公开(公告)号：EP1569143A4

公开(公告)日：2009-08-12

申请号：EP03777281

申请日：2003-12-05

Applicant: RIKEN

Inventor： USAMI SHUGO ,  KASE KIWAMU

IPC: G06T15/06 ,  G06F17/50 ,  G06T17/00

CPC classification number: G06T19/00 ,  G06T15/06 ,  G06T2210/21

Abstract: A method of calculating the intersections between a triangle having three vertexes P0, P1, P2 and a line segment connecting A and B. A coordinates system R using P0 as an origin, P0P1 as the unit length of a first axis (U axis), P0P2 as the unit length of a second axis (V axis), and the unit vector of P0P1 × P0P2 as a third axis (N axis) is set, a conversion matrix M for converting the coordinates of a point in an ordinary coordinates system into a coordinates value in the coordinates system R is calculated, and the u, v, n coordinates values of the opposite ends A, B of the line segment are computed. The presence or the absence of an intersection with the triangle is judged from the u, v, n coordinates values of the opposite ends A, B, the u, v coordinates values of an intersection are computed if the intersection is available, and the presence or the absence of an intersection in the triangle is judged from the u, v coordinates values of the intersection.

公开(公告)号：EP1431850A4

公开(公告)日：2007-10-31

申请号：EP02760631

申请日：2002-08-14

Applicant: RIKEN

Inventor： OHMORI HITOSHI ,  ANZAI MASAHIRO ,  KASE KIWAMU ,  TASHIRO HIDEO ,  MAKINOUCHI AKITAKE

IPC: G05B19/4069 ,  G05B19/4097

CPC classification number: G05B19/4097 ,  G05B19/4069 ,  G05B2219/36063 ,  Y02P90/265 ,  Y10T409/300896

Abstract: (A) V-CAD data for work (1) is prepared, (B) a machined surface shape after NC-machining is predicted through simulation by using the V-CAD data, (C) the work is NC-machined under a specified NC-program and the machined surface shape after NC-machining is measured on the machine, and (D) machining correction data is determined from the difference between a machined surface shape by simulation and that by on-machine measurement to correct the NC program. Accordingly, ultra-precision machining is possible despite low-rigidity work and tool and their varying deformations.

公开(公告)号：EP1406187A4

公开(公告)日：2007-05-02

申请号：EP02743831

申请日：2002-07-04

Applicant: RIKEN

Inventor： YAMADA TOMONORI ,  KASE KIWAMU ,  MIYAMURA TOMOSHI ,  TESHIMA YOSHINORI ,  MAKINOUCHI AKITAKE

IPC: G06F17/50 ,  G06T17/00

CPC classification number: G06T17/005 ,  G06F17/5018

Abstract: A method comprises an external data input step (A) of inputting external data (12) including data on the shape of an object (1), a shape data dividing step (B) for dividing the external data into cubic shape cells (13) the boundary faces of which are mutually perpendicular by octal tree division and storing the shape data for each shape cell, and a physical quantity dividing step (C) of octal−tree−dividing each of the physical quantities of the object into physical quantity cells (13’) and storing the physical quantity for each physical quantity cell. The shape cells (13) and the physical quantity cells (13’) of each physical quantity are stored in respective storage layers (18) in the same coordinate system, related to each other, and managed. By using one or a combination of the storage layers (18), the data on the shape and physical quantities are used.

公开(公告)号：EP1624394A4

公开(公告)日：2006-12-13

申请号：EP04732016

申请日：2004-05-10

Applicant: RIKEN

Inventor： KATO MASAYA ,  KASE KIWAMU ,  YAMADA TOMONORI

IPC: G06F17/50

CPC classification number: G06F17/5018

Abstract: A method for identifying multimedia data comprising an external data acquisition step (S1), an external data input step (A), a cell division step (B), a cell sectioning step (C), a space sectioning step (D), a simulation step (S3), and an output step (S4). In the cell sectioning step (C), a boundary cell (13a) is sectioned into a cell having a cut point where an edge line or a vertex is cut by boundary data and a cell that is the larger one of the cells in different layers toughing each other and having a cut point at a part touching the cell of the different layer, and a medium number is attached to each cell vertex.

公开(公告)号：EP1418479A4

公开(公告)日：2006-07-05

申请号：EP02758845

申请日：2002-08-14

Applicant: RIKEN

Inventor： OHMORI HITOSHI ,  ANZAI MASAHIRO ,  KASE KIWAMU ,  TASHIRO HIDEO ,  MAKINOUCHI AKITAKE

IPC: G05B19/4097 ,  B29C67/00

CPC classification number: G05B19/4097 ,  G05B2219/35097 ,  G05B2219/35098 ,  G05B2219/35145 ,  G05B2219/35167 ,  G05B2219/45204 ,  Y02P90/265

Abstract: External data (12) consisting of the interface data of an object (1) is divided by octtree dividing into rectangular parallelepiped cells (13) having interface planes crossing perpendicularly, and V-CAD data that classify the divided cells into internal cells (13a) located inside the object and interface cells (13b) including interface surfaces is prepared, and die data and die machining data for producing the object (1) are generated from data on reference surfaces at least partially contacting the object (1)and the V-CAD data. Die machining data is used to select a plurality of machining tools (2) in the order of decreasing size according to the sizes of internal cells (13a) in a machining unit to move the machining tools (2) within the planes and the thickness directions of the die to thereby machine the die. Therefore, V-CAD data used can simplify a die-machining NC machining program and significantly reduce a die machining time.

公开(公告)号：EP1314540A4

公开(公告)日：2003-05-28

申请号：EP01954339

申请日：2001-07-26

Applicant: NTT DATA CORP ,  RIKEN

Inventor： WATANABE KATSUYUKI ,  NAKAJIMA KOJI ,  YAMAZAWA KENJI ,  ANZAI MASAHIRO ,  KASE KIWAMU

IPC: B29C67/00 ,  C08K7/20 ,  C08L101/00

CPC classification number: B29C64/135 ,  B29K2995/0073 ,  Y10T428/24901

Abstract: In forming a colored shaped article from a curable resin, the addition of either a single colorant or two or more colorants can be conducted without fail to produce a coloring effect without fail. A liquid, colorless, photocurable resin is irradiated with a laser light and cured to form a lowermost layer 5n. A liquid photocurable resin is applied to the upper side thereof to form a colored layer 5n-1 composed of a cured colorless region and a liquid pond region. A color ink is dropped to the liquid pond region. The liquid pond region is irradiated with a laser light to cure it to the same degree as the colorless region. A block-form coating film having a given thickness is formed from a sheet-form coating film of the color ink with which the pond region is covered. Due to the constitution, formation of the subsequent layer (colored layer 5n-2) on the colored layer 5n-1 can be conducted without any trouble. This process is repeated to form a colored layer 5n-2 to a colored layer 53 and to form a colored layer 52 on the colored layer 53. Furthermore, an uppermost layer 51 is formed on the colored layer 52.