基于北斗导航系统并兼容GPS的渔船寻迹仪电路设计

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针对传统渔船跟踪仪在定向和跟踪过程中经常出现跟踪慢和不容易锁定等缺陷，提出一种用于跟踪渔船行进位置轨迹仪的电路设计与实现方法。它应用国产北斗卫星导航系统，同时兼容GPS和GSM／GPRS核心技术，实现对出海渔船的寻迹和跟踪。得到的寻迹仪具有寻迹速度快和跟踪准确的特性。结果显示，寻迹仪的定位精度可达5m，重捕获时间小于0．8S，当电路供电电压低于设定值或渔船航速超过设定值时，寻迹仪会自动发出报警信号。

In the process of the traditional fishing vessels tracing instrument positioning and tracking, it often appears defect such as tracking slow and not being easy to lock etc. , this paper puts forward the circuit design and implementation for tracking fishing traveling position trajectory instrument, it applies of domestic Beidou satellite navigation system, and is compatible with both GPS and GSM/GPRS core technology, to realize tracing and tracking of sea fishing vessels. It has the characteristics of tracing fast and tracking accurate. The results show that the positioning accuracy of tracing instrument can reach 5 m, the reacquisition time is less than 0.8 s, when the circuit power supply voltage is below 3.9 V or fishing boat speed is ...