JP4804501B2 - Wire harness wiring shape display device - Google Patents

Description

The present invention regards a wire harness routed by being restrained at a distance from each other by a restraining tool, and that a beam element as an elastic body is interposed between each of the nodes set on the center line. Then, using the finite element method, create a line-shaped analysis model that defines the wiring shape between the restraint positions using the physical property data, shape data, and constraint conditions of the wire harness as the analysis conditions. The present invention relates to a wiring shape display device for a wire harness that displays a wiring shape on a screen of a display unit by a column of cylinders having a corresponding outer diameter and a length defined by a node position.

  In Patent Document 1, a wire composed of a plurality of wire rods is regarded as an elastic body in which a plurality of beam elements whose linearity is maintained in a circular cross section is combined, and calculation using a finite element method by a computer is performed. A method for predicting a movable range of a wire routed at a predetermined position, in a predetermined direction with respect to a node that is a connection point of a plurality of beam elements other than a restrained portion in a stable wire. Disclosed is a method for predicting the movable range of a wire-like structure that uses a finite element method to calculate the movable range of a wire when a predetermined force is applied so as to satisfy the shape characteristics, material characteristics, and constraint conditions of the wire. Yes.

  That is, with respect to the wire harness clamped at both ends, with the restraint position and direction as restraint conditions, the node or beam element translates in three axes and has six degrees of freedom around the three axes according to the hook law. In other words, assuming that there are 12 degrees of freedom at each node of each beam element, the shape characteristics of the length and cross-sectional area of the wire harness and the cross-sectional area, cross-sectional moment of inertia, density, longitudinal elastic modulus and transverse elastic modulus of the beam element It is assumed that a relationship corresponding to a force vector of 12 rows is established by a product of a stiffness vector of 12 rows and 12 columns corresponding to material characteristics and a displacement vector of 12 rows of translation and rotation. Then, for a wire harness in which three or more nodes are continuous, on the premise that the forces in each three-dimensional direction of each node are balanced, the routing path function corresponding to the hook law of the following equation (1) The wiring route of the wire harness is analyzed.

[K] {x} = {F} (1)
Here, K: rigidity vector calculated or measured based on the above-described shape characteristics and material characteristics and corresponding to the above-described spring constant, x: displacement vector, F: force vector.

According to Patent Document 2, the present applicant can create such image data by simple graphic data processing when displaying the wiring shape of the wire harness in a corresponding cylindrical shape in the three-dimensional virtual space of the display screen. For the wire harness, the three-dimensional position of each node is analyzed by the finite element method for the analysis model consisting of the node group set on the center line, and the routing shape between the constraint positions In the wiring shape display method of the wire harness that creates the analysis model data that defines the wiring shape and displays the wiring shape in the three-dimensional virtual space on the screen of the display unit in response to the analysis model data, a predetermined number of nodes Create cylindrical row data that defines the unit cylinder corresponding to the vertical width corresponding to the interval of the wire and the outer diameter of the wire harness, and in sequence between a predetermined number of nodes of the analysis model data By positioning the central axis of the unit cylinder in order on the straight line, cylindrical analysis model data by the cylinder row is created, and this cylindrical analysis model data is transferred to the projection plane corresponding to the screen of the display unit. We proposed a method for displaying the wiring shape of the wire harness that converts the projected cylindrical row projection image into the cylindrical row projection data, and displays the routing shape between the restraint positions on the screen in response to this cylindrical row projection data. .
JP 2004-119613 A JP 2007-80132 A

  According to the above-mentioned patent document 2, the wiring shape is simulated to a cylindrical three-dimensional shape according to the analysis result of the wiring shape based on the analysis model of the center line of the wire harness by the finite element method, and is displayed on a two-dimensional screen. When displaying graphics, converting cylindrical deformation analysis model data that simply defines the arrangement position of the cylinders in turn into projection data eliminates the need for curve processing at the graphic processing stage, thus reducing the memory capacity. .

  In this case, it is necessary to individually store the three-dimensional position data of the unit cylinder length, and if the length of the cylinder is correspondingly increased with respect to the linear arrangement shape, the memory capacity can be further reduced. .

In view of these points, the present invention determines the length of the cylindrical shape in the vertical direction when displaying the wiring shape of the wire harness on the display screen imitating the cylindrical three-dimensional shape. It is an object of the present invention to provide a wiring harness wiring shape display device that can be varied according to curvature.

