WO2006103741A1 - 電磁界強度算出方法、電磁界強度算出装置、制御プログラム - Google Patents
電磁界強度算出方法、電磁界強度算出装置、制御プログラム Download PDFInfo
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- WO2006103741A1 WO2006103741A1 PCT/JP2005/005783 JP2005005783W WO2006103741A1 WO 2006103741 A1 WO2006103741 A1 WO 2006103741A1 JP 2005005783 W JP2005005783 W JP 2005005783W WO 2006103741 A1 WO2006103741 A1 WO 2006103741A1
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/30—Circuit design
- G06F30/36—Circuit design at the analogue level
- G06F30/367—Design verification, e.g. using simulation, simulation program with integrated circuit emphasis [SPICE], direct methods or relaxation methods
Definitions
- Electromagnetic field strength calculation method calculates electromagnetic field strength of electromagnetic field strength calculation device, control program
- the present invention relates to an electromagnetic field strength calculation method, an electromagnetic field strength calculation device, and a control program, and in particular, calculates an electromagnetic field strength radiated from an electric circuit device such as an electronic device or a circuit board based on a moment method.
- the present invention relates to a technology that is effective when applied to electromagnetic wave analysis technology.
- an electromagnetic field strength calculation device that calculates the strength of an electric field or magnetic field radiated from an isotropic force of an electronic device based on this method of moments, a plane such as a power supply layer and a ground layer of a printed circuit board of the electronic device to be analyzed
- the ability to accurately divide and model conductor patterns is important for realizing high-precision and high-speed simulation.
- the circuit element placement Z wiring data on the printed circuit board is the CAD data from the design support device (CAD: Computer Aided Design) for printed circuit board design. It can be created relatively easily by capturing. However, the pattern shape data of the planar conductor pattern of the power supply layer and ground layer must be taken from CAD and then divided into mesh models suitable for the moment method, and a method to create this mesh model accurately and quickly is required. Has been.
- Patent Document 2 the shape of a planar conductor pattern such as a power supply layer and a ground layer obtained from CAD data in the board design process is divided into a mesh model in which squares and triangles are mixed. I was angry.
- the planar conductor pattern is mesh-divided as it is.
- the resulting mesh pattern was a mixture of squares and triangles, and was a technique suitable for the moment method.
- Patent Document 1 Japanese Patent Laid-Open No. 5-95931
- Patent Document 2 JP-A-9 5375
- Patent Document 3 Japanese Unexamined Patent Publication No. 2003-216681
- An object of the present invention is to provide a technology capable of accurately and efficiently generating mesh data used for simulation analysis of electromagnetic field intensity by the moment method using CAD data in the design support process as it is. There is to do.
- Another object of the present invention is to provide a technique capable of shortening the time required for the development process of an electronic device or the like including a simulation analysis process of electromagnetic field strength.
- Another object of the present invention is to increase the analysis speed by reducing the number of mesh patterns included in the mesh data used for simulation analysis of electromagnetic field strength by the moment method, and to improve the analysis accuracy by making the mesh patterns finer. It is to provide technology that can achieve both.
- a first aspect of the present invention is a first step of extracting design shape data of a conductor pattern as well as design data power of an object
- the present invention provides a method for calculating an electromagnetic field intensity that corrects an error.
- a third aspect of the present invention is the electromagnetic field strength calculation method according to the first aspect, in which when the operating potentials of the conductor patterns belonging to a plurality of adjacent pattern shape data are different,
- a fourth aspect of the present invention is the electromagnetic field intensity calculation method according to the first aspect, wherein in the third step, the pattern shape data isolated in a hole shape or an island shape is further deleted. Provided is a method for calculating electromagnetic field strength.
- a fifth aspect of the present invention is the electromagnetic field intensity calculation method according to the first aspect, in which the second step is performed when the conductor pattern constituting the object has a plurality of layers. Then, an electromagnetic field intensity calculation method for dividing the pattern shape data into the mesh patterns so that the boundary of the mesh pattern obtained for each of the layers is matched between the plurality of layers. provide.
