JP5556616B2 - Electric wire arrangement prediction method, electric wire arrangement prediction apparatus, program, and recording medium - Google Patents

Description

  The present invention relates to a wire placement prediction method for predicting the placement of insulated wires when a plurality of insulated wires to be connected to a connector are bundled with a restraining material to make a wire bundle, and a wire placement prediction device for executing this prediction method, The present invention relates to a program and a recording medium.

  In a harness for a vehicle, several tens of electric wires are bundled. In order to determine a route through which the electric wires pass, it is necessary to know how thick the electric wire bundle is. In addition, since some of the wires generate a large amount of heat, it is necessary to know the position of each wire in the wire bundle in consideration of heat dissipation performance.

  In Patent Literature 1, the total cross-sectional area A and the number Ni of wires are calculated for each wire size in the bundle, and the diameter ratio (or circumference) of the bundle of wires of a single size that is calculated in advance. A method of calculating the bundle diameter using the ratio) ki = bundle diameter / wire diameter is disclosed. The bundle diameter φi of each size is calculated, and the bundle diameter is calculated by applying experimental correction to the bundle diameter φ = Σφi × Ai / A obtained by weighted averaging with the cross-sectional area ratio.

  In Patent Document 2, in order from the thicker electric wires, the two wires are arranged so as to be in contact with each other, and next, the line segment that passes through each center of the electric wire is selected and the line segment closest to the center is selected, and the electric wires at both ends are contacted Thus, a method of calculating a bundle arrangement and a bundle diameter for arranging the next electric wire is disclosed. By repeating this, fine bundle arrangement and bundle diameter are calculated.

JP-A-8-180747 JP 2008-203952 A

Although it is desired to obtain information on the electric wire position by numerical calculation, the method of calculating the bundle diameter described in Patent Document 1 has a problem that information on the arrangement of each electric wire in the bundle cannot be obtained.
In the method of calculating the bundle arrangement and bundle diameter described in Patent Document 2, it is assumed that only a thick electric wire comes outside, and the arrangement condition considering the initial arrangement cannot be handled. Since only the fine state is calculated, it is not possible to calculate the wire arrangement in a structure where the binding force of the bundle is weak or there is a gap. The effect of friction between wires and binding force (internal pressure of restraint material) cannot be simulated. The effect of external force applied to the wire cannot be simulated. Basically, only a circular bundle is assumed, and there is a problem that the electric wire arrangement in an arbitrary bundle structure in an arbitrary wall structure cannot be obtained.

  The present invention has been made in view of the circumstances as described above, and not only the bundle diameter but also the wire arrangement can be obtained, and from any initial electric wire arrangement, an arbitrary restraint wall is provided to form a bundle. It is an object of the present invention to provide an electric wire layout prediction method that can determine the shape, size, and restraining force of the wire, and that can obtain a shape that takes into account dynamic characteristics such as friction and restraining force.

  In the present invention, not only the bundle diameter but also the wire arrangement can be obtained, and the shape, size, and restraint force can be obtained from an arbitrary initial wire arrangement to give an arbitrary restraint wall to form a bundle, and friction An object of the present invention is to provide an electric wire arrangement predicting device capable of obtaining a shape in consideration of mechanical characteristics such as binding force.

  In the present invention, not only the bundle diameter but also the wire arrangement can be obtained, and the shape, size, and restraint force can be obtained from an arbitrary initial wire arrangement to give an arbitrary restraint wall to form a bundle, and friction Another object of the present invention is to provide a program for causing a computer to execute an electric wire arrangement prediction method capable of obtaining a shape in consideration of mechanical characteristics such as binding force.

  In the present invention, not only the bundle diameter but also the wire arrangement can be obtained, and the shape, size, and restraint force can be obtained from an arbitrary initial wire arrangement to give an arbitrary restraint wall to form a bundle, and friction Another object of the present invention is to provide a recording medium recording a program for causing a computer to execute a wire arrangement prediction method capable of obtaining a shape in consideration of mechanical characteristics such as binding force.

Conductor arrangement prediction method according to the first invention, the wire a plurality of insulated wires to be connected to the connector has a circular cross-section, the arrangement of the insulated wire in the case of making a wire bundle by bundling the restraining member, Ru is predicted in the computer In the placement prediction method, the step of determining the initial placement based on the respective positions of the plurality of insulated wires connected to the terminals of the connectors and the radii of the plurality of insulated wires in the computer, the center of the determined initial placement, A step of calculating based on a weighting factor determined in advance by each radius of each insulated wire, a step of mapping conversion of the initial arrangement to a shape determined by the restraint based on the calculated center, and a mapping based on the arrangement of the shape The step of calculating the contact arrangement in which the insulated wires contact each other, and the bundle of wires calculated in the calculated contact arrangement were bundled by the binding material with an arbitrary binding force A step of calculating a constrained arrangement that changes in time series, a step of calculating a force acting on each insulated wire in the calculated restrained placement, and each acceleration acting on each insulated wire based on each calculated acting force A step of calculating, an equation of motion with the center point of each insulated wire as a mass point by each calculated acceleration, a step of calculating a speed and a position vector of each insulated wire by the created equation of motion, each calculated velocity and each position vector, and based on the constrained geometry and the applied force, each of the insulating positional variation of the wire is caused to execute a step of determining whether the converged, if not converged, the at the time the minute time has elapsed characterized Rukoto cycled execute the step of calculating a constrained geometry.

