JP6605370B2 - Pipe design method, computer program for pipe design, and CAD system for pipe design - Google Patents

Description

  The present invention relates to a pipeline design method executed by a CAD system. The present invention also relates to a computer program that causes a control unit and a display unit of a CAD system to execute the method. Furthermore, this invention relates to the CAD system provided with the control part and display part which perform the said method. In the present specification, the term “pipe” is used to encompass ducts in air conditioning equipment installed in buildings, water supply and air supply pipes in sanitary facilities, wiring in electrical equipment, and the like.

  In designing a pipeline for a building facility as described above, a route through which the pipeline is routed may be determined manually by the designer. Such manual design largely depends on the experience and skill of the designer, and it is difficult to keep the quality of the product constant. In an actual building process, design changes are generally performed frequently. The correction of the pipeline in the design drawing required every time the design is changed cannot be efficiently performed manually.

  Patent document 1 is disclosing the apparatus which assists creation of a building equipment design drawing. According to the apparatus, a part of the manual design process as described above can be automated. However, it is still left to the designer's experience and skill to determine the routing route, especially in buildings where there are obstacles to the pipeline.

JP-A-8-087536

  An object of the present invention is to make it possible to efficiently determine the route of a pipeline without depending on the experience and skill of the designer even in a building where an obstacle to the pipeline exists.

In order to achieve the above object, a first aspect of the present invention can be a pipeline design method executed by a CAD system,
A first coordinate axis extending in the horizontal direction, a second coordinate axis extending in the horizontal direction and intersecting the first coordinate axis, and a third coordinate axis extending in the vertical direction and intersecting the first coordinate axis and the second coordinate axis. Set the coordinate space to correspond to the space where the pipeline is placed,
The coordinate space includes a plurality of first grid lines extending parallel to the first coordinate axis, a plurality of second grid lines extending parallel to the second coordinate axis, and a plurality of third grid lines extending parallel to the third coordinate axis. Is divided into multiple unit areas,
Specify a first unit region corresponding to the starting point of the pipe line from the plurality of unit regions,
Specify a second unit area corresponding to the end point of the pipeline from the plurality of unit areas,
Designating at least one third unit region corresponding to the position of an obstacle present in the space from the plurality of unit regions;
Specify the type of obstacle for the at least one third unit region,
Based on the type of obstacle, determine whether the conduit can pass through the obstacle,
When it is determined that the conduit cannot pass through the obstacle, a route connecting the first unit region and the second unit region is determined while avoiding the third unit region corresponding to the obstacle.

  According to such a method, even in a building where an obstacle to the pipeline exists, the route of the pipeline can be determined efficiently without depending on the experience and skill of the designer.

The above method can be configured as follows.
The path includes a first path connecting the first unit area and the second unit area, a first unit area corresponding to a second start point of the pipe or a second unit area corresponding to an end point, and the first Including the second route connecting the routes,
Specify a fourth unit region corresponding to the second start point or end point from the plurality of unit regions,
The second path is determined so as to connect the fourth unit area and a point on the first path while avoiding the third unit area.

  According to such a method, even when the pipe includes a branch path, the route of the pipe can be determined efficiently without depending on the experience and skill of the designer.

The above method can be configured as follows.
The route is determined based on the length of the pipeline.

  For example, an increase in construction cost can be suppressed by determining the route so that the total length of the pipeline is shorter.

In this case, the above method can be configured as follows.
The route is determined based on the length of the pipe extending in a certain direction.

  Since the pipe is a standard product, there is a standard. For example, it is possible to reduce the number of parts other than the fixed-length pipe material by determining the path so that there are more portions where the length of the pipe line extending in a certain direction is equal. Thereby, the raise of construction cost can be suppressed.

The above method can be configured as follows.
The route is determined based on the number of changes in the direction in which the pipe extends.

