JP5879917B2 - Parts selection apparatus, method and program - Google Patents

Description

  The present invention relates to a technique for selecting a part to be used in product design. More specifically, the present invention relates to a technique for selecting branch parts to be applied to wiring design.

  A branch part is a part that branches a wire (line part).

  In product design, branch parts are used to branch the wires connecting the parts. Necessary branch parts differ depending on the scale of the wire, such as the number and length of wires mounted on the product. However, because it is inefficient to develop branch parts for each design, a branch part in which multiple terminals branch in different patterns internally is developed in advance as a standard part, and the branch part that is optimal for the target product is selected. It is common to use it.

  For example, in the wiring harness design of a vehicle, a junction box that is a terminal and a protection box for connecting, branching, and relaying wires are used as branch parts. The designer has selected an optimum junction box based on his / her experience from a plurality of junction boxes which are standard parts developed in advance.

  Conventionally, in electronic circuit design, block information including parts, terminals, and connections to be detected is registered based on circuit information including parts, terminals, and connections between terminals. A technique for detecting a circuit block including components, connections, and the like corresponding to block information is known.

  In addition, there is known a technique for selecting an optimal part selected by a manufacturer based on an input usage condition of the part and displaying technical information corresponding to the optimal part necessary for designing with the selected optimal part. .

JP 2008-234297 A JP 2002-092043 A

  In the conventional wire harness design, the designer selects an optimum branch part based on his / her experience from among a plurality of standardly developed branch parts. In the vehicle wire harness design example described above, the designer selects a junction box that is used in a similar vehicle model by comparing the vehicle model to be designed with a model that has been designed in the past, We predicted the increase in wire due to the improvements and selected junction boxes with ample terminals and branches.

  However, junction boxes used in past similar models are not necessarily optimal for the model being designed. When the branch provided in the selected junction box cannot be used and branch processing (splice) outside the junction box is required, the margin of the junction box selected for improvement is excessive, so the cost is high. Problems may occur.

  In particular, when the design scale is such that the number of wires mounted on the product is several hundred to several thousand, the optimal junction box should be selected from the standard parts by judging the branching state based on the wire connection relationship. Becomes even more difficult. Also, as the design scale increases, the number of terminals and the number of branches increase and the branch patterns become complex and diversified, so the probability that the optimal junction box exists in the standard part is low, and the mismatched parts are as low as possible. It is necessary to select parts that are costly.

  If the optimum junction box cannot be selected from the standard parts, it is necessary to design and create a new junction box or to manually branch the junction box of the standard part. It becomes a factor that costs. In particular, the manual setting of the branch setting causes an increase in cost due to an increase in the number of branches.

  This problem applies not only to automobile wire harness design, but also to product design that uses branch parts that branch wires such as signal lines that connect parts.

  The present invention extracts a part most suitable for the connection relation between parts in a product to be designed from parts having different internal connection relations, or outputs information on matching evaluation of the extracted parts to support wiring design. The purpose is to do.

  The above-described object, other objects, features, and advantages of the present invention will become more apparent from the following detailed description of embodiments of the present invention.

Component selecting device which is disclosed as one embodiment of the present invention, for each branch part, and inside the Symbol you store component internal information indicating the internal connection relationship that defines the connection state憶部between the terminals provided in the branch parts , A wiring information acquisition unit for receiving wiring information indicating a connection relation that defines a connection state between terminals used in a design target , and a terminal group and the wiring based on the internal connection relation indicated in the component internal information A matching determination unit that compares the terminal group of the component based on the connection relationship indicated in the information and extracts a branch component in which the terminal group based on the internal connection relationship matches the terminal group of the component based on the connection relationship ;

Further, in the component selection method disclosed as one aspect of the present invention, the computer receives wiring information indicating a connection relationship that defines a connection state between terminals used in a design target , and for each branch component, Referring to inside parts SL you store internal information憶部showing the internal connection relationship that defines a connection state between the terminals a branch part comprises, terminal groups by the internal connection relationship shown in the part inside information And the terminal group of the component based on the connection relationship indicated in the wiring information , and executing a process of extracting a branch component in which the terminal group based on the internal connection relationship matches the terminal group of the component based on the connection relationship It is.

In addition, the component selection program disclosed as one aspect of the present invention receives wiring information indicating a connection relationship that defines a connection state between terminals used in a design target to a computer, and for each branch component, Referring to inside parts SL you store internal information憶部showing the internal connection relationship that defines a connection state between the terminals a branch part comprises, terminal groups by the internal connection relationship shown in the part inside information wherein as shown in the wiring information connection relation is compared with the terminal group of the component by, terminal groups by the internal connection relationship extracting a branch component that matches the terminal group of the component by the connection relationship between, perform the process It is something to be made.

  According to the above-described component selection device, it is possible to select a component optimal for the connection information indicated by the wiring information to be designed from a plurality of components.

It is a figure which shows the block structural example in 1st Example of a components selection apparatus. It is a figure which shows the example of the component internal circuit data in a 1st Example. It is a figure which shows the example of the branch component table in a 1st Example. It is a figure which shows the example of the cost table in a 1st Example. It is a figure which shows the example of the logic circuit data of a design object and circuit table in a 1st Example. It is a figure which shows the example of the comparison table in a 1st Example. It is a figure for demonstrating the conformity determination process with respect to branch component JB1. It is a figure which shows the example of the agreement evaluation information of branch component JB1. It is a figure for demonstrating the conformity determination process with respect to branch component JB2. It is a figure which shows the example of the agreement evaluation information of branch component JB2. It is a figure for demonstrating the conformity determination process with respect to branch component JB3. It is a figure which shows the example of the agreement evaluation information of branch component JB3. It is a figure which shows the example of an output of the result output part 19. FIG. It is a figure which shows the example of the logic circuit of the design object in a 2nd Example. It is a figure which shows the example of the logic circuit data in the 2nd Example, and the example of circuit data. It is a figure which shows the example of the component internal circuit data in a 2nd Example. It is a figure which shows the example of the branch component table of the branch component JB4 in a 2nd Example. It is a figure which shows the example of the comparison table in a 2nd Example. It is a figure which shows typically the mounting position of the components mounted in the vehicle of the design object in a 3rd Example. It is a figure which shows the example of the logic circuit data of the vehicle used as the design object in a 3rd Example. It is a figure which shows the example of the logic circuit data in a 3rd Example. It is a figure which shows the example of the circuit table in a 3rd Example. It is a figure which shows the example of a processing flow of the process by the conformity determination part in an Example. It is a figure which shows the example of a processing flow of the process by the conformity determination part in an Example. It is a figure which shows the example of the hardware constitutions of the components selection apparatus in an Example. It is a figure which shows the example of the wire harness in a vehicle.

