船用通導(dǎo)設(shè)備程序解析方法

由于硬件上沒有時(shí)鐘電路，所以JSON格式中不加入日期和時(shí)間了，不必提取GPS數(shù)據(jù)中的時(shí)間。需要連接的設(shè)備包括：GPS、羅經(jīng)、測(cè)深儀、計(jì)程儀、氣象儀（風(fēng)速風(fēng)向儀）雷達(dá)、北斗（協(xié)議未知）GPS數(shù)據(jù)提取。有些設(shè)備發(fā)出的0183數(shù)據(jù)可能和其它設(shè)備有些差別，比如：發(fā)出的長(zhǎng)度不一樣，在標(biāo)準(zhǔn)數(shù)據(jù)后面可能增加了數(shù)據(jù)，所以判斷0183數(shù)據(jù)時(shí)要先校驗(yàn)整條數(shù)據(jù)是否合法，然后從指定域提取數(shù)據(jù)。不同設(shè)備發(fā)出的同樣0183數(shù)據(jù)中，指定域的字節(jié)長(zhǎng)度是否完全一樣還未知，需要注意。提取經(jīng)緯度：$--GGA,v1>,v2>,v3>,v4>,v5>,v6>,v7>,v8>,v9>,M,v10>,M,v11>,v12>*hh<CRxLF><1>UTC時(shí)間，hhmmss（時(shí)分秒）格式<2>緯度ddmm.mmmm（度分）格式（前面的0也將被傳輸）<3>緯度半球N（北半球）或S（南半球）<4>經(jīng)度dddmm.mmmm（度分）格式（前面的0也將被傳輸）<5>經(jīng)度半球E（東經(jīng)）或W（西經(jīng)）<6>GPS狀態(tài)：0=未定位，仁非差分定位，2=差分定位，6=正在估算<7>正在使用解算位置的衛(wèi)星數(shù)量（00?12）（前面的0也將被傳輸）<8>HDOP水平精度因子（0.5?99.9）<9>海拔高度（-9999.9?99999.9）<10>地球橢球面相對(duì)大地水準(zhǔn)面的高度<11>差分時(shí)間（從最近一次接收到差分信號(hào)開始的秒數(shù)，如果不是差分定位將為空）<12>差分站ID號(hào)0000?1023（前面的0也將被傳輸，如果不是差分定位將為空）例：$GPGGA,051205.0,3003.6001,N,12003.7875,E,1,17,0.6,19.7,M,7.0,M,,*5D

需要提取的內(nèi)容：位置在的JSON中的name名稱說明21111002緯度重占-=-/\xx41111001經(jīng)度重占-=-/\xx61111006GPS狀態(tài)71111005衛(wèi)星數(shù)量"type":"11", 〃動(dòng)態(tài)信息"src":"1101", //GPS數(shù)據(jù)"data":[{"name":"1111001",〃經(jīng)度"value":"118.1234" 〃東經(jīng)118.1234度},{"name":"1111002",〃維度"value":"29.5678" 〃北緯29.5678度}]提取航速(來源于GPS)$--VTG,x.x,T,x.x,M,x.x,N,x.x,K*hh(對(duì)地航跡補(bǔ)償和對(duì)地速度)TrackDegrees軌跡度數(shù)T=True真實(shí)TrackDegrees軌跡度數(shù)M=Magnetic磁羅經(jīng)SpeedKnots速度節(jié)N=Knots速度單位

SpeedKilometersPerHour速度千米每小時(shí)K=KilometresPerHour速度單位ChecksumTheNMEA0183Protocol17$GNVTG,234.4,T,239.7,M,0.0,N,0.1,K,A*32(5是速度N是knots也就是節(jié)，7是速度K是千米每小時(shí))11111004以真北為參考的航向，單位度，重點(diǎn)51111003對(duì)地航速，單位節(jié)，重點(diǎn)電羅經(jīng)$--HDT,x.x,T*hh方向角RateOfTurn,degreesperminute,"-"meansbowturnstoportStatus,AmeansdataisvalidChecksum例：$HEHDT,321.2,T*2D位置在的JSON中的name名稱11111007船艏向（重點(diǎn)）例(現(xiàn)場(chǎng)船舶提取)：{"type":"11","src":"1401","data":[{"name":"1111007","value":"29"}]}