  In the electric wire arrangement prediction method according to the second invention, the force acting on each insulated wire in the restricted arrangement includes a repulsive force from the restraint material of the restricted arrangement to each insulated wire, a contact load between the insulated wires, and It includes a friction load between each insulated wire.

  In the electric wire arrangement prediction method according to the second invention, the force acting on each insulated wire in the restricted arrangement includes the repulsive force from the restraint material in the restricted arrangement to each insulated wire, the contact load between the insulated wires, and each insulation. Includes friction load between wires.

In the wire arrangement prediction method according to the third invention, the step of calculating the contact arrangement is a step of causing the computer to move each insulated wire to the center by a predetermined distance, and when the insulated wires moved by a predetermined distance interfere with each other, the step of causing return either one to the position prior to the predetermined distance moved, the move until it contacts one of the other of the center point direction, the distance the distance of moving subtracted from the predetermined distance, both the tangential the initial placement step of moving in a direction approaching to the center of, when the insulated wire is further interfere in the step of causing return of the one to the position, comprising the steps of Ru is set a short distance from the predetermined distance, was set the insulated wires by iteration from step of moving to the center in a short distance and said Rukoto.

In the electric wire arrangement prediction method according to the third invention, the step of calculating the contact arrangement causes the computer to move each insulated wire by a predetermined distance to the center of the initial arrangement, and when the insulated wires moved by the predetermined distance interfere with each other. after either were returned to the position prior to the predetermined distance moved, it moves until it contacts one obtained by back to the other center point direction. Next, one of the distances obtained by subtracting the moved distance from the predetermined distance is moved in a direction approaching the center of the initial arrangement in the tangential direction of both. If the insulated wire is further interferes, step by back to the position before the one of the predetermined distance, is set a short distance than the predetermined distance, moving the insulated wires into the center of the initial arrangement at a short distance is set Ru iteration to run from.

The electric wire arrangement | positioning prediction method which concerns on 4th invention makes a computer further perform the step which displays the said contact arrangement calculated on a display screen, and the instruction | indication which receives the instruction | indication made into the arrangement | positioning which estimated the displayed contact arrangement. .

The conductor arrangement prediction method according to the fourth aspect of the present invention, the computer, to display the calculated contact disposed on the display screen, an instruction to place the predicted this was displayed contact arrangement, when received from the user, where the process Ru is terminated.

  In the electric wire arrangement prediction method according to the fifth aspect of the present invention, the force acting on each insulated wire in the restrained arrangement includes gravity received by each insulated wire, buoyancy received by each insulated wire from the surrounding medium, and each insulated wire. A force acting by bending from a position connected to the terminal of the connector is included.

  In the electric wire arrangement prediction method according to the fifth aspect of the present invention, the force acting on each insulated wire in the restricted arrangement includes the gravity that each insulated wire receives, the buoyancy that each insulated wire receives from the surrounding medium, and each insulated wire that It includes a force acting by being bent from a position connected to the terminal.

  The electric wire arrangement | positioning prediction method which concerns on 6th invention includes the contact load between each insulated wire resulting from the bending wrinkle which each said insulated wire has in the force which acts on each insulated wire in the said restraint arrangement, It is characterized by the above-mentioned. To do.

  In the electric wire arrangement prediction method according to the sixth aspect of the present invention, the force acting on each insulated electric wire in the restricted arrangement includes a contact load between the insulated electric wires caused by the bending wrinkles of each insulated electric wire.

The electric wire arrangement | positioning prediction apparatus which concerns on 7th invention is a electric wire arrangement | positioning prediction apparatus which estimates the arrangement | positioning of the said insulated wire in the case of bundling the several insulated electric wire which has a circular cross section and connects to a connector with a restraint material, and produces an electric wire bundle. A means for determining an initial arrangement based on a position of each of the plurality of insulated wires connected to each terminal of the connector and a radius of the plurality of insulated wires, and a center of the initial arrangement determined by the means; A means for calculating based on a weighting factor determined in advance by each radius, a means for mapping the initial arrangement to an arrangement of a shape determined by the restraint based on the center calculated by the means, and a mapping conversion by the means A time system in which the means for calculating the contact arrangement in which the insulated wires come into contact with each other based on the arrangement of the shapes, and the wire bundle of the contact arrangement calculated by the means are bundled by the restraining material with an arbitrary restraining force A means for calculating a constraint arrangement that changes with time, a means for calculating a force acting on each insulated wire in the constraint arrangement calculated by the means, and an action on each insulated wire based on each acting force calculated by the means A means of calculating the acceleration to be performed and an equation of motion with the center point of each insulated wire as a mass point are created by each acceleration calculated by the means, and the velocity and position vector of each insulated wire is calculated by the created equation of motion. Means and means for determining whether or not the position variation of each insulated wire has converged based on each velocity and each position vector calculated by the means, and the restraint arrangement and each acting force. If it is determined that it is not, it is configured to return to the means for calculating the constrained arrangement at the time when a minute time has elapsed and to repeat.

