| The feed plant raises the bunker,when production needs to carry on the survey to its material position,is advantageous for prompt supplement raw material.But in production because time each raw material mix will produce the massive dust,and will follow has the massive quantity of heats,this for will raise the bunker the material position survey to bring certain difficulty.The range finder is the radar basic function,the high accuracy range finder,specially the short-range high accuracy range finder is the radar important civil domain.LFMCW with(LFMCW) radar to measure the position of the typical application is one of Radar.Received extensive attention in recent years,the theory and application of key technologies have developed rapidly.This article first introduced LFMCW radar technology merit and current in each domain application situation,has analyzed the chirp radar system constitution.The introduction classical radar ranging equation,by theory studies uses the different type the modulation signal demodulate radar transmitting wave effect and the use.Mainly studied increased the linear frequency modulation continuous-wave radar precision the fuzzy algorithm.The article has with emphasis studied the radar material position meter various part of hardware part realization,analyzes radar launch source DDS component and so on linear wave producer,radio frequency oscillator,disconnector,circulator,mixer, antenna principles of work,definite hardware performance index.In the electric circuit part,has mainly studied the temperature compensation electric circuit,the filter network design and the realization,has analyzed the material position meter signal processing module monolithic integrated circuit shaping and the principle of work and the flow. |
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