摘要
针对24 GHz的FMCW雷达,探讨了雷达水位测量系统的关键技术,设计了开环VCO曲线校正方法,提出了基于契比雪夫多项式的Chirp Z快速变换及其具体设计,开发了基于DSP(TMS320F28335)的雷达水位测量装置样机,实验表明采用上述方法可实现良好的测量精度,在10 m范围内误差不超过±2 cm,可实现连续快速的在线测量,节约了测量时间,在调制带宽有限的情况下,提高了系统的测量效率。
This paper discusses the key technologies of FMCW radar level gauge system in terms of its applications of water level measurement, especially in flash floods disaster. The open-loop calibration method of VCO curve was designed and the fast implementation of Chirp Z Transform based on Chebyshev＇s polynomials was introduced. We developed the radar level gauge system based on DSP （ TMS320F28335 ）. Experimental results showed that the above method can achieve good measurement accuracy ： error less than 2 cm in 10 m ranges. The radar level gauge system can do continuous on-line measurement fast. It saved measurement time and Improved the measurement efficiency in limited modulation bandwidth, especially for the case of water torrents disasters with water level changing fast.
出处
《中国农村水利水电》
北大核心
2017年第7期99-102,106,共5页
China Rural Water and Hydropower
基金
"十二五"国家科技支撑计划课题"村镇区域防洪关键技术研究"(2014BAL05B02)
