WO2013103114A1 - System for designing long resin member - Google Patents

Abstract

One embodiment of a system for designing a long resin member that deforms under an external load, wherein are provided: a setting unit for setting design information required for design of the long resin member on the basis of information input by an operator; a calculation unit for calculating, on the basis of the set design information, physical factors when the long resin member is in a state of deformation due to an external load; and an assessment unit for assessing whether the design information is good or bad on the basis of the results of the calculation of the physical factors by the calculation unit. The physical factors include strain energy.

Description

Resin long material design system

The present invention relates to a design system for designing a tubular member or a plate-like long member made of resin by using a numerical sensibility evaluation by a physical element.
This application claims priority based on Japanese Patent Application 2012-1608 (filed on January 6, 2012) and Japanese Patent Application 2012-33798 (filed on February 20, 2012), the contents of which are hereby incorporated by reference Incorporated herein in its entirety.

In recent years, tubular or plate-like long members such as fishing rods and golf shafts have been produced using resin materials containing reinforcing fibers such as carbon. Therefore, not only the length and the outer diameter, but also a long member having various characteristics can be designed. In the design, for example, the ratio of the carbon reinforcing fiber in the resin material, the winding direction of the carbon reinforcing fiber, and the like are appropriately combined to determine specific characteristics such as bending rigidity and torsional rigidity. For example, a fishing rod includes various elements such as a hanging curve, which is the degree of bending of the rod, rigidity of the rod, and transmission of vibration caused by a fish pull generated at the tip of the rod.

Normally, when producing a long resin member with new features, the specifications are determined based on previous production materials and experience. For example, a prototype is produced by designing a resin material or structure that can obtain a desired bending rigidity. This prototype is actually used by a professional inspector to obtain a sensory evaluation result, and the final product specification is determined by adjusting the evaluation result through trial and error.

JP 2005-218341 A

Conventionally, in designing a long member, for example, a fishing rod, it is possible to assume a certain level of characteristics by using past evaluation results accumulated from past manufacturing experience. For example, when the load is applied to the tip of the heel, it is designed to combine the known values such as the direction of the carbon reinforcing fiber, the amount of resin, and the wall thickness for the bending curve, that is, the rigidity. This assumes a hanging curve. Moreover, visual confirmation is also possible by suspending a weight from the tip of the prototype produced by the design.

However, performance measurements obtained at the manufacturing site, such as hanging weights, do not always match the results obtained when fish are caught in actual fishing. Changes have been made. In other words, in a plurality of prototype fishing rods, even if the weights of the same weight are hung on the tip of the fishing rod, even if it is a hanging curve of substantially the same shape to the appearance, the result of the sensibility evaluation by the inspector, for example, operability In some cases, it was judged that one was good but the other was insufficient. This is probably because the current design technology does not quantify the sensibility evaluation of the fishing rod operability and the tame, so that it is difficult to set these specifications at the design stage.

For this reason, if there is no difference in the stiffness and multiplication curve used in the existing design technology, despite the good / bad evaluation in the obtained Kansei evaluation, It is a design change on a case-by-case basis due to repeated confirmation by actual fishing, and the time and cost for making a large number of prototypes and trial production costs increase, and it takes time to finish the product.

Therefore, the present invention captures the sensibility evaluation related to a tubular or plate-like long member formed of a resin material as a quantified physical element, and the tubular or plate-like length of a desired specification from the physical element. It aims at providing the design system of the resin long member which designs a long member.

A resin long member design system according to an embodiment of the present invention is a resin long member design system that deforms due to an external load, and is based on input information from an operator. A setting unit that sets design information necessary for design, a calculation unit that calculates a physical element in a state where the resin long member based on the set design information is deformed by the external load, and the calculation unit A determination unit that determines the quality of the design information based on the calculation result of the physical element.

According to various embodiments of the present invention, sensibility evaluation related to a tubular or plate-like long member formed of a resin material is regarded as a numerical physical element, and a desired specification is determined from the physical element. It is possible to provide a resin long tubular member design system for designing a tubular or plate-like long member.

FIG. 1 is a diagram showing a conceptual configuration of a resin tubular member design system according to a first embodiment of the present invention. FIG. 2 is a diagram conceptually illustrating a process of manufacturing a fishing rod. FIG. 3 is a diagram for explaining a hanging curve when the fishing rod is lifted. FIG. 4 is a diagram illustrating a first example of strain energy characteristics in a fishing rod. FIG. 5 is a diagram showing a second example of strain energy characteristics in a fishing rod. FIG. 6 is a diagram illustrating a third example of strain energy characteristics in a fishing rod. FIG. 7 is a diagram showing the bending rigidity characteristics of a fishing rod according to a conventional design technique. FIG. 8 is a diagram showing characteristics of a fishing rod hanging curve according to a conventional design technique. FIG. 9 is a diagram showing a conceptual configuration of a resin tubular member design system in the second embodiment. FIG. 10 is a diagram illustrating an example of a strain sensor disposed on a fishing rod. It is a figure which shows notionally the process of manufacturing the fishing rod in 2nd and 3rd embodiment. FIG. 12 is a diagram illustrating a conceptual configuration of a resin tubular member design system according to the third embodiment. FIG. 13 is a diagram illustrating an example of a captured image.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. The concept of the resin tubular member design system according to the embodiment of the present invention will be described. In the following description, a fishing rod design system using a fishing rod as an example of a tubular or plate-like long member made of a resin material will be described in detail.