  Hereinafter, a component selection device disclosed as one aspect of the present invention will be described.

  In the following embodiments, a process when the disclosed component selection apparatus selects a branch component called a junction box for connecting, branching, and relaying a wire in an automobile wire harness design will be described.

  In the drawings used for the following description, the junction box may be expressed as JB.

  FIG. 26 is a diagram illustrating an example of a wire harness in a vehicle.

  The wire harness is a collective part formed by bundling a plurality of electric wires (wires) used for power supply and signal communication.

  Taking a vehicle as an example, the vehicle includes various electronic control units (ECUs) such as a chassis ECU and a meter ECU, and each ECU performs signal communication as necessary to communicate with other ECUs and the like. Achieve linked control. As shown in FIG. 26, a wire harness of an automobile includes a bundle of wires (signal lines) connecting between ECUs, a connector connecting ECUs and wires, and one branch component that joins, branches, and relays wires (junction box) ) And is designed as one collective part. Therefore, in the wiring harness design of the vehicle, it is necessary to extract a branch component having an internal connection relationship that can realize a branch satisfying the connection relationship between the ECUs from a plurality of standard branch components.

[First embodiment]
FIG. 1 is a diagram showing an example of a block configuration in the first embodiment of the component selection device.

  The component selection device 1 includes a control unit 10 and a storage unit 20.

  The control unit 10 includes a branch part table creation unit 11, a cost information acquisition unit 13, a circuit table creation unit 15, a conformity determination unit 17, and a result output unit 19.

  For each branch component managed as a standard component, the branch component table creation unit 11 branches from the component internal circuit data 3 indicating the internal connection relationship between the terminals in the branch component, and indicates the number of connection groups for each number of terminals. A parts table 21 is created and stored in the storage unit 20.

  The branch component table creation unit 11 acquires the component internal circuit data 3 from, for example, a standard component database, a CAD system, or the like.

  FIG. 2 is a diagram illustrating an example of the component internal circuit data 3.

  The left side of FIG. 2 shows the internal connection relationship between the terminals of the branch parts JB1, JB2, and JB3, and the right side of FIG. 2 shows an example of the component internal circuit data 3 that shows the internal connection relation of the branch parts. FIG.

  The branch parts JB1, JB2, and JB3 have terminals t1 to t6, t1 to t7, and t1 to t8, respectively. A group of terminals connected to each other via a branch in the branch component is defined as one connection group.

  The component internal circuit data 3 associates the connection group number (g) to which each branch component terminal number (t) belongs. For example, the component internal circuit data 3-1 of the branch component JB1 indicates that the terminals t1, t2, and t4 belong to the connection group g1, and the terminals t3, t5, and t6 belong to the connection group g2. Similarly, the component internal circuit data 3-2 of the branch component JB2 indicates that the terminals t1, t2, and t4 belong to the connection group g1, and the terminals t3, t5, t6, and t7 belong to the connection group g2. The internal circuit data 3-3 indicates that the terminals t1, t2, t4, and t5 belong to the connection group g1, and the terminals t3, t6, t7, and t8 belong to the connection group g2.

  FIG. 3 is a diagram illustrating an example of the branch part table 21.

  In the branch component table 21, the number of corresponding connection groups is set for each number of terminals included in the connection group. The initial state of the branch component table 21 is set to 2 to N (integer) in the column “number of terminals”, and “number of connection groups” in each row is set to “0”.

  The branch component table creation unit 11 searches the connection group number for each component internal circuit data 3 of each branch component, extracts the number of terminals, and corresponds to the number of terminals in the branch component table 21 that matches the extracted number of terminals. Add 1 to the number of connected groups. For example, when the branch part table creation unit 11 retrieves the part internal circuit data 3-2 of the branch part JB2 with connection group number = 1 and extracts three terminals, the branch part corresponding to the part internal circuit data 3-2 is obtained. The initial value “0” of “number of connection groups” of the number of terminals = 3 in the table 21-2 is set to “1”. Further, when the branch component table creation unit 11 searches the component internal circuit data 3-2 with the connection group number = 2 and extracts four terminals, the “connection” corresponding to the number of terminals = 4 in the branch component table 21-2. Set “0” in “Number of groups” to “1”. In the branch component table 21-2 shown in FIG. 3, the number of connection groups with the number of terminals = 3 is “1”, the number of connection groups with the number of terminals = 4 is “1”, and the number of connection groups with the other number of terminals. Indicates “0”. Further, in the branch part table 21-1 created from the part internal circuit data 3-1 of the branch part JB2, the number of connection groups with the number of terminals = 3 is “2”, and the number of connection groups with the number of other terminals is “2”. In the branch component table 21-3 created from the component internal circuit data 3-3 of the branch component JB3, “0” indicates that the number of terminals = 4 and the number of connection groups is “2”. Indicates that the number of connection groups is “0”.

  The branch part table creation unit 11 creates a branch part table 21 for all branch parts managed as standard parts.

  The cost information acquisition unit 13 receives cost data 4 relating to various costs for each branch component managed as a standard component via an input device, a communication device, etc., and sets one or more costs for each branch component. A cost table 22 is created and stored in the storage unit 20. The cost included in the cost data 4 is information such as the manufacturing cost, weight, and size of the branch part.

  FIG. 4 is a diagram illustrating an example of the cost table 22. In the cost table 22 shown in FIG. 4, the manufacturing cost (yen) for each branch part is recorded as the cost.

