Automatic detection of 3-dimensions shape and the coordinates of the work-piece freely placed on the table

自动检测工作台上自由放置工件的三维形状和坐标

• 批准号: 11650142
• 负责人: KOBAYASHI Kazuhiko
• 金额: $ 0.64万
• 依托单位: University of Tokyo
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1999
• 资助国家: 日本
• 起止时间: 1999 至 2001
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-11650142/
• 关键词: Recognition of shape; Image analysis; Positioning of work-piece; Work preparations; NC program; Coordinate rotation; Work arrangements; Internet; インターネット利用; 自動測定

Generally a work-piece must be placed on the table of the machine in parallel to its coordinate axis (X-axis or Y-axis) for accurate machining. However, this kind of operation needs higher skill and experience ; therefore the following alignment method is considered effective. Namely, a work-piece is first placed roughly, and next its alignment angle error to the coordinate axis is measured, and then for compensating it the coordinate axis of the NC program is rotated as much as the angle.In this study, first a camera searches where the work-piece is placed on the table, and detects its shape and then the coordinate of its position on the machine table. By various simulations, which had been experimented, it was found that detecting edge lines and then measuring the distance between the two facing lines enabled to recognize the general shape and the size of the work-piece. To be concrete, drawing the virtual lines crossing at right angles to the edge lines and then measuring the distance between the two points of intersection enabled to detect the general size of the width, length, and height. Its measuring accuracy was almost 1 mm, and this accuracy was good enough.In practice the measuring probe moves to the neighborhood of the work-piece and detects the coordinates of the two points on the sides of work-piece. Calculating the angle between the line linking these two points and the axis one, and rotating the coordinate of NC program as much as the angle degree enabled to make the precise positioning of the work-piece. These work arrangements were done automatically.Moreover, going ahead with this study, the combination with this positioning method of work-piece and the remote control method of the machine by utilizing Internet technology found out to be very effective.

通常，工件必须平行于其坐标轴（X 轴或 Y 轴）放置在机床工作台上，才能进行精确加工。但这种操作需要较高的技巧和经验；因此下面的对齐方法被认为是有效的。即，首先粗略地放置工件，然后测量其与坐标轴的对准角度误差，然后为了补偿它，将 NC 程序的坐标轴旋转该角度。在本研究中，首先相机搜索工件在工作台上的放置位置，并检测其形状，然后检测其在机床工作台上的位置坐标。通过各种已试验的模拟，发现检测边缘线然后测量两条面对线之间的距离能够识别工件的总体形状和尺寸。具体来说，画出与边缘线成直角交叉的虚拟线，然后测量两交点之间的距离，就可以检测出宽度、长度和高度的大致尺寸。它的测量精度接近1毫米，这个精度已经足够好了。在实际应用中，测量探头移动到工件附近，检测工件侧面两点的坐标。计算这两点连线与一轴的夹角，将NC程序坐标旋转到该角度，即可对工件进行精确定位。这些工作安排都是自动完成的。而且，在本研究中，这种工件定位方法与利用互联网技术的机器远程控制方法相结合，效果非常好。

项目成果

K. Kobayashi, T. Noda, et al.: "An Experiment of the Remote Management and control of Electrical Discharge Machines By Internet-use Technology"Proceeding of Progress of Machining Technology (ICPMT' 2000). 915-919 (2000)

K. Kobayashi、T. Noda 等人：“通过互联网使用技术对放电加工机进行远程管理和控制的实验”《加工技术进展》(ICPMT 2000)。

K. Kobayashi, T. Noda, et al.: "The study on the methods for applying Internet-use technology to EDM fields"Proceedings of the 13^<th> International Symposium for Electromachining ISEM. XIII, Vol.1. 523-533 (2001)

K. Kobayashi、T. Noda等：“将互联网技术应用于EDM领域的方法研究”第13届国际电加工研讨会ISEM论文集。

K.Kobayashi, T.Noda, et al.: "An Experiment of the Remote Management and control of Electrical Discharge Machines By Internet-use Technology"Proceeding of Progress of Machining Technology (ICPMT' 2000). 915-919 (2000)

K.Kobayashi、T.Noda 等人：“通过互联网使用技术远程管理和控制放电加工机的实验”加工技术进展论文集 (ICPMT 2000)。

K.Kobayashi, T.Noda, et al.: "The study on the methods for applying Internet-use technology to EDM fields"Proceedings of the 13^<th> International Symposium for Electromachining ISEM XIII. Vol.1. 523-533 (2001)

K.Kobayashi，T.Noda，等：“将互联网使用技术应用于EDM领域的方法的研究”第13届国际电加工研讨会ISEM XIII的会议记录。