In general, a fishing rod made of a fiber reinforced resin material impregnated with a resin determines the desired length, outer diameter, etc., and sets physical quantities such as weight and rigidity (bending rigidity, torsional rigidity) and their distribution. The material is selected according to the specifications. The sensibility evaluation referred to in the present embodiment mainly refers to operability (such as a sling operation, a pulling operation, and a pulling operation) that occurs along with the operation of the fishing rod when the angler actually fishes and is judged sensuously. And Here, the term “tame” refers to a rigidity balance over the entire rod so that the rod can be manually operated (raising and lowering the rod and pulling the rod tip) when a large load (fish) is applied to the rod and bends. Note that a state in which the fishing rod cannot be led to the load is referred to as a rod being loaded.

The fishing rod design system selects the physical elements related to the fishing rod so that it meets the specifications (desired dimensions (length and outer diameter), tone, bending condition, sensitivity, etc.) in designing and prototyping the fishing rod. Set.

The physical elements related to fishing rods are explained. Specific examples of these known physical elements to be set include the following elements.
[Length] The length of the fishing rod. It is set as appropriate depending on the target fish and the field to be used. For example, if the target fish is carp fishing in a river, the length is about 8 to 10 m, and if the target fish is kiss fishing on a fishing boat, the length is about 2 m.
[Outer diameter] The outer diameter of the kite is largely determined by the strength of the material, that is, the selection of the fiber-reinforced resin material impregnated with the resin. The outer diameter depends on the target fish or the load applied by the device as well as the length of the kite. The diameter is set. In the case of a tubular structure (hollow shape), the thickness and the inner diameter are also included. It should be noted that the outer diameter of the eyelid can be inferred from the number of pixels in the photographed image.

[Weight] The weight is mainly based on the amount of the fiber reinforced resin material used. In the case of a fishing rod using a reel, a reel seat and a fishing line guide are included.
[Number of joints] This is the number of separated short baskets (pieces or guards) when a separation structure is adopted for carrying. A fishing rod without a joint is called a total rod or a one-piece rod. Note that the same number of joints are handled in both the case of parallel spears and the swing spears, but the strength is different because there are a plurality of different splice structures.

[Curvature] The curvature is a value indicating the degree of curvature of the curve (curved surface) at each point on the curve (curved surface), and is represented by the reciprocal of the radius of curvature ρ. The greater the curvature, the greater the curvature. It is also possible to calculate the curvature using the captured image. For example, the curvature at a plurality of positions of interest set on a curved curve of a fishing rod can be calculated using the pixel position of the image sensor as position information. Or, for a continuous image taken with a load applied to a fishing rod (an image before the load and an image after the load), set an attention pattern region composed of pixels of the attention position and surrounding pixels, By using a known image correlation method, distortion can be detected based on a change in the pattern area of interest between images, and the curvature can be calculated using this distortion. The curvature is indicated by 1 / ρ, and 1 / ρ = M / EI. M: moment, EI: rigidity of the object.

[Hanging curve] It is a bent shape when a load is applied to the tip of the fishing rod. The bend shape varies depending on the presence or absence of a guide.
[Resin Material] A known resin material, which is appropriately selected based on the presence / absence of fibers and resin and the design specifications of the material.

[Fiber direction] An arrangement direction (fiber direction) of a plurality of reinforcing fibers such as carbon in the fiber reinforced resin material. Here, the longitudinal direction of the ridge is defined as the vertical direction (0 degree), and the direction orthogonal thereto is defined as the horizontal direction (90 degrees). The rigidity changes depending on the angle in the fiber direction.

[Laminated structure] A layer of fiber reinforced resin material impregnated with resin. A plurality of sheet-like resin material layers are overlapped and formed to taper in a columnar or cylindrical shape. There are two types of fishing rod structures: a cylindrical tubular structure with a space inside, and a solid structure with no space inside. Rigidity varies depending on the stacking order of fiber reinforced resin materials having different elastic reinforcing fibers. In the present specification, the internal structure includes a laminated structure including the fiber direction of the sheet member and the number of laminated sheets.

[Resin Amount] The amount of resin (resin) that functions as an adhesive between reinforcing fibers (carbon, glass, etc.) in the fiber reinforced resin material forming the fishing rod. By reducing the amount of resin in a predetermined cross-sectional area and increasing the density of carbon fibers (the number of fibers per unit volume), the weight can be reduced. Usually, the fiber reinforced resin material is formed as a thin sheet member. In the present specification, the resin of the sheet member is included in the resin material.

[Rigidity (elastic modulus)] The rigidity of the fishing rod is difficult to be deformed due to bending or twisting. Among these, the bending rigidity greatly affects the bending state when a load is applied to the fishing rod, that is, the hanging curve. The torsional rigidity differs depending on the fiber direction of the reinforcing fiber in the fiber-reinforced resin material. The case where the fiber direction is the longitudinal direction (0 degrees) and the lateral direction (90 degrees) of the ridge is the weakest, and the oblique direction may be 45 degrees. The biggest. In the case where the torsional rigidity is weak, for example, if a load is applied to a plurality of guides provided on the fishing rod in the direction of rotation about the longitudinal direction of the rod, the guide is inclined in the rotation direction and the operability of the rod is deteriorated. For example, a fishing rod having a specification for casting a lure affects the accuracy of the casting direction and the landing position.

