虚拟仪器在罗兰C导航仪检测中的应用

Application of Virtual Instruments in Test of Loran-C Navigation Device

基于虚拟仪器技术的罗兰C导航仪检测硬件包括计算机、USB接口及其干扰抑制、单片机、信号发送接收、被测设备等。USB接口与单片机的数据采用异步传输。由罗兰C信号模拟器向罗兰C导航仪发送所需信号,通过改变前端信号发送、接收单元的信号激励及响应形式,以判断该设备工作状态及性能指标。

The Loran-C testing system based on the virtual instruments includes computer unit, USB interface unit and interference restraining unit, SCM unit and sending and receiving signal unit. Data between the USB and SCM is transmitted by asynchronous means. The needed signal was sent to the Loran-C navigation device with Loran-C signal simulator, the working state and index of the device was judged through changed sending signal of front end, signal inspiriting and response means of signal receiving unit.