Signal Analyzing Algorithm of Liquid Level Radar Based on Full Period Adaptive Sampling
Xiaomei Lin · Huagong zidonghua ji yibiao · 2004
In this paper echo signal of linear frequency modulation ranging radar is the middle frequency signal which is from 0～40 MHz.The accurate algorithm of the spectrum analysis is the premise that realizes high precision location.The relation between frequency of echo signal and distance is established based on character of echo signal.Based on digital signal processing and full period sampling method the sampling of double frequency is realized,and calculating precision is improved effectively.The spectrum leakage phenomena and the phases error is avoided ,and liquid level can be measured accurately in real time.The algorithm is valid by experiment on simulation platform.