  For example, it is possible to suppress the necessity of using an elbow joint that connects linearly extending pipe members or a previously bent pipe material by determining the path so that the number of changes in the direction in which the pipe extends changes. Thereby, the raise of construction cost can be suppressed.

In this case, the above method can be configured as follows.
The route is determined based on the number of portions whose directions change so that the pipe is folded back in the direction along the third coordinate axis.

  In such a portion, air and liquid tend to accumulate. For example, it is possible to suppress the necessity of providing a structure for discharging the accumulated air or liquid by determining the path so that the number of such portions is smaller. Thereby, the raise of construction cost can be suppressed.

The above method can be configured as follows.
When it is determined that the pipeline can pass through the obstacle, the route is determined based on at least one of the number of passages of the pipeline and the length required for passage.

  For example, by determining the route so that at least one of the number of passages passing the obstacles and the length required for passage becomes smaller, the necessity of construction for passing the obstacles through the conduits can be suppressed. Thereby, the raise of construction cost can be suppressed.

The above method can be configured as follows.
The length of the pipeline, the length in which the pipeline extends in a certain direction, the number in which the direction in which the pipeline extends extends, the number of portions in which the direction changes so that the pipeline is folded in the direction along the third coordinate axis, Obtain a value obtained by multiplying each of the number of passages through which the conduit passes the obstacle and the length required for passage of the obstacle by the weighting factor,
The route is evaluated based on the sum of values multiplied by the weighting factor.

  According to such a method, not only can the evaluation process be substantially automated, but also highly objective evaluation results that do not depend on the experience and skill of the evaluator can be provided.

  In order to achieve the above object, a second aspect of the present invention is a computer program for pipeline design that causes the control unit of the CAD system to execute the pipeline design method described above.

  A third aspect that the present invention can take in order to achieve the above object is a CAD system, which is a control unit that executes the above-described pipe design method, a display unit that displays the determined route, It has.

It is a flowchart which shows the pipe line design method which concerns on one Embodiment. It is a figure which shows typically the function structure of the CAD system which concerns on one Embodiment. It is a figure for demonstrating the setting of the coordinate space in the said method. It is a figure for demonstrating the division | segmentation of the coordinate space in the said method. It is a figure for demonstrating the starting point of the said method, an end point, and the position designation of an obstruction. It is a figure for demonstrating the determination method of the main path | route in the said method. It is a figure for demonstrating the determination method of the main path | route in the said method. It is a figure for demonstrating the determination method of the main path | route in the said method. It is a figure for demonstrating the determination method of the branch path in the said method.

  Exemplary embodiments will be described in detail below with reference to the accompanying drawings.

  FIG. 1 is a flowchart showing an outline of a pipeline design method according to an embodiment. This method is realized as a computer program installed in the CAD system 100 as shown in FIG.

  The CAD system 100 includes a control unit 101 and a display unit 102. The control unit 101 includes a processor and a memory that are communicably connected. Examples of the processor include a CPU and an MPU. Examples of the memory include RAM and ROM. A computer program for realizing this method is executed by the control unit 101. The display unit 102 functions as a user machine interface.

  In this method, first, a coordinate space is set (S1). FIG. 3A schematically shows a space 1 in which a pipe line is arranged. FIG. 3B schematically shows a coordinate space 2 set so as to correspond to the space 1. The coordinate space 2 is formed by a first coordinate axis 21, a second coordinate axis 22, and a third coordinate axis 23. The first coordinate axis 21 extends in the horizontal direction. The second coordinate axis 22 extends in the horizontal direction and intersects the first coordinate axis 21. The third coordinate axis 23 extends in the vertical direction and intersects the first coordinate axis 21 and the second coordinate axis 22. The coordinate space 2 can be displayed on the display unit 102.

