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Development of long-range, high ranging resolution and crosstalk-free LiDAR by FMCW method

Research Project

Project/Area Number 20K04501
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 21030:Measurement engineering-related
Research InstitutionKanazawa University

Principal Investigator

Iiyama Koichi  金沢大学, フロンティア工学系, 教授 (90202837)

Project Period (FY) 2020-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2022: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2021: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2020: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
Keywords光干渉計測 / FMCW法 / LiDAR / 距離計測 / 物体形状計測 / 光計測 / 光距離計測 / 光イメージング / FMCW / 光周波数掃引 / レーザレーダ
Outline of Research at the Start

自動運転に不可欠な距離センサとして,レーザ光を用いた距離センサであるLiDAR(Light Detection And Ranging)が着目されている。本研究では,光周波数が線形掃引されたレーザ光源を用い,光の干渉を利用するFMCW法によるLiDARを開発して,以下の性能を持つ次世代LiDARの実現を目的とする。
① 安全基準を満たすレーザ光パワー(10mW以下)で,200mの測定距離(現行の2倍)
② 距離分解能2cm以下,かつ,距離測定精度2mm以下(現行と同等以上)
③ 太陽光や対向車のLiDARのレーザ光など,外部光の影響を受けない

Outline of Final Research Achievements

We have developed FMCW LiDAR using a high-coherence laser diode as an optical frequency-swept laser source. The nonlinearity in the optical frequency sweep is cancelled by utilizing the k-sampling method. We have successfully profiled structures inside a building in our campus up to 200 m distant. The repetition frequency of the optical frequency sweep was increased up to 30 kHz for fast measurement, and the measurement time of about 3 sec was realized. However, the nonlinearity in the optical frequency sweep cannot be perfectly cancelled by the k-sampling method for fast measurement situation. To overcome the problem, we slightly distorted the modulation signal for optical frequency sweep to improve the linearity of the optical frequency sweep. As a result, accurate profiling can be realized even when fast repetition frequency of the optical frequency sweep.

Academic Significance and Societal Importance of the Research Achievements

FMCW LiDARは光の干渉を利用することから,外部光が非常に強い環境においても,安定した計測が可能である。また,干渉を利用することで高感度であり,レーザ光パワーが現行のToF法の100分の1以下の低パワーでも距離測定が可能である。これらのことから,屋外における測量,自動運転自動車などにおけるレーザレーダへの安全な適用が可能である。また,遠方の構造物までの距離を持続的に測定することで,構造物の揺れの検知も可能であり,構造物の健康診断や破壊予測など,防災分野への適用も可能である。

Report

(4 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Research-status Report
  • 2020 Research-status Report
  • Research Products

    (17 results)

All 2022 2021 2020

All Journal Article (2 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 2 results,  Open Access: 1 results) Presentation (14 results) (of which Int'l Joint Research: 6 results) Patent(Industrial Property Rights) (1 results)

  • [Journal Article] Path length calibration-free optical spectrometer with multi-pass absorption cell based on frequency modulated continuous wave ranging system2021

    • Author(s)
      Konishi Tomoharu、Iiyama Koichi、Yoshii Yotsumi
    • Journal Title

      Optics Communications

      Volume: 498 Pages: 127208-127208

    • DOI

      10.1016/j.optcom.2021.127208

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Low-Cost Interrogation of Long-Distance and Multipoint FBG Sensor Using Incoherent-FMCW Optical Ranging System2020

    • Author(s)
      Hanto Dwi, Iiyama Koichi
    • Journal Title

      IEEE Sensors Journal

      Volume: 20 Issue: 7 Pages: 3599-3607

    • DOI

      10.1109/jsen.2019.2959798

    • NAID

      120006876922

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Presentation] Fast and accurate three-dimensional object profiling by FMCW optical ranging system using asymmetrically optical frequency chirped VCSEL2022

    • Author(s)
      Yogetsu Nagasaka, Tomoharu Konishi, Koichi Iiyama
    • Organizer
      International Symposium on Imaging, Sensing, and Optical Memory 2022 (ISOM’22)
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Detection and profiling of building and human by FMCW LiDAR using highly coherent laser source2022

