rescue system according to an embodiment of the present invention;
fig. 2 is a schematic flow chart of a two-star cooperative ship rescue method according to an embodiment of the present invention;
FIG. 3 is a diagram of an electronic search and rescue satellite according to an embodiment of the present invention;
fig. 4 is a structural diagram of an optical search and rescue satellite according to an embodiment of the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the specific embodiments of the present invention and the accompanying drawings. It is to be understood that the described embodiments are merely a few embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
The technical scheme provided by the embodiment of the invention is described in detail below with reference to the accompanying drawings.
As shown in fig. 1, an embodiment of the present invention provides a two-star collaborative ship rescue system, including: an electronic search and rescue satellite and an optical search and rescue satellite. The electronic search and rescue satellite is provided with a satellite-borne AIS search and rescue signal receiving terminal and an inter-satellite link transmitting terminal, the satellite-borne AIS search and rescue signal receiving terminal is in wired connection with the inter-satellite link transmitting terminal, the satellite-borne AIS search and rescue signal receiving terminal is used for receiving AIS search and rescue signals from ships in danger and extracting position information, and the inter-satellite link transmitting terminal is used for transmitting the ship position information extracted by the satellite-borne AIS search and rescue signal receiving terminal to the optical search and rescue satellite. The optical search and rescue satellite is provided with an inter-satellite link receiving terminal, an optical camera and a ground data transmitting terminal, the optical camera is connected with the inter-satellite link receiving terminal and the ground data transmitting terminal through a wire, the inter-satellite link receiving terminal is used for receiving signals from the inter-satellite link transmitting terminal and analyzing position information of a ship in danger, the optical camera is used for imaging the area where the ship in danger is located, and the ground data transmitting terminal is used for transmitting the imaged image to a ground search and rescue center.
The working principle of the double-star cooperative ship rescue system provided by the embodiment of the invention is specifically explained as follows:
specifically, when the two-satellite cooperative ship rescue system provided by the embodiment of the invention is applied, the satellite-borne AIS search and rescue signal receiving terminal carried by the electronic search and rescue satellite is responsible for receiving a signal containing distress information and a distress coordinate position from a distress ship. As shown in fig. 3, the AIS receiver includes an AIS antenna, a radio frequency receiving module, and an AIS digital processing module. The AIS antenna is installed on the electronic search and rescue satellite towards the ground and is responsible for receiving radio frequency signals sent by the AIS position indicator of the ship in distress. The radio frequency receiving module is connected with the AIS receiving antenna through a radio frequency cable and is responsible for filtering, amplifying and down-converting radio frequency signals to intermediate frequency. The AIS digital processing module mainly completes conversion from an intermediate frequency signal to a digital signal, and completes functions of demodulation, frame decoding, data output and the like of the AIS signal. And the AIS digital processing module is connected with the inter-satellite link transmitting terminal and sends the position information of the demodulated search and rescue signals to the inter-satellite link transmitting terminal.
Furthermore, the AIS antenna in the embodiment of the invention can adopt a cone-screw antenna, and the cone-screw antenna has a wide beam covering the earth view angle range, so that the requirement of wide area reception of AIS distress signals can be met, and the working frequency range is 160 MHz-165 MHz. The AIS digital processing module mainly comprises an AD sampling chip and a digital processing chip, wherein the AD sampling chip can adopt AD9361, and the digital processing chip can adopt FPGA Virtex 4 with an aerospace grade. The AIS digital processing module and the inter-satellite link transmission terminal can be connected through an LVDS (Low-Voltage Differential Signaling) interface.
Specifically, when the two-satellite cooperative ship rescue system provided by the embodiment of the invention is applied, an inter-satellite link sending terminal carried by an electronic search and rescue satellite is responsible for sending the coordinate position of a ship in distress to an optical search and rescue satellite. As shown in fig. 3, the inter-satellite link transmitting terminal includes an inter-satellite communication module and an inter-satellite antenna.
