| 王鹏,耿凯,孙长库.基于FPGA的激光多普勒测长仪信号处理算法研究[J].光电子激光,2018,29(12):1325~1331 |
| 基于FPGA的激光多普勒测长仪信号处理算法研究 |
| Research on the signal processing algorithm of laser Doppler length measuring instrument based on FPGA |
| 投稿时间：2018-03-27 |
| DOI： |
| 中文关键词: 激光多普勒测长 自适应采样频率 FFT-FS频谱细化 比值校正 |
| 英文关键词:laser Doppler length measurement adaptive sampling frequency FFT-FS spectral thinning ratio correction |
| 基金项目: |
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| 摘要点击次数: 737 |
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| 中文摘要: |
| 针对激光多普勒测长仪多普勒频率的准确提取问 题,提出了一种基于FPGA的自适应采样频率的多普勒信号 处理算法。首先通过跟踪多普勒频率实现了采样频率的自适应选择,提高了低速测量的准确 度,扩大了系统的测速 范围；结合了FFT-FS频谱细化算法和比值校正算法,有效减小了测量误差,进一步提高了 多普勒频率提取的准确度； 最终通过多组长度测量实验,验证了算法的可行性,测量结果的相对误差优于0.1%。 |
| 英文摘要: |
| Aiming at the accurate extraction of Doppler frequency of laser Dopple r length measuring instrument,an adaptive sampling frequency Doppler signal processing algorithm based FPGA is pr oposed.The adaptive selection of sampling frequency is realized by tracking Doppler frequency,t he accuracy of low speed measurement is improved and the velocity range of the system is expanded.The FF T-FS spectrum thinning algorithm and the ratio correction algorithm are combined to effectively reduce the measurement error and further improve the accuracy of the Doppler frequency extraction.Finally,the feasibili ty of the algorithm is verified by a variety of length measurement experiments,a nd the relative error of the measurement results is less than 0.1%. |
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