- a sixth aspect of the present invention is the electromagnetic field intensity calculation method according to the first aspect, wherein in the third step, the plurality of first mesh patterns obtained in the second step are The second mesh pattern adjacent to the first mesh pattern is aggregated into a small number of second mesh patterns within a range that does not impair the outline of the arrangement state of the first mesh patterns.
- An electromagnetic field strength calculation method is provided in which each side of a mesh pattern is divided by an extended dividing line.
- a current flowing through a conductor pattern constituting an object is calculated by a boundary element method, and an electromagnetic field intensity radiated by the object is calculated based on the calculated current.
- a first means for extracting pattern shape data of the conductor pattern also for design data power of the object
- a ninth aspect of the present invention is the electromagnetic field intensity calculation device according to the seventh aspect, wherein the third means is an operating potential of the conductor pattern belonging to a plurality of adjacent pattern shape data. Are different from each other, the mesh pattern obtained from each of the plurality of pattern shape data is not short-circuited.
- an electromagnetic field intensity calculation device having a function of performing the correction by filling the entire interior with the conductor pattern.
- a tenth aspect of the present invention is the electromagnetic field intensity calculation device according to the seventh aspect, wherein the third means further deletes the pattern shape data isolated in a hole shape or an island shape.
- an electromagnetic field intensity calculating device having a function.
- An eleventh aspect of the present invention is the electromagnetic field intensity calculation device according to the seventh aspect, wherein the second means is a case where the conductor pattern constituting the object has a plurality of layers. Electromagnetic field strength having a function of dividing the pattern shape data into the mesh patterns so that boundaries of the obtained mesh patterns are matched between the plurality of layers. A calculation device is provided.
- a twelfth aspect of the present invention is the electromagnetic field intensity calculation device according to the seventh aspect,
- the third means includes a plurality of first mesh patterns obtained in the second means, with a small number of second sizes having a larger size within a range that does not impair the outline of the arrangement state of the first mesh patterns.
- An electromagnetic field intensity calculation device having a function of dividing the second mesh pattern adjacent to the first mesh pattern by a dividing line extending from each side of the first mesh pattern. I will provide a.
- a thirteenth aspect of the present invention is a control program for causing a computer to function as an electromagnetic field intensity calculation device
- a fourteenth aspect of the present invention is the control program according to the thirteenth aspect
- a fifteenth aspect of the present invention is the control program according to the thirteenth aspect
- the inside of the mesh pattern including the contour A control program for performing the correction by filling all of the mesh pattern with the conductor pattern is provided.
- a sixteenth aspect of the present invention is the control program according to the thirteenth aspect
- a control program for performing a process of deleting the pattern shape data isolated in a hole shape or an island shape is further provided.
- a seventeenth aspect of the present invention is the control program according to the thirteenth aspect
- the boundary of the mesh pattern obtained by the pattern shape data force for each of the layers is a plurality of the layers.
- An eighteenth aspect of the present invention is the control program according to the thirteenth aspect
- the plurality of first mesh patterns obtained in the second step are converted into a small number of second meshes having a larger size within a range that does not impair the outline of the arrangement state of the first mesh pattern.
- a control program is provided in which the second mesh pattern adjacent to the first mesh pattern is divided into dividing lines obtained by extending each side of the first mesh pattern.
- FIG. 1A is a conceptual diagram showing a current direction in a triangular mesh pattern in a simulation of electromagnetic field intensity analysis by a moment method.
- FIG. 1B is a conceptual diagram showing the direction of current in a square mesh pattern in a simulation of electromagnetic field intensity analysis by the moment method.
- FIG. 1C is a conceptual diagram showing the direction of current in a mesh pattern of a plurality of triangles in a simulation of electromagnetic field strength analysis by the moment method.