In order to achieve this object, the present invention provides an elastic body between each of a group of nodes set on the center line of a wire harness routed by being restrained at a distance from each other by a restraining tool. Assuming that the beam element is intervening, a line-shaped analysis model that defines the routing shape between the constraint positions is created using the finite element method using the physical property data, shape data, and constraint conditions of the wire harness as an analysis condition. In the wiring shape display device of the wire harness that displays the wiring shape on the screen of the display unit by a column of cylinders having an outer diameter corresponding to the wire harness in response to the model and a length defined by the node position, the claim 1, to perpendicular to the first projection analysis model and a first plane which is projected on the first plane defined analytical model coordinate axes of the three-dimensional coordinate system for the analysis First and second model projection conversion means for projecting and converting to a second projection analysis model projected onto the second plane, and tangent data for defining tangents at each node of the first and second projection analysis models are created, respectively. A reference table that defines the number of nodes that allow linearization between nodes with respect to the added angle difference obtained by adding the angle differences calculated in order between the tangents of adjacent nodes For each of the first and second projection analysis models, the angle difference is calculated in order from the analysis start point side, and the reference table is added to the added addition angle difference. By referring to the first and second provisional linearization node numbers for setting the first and second provisional linearization node numbers for straightening between the nodes, first and second provisional linearizations set in order Number of nodes An arrangement line data creation means for creating an arrangement line data for creating a continuous line line data for straightening between the nodes of the number of nodalization nodes in order, with the smaller number of nodalization nodes, and an arrangement line data Create cylindrical column data defining a cylindrical column of a cylindrical group having a length defined by each linear line data and an outer diameter corresponding to the wire harness with the straight line defined by each linear line data as a center line, Cylindrical row image data creating means for creating cylindrical row image data by converting the cylindrical row data into projected cylindrical row data corresponding to the viewing angle with respect to the arrangement shape.

Alternatively, according to claim 2, the analysis model is projected onto the first plane that is projected on the first plane defined by the coordinate axes of the three-dimensional coordinate system for analysis and the second plane that is orthogonal to the first plane. Three or more first and second model projection conversion means for performing projection conversion to the second projection analysis model, and the first and second projection analysis models within a range in which the curvature falls below a predetermined value in order from the analysis start point side. Arc data creating means for creating arc data defining first and second arcs approximately including the maximum number of nodes, and the number of nodes constituting each of the first and second arcs created in order A node number judging means for judging which one is less and setting the smaller one as the number of straightened nodes, and a straight line for straightening between the nodes of the number of straightened nodes according to the number of straightened nodes set in order Create line data in order and continuously The distribution line data creating means for creating the distribution line data to be generated, and the length and the wire harness corresponding to the length defined by each straight line data with the straight line defined by each straight line data of the wiring line data as the center line Cylindrical column that creates cylindrical column image data by creating cylindrical column data that defines the cylindrical column of a cylinder group having an outer diameter, and converting this cylindrical column data into projected cylindrical column data according to the viewing angle with respect to the routing shape Image data creating means.

Alternatively, according to claim 3, tangent vector data creating means for creating tangent vector data for defining a tangent vector in the three-dimensional coordinate system for analysis model analysis for each node of the analysis model, and tangents of adjacent nodes from the analysis start point side For each vector, the vector difference between the vector components is calculated in order, and the vector difference addition means for sequentially adding the vector differences of the vector components in the largest coordinate axis directions, and the straight line between the nodes for the added vector difference Reference table storage means for storing a reference table that defines the number of nodes allowed to be converted, and the analysis starting point for the number of linearized nodes that linearizes between nodes by referring to the reference table for the added vector difference The number of nodes to be set in order from the side and the number of straightened nodes set in order are included in this number of straightened nodes. Creating the line data that creates the line data that creates the line line between the nodes in order and making it continuous, and the line line defined by each line line data as the center line Create cylindrical column data that defines the cylinder row of the cylinder group having the length specified by each straight line data and the outer diameter corresponding to the wire harness, and project this cylindrical row data according to the viewing angle with respect to the routing shape Cylindrical row image data creating means for creating cylindrical row image data by converting into row data.

According to the invention of claim 1 or claim 2, for projection analysis model into orthogonal two-dimensional plane for arranging the wire harness in a three-dimensional space, the tangential data or arc data is created, according to claim 3 According to the invention , direct tangent vector data is created for a line-shaped analytical model for a wire harness arranged in a three-dimensional space.

According to the first to third aspects of the present invention, the routing shape is graphically displayed by the cylindrical row in accordance with the routing shape analysis result based on the analysis model of the center line of the wire harness by the finite element method. In addition to eliminating the need for curve processing in the entire length direction at the processing stage, the memory capacity is greatly reduced, and by extending the cylinder length according to the curvature of the routing shape, the memory capacity is further increased. Can be reduced. In that case, according to the invention of claim 1 or claim 2, by determining the number of linearized nodes based on the projection analysis model of the analysis model analyzed on the three-dimensional coordinate system onto the orthogonal two-dimensional plane. In addition, it is possible to ensure display accuracy by linearizing a region where the curvature of the wiring shape increases depending on the viewing angle for the wire harness routed in the three-dimensional space.