A program according to an eighth invention causes a computer to execute a procedure for predicting the arrangement of the insulated wires when a plurality of insulated wires having a circular cross section and connected to a connector are bundled with a restraining material to form a bundle of wires. In the program, the computer determines a position to connect to each terminal of the connector of the plurality of insulated wires, a procedure for determining an initial arrangement based on each radius of the plurality of insulated wires, and a center of the determined initial arrangement, On the basis of the procedure for calculating based on the weighting factor determined in advance by each radius of the insulated wire, on the basis of the calculated center, on the basis of the procedure for mapping and converting the initial arrangement to the arrangement of the shape determined by the restraint, Procedure for calculating the contact arrangement in which the insulated wires contact each other, the time system when the bundle of wires calculated in the calculated contact arrangement is bundled by the binding material with an arbitrary binding force For calculating a constraint arrangement that changes in a manner, a procedure for calculating a force acting on each insulated wire in the calculated constraint arrangement, a procedure for calculating an acceleration acting on each insulated wire based on each calculated force, and a calculation With each acceleration, a motion equation with the center point of each insulated wire as a mass point is created, and the procedure for calculating the speed and position vector of each insulated wire with the created motion equation, each calculated speed and each position vector, and A procedure for determining whether or not the position variation of each insulated wire has converged based on the constraint arrangement and each acting force, and when determining that it has not converged, calculate the constraint arrangement when a minute time has elapsed. It is characterized in that a procedure that is repeatedly executed from the procedure is executed.

  A recording medium according to a ninth aspect records the program described in the eighth aspect.

  The electric wire arrangement prediction method according to the first invention, the electric wire arrangement prediction apparatus according to the seventh invention, the computer operated by the program according to the eighth invention, and the computer reading the recording medium according to the ninth invention have a circular cross section. Predict the arrangement of the insulated wires when a plurality of insulated wires connected to the connector are bundled with a binding material to form a bundle of wires. The means for determining the initial arrangement determines the initial arrangement based on the respective positions of the connectors of the plurality of insulated wires and the respective radii of the plurality of insulated wires, and the means for calculating the center determines the center of the initial arrangement, Calculation is performed based on a predetermined weighting factor by each radius of each insulated wire. Based on the calculated center, the map conversion means maps the initial arrangement to a shape determined by the constraint material, and the means for calculating the contact arrangement determines whether each insulated wire is based on the map-converted shape arrangement. Contact arrangements that contact each other are calculated.

The means for calculating the constrained arrangement calculates the constrained arrangement that changes in a time series when the electric wire bundle of the contact arrangement is bundled with an arbitrary constraining force with the constraining material, and the means for calculating the force Calculate the force acting on the insulated wire. The means for calculating the acceleration calculates the acceleration acting on each insulated wire based on the calculated acting force, and the means for calculating the position vector uses the calculated acceleration to determine the center point of each insulated wire as a mass point. And the velocity and position vector of each insulated wire are calculated from the created equation of motion. When the determining means determines whether the position fluctuation of each insulated wire has converged based on each calculated speed and each position vector, and the constraint arrangement and each acting force, and if it is determined that it has not converged Then, the process returns to the means for calculating the constrained arrangement at the time when the minute time has passed, and the process is repeated.

  According to the electric wire arrangement prediction method according to the present invention, not only the bundle diameter but also the electric wire arrangement can be obtained, and the shape, size, and restriction when an arbitrary restriction wall is provided and bundled from an arbitrary initial electric wire arrangement. The force can be obtained, and the shape considering the mechanical characteristics such as friction and restraining force can be obtained.

  According to the electric wire arrangement predicting device according to the present invention, not only the bundle diameter but also the electric wire arrangement can be obtained, and the shape, size, and restriction when an arbitrary restriction wall is provided and bundled from an arbitrary initial electric wire arrangement. The force can be obtained, and the shape considering the mechanical characteristics such as friction and restraining force can be obtained.

  According to the program according to the present invention, not only the bundle diameter but also the wire arrangement can be obtained, and the shape, size, and restraining force in the case of forming a bundle by giving an arbitrary restraint wall from any initial wire arrangement are obtained. It is possible to cause the computer to execute an electric wire arrangement prediction method that can obtain a shape that takes into account dynamic characteristics such as friction and binding force.

  According to the recording medium of the present invention, it is possible to obtain not only the bundle diameter but also the wire arrangement on the computer that has read this, and from the arbitrary initial wire arrangement to give a bundle by giving any constraint wall The shape, size, and restraining force of the wire can be obtained, and the electric wire arrangement predicting method that can obtain the shape in consideration of mechanical characteristics such as friction and restraining force can be executed.