測(cè)深儀數(shù)據(jù)提取$--DPT,x.x,x.x*hhDepth,metersOffsetfromtransducer;positivemeansdistaneefromtransducertowaterline,negativemeansdistaneefromtransducertokeelChecksumDPT--深度信息語句格式(注意：同樣的DPT語句，不同的設(shè)備發(fā)出來的長(zhǎng)度可能不一樣)$--DPT,x.x,x.x,x.x*hh<CRxLF>(1)海底深度，米，m⑵吃水深度，米，m當(dāng)前使用量程，米，m校驗(yàn)值例：$SDDPT,008.7,00.0,020*76位置在的JSON中的name名稱11111010深度米21111011正數(shù)代表到水線距離，負(fù)數(shù)代表到龍骨距離例：{"type":"11","src":"1501","data":[{"name":"1111010","value":"2.1"},{"name":"1111011","value":"0.0000"}]}風(fēng)速風(fēng)向儀（也叫氣象儀）數(shù)據(jù)提取$WIMWV,v1>,v2>,v3>,v4>,<5>*hhvCRxLF><1>Windangle,0.0to359.9degrees,inrelationtothevessel'sbow/centerline,tothenearest0.1degree.Ifthedataforthisfieldisnotvalid,thefieldwillbeblank.風(fēng)向<2>Referenee:參考，R相對(duì)風(fēng)，T理論風(fēng)R=Relative(apparentwind,asfeltwhenstandingonthemovingship)T=Theoretical(calculatedactualwind,asthoughthevesselwerestationary)<3>Windspeed,tothenearesttenthofaunit.Ifthedataforthisfieldisnotvalid,thefieldwillbeblank風(fēng)速<4>Windspeedunits:風(fēng)速單位K=km/hr千米/小時(shí)M=m/s米/秒N=Knots節(jié)(海里/小時(shí))S=statutemiles/hr/英里/小時(shí)<5>Status:A=datavalid;V=datainvalid例：$WIMWV,74,R,0.4,M,A*09位置在JSON中的name名稱11317001風(fēng)向21317002參考31317003風(fēng)速（單位換算成米/秒）

{"type":"13", 〃氣象信息"src":"1701", 〃氣象儀"data":[{"name":"1317001", 〃溫度"value":"23.1" //23.1攝氏度},{"name":"1317002", 〃風(fēng)向"value":"32" 〃北偏東32度},{"name":"1317003", 〃風(fēng)速"value":"3" //3米/秒}]},{"type":"13","src":"1701","data":[{"name":"1317001","value":"0.000"},{"name":"1317002","value":"T"},{"name":"1317003","value":"0.0"}]}TTMTrackedTargetMessage$--TTM,xx,x.x,x.x,a,x.x,x.x,a,x.x,x.x,a,c--c,a,a*hhTargetNumberTargetDistanceBearingfromownshipBearingUnitsTargetspeedTargetCourseCourseUnitsDistanceofclosest-point-of-approachTimeuntilclosest-point-of-approach"-"meansincreasing"-"meansincreasingTargetnameTargetStatusReferenceTargetChecksumIdenlilier02-01.41061tNT-Tracking vTargetBeariji?aAAurtomaticDistaric*toCPARM^rRadarTarcie?TiSivcfri0.TargetNameTargetCourseioc:二1磁1:01:05 ；UTGTimeIILinkiargettoGPSorMSTargdLatitudeTar^^e[Long：ih.jde010'02.64024"ET/RT“2C-:TjRTgiDistance1丫 管|616.36:UrTbe憂iCPA-3B336.B7?]QisReferertceT^i6<]2.21:OwnVeMeld應(yīng)怙(forcalcultftinflCPA)li'OPortMonilorRadarl-on 5RATTHpi01r￡1￡.3€r7S.7^Tp2.0p10.0rTf602.21p^393S￡?37fHpAEK：PTfrQ1DG5€.26^*5￡Rnd&rlraCOM4：smLL,01r0201?40951j01002+?49<M,JtBCa010051<23>7rifeSFRad&rlonC0M4=CRMTMP01r61f 7,T,2.0P10.0pT,602.21p-35386.544JPABCPTf,010057.23BA*57RadailonCCH4:=RMLL,C1,0201.410d€PN,01002.￡iH,E,01010<.67PI,h€1KMtaFlgCOMS5RMTMrGlr61€K36^?*7>T,2-01ilG-QPTfma2LP-3B3g€,7XRPABC/T,,010104. 56Radiarl&J1CCH4：CRftTLLBC1B02QL.41061,^?1002.€<&24rE?JSCB010105.67FIB