The design and implementation of one type of radar signal analyzer

Abstract

The design of radar signal analysis was presented in this paper, adopt the method of cable collection, wireless transmission, realize the radar signal test online. established the database of test nodes, board card, Subsystem combination, the fault relationship, structure, circuit diagram, maintenance resources such as database, fulfill the dynamic link of database, analyze node connection relationship, signal feature(waveform、 frequency、circuit、structure location) by contrasting data to form Nonlinear fault diagnosis to eliminate radar fault. One type of radar integrate laser, TV, infrared, the fire control computer, and X/Ka band radar, it is complete function, advanced technology, complicated system and hard technical support. Signal analyzer can test radar signal parameters on line, provide a kind of effective detection methods for equipment maintenance. 1 The system general design 1.1 System composition Signal analyzer consist of two parts of software and hardware, hardware consist of five part of radar signal adapter, signal collection equipment, wireless communication, signal processing module and signal analyzer host, software consist of database, data analysis software, system control software. The principle diagram as shown in figure 1. 1.2 System function 1.2.1 Real-time detection of radar signal on line The signal parameters can be detected in working state by adaptor. There are two ways to collect the radar signal. The first method detect Dc signal、power frequency signal by handy wireless collector,realize the data communication between collector and analyzer host by bluetooth; The second method detect the signal by signal acquisition card input interface of analyzer host when the signal is transmitted in high speed in cable. 1.2.2 Analysis of characteristics of the tested signal Analyzer host store 、process、extract signal parameters of collected signal, dynamic link with database of test not、 board card、subsystem combination、fault relationship、structure、 circuit diagram、 maintenance resources, contrasted analyze, display node connection relationship between up and down、signal characteristics (waveform, frequency, circuit, location), form a scientific nonlinear fault diagnosis, eliminate equipment failure. 2 System implementation 2.1 The design and implementation of testing radar signal online 2.1.1 Radar signal adapters It should analyze and classify to the joint in optimization, general principle when design adapter. The adaptor is designed to square with detection holes Up and down to facilitate measurement. The device collect the I/O signal of subsystem in cable. Put the corresponding adapter between 4th International Conference on Machinery, Materials and Computing Technology (ICMMCT 2016) © 2016. The authors Published by Atlantis Press 1300 the I/O Cable end and subsystem socket when testing, can test and maintenance I/O signal of subsystem when radar is on working state. Figure 1 The principle diagram of signal analyzer 2.1.2 testing of radar signal Signal analyzer design data acquisition and processing system of radar signal, mainly includes of signal conditioning circuit, A/D converter circuit, FPGA circuit, USB circuit and power supply module. 2.1.2.1 signal preprocessing circuit signal preprocessing circuit using the ADT1-1 produced by Mini-Circuits to preprocess the analog signal, made the voltage range of input signal can satisfy the demands of A/D converter input, and fulfill the transformation function of single-ended or differential input form. 2.1.2.2 Converter circuit Converter circuit using the AD9238 produced by ADI company to convert analog signals into digital signals. The chip has 20/40/65 MSPS several different sampling rate, 40MSPS was be selected. And the chip is a dual channel sampling device, a resolution of 12 bit, a large dynamic range, the analog input range: 1Vp-p to 2Vp-p. 2.1.2.3 FPGA circuit FPGA is the abbreviation of field programmable gate array. Main fulfill the function of sampling data storage, data processing, programming according to different requirement of data processing, has the characteristics of the programmable. 2.1.2.4 USB circuit USB circuit communicate between FPGA and PC. 2.1.2.5 Power supply module the host of signal analyzer signal processing module radar signal adapter tested subsystem signal collection database storage Failure analysis Fault alarm