It is a block diagram which shows schematic structure of the computer which is embodiment of the electric wire arrangement | positioning prediction method, electric wire arrangement | positioning prediction apparatus, program, and recording medium which concern on this invention. It is a flowchart which shows the example of operation | movement of the electric wire arrangement | positioning prediction apparatus which concerns on this invention. It is a flowchart which shows the example of operation | movement of the electric wire arrangement | positioning prediction apparatus which concerns on this invention. It is explanatory drawing for demonstrating operation | movement of the electric wire arrangement | positioning prediction apparatus which concerns on this invention. It is explanatory drawing which shows the example of initial stage electric wire arrangement | positioning. It is explanatory drawing for demonstrating operation | movement of the electric wire arrangement | positioning prediction apparatus which concerns on this invention. It is explanatory drawing for demonstrating the repulsive force from the wall of a restraint structure. It is explanatory drawing for demonstrating the repulsive force and frictional force between electric wires. It is explanatory drawing for demonstrating the weak repulsive force by the bending between electric wires. It is explanatory drawing for demonstrating the force which acts when an electric wire bends from the position connected to the terminal of the connector. It is explanatory drawing which shows the example of the prediction result of the electric wire arrangement | positioning prediction apparatus which concerns on this invention. It is explanatory drawing which shows typically the structure of embodiment of the recording medium based on this invention.

Hereinafter, the present invention will be described with reference to the drawings illustrating embodiments thereof.
(Embodiment 1)
FIG. 1 is a block diagram showing a schematic configuration of a computer 2 which is an embodiment of an electric wire arrangement prediction method, electric wire arrangement prediction apparatus, program, and recording medium according to the present invention.
The computer 2 includes a display unit 10 for displaying an input screen for data and the like for executing the electric wire arrangement prediction method according to the present invention, an operation screen, a prediction result, and the like, and a keyboard 8 and a mouse 9 for input operation. I have.

The computer 2 includes a CPU (Central Processing Unit) 14 and functions as an electric wire arrangement prediction device by executing a program for executing the electric wire arrangement prediction method according to the present invention by the CPU 14. The program can be introduced into the computer 2 from a recording medium such as a CD (Compact Disc) 3. The recording medium may be a DVD (Digital Versatile Disc) or various removable memory cards.
The CD 3 is loaded in the drive 12 and the recorded program is read by the computer 2.

In the computer 2, the CPU 14 inputs and outputs various devices via the bus 17. The drive 12, the display unit 10, the keyboard 8 and the mouse 9 are connected to the bus 17 through the I / O port 11.
In this example, the computer 2 includes a hard disk 13, a ROM 15, and a RAM 16 as recording devices. The CPU 14 inputs and outputs these recording devices via the bus 17, thereby storing necessary data and predicting calculations. Can be executed.

For example, the hard disk 13 includes identification symbols, diameters, weights per unit length, elastic modulus of the covering material, friction coefficient between the covering materials, and the like of a plurality of types of insulated wires (hereinafter referred to as electric wires) constituting the wire bundle. It is possible to store a file in which data necessary for predicting the wire arrangement is recorded. Further, in this file, it is possible to record identification data of a plurality of types of connectors used for manufacturing a harness, data such as terminal arrangement drawings, and characteristic data such as identification symbols of a plurality of restraining materials and elastic modulus. .
The hard disk 13 also stores a program for displaying on the display unit 10 a cross section of a connector, a wire arrangement, a cross section of a constraining structure in which a plurality of electric wires are bundled with a constraining material, and the like.
A GPU (Graphics Processing Unit) 18 that can be used for specific computation is also connected to the bus 17. The GPU 18 may be used to execute part or all of the program.

Below, operation | movement of the electric wire arrangement | positioning prediction apparatus of such a structure is demonstrated, referring the flowchart of FIG.2, 3 which shows it.
The user inputs the identification symbol of the connector 4 to be used as shown in FIG. 4A and designates the identification symbol of the electric wire 6 having a circular cross section to be connected to each terminal of the terminal arrangement diagram a displayed on the display unit 10. Thus, the initial electric wire arrangement as shown in FIG. 4B is displayed on the display unit 10. In the initial electric wire arrangement, the radius of each electric wire 6 is also expressed. Based on the initial electric wire arrangement, the CPU 14 uses a weighting factor based on a predetermined radius (diameter) of each electric wire 6 as shown in FIG. The center (Cx0, Cy0) of the initial electric wire arrangement is calculated (S1). The cross section of the position b where the electric wires 6 are bundled by the restraining material 7 is an electric wire arrangement to be predicted.

When calculating the center (Cx0, Cy0) of the initial electric wire arrangement, the CPU 14 converts the initial electric wire arrangement into a wire arrangement having a shape (here, circular) based on the constraint material to be used based on the calculated center by mapping conversion ( S1).
If the constraining material is a tape, it is converted into a circular electric wire arrangement, and if the constraining material is a square frame, it is converted into a square electric wire arrangement. Also, when converting to a circular electric wire arrangement, as shown in FIG. 6A, if the initial electric wire arrangement is a square, once converted into a square as shown in FIG. 6B, a circular shape as shown in FIG. 6C is obtained. Mapping to.

