Study On Liquid Level Measurement Of Lfmcw Radar Systems And Signal Processing

Because of the advantages of no range blind area, high range resolution, low signal power and simple structure, LFMCW (Linear Frequency Modulation Continuous Wave) radar attracted more and more attention recently. The theories, key technologies and application develop rapidly.The main features and applications of the LFMCW radar in the radar altimeters, automotive highway monitoring systems, warship navigation systems and other areas are reviewed first. Based on the relevant research results, the liquid level measurement system are researched, included system design, the selection and computation of important parameter, the research of signal processing arithmetic, the development of hardware, the software realization of arithmetic and the debugging of signal processing system.The main research work and results can be summarized as follows:1. Accomplish the liquid level measurement system design , and the selection and computation of key parameter.2. Accomplishing the design and simulator of the signal processing arithmetic, a curving arithmetic of increase the accuracy of the level measurement system is researched, and compared with maximum estimation at the same time.3. Accomplishing the realization of the signal processing arithmetic4. Using the C8051F020 board as the hardware platform, this paper realizes the signal processing curving arithmetic. The results of software simulator and hardware the work is effective and coincident with the system's demand.