Further, the inter-satellite communication module can adopt a LoRa communication module with a communication frequency of 424 MHz. LoRa adopts the linear frequency modulation signal suitable for long-distance transmission as a modulation signal and a synchronous signal, and can achieve the effects of low cost, low power consumption and long-distance transmission. The inter-satellite antenna can adopt a wide-beam helical antenna with the working frequency band of 424MHz +/-1 MHz.
Specifically, when the two-satellite cooperative ship rescue system provided by the embodiment of the invention is applied, the inter-satellite link receiving terminal carried by the optical search and rescue satellite is used for receiving signals from the electronic search and rescue satellite and analyzing the position information of the ship in distress contained in the signals. As shown in fig. 4, in the embodiment of the present invention, the inter-satellite link receiving terminal includes an inter-satellite communication module and an inter-satellite antenna.
Further, the inter-satellite communication module can also adopt an LoRa communication module, and is matched with the inter-satellite communication module of the inter-satellite link transmitting terminal, and the communication frequency is also 424 MHz.
Specifically, when the double-satellite cooperative ship rescue system provided by the embodiment of the invention is applied, an optical camera carried by an optical search and rescue satellite is used for imaging a ship area in danger. As shown in fig. 4, the optical camera includes an optical signal processing circuit and an optical sensor. The optical signal processing circuit is used for receiving the position information of the ship in distress from the inter-satellite link receiving terminal, controlling the camera to image according to the position information of the ship in distress, processing imaging data and sending the imaging data to the ground data sending terminal. The optical sensor is used to image a given area.
Furthermore, the optical signal processing circuit may use an FPGA as a core processor, and may be connected to the inter-satellite link receiving terminal, the ground data transmitting terminal, and the optical sensor through LVDS interfaces.
Further, the optical sensor can adopt a color sensor lens, a color image with more than standard 4K high definition can be obtained, the resolution of the image element to the ground at the track height of 500 kilometers is better than 1 meter, and the main technical indexes are shown in table 1.
TABLE 1 (optical sensor main parameters)
| Resolution ratio | 3840×2160 |
| Ground pixel resolution | ≤1m(H＝500km) |
| Breadth width | 4.33km×2.44km(H＝500km) |
| Image color | Bayer code, RGB |
| Data compression | JPEG2000 |
Specifically, when the two-satellite cooperative ship rescue system provided by the embodiment of the invention is applied, the ground data sending terminal carried by the optical search and rescue satellite is used for downloading the image data after the ship area in distress is imaged to the ground rescue center. The ground data transmitting terminal comprises a ground data transmitting processing module, a ground data transmitting radio frequency module and a ground data transmitting antenna. The ground data sending and processing module is used for receiving information from the optical signal processing circuit, converting the information into an analog signal and sending the analog signal to the ground data sending radio frequency module, the ground data sending radio frequency module is responsible for up-converting, filtering and amplifying the signal from the ground sending and processing module and then sending the signal to the ground data sending antenna, and the ground sending antenna is responsible for converting the signal into a wireless signal and sending the wireless signal to the ground station.
Furthermore, the ground data sending and processing module can select a Zynq-7000 SOC processor as a core processing unit. The ground transmitting antenna can select a Ka phased array antenna to realize directional high-speed data transmission to the ground.
Further, the two-star cooperative ship rescue system according to the embodiment of the present invention may configure the transmission link, the transmission rate, and the transmission frequency of the two-star cooperative ship rescue system by using the configuration relationship shown in table 2.
Table 2 (Transmission configuration relationship)
| Transmission link | Transmission rate | Frequency of transmission |
| AIS search and rescue signal receiving link | 1kbps/2kpbs | 161.975MHz/162.025MHz |
| LoRa inter-satellite transmit link | 4kbps/8kpbs | 424MHz |
| Ground data transmission link | 10Mbps/20Mpbs | 30GHz |
In a second aspect, the invention further discloses a rescue method using the double-star cooperative ship rescue system, as shown in fig. 2, the rescue method includes:
the satellite-borne AIS search and rescue signal receiving terminal receives AIS signals from ships in distress and extracts position information;
the satellite-borne AIS search and rescue signal receiving terminal sends the extracted position information to the inter-satellite link sending terminal through a wire;
the inter-satellite link sending terminal sends the position signal of the ship in distress to the optical search and rescue satellite in a wireless way;
the optical search and rescue satellite receives wireless signals from the electronic search and rescue satellite through the inter-satellite link receiving terminal and analyzes the position information of the ship in distress;
the inter-satellite link receiving terminal sends the analyzed position information of the ship in danger to the optical camera through a wire, the optical camera images the area where the ship in danger is located and sends the image to the ground data sending terminal;
and the ground data sending terminal sends the imaging result to the ground search and rescue center.
