帧头 |
UTC时间 |
状态 |
纬度 |
北纬/南纬 |
经度 |
东经/西经 |
速度 |
$GPRMC |
hhmmss.sss |
A/V |
ddmm.mmmm |
N/S |
dddmm.mmmm |
E/W |
节 |
方位角 |
UTC日期 |
磁偏角 |
磁偏角方向 |
模式 |
校验 |
回车换行 |
度 |
ddmmyy |
000 - 180 |
E/W |
A/D/E/N |
*hh |
CR+LF |
格 式: $GPRMC,<1>,<2>,<3>,<4>,<5>,<6>,<7>,<8>,<9>,<10>,<11>,<12>*hh<CR><LF>
$GPRMC,024813.640,A,3158.4608,N,11848.3737,E,10.05,324.27,150706,,,A*50
说 明:
字段 0:$GPRMC,语句ID,表明该语句为Recommended Minimum Specific GPS/TRANSIT Data(RMC)推荐最小定位信息
字段 1:UTC时间,hhmmss.sss格式
字段 2:状态,A=定位,V=未定位
字段 3:纬度ddmm.mmmm,度分格式(前导位数不足则补0)
字段 4:纬度N(北纬)或S(南纬)
字段 5:经度dddmm.mmmm,度分格式(前导位数不足则补0)
字段 6:经度E(东经)或W(西经)
字段 7:速度,节,Knots(一节也是1.852千米/小时)
字段 8:方位角,度(二维方向指向,相当于二维罗盘)
字段 9:UTC日期,DDMMYY格式
字段10:磁偏角,(000 - 180)度(前导位数不足则补0)
字段11:磁偏角方向,E=东,W=西
字段12:模式,A=自动,D=差分,E=估测,N=数据无效(3.0协议内容)
字段13:校验值
/// <summary> /// GPS信息 /// </summary> public class GPSInfo { public string Longitude;//经度 public string Latitude; //纬度 public string Speed; //速度 public string GPSStatus;//GPS状态 A=数据有效;V=数据无效 public string GPSTime;//GPS时间 public string GPSHeading;//航向 } /// <summary> /// GPS/BD定位信息解析 /// </summary> public static class GPSAnalysisClass { /// <summary> /// 打开串口 /// </summary> /// <param name="_SerialPort">SerialPort</param> /// <param name="_PortName">PortName</param> /// <param name="_BaudRate">BaudRate</param> /// <returns></returns> public static bool OpenSerialPort(SerialPort _SerialPort, string _PortName, int _BaudRate) { bool Ret = false; try { _SerialPort.Close(); _SerialPort.PortName = _PortName; _SerialPort.BaudRate = _BaudRate; _SerialPort.NewLine = Environment.NewLine; _SerialPort.Open(); if (_SerialPort.IsOpen) Ret = true; } catch (Exception ex) { Console.WriteLine(ex.Message); Ret = false; } return Ret; } /// <summary> /// GNRMC解析[北斗] /// </summary> /// <param name="_RecString">原始字符串</param> /// <returns>北斗定位信息</returns> public static GPSInfo GNRMCAnalysis(string _RecString) { GPSInfo gpsInfo = null; string[] strtemp = _RecString.Split(' '); for (int i = 0; i < strtemp.Length; i++) { string[] strtemp1 = strtemp[i].Split(','); if (strtemp1.Length >= 12) { if (strtemp1[0] == "$GNRMC") { gpsInfo = new GPSInfo(); gpsInfo.GPSStatus = strtemp1[2]; gpsInfo.GPSHeading = strtemp1[8]; gpsInfo.Speed = strtemp1[7] == "" ? "" : Convert.ToDouble(Convert.ToDouble(strtemp1[7]) * 1.852).ToString("0.0"); gpsInfo.Latitude = strtemp1[3] == "" ? "" : GPSTransforming(strtemp1[3]).ToString("0.000000"); gpsInfo.Longitude = strtemp1[5] == "" ? "" : GPSTransforming(strtemp1[5]).ToString("0.000000"); gpsInfo.GPSTime = strtemp1[9] == "" ? "" : "20" + strtemp1[9].Substring(4, 2) + "-" + strtemp1[9].Substring(2, 2) + "-" + strtemp1[9].Substring(0, 2) + " " + strtemp1[1].Substring(0, 2) + ":" + strtemp1[1].Substring(2, 2) + ":" + strtemp1[1].Substring(4, 2); } } } return gpsInfo; } /// <summary> /// GPRM字符串解析[GPS] /// </summary> /// <param name="_RecString">原始字符串</param> /// <returns>GPS定位信息</returns> public static GPSInfo GPRMCAnalysis(string _RecString) { GPSInfo gpsInfo = null; if (!string.IsNullOrEmpty(_RecString)) { _RecString = _RecString.Contains(" ") ? _RecString.Substring(0, _RecString.IndexOf(" ")) : _RecString; string[] seg = _RecString.Split(','); if (seg.Length >= 12) { gpsInfo = new GPSInfo(); gpsInfo.GPSStatus = seg[2];//状态 gpsInfo.GPSHeading = seg[8];//角度 gpsInfo.Speed = seg[7] == "" ? "" : (Convert.ToDouble(seg[7]) * 1.852).ToString("0.0");//速度 gpsInfo.Latitude = seg[4] == "" ? "" : GPSTransforming(seg[3]).ToString("0.000000"); gpsInfo.Longitude = seg[6] == "" ? "" : GPSTransforming(seg[5]).ToString("0.000000"); ; gpsInfo.GPSTime = seg[9] == "" ? "" : string.Format("20{0}-{1}-{2} {3}:{4}:{5}", seg[9].Substring(4), seg[9].Substring(2, 2), seg[9].Substring(0, 2), seg[1].Substring(0, 2), seg[1].Substring(2, 2), seg[1].Substring(4)); } } return gpsInfo; } /// <summary> /// 降度分秒格式经纬度转换为小数经纬度 /// </summary> /// <param name="_Value">度分秒经纬度</param> /// <returns>小数经纬度</returns> private static double GPSTransforming(string _Value) { double Ret = 0.0; string[] TempStr = _Value.Split('.'); string x = TempStr[0].Substring(0, TempStr[0].Length - 2); string y = TempStr[0].Substring(TempStr[0].Length - 2, 2); string z = TempStr[1].Substring(0, 4); Ret = Convert.ToDouble(x) + Convert.ToDouble(y) / 60 + Convert.ToDouble(z) / 600000; return Ret; } }