CN104599533B - Navigation channel traffic density and navigation channel Meteorological Index delivery system - Google Patents
Navigation channel traffic density and navigation channel Meteorological Index delivery system Download PDFInfo
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Abstract
The present invention relates to a kind of navigation channel traffic density and navigation channel Meteorological Index delivery system, described delivery system comprises ship's speed checkout equipment, positioning equipment, radio data communication equipment and opertaing device, radio data communication equipment and positioning equipment connect the multiple relevant navigation channel to obtain boats and ships, opertaing device and radio data communication equipment connect navigation channel traffic density and the navigation channel Meteorological Index in the multiple relevant navigation channel to obtain boats and ships, opertaing device is connected the current driving speed to obtain boats and ships with ship's speed checkout equipment, opertaing device is according to the current driving speed of boats and ships, the navigation channel traffic density in the multiple relevant navigation channel of boats and ships and navigation channel Meteorological Index determine whether to send and switch navigation channel signal.The present invention, by the relevant information in the wireless current navigation channel of acquisition boats and ships and multiple replacement navigation channel, determines whether carry out navigation channel switch prompting, is convenient to driver's flexible design travel route, improves efficiency of navigation.
Description
The divisional application of the patent of " navigation channel traffic density and navigation channel Meteorological Index delivery system " that the present invention is application number is 2014103678613, the applying date, to be July 29, denomination of invention in 2014 be.
Technical field
The present invention relates to ship running control field, particularly relate to a kind of navigation channel traffic density and navigation channel Meteorological Index delivery system.
Background technology
Course line routes, refers to the surface navigation route of boats and ships between two places, the concrete course line of each flight number, the situation such as geography, the hydrology, meteorology that should be regional with navigation according to navigational duty, and boats and ships situation is drafted.Course line refers to the route of linking up two places in a broad sense, generally with origin and destination name, adds the Shen Wen course line in course line, Shanghai to Wenzhou in as extremely Canadian in China; Refer to concrete track line in the narrow sense, comprise the planned course be drawn on sea chart.
May there be a lot of bar in course line between two places, in the driving process of boats and ships, and the formulation in the course line of driver, most important to ship running efficiency.But, because the traffic on the water surface especially on sea, meteorology change all the time, cannot know in advance before traveling, therefore, before navigation, driver also cannot to determine between two places which bar course line can the highest as running efficiency, take time and effort minimum optimal route, and can only constantly to revise in the process of moving.
Be all according to driver in navigation process to the correction of steamer line in prior art, the visually water surface observations of distance, the navigation experience in conjunction with oneself carries out formulating.There is following drawback in such steamer line amendment scheme: (1) driver's viewing distance is limited, and decision-making material is not enough, causes course line to need frequent correction; (2) the navigation experience of each driver is different, and revised course line navigation effect is also different, and revised course line is not often optimal route.
Therefore, need a kind of navigation channel traffic density and navigation channel Meteorological Index delivery system, overcome and too rely on manpower in the amendment scheme of existing course line and the technical matters causing the inadequate science of decision process, by navigation channel traffic density and the navigation channel Meteorological Index in the multiple relevant navigation channel of Real-time Obtaining boats and ships, and determine whether to send switching navigation channel signal based on the current driving speed of boats and ships, for the correction of steamer line provides important references, thus ensure that the efficiency of navigation, improve the on-road efficiency of shipping transport side.
Summary of the invention
In order to solve the problem, the invention provides a kind of navigation channel traffic density and navigation channel Meteorological Index delivery system, navigation channel traffic density and the navigation channel Meteorological Index that administrative section obtains the multiple relevant navigation channel of boats and ships is respectively resembled by the radio data communication equipment of introducing compatible many standards is gentle from boats and ships on-site ship-handling center, and only when current driving inefficiency, just determine whether to send based on the navigation channel traffic density in navigation channel and navigation channel Meteorological Index and switch navigation channel signal, the switching navigation channel of display correspondence is for deck officer's decision-making, for driver provides important reference data and good user's experience.