Therefore, the double-satellite cooperative ship rescue system and the rescue method provided by the embodiment of the invention can not only obtain the position information and the distress signal of the ship in distress by using radio, but also obtain the image information of the ship in distress by using an optical means, and provide electronic and optical multidimensional information for rescue work, thereby improving the rescue efficiency and the rescue success rate.
Finally, it should be noted that: the above examples are only for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (2)
1. The utility model provides a two stars are boats and ships rescue system in coordination which characterized in that: the two-star collaborative ship rescue system comprises: an electron search and rescue satellite and an optics search and rescue satellite, electron search and rescue satellite includes: the system comprises a satellite-borne AIS (automatic identification system) search and rescue signal receiving terminal and an inter-satellite link transmitting terminal; the satellite-borne AIS search and rescue signal receiving terminal is used for receiving AIS search and rescue signals from ships in distress and extracting position information; the inter-satellite link sending terminal is used for sending the distress ship position information extracted by the satellite-borne AIS search and rescue signal receiving terminal to the optical search and rescue satellite; the optical search and rescue satellite comprises: the system comprises an inter-satellite link receiving terminal, an optical camera and a ground data sending terminal, wherein the inter-satellite link receiving terminal is used for receiving distress ship position information from the electronic search and rescue satellite inter-satellite link sending terminal, the optical camera is used for imaging a given distress ship area, and the ground data sending terminal is used for sending an imaging result to a ground rescue center;
the electronic search and rescue satellite and the optical search and rescue satellite interact position information of the ship in distress through an inter-satellite link;
the optical search and rescue satellite and the electronic search and rescue satellite are configured on the same orbital plane, the electronic search and rescue satellite is in front of the optical search and rescue satellite, and the optical search and rescue satellite is behind the electronic search and rescue satellite;
the ground resolution of the optical camera is better than 1 meter, and the breadth is more than 4km multiplied by 2km under the condition that the satellite orbit height is 500 km.
2. A two-star cooperative ship rescue method using the two-star cooperative ship rescue system according to claim 1, characterized in that: the rescue method comprises the following steps:
(1) the satellite-borne AIS search and rescue signal receiving terminal receives AIS signals from ships in distress and extracts position information;
(2) the satellite-borne AIS search and rescue signal receiving terminal sends the extracted position information to the inter-satellite link sending terminal through a wire;
(3) the inter-satellite link sending terminal sends the position information of the ship in distress to the optical search and rescue satellite in a wireless way;
(4) the optical search and rescue satellite receives wireless signals from the electronic search and rescue satellite through the inter-satellite link receiving terminal and extracts the position information of the ship in distress;
(5) the inter-satellite link receiving terminal sends the extracted distress ship position information to the optical camera through a wire, the optical camera images the region where the distress ship is located, and the imaging result is sent to the ground data sending terminal;
(6) and the ground data sending terminal sends the imaging result to the ground search and rescue center.
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| CN111510195B (en) * | 2020-03-30 | 2021-02-09 | 中国人民解放军军事科学院国防科技创新研究院 | Space-based search and rescue receiving and transmitting terminal |
| CN112865854B (en) * | 2020-12-31 | 2021-09-17 | 军事科学院***工程研究院网络信息研究所 | Emergency lifesaving communication method based on multi-beam communication satellite |
| CN115441933A (en) * | 2022-08-31 | 2022-12-06 | 山东航天电子技术研究所 | Software-defined satellite-borne universal communication system |
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