    • Author(s)
      Yuki Momose, Zhou Yu, Koichi Iiyama
    • Organizer
      International Symposium on Imaging, Sensing, and Optical Memory 2022 (ISOM’22)
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] FMCW光距離センサを利用した多点型光ファイバグレーティングセンサ2022

    • Author(s)
      杉田悠斗,飯山宏一
    • Organizer
      2022年電気・情報関係学会北陸支部連合大会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 瞬時ビート周波数の比較によるFMCW光距離センサシステム2022

    • Author(s)
      田中壮太,飯山宏一
    • Organizer
      2022年電気・情報関係学会北陸支部連合大会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 電気的周波数逓倍kサンプリング法を用いたFMCW光距離センサ2022

    • Author(s)
      くぬぎ知弥,飯山宏一
    • Organizer
      2022年電気・情報関係学会北陸支部連合大会
    • Related Report
      2022 Annual Research Report
  • [Presentation] Development of long-range FMCW LiDAR using highly coherent laser source in eye-safe wavelength range2021

    • Author(s)
      Koichi Iiyama, Zhou Yu, and Yuya Nakamura
    • Organizer
      International Symposium on Imaging, Sensing, and Optical Memory 2021 (ISOM’21)
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] Linearizing optical frequency chirp of a DFB laser by modulation waveform optimization utilizing K-sampling technique for FMCW LiDAR2021

    • Author(s)
      Meng Shan, Takahiro Ikeda, and Koichi Iiyama
    • Organizer
      International Symposium on Imaging, Sensing, and Optical Memory 2021 (ISOM’21)
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] High-speed three-dimensional object profiling using FMCW optical ranging system by continuous scanning of laser beam2021

    • Author(s)
      Tomoharu Konishi and Koichi Iiyama
    • Organizer
      International Symposium on Imaging, Sensing, and Optical Memory 2021 (ISOM’21)
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] レーザービームの連続走査によるFMCW 法を用いた3 次元物体形状測定の高速化2021

    • Author(s)
      小西朋春,長坂揺月,飯山宏一
    • Organizer
      2021年電気・情報関係学会北陸支部連合大会
    • Related Report
      2021 Research-status Report
  • [Presentation] 外部共振器レーザを用いた中距離FMCW LiDARの開発”,2021年電気・情報関係学会北陸支部連合大会2021

    • Author(s)
      喩舟,桃瀬侑生,飯山宏一
    • Organizer
      2021年電気・情報関係学会北陸支部連合大会
    • Related Report
      2021 Research-status Report
  • [Presentation] High-speed and high-accuracy three-dimensional object profiling using FMCW optical ranging system by continuous scanning of laser beam2021

    • Author(s)
      Tomoharu Konishi and Koichi Iiyama
    • Organizer
      2021年電気学会電子・情報・システム部門大会, Student Competition Session
    • Related Report
      2021 Research-status Report
  • [Presentation] High-speed three-dimensional object profiling using FMCW optical ranging system by continuous scanning of laser beam2020

    • Author(s)
      Tomoharu Konishi and Koichi Iiyama
    • Organizer
      International Symposium on Imaging, Sensing, and Optical Memory 2020 (ISOM’20)
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research
  • [Presentation] レーザービームの連続走査によるFMCW法を用いた3次元物体形状測定の高速化2020

    • Author(s)
      小西朋春,飯山宏一
    • Organizer
      レーザー学会第41回年次大会
    • Related Report
      2020 Research-status Report
  • [Presentation] 変調波形の最適化による FMCW光距離センサのための光周波数掃引の線形化2020

    • Author(s)
      飯山宏一,池田貴洋
    • Organizer
      レーザー学会第41回年次大会
    • Related Report
      2020 Research-status Report
  • [Patent(Industrial Property Rights)] 測距装置及び測距方法2022

    • Inventor(s)
      飯山 宏一
    • Industrial Property Rights Holder
      飯山 宏一
    • Industrial Property Rights Type
      特許
    • Industrial Property Number
      2022-109041
    • Filing Date
      2022
    • Related Report
      2022 Annual Research Report

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Published: 2020-04-28   Modified: 2024-01-30  

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