A wire harness routing shape display device according to an embodiment of the present invention will be described with reference to FIGS. As shown in FIG. 7, this apparatus uses a personal computer 1, and further includes a display unit 2, a keyboard 3 and mouse 4 as input units, and an input / output disk drive 6 in which a recording medium such as a CD is set. Etc. and an input / output unit 5 such as the above are attached.

  The personal computer 1 functions to include the following means by operating a built-in memory, CPU and the like by a program for analyzing the wiring shape of the wire harness (W / H) read by the disk drive 6. That is, a three-dimensional model of the W / H routing shape taken directly through the disk drive 6 or from the CAD device, its W / H length / outer diameter, coordinate values of each restraint position, CAD data storage means 19 for storing CAD data such as shape data, each constraint direction, physical property data of W / H, etc., and CAD data necessary for analysis of the routing shape by the finite element method and especially physical properties are input operations. The analysis condition setting means 12 that takes in the input analysis condition and sets the condition, and based on the analysis condition, the center line of the W / H routed by constraining at intervals with the restraint tool in order. An analysis model M1 that defines the routing shape between the restraint positions on the three-dimensional coordinate system for analysis corresponding to the CAD three-dimensional coordinate system is created for each node with respect to the line-shaped model composed of the nodes along the line. Routing A routing image data creation unit 10 that creates routing shape image data for displaying a routing shape by a cylindrical group whose cylindrical length changes according to the curvature of the routing shape in response to the analysis model 13 And display control means 11 for displaying the routing shape between the restraint positions in response to the cylindrical row image data which is the routing shape image data on the screen 2a.

  For example, as shown in FIG. 2, the routing shape analyzing means 13 is completely constrained by a connector CN1 on the back side of an automobile instrument panel, completely constrained by a clip CL1 in the middle, and further completely clipped by a clip or the like in the subsequent region. For the wire harness 9 that is constrained and routed, the three-dimensional coordinate values of the node groups b0, b1, b2, b3,... Torsion in which forces are balanced with each other at each node based on the routing path function according to the above equation (1) using the material properties such as second moment, density, longitudinal elastic modulus, transverse elastic modulus, and restraint position / direction as analysis conditions. By analyzing the three-dimensional position resulting from the amount of rotation and translation, a line-shaped analysis model M1 (FIG. 3C) that defines the routing route is created in the three-dimensional coordinate system for analysis. .

  As shown in FIG. 1, the layout image data creation unit 10 converts the analysis model M1 into an XZ plane projection analysis model (FIG. 3A) defined by the coordinate axes of the analysis three-dimensional coordinate system and an orthogonal XY plane projection analysis model. Model projection conversion means 20 and 20a for conversion to (FIG. 3B) and nodes K0, K1, K2, K3...; K0, k1,. for tangential data T0, T1, T2, T3... defining tangents corresponding to the curves of the projection analysis model at k2, k3. The surface tangent data creation means 21, 21 a and the number of allowable nodes that allow linearization between successive nodes are referred to the added angle difference obtained by sequentially adding the angle differences calculated in the order between the tangents of adjacent nodes. Reference table For each of the table storage means 22 for storing (refer to FIG. 5) and the XZ plane and XY plane projection analysis models, the angle difference is calculated in order from the analysis start point side node to the analysis end point side node and added in order. In addition, by referring to the above-mentioned reference table for the added addition angle difference, the XZ plane and the XY plane for setting the number of provisional linearization nodes of the XZ plane and the XY plane that linearize between consecutive nodes are set. Of the provisional linearization nodes set in order for the respective node number setting means 23 and 23a and the XZ plane and XY plane projection analysis models, the smaller provisional linearization node number is set as the normal linearization node number. Then, straight line data for straightening between the nodes of the analysis model M1 from the analysis start point side is created in order, and the wiring line data for defining the wiring line by these continuous straight line data groups. And a line group of cylinders having a length defined by each straight line data and an outer diameter corresponding to the wire harness. Cylindrical column data that defines the cylindrical column is created, and this cylindrical column data is converted into projected circular column data that defines the shape of the cylindrical column projected in the direction according to the viewing angle specified by the input / output unit 5 for the routing shape. Cylindrical row image data creating means 25 for converting and creating cylindrical row image data is provided.

  The reference table of the table storage means 22 sets the cylinder length that allows linearization to be longer as the addition angle difference is smaller. Therefore, when the angle difference between the nodes is increased, the addition angle difference is limited so as to limit linearization accordingly. And the number of allowable nodes that should be restricted accordingly.

