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

使用塑料物体作为输入工具进行动态几何操作的 3D 界面

基本信息

批准号：
15360131
负责人：
MURAKAMI Tamotsu
金额：
$ 2.24万
依托单位：
The University of Tokyo
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
2003
资助国家：
日本
起止时间：
2003 至 2004
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-15360131/
关键词：
3D input interface haptic interface conductive clay human interface 3D computer graphics computer aided design geometric modeling haptic input device 受動反力

项目摘要

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.

在本研究中，我们提出一种像黏土一样进行塑性修改的输入工具，作为真实的实时三维表单操作界面。首先，塑料材料的修改（两点的距离的变化）是电测量的调查和油粘土组成的蜡，机油，碳酸钙，肥皂，甘油被选中。根据对所选导电粘土特性的基础实验结果，设计并制作了具有八个端子的输入装置，该输入装置与导电粘土立方体的八个顶点相连，并提出了补偿导电粘土中各测量值有限精度的方法。一般措施，例如通过对时间测量值取两个或多个平均值来平滑噪声，以及设置死区，将测量值降低到指定量以下。在端子周围准备覆盖物，以减少由手操作引起的端子和粘土之间的接触状态变化（压力）的影响。通过假设粘土体积恒定来补偿整个修改计算结果。使用测量值变化率，而不是测量值本身来补偿材料和终端特性的不均匀性。利用测得的局部两端子间的电阻值来补偿端子与粘土间的局部接触状态，并将上述补偿方法应用到输入工具中。经证实，当用户弯曲、按压和扭转粘土工具时，其3D变形被电测量并应用于计算机显示器上的虚拟模型。此外，导电粘土作为输入工具的有限精度和稳定性的问题，其最初不是设计或制造成用作传感器。