| 雷达流速仪测量精度关键技术研究 |
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| 引用本文： | 周冬生,宗军,蒋东进,张恒.雷达流速仪测量精度关键技术研究[J].水文,2018,38(5):67-70. |
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| 作者姓名： | 周冬生 宗军 蒋东进 张恒 |
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| 作者单位： | 水利部水文水资源监控工程技术研究中心;水利部南京水利水文自动化研究所;江苏南水水务科技有限公司;南京仁欧科技有限公司 |
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| 摘 要： | 雷达流速仪在水文测验中的应用越来越广泛,目前该类产品主要存在流速测量精度偏低、对波浪等外界环境影响难以克服、不能适应低流速等问题。提出在快速傅里叶变换基础上使用最大值插值拟合算法提高流速测量精度的方法,采用多普勒频率加权平均算法消减波浪对流速测量的影响,利用变频方法满足较低流速测验的精度要求,并且将研究成果应用于新型雷达流速仪样机,进行了仿真试验及验证。试验表明,方法合理可行,可较好解决目前雷达流速仪普遍存在的上述问题,具有良好应用前景。
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| 关 键 词： | 雷达流速仪 多普勒效应FFT 最大插值拟合 |
| 收稿时间： | 2018/1/22 0:00:00 |
Core Technology Research on High Precision for Radar Velocity Meter |
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| ZHOU Dongsheng,ZONG Jun,JIANG Dongjin,ZHANG Heng.Core Technology Research on High Precision for Radar Velocity Meter[J].Hydrology,2018,38(5):67-70. |
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| Authors: | ZHOU Dongsheng ZONG Jun JIANG Dongjin ZHANG Heng |
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| Abstract: | Radar velocity meters are widely used in hydrological survey. At present, there are some problems from the products, such as lowvelocity accuracy, influence of wave or other external environment, insensitivity at low velocity and etc. The Maximum Interpolation Fitting (MIF)based on Fast Fourier Transform (FFT) has been adopted for accuracy enhancement of flow velocity computing. Besides, the frequency conversionwas introduced for the accuracy of low velocity measurements. These research results were applied to a new-type radar current meter, and the testsof simulation and verification were carried out also. Field site tests indicate that the methods are reasonable and feasible, which can solve the aboveproblems commonly existing in radar currentmeters. |
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| Keywords: | hydrological infrastructure construction causes of failure bidding and purchasing countermeasures |
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