  The XZ plane node number setting means 23 performs the following process according to the procedure described in FIG. As for the node group points K0, K1, K2, K3,... Projected from the node groups b0, b1, b2, b3,... As shown in FIG. The vicinity of the node b0 will be described. The angle difference (T0−T1) between the tangent lines T0 and K1 of the node K0 is calculated as 5 °, for example, and the angle difference between adjacent nodes is calculated in the following order from the start point side. Add in order. By referring to the reference table of FIG. 5 for this 5 °, the allowable number of nodes is determined to be infinite, and the angle difference (T1−T2) between the next nodes K1 and K2 is added by 16 °. When the addition angle difference is 21 °, it is determined that the allowable number of nodes is 5 (allowable cylinder length: 8 mm). Hereinafter, the angle difference (T2−T3) is 2 °, the addition angle difference is 23 ° and the allowable number of nodes is 5. Subsequently, the angle difference (T3−T4) is 3 °, and the addition angle difference is 26 °. It is determined that the number of nodes is 4 (allowable cylinder length: 6 mm), and the number of added nodes is less than 5 (added cylinder length: 8 mm) from the addition start point at that time. From 4 to T3, the number of straightening nodes 4 in which the straightening allowable range is set is set.

  On the other hand, the XY plane node number setting means 23a performs the same processing on the node group points k0, k1, k2, k3,... Of the XY plane projection analysis model, and as shown in FIG. By referring to the reference table of FIG. 5 for the angle difference (t0−t1) 8 ° between the tangent vectors t0 and k1 between the tangent vectors t1 and t1, the allowable number of nodes is determined to be infinite, and between the next nodes k1 and k2. The angle difference (t1−t2) of 30 ° is added, and the added angle difference is determined to be 4 permissible nodes when the angle difference is 38 °. Hereinafter, the angle difference (t2−t3) is 7 °, the added angle difference is 45 °, the allowable number of nodes is 3, and the number of added nodes is less than 4 at that time, and linearization is not allowed. After one step, the number of straightening nodes 3 that allows straightening from the nodes t0 to t3 is set.

  As a result, the routing line data creating means 24 responds to the number of straightening nodes 3 for the XY plane, which is smaller than the number of straightening nodes 4 for the XZ plane, as shown in FIG. Is generated as a straight line data LD1 (FIG. 4C).

  Next, the node number setting means 23 for the XZ plane newly sets the allowable node number to infinity with respect to the addition angle difference of 3 ° for the remaining nodes K3, K4, K5. The same process is performed, and when the allowable node number 5 is reached at the node K6, the provisional linearized node number 5 is set in accordance with the addition node number 5. Also in this case, assuming that the number of provisional straightening nodes on the XY plane having a large curvature is limited to four, straight line data LD2 for straightening the nodes b2 to b5 is created using this as the number of straightening nodes.

  In the area of the nodes b20 to b30 in which straight line data is created in the following order and the arrangement of the substantially straight line continues, as shown in FIG. 6, the angle difference of the node K20 on the XZ plane is 2 ° and includes a negative angle difference. When the angle difference (T29-T30) of 3 ° is calculated at the node K29, the added angle difference of 17 ° becomes the allowable number of nodes 5 (allowable cylinder length 8 mm), and the actual number of nodes 11 at that time is reduced. By turning around, linearization is not allowed, and a provisional linearization node number of 10 corresponding to nodes K20 to K29 is set after returning one step. Similarly, if the number of straightening nodes 13 is determined for the remaining nodes k20, k21... Of the projection analysis model on the XY plane, the straight line data LDn (in response to the smaller number of provisional straightening nodes 10). FIG. 3C) is created. Further, the routing line data between the nodes b50 corresponding to the position of the clip CL1 is created, and then the analysis between the next constraint points is performed.

  The cylindrical row image data creation means 25 takes in the cylindrical diameter data and the like from the CAD data storage means 19 and sets the straight line data LD1, LD2... LDn. The length of the cylinder group corresponding to the length defined by the straight line data and the outer diameter of the wire harness 9 is defined, and the plane of the cylinder row data in the direction corresponding to the viewing angle with respect to the installed shape, that is, the input / output unit 5 For example, the cylindrical row image data is created by converting the cylindrical row data defining the projection shape obtained by projecting the cylindrical row onto the XZ plane, the XY plane, or an arbitrary inclined plane with respect to this. The display control means 11 stores the cylindrical row image data in the display data storage unit 10a, and displays the arranged shape image in the designated range in the three-dimensional virtual space of the screen 2a of the display unit 2. The surface of each cylinder is colored, and its end faces perpendicular to each other are displayed separately by changing the brightness, and further, a shadow with respect to parallel light from the projection direction can be displayed by changing the brightness. Each cylindrical surface is displayed with an outline without being colored, and coloring is not limited to color, but may be based on gray scale.