- FIG. 1D is a conceptual diagram showing the direction of current in a plurality of quadrilateral mesh patterns in a simulation of electromagnetic field strength analysis by the moment method.
- FIG. 2 is a conceptual diagram showing a mesh pattern setting method in a multilayer wiring structure in an electromagnetic field strength analysis technique which is a reference technique of the present invention.
- FIG. 3 is an electromagnetic field intensity calculation for implementing an electromagnetic field intensity calculation method according to an embodiment of the present invention. It is a conceptual diagram which shows an example of a structure of a taking-out apparatus.
- FIG. 4 is a block diagram showing an example of a configuration of an information processing system that realizes an electromagnetic field intensity calculation device according to an embodiment of the present invention.
- V. 5 A flowchart showing an example of a manufacturing process of an electronic device when the electromagnetic field intensity calculation method and apparatus according to an embodiment of the present invention is used.
- FIG. 9 is a conceptual diagram showing the relationship between the planar conductor pattern of CAD data and mesh data in the electromagnetic field intensity calculation method and apparatus according to one embodiment of the present invention.
- FIG. 10 is a conceptual diagram showing a method of aligning mesh data between layers in a multilayer wiring structure in an electromagnetic field intensity calculation method and apparatus according to an embodiment of the present invention.
- FIG. 11 is a conceptual diagram showing an isolated pattern deletion process in the electromagnetic field intensity calculation method and apparatus according to an embodiment of the present invention.
- FIG. 13A is a conceptual diagram showing an example of a method for correcting a partial missing mesh in the electromagnetic field intensity calculating method and apparatus according to an embodiment of the present invention.
- FIG. 13B A conceptual diagram showing an example of a method for correcting a partial missing mesh in the electromagnetic field intensity calculating method and apparatus according to an embodiment of the present invention.
- FIG. 14 is a conceptual diagram showing mesh data obtained by contour correction that does not consider a short circuit between conductor patterns in the electromagnetic field strength calculation method and apparatus according to an embodiment of the present invention.
- FIG. 16 shows an electromagnetic field intensity calculation method and apparatus according to an embodiment of the present invention.
- FIG. 17 shows an electromagnetic field intensity calculation method and apparatus according to an embodiment of the present invention.
- FIG. 16 is a conceptual diagram showing a processing result when parting lines are partially added to 16 mesh data.
- FIG. 3 is a conceptual diagram showing an example of the configuration of an electromagnetic field strength calculating apparatus that performs the electromagnetic field strength calculating method according to an embodiment of the present invention
- FIG. 4 is an electromagnetic field strength according to the present embodiment. It is a block diagram which shows an example of a structure of the information processing system which implement
- FIG. 5 is a flowchart showing an example of a manufacturing process of an electronic device such as a printed circuit board when the electromagnetic field intensity calculation method and apparatus according to the present embodiment is used.
- FIG. 6, FIG. 7 and FIG. 8 are flowcharts showing an example of the operation of the electromagnetic field intensity calculation method and apparatus of the present embodiment.
- the information processing system 10 includes an MPU (Micro Processor Unit) 11, a main memory 12, a display 13, an information input unit 14, an external storage device 15, and a bus 16 for connecting them. .
- MPU Micro Processor Unit
- the MPU 11 controls the entire information processing system 10 by executing a program such as the operating system 20 stored in the main memory 12.
- the main memory 12 stores programs and data executed by the MPU 11.
- the main memory 12 stores an operating system 20, a CAD program 21, a mesh data creation program 22, and an electromagnetic field strength analysis program 23! RU
- the CAD program 21 is a program that causes the information processing system 10 to function as a CAD device that supports the design of an electric circuit device such as an electronic device or a printed board.
- the design data such as circuit patterns output from the CAD program 21 is stored in the CAD data file 31.
- the electromagnetic field strength analysis program 23 sets up the information processing system 10 with the CAD program 21. This is a program that functions as an electromagnetic field strength analysis device for performing electromagnetic field strength analysis processing on a measured printed circuit board.
