虚拟仪器在天气雷达接收机测试中的应用

目前天气雷达测试和日常维护主要依赖于传统台式仪器，其功能单一、不便携带等局限性极大制约雷达故障诊断和修复，给气象服务带来严重影响。通过对接收机原理和性能参数进行分析，介绍了虚拟仪器的硬件结构和软件特点，并以中频带宽测试为例，详细介绍了虚拟仪器测试系统的设计思路、工作原理和操作方法。由于采用便携式PXI模块化仪器为硬件基础，以软件编程为核心，虚拟仪器体积小、重量轻、便于携带，克服了传统仪器的不足，具有良好的环境适应能力和功能扩展优势，特别适用于雷达台站进行现场测试。

Application of Virtual Instruments in Weather Radar Receiver Testing

At present, the test and maintenance of weather radar mainly rely on traditional desktop instruments. Its limited functions and poor mobility restrict the diagnoses and repair of radar malfunctions, and induce a baneful influence to meteorological service. The principles and function parameters of radar receivers are analyzed. The hardware framework and software characteristics of the virtual instruments are introduced. Taking the IF band width testing as an example, the design ideas, work principles, and operating methods of the virtual instruments system are discussed. With the advantages of using portable modularized PXI instruments as hardware and software programing as its kernel, having overcome the disadvantages of traditional ones and having good environmental adaptability and capability of function expansion, this system is especially suitable for the site tests in radar stations.