According to an aspect of the present invention, provide a kind of navigation channel traffic density and navigation channel Meteorological Index delivery system, described delivery system comprises ship's speed checkout equipment, positioning equipment, radio data communication equipment and opertaing device, radio data communication equipment and positioning equipment connect the multiple relevant navigation channel to obtain boats and ships, opertaing device and radio data communication equipment connect navigation channel traffic density and the navigation channel Meteorological Index in the multiple relevant navigation channel to obtain boats and ships, opertaing device is connected the current driving speed to obtain boats and ships with ship's speed checkout equipment, opertaing device is according to the current driving speed of boats and ships, the navigation channel traffic density in the multiple relevant navigation channel of boats and ships and navigation channel Meteorological Index determine whether to send and switch navigation channel signal.
More specifically, in described navigation channel traffic density and navigation channel Meteorological Index delivery system, comprise further: user input device, receive the input of user, and navigation channel traffic density threshold value, navigation channel Meteorological Index threshold value are set according to the input of user and start air route switch speed; Ship's speed checkout equipment, detects and exports the current driving speed of boats and ships; Positioning equipment, provides multiple replacement navigation channels in boats and ships current driving navigation channel and described current driving navigation channel; Radio data communication equipment, connect described positioning equipment to receive described current driving navigation channel and described multiple replacement navigation channel, pass through wireless data communication network, described current driving navigation channel and described multiple replacement navigation channel are sent to the ship-handling center of the current position of boats and ships is gentle resembles administrative authority, to receive the navigation channel traffic density in described current driving navigation channel and described multiple replacement navigation channel from ship-handling center, receive the navigation channel Meteorological Index in described current driving navigation channel and described multiple replacement navigation channel from meteorological administrative authority; Opertaing device, connect described radio data communication equipment to obtain the navigation channel traffic density in described current driving navigation channel and described multiple replacement navigation channel, obtain the navigation channel Meteorological Index in described current driving navigation channel and described multiple replacement navigation channel, connect user input device to receive navigation channel traffic density threshold value, navigation channel Meteorological Index threshold value and to start air route switch speed, connect ship's speed checkout equipment to obtain described current driving speed, when described current driving speed is less than or equal to startup air route switch speed, start air route switch mode; Display device, connect described opertaing device, to show the navigation channel traffic density in described current driving navigation channel and described multiple replacement navigation channel, show the navigation channel Meteorological Index in described current driving navigation channel and described multiple replacement navigation channel, show described current driving speed, and highlighted display and first switches replacement navigation channel corresponding to navigation channel signal or highlighted display and second switches replacement navigation channel corresponding to navigation channel signal; Memory device, connects described opertaing device, to store the navigation channel traffic density in described current driving navigation channel and described multiple replacement navigation channel, stores the navigation channel Meteorological Index in described current driving navigation channel and described multiple replacement navigation channel; Voice playing equipment, connects described opertaing device, receives first and switches navigation channel signal or second and switch navigation channel signal, and plays and first switch navigation channel signal or second and switch voice prompted file corresponding to navigation channel signal; Wherein, in the air route switch mode of opertaing device, there is a certain replacement navigation channel, when the difference making the navigation channel traffic density in current driving navigation channel deduct this replacement navigation channel is more than or equal to described navigation channel traffic density threshold value, send the first switching navigation channel signal, there is a certain replacement navigation channel, when the difference making the navigation channel Meteorological Index in this replacement navigation channel deduct the navigation channel Meteorological Index in current driving navigation channel is more than or equal to described navigation channel Meteorological Index threshold value, sending the second switching navigation channel signal; Wherein, described radio data communication equipment is integrated with the mobile communication transceiver interface of the mobile communication transceiver interface of LTE standard, the mobile communication transceiver interface of WiMax standard and HSPA+ standard by fpga chip, and described fpga chip is the Virtex-7 model chip of Xilinx company; Wherein, described navigation channel traffic density is every ships quantity in the sea on navigation channel, and described navigation channel Meteorological Index is the grade that navigation channel weather environment is applicable to ship's navigation, and described navigation channel Meteorological Index comprises 1 to 10, described navigation channel Meteorological Index is higher, the corresponding more applicable ship's navigation in navigation channel.
More specifically, in described navigation channel traffic density and navigation channel Meteorological Index delivery system, described wireless data communication module receives first and switches navigation channel signal or the second switching navigation channel signal, and by wireless data communication network, switch navigation channel signal or second and switch with first the mobile terminal that replacement navigation channel corresponding to navigation channel signal sends to naval vessel managerial personnel.
