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公开(公告)号：JP2000067272A
公开(公告)日：2000-03-03
申请号：JP22641999
申请日：1999-08-10
Applicant: IBM
Inventor： ITO TAKAYUKI , FURUHATA TOMOTAKE , SHIMADA KENJI
Abstract: PROBLEM TO BE SOLVED: To generate a rectangular mesh from a triangular mesh. SOLUTION: This mesh generating method is provided with a step for calculating a first evaluation value expressing the relation of each candidate rectangle element (called adjacent triangle element pair as well) generated from a pair of adjacent triangle elements and the arranging direction of rectangle elements designated by a user and a second evaluation value concerning the shape of the candidate rectangle element and a selection step for selecting any candidate rectangle element to be used as the element of the rectangular mesh out of the candidate rectangle elements. Further, a step for calculating a third evaluation value to take a first value when there is not any other triangle element to be paired with any triangle element composing the candidate rectangle element or to take a second value when there is the other element concerning each candidate rectangle element. In the selection step, the priority for this third evaluation value to select the candidate rectangle element of the first value as a rectangle element can be improved as well.
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公开(公告)号：JPH04369009A
公开(公告)日：1992-12-21
申请号：JP16525991
申请日：1991-06-11
Applicant: IBM
Inventor： FURUHATA TOMOTAKE , HIRANO TOSHIKI
IPC: B65H9/08 , G05D3/00 , G11B7/13 , G11B7/22 , H01J37/20 , H02N1/00 , H02N2/00 , H02N3/00 , H02N11/00
Abstract: PURPOSE: To provide a micro-positioning device having a sub-micron order operating range in each X and Y direction. CONSTITUTION: A pair of aluminum electrodes 3a and 3b are vaporized on a PZT pb(Zrx Ti1-x )O3 2 bound on a silicon wafer 1, and the PZT 2 is moved up and down so that the top end of a contact pin formed on the pair of aluminum electrodes 3a and 3b can be rotationally moved. This micro-actuator is arranged on a plane like a multi array, and a driving member 15 arranged on the upper face of this micro-actuator array is moved to right and left directions so that positioning can be attained.
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公开(公告)号：JP2001022956A
公开(公告)日：2001-01-26
申请号：JP19130899
申请日：1999-07-06
Applicant: IBM
Inventor： INOUE KEISUKE , ITO TAKAYUKI , YAMADA ATSUSHI , FURUHATA TOMOTAKE
Abstract: PROBLEM TO BE SOLVED: To automatically group many faces constituting a three-dimensional shape into a plurality of areas, while reflecting the intention of a designer. SOLUTION: A clustering part 32 accepts shape models, respectively showing faces constituting a three-dimensional shape and constraint condition data showing which faces among these faces has to be absolutely included in a different (or same) cluster. The part 32 first selects faces that must necessarily be included in the same cluster from a shape model DB 26 and prepares an initial cluster by combining them. Furthermore, the part 32 successively combines clusters with one another the directions of normal lines of which are near and which give smooth frame lines after being combined, and outputs a cluster respectively guaranteeing the area which is equal to or larger than an appropriate area as the final processing result.
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公开(公告)号：JPH10334265A
公开(公告)日：1998-12-18
申请号：JP12445897
申请日：1997-05-14
Applicant: IBM
Inventor： YAMADA ATSUSHI , INOUE KEISUKE , ITO TAKAYUKI , FURUHATA TOMOTAKE
Abstract: PROBLEM TO BE SOLVED: To provide a curved meshing method which can mesh a trim curved surface and a complicated curved surface shape, can control the size distribution of elements to be generated, can generate the triangle elements of designated shapes and also can attain a fully automatic method. SOLUTION: At first, a curved surface to be meshed is inputted together with the tensors set at each point on time curved surface. Then a bubble is generated in a parameter space corresponding to the curved surface in response to the tensor that is deformed according to the correspondence relation between the curved surface and the parameter space. The bubble is moved in the parameter space by the inter-bubble force that is designated by a prescribed rule and then deformed by means of a deformed tensor. At the same time, the number of bubbles is controlled. Thus, the bubbles are stably arranged in the parameter space. Then the connection relation is decided in the parameter space for the mesh nodes, i.e., the center points of bubbles arranged in the parameter space. Finally, a mesh is generated on the curved surface based on the positions and the connection relation of mesh nodes.
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公开(公告)号：JPH11120382A
公开(公告)日：1999-04-30
申请号：JP28034097
申请日：1997-10-14
Applicant: IBM
Inventor： ITO TAKAYUKI , INOUE KEISUKE , YAMADA ATSUSHI , FURUHATA TOMOTAKE
Abstract: PROBLEM TO BE SOLVED: To calculate an inter-valve force so that valves are not in the hexagonally densest state and to automatically generate quadrilateral meshes by adaptively assuming the direction in which the inter-valve force operates to the contiguity direction of a contiguous valve without limiting to the center of the contiguous valve. SOLUTION: An object shape of meshing is inputted and valves are generated in an area in the shape. Then points of minimum potential are defined at four points on two straight points passing the centers of the valves at the periphery of one valve. An array direction is inputted as a vector, so the direction of this vector and its orthogonal direction are the two straight segments in the figure. Then the sum of forces from the potential fields of contiguous valves is calculated. Thus, the valve is moved with the force prescribed with the potential field set for the valve and the number of valves is controlled to determine the stable arrangement of the valves; and the centers of contiguous valves are connected to generate meshes.
