CN101339247A - Automatic recognition system and uses of radar in drag-suction dredger - Google Patents

Abstract

The invention discloses an automatic identification system and the application of a radar on a drag-suction dredger, relating to that the information of the automatic identification system, the radar and a planar positioning system is superimposed so as to provide a useful collision prevention measure and the traffic status information for the execution and navigation of the drag-suction dredger. The problem to be solved is to provide a method which can be used for simultaneously observing the automatic identification system of a vessel and the information of the radar in a planar positioning system computer. The technical proposal of the invention integrates the automatic identification system, the radar system and the positioning system into a unit by interface software, and is characterized in that a signal output by a differential GPS is changed into TCP/IP information and input into the computer; the information of a drag arm sensor is input into the computer by an ADAM5000TCP module; the information of the automatic identification system is changed from a 485/422 signal output by a shipborne transceiver into a 232 signal and input into the computer; the radar information is input into the computer by a radar card. The automatic identification system disclosed by the invention is used for the drag-suction dredger.

Description

The utilization in trailing suction hopper dredger of automatic recognition system and radar

Technical field:

The present invention relates to by ship automatic identification system, radar and plane positioning system information are superposeed, for the method for effective collision prevention measure and traffic state information is provided in trailing suction hopper dredger construction, the navigation.

Background technology

Trailing suction hopper dredger is as engineering ship, its plane positioning system is different with general ship's fix system requirements, the positioning system of general boats and ships only requires the rough location of hull, and the positioning system positioning requirements of trailing suction hopper dredger is higher, precision is generally about 1 meter, and will navigate to drag head, therefore the information that also need gather corresponding sensor, and the project data in the work progress read in and handle, be used for guiding construction.

Ship automatic identification system (AIS) can provide information such as identification sign, Ship Types, tonnage, loading situation, course line, port of destination, Estimated Time of Arrival, current accommodation and speed.The purposes of automatic recognition system is to strengthen the ability of ship-to-ship collision prevention, promotes navigation safety.

The marine radar effect is an information of catching and discern other boats and ships of periphery and object.

The positioning software of current trailing suction hopper dredger is the software of networking, and locating information, AIS information and radar information be in transmission over networks, and computing machine utilizes network to obtain above information and is presented at separately on the screen.But, above-mentioned three systems are separate, there is shortcoming separately in three systems, plane positioning system can only be used for guiding construction, automatic recognition system is for the object (sea wall of boats and ships that AIS is not installed or non-boats and ships, wave) powerless, and radar can not effectively be distinguished the identity of boats and ships, character, the intention of current operation, can not find sea wall or port structure concealed target behind, and when two ships appear on the same orientation not far from one another, especially in night flight, the mist boat, under the various visibility harsh conditions such as storm, often produce on the radar screen and obscure.The work place of trailing suction hopper dredger generally is navigation channel, coastal waters or harbor district, this regional boats and ships quantity is many, the boats and ships DYNAMIC COMPLEX, the boats and ships that AIS is not installed also can often occur, the boats and ships construction is not just driven in the driver's of trailing suction hopper dredger work, simultaneously also to keep a close eye on safety of ship, under such construction environment, driver for trailing suction hopper dredger, workload is very big, need observe the content of 3 systems (3 screens) simultaneously, be unfavorable for that the trailing suction hopper dredger driver pays close attention to simultaneously and 3 systems are separate.Therefore, make the driver accurately observing the information of other boats and ships and the information that radar shows in the construction, for alleviating the trailing suction hopper dredger work load for drivers, ensureing that navigation safety has very strong Practical significance.

Summary of the invention

The problem that the present invention need solve provides a kind of method that can observe ship automatic identification system, radar information in the plane positioning system computing machine simultaneously.

Technical scheme of the present invention is that ship automatic identification system, radar system and former location system are integrated by interface software, the RS232 conversion of signals that it is characterized in that differential GPS output is that tcp/ip message inserts computing machine, rake arm sensor information inserts computing machine by the ADAM5000TCP module, the information of ship automatic identification system becomes 232 signals to insert computing machine from 485/422 conversion of signals of boat-carrying transceiver output, computer-internal installs radar display process card additional, by radar display process card radar signal is inserted computing machine.