  The operation of the W / H routing shape analyzer configured as described above will be described with reference to the flowchart of FIG. In the personal computer 1, a desired stored data such as the W / H9 CAD data shown in FIG. 2 is selected by the input operation of the keyboard 3 or the mouse 4 to analyze the wiring shape analysis model M1. Let

  Thereby, an XZ plane projection analysis model in which the analysis model M1 is projected onto the XZ plane that is the first plane and an XY plane projection analysis model that is projected onto the XY plane that is the second plane orthogonal to the plane are created by projection conversion. (S1). Further, if display of a region between desired constraint positions CN1 and CL1 is instructed, the lines at the nodes K0, K1, K2, K3...; K0, k1, k2, k3. Tangent data defining tangent lines T0, T1, T2, T3...; T0, t1, t2, t3. For each projection analysis model, the angle difference between the tangents of the adjacent nodes from the node K0; k0 on the analysis start point side, which is a constraint point, is calculated in order, and added to calculate the added angle difference (S3).

  In this addition process, for each projection analysis model, the addition angle difference and the number of addition nodes from the start of the addition operation causing the addition angle difference are collated based on the collation table (FIG. 5). ... Are set in order, and the smaller one is set as the normal number of linearized nodes, so that the linearized nodes from the analysis start point side are set. Scores 3, 4... 21... Are set in order (S4).

  In response to the number of straightening nodes set in this order, straight line data for straightening between the nodes is created in order, and the line data is arranged in the straight line data groups LD1, LD2,. Is created (S5). Cylindrical row image data defining the projection shape corresponding to the viewing angle corresponding to the length corresponding to each straight line of the routing line data and the outer diameter of the wire harness 9 is created, and the routing shape corresponding to the viewing angle Are displayed in a cylindrical row (S6).

  Thereby, the nodes b0, b1, b2... Of the analysis model M1 are displayed on the screen 2a, imitating the three-dimensional shape of the cabling shape corresponding to the circular cross section of the wire harness 9. The one with the larger curvature even if the viewing angle is changed on the screen 2a and the apparent curvature changes because the routing line data is created based on the projection analysis model for the XZ plane and the XY plane. It is displayed in a cylindrical row of cylinder length.

  FIG. 9 exemplifies another W / H curved state, and in the present invention, a cylindrical row whose length changes according to the degree of curvature in contrast to a conventional isometric cylindrical row (FIG. A). The display according to FIG.

  When W / H is routed along a plane, the node group can be directly analyzed without projecting the analysis model M1 into two orthogonal planes.

FIG. 10 to FIG. 12 show another embodiment of the layout image data creation unit 10, and model projection for converting the analysis model M1 and creating the XZ plane projection and XY plane projection analysis model as described above. For each projection analysis model in the range specified by the conversion means 39, 39a and the input / output unit 5 of both projection analysis models, the maximum number of 3 or more in a range where the curvature falls below a predetermined value in order from the analysis start point side. Which of the arc data creation means 30 and 30a for creating arc data that prescribes an arc approximately including the number of nodes and the number of nodes constituting the arc that is created in order on the XZ plane and the XY plane is smaller the number of nodes determination means 31 for setting a lesser judges as linearized number of nodes, in response from the analysis start point side to the set linearized clause points toward the analysis end point connecting between the nodes in a straight line linearly Rainde The distribution line data creating means 32 for creating the distribution line data for defining the distribution line by these straight line data groups, and the straight line data of the distribution line data as the center line, In addition, the cylindrical row data defining the cylindrical row of the cylindrical group corresponding to the length defined by each straight line data and the outer diameter of the wire harness 9 is created, and this cylindrical row data is set according to the viewing angle with respect to the routing shape. Cylindrical row image data creating means 33 for creating cylindrical row image data by performing projection conversion so as to define the shape of the cylindrical row projected in the direction.

  The cylindrical row image data creation means 33 is configured in the same manner as the above-described cylindrical row image data creation means 25, and the arc data creation means 30 is composed of the node groups b0, b1, b2, As shown in FIG. 11, for the nodes K0, K1, K2, K3... on the projected XZ plane of b3..., the nodes are sequentially taken from the analysis start point side, and the vicinity of each node is set to a node interval of 2 mm. On the other hand, a predetermined position error in the direction of the center of curvature, for example 0. First, an arc R1 (A in the figure) is set for the nodes K0 to K3 so as to pass through as many nodes as possible within an allowable range of several millimeters and to have a curvature within the allowable value. As such an arc, for example, an arc including three continuous nodes is set, and the number of the arcs is increased in order at the center of curvature or in a predetermined vicinity thereof to change the curvature, thereby setting an arc passing through the closest position.