  In the following description, for the sake of convenience, the direction indicated by the arrow of the first coordinate axis 21 is defined as the positive direction of the first coordinate axis 21. A direction along the first coordinate axis 21 and opposite to the arrow is defined as a negative direction of the first coordinate axis 21. Similarly, the direction indicated by the arrow of the second coordinate axis 22 is defined as the positive direction of the second coordinate axis 22. A direction along the second coordinate axis 22 and opposite to the arrow is defined as a negative direction of the second coordinate axis 22. Similarly, the direction indicated by the arrow of the third coordinate axis 23 is defined as the positive direction of the third coordinate axis 23. A direction along the third coordinate axis 23 and opposite to the arrow is defined as a negative direction of the third coordinate axis 23.

  Next, as shown in FIG. 1, the coordinate space is divided (S2). Specifically, as shown in FIG. 4A, the coordinate space 2 includes a plurality of units by a plurality of first grid lines 31, a plurality of second grid lines 32, and a plurality of third grid lines 33. Divided into regions 4. Each first grid line 31 extends parallel to the first coordinate axis 21. Each second grid line 32 extends parallel to the second coordinate axis 22. Each third grid line 33 extends in parallel with the third coordinate axis 23. A coordinate space 2 including a plurality of unit regions 4 can be displayed on the display unit 102.

  In the illustrated example, the coordinate space 2 is divided into 216 unit regions 4 by 25 first grid lines 31, 25 second grid lines 32, and 25 third grid lines 33. . However, the number of the first grid lines 31, the number of the second grid lines 32, and the number of the third grid lines 33 can be arbitrarily set by the user according to the specifications of the space 1 and the pipelines to be routed. . That is, at least one of the number of the first grid lines 31, the number of the second grid lines 32, and the number of the third grid lines 33 may be different.

  4B is a coordinate plane showing a state in which the plurality of unit regions 4 positioned at the uppermost stage of the coordinate space 2 shown in FIG. 4A are viewed from above along the third coordinate axis 23. This is schematically shown as 212. The coordinate space 2 can be expressed as an overlay of such coordinate planes 212. In the case of the coordinate space 2 of this example, six coordinate planes 212 are obtained. At least one of the six coordinate planes 212 can be displayed on the display unit 102.

  Next, as shown in FIG. 1, the start point and end point of the pipeline are designated (S3). Specifically, as shown in FIG. 5A, a plurality of unit regions 4 included in a coordinate plane 212 including a certain height (one unit region 4 along the third coordinate axis 23) are A unit area 41 and a second unit area 42 are designated. The first unit region 41 corresponds to the starting point of the pipeline. The second unit region 42 corresponds to the end point of the pipeline. The designation of the first unit area 41 and the second unit area 42 is performed on the display unit 102.

  Next, as shown in FIG. 1, the position and type of the obstacle are designated (S4). The obstacle means an object that hinders the pipeline to be arranged from extending linearly. Examples of the obstacle include a column, a wall, and a beam unique to the building where the pipeline is arranged. In addition, for example, when the pipeline to be arranged is for an air conditioning facility, and a sanitary facility has already been installed, the device and the pipeline related to the sanitary facility can also be an obstacle to the pipeline related to the air conditioning facility. .

  Specifically, as shown in FIG. 5B, at least one third unit region 43 is designated from the plurality of unit regions 4 included in the coordinate plane 212. The third unit region 43 corresponds to the position of an obstacle existing in the space 1. The designation of the third unit area 43 is performed on the display unit 102.

  Also, the type of obstacle corresponding to each of the designated third unit areas 43 is designated. For example, in FIG. 5B, the third unit region 431 corresponds to a wall that can be penetrated by construction. The third unit region 432 corresponds to a pillar that cannot be penetrated by construction. The third unit region 431 and the third unit region 432 can be displayed in different colors on the display unit 102. The designation of the type of obstacle can be performed by the user selecting from a predetermined menu, for example. Other types of obstacles that can be included in the menu include: walls that can be penetrated by construction, walls that cannot be penetrated by construction, existing equipment, existing pipelines that cannot be crossed, and existing pipes that can be passed through Examples include pipelines.