More specifically, in described navigation channel traffic density and navigation channel Meteorological Index delivery system, the fpga chip of described radio data communication equipment adopts the EP2C5Q208C8N chip of ALTERA company, to replace the Virtex-7 model chip of Xilinx company.
More specifically, in described navigation channel traffic density and navigation channel Meteorological Index delivery system, described positioning equipment, described display device, described memory device and described opertaing device are integrated on one piece of surface-mounted integrated circuit.
More specifically, in described navigation channel traffic density and navigation channel Meteorological Index delivery system, described user input device is keyboard or the touch-screen integrated with described display device.
More specifically, in described navigation channel traffic density and navigation channel Meteorological Index delivery system, described surface-mounted integrated circuit, described user input device, described radio data communication equipment, described ship's speed checkout equipment and described voice playing equipment are all positioned at the front end panel board of pulpit, naval vessel.
More specifically, in described navigation channel traffic density and navigation channel Meteorological Index delivery system, described opertaing device is connected with described radio data communication equipment by RS232 universal serial bus.
Accompanying drawing explanation
Below with reference to accompanying drawing, embodiment of the present invention are described, wherein:
Fig. 1 is the block diagram of navigation channel traffic density and the navigation channel Meteorological Index delivery system illustrated according to an embodiment of the present invention.
Embodiment
Below with reference to accompanying drawings the embodiment of navigation channel of the present invention traffic density and navigation channel Meteorological Index delivery system is described in detail.
In ship running process, the influence of city layout efficiency of navigation in course line, and the traffic conditions in navigation channel and meteorological condition are the important evidence of relation select course.
Vessel traffic refers to the set of indivedual ship motion or the overall of all boats and ships behaviors.Along with the continuous expansion of international trade, traffic is increasingly busy, and impel vessel traffic flow to increase, course line is increased, Channel broadening, changes the distribution in vessel traffic flow field, and the enforcement of traffic separation schemes and traffic administration makes mode of transportation also there occurs change.These changes often cause vessel traffic density to increase, and navigation channel is congested, and traffic hazard takes place frequently.These problems also result in showing great attention to of maritime world.In order to ensure navigation safety, find potential risk early, people need the traffic conditions knowing each navigation channel between starting point and two places, destination in ship running in time, select, evade the navigation channel that the volume of traffic is bigger than normal to make navigation channel.
In order to the description quantized to the traffic conditions in navigation channel, people refer to this parameter of vessel traffic density.So-called vessel traffic density, refers to the ship quantity in certain navigation waters, generally using every nautical mile of ship quantity as criterion.Such as, specify in the competent authority of some country, front and back two ship spacing 1 nautical mile (or interval 6 minutes), namely vessel traffic density the best is 2 to 3 ships (in the sea every).
Meanwhile, the meteorological condition in navigation channel is also the important referential data that deck officer selects navigation channel.Usually, navigator, according to the situation such as wind, stream, wave, mist, ice of each navigating area Various Seasonal, to form the habit course line, on regular route basis by navigating by water practice for a long time, process is summed up and is recommended the course line of navigator by navigation books such as sailing directions, is called recommend route.Climate routing is the one of recommend route, is the course line of summing up out quarterly according to the hydrology, Meteorological Characteristics for many years or monthly recommending.The hydrology, Meteorological Characteristics run into a certain concrete flight number for many years weather, sea situation may have larger difference, and therefore climate routing has very large limitation, can only be as a reference.Along with weather and the development of oceanic forecast and the progress of means of communication a middle or short term, the meteorological route (see meteorological navigation) worked out for a certain concrete flight number replaces climate routing gradually.Such meteorological navigation is generally made by the meteorological administrative authority of locality, and they are for each concrete navigation channel, gives navigation channel Meteorological Index and whether is applicable to ship's navigation to weigh current navigation channel.
The navigation channel traffic density that the present invention proposes and navigation channel Meteorological Index delivery system, can be not smooth at boats and ships current flight, when headway is on the low side, start air route switch mode, the navigation channel traffic density in each bar navigation channel and navigation channel Meteorological Index between two places based on Real-time Obtaining, issue navigation channel the need of the instruction switching, be switched to which bar, be convenient to boats and ships and be switched to the high navigation channel of efficiency of navigation in time, improve the efficiency of navigation of boats and ships.