  The circuit table creation unit 15 receives logic circuit data 5 indicating logic circuit information of the vehicle to be designed. The logic circuit data 5 includes at least wiring information indicating connection information between components mounted on the vehicle to be designed.

  The circuit table creation unit 15 groups terminal groups of components to be connected from the received logic circuit data 5 based on the connection relationship between components mounted on the vehicle, and shows a circuit table 23 indicating the number of connection groups for each number of terminals. Is created and stored in the storage unit 20.

  FIG. 5 is a diagram showing an example of logic circuit data to be designed and a circuit table.

  FIG. 5A is a diagram illustrating an example of a connection relationship between components included in the logic circuit information of the vehicle to be designed.

  In the example shown in FIG. 5A, five parts PartA, B, C, D, and E are mounted on the vehicle to be designed, and the terminal t1 of the part PartA and the terminal t1 of the part PartB. Group, terminal part t2 of component Part A3, terminal group of component Part B with terminal t2, terminal part t of component Part A4, terminal group of components Part C, D, E and terminal t1 form a connection group, respectively. .

  FIG. 5B is a diagram illustrating an example of the logic circuit data 5 indicating the connection relation included in the logic circuit information.

  The logic circuit data 5 in FIG. 5B has data items of a part name, a terminal number (t) of a terminal included in the part, and a connection group number (g) to which the terminal belongs, and the connection group number to which each terminal belongs. Is set.

  FIG. 5C is an example of the circuit table 23 generated from the logic circuit data 5 shown in FIG.

  In the circuit table 23, the number of connection groups having the corresponding number of terminals is recorded for each number of terminals included in the connection group. As an initial state of the circuit table 23, 3 to N (integer) is set in the “number of terminals” column, and the number of connection groups is set to “0”. The circuit table 23 does not record the connection relationship including no branch, that is, the number of connection groups having two terminals.

  The circuit table creation unit 15 searches the logic circuit data 5 by the connection group number and extracts the number of terminals. If the number of extracted terminals is 3 or more, the number of terminals of the circuit table 23 that matches the extracted number of terminals. Is added to the number of connection groups corresponding to.

  The conformity determination unit 17 compares the connection relationship of the vehicle to be designed with the internal connection relationship of the branch component managed as a standard component, and extracts a branch component that matches the connection relationship of the design target. Furthermore, the conformity determination unit 17 generates match evaluation information 6 regarding the match evaluation of the extracted branch parts.

  Therefore, the conformity determination unit 17 includes a difference creation unit 171, a surplus circuit processing unit 172, and a short circuit processing unit 173.

  The difference creating unit 171 compares the branch component table 21 and the circuit table 23 of each branch component, and the connection relationship between the parts of the vehicle to be designed indicated by the circuit table 23 and the inside of each branch component indicated by the branch component table 21. A comparison table 24 showing a difference from the connection relationship is generated for each branch part.

  FIG. 6 is a diagram illustrating an example of the comparison table 24.

  The comparison table 24 includes data items such as the number of terminals, the number of connected groups, the difference in the number of groups, the number of free terminals, and the number of insufficient branches.

  “Number of connection groups” indicates the number of connection groups for each number of terminals in the branch component table 21. The “group number difference” indicates a difference (excess or deficiency) between the number of connection groups for each number of terminals in the circuit table 23 indicating the connection relationship to be designed and the number of connection groups in the branch component table 21. A value “0” of “group number difference” indicates that the number of connection groups in the branch component table 21 is the same (match) as the number of connection groups in the circuit table 23. The “positive” value of “group number difference” indicates that the number of connection groups in the branch component table 21 is larger than the number of connection groups in the circuit table 23 (excess), and the “negative” value indicates that the branch component table 21 This indicates that the number of connection groups is less (insufficient) than the number of connection groups in the circuit table 23.

  The “number of unused terminals” indicates the number of unused (unconnected) terminals generated by an excess connection group. “Number of insufficient branches” indicates the number of terminals required for connection, which is caused by the number of connection groups that are insufficient.

  Further, the difference creating unit 171 checks whether the “group number difference” of each row of the comparison table 24 is “0”, and if the “group number difference” of all the rows is “0”, the branch component Branch parts corresponding to the table 21 are extracted. If the “group number difference” of all the rows in the comparison table 24 is “0”, the internal connection relationship of the branch component indicated by the branch component table 21 completely matches the connection relationship of the design object indicated by the circuit table 23. Because.

  The surplus circuit processing unit 172 checks whether or not an insufficient connection group can be replenished with a surplus connection group when the “group number difference” of each row of the comparison table 24 is not “0”. A branch part JB corresponding to the table 21 is extracted.

  When the shortage connection group cannot be replenished with a surplus connection group, the shortage circuit processing unit 173 further minimizes the remaining shortage when the shortage connection group is replenished with a surplus connection group. The branch part JB corresponding to 21 is extracted.

  The result output unit 19 outputs the branch parts extracted by the conformity determination unit 17 and the match evaluation information 6 to a display device, a printing device, or the like.

  The block configuration of the component selection apparatus 1 described above is the same in the other embodiments described below.

  Next, the process of the conformity determination unit 17 in the first embodiment will be described more specifically.

  FIG. 7 is a diagram for explaining the conformity determination process for the branch part JB1.

  In the first embodiment, it is assumed that branch parts JB1, JB2, and JB3 are prepared as standard parts. Further, the branch part table creation unit 11 and the circuit table creation unit 15 make the branch part tables 21-1, 21-2, 21-3 corresponding to the branch parts JB1, JB2, JB3, and the circuit table of the vehicle to be designed. 23 are generated and stored in the storage unit 20.

  FIG. 7A is a diagram illustrating an example of the circuit table 23 indicating the connection relationship of the design target and the branch component table 21-1 of the branch component JB1.

  The difference creating unit 171 records the “connection group number” of the number of terminals in the branch component table 21-1 of FIG. 7A in the “connection group number” of the comparison table 24-1, and the branch component table 21-1. And the difference in “number of connected groups” for each number of terminals between the circuit table 23 and the circuit table 23 are obtained and recorded in the “group number difference” of the comparison table 24-1.

  FIG. 7B is a diagram showing an example of the comparison table 24-1 in which “number of connected groups” and “group number difference” are recorded.