  Next, as shown in FIG. 1, the main route of the pipeline is determined (S5). Specifically, as shown in FIG. 6A, first, a search for the shortest path connecting the start point and the end point of the pipeline is performed. More specifically, a route search is performed in which the number of the plurality of unit regions 4 connecting the first unit region 41 and the second unit region 42 is minimized. In the case of this example, there are a plurality of shortest paths connecting the first unit region 41 located at the upper right corner of the coordinate plane 212 and the second unit region 42 located at the lower left corner of the coordinate plane 212. In FIG. 6A, three representative candidate routes 51 to 53 are shown. Such candidate paths 51 to 53 are displayed on the display unit 102.

  The candidate path 51 proceeds from the first unit region 41 in the negative direction of the first coordinate axis 21, bends in the positive direction of the second coordinate axis 22 at the upper left corner of the coordinate plane 212, and proceeds to the second unit region 42. The number of unit regions 4 located between the first unit region 41 and the second unit region 42 is sixteen. The candidate path 52 proceeds from the first unit region 41 in the positive direction of the second coordinate axis 22, bends in the negative direction of the first coordinate axis 21 at the lower right corner of the coordinate plane 212, and proceeds to the second unit region 42. The number of unit regions 4 located between the first unit region 41 and the second unit region 42 is sixteen. The candidate path 53 heads from the first unit region 41 to the second unit region 42 while repeatedly bending the first coordinate axis 21 in the negative direction and bending the second coordinate axis 22 in the positive direction. Also in this case, the number of unit regions 4 located between the first unit region 41 and the second unit region 42 is sixteen.

  When deciding the route of a pipeline, in principle, a route with a small number of bends is given priority. This is because, when the path is bent, it is necessary to provide an elbow joint that connects the pipe materials that extend in a straight line, or to prepare a pipe material that is bent in advance, which makes it difficult to reduce costs. Although the candidate routes 51 to 53 all have the same route length, the candidate route 53 has a larger number of bends than the other candidate routes. Therefore, the candidate routes 51 and 52 are preferentially examined.

  Next, it is determined whether the pipelines related to each candidate route can pass through the obstacle. Specifically, it is determined whether the third unit region 43 corresponding to the obstacle exists on each candidate route. When it is determined that the third unit region 43 exists on the candidate route, it is determined whether the pipeline can pass the obstacle based on the type of the obstacle specified for the third unit region 43. When it is determined that the pipe cannot pass through the obstacle, a route connecting the first unit area 41 and the second unit area 42 is determined while avoiding the third unit area 43 corresponding to the obstacle. .

  Thereby, even in a building where an obstacle to the pipeline exists, the route of the pipeline can be determined efficiently without depending on the experience and skill of the designer.

  In the example shown in FIG. 6A, two third unit regions 43 exist on the candidate route 51. The third unit area 43 is a third unit area 432 designated as an obstacle that cannot be penetrated by construction. Therefore, the candidate route 51 is excluded in order to determine a route so as to avoid the third unit region 432.

  Although the third unit region 43 exists on the remaining candidate route 52, the third unit region 43 is the third unit region 431 designated as an obstacle that can be penetrated by construction. Therefore, the candidate route 52 can be determined as the main route. When there are a plurality of route candidates that pass through the obstacle, the final main route can be determined so that at least one of the number of penetration points and the length of the penetration distance is reduced. The former can be determined as the number of times of transition from the normal unit region 4 to the third unit region 43 on the candidate route, and transition to the normal unit region 4 again. The latter can be determined as the number of third unit regions present on the candidate route. Based on such guidelines, an increase in cost can be suppressed.

  However, the construction that penetrates the building material requires a corresponding cost. Therefore, even if the number of bends of the route increases, the route can be re-searched without passing through the obstacle. Alternatively, such candidate paths can be left without being excluded. As shown in FIG. 6B, the number of bends of the candidate route 52 is 1, while the number of bends of the candidate route 54 is three. However, the candidate route 54 can reach the second unit region 42 only by detouring without being accompanied by an obstacle. The user can determine the final main route by comparing the cost of allowing three bends with the cost of performing the penetration work.