Fig. 1 is the block diagram of navigation channel traffic density and the navigation channel Meteorological Index delivery system illustrated according to an embodiment of the present invention.
As shown in Figure 1, described delivery system comprises user input device 1, receives the input of user, and arranges navigation channel traffic density threshold value, navigation channel Meteorological Index threshold value according to the input of user and start air route switch speed; Ship's speed checkout equipment 2, detects and exports the current driving speed of boats and ships; Positioning equipment 3, provides multiple replacement navigation channels in boats and ships current driving navigation channel and described current driving navigation channel; Radio data communication equipment 4, connect described positioning equipment 3 to receive described current driving navigation channel and described multiple replacement navigation channel, pass through wireless data communication network, described current driving navigation channel and described multiple replacement navigation channel are sent to the ship-handling center of the current position of boats and ships is gentle resembles administrative authority, to receive the navigation channel traffic density in described current driving navigation channel and described multiple replacement navigation channel from ship-handling center, receive the navigation channel Meteorological Index in described current driving navigation channel and described multiple replacement navigation channel from meteorological administrative authority; Opertaing device 5, connect described radio data communication equipment 4 to obtain the navigation channel traffic density in described current driving navigation channel and described multiple replacement navigation channel, obtain the navigation channel Meteorological Index in described current driving navigation channel and described multiple replacement navigation channel, connect user input device 1 to receive navigation channel traffic density threshold value, navigation channel Meteorological Index threshold value and to start air route switch speed, connect ship's speed checkout equipment 2 to obtain described current driving speed, when described current driving speed is less than or equal to startup air route switch speed, start air route switch mode; Display device 6, connect described opertaing device 5, to show the navigation channel traffic density in described current driving navigation channel and described multiple replacement navigation channel, show the navigation channel Meteorological Index in described current driving navigation channel and described multiple replacement navigation channel, show described current driving speed, and highlighted display and first switches replacement navigation channel corresponding to navigation channel signal or highlighted display and second switches replacement navigation channel corresponding to navigation channel signal; Memory device 7, connects described opertaing device 5, to store the navigation channel traffic density in described current driving navigation channel and described multiple replacement navigation channel, stores the navigation channel Meteorological Index in described current driving navigation channel and described multiple replacement navigation channel; Voice playing equipment 8, connects described opertaing device 5, receives first and switches navigation channel signal or second and switch navigation channel signal, and plays and first switch navigation channel signal or second and switch voice prompted file corresponding to navigation channel signal.
Wherein, in the air route switch mode of opertaing device 5, there is a certain replacement navigation channel, when the difference making the navigation channel traffic density in current driving navigation channel deduct this replacement navigation channel is more than or equal to described navigation channel traffic density threshold value, send the first switching navigation channel signal, there is a certain replacement navigation channel, when the difference making the navigation channel Meteorological Index in this replacement navigation channel deduct the navigation channel Meteorological Index in current driving navigation channel is more than or equal to described navigation channel Meteorological Index threshold value, sending the second switching navigation channel signal; Described radio data communication equipment 4 is integrated with the mobile communication transceiver interface of the mobile communication transceiver interface of LTE standard, the mobile communication transceiver interface of WiMax standard and HSPA+ standard by fpga chip, and described fpga chip is the Virtex-7 model chip of Xilinx company; And, described navigation channel traffic density is every ships quantity in the sea on navigation channel, described navigation channel Meteorological Index is the grade that navigation channel weather environment is applicable to ship's navigation, described navigation channel Meteorological Index comprises 1 to 10, described navigation channel Meteorological Index is higher, the corresponding more applicable ship's navigation in navigation channel, simultaneously, described delivery system also comprises power supply equipment 9, thinks that each equipment in described delivery system provides electric power supply.
Wherein, described wireless data communication module 4 receives the first switching navigation channel signal or second and switches navigation channel signal, and by wireless data communication network, switch navigation channel signal or second and switch with first the mobile terminal that replacement navigation channel corresponding to navigation channel signal sends to naval vessel managerial personnel; The fpga chip of described radio data communication equipment 4 can select the EP2C5Q208C8N chip adopting ALTERA company, to replace the Virtex-7 model chip of Xilinx company; And, can described positioning equipment 3, described display device 6, described memory device 7 and described opertaing device 5 be integrated on one piece of surface-mounted integrated circuit; Described user input device 1 is for electing keyboard or the touch-screen integrated with described display device 6 as; The surface-mounted integrated circuit of integrated described positioning equipment 3, described display device 6, described memory device 7 and described opertaing device 5, described user input device 1, described radio data communication equipment 4, described ship's speed checkout equipment 2 and described voice playing equipment 8 are all positioned at the front end panel board of pulpit, naval vessel; Described opertaing device 5 is connected with described radio data communication equipment 4 by RS232 universal serial bus.