- the electromagnetic field strength calculation technique based on the moment method performed by the electromagnetic field strength analysis program 23 is the "electromagnetic field strength calculation device" disclosed in Japanese Patent Laid-Open No. 9-5375 by the applicant of the present invention. Technology can be used.
- the mesh data creation program 22 is a program that generates mesh data 40 (described later) to be used for the electromagnetic field strength analysis program 23 from the CAD data file 31.
- the display 13 visualizes and displays information such as the execution results of various programs stored in the main memory 12.
- the information input unit 14 includes a keyboard and a mouse, and is used for information input by the user.
- the external storage device 15 stores information loaded into the main memory 12 in a nonvolatile manner.
- the external storage device 15 stores a CAD data file 31, a mesh data file 32, an electric field / magnetic field file 33, a current file 34, and option information 35.
- the CAD data file 31 is a file in which design data such as the circuit and structure of the printed circuit board generated by the CAD program 21 is stored.
- This design data includes the shape information of the conductor pattern of each layer in the printed circuit board having a multilayer wiring structure.
- this design data includes data of a planar conductor pattern 51, a planar conductor pattern 52, a planar conductor pattern 55, etc., which will be described later.
- the mesh data file 32 stores mesh data 40 generated from information in the mesh data creation program 22 force CAD data file 31.
- the option information 35 is information specified by the user force, and is used as control information for controlling the operation of the mesh data creation program 22. Examples of the control information include frequency f, lattice size S, correction determination threshold St, deletion determination threshold Dt, maximum lattice size Smax, and the like.
- the frequency f is a frequency of a high-frequency current of a clock element or the like serving as an electromagnetic wave radiation source during simulation of electromagnetic field intensity calculation.
- the grating size S is set based on the wavelength of the electromagnetic wave of this frequency f!
- the lattice size S is a lattice size S1 to a lattice size S3 described later. Normally, the higher the frequency f, the smaller the set value of the lattice size S.
- the correction determination threshold St is used for processing for generating a blank correction mesh pattern 42 and an embedded correction mesh pattern 43 described later.
- the deletion determination threshold Dt is used to determine whether or not to perform processing for deleting an isolated pattern such as a via hole 53 and a land 54 described later, embedding processing, and the like.
- the maximum lattice size Smax indicates the maximum permissible value of the lattice size S of the simplified mesh pattern 41L after aggregation allowed in the mesh aggregation process described later.
- the mesh data creation program 22 includes, for example, a power supply Z ground data reading unit 22a, a planar conductor pattern 22b in the same layer, and an interlayer mesh matching processing unit 22c. , Minute shape deletion processing unit 22d, adjacent portion lattice deletion processing unit 22e, rectangular shape interpolation processing unit 22f, mesh simplification ⁇ division processing unit 22g, overlap mesh division processing unit 22h, mesh data writing unit 22i and memory unit 22j It consists of each module.
- the memory unit 23 ⁇ 4 is a work storage area commonly used by other modules.
- the power supply Z ground data reading unit 22a reads CAD data such as the planar conductor pattern 51 and the planar conductor pattern 52 as illustrated in FIG. 9 from the CAD data file 31. The operation of reading is performed.
- planar conductor pattern 22b in the same layer is obtained from the CAD data of each layer of the printed circuit board having a multi-layer structure.
- the planar conductor pattern in the same layer (in this embodiment, the planar conductor pattern in FIG. The pattern 51 and the planar conductor pattern 52) are collected.
- the interlayer mesh matching processing unit 22c performs processing for matching mesh boundaries between a plurality of pieces of mesh data 40 generated for each layer of the multilayer structure (that is, the origin of the mesh data 40 in each layer).
- the mesh data 40 generated for the planar conductor pattern 55 belonging to the lower ground layer 50a and the upper side The grid origin G1 and the grid origin G2 of the mesh data 40 generated for the planar conductor pattern 51 and the planar conductor pattern 52 belonging to the power supply layer 50b of the power source layer 50b are set so as to coincide with each other when viewed from the stacking direction. Thereby, when the size of the mesh data 40 is set to be the same in the upper and lower layers, the boundaries of the mesh data 40 in the individual layers are in a consistent state.