In the cylindrical coordinate system (r, θ, z), the position of each square wire is represented by a distance r from the center and an angle θ, and after being converted into a circle, the angle θ ′ = (π / 4) It is expressed by tan θ and the distance from the center r ′ = r cos θ ′.
In addition, the diameter W ′ of the electric wire arrangement after being converted into a circle is represented by W ′ = W × 4 / π, assuming that the length of one side of the square is W, and the electric wire arrangement after being converted into a circle Is expressed by πW ′ = 4W.

After converting the wire arrangement into the shape based on the restraint material (S1), the CPU 14 moves the wire placement in the shape based on the restraint material to the center until the wires stop moving due to contact with each other as a pre-processing. A pre-process electric wire arrangement is calculated (S3).
As pre-processing (S3), the CPU 14 first sets a distance Δ for moving each electric wire toward the center (S31), and moves each electric wire by Δ in the direction of the center vector as shown in FIG. 6D (S33). .
The CPU 14 determines whether or not there are those whose positions interfere with each other as a result of moving each electric wire by Δ in the direction of the center vector (S33). If there are those that interfere with each other, either one of them is determined. The electric wire is returned to the original position (S37).

As shown in FIG. 6E, after returning one electric wire to the original position (S37), the CPU 14 detours the electric wire until it comes in contact with the center of the other electric wire, and the distance moved is δ. As a further step, a Δ-δ detour is moved in the direction approaching the center of the wire arrangement that has undergone mapping conversion in the close direction of both (S39).
After executing Steps S37 and S39 for all the interfering wires, the CPU 14 determines whether there is an object that interferes at the detour position of the detoured wire (S41).

If there is something that interferes at the detour position of the electric wire (S41), the CPU 14 returns to the original position before the electric wire is detoured (S43), and all the wires are in contact with each other and do not move It is determined whether or not (S45).
If all the electric wires are not in contact with each other and do not move (S45), the CPU 14 moves each electric wire by Δ in the direction of the center vector (S33).
If all the wires are in contact with each other and do not move (S45), the CPU 14 determines whether Δ is equal to or less than a predetermined value sufficiently smaller than the radius of the wire arrangement after being converted into a circle. If it is equal to or smaller than the predetermined value (S47), the process returns.

If Δ is not less than the predetermined value (S47), CPU sets Δ to ½ (S49) and moves each electric wire by Δ in the direction of the center vector (S33).
The CPU 14 determines whether or not all the wires are in contact with each other and do not move if there is no object whose positions interfere with each other (S35) as a result of moving each wire by Δ in the central vector direction (S33). (S45).
If there is nothing that interferes at the detour position of the electric wire (S41), the CPU 14 determines whether or not all the electric wires are in contact with each other and do not move (S45).

When the CPU 14 returns from the preprocessing (S3), the CPU 14 displays the preprocessed wire arrangement (contact arrangement) calculated in the preprocessing on the display unit 10 (S5), and waits for an operation input from the user.
The CPU 14 displays the preprocessed electric wire arrangement on the display unit 10 (S5), and if the operation input from the user does not instruct the end (S7), the restriction material 7 allows the preprocessed electric wire arrangement to be arbitrarily restrained. An initial restraint structure (constraint arrangement) when bundled by force is set (S9).

When setting the restraint structure, for example, when the pre-processed wire arrangement is a circular bundle, the inner radius Rt of the restraint structure is determined from the outermost wire position (Cxn, Cyn) when viewed from the center (Cx0, Cy0) of the bundle. Set. However, the diameter of the outermost electric wire is φn,
Rt = ((Cxn−Cx0) ² + (Cyn−Cy0) ² ) ^0.5 + 0.5φn
It is.

Next, the CPU 14 defines the wall movement (reduction / enlargement) of the constraint structure in a direction approaching the final shape to be obtained from the initial shape of the set constraint structure (S9), and the minute time dt and minute distance change dR. Is given (S11).
For example, when the electric wire is tied with a tape or the like, the tape inner diameter Rt, which is a restraining structure, is reduced by a minute distance dR.
Rt = Rt−dR
However, the minute distance change dR is set such that dR <0.5 φm with respect to the smallest wire diameter φm.

Next, the CPU 14 calculates a repulsive force (load) from the wall (restraint material) of the restraint structure (S11) changed by the minute distance dR (S13).
For example, the repulsive force ri in the normal direction of the wall is calculated for the electric wire i in which the penetration Δi as shown in FIG. Although the calculation method varies depending on the wire structure, as an example of approximation, the spring constant ki of the wire covering material is
ki = E × L × φi / φi = E × L
Calculate according to However, E is the Young's modulus of the covering material, L is the length of the electric wire (the width of the restraining material), and φi is the diameter of the electric wire i.

In this case, the rebound spring constant kr from the restraining material is equal to the spring constant ki at the time of biting of each electric wire, so kr = ki.
From the above, the repulsive force ri per electric wire length L of the electric wire i penetrating Δi through the restraint material is
ri = LkrΔi (Δi> 0)
ri = L × 0.0 = 0 (Δi ≦ 0)
Is calculated by

Next, the CPU 14 calculates a contact load and a friction load between the wires of the restraint structure (S11) that has changed by a minute distance (S15).
As shown in FIG. 8, when the distance δij between the electric wires is a negative value, that is, when penetration occurs between the electric wires, the repulsive force Pij due to elastic deformation is calculated in the normal direction of the electric wire contact portion, and friction occurs between the electric wires. If so, the frictional force Sij is calculated in the direction along the wire contact portion.