  In the comparison table 24-1 in FIG. 7B, the number of terminals = 3 in the branch component table 21-1 is “2”, and the number of terminals in the circuit table 23 = 3 is “1”. Therefore, the difference creating unit 171 records the difference “1 (surplus)” in the “group number difference”. Similarly, the difference creating unit 171 records the difference “−1 (insufficiency)” in the “group number difference” for the number of connection groups with the number of terminals = 4.

  Next, the difference creating unit 171 checks whether or not all the “group number difference” values in each row (number of terminals) of the comparison table 24 are “0”. When all of the “group number difference” values are “0”, the excess circuit processing and the insufficient circuit processing are not required, and the internal connection relationship of the branch part JB and the connection relationship of the design object are completely matched. It is extracted as a branch part JB suitable for the object.

  However, in the comparison table 24-1 shown in FIG. 7B, the values of “group number difference” are not all “0”, and therefore, excess circuit processing or insufficient circuit processing is executed.

  In surplus circuit processing, a check is made as to whether or not a connection group that is insufficient with respect to the connection relationship to be designed can be replenished using a surplus connection group having more terminals than its branch. Due to the extra circuit processing, if the 4-terminal branch at the branch part is vacant for the connection relationship to be designed and the 3-terminal branch is insufficient, the 4-terminal branch is used instead of the 3-terminal branch. Judgment is possible and the compatibility of the branch parts can be evaluated. Therefore, branch parts that do not cause branch addition outside the branch parts and the matching evaluation information thereof can be presented to the designer, and the decision of the branch parts in the wiring design can be supported.

  In the short circuit processing, a branch state is determined when a connection group that is insufficient with respect to the connection relationship to be designed is supplemented using a connection group having a smaller number of terminals than that branch. Due to insufficient circuit processing, if a 3-terminal branch in the branch part is vacant for the connection relationship to be designed, but a 4-terminal branch is insufficient, a 3-terminal branch is added to supplement the 4-terminal branch. It is possible to evaluate the compatibility of branch parts by determining the number of additional terminals that can be used. Therefore, it is possible to present the branch part with a small number of branch additions outside the branch part and the matching evaluation information thereof to the designer, thereby supporting the determination of the branch part in the wiring design.

  The surplus circuit processing unit 172 calculates the product of the number of terminals and the difference in the number of groups in the “number of available terminals” of each row of the comparison table 24-1, and if the product is positive, the product is added to the “number of available terminals”. If it is negative, it is recorded in “Insufficient number of branches”. For example, as shown in the comparison table 24-1 in FIG. 7C, the surplus circuit processing unit 172 has a “group number difference” of “1 (surplus)” in the row of the number of terminals = 3 in the comparison table 24-1. Therefore, “3 (3 × 1)” is recorded in the “number of empty terminals”, and the “group number difference” in the row of the number of terminals = 4 is “−1 (insufficient)”. "-4 (4 × -1)". Therefore, in the comparison table 24-1 in FIG. 7C, when the internal connection relationship of the branch part JB1 is applied to the connection relationship to be designed, there is one more branch of 3 terminals and 1 branch of 4 terminals. This indicates that there is a shortage.

  The surplus circuit processing unit 172 checks the value of the “group number difference” in order from the row with the largest “number of terminals” in the comparison table 24-1 shown in FIG. , Detects a line with insufficient branching (a line with a negative “group number difference” value) and sets it as a search line. Further, the surplus circuit processing unit 172 examines the “group number difference” of each row in ascending order of the number of terminals from the search row (downward from the search row), and determines the value of the “group number difference” in which the branch is redundant Is a “positive” line) and sets it to the corresponding line. The reason for obtaining the relevant rows in ascending order of the number of pins for the rows that have more pins than the search row is the branch (connection) with a closer number of pins instead of the branch (connection group) that is insufficient for the connection relationship of the design target. This is to eliminate the waste of the number of terminals at the branch used as a substitute.

  In the comparison table 24-1 in FIG. 7C, since the corresponding row (number of terminals = 5 or more) cannot be detected after the search row (number of terminals = 4), the surplus circuit processing unit 172 performs the surplus circuit processing. End and pass processing to the short circuit processing.

  The shortage circuit processing unit 173 checks the value of the “group number difference” sequentially from the row (for example, maximum value = 2) with the smallest “number of terminals” in the comparison table 24-1 shown in FIG. Detect missing lines (lines with negative “group number difference”) and set them as search lines. Furthermore, the shortage circuit processing unit 173 examines the “group number difference” of each row in ascending order of the number of terminals from the search row (upward from the search row), and determines the value of the “branch group difference” Is detected as a corresponding row. Finding the corresponding row in descending order of the number of terminals for the line with fewer terminals than the search line is the branch (connection) that is closer to the number of terminals (connection group) that is insufficient for the connection relation of the design target. This is to reduce the number of terminals that cannot be replenished by using (Group).

  The insufficient circuit processing unit 173 supplements the “insufficient branch count (−4)” of the search line with the “vacant terminal count (3)” of the corresponding line, and the number of insufficient terminals (−1) remaining after the supplementation of the corresponding line. Record in “Number of missing branches”, and set “Number of missing branches” in the supplemented search line to “0”.

  FIG. 7E is an example of the comparison table 24-1 that shows an example of the result of processing by the short circuit processing unit 173. The comparison table 24-1 in FIG. 7E indicates that in the case of the branch part JB1, two three-terminal branches are used, but one terminal is insufficient.

  The conformity determination unit 17 generates match evaluation information 6 for the branch part JB1 based on the result of the conformity determination process after the surplus circuit processing and the insufficient circuit processing.

  The match evaluation information 6 includes, for example, an assumed cost, a surplus capacity, and a shortage number.

  The assumed cost is a total value of the cost of the branch part JB based on the cost table 22 and the branch additional cost. The branch addition cost is calculated from the splice cost and the number of insufficient branches. The splice cost is a cost for adding one branch. For example, a value such as “@ 100 yen” is held in the conformity determination unit 17 in advance.