- the minute shape deletion processing unit 22d determines the size of an isolated pattern such as the via hole 53 and the land 54 based on the deletion determination threshold value Dt, and performs deletion.
- the via hole 53 is deleted if the size of the via hole 53 is larger than the deletion determination threshold D specified by the user (that is, the via hole 53 The conductor is buried and disappears).
- the size of the land 54 is determined based on the deletion determination threshold Dt, and the size of the size equal to or smaller than the deletion determination threshold Dt. Land 54 performs the deletion process.
- the adjacent portion lattice deletion processing unit 22e is located in the outline region of the plurality of planar conductor patterns 51 and 52 in the same layer, and includes a part of the conductor pattern.
- a process of deleting (blank) the mesh pattern 41 (hereinafter, such a mesh pattern 41 is referred to as a partial missing mesh 41P) is performed.
- this value is smaller than the specified correction judgment threshold S (Sr and St)
- the partially missing mesh 41P is all blanked and the blank correction mesh pattern Perform the replacement process to turn 42.
- FIG. 14 shows a processing result in the case where the planar conductor pattern 51 and the planar conductor pattern 52 exemplified in FIG. 9 have the same potential during operation, and both may be short-circuited.
- FIG. 15 shows a case where the potentials during operation of the planar conductor pattern 51 and the planar conductor pattern 52 are different.
- the condition that the two are not short-circuited is further added. This is a processing result when the blank correction mesh pattern 42 or the embedded correction mesh pattern 43 is complemented.
- FIG. 16 shows a case where the mesh pattern 41 and the embedded correction mesh pattern 43 (lattice size S1) in the state of FIG. 15 are replaced with the simplified mesh pattern 41L (lattice size S2).
- the overlap mesh division processing unit 22h is used when the mesh pattern 41 having a different size and the simplified mesh pattern 41L are mixed in the mesh data 40 by the processing of the above-described mesh simple division processing unit 22g.
- a process of setting a dividing line corresponding to the length of each side of the mesh pattern 41 is performed on the large-sized simplified mesh pattern 41L adjacent to the small-size mesh pattern 41.
- the overlap mesh division processing unit 22h applies each of the mesh patterns 41 to the large simplified mesh pattern 41L adjacent to the small mesh pattern 41.
- a process of superimposing an overlap pattern 60 for setting the dividing line 61 corresponding to the length of the side is performed.
- This dividing line 61 is used only for the simulation between the mesh pattern 41 and the simplified mesh pattern 41L having different sizes, is ignored in the simulation between the simplified mesh patterns 41L, and the sides of the actual simplified mesh pattern 41L.
- the current is calculated using the length.
- the mesh data writing unit 22i performs a process of outputting the mesh data 40 finally obtained by the process as described above to the mesh data file 32.
- the CAD program 21 is executed to support the design of the printed circuit board, and the design data is output to the CAD data file 31 (step 101).
- the mesh data 40 obtained as the execution result of the mesh data creation program 22 is output to the mesh data file 32 (step 200).
- the electromagnetic field strength analysis program 23 is executed to obtain the planar conductor pattern 51 and the planar conductor pattern 52 constituting the printed circuit board.
- Conduct an electromagnetic field strength analysis to analyze the strength distribution of the electric and magnetic fields from the source (step 102).
- step 103 Based on the result of step 102, for example, countermeasures against electromagnetic interference (EMI) are performed as necessary (step 103).
- EMI electromagnetic interference
- step 104 the printed circuit board is manufactured.
- step 200 The process of step 200 described above will be described in detail with reference to the flowchart of FIG.
- the mesh data creation program 22 is activated, and first, optional information 35 such as various threshold values is set using the information input unit 14 or the like (step 201).
