基于VRS网络的亚米级差分GPS接收机的设计

Design of Decimeter DGPS Receiver Based on VRS NET

现在市场上亚米级差分GPS接收机设备昂贵,提出了基于VRS网络采用低成本GPS-OEM板设计亚米级的差分GPS接收机;首先介绍VRS系统的工作原理,应用VRS网络改正GPS的轨道误差、电离层、对流层和大气折射引起的误差,将高精度的差分信息通过GPRS发给移动站来提高接收机的定位精度;其次论证了差分GPS的定位原理;最后提出整个系统的方案设计,采用NovA-tel Superstar的OEM板处理GPS天线接收的卫星信息,同时对GPRS天线接收VRS网络的数据中心差分信息进行差分运算;单片机控制软件采用汇编语言和C语言来编写;系统的实验结果表明差分GPS接收机应用效果好,定位精度高,最重要的是降低了产品的成本。

Existing Decimeter DGPS receiver is expensive in market now. A novel decimeter GPS receiver is designed based on VRS NET by using cheap GPS-OEM board. Firstly DGPS positioning principle is explained, application of VRS NET corrects GPS orbit error and ionosphere, troposphere, atmosphere, refraction error, high positioning precision difference information is transmitted by GPRS to mobile machine in order to improve receiving machine positioning preeision; secondly, DGPS positioning principle is illustrated; finally, the whole system scheme design is bought forward, OEM board of using NovAtel Superstar deals with secondary planet information of GPS antenna receiving, and using data center difference information of GPRS antenna receiving VRS NET difference compute . Using compilation language and C language compiles Mieroeontroller software. It is proved by experiment that DGPS receiving machine has good application outcome and high positioning precision, most important reduces production cost.