  In the above example, the first unit region 41 and the second unit region 42 exist in the same coordinate plane 212 for the sake of simplicity. However, the first unit area 41 and the second unit area 42 may be located on different coordinate planes 212. FIG. 7A shows a first unit region 41 and a second unit region on a coordinate plane 223 formed by the second coordinate axis 22 and the third coordinate axis 23 (for example, a coordinate plane including the leftmost column of the coordinate plane 212). An example in which 42 is included is shown.

  The coordinate plane 223 includes a candidate route 55. However, a third unit region 432 corresponding to an obstacle that cannot be penetrated by construction exists on the candidate route 55. Accordingly, the main route 50 connecting the first unit region 41 and the second unit region 42 is determined while avoiding the third unit region 432.

  That is, the determination of the main route 50 that avoids an obstacle through which the pipe cannot pass is determined by the positive direction of the first coordinate axis 21, the negative direction of the first coordinate axis 21, the positive direction of the second coordinate axis 22, and the second coordinate axis 22. Considering the possibility of detouring in the negative direction, the positive direction of the third coordinate axis 23, or the negative direction of the third coordinate axis 23, the unit area 4 located between the first unit area 41 and the second unit area 42 It may be determined to minimize at least one of the number and the number of path redirections.

  A route with a short route length and a small number of direction changes may not always be the best route. FIG. 7B shows such an example. The candidate route 56 is the shortest route that connects the first unit region 41 and the second unit region 42 while avoiding the third unit region 432 corresponding to an obstacle through which the pipe cannot pass. The number of bends in the candidate path 56 is two. However, the candidate path 56 is turned so that it once extends upward and then extends downward. In the case of such a configuration, air tends to accumulate in a pipe line extending in the horizontal direction above the obstacle, and the liquid flow tends to deteriorate. Therefore, it is necessary to provide a valve or the like for venting air, which may cause an increase in cost. On the contrary, when the pipe has a portion that changes its direction so as to extend upward after once extending downward, liquid or dust tends to accumulate in a portion positioned relatively downward. For this reason, it is necessary to provide a structure for discharging liquid or dust at the portion, which may cause an increase in cost.

  Therefore, the main path 50 can be determined so as to minimize the number of portions whose directions change so that the pipe line is folded up and down. In the example shown in FIG. 7B, the main route 50 is determined based on such a guideline. Specifically, the main path 50 extends downward from the first unit region 41, changes its direction in the positive direction or negative direction of the first coordinate axis 21, changes its direction in the positive direction of the second coordinate axis 22, and then again The direction of the coordinate axis 21 is changed in the positive direction or the negative direction to reach the second unit region 42. Therefore, the route length of the main route 50 is longer than that of the candidate route 56 and the number of bends is three. However, it can be said that the main route 50 shown in the figure is preferable from the viewpoint of suppressing the above cost increase.

  When there are a plurality of candidate routes having the same route length and the same number of bends, the main route 50 can be determined based on the length of the pipe extending in a certain direction. The two pipe lines schematically shown in FIGS. 8A and 8B have the same path length and the same number of bends. In such a case, the main route 50 can be determined so that there are many places where the pipe line extends in a certain direction.

  In the pipe line shown in FIG. 8A, three pipe materials 200 having a standard L are connected by an elbow joint 201 to connect a start point 202 and an end point 203.

  On the other hand, in the pipe line shown in FIG. 8B, the distance between the starting point 202 and the elbow joint 201 arranged at the first bending point is longer than the standard L. Therefore, it is necessary to connect the pipe material 204 having a different length to the elbow joint 201 and to connect the pipe material 200 and the pipe material 204 with a joint 205 such as a socket joint or a flange joint. The elbow joint 201 and the end point 203 arranged at the second bending point are further connected by a pipe material 206 having another length.