When the spring constant of the covering material of the electric wires i and j is ki and kj, the spring constant kn between the electric wires i and j is calculated by kn = kikj / (ki + kj).
However, ki = E × L × φi / φi = E × L
E is the Young's modulus of the coating material, L is the wire length (width of the restraint material), and φi is the diameter of the wire i.

The distance between the electric wires i and j is δij, and the relative velocity between the electric wires i and j regarded as a cylinder is Vij = (Vn, Vs) (where Vn is the velocity in the normal direction of the electric wire contact portion, and Vs is the electric wire. Speed in the direction along the contact portion), and the coefficient of friction between the wires i and j is μ, the repulsive force Pij is
Pij = kn | δij | (δij <0)
Pij = 0.0 (δij ≧ 0)
And the frictional force Sij is
Sij = −μPijVs / | Vs | (δij <0)
Sij = 0.0 (δij ≧ 0)
Is calculated by

Even if the cross section of the constraining structure does not reach the point where the electric wire comes into contact, the electric wires i and j may be in contact with each other due to bending due to the bending flaw (γ) generated in the electric wire. In such a case, the weak repulsive force fij due to the bending δij is further considered.
As shown in FIG. 9, if the electric wire i, j having a length La has a radius of curvature γ (>> uij) due to a bending rod, the distance uij between the electric wires i, j due to warping is uij≈La ² / (4γ ).

Assuming that both ends of the electric wires i and j having a length La are free, the load (repulsive force) fij due to their deflection δij is:
fij = (48EIij / La ³ ) uij (δij <0)
fij = (48EIij / La ³ ) (uij−δ) (0 ≦ δij ≦ uij)
fij = (48EIij / La ³ ) × 0.0 = 0 (δij> uij)
Is calculated by
However, E is the Young's modulus of the electric wires i and j, and EIij = EIi × EIj / (EIi + EIj) where Ii and Ij are the cross-sectional secondary moments of the electric wires i and j.

Next, CPU14 calculates the external force added to each electric wire of the restraint structure (S11) which changed micro distance (S17).
The external force that may be applied to the electric wire i includes the gravity that the electric wire i receives, the buoyancy that the electric wire i receives from the surrounding medium (air, water, etc.), and the bending from the position where the electric wire i is connected to the terminal of the connector 4 There is power to act by being.

The resultant force qi of gravity and buoyancy received by the electric wire i of length L is
qi = (ρi-ρ0) ( πLφi 2/4) g
Is calculated by Here, ρi is the density of the electric wire i (average density including the covering material), ρ0 is the density of the medium, φi is the diameter of the electric wire i, and g is the acceleration of gravity.

As shown in FIG. 10, the force qi acting by di-bending during the distance Lb from the position where the electric wire i is connected to the terminal of the connector 4 is
qi = 3EIidi / Lb ³
Is calculated by However, E is the Young's modulus of the electric wire i, Ii is the cross-sectional secondary moment of the electric wire i.
Moreover, the viscous force qi = -v * Ci (Ci is a viscosity coefficient) with respect to the displacement speed v of the electric wire i is given, and the vibration which inhibits the electric wire i from reaching a force balance state can also be suppressed.

Next, the CPU 14 integrates the load and the external force calculated in steps S13, S15, and S17 for each electric wire, and the acceleration for each electric wire i is calculated based on the integrated load integrated value Fi for each electric wire i and the mass Mi for each electric wire i. ai (t + 1) = Fi / Mi is calculated (S19).
However, Mi is the mass of the wire, for example, if the circular wire, the average density ρi, including dressings, outer diameter of the wire .phi.i, as the wire length L, is calculated by πρiLφi ^2/4.

Next, the CPU 14 regards the electric wire as a mass point, creates a motion equation for each wire, and calculates a velocity vector and a position vector for each wire from the acceleration using the created motion equation (S21).
As an example of the calculation method, an equation for calculating the equation of motion of electric wire = mass point by discretizing with a time component is shown below.
Velocity vector v (t + dt) = v (t) +0.5 (a (t) + a (t + dt)) × dt
Position vector x (t + dt) = x (t) + v (t) × dt + ((2/3) × a (t)
+ (1/3) × a (t + dt)) × dt 2/2

Next, the CPU 14 determines whether or not the position variation of each electric wire has converged based on the calculated velocity vector and position vector for each electric wire, the constraint structure, the load for each electric wire, and the load integrated value for each electric wire ( S23).
The time when the repulsive force generated in the constraining structure becomes a set value or when the constraining structure reaches the target arrangement and the position variation of each electric wire is sufficiently settled is defined as the convergence time.

