新型天气雷达接收机动态范围测试集成系统

A new dynamic range integrated testing system for weather radar receiver

针对我国新一代天气雷达站技术保障的现状,介绍一种新型的天气雷达接收机动态范围测试集成系统,其包括数/模转化器、数字下变频处理模块和VPX总线接口(VPX为交叉连接设备)。通过实际工作将传统的测试方法和仪器与新型集成测试系统相比,新型天气雷达接收机动态范围检测系统具有以下优点:采用高速高精度A/D采样,全数字化处理,动态范围结果判别采用优化算法,提高了接收机动态范围测试结果的准确性;接收机动态范围测试采用一键式测量,只需点击终端软件测试按钮,程序自动完成动态范围测试,避免了人为误差的同时也提高了测试效率;测试完成后直接生成测试报告并参照大量雷达测试、检修人员的经验数据,结合雷达系统结构对测试中不合格项产生的原因进行简要剖析,给出检修建议,方便操作人员快速修复雷达故障。该系统带来的有益效果为:采用VPX总线,可靠性好;全数字化处理、精度高、稳定性好;全自动测试流程,无需人工干预。

In view of the current technical guarantee status of the new generation weather radar station in China,a new in-tegrated system for dynamic range testing of the weather radar receiver is proposed.The system is composed of the digital-analog converter(ADC),digital variable-frequency processing module,and VPX(cross connection device)bus interface.The tradition-al testing method and instruments are compared with the new integrated testing system in practical work,and the new dynamic range detection system for the weather radar receiver has a lot of advantages:high-speed high-precision A/D sampling,all-digital processing and the optimization algorithm with dynamic range result judgment,which can improve the accuracy of dynamic range testing results of the receiver.One-button measurement is adopted in the dynamic range testing of the receiver,that is,just click on the testing button of terminal software,and the dynamic range testing will be automatically completed by means of the program,which can not only avoid human error but also improve testing efficiency.The testing report is directly generated af-ter completion of the testing.With reference to the experience data of the maintenance personnel and a great quantity of radar tests,brief reason analysis of unqualified items generated during the test is performed,combining with the structure of the radar system.Maintenance suggestions are given so that the operation personnel can quickly repair radar faults.The system has good reliability by using the VPX bus,high precision and good stability by using all-digital processing,and needs no manual interven-tion by using the whole automatic test process.