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首页> 外文期刊>IEEE Transactions on Microwave Theory and Techniques >Influence of Radar Targets on the Accuracy of FMCW Radar Distance Measurements
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Influence of Radar Targets on the Accuracy of FMCW Radar Distance Measurements

机译:雷达目标对FMCW雷达测距精度的影响

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摘要

Distance measurement tasks in micromachine tools need to be performed with micrometer accuracy. For such tasks, frequency-modulated continuous-wave (FMCW) radars with a combination of frequency and phase evaluations are a good choice. However, the accuracy cannot be indefinitely increased as there are constraints on the target size and placement imposed by the limited space inside micromachines. This paper investigates the influence of target geometry and position on the accuracy of its range estimation using a W-band FMCW radar with a bandwidth of 25 GHz. A relation between target geometry and accuracy is established through the Cramér-Rao lower bound (CRLB). Based on the measurements of different targets, an optimal shape and size is proposed, which provides an average accuracy in the single digit micrometer range. Furthermore, the influence of different bandwidths on the accuracy is investigated. It is also demonstrated how the CRLB can be used to optimize the size of a target, when a certain accuracy is needed. In addition, antenna field regions are analyzed for suitable target placements. Finally, the radar system is implemented in a machine tool and measurements with accuracies in the micrometer range are carried out.
机译:微型机床中的距离测量任务需要以微米精度执行。对于此类任务,将频率和相位评估相结合的调频连续波(FMCW)雷达是一个不错的选择。但是,由于目标尺寸和微型计算机内部有限空间所施加的位置存在限制,因此无法无限提高精度。本文使用带宽为25 GHz的W波段FMCW雷达,研究了目标几何形状和位置对其测距精度的影响。通过Cramér-Rao下界(CRLB)建立目标几何形状与精度之间的关系。根据不同目标的测量结果,提出了一种最佳形状和尺寸,该形状和尺寸可以提供单位数微米范围内的平均精度。此外,研究了不同带宽对精度的影响。还演示了当需要一定的精度时,如何使用CRLB优化目标的大小。另外,分析天线场区域以寻找合适的目标位置。最后,将雷达系统安装在机床中,并进行微米范围内的精度测量。

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  • 作者单位

    Institute of Radio Frequency Engineering and Electronics, Karlsruhe Institute of Technology, Karlsruhe, Germany;

    Institute of Radio Frequency Engineering and Electronics, Karlsruhe Institute of Technology, Karlsruhe, Germany;

    Institute of Radio Frequency Engineering and Electronics, Karlsruhe Institute of Technology, Karlsruhe, Germany;

    Fraunhofer Institute for High Frequency Physics and Radar Techniques FHR, Wachtberg, Germany;

    Institute of Integrated Systems, Ruhr University Bochum, Bochum, Germany;

    Institute of Radio Frequency Engineering and Electronics, Karlsruhe Institute of Technology, Karlsruhe, Germany;

    Institute of Radio Frequency Engineering and Electronics, Karlsruhe Institute of Technology, Karlsruhe, Germany;

    Institute of Radio Frequency Engineering and Electronics, Karlsruhe Institute of Technology, Karlsruhe, Germany;

    Institute of Integrated Systems, Ruhr University Bochum, Bochum, Germany;

    Institute of Radio Frequency Engineering and Electronics, Karlsruhe Institute of Technology, Karlsruhe, Germany;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Radar cross-sections; Radar antennas; Estimation; Bandwidth; Antenna measurements;

    机译:雷达截面;雷达天线;估计;带宽;天线测量;

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