The present invention is because with ship automatic identification system, radar system, the information of positioning system all inserts the positioning system computing machine, and the information of carrying out stack, the content of 3 computer screens is shown in a screen, when keeping the primary plane position system function, expand the deixis of ship-to-ship collision prevention and the ability of demonstration other boats and ships of periphery and object information, two screens have not only been saved, and make the driver accurately can observe the information of other boats and ships and the information that radar shows in the construction, ensure trailing suction hopper dredger construction and navigation safety, alleviate the trailing suction hopper dredger work load for drivers.

Embodiment

The bearing accuracy that the trailing suction hopper dredger positioning system requires is than higher, coordinate system in the construction area is an engineering coordinate system, construction work information comprises following information: the engineering coordinate in the engineering coordinate of construction area, the tracker wire of work progress, mud dumping area territory, navigation channel line, floating drum engineering coordinate, above information is input in the computing machine by the engineering staff.

The output characteristics of GPS equipment is that RS232 includes the WGS-84 latitude and longitude information, RS232 information by the RS232/TCP gateway after output signal be converted to tcp/ip message; By the construction conversion parameter WGS-84 latitude and longitude information is converted to the engineering coordinate information.

Compass information directly inserts in the RS232/TCP module and is converted to tcp/ip message, and compass information is as the direction signal of trailing suction hopper dredger location.

Because trailing suction hopper dredger requires to be positioned on the drag head, therefore need to receive drag head information.The drag head information source in last rake pipe vertical reference, down rake pipe vertical reference, go up rake pipe horizon sensor, rake pipe horizon sensor down.The related sensor information of rake arm indication is inserted ADAM5000TCP module (Taiwan is ground magnificent company and produced), and computing machine uses ICP/IP protocol to receive related sensor information, and the location is extended to drag head.

In the system of networking, server receives all information and calculates the corresponding engineering coordinate position, and all locating information are issued on network, and each workstation receives on the screen that is presented at after the information separately.

The ship automatic identification system signal directly can be inserted computing machine, perhaps insert the TCP/RS232 gateway and insert computing machine by LAN (Local Area Network) and ICP/IP protocol, each computing machine is decoded to AIS information, and the content (comprising boats and ships static information and multidate information) of decoding is presented on the dredging positioning software.The static information of AIS mainly comprises: MMSI numbering, IMO number, call name, name of vessel, Ship Types, reference point A, reference point B, reference point C, reference point D, plan in-position, draft; The multidate information of AIS mainly comprises: operational configuration, steering rate, speed on the ground, GPS east longitude coordinate, GPS north latitude coordinate, bearing accuracy, course over ground, true heading.Because the requirement of trailing suction hopper dredger construction precision, different with general watercraft AIS demonstration is that trailing suction hopper dredger must be converted to the WGS84 longitude and latitude construction work coordinate, therefore needs the synchronous WGS84 latitude and longitude information with among the AIS be converted to the construction work coordinate information with the construction work coordinate transformation parameter; After server receives AIS base station information releasing, transmit to all workstations that need immediately, after this moment, all workstations that are connected with server received information, AIS information is presented on the screen.

Mainly there is problem aspect two in AIS in transmission over networks: the excessive and quantity of information on-fixed size of quantity of information (information that may 10 ships also has the information of 200 ships), therefore can't adopt the mode of request for data/feedback data of principal and subordinate.The information flow-rate of AIS is big (baud rate 38400bps) very, unconfined Network Transmission may will cause network blockage, need on workstation, limit, generally only allow 4 workstation visit AIS packets aboard ship, software carries out intellectuality and judges, priority to all working station is provided with, after server has connected 4 workstations, when having the high workstation of priority to visit, server will disconnect with the low workstation of priority between be connected and being connected of the high intercomputer of foundation and priority; Be similarly and reduce the flow of AIS information on network, the decode procedure of AIS information is finished by decoder module on each workstation, and promptly server only transmits raw information.