  On the other hand, the XY plane routing line data creation means 30a also performs the same processing on the XY plane, and sets the allowable curvature arc r1 (B in the figure) for the nodes k0 to k2. The number-of-nodes determining means 31 sets three of the arcs R1, r1 having the smaller number of nodes as linearized nodes. The routing line data creation means 33 creates straight line data LD11 (C in the figure) for straightening between the node groups b0 and b2 from the analysis start point side. Next, when the number of linearized nodes 4 having a smaller number than the arc R2 of the XZ plane is created by the arc r2 defined by k2 to k5 of the XY plane having a large curvature, the routing line data LD12 is created, The routing line data is created according to the linearized nodes set in order. Further, for the subsequent node groups K2, K4, K5..., K2, k4, k5..., Arc data including the maximum number of nodes in the allowable curvature range is created in order, and the smaller number each time. Set as a straight node.

  The operation will be described with reference to FIG. The analysis model M1 is projected and converted into a projection analysis model for the XZ plane and for the XY plane (S11). With respect to the projection analysis model for the XZ plane and the XY plane, if the areas of the connector CN1 and the clip CL1 in FIG. 2 are specified, three or more in a range that falls below a predetermined curvature value that allows linearization from the analysis start point side. Arc data R1, r1, R2, r2,... That define an arc that approximately includes the maximum number of nodes is created (S12). By determining the smaller of the number of nodes constituting the arc data as the number of straightened nodes, the number of straightened nodes 3, 4,... Is set in order from the analysis start point side (S13). . In response to the number of linearized nodes set in order, linear line data for linearizing the nodes allowed to be linearized is created in order, and the linear line data groups LD11, LD12,... Thus, the routing line data is created (S14).

  This routing line data is projected by the cylindrical row image data creation means 33 in accordance with the length corresponding to each straight line and the outer diameter of the wire harness 9, and in accordance with the viewing angle designated by the input / output unit 5. Cylindrical row image data is created, and the cabling shape corresponding to the circular cross section of the wire harness 9 corresponding to the analysis model M1 is displayed in a three-dimensional virtual space imitating a three-dimensional shape. (S15). The one with the greater curvature even if the viewing angle is changed on the screen 2a and the apparent curvature changes because the routing line data is created based on the projection analysis model for the XZ plane and the XY plane. It is displayed in a cylindrical row of cylinder length.

Each of the embodiments described above is based on the assumption that the analysis model M1 is analyzed in the three-dimensional coordinate system. However, when the analysis model M1 is analyzed in the two-dimensional coordinate system, or the analysis in the three-dimensional coordinate system is performed. If the viewing angle is limited even if it is assumed, it is also possible to create straight line data directly from the node data without converting the analysis model M1 into a projection analysis model.

  FIGS. 13 to 17 show still another embodiment of the arrangement image data creation unit 10, and each node b0, b1, b2, b3,... In the range designated by the input / output unit 5 of the analysis model M1. .. tangent vector data creating means 40 for creating tangent vector data V0, V1, V2, V3... In the three-dimensional coordinate system X, Y, Z for analysis model analysis, and the adjacent nodes from the analysis start point side A vector difference adding unit 41 that sequentially calculates a vector difference between the vector components for the tangent vector and sequentially adds vector differences of vector component differences in the largest coordinate axis directions X, Y, and Z, and an added vector difference Table storage means 42 for storing a reference table (FIG. 14) that defines the number of nodes that allow linearization between consecutive nodes, and from the analysis start point side node to the analysis end point side Calculate the vector differences in order toward the points, add them in order, and refer to the aforementioned reference table for the added vector differences, thereby analyzing the number of linearized nodes that linearize between consecutive nodes. In response to the number of nodes set in order from the side and the number of linearized nodes set in order, straight line data for straightening between the nodes is created, and these continuous line data groups The routing line data creating means 44 for creating the routing line data that defines the routing line, and the length defined by each straight line data with the straight line defined by each straight line data of the routing line data as the center line The cylindrical column data of the cylinder group that defines the cylindrical column corresponding to the length and the outer diameter of the wire harness 9 is created, and this cylindrical column data is projected cylindrical column according to the viewing angle with respect to the routing shape And a cylindrical column image data creating means 45 for creating a cylindrical column image data by converting the over data.

  The cylindrical row image data creation unit 45 is configured in the same manner as the above-described cylindrical row image data creation unit 25, and the node number setting unit 43 performs the following processing according to the procedure described in FIG. As shown in FIG. 16, the largest vector difference (V0−V1) among the three axial directions between the tangent vector V0 of the node b0 and the tangent vector V1 of the node b1 is calculated as 0.12, and is adjacent in the following order. The angle difference between the nodes is calculated and added sequentially from the start point side. The vector can be defined by the respective scalar values in the three axis directions. By referring to the table (FIG. 15) for this 0.12, the allowable number of nodes allowed to be linearized is determined to be infinite, and therefore the vector difference (V1−V2) 0. 17 is added, and the added vector difference of 0.29 is determined to be 5 allowable nodes (allowable cylinder length: 8 mm). Hereinafter, the vector difference (V2−V3) is 0.1, the added vector difference is 0.39, and the allowable number of nodes is 4, which coincides with the actual number of added nodes 4 (added cylinder length 6 mm) at that time. The number of linearized nodes 4 that allows the conversion is set.