These are known main parameters that are set during fishing rod design. These physical elements have a mutually influencing relationship, and changing one physical element affects other physical elements. Accordingly, when a design for improving one physical element is performed, other physical elements may be adversely affected, and therefore, it is necessary to achieve a harmony among a plurality of physical elements.

In the embodiment of the present invention, attention is paid to energy acting on a fishing rod as one of physical elements related to moment and rigidity. Normally, as shown in FIG. 3, when an external force (for example, a load due to fishing fish) acts on the tip of a fishing rod, the entire rod is bent. Specifically, when the angle of the heel with respect to the horizontal plane is held as an angle θ1 with the heel as the fulcrum and the position where the angler's hand grips the support position as the angle θ1, Load direction acts in the direction indicated by, and a multiplying curve is generated.

When a load is applied to the tip of the fishing rod, energy is generated in the entire fishing rod by deforming it from the tip of the rod to the bottom of the rod, and is stored until the load is released. This energy is referred to as [strain energy] as a quantified physical element for performing kansei evaluation.

[Strain energy] will be described. Usually, if the strain with respect to the applied force is the same shape, the component part made of a hard material has a small strain, and the component part made of a soft material has a large strain. As described above, when strain occurs, a force is generated to return to the original shape. The strain energy in a fishing rod is the energy that the bent rod tries to return to its original straight state and is an important physical element of the design.

In an embodiment described below, a plurality of specific positions are determined from arbitrary positions on a fishing rod, strain energy at the specific positions is calculated, and used as a numerical value (energy distribution) for comparison for performing pass / fail judgment described later. . The strain energy can be obtained from the acting moment and stiffness (bending stiffness), and is given by the following well-known formula (1).

However, M = EI / ρ, M: moment, EI: object rigidity, 1 / ρ: curvature.

When strain energy is used for fishing rod design, the strain energy at each of a plurality of specific positions determined from the tip of the rod to the butt is calculated. The calculated result is not only managed as a numerical table, but is also graphed and used as a distribution characteristic for determination, as will be described later. The strain energy can be calculated by simulation using the above-described arithmetic expression. Alternatively, it is also possible to place a known strain sensor at a specific position of an actual fishing rod, perform an actual measurement, and check a calculation result by simulation.

Next, the design simulation of a fishing rod will be described using a specific curve as an example. FIG. 7 shows the characteristics of the bending rigidity of a fishing rod according to a conventional design technique, which is calculated using the diameter of the rod at each position of the rod and the elastic modulus of the fiber reinforced resin material. FIG. 8 shows a fishing rod hanging curve according to a conventional design technique. In this example, a long fishing rod having a seam for fishing a rod or the like will be described as an example.

FIG. 8 shows, for example, the multiplication curves of the fishing rods S1 and S2 when the same load is applied to the fishing rod tips of two fishing rods S1 and S2 having the same length, diameter, tone and weight load of the target fish. ing. Note that the plurality of steps on the bending rigidity characteristic curve shown in FIG. 7 indicate steep changes that occur in the joint portion of the fishing rod having higher rigidity. On the other hand, in a seamless fishing rod such as a one-piece rod, the change is smooth without steps.

These bending rigidity and hanging curves become two characteristic curves which are shifted if the characteristics of the fishing rod are different, but here are substantially coincident and overlapping curves. In other words, it has the same characteristics in appearance. Therefore, from this evaluation result, these fishing rods are determined as fishing rods having the same characteristics.

However, when actual fishing was performed, in the sensuous evaluation by a professional inspector, one of the evaluation results showed that the overall balance of the load applied while moving from the tip of the fishing rod to the bottom of the rod was poor. This point cannot be evaluated as a numerical value in the conventional simulation. *

Therefore, in the embodiment of the present invention, the simulation is performed by paying attention to the strain energy acting on the fishing rod when an external force is applied. FIG. 4 shows a distribution (energy characteristic) of strain energy stored in the fishing rods S1 and S2 in a state where a light load (for example, a load caused by a device and a decoy rod) is applied to the rod tip under actual fishing, obtained by simulation. FIG. This figure shows the strain energy distribution in a predetermined range from the heel to the buttock side. The light load means a load on the light side within the weight load allowable range of the fishing rod. For example, a state where the device is submerged in water is assumed. In the following description, the medium load means a medium load within the allowable weight load range. For example, a load applied when a fish is applied is assumed. Similarly, a heavy load means a load on the heavy side within the weight load allowable range. For example, a load applied when a fish is caught (or when a fishing line is wound up) or when a fish is pulled up is used. is assumed.

As shown in FIG. 3, a plurality of specific positions on the fishing rod are assumed on the assumption that the rod tip of the fishing rod is lifted and the angle of the rod with respect to the horizontal plane is maintained at an arbitrary angle θ1 (for example, 45 °). Is calculated using the above-described equation (1) and plotted. Here, in FIG. 4, when the plots are not arranged in a curved line, they are described as approximate curves. Here, as a result of the sensibility evaluation by the inspector, the fishing rod S1 has good operability, but the fishing rod S2 is determined to be defective.