When the constraining structure is a circular bundle, the tape internal pressure p = T / LR, where the tension (T) of the tape (constraining material), the tape width L, and the internal radius R of the constraining structure are satisfied. The integral value of 2πRL × p = 2πT is made to coincide with the restraining force F.
In this case, as the convergence conditions, it is assumed that the inner radius R is sufficiently stable, satisfies the relationship F≈2πT≈Σri, and has reached a predetermined bundle outer diameter. However, ri is the repulsive force from the tape which the electric wire i receives.

If the position variation of each electric wire has converged (S23), the CPU 14 outputs the electric wire arrangement (restraint structure) where the position fluctuation of each electric wire has converged and data related to the electric wire arrangement to the display unit 10 for display. (S25) The process is terminated.
If the position variation of each electric wire has not converged (S23), the CPU 14 adds the time step (minute time) dt (S27), and moves (reduces) the wall of the constraining structure toward the final shape to be obtained. (Enlargement) is defined, and a minute time dt and a minute distance change dR are given (S11). That is, the constraint structure at the time when the time step dt has elapsed is calculated and updated.

  The CPU 14 displays the preprocessed electric wire arrangement on the display unit 10 (S5), and if the operation input from the user instructs to end (S7), the CPU 14 relates to the preprocessed electric wire arrangement and the electric wire arrangement. The data to be output is output and displayed on the display unit 10 (S25), and the process is terminated.

As described above, when the initial wire arrangement of the wire bundle connected to the connector 4 shown in FIG. 11A is a square shape shown in FIG. 11B, the friction coefficient between the wires is 0.2 and the binding force is the tape tension 2N. The calculated and converged constraint structure could be predicted as shown in FIG. 11C.
Similarly, the converging structure which converged by calculating the friction coefficient between the wires as 0.5 and the constraining force as the tape tension of 2N could be predicted as shown in FIG. 11D. When the diameter of the constraining structure shown in FIG. 11C is 100%, the diameter of the constraining structure shown in FIG. 11D is 112%, which indicates that it is difficult to converge toward the center of the wire bundle when the frictional force between the wires is large. It can be convinced in terms of human sense.

(Embodiment 2)
FIG. 12 is an explanatory diagram schematically showing the configuration of the embodiment of the recording medium according to the present invention.
The recording medium is a CD (Compact Disc) 3 here, but the recording medium may be a DVD (Digital Versatile Disc) or other optical media. Further, the recording medium may be a semiconductor memory such as a random access memory (RAM), a read only memory (ROM), or a flash memory. As the flash memory, a removable memory such as a memory card or a USB (Universal Serial Bus) memory can be used.

For CD3, calculation was performed based on the weighting coefficient for each radius of each insulated wire, the procedure T1 for determining the initial arrangement based on the position of each terminal of the insulated wire connector connected to the computer and the radius of each of the insulated wires. Based on the center, a program for executing the procedure T3 for mapping and converting the initial arrangement into an arrangement having a shape determined by the constraint material is recorded.
In CD3, the procedure T5 for calculating the contact arrangement in which the insulated wires come into contact with each other on the basis of the arrangement of the map-transformed shape on the computer, when the bundle of the calculated contact arrangement is bundled with a restraining material. A program for executing a procedure T7 for calculating a constraint arrangement that changes in series and a procedure T9 for calculating a force acting on each insulated wire in the calculated constraint arrangement is recorded.

  In CD3, a procedure T11 for calculating acceleration acting on each insulated wire based on each calculated acting force on the computer, and an equation of motion with the center point of each insulated wire as a mass point by each calculated acceleration, respectively. A program for executing the procedure T13 for calculating the speed and position vector of each insulated wire by the generated equation of motion is recorded.

Further, in CD3, the procedure T15 for determining whether or not the position variation of each insulated wire has converged based on the calculated speeds and position vectors, the constraint arrangement and the acting forces is not converged on the computer. Are recorded, a program for executing the procedure T17 for calculating the constrained arrangement after the time step dt and the procedure T19 for outputting the predicted arrangement is recorded.
The computer that has read the program recorded on the CD 3 operates as described in the first embodiment.

2 Computer 3 CD (Recording medium)
4 Connector 6 Electric wire (insulated wire)
7 Constraint Material 8 Keyboard 9 Mouse 10 Display Unit 12 Drive 14 CPU
18 GPU

Claims (9)