  Next, when the vector difference (V3−V4) 0.08 between the next nodes b3 and b4 is added to the vector difference (V4−V5) 0.09 between the nodes b4 and b5, the allowable number of nodes is 5 Is set. Further, the vector difference (V5−V6) 0.09 between the nodes b5 and b6 is added to obtain an addition vector difference of 0.25, and then the vector difference (V6−V7) 0.08 between the nodes b6 and b7 is At the time of addition, linearization is not permitted because the allowable number of nodes 4 falls below the actual number of nodes 5, and the number of linearized nodes 4 corresponding to the nodes b3 to b6 is set after going back one step. .

  As a result, the routing line data creation means 44 responds to the number of linearized nodes 4, 4... Set in order from the node on the analysis start point side, in response to the straight line data LD21, LD22. .. Are created in order, and the cylindrical row image data creating means 45 is caused to create cylindrical row image data.

The operation will be described with reference to FIG. Similarly, assuming that the areas of the connector CN1 and the clip CL1 in FIG. 2 are indicated, the tangent vectors V0, V1, V2, V3,... In the three orthogonal directions at the nodes b0, b1, b2, b3. A tangent vector data tangent defining... Is created (S21). The largest axial vector difference between the tangent vectors of the adjacent nodes from the analysis start point side is calculated in order, and the added vector difference is calculated (S22). The added vector difference is checked against the actual number of nodes generating the added vector difference on the basis of the matching table (FIG. 14), and a straight line in the range of the number of nodes allowed to be linearized according to the added vector difference. The number of conversion nodes is set in order from the analysis start point side (S23 ). Each time the number of linearized nodes is set, in response to the number of linearized nodes 4, 4... Set in order for the subsequent node group, the nodes of this number of linearized nodes are linearized. Straight line data LD21, LD22,... Are created in order (S24). Cylindrical column data defining a cylindrical column corresponding to the length corresponding to each straight line and the outer diameter of the wire harness 9 is created, and the routing shape corresponding to the viewing angle is displayed in the cylindrical column (S25).

  As a result, the wiring shape that is fleshed in a cylindrical shape corresponding to the circular cross section of the wire harness 9 corresponding to the analysis model M1 is displayed on the screen 2a while imitating the three-dimensional shape without projecting the analysis model M1. The

It is a figure explaining the structure of the wiring image data preparation part which is the principal part of the wiring shape wiring shape display apparatus by embodiment of this invention. It is a perspective view which shows partially the wiring shape of the wire harness used as the analysis object of the same apparatus. It is a figure explaining the analysis model of the routing shape of the apparatus. It is a figure explaining operation | movement of the apparatus. It is a figure explaining the content of the search table of the same apparatus. It is a figure explaining the operation | movement step of the same apparatus. It is a figure explaining the whole structure of the apparatus. It is a flowchart explaining operation | movement of the apparatus. It is a figure which illustrates the image of the wiring shape by the same apparatus. It is a figure explaining the structure of the layout image data preparation part by another embodiment of this invention. It is a figure explaining operation | movement of the layout image data preparation part by FIG. It is a flowchart explaining the operation | movement of the layout image data preparation part by FIG. It is a figure explaining the structure of the layout image data preparation part by another embodiment of this invention. It is a figure explaining the content of the search table of the layout image data preparation part by FIG. It is a figure explaining the operation | movement step of the layout image data preparation part by FIG. It is a figure explaining operation | movement of the layout image data preparation part by FIG. It is a flowchart explaining the operation | movement of the layout image data preparation part by FIG.

DESCRIPTION OF SYMBOLS 1 Personal computer 2 Display part 5 Input / output part 9 Wire harness b0, b1, b2 ... Node CL1 Clip as restraint tool CN1 Connector as restraint tool K0, K1, K2, ...; k0, k1, k2, ... Projected nodes M1 analysis model T0, T1, T2, T3 ...; t0, t1, t2, t3 ... Tangent V0, V1, V2, V3 ...... Tangent vector

Claims (3)

