Implementation And Research Of Cross-linking Verification System

For a secondary radar system,it needs an interface cross-link verification system to perform a variety of tests such as external field wireless test and in-field wired test.The hardware system of the interface cross-connection verification system is able to obtain multi-point GPS position coordinates and time information,and can complete data transmission of control instructions,position information,time-based information,and status information through wired and wireless methods.The hardware system also needs to have a communication interface with the device under test,Furthermore,it should be able to complete the inquiry and guidance of the tested device under the control of the interface cross-connection verification software system,and to process,store,read the data returned by the coordinate measurement device and the tested device.This thesis proposed an overall scheme of the interface cross-link verification system,and conducted research work on the calibration of secondary radar measurement accuracy and interface testing system.(1)An RTK differential GPS calibration method with high-precision angle measurement ranging capability was adopted to calibrate the secondary radar.The data obtained in the practical measurement is converted into the station-centered ground coordinates.The error propagation theorem is used to calculate the distance measurement error.The error of the angle and distance,compared with the secondary radar measurement error,can demonstrate the effectiveness of the method.Based on this method,the design of the entire system scheme is completed.(2)The interface testing system is mainly for the secondary radar system equipment testing and verification.It is used to test interfaces under various environmental protocols,such as PCIe,Rapid IO,aviation bus 1553 B,and CAN bus.This thesis completes the design of the interface testing system based on the PCIe/PCI framework,and designs multiple FPGA modules to realize high-speed RapidIO interface and PCIe bus interface,The simulation verification and performance test was carried out.This thesis provides reliable theoretical basis and engineering implementation of the calibration of secondary radar measurement accuracy based on RTK differential GPS and cross-link verification of various communication protocol interfaces.It also proposes how to build a PCI/PCIe-based interface platform that can test and verify multiple communication protocols.