  The surplus capacity indicates the number of terminals that are surplus with respect to the connection relation to be designed in the internal connection relation of the branch part JB, and is the total of the “number of free terminals” in the comparison table 24. The shortage number indicates the number of terminals that are deficient with respect to the design target connection relation in the internal connection relation of the branch parts, and is the total of the “number of shortage branches” in the comparison table 24.

  FIG. 8 is a diagram illustrating an example of the match evaluation information of the branch part JB1.

  Based on the processing result of the branch part JB1, the conformity determination unit 17 matches the evaluation information “assumed cost = JB1 cost (2,000) + additional branch cost (@ 100 × 1); surplus capacity = 0; shortage number = 1”. Is generated.

  The match evaluation information 6 can include various cost information recorded in the cost table 22 of the storage unit 20.

  FIG. 9 is a diagram for explaining the conformity determination process for the branch part JB2.

  FIG. 9A shows an example of the branch part table 21-2 and the circuit table 23 of the branch part JB2.

  The difference creating unit 171 generates the comparison table 24-2 of the branch part JB2 from the branch part table 21-2 and the circuit table 23 of FIG. 9A in the same manner as the process described with reference to FIG. Then, calculate the difference in the number of connected groups for each number of terminals and record it in the “group number difference”.

  Next, the difference creating unit 171 checks whether or not all the “group number difference” values in each row (number of terminals) of the comparison table 24 are “0”.

  The example of the comparison table 24-2 illustrated in FIG. 9B is generated from the branch component table 21-2 and the circuit table 23 illustrated in FIG. In the comparison table 24-2 shown in FIG. 9B, the value of “group number difference” for all the numbers of terminals is “0”.

  The difference creating unit 171 extracts the branch part JB2 because the values of the “group number difference” are all “0”. Therefore, the excess circuit process and the insufficient circuit process for the branch part JB2 are not executed.

  The conformity determination unit 17 generates match evaluation information 6 based on the result of the conformity determination process for the extracted branch part JB2.

  FIG. 10 is a diagram illustrating an example of the match evaluation information of the branch part JB2.

  The match evaluation information 6 of the branch part JB2 is “assumed cost = JB2 cost (2,500); surplus capacity = 0; shortage number = 0”.

  FIG. 11 is a diagram for explaining the conformity determination process for the branch part JB3.

  FIG. 11A is a diagram illustrating an example of the branch part table 21-3 and the circuit table 23 of the branch part JB3.

  Similar to the processing described above with reference to FIG. 7A, the difference creating unit 171 generates the comparison table 24-3 for the branch component JB3 from the branch component table 21-3 and the circuit table 23 in FIG. Generate and record the difference in the number of connected groups for each number of terminals in the “Group number difference”.

  FIG. 11B is a diagram showing an example of the comparison table 24-3 generated from the branch component table 21-3 and the circuit table 23 of FIG. In the branch component table 21-3, the difference in the number of connection groups with the number of terminals = 3 is “−1 (insufficient)”, and the difference in the number of connection groups with the number of terminals = 4 is “1 (surplus)”.

  The difference creating unit 171 checks whether all the values of “group number difference” in each row (number of terminals) of the comparison table 24 are “0”. In the comparison table 24-3, since the values of “group number difference” are not all “0”, surplus circuit processing and insufficient circuit processing are executed.

  The surplus circuit processing unit 172 multiplies the “number of terminals” and the “group number difference” in the comparison table 24-3 to calculate the number of terminals that are surplus or insufficient.

  As shown in the comparison table 24-3 in FIG. 11C, the surplus circuit processing unit 172 records a value in “the number of insufficient terminals” because the product (−3) is negative for the number of terminals = 3. , Since the product (4) is positive, the number of terminals = 4 is recorded in the “number of terminals”.

  Next, the surplus circuit processing unit 172 checks the value of “group number difference” in order from the line with the largest “number of terminals” in the comparison table 24-3 shown in FIG. (Line with negative “group number difference”) is detected and set as a search line. Further, the surplus circuit processing unit 172 examines the “group number difference” of each line in the downward direction from the search line, that is, in ascending order from the number of terminals of the search line. Is a “positive” line) and sets it to the corresponding line.

  The surplus circuit processing unit 172 supplements the “insufficient number of branches” of the search line with the “number of empty terminals” of the corresponding line, and subtracts the number of insufficient branches (3) supplemented from the number of empty terminals (4) (1 ) Is recorded in the “number of empty terminals (1)” of the corresponding line, and the “number of insufficient branches” of the search line is recorded in “0”.

  FIG. 11D is an example of the comparison table 24-3 that shows an example of the result of processing of the surplus circuit processing unit 172. The comparison table 24-3 in FIG. 11D indicates that in the case of the branch part JB3, two 4-terminal branches are used, and one of the branches is left (empty).

  After that, the shortage circuit processing unit 173 checks the negative value from the “group number difference” in the comparison table 24-3, but the value is “0” for all the numbers of terminals and does not detect the negative value. The shortage circuit processing for the table 24-3 is terminated.

  The conformity determination unit 17 generates match evaluation information 6 for the branch part JB3 based on the result of the conformity determination process after the shortage circuit processing ends.

  FIG. 12 is a diagram illustrating an example of the match evaluation information of the branch part JB3.

  The match evaluation information 6 of the branch part JB3 is “assumed cost = JB3 cost (3,000); surplus capacity = 1; shortage number = 0”.

  After conformity determination processing is performed for each branch component table 21 stored in the storage unit 20 by the conformity determination unit 17 or after conformity determination processing is performed for all of the branch component tables 21, the result output unit 19 outputs match evaluation information 6 of each branch part to a display device, a printing device or the like as result information of the conformity determination processing.

  FIG. 13 is a diagram illustrating an output example of the result output unit 19.

  The result output unit 19 outputs the match evaluation information 6 for one or a plurality of branch parts JB extracted by the matching determination unit 17. In the output example of the result output unit 19 shown in FIG. 13, when each branch part JB is used for the connection relationship of the design object in the order of the estimated cost of the match evaluation information 6 in the order of the branch parts JB2, JB1, JB3. A wiring example and match evaluation information 6 are displayed.

