Rapid GPS (global position system) positioning method for AIS (automatic identification system) net sounder
A technology of GPS positioning and network position meter, which is applied in the field of GPS positioning to achieve the effect of extending time and reducing power consumption
Active Publication Date: 2015-01-07
TIANJIN 712 COMM & BROADCASTING CO LTD
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At present, there are no reports of related methods in the literature at home and abroad.
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[0029] specific implementation plan
[0030] The present invention is further described below in conjunction with accompanying drawing:
[0031] like figure 1 As shown, the unit block diagram of the AIS network position instrument is composed of the main controller of the AIS network position instrument, the GPS positioning module, the AIS transmitter circuit, the power control circuit and the battery power supply circuit. The main controller of the AIS network position instrument is Cortex-M3 from ST Company The 32-bit ARM chip of the core STM32F103RCT6 is responsible for controlling the work of each unit of the AIS network position indicator and generating the AIS protocol; the GPS positioning module uses the NEO-6M module of Ublox Company, which is responsible for receiving GPS satellite signals and calculating and analyzing the current position information; the AIS transmitter The circuit is responsible for adjusting the message sent by the main controller of the AIS netw...
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The invention relates to a rapid GPS positioning method for an AIS net sounder. The method comprises firstly, starting the AIS net sounder; secondly, querying whether a GPS positioning module obtains successful positioning; thirdly, waiting for the GPS positioning module to download satellite ephemeris files through a GPS antenna; fourthly, querying the positioning state of the GPS positioning module; and fifthly, if the GPS positioning module positions normally, determining that the satellite ephemeris files are downloaded successfully, enabling the GPS positioning module to complete the downloading of the satellite ephemeris files in five minutes, and turning off the main power supply of the GPS positioning module five minutes later but not turning off the backup power supply of the GPS positioning module to guarantee no loss of the satellite ephemeris data inside the GPS positioning module. The rapid GPS positioning method for the AIS net sounder has the advantages that by controlling the turn-on and turn-off time of the GPS positioning module, the positioning time of the net sounder at every time can be shortened from 40 seconds to 2 seconds; and by discriminating the conditions of signal blocking and ephemeris abnormality of the GPS positioning module, the power consumption under abnormal conditions can be reduced, and accordingly the AIS net sounder can work continuously for up to 20 days after a single charge, which doubles the original usage time.
Description
technical field [0001] The invention relates to a GPS positioning method, in particular to a fast GPS positioning method for an AIS network position meter. Background technique [0002] At present, the AIS network position meter is gradually being widely used in the fishery system, providing fishermen with convenient information-based fishing net monitoring methods, and improving fishing efficiency. However, the current AIS network position meter can only work for about 7 to 10 days after a single charge. , can not fully meet the requirements of fishermen, fishermen expect AIS net position meter can work for more than 15 days. In response to this requirement, some manufacturers have increased the battery capacity or the number of batteries, which not only increases the cost of the AIS network position meter, but also makes the installation and use of the AIS network position meter troublesome, and fishermen are very dissatisfied. [0003] By analyzing the existing AIS netwo...
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IPC IPC(8): G01S19/42G01S19/34
Inventor 程树军王心一鹿强张相波刘贞社杨雷
Owner TIANJIN 712 COMM & BROADCASTING CO LTD