  The pipe shown in FIG. 8B needs to use a plurality of types of pipe materials having different lengths and a joint 205 such as a socket joint or a flange joint. On the other hand, the pipe line shown in FIG. 8A can use the same type of pipe material and does not require a joint 205 such as a socket joint or a flange joint, so that an increase in cost can be suppressed. Therefore, when there are a plurality of candidate routes having the same route length and the same number of bends, a route that realizes a pipeline as shown in FIG. 8A can be selected.

  Next, as shown in FIG. 1, the necessity of providing a branch path is determined (S6). The branch path is a path (an example of the second path) that extends from a start point different from the start point corresponding to the first unit region 41 and joins a part of the main path 50 (an example of the first path), and a main path. It means a route (an example of a second route) that branches from a part of the route and reaches an end point different from the end point corresponding to the second unit region 42 described above. If it is not necessary to provide a branch path (NO in S6), the method ends.

  When it is necessary to provide a branch path (YES in S6), processing for determining the branch path is performed (S7). Specifically, as shown in FIG. 9A, a fourth unit region 441 corresponding to another start point (an example of a second start point) is specified from the plurality of unit regions 4. A plurality of fourth unit regions 441 may be specified. In addition to or instead of this, a fourth unit region 442 corresponding to another end point (an example of a second end point) is specified from the plurality of unit regions 4. A plurality of fourth unit regions 442 may be designated. In the example of the figure, both the fourth unit region 441 and the fourth unit region 442 are designated.

  The junction path 61 is determined so as to connect the fourth unit area 441 and the main path 50 while avoiding the third unit area 43 corresponding to the obstacle that the pipe cannot pass. Similar to the process for determining the main route 50, the length of the route and the number of bends are taken into consideration, the length of the pipe extending in a certain direction as necessary, the number and length of the parts penetrating the obstacle, and the vertical direction. At least one of the number of portions where the duct extends so as to be folded is considered.

  In the case of the example shown in FIG. 9B, two candidate routes can be considered as the merge route 61. The candidate route 611 can join the main route 50 with the shortest route length, but requires an obstacle penetration construction. Although the route length of the candidate route 612 is longer than that of the candidate route 611, the obstacle route does not need to be penetrated. The user can determine the final merging route 61 by comparing the cost related to the route length with the cost related to the penetration work.

  The branch path 62 is determined so as to connect the fourth unit area 442 and the main path 50 while avoiding the third unit area 43 corresponding to the obstacle that the pipe cannot pass. Similar to the process for determining the main route 50, the length of the route and the number of bends are taken into consideration, the length of the pipe extending in a certain direction as necessary, the number and length of the parts penetrating the obstacle, and the vertical direction. At least one of the number of portions where the duct extends so as to be folded is considered.

  In the example shown in FIG. 9B, a branch path 62 that can minimize the path length and the number of bends while avoiding an obstacle can be uniquely determined.

  Next, a method for evaluating the route determined as described above will be described. The evaluation can be performed on at least one of the main path 50, the joining path 61, and the branch path 62 determined as described above.

  Specifically, the length of the pipeline, the number of changes in the direction in which the pipeline extends, the number of portions extending so that the direction in which the pipeline extends extends in a direction along the third coordinate axis 23, and the pipeline passes through the obstacle. A value obtained by multiplying each of the number and the length of passage through the obstacle by a weighting factor is obtained. Which of these parameters is important depends on the specifications of the building where the pipe is installed and the allowable cost. The user can appropriately change the weighting coefficient according to such circumstances. If it is not necessary to consider a specific parameter, the weighting coefficient may be set to zero.

  Next, the sum of the values obtained by multiplying the weighting coefficients is obtained. The route determined based on this sum value is evaluated.