  By outputting the match evaluation information 6 (wiring and cost information of each branch part), the designer can know the estimated cost of the branch part JB that matches the connection relationship of the design target.

[Second Embodiment]
In automotive harness design, the attributes of connected terminals may be set as design constraints. For example, the type of terminal plating, the size of the wire diameter, and the like are design constraints.

  The component selection device 1 can perform the compatibility determination process of the branch component JB using the information of the branch component JB corresponding to the design constraint condition.

  In the second embodiment, the component selection device 1 performs conformity determination including a restriction condition in which presence / absence of gold plating of terminals is set as conformity determination of the connection relationship.

  FIG. 14 is a diagram illustrating an example of a logic circuit to be designed in the second embodiment.

  The logic circuit of the vehicle to be designed in the second embodiment has the same connection relationship as the logic circuit shown in FIG. 5A, but the terminals t2 and t3 of the part PartA and the terminal t2 of the part PartB are gold-plated terminals. Is given. Further, it is assumed that a condition that the terminal of the branch part JB connected to the gold-plated terminal of the part is gold-plated is set as a design constraint condition.

  The circuit table creation unit 15 of the component selection device 1 acquires the logic circuit data 5 ′ including information on the presence / absence of gold plating and generates a circuit table 23 ′.

  FIG. 15 is a diagram illustrating an example of logic circuit data and an example of circuit data.

  FIG. 15A is an example of the logic circuit data 5 'to be designed shown in FIG.

  The logic circuit data 5 ′ further includes “gold plating” indicating the presence or absence of gold plating in the data structure of the logic circuit data 5 shown in FIG. A value “none” of “gold plating” indicates that the terminal is not gold-plated, and “present” indicates that the terminal is gold-plated.

  The circuit table creation unit 15 divides the connection relation into groups based on the number of terminals and the presence / absence of gold plating of the terminals from the logic circuit data 5 ′, calculates the number of groups (number of connection groups), and stores it in the circuit table 23 ′. Record.

  FIG. 15B is an example of the circuit table 23 ′ generated from the logic circuit data 5 ′ in FIG. The circuit table 23 ′ further includes a data item “gold plating” in the data structure of the circuit table 23 of FIG.

  The branch component table creation unit 11 acquires the component internal circuit data 3 including information on the presence / absence of gold plating, and generates a branch component table 21.

  The branch component table creation unit 11 divides the internal connection relationship of the branch component JB4 into groups based on the number of terminals and the presence / absence of gold plating of the terminals, and calculates the number of connection groups.

  FIG. 16 is a diagram illustrating an example of component internal circuit data.

  FIG. 16A shows the internal connection relationship of the branch component JB4, and FIG. 16B is an example of the component internal circuit data 3-4 showing the internal connection relationship of the branch component JB4. The component internal circuit data 3-4 in FIG. 16B shows that the branch component JB4 has the terminals t1, t2, and t4 that are not gold-plated in the connection group g1, and the gold-plated terminals t3, t5, and t6 in the connection group g2. It shows that it belongs.

  FIG. 17 is a diagram illustrating an example of the branch part table 21-4 of the branch part JB4.

  The branch part table 21-4 further includes a data item of “gold plating” in the data structure of the branch part table 21 shown in FIG.

  The branch part table creation unit 11 also creates a branch part table having a data item of “gold plating” similar to the branch part table 21-4 for the branch parts JB1, JB2, and JB3.

  Further, the cost information acquisition unit 13 acquires the cost data 4 including the cost information of the branch part JB4 and generates the cost table 22.

  The difference creating unit 171 creates the comparison table 24-4 based on the branch component table 21-4 and the circuit table 23.

  FIG. 18 is a diagram illustrating an example of the comparison table 24-4.

  The comparison table 24-4 further includes a data item “gold plating” in the data structure of the comparison table 24 shown in FIG.

  The difference creating unit 171 calculates the difference in the number of connected groups based on the same number of terminals and the value of gold plating (presence / absence), and records the difference in the “group number difference”.

  The processing after the comparison table 24-4 is created in the conformity determination unit 17 and the processing of the result output unit 19 are substantially the same as the processing described in the first embodiment, and thus description thereof is omitted.

  In the surplus circuit processing and the short circuit processing in the second embodiment, a judgment condition as to whether or not to allow branching of terminals having different attributes to be used as a shortage branch is preset in the conformity judgment unit 17. And For example, a condition is set such that a short branch can be supplemented only by a branch with a terminal having the same attribute, a branch having a gold plating “present” can be supplemented with a branch having no gold plating.

  In the above description of the second embodiment, the processing in the case where the information on the presence / absence of gold plating is used as the terminal attribute has been described, but the same processing is also performed when there is a constraint on the wire diameter. In this case, as the branch component table 21, the circuit table 23, and the comparison table 24, a table including a data item indicating the classification of the wire diameter is generated instead of “gold plating”.

[Third embodiment]
In vehicle harness design, if the connections between parts are combined into one branch part, depending on the mounting position of the branch part and the part, the wire length between the connected parts becomes longer by using the branch part. A state occurs that increases the overall cost of the wire harness.

  FIG. 19 is a diagram schematically showing the mounting positions of components mounted on the vehicle to be designed.

  In the vehicle to be designed, the area where the parts are mounted is divided into four parts: encopa (engine compartment), instrument panel, floor, and rear. In the example of FIG. 19, the parts PartA and C are mounted on the instrument panel, the part PartB is mounted on the encoder, and the parts PartE and D are mounted on the rear. Also, the designation of the mounting area of the branch part JB is set in advance in the circuit table creation unit 15, and here, the branch part JB is assumed to be mounted on the instrument panel.

  Accordingly, in the example of the mounting position shown in FIG. 19, if the branch on the wiring of the parts PartE and D mounted on the rear is provided outside the branch part JB mounted on the instrument panel, the wire length can be shortened. Cost can be reduced.

  In the third embodiment, assuming that the cost of the branch outside the branch part is lower, a branch in an area different from the mounting area of the branch part JB is assumed. Then, the component selection device 1 uses the information related to the area where the component is mounted to generate a connection relationship excluding a branch between components mounted in an area different from the mounting region of the branch component from the connection relationship of the design target. The conformity determination process is performed.

