基于ais船舶避碰數(shù)據(jù)采集系統(tǒng)設(shè)計(jì)

1、基于AIS的船舶避碰數(shù)據(jù)采集系統(tǒng)設(shè)計(jì)摘要：船舶自動(dòng)識(shí)別系統(tǒng)(AutomaticIdentificationSystem，簡(jiǎn)稱AIS)工作在海上VHF頻段，運(yùn)用SOTDMA方式發(fā)射船舶數(shù)據(jù)，具有補(bǔ)充現(xiàn)有船舶導(dǎo)航存在的缺陷，減少船舶碰撞事故提高搜救遇險(xiǎn)船舶的速度增強(qiáng)雷達(dá)，船舶交通管理系統(tǒng)VTS的功能。隨著全球經(jīng)濟(jì)的發(fā)展、國(guó)家之間交流的日益頻繁，航運(yùn)業(yè)迎來(lái)了蓬勃發(fā)展的又一次高峰，航海技術(shù)的提高也越來(lái)越受到重視。上個(gè)世紀(jì)，VHF通信技術(shù)被廣泛地

2、應(yīng)用于船舶通信領(lǐng)域。雷達(dá)、ARPA具有識(shí)別船舶的功能但是由于它們自身的局限性而無(wú)法適應(yīng)現(xiàn)代航運(yùn)安全的需求隨著計(jì)算機(jī)技術(shù)、數(shù)字通信技術(shù)以及網(wǎng)絡(luò)信息技術(shù)的飛速發(fā)展，AIS的技術(shù)基礎(chǔ)已經(jīng)形成，在航運(yùn)界對(duì)助航設(shè)各的要求越來(lái)越高的情況下，船舶自動(dòng)識(shí)別系統(tǒng)應(yīng)運(yùn)而生。船舶自動(dòng)識(shí)別系統(tǒng)首先被用于航海避碰。由于雷達(dá)特性的限制，以及不是所有的船都裝備有這個(gè)設(shè)備，因而它首先被用做為一種監(jiān)視與判斷碰撞的危險(xiǎn)度的一種方式。獲得船舶自動(dòng)識(shí)別系統(tǒng)發(fā)送的數(shù)據(jù)對(duì)于船舶避

3、碰非常重要。本文對(duì)AIS基本結(jié)構(gòu)、工作原理、技術(shù)特點(diǎn)、及其輸入輸出接口，輸出信息的幀封裝及解析原理等進(jìn)行了解析。在此基礎(chǔ)上完成了AIS信息采集處理的系統(tǒng)設(shè)計(jì)。試驗(yàn)表明所得到的AIS信息準(zhǔn)確可靠。該項(xiàng)技術(shù)的研究，是AIS信息應(yīng)用系統(tǒng)研究的基礎(chǔ)。關(guān)鍵詞：船舶避碰AISVHFGPS數(shù)據(jù)采集Abstract:AISwksonthemarineVHFusetheSOTDMA(SelfganizedTimeDivisionMultipleAcces

4、s)datachainprotocoltotransferdataofships.TheAIScanhelpthelimitsofthecurrentservicesdecreasethecollidecaseofshipsimprovethevalueofthesafeactioninmarinemakethecontentoftheradartheVTSmestronger.Withthedevelopmentoftheeconom

5、yofinternationalthemecommunicationofthecountriesthenavigationgetsachancetohaveaboomingfuture.Thenavigationtechnologiesarememetobeemphasized.DuringthelastcenturytheVHF(VeryHighFrequency)communicationhasbeenappliedintheshi

6、pstransptationaswellasradarARPAalsocouldidentifyshipsinthemarine.Buttheycouldntadapttotheneedsofthemodernnavigationbecauseoftheirlimits.Therapiddevelopmentofthedigitalcommunicationstechnologycomputertechnologywaretechnol

7、ogysupptstheneededtechnologyofAIS(AutomaticIdentificationSystem).AstheaidingserviceofthenavigationAISisbntolivewillbestrongerstronger.AISisusedinnavigationprimarilyfcollisionavoidance.Duetothelimitationsofradioacteristic

8、sbecausenotallvesselsareequippedwithAISthesystemismeanttobeusedprimarilyasameansoflookouttodetermineriskofcollision。GettheinfmationoftheAisisimptantfcollisionavoidance.Thispaperintroducesthebasestructure、wkprinciple、tech

9、nicalIOptoftheAISalsopresentsAIS’sframeencapsulationfmatdecodingencapsulationmethod.BasedontheabovemethodthesoftwarewasdesignedftheinfmationcollectingprocessingfromAIS.TheexperimentshowedthattheAISinfmationobtainedthroug

10、hcollectingprocessinginthiswaywasaccuratereliable.StudyingonthesetechniquesisthebaseofstudyingtheAISinfmationapplicationsysterm..Keywds:collisionavoidanceAISVHFGPSdataAcquisition4.1嵌入式系統(tǒng)技術(shù)................................

11、...............................................................4.1.1嵌入式系統(tǒng)的組成.................................................................................4.1.2嵌入式操作系統(tǒng)的選擇................................................

12、.........................4.1.3嵌入式系統(tǒng)開(kāi)發(fā)模式.............................................................................4.2基于S3C2410的ARM9硬件開(kāi)發(fā)平臺(tái).........................................................4.3基于S3C2410的ARM9軟件開(kāi)發(fā)流程.

13、........................................................4.4GMSK基帶信號(hào)的解調(diào)設(shè)計(jì)...........................................................................4.4.1GMSK的理論依據(jù)...........................................................

14、......................4.4.2GMSK基帶解調(diào).....................................................................................4.5AIS系統(tǒng)中的同步........................................................................................

15、....4.5.1AIS系統(tǒng)的同步.......................................................................................4.5.2AIS系統(tǒng)的同步技術(shù)分析.......................................................................4.5.3AIS系統(tǒng)的同步設(shè)計(jì).............

16、..................................................................第5章系統(tǒng)軟件設(shè)計(jì)仿真與解碼顯示...............................................................................5.1AIS接收機(jī)的軟件設(shè)計(jì).............................................

17、.......................................5.1.1AIS數(shù)據(jù)的提取及解包...................................................................5.1.2AIS數(shù)據(jù)檢測(cè)、重新打包及輸出...........................................................5.2GMSK基帶信號(hào)的仿真.....

18、..............................................................................5.3AIS的解碼與顯示............................................................................................5.3.1AIS信息的報(bào)文格式.......................

19、........................................................5.3.2AIS信息種類...........................................................................................5.3.3AIS解碼及顯示................................................