- optional information 35 such as various threshold values is set using the information input unit 14 or the like (step 201).
- a file may be used to input option information 35.
- the interlayer mesh matching processing unit 22c performs the lattice origin G 1 and the lattice origin between the plurality of mesh data 40 set for each of the plurality of conductor layers of the multilayer structure.
- a process for sharing G2 is performed (step 202). Thereby, for example, the boundary of the mesh pattern 41 can be matched between the mesh data 40 set in each layer of the multilayer wiring structure.
- the power supply Z ground data reading unit 22a selects one conductor layer, and the data of the planar conductor pattern 51 and the planar conductor pattern 52 belonging to the conductor layer from the CAD data file 31 to the memory unit. Read in 23 ⁇ 4. The read data is displayed on the display 13 as shown in FIG. 9 (step 203).
- the minute shape deletion processing unit 22d performs an isolated pattern deletion process as exemplified in FIGS. 11 and 12 (step 300).
- an isolated pattern such as one via hole 53 and land 54 is selected from the planar conductor pattern 51 and the planar conductor pattern 52 (step 301), and it is determined whether or not the size is larger than the deletion judgment threshold D. (Step 302).
- deletion processing is performed by deleting or embedding the isolated pattern (step 303). If it is determined in step 302 that the size is larger than the deletion determination threshold Dt, step 303 is skipped.
- Step 304 This process is repeated for all isolated patterns! (Step 304).
- the plane conductor pattern 51 and the plane conductor pattern 52 are divided into mesh data 40 including a number of mesh patterns 41 based on the lattice origin G2 (step 204).
- the adjacent lattice deletion processing unit 22e and the rectangular shape interpolation processing unit 22f are activated to search for the partial missing mesh 41P (step 205), and the ratio Sr of the blank area Sb to the pattern area Sc is calculated. (Step 206).
- the ratio Sr is larger than the correction determination threshold value S (step 207)
- the partial missing mesh 41P is replaced with the blank correction mesh pattern 42 (step 213).
- Step 207 it is further determined whether or not a short circuit occurs between different potentials between the adjacent planar conductor pattern 51 and the planar conductor pattern 52. (Step 208) If a short circuit occurs between different potentials, branch to Step 213 and replace with the blank correction mesh pattern 42 to avoid the short circuit.
- step 208 If it is determined in step 208 that there is no short circuit between different potentials, the partial missing mesh 41P is replaced with the embedded correction mesh pattern 43 (step 209).
- step 210 the processing from step 203 to step 209 and step 213 is performed for all the partial missing meshes 41 P in the same layer (step 210).
- the contour shapes of the planar conductor pattern 51 and the planar conductor pattern 52 which are subject to analysis of electromagnetic field strength calculation, are reflected with the desired accuracy, and the force is also a plurality of mesh patterns consisting of only a square suitable for the moment method. Is recorded in mesh data file 32.
- step 400 The mesh simplification process in step 400 will be described with reference to the flowchart in FIG.
- the amount of calculation increases in proportion to the number of mesh patterns 41 and embedded correction mesh patterns 43 that constitute the input mesh data 40, and the time required for analysis increases. Become.
- a plurality of adjacent mesh patterns 41 of normal size (lattice size S1), embedded correction mesh pattern 43, and the like.
- a simplified mesh pattern 41L of a larger size (lattice size S3) is generated, the total number of mesh patterns is reduced, and the amount of calculation in the subsequent electromagnetic field strength analysis process is reduced.
- the overlap mesh division processing unit 22h superimposes the overlap pattern 60 on the boundary between the mesh pattern 41, the embedding correction mesh pattern 43, and the simplified mesh pattern 41L, so The edge length is matched at the boundary (step 404).
- the mesh data 40 generated as described above is stored in the mesh data file 32.
- This mesh data file 32 becomes the input data of the electromagnetic field strength analysis program 23 (electromagnetic field strength calculation device), and the radiation analysis of electromagnetic waves from the power layer Z ground layer of the printed circuit board by the moment method etc. can be performed. .