A plurality of insulated wires to be connected to the connector has a circular cross-section, the arrangement of the insulated wire in the case of making a wire bundle by bundling the restraining member, the conductor arrangement prediction method Ru is predicted in the computer,
A step of determining an initial arrangement based on a position of each of the plurality of insulated wires connected to each terminal of the connector and each radius of the plurality of insulated wires, and a center of the determined initial arrangement; Each of the insulated wires is calculated based on a step of calculating based on a weighting factor determined in advance by a radius, a step of mapping and converting the initial layout to a layout of a shape determined by the constraint material based on the calculated center, A step of calculating a contact arrangement in contact with each other; a step of calculating a constraint arrangement that changes in time series when the bundle of electric wires of the calculated contact arrangement is bundled by the constraint material with an arbitrary constraint force; Calculating the force acting on each insulated wire, calculating the acceleration acting on each insulated wire based on the calculated acting force, calculating Each of the accelerations creates a motion equation with the center point of each insulated wire as a mass point, calculates the speed and position vector of each insulated wire using the created motion equation, each calculated velocity and each position vector, and Based on the restraint arrangement and each acting force, a step of determining whether or not the position fluctuation of each insulated wire has converged is executed. If not, the restraint arrangement when a minute time has elapsed is calculated. conductor arrangement prediction method comprising Rukoto is iteration steps.   The force acting on each insulated wire in the restraint arrangement includes a repulsive force from the restraint material of the restraint arrangement to each insulated wire, a contact load between each insulated wire, and a friction load between each insulated wire. The electric wire arrangement | positioning prediction method of 1 description. The step of calculating the contact arrangement is a step of causing the computer to move each insulated wire to the center by a predetermined distance, and when the insulated wires moved by a predetermined distance interfere with each other, before either of them is moved by the predetermined distance the step of causing return to the position movement, the moved until it contacts one of the other of the center point direction, the distance amount the distance of moving subtracted from the predetermined distance, the direction toward the center of the initial placement of both the tangential step of, when the insulated wire is further interferes, step giving back the one to the position, the predetermined distance comprises a step of Ru is set to a shorter distance, to the center of the insulated wires at a short distance is set claim 1 or 2 conductor arrangement prediction method according step of moving the Ru to iteration. The electric wire arrangement prediction according to any one of claims 1 to 3, further causing a computer to execute a step of displaying the calculated contact arrangement on a display screen and a step of accepting an instruction to make the displayed contact arrangement an estimated arrangement. Method.   The force acting on each insulated wire in the restraint arrangement includes gravity received by each insulated wire, buoyancy received by each insulated wire from the surrounding medium, and bending from a position where each insulated wire is connected to the terminal of the connector. The electric wire arrangement | positioning prediction method as described in any one of Claims 1 thru | or 4 including the force which acts by being performed.   The wire arrangement according to any one of claims 1 to 5, wherein the force acting on each insulated wire in the constrained arrangement includes a contact load between the insulated wires caused by a bending wrinkle of each insulated wire. Prediction method. In the electric wire arrangement prediction device for predicting the arrangement of the insulated electric wires in the case where a plurality of insulated electric wires having a circular cross section and connected to the connector are bundled with a binding material to make an electric wire bundle,
The position of each of the plurality of insulated wires connected to each terminal of the connector and the means for determining the initial arrangement based on the radii of the plurality of insulated wires, and the center of the initial arrangement determined by the means, A means for calculating based on a weighting factor determined in advance by each radius; a means for mapping the initial arrangement to an arrangement of a shape determined by the restraining material based on a center calculated by the means; and a shape mapped by the means Based on the arrangement, the means for calculating the contact arrangement in which the insulated wires contact each other, and the wire arrangement of the contact arrangement calculated by the means are changed in time series when the binding material is bundled with an arbitrary restraining force. Means for calculating the restraint arrangement, means for calculating the force acting on each insulated wire in the restraint arrangement calculated by the means, and acceleration acting on each insulated wire based on each acting force computed by the means. Calculation A means for calculating a motion equation with the center point of each insulated wire as a mass point by each acceleration calculated by the means, and calculating a velocity and a position vector of each insulated wire by the created motion equation, Means for determining whether or not the position variation of each insulated wire has converged based on each speed and each position vector calculated by the means, and the constraint arrangement and each acting force, and the means has not converged When it is determined, the electric wire arrangement predicting apparatus is configured to return to the means for calculating the constrained arrangement when a minute time has elapsed and to repeat. In a program for causing a computer to execute a procedure for predicting the arrangement of the insulated wires when a plurality of insulated wires having a circular cross section and connected to a connector are bundled with a binding material to form a bundle of wires,
In the computer, the procedure for determining the initial arrangement based on the respective positions of the connectors of the plurality of insulated wires and the respective radii of the plurality of insulated wires, the center of the determined initial arrangement for each of the insulated wires Each insulated wire is based on a procedure for calculating based on a weighting factor determined in advance by a radius, a procedure for mapping the initial layout to a layout of a shape determined by the constraint material based on the calculated center, and a layout of the shape after the mapping conversion. Procedures for calculating contact arrangements that come into contact with each other, procedures for calculating a constraint arrangement that changes in a time series when the bundle of electric wires of the calculated contact arrangements is bundled with an arbitrary restriction force with the restriction material, and within the calculated restriction arrangement The procedure for calculating the force acting on each insulated wire, the procedure for calculating the acceleration acting on each insulated wire based on the calculated force, Create equations of motion with the center point as the mass point, calculate the speed and position vector of each insulated wire based on the created equations of motion, calculate each speed and each position vector, and based on the constraint arrangement and each acting force , A procedure for determining whether or not the position variation of each insulated wire has converged, and when it is determined that it has not converged, a procedure for repeatedly executing from the procedure for calculating the restraint arrangement at the time when a minute time has elapsed is executed. Program.   A computer-readable recording medium on which the program according to claim 8 is recorded.

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