Comparing the strain energy characteristics obtained by the simulation of these fishing rods S1 and S2, both of them are located at a specific position m where the distance of less than 10% of the rod length in the range shown in FIG. The highest peak of strain energy is seen. The change in the strain energy characteristic of the fishing rod S1 is U-shaped with a smooth curve from the specific position m of the peak toward the bottom of the rod. On the other hand, in the fishing rod S2, a peak is seen at the same specific position m as the fishing rod S1, and the peak value is larger than that of the fishing rod S1. A U-shape having a plurality of steps is formed from a specific position m of the peak toward the buttock.

As described above, in the sensitivity evaluation by the inspector, the fishing rod S1 is determined to be good and the fishing rod S2 is determined to be poor, and the change in the strain energy characteristic of the fishing rod S2 is a fluctuation range from the tip of the fishing rod compared to the fishing rod S1. Is a large and steep change, has a step-like change, and has a characteristic curve that is not a smooth transition. In other words, when looking at the fishing rod as a whole, the strain energy is concentrated at a specific position, and the energy change at the tip of the tip is not transmitted smoothly in the direction of the tip of the tip. It can be considered that it has not been communicated. That is, the fishing rod S2 has a sensibility evaluation that it is difficult to operate the decoy rod because, for example, a change in the pull (fish trust) from the decoy rod cannot be transmitted well to the angler.

FIG. 5 shows the distribution of strain energy stored in the above-described fishing rods S1 and S2 when a moderate load (for example, a load when a fish is applied) is applied to the rod tip under actual fishing obtained by simulation. It is a figure which shows an energy characteristic.

When comparing the energy characteristics of these fishing rods S1 and S2, the highest peak of strain energy is set at the same specific position m as shown in FIG. 4 (when a light load is applied to the tip of the rod). In the fishing rod S1, the change in the strain energy characteristics decreases from a specific position m of the peak toward the buttock side and decreases with a smooth curve. In the fishing rod S2, a peak value higher than that of the fishing rod S1 is seen at the same specific position m as the fishing rod S1. From the specific position m of the peak toward the heel side, the peak sharply decreases with a reduction range larger than the reduction range in the energy characteristics of the fishing rod S1.

The change in the strain energy characteristics of the fishing rod S2 is a sharp change with a large fluctuation range from the tip of the fishing rod, with the strain energy concentrated more at a specific position m than the fishing rod S1. In other words, the fish faith (load fluctuation) when the fish produced at the tip of the fish hooked is accumulated at a certain specific position (specific position m), reducing the size of the fish faith, and the accumulated time, Transmission of energy change from the tip to the buttock side is delayed. Therefore, the angler feels a delay in the transmission of the fish belief that the fish has been caught, and the result is not satisfactory as a sensitivity evaluation.

FIG. 6 shows the strain accumulated in the above-described fishing rods S1 and S2 when a large load is applied to the rod tip under actual fishing obtained by simulation (for example, when a hung fish is attracted or pulled). It is a figure which shows distribution (energy characteristic) of energy. Comparing the energy characteristics of these fishing rods S1 and S2, both peaks having the highest strain energy at a specific position moved from the tip side to the buttock side by a distance of about 1/4 of the rod length in the range shown in FIG. Is seen.

The change in the strain energy characteristics of the fishing rod S1 is a smooth and gently decreasing shape from the peak specific position n toward the buttock side. In the fishing rod S2, a peak value higher than that of the fishing rod S1 is seen at a specific position p closer to the rod tail side than the fishing rod S1. From the specific position p, which is the peak, toward the bottom of the rod, it decreases with a decrease larger than the decrease in the characteristic curve of the fishing rod S1 and crosses the characteristic curve of the fishing rod S1, and then has an energy value lower than that of the fishing rod S1. Become.

The change in the strain energy characteristics of the fishing rod S2 is greatly changed from the strain energy peak to the buttock side compared to the fishing rod S1. That is, when viewed from the whole fishing rod, the rigidity in the vicinity of the specific position p where the strain energy is large (near the center of the buttocks side) is small, and the rigidity is large when hung on the rod tail side where the strain energy is low. Therefore, the fishing rod S2 has a characteristic that it is hard from the hand to the vicinity of the specific position p (near the center of the buttock side), and the tip side is bent more than that, and the angler has no operability. You will receive a sensitivity evaluation.

The strain energy distribution related to the fishing rod S1 with good sensibility evaluation is stored as a reference for comparison, and used as a reference for comparison when a new fishing rod is designed. Thereafter, the strain energy distribution determined as good is stored each time. Further, an ideal strain energy distribution model may be constructed by using the previously stored strain energy distribution for correction. Further, the strain energy distribution determined to be defective may also be stored and used as a basis for the cause in the failure analysis.

FIG. 1 is a diagram showing a conceptual configuration of a fishing rod design system according to the first embodiment of the present invention. The fishing rod design system 1 of this embodiment includes a physical element calculation unit (design unit) 2 that obtains the physical elements described above, an input unit 3, a display unit 4, and a plurality of external terminals 5.