  According to such a method, not only can the evaluation process be substantially automated, but also highly objective evaluation results that do not depend on the experience and skill of the evaluator can be provided.

  The above evaluation method can also be applied when determining a final route from a plurality of candidate routes. That is, it is possible to acquire the above sum value for a plurality of candidate routes and determine the candidate route having the highest sum value as the final route.

  According to such a method, not only can the design process be substantially automated, but also design results that do not depend on the experience and skill of the designer can be provided with high reproducibility.

  The above embodiment is merely an example for facilitating understanding of the present invention. The configuration according to the above embodiment can be changed or improved as appropriate without departing from the spirit of the present invention. In addition, it is obvious that equivalents are included in the technical scope of the present invention.

  1: space, 2: coordinate space, 21: first coordinate axis, 22: second coordinate axis, 23: third coordinate axis, 31: first grid line, 32: second grid line, 33: third grid line, 4: Unit area 41: First unit area 42: Second unit area 43: Third unit area 44: Fourth unit area 50: Main path 61: Merge path 62: Branch path 100: CAD system 101: Control unit, 102: Display unit

Claims (10)

A pipeline design method executed by a CAD system,
A first coordinate axis extending in the horizontal direction, a second coordinate axis extending in the horizontal direction and intersecting the first coordinate axis, and a third coordinate axis extending in the vertical direction and intersecting the first coordinate axis and the second coordinate axis. Set the coordinate space to correspond to the space where the pipeline is placed,
The coordinate space includes a plurality of first grid lines extending parallel to the first coordinate axis, a plurality of second grid lines extending parallel to the second coordinate axis, and a plurality of third grid lines extending parallel to the third coordinate axis. Is divided into multiple unit areas,
Specify a first unit region corresponding to the starting point of the pipe line from the plurality of unit regions,
Specify a second unit area corresponding to the end point of the pipeline from the plurality of unit areas,
Designating at least one third unit region corresponding to the position of an obstacle present in the space from the plurality of unit regions;
Specify the type of obstacle for the at least one third unit region,
Based on the type of obstacle, determine whether the conduit can pass through the obstacle,
When it is determined that the conduit cannot pass through the obstacle, a path connecting the first unit area and the second unit area is determined while avoiding a third unit area corresponding to the obstacle.
Pipe design method. The route includes a first route that connects the first unit region and the second unit region, and a second route that connects the second start point or end point of the pipe and the first route,
Specify a fourth unit region corresponding to the second start point or end point from the plurality of unit regions,
The second path is determined so as to connect the fourth unit area and a point on the first path while avoiding the third unit area.
The pipe line design method according to claim 1. The path is determined based on the length of the conduit;
The pipe line design method according to claim 1 or 2. The route is determined based on a length of the pipe extending in a certain direction.
The pipe line design method according to claim 3. The route is determined based on the number of changes in the direction in which the pipe extends.
The pipe line design method according to any one of claims 1 to 4. The route is determined based on the number of portions whose direction changes so that the pipe folds in a direction along the third coordinate axis.
The pipe line design method according to claim 5. When it is determined that the pipeline can pass through the obstacle, the route is determined based on at least one of the number of passages of the pipeline and the length required for passage,
The pipe line design method according to any one of claims 1 to 6. The length of the pipeline, the length in which the pipeline extends in a certain direction, the number in which the direction in which the pipeline extends extends, the number of portions in which the direction changes so that the pipeline is folded in the direction along the third coordinate axis, Obtain a value obtained by multiplying each of the number of passages through which the conduit passes the obstacle and the length required for passage of the obstacle by the weighting factor,
Evaluating the path based on a sum of values multiplied by the weighting factor;
The pipe line design method according to claim 1 or 2. Making the control part of a CAD system perform the pipe line design method according to any one of claims 1 to 8.
Computer program for pipe design. A control unit for executing the pipeline design method according to any one of claims 1 to 8,
A display for displaying the determined route;
With
CAD system.

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