In addition, FPGA (Field-ProgrammableGateArray), i.e. field programmable gate array, he is the product further developed on the basis of the programming devices such as PAL, GAL, CPLD.He occurs as a kind of semi-custom circuit in special IC (ASIC) field, has both solved the deficiency of custom circuit, overcomes again the shortcoming that original programming device gate circuit number is limited.With the circuit design that hardware description language (Verilog or VHDL) completes, can through simple comprehensive and layout, being burned onto fast on FPGA and testing, is the technology main flow of modern IC designs checking.These can be edited element and can be used to realize some basic logic gates (such as AND, OR, XOR, NOT) or more more complex combination function such as demoder or mathematical equation.
Inside most FPGA, in these editable elements, also comprise memory cell such as trigger (Flip-flop) or other more complete block of memory.System designer can be coupled together the logical block of FPGA inside by editable connection as required, just looks like that a breadboard has been placed in a chip.One dispatch from the factory after the logical block of finished product FPGA can change according to deviser with being connected, so FPGA can complete required logic function.FPGA has a lot of advantages such as can finished product fast, can be modified the mistake in correction program and more cheap cost.Manufacturer also may provide the FPGA of cheap still edit capability difference.Because these chips have poor can edit capability, so exploitations of these designs complete on common FPGA, then design is transferred to one and is similar on the chip of ASIC.Another method is with CPLD (ComplexProgrammableLogicDevice, CPLD).
Navigation channel of the present invention traffic density and navigation channel Meteorological Index delivery system, when boats and ships in current navigation channel course line inefficiency, navigation channels and the navigation channel traffic density in current navigation channel and the comparison of navigation channel Meteorological Index is replaced based on other, determine whether to carry out navigation channel switching, and show navigation channel traffic density and the navigation channel Meteorological Index in each navigation channel in time, the important evidence that driver for boats and ships provides navigation channel to select, save the time cost that navigation channel is selected, improve the automaticity that ship's navigation controls.
Be understandable that, although the present invention with preferred embodiment disclose as above, but above-described embodiment and be not used to limit the present invention.For any those of ordinary skill in the art, do not departing under technical solution of the present invention ambit, the technology contents of above-mentioned announcement all can be utilized to make many possible variations and modification to technical solution of the present invention, or be revised as the Equivalent embodiments of equivalent variations.Therefore, every content not departing from technical solution of the present invention, according to technical spirit of the present invention to any simple modification made for any of the above embodiments, equivalent variations and modification, all still belongs in the scope of technical solution of the present invention protection.
Claims (1)
1. a navigation channel traffic density and navigation channel Meteorological Index delivery system, be arranged on boats and ships, it is characterized in that, described delivery system comprises ship's speed checkout equipment, positioning equipment, radio data communication equipment and opertaing device, radio data communication equipment and positioning equipment connect the multiple relevant navigation channel to obtain boats and ships, opertaing device and radio data communication equipment connect navigation channel traffic density and the navigation channel Meteorological Index in the multiple relevant navigation channel to obtain boats and ships, opertaing device is connected the current driving speed to obtain boats and ships with ship's speed checkout equipment, opertaing device is according to the current driving speed of boats and ships, the navigation channel traffic density in the multiple relevant navigation channel of boats and ships and navigation channel Meteorological Index determine whether to send and switch navigation channel signal,
Described delivery system also comprises:
User input device, receives the input of user, and arranges navigation channel traffic density threshold value, navigation channel Meteorological Index threshold value according to the input of user and start air route switch speed;
Ship's speed checkout equipment, detects and exports the current driving speed of boats and ships;
Positioning equipment, provides multiple replacement navigation channels in boats and ships current driving navigation channel and described current driving navigation channel;