The physical element calculation unit 2 is a control unit (processing unit: CPU) 7 that controls calculation processing and communication processing related to the physical elements described above, and selection and physical selection of resin materials or components to be used according to instructions from the input unit 3. A setting condition setting unit 6 for setting a target element, and parameters for selecting and setting the setting condition setting unit 6 (for example, eigenvalues of physical elements defined in a resin material or a part to be used) A parameter data unit 10, a physical element calculated by the control unit 7, for example, a determination unit 8 that performs pass / fail determination on strain energy and strain energy distribution (simulation value), and fishing rod data designed in the past It is composed of a data unit 9 for storing the evaluation results of actual fishing in association with each other and an I / O port 11 that functions as a communication interface with the external terminal 5. .

In this embodiment, the parameter data unit 10 and the data unit 9 are configured separately, but may be integrated.

The display unit 4 is a known display device that displays information using a liquid crystal display device or the like. The external terminal 5 is a personal computer or the like used by a designer connected to the I / O port 11 of the physical element calculation unit 2 via a network such as a LAN. The input unit 3 includes a keyboard and a touch panel provided on the screen surface of the display unit 4. The input unit 3 includes an input device such as a keyboard provided in the external terminal 5.

The setting condition setting unit 6 causes the display unit 4 to display a setting screen necessary for selecting materials and parts to be used and setting physical elements, and sets setting items as design specifications based on instructions from the input unit 3 To do. The setting items are used for calculation (simulation) in the control unit 7, for example, the length of the ridge, the outer diameter, the guide position, the eigenvalues of the physical elements of the parts and resin materials used, the fiber direction, the wall thickness, and the laminated structure And the elastic modulus of the resin material.

The control unit 7 calculates, for example, strain energy and strain energy distribution among physical elements by using a preset processing program for executing processing including the arithmetic processing of the above-described equation (1). I do. The control unit 7 uses other arithmetic expressions to calculate physical elements such as bending rigidity, torsional rigidity, strength, tone, curvature, weight, resin amount, curve with or without guide, weight distribution, moment of inertia, and mating structure. It is also possible to calculate. The setting condition setting unit 6 and the control unit 7 function as a calculation unit in an embodiment of the present invention.

The control unit 7 calculates strain energy at a plurality of specific positions of the fishing rod, for example, and graphs the distribution of calculated values at each specific position of the fishing rod as shown in FIGS. In addition, when accessed by each external terminal 5, the control unit 7 performs arithmetic processing in accordance with an input instruction from the external terminal 5. In the fishing rod design system 1, the control unit 7 provides information such as various data to each external terminal in accordance with a request from each external terminal 5, performs calculation processing in each external terminal 5, and executes a simulation. Also good.

The determination unit 8 compares the energy characteristics including, for example, strain energy and strain energy distribution among the physical elements calculated by the control unit 7 with the past data previously recorded in the data unit 9, Pass / fail judgment is performed. For example, good / bad determination is performed by comparing the calculated strain energy distribution with a strain energy distribution that is a predetermined determination criterion from past data with good sensitivity evaluation. Alternatively, for example, a strain energy distribution that matches or approximates the calculated strain energy distribution is searched from past data recorded in the data unit 9, and evaluation of the sensibility evaluation associated with the searched strain energy distribution is performed. Based on the result, good / bad is judged.

Compared with the strain energy distribution that is a preset criterion, when determining good / bad, it is determined that the discrepancy with the strain energy distribution that is the criterion is within a predetermined determination range. Determined. The determination range that is determined to be good is set in advance based on data of fishing rods that have been used in the past (manufactured fishing rods or fishing rods that have good sensitivity evaluation results). If the discrepancy with the strain energy distribution, which is the criterion, is out of the judgment range and is not determined to be good, the disagreement point with the strain energy distribution of the criterion (defect location in the strain energy distribution) is displayed in color, etc. The location of the fishing rod to be corrected may be notified.

FIG. 2 is a diagram conceptually showing a process of designing and manufacturing a fishing rod. In the process of designing and manufacturing a fishing rod in the present embodiment, an input setting by each designer is performed in consideration of a design specification process for determining the concept of the fishing rod by a meeting or the like, a design specification, and a feedback sentimental evaluation result. Create a fishing rod prototype based on the input settings in the design process, physical element calculation process for calculating physical elements such as strain energy and strain energy distribution based on the input setting information There are a trial production process, an actual fishing inspection process by an inspector, a sensitivity evaluation process for obtaining an evaluation from an inspector who performed actual fishing, and a product manufacturing process according to the determined specifications.

Each process will be described below. First of all, in the design specification process of fishing rods, a new fishing rod concept is proposed, including market research. Next, in the design process, the input unit 3 inputs detailed design items of the fishing rod that realizes the proposed concept to the setting condition setting unit 6 of the fishing rod design system 1 of the embodiment. This design item can be set by selection input or direct input from the data stored in the parameter data section 10 on the setting screen displayed on the display section 4, for example, as described above, Length, outer diameter, number of joints, number of guides and arrangement position, weight, type of resin material, carbon fiber direction, and the like are included.