For wire harnesses that are routed by being restrained at a distance from each other by restraints, it is assumed that a beam element as an elastic body is interposed between each of the nodes set on the center line, and a finite element Create a line-shaped analysis model that defines the wiring shape between the restraint positions using the physical property data, shape data, and constraint conditions of the wire harness as analysis conditions by the method, and respond to this analysis model with the outer diameter corresponding to the wire harness And in the wiring shape display device of the wire harness for displaying the wiring shape on the screen of the display unit by the column of the cylinders defined by the node positions,
A first projection analysis model in which the analysis model is projected onto the first plane defined by the coordinate axes of the analysis three-dimensional coordinate system, and a second projection analysis in which the analysis model is projected onto the second plane orthogonal to the first plane. First and second model projection conversion means for projecting into a model, and first and second tangent data for creating tangent data defining tangents at each node of the first and second projection analysis models, respectively. And a table storage means for storing a reference table that defines the number of nodes that allow linearization between the nodes with respect to the added angle difference obtained by adding the angle differences calculated in order between the tangents of the adjacent nodes. For each of the first and second projection analysis models, an angle difference is calculated in order from the analysis start point side and added in order, and a reference table is referenced for the added angle difference. The first and second provisional node number setting means for setting the first and second provisional linearization node numbers for straightening between the joints, and the first and second provisional provisions set in order. Create the line data to create the line data to create the continuous line line data to make the straight line between the nodes of the number of straight line nodes in order. A cylindrical row of cylinders having a length defined by each straight line data and an outer diameter corresponding to the wire harness with a straight line defined by each straight line data of the routing line data as a center line Cylindrical column image data creating means for creating cylindrical column data to be defined and converting the cylindrical column data into projected cylindrical column data corresponding to the viewing angle with respect to the routing shape to create cylindrical column image data. Wiring shape display device of the wire harness, wherein the door. For wire harnesses that are routed by being restrained at a distance from each other by restraints, it is assumed that a beam element as an elastic body is interposed between each of the nodes set on the center line, and a finite element Create a line-shaped analysis model that defines the wiring shape between the restraint positions using the physical property data, shape data, and constraint conditions of the wire harness as analysis conditions by the method, and respond to this analysis model with the outer diameter corresponding to the wire harness And in the wiring shape display device of the wire harness for displaying the wiring shape on the screen of the display unit by the column of the cylinders defined by the node positions,
The first projection analysis model in which the analysis model is projected onto the first plane defined by the coordinate axes of the analysis three-dimensional coordinate system, and the second projection analysis model in which the analysis model is projected onto the second plane orthogonal to the first plane The first and second model projection conversion means for performing projection conversion to the first and second projection analysis models, and the maximum number of nodes of three or more in a range in which the curvature falls below a predetermined value in order from the analysis start point side. Arc data creating means for creating arc data defining the first and second arcs approximately including the number of points, and the number of nodes constituting each of the first and second arcs created in order A node number determining means for determining whether there are few nodes and setting the smaller one as the number of nodes to be linearized, and a straight line for straightening between the nodes of the number of nodes to be linearized according to the number of nodes to be linearized in order Create line data in order A distribution line data generating means for generating continuous distribution line data, and a length defined by each straight line data with a straight line defined by each straight line data of the wiring line data as a center line And cylindrical row data defining a cylindrical row of a group of cylinders having an outer diameter corresponding to the wire harness is created, and this cylindrical row data is converted into projected cylindrical row data corresponding to the viewing angle with respect to the routing shape to obtain cylindrical row image data A wire harness routing shape display device comprising: a cylindrical row image data creating means for creating a wire harness. For wire harnesses that are routed by being restrained at a distance from each other by restraints, it is assumed that a beam element as an elastic body is interposed between each of the nodes set on the center line, and a finite element Create a line-shaped analysis model that defines the wiring shape between the restraint positions using the physical property data, shape data, and constraint conditions of the wire harness as analysis conditions by the method, and respond to this analysis model with the outer diameter corresponding to the wire harness And in the wiring shape display device of the wire harness for displaying the wiring shape on the screen of the display unit by the column of the cylinders defined by the node positions,
For each node of the analysis model, tangent vector data creation means for creating tangent vector data that defines a tangent vector in the three-dimensional coordinate system for analysis model analysis, and between the vector components of the tangent vector of the adjacent node from the analysis start point side A vector difference adding means for sequentially adding vector differences of the vector components in the largest coordinate axis directions, and a node allowing linearization between the nodes for the added vector difference Reference table storage means for storing a reference table for defining the number of points, and by referring to the reference table with respect to the added vector difference, the number of linearized nodes for straightening between the nodes is calculated from the analysis start point side. According to the number of nodes setting means to be set in order and the number of straightened nodes set in order, A line-line data creating means for creating a line-line data for creating a line-line data for straightening between the nodes to be continuous, and a line defined by each line-line data of the line-of-line data; Cylinder row data defining a cylinder row of a cylinder group having a length defined by each straight line data and an outer diameter corresponding to the wire harness with a line as a center line is created, and this cylinder row data is assigned to the routing shape. A wire harness routing shape display device comprising: cylindrical row image data creating means for creating cylindrical row image data by converting into projection cylindrical row data corresponding to a viewing angle.

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