For AIS information on-fixed size issue, for reducing the workload that each workstation shows and handles, according to the trailing suction hopper dredger characteristic of construction operation among a small circle, system is according to 30 nautical miles of covering scopes farthest, and the condition that possesses 200 ships at most shows AIS information at computer screen.If receive the AIS information that surpasses 200 ships, then the AIS information of this ship of screening range farthest ship from the AIS base station.Because boats and ships may sail out of the local zone, lost information 20 minutes after (can be provided with) at certain bar ship, the AIS information of this ship is with deleted.

The positioning system computing machine installs the radar card additional, and the radar card directly inserts in the PCI slot of computing machine, and by the drive software of radar card, radar signal is linked into computing machine; Because radar information is the screen color lattice information, its quantity of information is very big, and general radar screen is the 1280*1024 size, the information of each point is true color, be 3 bytes, its untreated quantity of information is about the 3M byte, has very big difficulty undoubtedly on demonstration and Network Transmission.Because the quantity of information of radar is very big, handle by vectorized process and Information Compression, can greatly reduce the network information transfer amount, the radar screen message that disposes can be by Network Transmission to other computing machines, and other computing machine decompress(ion)s also are presented on the screen.Radar information is carried out vectorized process, use the area flag point to note close color and adjacent areas point, and be terrestrial coordinate, make the radar screen graph become the vector quantization figure information translation.This processing can make quantity of information reduce greatly, and the information on common radar screen can be reduced to about the 100K byte, makes information transmission and demonstration become possibility.Use data compression technique, more Information Compression can be arrived about the 20K byte by LZ algorithm coding compress mode.

The quantity of information of AIS is very large, the information of every ship is near the quantity of information of 1k byte, if 200 ships are arranged in the zone, and adopt per 3 seconds records mode once, the data of each hour will reach the quantity of information of 240M byte so, adopt common recording mode will cause quantity of information too huge undoubtedly, when data readback, the file that reads in is too big.

Adopt software records near the information of 10 ships of this ship, and with the Information Compression of these 10 ships, the amount of compression back information is about 3k, writes down a secondary data 3 seconds, then the data of the 3.6M byte of each hour are more fast for reading of data storage and data file.

In the trailing suction hopper dredger work progress, the general situation on every side of only paying close attention to, under the bigger situation of radar scanning scope (for example 3 nautical miles), in fact the driver pays close attention to is 1 nautical mile information on every side, so software can be provided with 1 nautical mile information filtering is in addition fallen, on network, do not issue, to reduce quantity of information.

Under many circumstances, radar return may produce considerable glitch, generally speaking, uses a certain color to show glitch on the radarscope, and can eliminate this glitch this moment by the method for color filtration.

Because AIS and the quantity of information of radar on screen are bigger, software adopts a kind of graphic presentation algorithm, AIS boats and ships and radar information outside screen do not show that the area of radar vector figure on screen do not show the speed that can accelerate screen display less than the polar plot of 4 pixels.

According to the method described above, positioning system can obtain all locating information: AIS, DGPS, compass, tidal level information, rake arm attitude information, radar information from the network acquisition or from computer port, these information are carried out overlap-add procedure, all information of providing of viewing hardware system simultaneously, and in transmission over networks.

Claims (2)

1, the utilization in trailing suction hopper dredger of automatic recognition system and radar, with ship automatic identification system, radar system and former location system are integrated by interface software, the RS232 conversion of signals that it is characterized in that differential GPS output is that tcp/ip message inserts computing machine, rake arm sensor information inserts computing machine by the ADAM5000TCP module, the information of ship automatic identification system becomes 232 signals to insert computing machine from 485/422 conversion of signals of boat-carrying transceiver output, computer-internal installs radar display process card additional, by radar display process card radar signal is inserted computing machine.

2, automatic recognition system according to claim 1 and the radar utilization in trailing suction hopper dredger is characterized in that the information of automatic recognition system, radar and primary plane location shows in transmission over networks and stack by TCP/IP.