In the physical element calculation process, the physical element calculation unit 2 of the fishing rod design system 1 according to the embodiment calculates the moment, the bending rigidity, and the like based on the design items input and set in the design process. The strain energy is calculated using 1), and a strain energy distribution is created. Furthermore, in the determination unit 8 of the fishing rod design system 1 according to the embodiment, the strain energy and strain energy distribution calculated by the physical element calculation unit 2 are already recorded in the data unit 9 in the past. Is used as a determination criterion to determine whether or not it is satisfactory. This determination is performed by the method described above.

In this determination, if it is determined to be good, the process proceeds to the prototype process. On the other hand, if it is not determined to be good, the design process is returned to the design process. For example, as shown in FIG. 4 to FIG. 6 described above, when a local difference, an energy distribution difference, or a steep change occurs with respect to the determination criterion, the design process is returned to the design process. When the design is changed, the rigidity balance is mainly adjusted. This is based on strain energy being affected by stiffness balance.

This stiffness balance is, for example, the material, thickness, carbon fiber direction, number of resin sheets (number of carbon layers), combinations of resin sheets having different elastic moduli (layer order), and the outer diameter of a fishing rod, etc. It is possible to adjust by changing. Next, in the prototype process, a fishing rod that is a prototype is produced based on the input settings in the design process.

Next, in the actual fishing inspection process, an actual inspecting inspection is performed by a specialized inspector, and a sensibility evaluation regarding operability and the like is performed. In the sensitivity evaluation process, the performance test and sensitivity evaluation results of the fishing rod are examined to determine whether or not a design change is necessary. The determination result is a setting provided in the data unit 9 in association with the setting item set by the setting condition setting unit 6 of the fishing rod design system 1 of the embodiment and the strain energy and strain energy distribution calculated by the control unit 7. Register in the table. In the sensitivity evaluation process, if the prototype is judged to be good, it is determined as the product specification and the process proceeds to product manufacturing. On the other hand, when the sensibility evaluation result is insufficient, referring to the sensual evaluation result fed back in the design process, for example, distortion among physical elements in the physical element calculation process described above. Reset the setting items considering the energy and strain energy distribution, and make a prototype fishing rod again.

In the embodiment described above, a fishing rod design system has been described using a fishing rod as an example of the resin tubular member. However, the present invention is not limited to this, and the resin tubular member that can be designed by this design system is at least a fishing rod. , Golf or badminton shafts, pole vaulting poles, bow and arrow shafts, etc. In addition, as resin plate-like members, ice hockey shafts, plate fishing rods used for smelting fishing rods, etc., single layer or laminated structure It can be easily applied to the design of a leaf spring or the like.

According to the resin long member design system of the present embodiment described above, by taking the physical element obtained by the moment and the bending stiffness acting on the fishing rod as the design items of the fishing rod, Sensitivity evaluation can be digitized or graphed (patterned), and the evaluation of the fishing rod can be derived from the evaluation of the fishing rod that has been prepared before, without producing a large number of prototypes.

Since the quantified physical elements obtained from the moment and bending stiffness are quantified as strain energy and strain energy distribution, the reproducibility is good, and the measurement data that supports the evaluation results is obtained by using a strain sensor. Is also possible. In particular, it is possible to obtain the characteristics of a fishing rod hanging curve according to actual fishing by using strain energy and strain energy distribution.

Furthermore, it is possible to reduce the manufacturing cost and shorten the product production period by reducing the number of prototypes produced. In addition, by storing the design items used for designing the prototype and the sensitivity evaluation results associated with physical elements including strain energy and strain energy distribution as sharable data, other designers can Can also help in the design of new products. Therefore, shortening can be realized even in the design period.

FIG. 9 is a diagram showing a conceptual configuration of a fishing rod design system according to the second embodiment. In this embodiment, the same components as those in the first embodiment described above are denoted by the same reference numerals, and detailed description thereof is omitted. As shown in FIG. 10, the fishing rod design system 1 according to the present embodiment attaches a plurality of strain sensors 13 to a fishing rod 12 at a plurality of specific positions, and then actually lowers the load 14 toward the tip of the fishing rod 12 to curve the fishing rod 12. The strain energy is detected and strain energy is calculated. In FIG. 10, the strain sensors are arranged substantially evenly, but depending on the tone of the heel, the arrangement distance is narrowly arranged on the tip side and densely arranged, and the arrangement interval on the heel side is widened and arranged roughly. The arrangement can be changed as appropriate so that the strain sensor signal can be detected in detail from a point to be noted.

This embodiment shown in FIG. 9 includes a physical element calculation unit (design unit) 2, an input unit 3, a display unit 4, a plurality of external terminals 5, and a plurality of strain sensors 13 (S1 to S13). Composed. The physical element calculation unit 2 includes a sensor signal processing unit 15 that calculates strain energy from strain sensor signals (strain values: ε) from the strain sensors S1 to S13, the selection of the above-described resin material or component, and physical elements. A setting condition setting unit 6 for setting the above, a control unit 7 for storing the calculated strain energy in a setting table provided in advance, and calculating a strain energy distribution and the like according to a preset processing program (calculation formula, etc.) , An input unit 3, a determination unit 8 that performs pass / fail determination on the result of strain energy and strain energy distribution (actual measurement value), a data unit 9, and an I / O port 11.

