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A realtime 3D measurement system of moving objects using laser beam scanners

Research Project

Project/Area Number 07555429
Research Category

Grant-in-Aid for Scientific Research (A)

Allocation TypeSingle-year Grants
Section試験
Research Field 計測・制御工学
Research InstitutionOsaka University

Principal Investigator

KASAI Takeshi  Osaka University, Health and Sport Sciences, Professor, 健康体育部, 教授 (30029459)

Co-Investigator(Kenkyū-buntansha) MATUO Tomoyuki  Osaka University, Health and Sport Sciences, Research Associate, 健康体育部, 助手 (00209503)
Project Period (FY) 1995 – 1996
Project Status Completed (Fiscal Year 1996)
Budget Amount *help
¥1,500,000 (Direct Cost: ¥1,500,000)
Fiscal Year 1996: ¥1,500,000 (Direct Cost: ¥1,500,000)
Keywordslaser scanner / 3D measurement of moving object / realtime mesurement / motion analysis / measurement of outdoor sport / スポーツ計測
Research Abstract

Principle of Measurement : A laser beam scanner scans a vertical slit beam by 360Hz across a huge field, where objects (athletes) with an optical reflector are moving around. Reflected beam from moving objects is detected by a position sensing device (PSD), which determines the exact time of reflection representing horizontal angular position of the object. The vertical angular position is determined by the position output of the PSD.A statistical method and interpolation were empolyed to determine accurate coordinates of objects.
Achievements : A semiconductor laser (4w, 812nm) was used as the light source, and an aberration free lens was used to generate a rectangular beam (2mx0.2m). The beam splitter in the former model to separate the reflected light from the incident beam was replaced by a mirror with a small hole for the incident light to get through, which dramatically improved the sensitivity of the photo detector, together with a specially designed camera lens with a small aperture number. An interference filter was also employed to reject all of background illumination other than the laser light, which allowed to eliminate influence of daylight or electric illumination.
Measurement noise proved to be 0.15mm in horizontal and 0.25mm in vertical directions, when measurement is done at a posidion 20m from an object, and 0.55mm at a position 50m from an object. In 3D measurement, measurement noise in near and far direction was estimated as less than 0.26mm at 20m, and 0.95mm at 50m.
For the sake of laser light, the cross section of the beam at the surface of the polygon could be much less than the former model (Xe lamp was used as the light source), allowable scanning angle was increased by 30% (from 58deg to 75deg), resulting the size of measurement area being 30mx2m at 20m position, and 75mx2m at 50m position.
A simulation was done to prove that 10 moving objects and a reference still object positions could be determined in realtime.

Report

(3 results)
  • 1996 Annual Research Report   Final Research Report Summary
  • 1995 Annual Research Report
  • Research Products

    (15 results)

All Other

All Publications (15 results)

  • [Publications] 宮武幹夫・上原秀弘・笠井健: "光ビーム・スキャナを用いた野外運動計測システム" バイオメカニズム・シンポジウム論文集. 333-340 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] 宮武幹夫・上原秀弘・笠井健: "光ビーム・スキャナを用いた屋外スポーツの運動計測システム" バイオメカニズム13(東大出版会). 247-255 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] 多田和則・笠井健: "光ビーム・スキャナーを用いたボールの3次元運動の計測" 大阪大学健康体育部紀要. Vol.8. 21-28 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] 植村清雄・笠井健: "レーザ・スキャナを用いた運動体の遠隔実時間計測システム" 電子情報通信学会技術研究報告. BME-97(発表予定). (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] M.Miyatake, T.Kasai, H.Uehara: "Measurement system of outdoor sports using an optical beam scanner" Proceedings of Biomechanism Symposium. 333-340 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] K.Tada, T.Kasai: "Measurement of 3D movement of a ball using an optical beam scanner" Annual Report of Faculty of Health and Sport Sciences, Osaka University. vol.8. 21-28 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] K.Uemura, T.Kasai: "A real time measurement system of remote moving objects using a laser beam scanner" Technology and research report of Electronic, Information and Communication Society. MBE-97 (submitted).

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] M.Miyatake, H.Uehara, T.Kasai: Development of a measurement system of outdoor sports using an optical beam scanner, In Biomechanism 13. Todai Publish, 247-255 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] 宮武幹夫・上原秀弘・笠井健: "光ビーム・スキャナを用いた野外運動計測システム" バイオメカニズム・シンポジウム論文集. 333-340 (1995)

    • Related Report
      1996 Annual Research Report
  • [Publications] 宮武幹夫・上原秀弘・笠井健: "光ビーム・スキャナを用いた屋外スポーツの運動計測システム" バイオメカニズム13(東大出版会). 247-255 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] 多田和則・笠井健: "光ビーム・スキャナーを用いたボールの3次元運動の計測" 大阪大学健康体育部紀要. Vol.8. 21-28 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] 植村清雄・笠井健: "レーザ・スキャナーを用いた運動体の遠隔実時間計測システム" 電子情報通信学会技術研究報告. BME-97(発表予定). (1997)

    • Related Report
      1996 Annual Research Report
  • [Publications] 宮武幹夫・上原秀弘・笠井 健: "光ビーム・スキャナを用いた野外運動計測システム" バイオメカニズム・シンポジウム論文集. 333-340 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] 宮武幹夫・上原秀弘・笠井 健: "光ビーム・スキャナを用いた屋外スポーツの運動計測システム" バイオメカニズム13(東大出版会). (印刷中). (1996)

    • Related Report
      1995 Annual Research Report
  • [Publications] 多田和則・笠井健: "光ビーム・スキャナーを用いたボールの3次元運動の計測" 大阪大学・健康体育部紀要. (印刷中). (1996)

    • Related Report
      1995 Annual Research Report

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Published: 1996-04-01   Modified: 2016-04-21  

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