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High-resolution rangefinder with a pulsed laser developed by an undersampling method

机译：通过欠采样方法开发的带脉冲激光的高分辨率测距仪

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摘要

A high-resolution rangefinder equipped with a pulsed laser has been developed by introducing a high-resolution interpolation technique based on an undersampling method. Using this pulse method employed by the rangefinder, a new time-scale expansion has been realized that is similar to the heterodyne of the rangefinder that also employs the phase difference method. Therefore, high-resolution measurements are now possible. A bandpass-filtered temperature-compensated crystal oscillator signal with a reference frequency of 15 MHz is sampled at a timing determined by a received pulsed light with a repetition rate of 8.5 kHz. With this process, a time series of undersampled 2.5-kHz data are obtained as an intermediate step that can be further lowered to 85 Hz by final rearrangement of the undersampled data. With this technique, a reference frequency is transformed into a lower frequency. A distance is then calculated from the phase of this low frequency. The rangefinder developed shows good performances that include a range resolution of better than 1 mm, nonlinearity within ±1 mm, and a measurement range Of up to 7000 m.
机译：通过引入基于欠采样方法的高分辨率插值技术，已经开发了配备有脉冲激光的高分辨率测距仪。使用测距仪采用的这种脉冲方法，已经实现了新的时标扩展，它与也采用相位差方法的测距仪的外差相似。因此，现在可以进行高分辨率测量。在接收频率为8.5 kHz的脉冲光确定的定时，对参考频率为15 MHz的带通滤波的温度补偿晶体振荡器信号进行采样。通过此过程，获得了欠采样的2.5 kHz数据的时间序列作为中间步骤，可以通过对欠采样的数据进行最终重排将其进一步降低至85 Hz。利用这种技术，基准频率被转换为较低的频率。然后从该低频的相位计算距离。开发的测距仪显示出良好的性能，包括1 mm以上的范围分辨率，±1 mm以内的非线性和高达7000 m的测量范围。

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  • 来源
    《Optical engineering》 |2010年第6期|p.064302.1-064302.8|共8页
  • 作者

    Masahiro Ohishi; Fumio Ohtomo; Masaaki Yabe; Mitsuru Kanokogi; Takaaki Saito; Yasuaki Suzuki; Chikao Nagasawa;

  • 作者单位

    Topcon Corporation Corporate R&D Center General Engineering and Development Division 75-1 Hasunuma-cho Itabashi-ku Tokyo, 174-8580 Japan;

    rnTopcon Corporation General Engineering and Development Division 75-1 Hasunuma-cho Itabashi-ku Tokyo, 174-8580 Japan;

    rnTopcon Corporation Positioning Instruments Engineering Department Positioning Business Unit 75-1 Hasunuma-cho Itabashi-ku Tokyo, 174-8580, Japan;

    rnTopcon Corporation Positioning Instruments Engineering Department Positioning Business Unit 75-1 Hasunuma-cho Itabashi-ku Tokyo, 174-8580, Japan;

    rnTopcon Corporation Positioning Instruments Engineering Department Positioning Business Unit 75-1 Hasunuma-cho Itabashi-ku Tokyo, 174-8580, Japan;

    rnTopcon Corporation Positioning Instruments Engineering Department Positioning Business Unit 75-1 Hasunuma-cho Itabashi-ku Tokyo, 174-8580, Japan;

    rnTokyo Metropolitan University Graduate School of System Design 6-61 Asahigaoka-cho Hino-shi Tokyo, 191-0065 Japan;

  • 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

    pulsed laser; rangefinder; time of flight; distance measurement; analog-to-digital conversion;

    机译：脉冲激光测距仪;飞行时间;距离测量;模数转换;

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