The strain sensor 13 uses a known metal strain gauge to detect a strain sensor signal consisting of a change in electric resistance value using a bridge circuit as the actual strain amount of the fishing rod. In addition, as the sensor, a piezoresistive element, a strain gauge using a piezoelectric element, or an acceleration sensor may be employed.

The detected strain sensor signal is input to the sensor signal processing unit 15, the curvature (sensor information) is calculated based on the strain sensor signal, and is output to the control unit 7. The control part 7 calculates | requires distortion energy with the following formula | equation (2) using this curvature.

Where M = EI / ρ, M: moment, EI: stiffness of object, 1 / ρ: curvature, ε: strain value (sensor signal), R: outer radius of fishing rod, and 1 / ρ = ε / Let R be.

Therefore, according to the present embodiment, it is possible to obtain the curvature based on the strain actually measured by disposing strain sensors at a plurality of specific positions of the fishing rod. The control unit 7 uses, for example, the curvature obtained from the actual measurement value and the setting item separately set by the setting condition setting unit 6, for example, strain energy and strain energy distribution among physical elements by the processing program. Calculation may be performed, graphed, and output. Based on these strain energy and strain energy distribution, the determination unit 8 compares the past data previously recorded in the data unit 9 with the pass / fail determination as in the first embodiment described above.

FIG. 11 is a diagram conceptually showing a process of designing and manufacturing a fishing rod in the second embodiment. In this fishing rod design / manufacturing process, a sensor information process is added to the design / manufacturing process in FIG. 2 described above, and sensor information acquired by this sensor information process is input to the design process. The sensor information includes sensor information obtained in the prototype process and the actual fishing inspection process and its correction information, and the latest information is added or updated to the accumulated information. This sensor information is stored in the sensor signal processing unit 15 or a memory in the control unit 7.

According to the present embodiment described above, strain energy and strain energy distribution are calculated based on a highly accurate curvature based on a sensor signal (strain value) measured using a strain sensor with respect to an actual fishing rod. More accurate pass / fail judgment can be made. Therefore, the evaluation quality can be improved and the design time can be shortened.

Also, this embodiment can be used as a correction of actual measurement values or as a support for simulation results in combination with the simulation processing in the first embodiment described above. In addition, if the strain energy distribution is calculated only by actual measurement according to the present embodiment, a high-performance calculation function for performing the simulation process is unnecessary, and a simple personal computer can be used as the control unit.

Further, the correlation between the strain energy and strain energy distribution by the sensor signal used in this embodiment and the strain energy and strain energy distribution obtained by the simulation processing of the first embodiment is investigated and saved as data. May be. In this way, when a fishing rod having substantially the same material and specifications is designed later, the strain energy and strain energy obtained by the simulation process are used for the strain energy and strain energy distribution. A determination can be made by estimating an actual measurement value of the energy distribution.

FIG. 12 is a diagram showing a conceptual configuration of a fishing rod design system according to the third embodiment. In this embodiment, the same components as those in the first embodiment described above are denoted by the same reference numerals, and detailed description thereof is omitted. The fishing rod design system 1 according to the present embodiment is configured to recognize a curved shape of a fishing rod from a photographed image, obtain a curvature from the position coordinates of a region of interest, and calculate strain energy.

The present embodiment shown in FIG. 12 includes a physical element calculation unit 2, an input unit 3, a display unit 4, a plurality of external terminals 5, and a photographing unit 16. As the photographing unit 16, a high-speed photographing camera or a progressive video camera that is equipped with a solid-state imaging device such as a CCD or a CMOS and can continuously photograph still images can be used. A continuous still image (image data) is output.

The physical element calculation unit 2 acquires a continuous still image captured by the imaging unit 16, calculates the curvature from the position coordinates of the target region of the image data, and a setting in which the calculated curvature is provided in advance. A setting condition setting unit 6 which is stored in a table and selects the above-described resin materials or parts and sets other physical elements, a control unit 7 which calculates strain energy, an input unit 3, strain energy and strain energy It comprises a determination unit 8 that performs pass / fail determination on the result of distribution (measurement calculation value), the data unit 9 described above, and an I / O port 11.

Referring to FIG. 13, the calculation of the curvature from the captured image will be described. FIG. 13 is an overlay of the image of the first form 12a of the fishing rod and the image of the second form 12b of the fishing rod in which the load 14 is suspended from the tip of the fishing rod of the first form 12a. Two continuous images are shown.

In FIG. 13, attention positions P1 to P9 (P1 'to P9') and P10 to P13 are set on the fishing rod of the photographed image. These attention positions P have two-dimensional position information on the image. This position information is obtained by setting a reference of the X axis-Y axis (coordinates 0, 0) to a common position (for example, buttock) of two images, It can be expressed by the position coordinates of the x coordinate and the y coordinate. Or you may use the pixel position of a solid-state image sensor as a position coordinate of an attention site.

Using these position coordinates and known image processing software, the curvature of each target position P in the first form 12a and the second form 12b is calculated from the position coordinates on the curve. Note that the outer diameter R of the fishing rod required for calculating the strain energy is obtained by photographing the reference scale in advance, taking a correlation with the size of one pixel, and counting the number of pixels in the outer diameter portion of the photographed fishing rod. The outer diameter of the fishing rod at each target position P can be calculated. Using the calculated curvature and outer diameter, the control unit 7 calculates strain energy according to the above-described equation (1), and further calculates strain energy distribution of the entire fishing rod.