- the CAD data file 31 is used as it is without being corrected in advance, and only the square suitable for the simulation of the electromagnetic field intensity calculation by the moment method is also obtained.
- Mesh data 40 can be automatically generated that includes both the force and the mesh pattern group force reflecting the contour shape of the planar conductor pattern 51 and the planar conductor pattern 51. This eliminates the need for preparatory work such as manually modifying the CAD data file 31 in advance, and can significantly reduce the man-hours and time required to generate the mesh data file 32.
- a plurality of mesh patterns 41 and the embedding correction mesh pattern 43 are aggregated into a simplified mesh pattern 41L within a range permitted by the required accuracy in electromagnetic field strength calculation, and the number of mesh patterns included in the mesh data 40 is reduced. By reducing the number, it is possible to realize a high-speed simulation using the simplified minimum number of mesh patterns while maintaining analysis accuracy in the calculation of electromagnetic field strength.
- the overlap pattern 60 is superimposed on the boundary between the mesh pattern 41 and the embedding correction mesh pattern 43 and the simplified mesh pattern 41L obtained by consolidating the mesh pattern 41 and the embedded correction mesh pattern 43, thereby connecting the mesh patterns having different sizes.
- a fine grid size S is specified, mesh data 40 reflecting the contour of the planar conductor pattern with the required size is generated, and further, the mesh pattern in the center is within a range that does not impair the contour.
- the analysis speed is increased by reducing the number of mesh patterns included in the mesh data used for electromagnetic field strength simulation analysis by the moment method. In addition, it is possible to achieve both improvement in analysis accuracy by miniaturization of the mesh pattern.
- the technique of the present invention is not limited to the generation of mesh data used for simulation of electromagnetic field intensity calculation by the moment method, but widely used for generation of mesh data models used for general simulation using the boundary element method. Can be applied.
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JP2007510270A JP4499781B2 (ja) | 2005-03-28 | 2005-03-28 | 電磁界強度算出方法、電磁界強度算出装置、制御プログラム |
PCT/JP2005/005783 WO2006103741A1 (ja) | 2005-03-28 | 2005-03-28 | 電磁界強度算出方法、電磁界強度算出装置、制御プログラム |
US11/864,297 US8065101B2 (en) | 2005-03-28 | 2007-09-28 | Electromagnetic field intensity calculating method and apparatus |
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2005
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- 2005-03-28 JP JP2007510270A patent/JP4499781B2/ja not_active Expired - Fee Related
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2007
- 2007-09-28 US US11/864,297 patent/US8065101B2/en not_active Expired - Fee Related
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JP2001013184A (ja) * | 1999-06-30 | 2001-01-19 | Fujitsu Ltd | 電磁界強度算出装置および記録媒体 |
JP2002288241A (ja) * | 2001-03-27 | 2002-10-04 | Fujitsu Ltd | 電磁界強度算出装置への入力データ作成方法および作成装置 |
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JP2008225698A (ja) * | 2007-03-09 | 2008-09-25 | Fujitsu Ltd | 設計方法、プログラム及び記憶媒体 |
WO2018173338A1 (ja) * | 2017-03-24 | 2018-09-27 | 株式会社 東芝 | 情報提示装置、情報提示方法及びプログラム |
US11295489B2 (en) | 2017-03-24 | 2022-04-05 | Kabushiki Kaisha Toshiba | Information presentation device, information presentation method and storage medium |
JP2018195045A (ja) * | 2017-05-17 | 2018-12-06 | 日本電信電話株式会社 | 電磁界解析方法及び電磁界解析装置 |
Also Published As
Publication number | Publication date |
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JP4499781B2 (ja) | 2010-07-07 |
US20080079443A1 (en) | 2008-04-03 |
JPWO2006103741A1 (ja) | 2008-09-04 |
US8065101B2 (en) | 2011-11-22 |
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