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2004 Fiscal Year Final Research Report Summary

3-D Interface for Dynamic Geometric Operation Using Plastic Object as Input Tool

Research Project

Project/Area Number 15360131
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Intelligent mechanics/Mechanical systems
Research InstitutionThe University of Tokyo

Principal Investigator

MURAKAMI Tamotsu  The University of Tokyo, Graduate School of Engineering, Associate Professor, 大学院・工学系研究科, 助教授 (20212251)

Project Period (FY) 2003 – 2004
Keywords3D input interface / haptic interface / conductive clay / human interface / 3D computer graphics / computer aided design / geometric modeling
Research Abstract

In this research, we propose an input tool which carries out plastic modification like clay as a real time three-dimensional form operation interface. First, plastic material with which modification (change of the distance for two points) is electrically measurable is investigated and an oil clay consisting of wax, machine oil, calcium carbonate, soap, and glycerin is selected. Based on the result of basic experiments about the characteristic of the selected conductive clay, the input device having eight terminals to the eight vertices of a conductive clay cube is designed and manufactured.
The methods for compensating limited accuracy of each measurement value in the conductive clay are devised as follows.
-General measures, such as smoothing noises by taking two or more averages of the measurement values for time, and a setup of dead zone which cuts the measurement value below a specified amount.
-Preparation of a cover around a terminal to reduce an influence of a contact state change (pressure) between a terminal and clay caused by hand operation.
-Compensation of the whole modification calculation result by assuming that the clay volume is constant.
-Using the rate of measurement value change, instead of the value itself to compensate the inhomogeneity of the material and the terminal characteristic.
-Using the measured resistance value between local two terminals to compensate local contact condition between the terminal and the clay.
The above compensation methods are implemented to the input tool. It is confirmed that when a user bends, presses and twists the clay tool, its 3-D deformation is electrically measured and applied to a virtual model on a computer display. Also, the problem of limited accuracy and stability of the conductive clay as an input tool which it not originally designed or manufactured to be used as a sensor.

  • Research Products

    (6 results)

All 2004 2003

All Journal Article (6 results)

  • [Journal Article] ユニバーサル・デザインの体系的方法論へのアプローチ2004

    • Author(s)
      村上存, 出口雅俊
    • Journal Title

      Design Symposium 2004講演論文集(日本設計工学会/日本機械学会/精密工学会/日本建築学会/日本デザイン学会共催)

      Pages: 215-220

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] An Approach to Systematic Methodology for Universal Design2004

    • Author(s)
      Tamotsu Murakami, Masatoshi Deguchi
    • Journal Title

      Proceedings of Design Symposium 2004 (in Japanese)

      Pages: 215-220

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] 塑性物体を入力装置とする動的3次元形状操作インタフェース2003

    • Author(s)
      村上存, 小林剛也, 水留浩一
    • Journal Title

      ヒューマンインタフェースシンポジウム2003論文集

      Pages: 243-246

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] 塑性物体を入力装置とする動的3次元形状操作インタフェース2003

    • Author(s)
      村上存, 小林剛也, 水留浩一
    • Journal Title

      日本機械学会第13回設計工学・システム部門講演会講演論文集

      Pages: 281-284

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] 3-D Interface for Dynamic Geometric Operation Using Plastic Object as Input Tool2003

    • Author(s)
      Tamotsu Murakami, Goh Kobayashi, Koichi Mizutome
    • Journal Title

      Proceedings of the Human Interface Symposium 2003 (in Japanese)

      Pages: 243-246

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] 3-D Interface for Dynamic Geometric Operation Using Plastic Object as Input Tool2003

    • Author(s)
      Tamotsu Murakami, Goh Kobayashi, Koichi Mizutome
    • Journal Title

      JSME 13th Design and Systems Conference (in Japanese)

      Pages: 281-284

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 2006-07-11  

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