  FIG. 20 is a diagram illustrating an example of logic circuit data of a vehicle to be designed.

  FIG. 20 is a diagram illustrating an example of a logic circuit of a vehicle to be designed in the third embodiment. The logic circuit in FIG. 20 has the same connection relationship as that of the logic circuit shown in FIG. 5A, but it is assumed that information on an area in which each component is mounted is given. In the logic circuit shown in FIG. 20, the mounting areas of the parts PartA, B, C, D, and E correspond to the example shown in FIG.

  FIG. 21 is a diagram illustrating an example of the logic circuit data 5 ″.

  The logic circuit data 5 ″ shown in FIG. 21A is the logic circuit data 5 ″ corresponding to the logic circuit shown in FIG. 20. The logic circuit data 5 ″ shown in FIG. Includes “mounting area” that indicates the area to be mounted. The “mounting area” value “instrument panel, encopa, rear, floor” or the like indicates an area in the vehicle shown in FIG.

  The circuit table creation unit 15 of the component selection device 1 acquires the logic circuit data 5 ″ including the mounting area information, and the components in the mounting area other than the mounting area (instrument panel) of the branch component JB have the same connection group and the same. In the logic circuit data 5 ″ shown in FIG. 21A, the parts PartD and E of the row numbers (No) 8 and 9 are retrieved. Is applicable. FIG. 21B is a diagram illustrating an example of the logic circuit data 5 ″ after removing the corresponding connection relationship.

  The circuit table creation unit 15 generates a circuit table 23 ″ based on the logic circuit data 5 ″ shown in FIG.

  FIG. 22 is a diagram illustrating an example of the circuit table 23 ″. The circuit table 23 ″ has the same configuration as the circuit table 23 illustrated in FIG.

  Therefore, the difference creating unit 171 generates the comparison table 24 based on the circuit table 23 ″ and the branch component table 21 of FIG.

  Since the processing after the comparison table 24 is created in the conformity determination unit 17 and the processing of the result output unit 19 are substantially the same as the processing described in the first embodiment, the description thereof is omitted.

  23 and 24 are diagrams illustrating an example of a processing flow of processing performed by the conformity determination unit 17 in the embodiment.

  The difference creating unit 171 of the conformity determination unit 17 acquires the circuit table 23 corresponding to the connection relationship of the design target from the storage unit 20 (step S1), and acquires the branch component table 21 of the branch component that is the target of conformity determination. (Step S2). The difference creating unit 171 generates the comparison table 24 and transcribes the acquired branch component table information (step S3).

  Next, the difference creating unit 171 obtains the number of connected groups in the row having the same number of terminals from the circuit table 23 and the branch component table 21 and records the difference in the number of groups in the “group number difference” of the comparison table 24 ( Step S4).

  Further, the difference creating unit 171 multiplies the terminal number and the group number difference for each row to calculate “the number of empty terminals” and “the number of insufficient branches” (step S5).

  The surplus circuit processing unit 172 sets the row having the “number of terminals” of the “maximum number−1” in the comparison table 24 (the row immediately above the last row) as the search row (step S6), and sets the “group number difference” of the search row. "Is negative (step S7). If the “group number difference” in the search row is not negative (N in step S7), the surplus circuit processing unit 172 proceeds to the process in step S11, and if the “group number difference” in the search row is negative (step S7). Y), the process proceeds to step S8.

  In the process of step S8, the surplus circuit processing unit 172 sequentially searches whether the value of the “group number difference” is positive from the line below the search line, and if there is a corresponding line (corresponding line) (step S9). Y), subtract the number of “insufficient branches” in the search line from the “number of empty terminals” in the corresponding line, record the difference in the “number of empty terminals” in the relevant line, and set “0” in the “number of missing branches” in the search line. "Is recorded (step S10).

  If there is no corresponding line in the search process in step S8 (N in step S9), the surplus circuit processing unit 172 sets a line one above the current search line as a new search line (step S11).

  If the processing as the search row has not been completed for all the rows in the comparison table 24 (N in step S12), the surplus circuit processing unit 172 returns to the processing in step S7 and repeats the processing. On the other hand, if the processing as the search row has been completed for all the rows in the comparison table 24 (Y in step S12), the insufficient circuit processing unit 173 takes over the processing and proceeds to the processing in step S13.

  In the processing flow of FIG. 24, the shortage circuit processing unit 173 sets the search table to be the row where the “number of terminals” in the comparison table 24 is “2” (the row immediately below the first row) (step S13). It is determined whether the value of “group number difference” is negative (step S14). If the “group number difference” in the search line is not negative (N in step S14), the process proceeds to step S18. If the “group number difference” in the search line is negative (Y in step S7), the process proceeds to step S15. Proceed to processing.

  In step S15, the shortage circuit processing unit 173 sequentially searches whether the “group number difference” value is positive from the row above the search row, and if there is a corresponding row (corresponding row) (step S16). Y), subtract “number of empty terminals” in the relevant line from “number of missing branches” in the search line, record the difference in “number of insufficient branches” in the search line, and set “0” in the “number of empty terminals” in the relevant line. "Is recorded (step S17).

  If there is no corresponding line in the search process in step S15 (N in step S16), the shortage circuit processing unit 173 sets the line immediately below the current search line as a new search line (step S18).

  If the processing as the search row has not been completed for all the rows in the comparison table 24 (N in step S19), the short circuit processing unit 173 returns to the processing in step S14 and repeats the processing. On the other hand, if the processing as the search row has been completed for all the rows of the comparison table 24 (Y in step S19), the conformity determination unit 17 generates match evaluation information (step S20) and performs the processing. finish.

  FIG. 25 is a diagram illustrating an example of a hardware configuration of the component selection device 1 in the embodiment.

  The component selection device 1 can be implemented as a computer 100 shown in FIG. The computer 100 includes, for example, a processing unit (CPU: Central Processing Unit) 101, a memory 102, an input device 103, an output device 104, an external storage device 105, a network connection device 106, a medium driving device 107, and the like. Is connected to the bus 108.