Radio data communication equipment, connect described positioning equipment to receive described current driving navigation channel and described multiple replacement navigation channel, pass through wireless data communication network, described current driving navigation channel and described multiple replacement navigation channel are sent to the ship-handling center of the current position of boats and ships is gentle resembles administrative authority, to receive the navigation channel traffic density in described current driving navigation channel and described multiple replacement navigation channel from ship-handling center, receive the navigation channel Meteorological Index in described current driving navigation channel and described multiple replacement navigation channel from meteorological administrative authority;
Opertaing device, connect described radio data communication equipment to obtain the navigation channel traffic density in described current driving navigation channel and described multiple replacement navigation channel, obtain the navigation channel Meteorological Index in described current driving navigation channel and described multiple replacement navigation channel, connect user input device to receive navigation channel traffic density threshold value, navigation channel Meteorological Index threshold value and to start air route switch speed, connect ship's speed checkout equipment to obtain described current driving speed, when described current driving speed is less than or equal to startup air route switch speed, start air route switch mode;
Display device, connect described opertaing device, to show the navigation channel traffic density in described current driving navigation channel and described multiple replacement navigation channel, show the navigation channel Meteorological Index in described current driving navigation channel and described multiple replacement navigation channel, show described current driving speed, and highlighted display and first switches replacement navigation channel corresponding to navigation channel signal or highlighted display and second switches replacement navigation channel corresponding to navigation channel signal;
Memory device, connects described opertaing device, to store the navigation channel traffic density in described current driving navigation channel and described multiple replacement navigation channel, stores the navigation channel Meteorological Index in described current driving navigation channel and described multiple replacement navigation channel;
Voice playing equipment, connects described opertaing device, receives first and switches navigation channel signal or second and switch navigation channel signal, and plays and first switch navigation channel signal or second and switch voice prompted file corresponding to navigation channel signal;
Wherein, in the air route switch mode of opertaing device, there is a certain replacement navigation channel, when the difference making the navigation channel traffic density in current driving navigation channel deduct this replacement navigation channel is more than or equal to described navigation channel traffic density threshold value, send the first switching navigation channel signal, there is a certain replacement navigation channel, when the difference making the navigation channel Meteorological Index in this replacement navigation channel deduct the navigation channel Meteorological Index in current driving navigation channel is more than or equal to described navigation channel Meteorological Index threshold value, sending the second switching navigation channel signal;
Wherein, described radio data communication equipment is integrated with the mobile communication transceiver interface of the mobile communication transceiver interface of LTE standard, the mobile communication transceiver interface of WiMax standard and HSPA+ standard by fpga chip, and described fpga chip is the Virtex-7 model chip of Xilinx company;
Wherein, described navigation channel traffic density is every ships quantity in the sea on navigation channel, and described navigation channel Meteorological Index is the grade that navigation channel weather environment is applicable to ship's navigation, and described navigation channel Meteorological Index comprises 1 to 10, described navigation channel Meteorological Index is higher, the corresponding more applicable ship's navigation in navigation channel;
Described user input device is keyboard or the touch-screen integrated with described display device.
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| CN104599532B (en) * | 2014-07-29 | 2016-01-06 | 海安常大技术转移中心有限公司 | A kind of river channel running method |
| CN106611514A (en) * | 2017-02-13 | 2017-05-03 | 宁波康顿电子科技有限公司 | Ship monitoring communication method and shore-based monitoring system |
| CN106816037A (en) * | 2017-03-02 | 2017-06-09 | 浙江海洋大学 | A kind of navigation channel traffic density and navigation channel Meteorological Index delivery system |
| CN108010389A (en) * | 2017-12-12 | 2018-05-08 | 深圳分云智能科技有限公司 | A kind of marine navigation system based on intelligent wearable device |
| CN113129646B (en) * | 2021-04-16 | 2022-03-25 | 山东交通学院 | Discrete channel traffic information system |
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| JP2008145312A (en) * | 2006-12-12 | 2008-06-26 | Universal Shipbuilding Corp | Optimum route search method |
| CN101783082A (en) * | 2009-08-04 | 2010-07-21 | 上海海事大学 | Monitoring method of river vessel supervisory system based on RFID |
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| CN104103197B (en) | 2016-03-23 |
| CN104599533A (en) | 2015-05-06 |
| CN104103197A (en) | 2014-10-15 |
| CN104464380A (en) | 2015-03-25 |
| CN104464380B (en) | 2015-12-09 |
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