| 摘要: |
| 计量级高精度测量对雷达液位计的系统设计和处理方法等提出了诸多挑战，调频连续波雷达通过测量发射信号和回波信号的频率差来测量距离，能够获得较高的测量精度，同时由于其易于实现，是雷达液位计的主要体制之一。在介绍FMCW雷达液位计的系统原理基础上，对诸如晶振频率、调频斜率、工作环境等影响测量精度的因素进行了分析，提出了相应的解决措施，并开展了高精度频谱估计技术研究。该项技术在实际的雷达液位计上得到了应用，其测量精度满足系统要求。 |
| 关键词: 计量级 调频连续波雷达 高精度 频谱估计 |
| DOI：DOI:10.3969/j.issn.1672-2337.2019.02.007 |
| 分类号:TN958.94；TH816 |
| 基金项目: |
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| High Accuracy Measurement Technology of Metrological Radar Level Meter |
|
XIE Jinhua, GUO Mingming
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AVIC Leihua Electronic Technology Research Institute, Wuxi 214063, China
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| Abstract: |
| Metrological high accuracy measurement presents many challenges to the system design and processing of radar level meter. LFCW radar measures distance by estimating the difference frequency between the transmitted wave and echo, high precision measurement can be obtained. And also it is easy to implement, so it becomes one of the main systems of radar level meters. On the basis of introducing the system principle of radar level meter, the influences of the crystal-controlled frequency, the slope of frequency modulation, the speed of light, and the work environment on the measurement accuracy are analyzed, and the corresponding solutions are put forward. Finally, a method of high accuracy range measurement technology is presented. This technology has been applied to the practical radar level meter and the measurement accuracy meets the system requirement. |
| Key words: metrological FMCW radar high accuracy spectrum estimation |