  The CPU 101 controls the entire computer 100. The memory 102 is a RAM (Random Access Memory) or the like that temporarily stores programs and data stored in the external storage device 105 or a portable data storage medium in processing such as program execution and data update. The memory 102 temporarily stores an OS (Operating System) program to be executed by the CPU 101, an application program, and at least a part of various data necessary for processing by the CPU 101.

  The input device 103 is, for example, a keyboard, a mouse, a touch panel, or the like. The output device 104 is a display, for example. The external storage device 105 is, for example, a hard disk device. The external storage device 105 stores programs and data.

  The network connection device 106 is connected to a network such as the Internet, and transmits / receives data to / from an information processing system such as an external CAD system.

  The medium driving device 107 reads programs and data stored in the portable storage medium. The portable storage medium is, for example, a medium such as an FD (flexible disk), a CD-ROM, a DVD, or a magneto-optical disk.

  The CPU 101 of the computer 100 executes various processes including the process shown in the above-described embodiment of the component selection device 1 using the program and data read out to the memory 102.

  That is, the branch part table creation unit 11, the cost information acquisition unit 13, the circuit table creation unit 15, the conformity determination unit 17, and the result output unit 19 of the control unit 10 of the component selection device 1 can be configured by programs. Are loaded into the memory 102 and executed by the CPU 101, thereby realizing each function of the processing unit of the component selection device 1.

  The storage unit 20 and the like are realized by the memory 102 and the external storage device 105.

  Note that the programs and data for realizing the processes and functions of the component selection device 1 do not necessarily have to be stored in the external storage device 105, but the programs and data stored in the portable storage medium are stored in the medium drive device. The data may be read by 107 and stored in the memory 102. Furthermore, the network connection device 106 may acquire the above-described program and data stored in another computer or the like via a network such as a public line, the Internet, a LAN, or a WAN.

  As mentioned above, although the component selection apparatus 1 disclosed as one aspect of the present invention has been described in detail, the present invention is not limited to the embodiment described above, and various improvements and modifications are made without departing from the gist of the present invention. Of course.

  According to the component selection apparatus 1 disclosed as one aspect of the present invention, one or a plurality of branch parts that match the connection relationship of the design target are automatically selected from the branch parts prepared as standard parts in the wiring design. Can be extracted. Therefore, the designer can select a branch part to be adopted from the extracted branch parts, and it becomes easier to select a suitable branch part.

  Moreover, according to the component selection apparatus 1, cost information can be output for one or more extracted branch components. Therefore, the designer can select the branch part to be adopted in consideration of the cost of the extracted branch part, and can minimize the total cost of the wire harness.

DESCRIPTION OF SYMBOLS 1 Component selection apparatus 10 Control part 11 Branch part table creation part 13 Cost information acquisition part 15 Circuit table creation part 17 Conformity determination part 171 Difference creation part 172 Surplus circuit processing part 173 Insufficient circuit processing part 19 Result output part 20 Storage part 21 Branch Component table 22 Cost table 23 Circuit table 24 Comparison table 3 Component internal circuit data 4 Cost data 5 Logic circuit data 6 Match evaluation information

Claims (7)

Each branch part, and Symbol store component internal information憶部showing the internal connection relationship that defines a connection state of an internal between the terminals provided in the branch component,
A wiring information acquisition unit that receives wiring information indicating a connection relationship that defines a connection state between terminals used in a design target;
The terminal group based on the internal connection relationship shown in the component internal information is compared with the terminal group of the component based on the connection relationship shown in the wiring information , and the terminal group based on the internal connection relationship is A component selection device comprising: a matching determination unit that extracts a branch component that matches a terminal group . When the terminal group based on the internal connection relationship does not match the terminal group of the component based on the connection relationship , the conformity determining unit determines whether the terminal group based on the internal connection relationship does not match the number of surplus terminals in each terminal group. 2. The component selection device according to claim 1, wherein a branch component that is allocated to a shortage of terminals in each terminal group that does not match among the terminal groups of the component based on the connection relationship is extracted. The conformity determining unit is configured such that the number of terminals that are not matched in the terminal groups that are not matched among the terminal groups of the parts that are connected due to the number of surplus terminals in the terminal groups that are not matched among the terminal groups due to the internal connection relation. 3. The component selection device according to claim 2, wherein a branch component that minimizes the number of unassigned terminals of the component terminal group due to the connection relation is extracted when the component cannot be allocated . A result output unit for outputting the processing result of the conformity determination unit;
Cost information regarding the cost of each of the branch parts is stored in the storage unit,
The said conformity determination part produces | generates the matching evaluation information containing the cost of the said extracted components based on the said cost information as a process result. The Claim 1 thru | or 3 characterized by the above-mentioned. Parts selection device. The conformity determining unit holds a splice cost indicating a cost of a splice to add a branch, and a terminal group based on an internal connection relationship indicated in the component internal information is a terminal group of components based on a connection relationship indicated in the wiring information. The part selection device according to claim 4, wherein the splicing cost of the branch part that supplements the shortage with respect to the part is calculated, and the match evaluation information including the calculated cost of the splice is generated. Computer
Receives wiring information indicating the connection relationship that defines the connection status between the terminals used in the design target,
Each branch part, with reference to the inside of the to that Symbol憶部storing part internal information indicating the internal connection relationship that defines a connection state between the terminals provided in the branch component, the internal indicated in the part inside information comparing the terminal group of the component by the connection relationship shown as terminal group on the wiring information by the connection relation,
A component selection method for executing processing for extracting a branch component in which the terminal group based on the internal connection relationship matches the terminal group of the component based on the connection relationship . Computer
Receives wiring information indicating the connection relationship that defines the connection status between the terminals used in the design target,
Each branch part, with reference to the inside of the to that Symbol憶部storing part internal information indicating the internal connection relationship that defines a connection state between the terminals provided in the branch component, the internal indicated in the part inside information comparing the terminal group of the component by the connection relationship shown as terminal group on the wiring information by the connection relation,
Extracting a branch component terminal groups by the internal connection relationship matches the terminal group of the component by the connection relationship, component selection program for executing the processing.

Images