北斗/GPS混合定位模块UM220应用研究

Application research of UM220 Beidou/GPS hybrid position module

为了进行北斗/GPS混合定位、USB接口供电、串口转USB接口、卫星数据采集与提取等方面研究的目的,基于北斗/GPS绝对定位原理,采用和芯星通公司开发的UM220北斗/GPS混合定位模块,并借助AMS1117芯片、CH340G芯片等元件,设计了LVTTL电平串口转USB口电路、DC/DC电路、天线供电电路,基于NEMA-0183通信协议,在Microsoft Visual C++环境下开发了基于MSComm控件的通信程序、数据显示控制程序、数据提取程序,模块与计算机连接并上电后,通过界面操作,实现了北斗/GPS对模块电路的混合定位、USB接口的供电与通信、定位数据的提取与显示,完成了UM220北斗/GPS混合定位模块的应用研究。

The purpose of this paper is to study Beidou/GPS hybrid position, USB interface supplying power, serial port converted to USB interface, collecting and extracting satellite data etc. Based on Beidou/GPS absolute positioning principle, using UM220 Beid ou/GPS hybrid position module of UNICORECOMM company, AMSlll7 and CH340G, the circuit used to convert LVTTL level serial port to USB interface, DC/DC; circuit, the circuit supplying power for antenna are designed. With the help of NEMA 0183 communication protocol, communication program, displaying and controlling data program, extracting data program are developed under MSComm control in the Microsoft Visual C＋＋. After computer connects to module and powers on, operating interface soft- ware realizes Beidou/GPS hybrid position on module circuit, supplying power and communicating through USB interface, extracting and displaying positioning data. Then the Application Research of UM220 Beidou/GPS hybrid position module is completed.