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Patent Agency Ranking
公开(公告)号：JPH11110586A
公开(公告)日：1999-04-23
申请号：JP24085897
申请日：1997-09-05
Applicant: IBM
Inventor： FURUHATA TOMOTAKE , ITO TAKAYUKI , INOUE KEISUKE , YAMADA ATSUSHI
Abstract: PROBLEM TO BE SOLVED: To automatically prepare a quadrilateral mesh by calculating a stable arrangement of bubbles of two or more kinds and connecting only the center points of the bubbles of a specified kind. SOLUTION: First, an object to be meshed and the aligning direction of a mesh are inputted (S110). Then, mesh nodes are arranged at the vertex and ridge line of the inputted object (S120). Then, the bubbles are initially arranged on the surface of the inputted object (S130). At the time, the bubbles of the two kinds are introduced. Then, the quadrilateral mesh is generated (S150). Then, a hexahedron bubble is generated in a three-dimensional space. Initially, the bubbles are arranged in the space (S160) and then the stable arrangement of the bubbles is calculated (S170). The calculation is almost similar to a processing for the surface. Then, when tetrahedron division is executed and only line segments for connecting the bubbles of a first kind are extracted, a hexahedral mesh is generated (S180).
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公开(公告)号：JPH09146708A
公开(公告)日：1997-06-06
申请号：JP29080195
申请日：1995-11-09
Applicant: IBM
Inventor： FURUHATA TOMOTAKE , HIRANO TOSHIKI , SAWADA CHIHIRO
Abstract: PROBLEM TO BE SOLVED: To obtain a driving method and a touch input method for the touch panel which make it easy to recognize a double touch on the touch panel by tapping different positions with a 1st and a 2nd depressing means and judging whether or not the double tapping is done at a desired position. SOLUTION: The index fingers 34 is pressed against the inside of the frame of an icon 36 and the position where the index finger 34 is placed is outputted from the touch panel 32 (a). Then while the index finger 34 is depressed against the icon 36 on the touch panel 32, another position on the touch panel 32 is tapped with the middle finger 40. The touch panel 32 outputs the position indicated with the tip of the arrow 42 in a figure, i.e., a position nearby the mid-point on the line connecting the index finger 34 and middle finger 40 (b). When the index finger 34 is placed only on the icon 36 on the touch panel 32, the touch panel 32 outputs the position where the index finger 34 is placed as shown with the tip of an arrow 44, so that the double tapping is recognized (c).
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公开(公告)号：JP2001188919A
公开(公告)日：2001-07-10
申请号：JP36568699
申请日：1999-12-22
Applicant: IBM , UNIV CARNEGIE MELLON
Inventor： YAMADA ATSUSHI , FURUHATA TOMOTAKE , SHIMADA KENJI , KOOSHU HOU
Abstract: PROBLEM TO BE SOLVED: To generate a smooth curve or curved surface. SOLUTION: A 1st step for storing the normal of respective nodes constituting a line or plane in a storage device so as to change the positions of the nodes, a 2nd step for changing the positions of the nodes and storing position information in the storage device by (1) virtually defining elastic bodies connected to the respective nodes in the normal directions of the nodes and (2) expanding and contracting the respective elastic bodies in the normal directions so that the respective elastic bodies are balanced, and a step for repeating the 1st and 2nd steps until specific conditions are met are carried out.
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公开(公告)号：JP2001022962A
公开(公告)日：2001-01-26
申请号：JP18034899
申请日：1999-06-25
Applicant: IBM
Inventor： YAMADA ATSUSHI , FURUHATA TOMOTAKE , ITO TAKAYUKI
Abstract: PROBLEM TO BE SOLVED: To perform division processing of a processing object area into a plurality of polygonal areas, so that a curved patch can be interpolated smoothly in a three-dimensional shape. SOLUTION: A mesh generating part 30 first simply performs division processing of a processing object area and generates initial mesh data obtained by burying the processing object area with a plurality of square faces. Next, the part 30 adds a square face to a part coming into contact with the frame of the processing objet area, for instance, so that an arbitrary point of the frame of the processing object area can be included only in one or two square faces. When the optional point of the frame of the processing object area is prevented from being shared by three or more square faces, a curved patch can be interpolated in the processing object area, without deforming the shape of the frame.
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公开(公告)号：JP2000293707A
公开(公告)日：2000-10-20
申请号：JP8813199
申请日：1999-03-30
Applicant: IBM
Inventor： YAMADA ATSUSHI , FURUHATA TOMOTAKE , ITO TAKAYUKI
Abstract: PROBLEM TO BE SOLVED: To generates a curved line or a curved surface which consist of a set of polygons and change smoothly by relating each given point to its closest node, calculating quantity from an adjacent node and changing the positions of plural nodes of initial mesh. SOLUTION: Unit normals of all nodes are successively calculated (S1620). A displacement vector Vbend due to bending power from an edge node is calculated (S1630). A displacement vector Vstretch due to stretching power from an adjacent node is calculated (S1635). A displacement vector Vfit due to power from a related point is calculated (S1640). A final displacement vector Vall is calculated from the Vstretch, Vbend and Vfit (S1645), and the value of the Vall is added to the position vector of a node Pi (S1650). The new coordinate values of the node Pi are calculated by adding the Vall to the coordinates of a node being the current object (S1650).
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