According to the present embodiment described above, the strain energy and the strain energy distribution can be calculated using the curvature obtained from the photographed fishing rod image. Therefore, it is not necessary to set parameters such as numerical values for performing the simulation process, and the curvature can be obtained from the curved two-dimensional image. For example, even if an actual fishing rod is not photographed, the curvature can be obtained even with a curved fishing rod pattern drawn on paper. In particular, even when measurement is required during actual fishing on a river or ship where the measurement substrate cannot be taken out, strain energy and strain energy distribution can be calculated if there is a photographed image. Note that the manufacturing process of the fishing rod in the third embodiment is similar to the manufacturing process of the second embodiment described above, and image information such as curvature obtained from the image is used instead of the sensor signal. Data such as curvature acquired from the fishing rod image is stored as image information in the memory of the control unit 7 or the like.

Also, the required curvature can be easily obtained without the need for mounting a strain sensor or the like. Furthermore, like the second embodiment described above, this embodiment can also be used as a correction based on actual measurement values or as a support for simulation results in combination with the simulation processing in the first embodiment.

Next, a fishing rod design system according to a modification of the third embodiment will be described. The configuration of this modification is the same as that of the third embodiment, and the calculation method is different. About this modification, the same referential mark is attached | subjected to the component equivalent to 1st Embodiment mentioned above, and the detailed description is abbreviate | omitted. The fishing rod design system of this modification example uses the image correlation method to obtain the curvature from the change in the position coordinates at the attention site for a plurality of attention sites set on the fishing rod included in the continuously shot images, This is a configuration for calculating strain energy.

The physical element calculation unit 2 acquires a continuous still image captured by the imaging unit 16 and stores the calculated curvature in a setting table provided in advance, and an image processing unit 17 that calculates the curvature by comparing image signals. The above-mentioned setting condition setting unit 6 for selecting the resin material or part and setting the physical element, the control unit 7 for calculating the strain energy, the input unit 3, the strain energy and the strain energy distribution (measurement calculation value) The determination unit 8 that performs pass / fail determination on the result, the data unit 9 and the I / O port 11 described above.

Referring to FIG. 13, the calculation of the curvature from the captured image will be described. FIG. 13 is an overlay of the image of the first form 12a of the fishing rod and the image of the second form 12b of the fishing rod in which the load 14 is suspended from the tip of the fishing rod of the first form 12a. Two continuous images are shown. The background image is the same as the image in the first form 12a and the image in the second form 12b.

In FIG. 13, attention positions P1 to P9 (P1 ′ to P9 ′) and P10 to P13 having position information (x, y) are set for the fishing rod 12 on the photographed image 100.

The attention position P is, for example, a tip, and a plurality of pixels corresponding to the position are set as the attention pixel area. Since the target pixel region is configured as an arrangement of a plurality of pixels having a luminance difference, it can be recognized as a feature pattern. If the attention position P in the second form 12b of the fishing rod is detected based on the feature pattern of the attention position P set in the first form 12a of the fishing rod, the movement of the attention position P can be detected. Since the movement distance of the target position P (feature pattern) can be calculated based on a change in position coordinates, the amount of strain can be derived based on this movement distance.

Shoot the fishing rod 12 when no load is applied or when the device is turned on, and then shoot the fishing rod with the load (fish) applied. By these photographing, an image of the first form 12a of the fishing rod and an image of the second form 12b of the subsequent fishing rod are acquired. A plurality of attention positions P1 to P13 are set on the fishing rod of the first form 12a of the photographed fishing rod, and image correlation is performed on the image of the fishing rod of the second form 12b, so that attentions of the attention positions P1 to P13 are obtained. Based on the feature pattern of the pixel area, attention positions P1 ′ to P13 ′ in the image of the second form 12b are detected. The outer diameter of the fishing rod can be calculated by counting the number of pixels as described above.

The movement distance of each target position is calculated based on the position information (coordinate position) at the target positions P1 to P13 and the target positions P1 'to P13', and is used as the distortion amount. By performing this calculation for all positions of interest, the strain energy distribution of the entire fishing rod can be calculated.

According to this modification described above, the strain energy distribution can be calculated by the arithmetic processing in the first embodiment described above from the strain amount obtained by the image correlation method from the photographed fishing rod image. According to this modification, it is possible to obtain the same effects as those of the third embodiment. In addition, the required curvature can be easily obtained without the need for attaching a strain sensor or the like.

Claims (9)

1. It is a design system for a resin long member that is deformed by an external load,
   Based on input information from the operator, a setting unit for setting design information necessary for designing the resin long member,
   A calculation unit that calculates a physical element in a state where the resin long member based on the set design information is deformed by the external load;
   A determination unit that determines pass / fail of the design information based on a calculation result of the physical element by the calculation unit;
   Design system with
2. A storage unit for storing a reference value of the physical element;
   The determination unit determines pass / fail of the design information based on a comparison between a calculation result of the physical element by the calculation unit and a reference value of the physical element stored in the storage unit.
   The design system according to claim 1.
3. The design system according to claim 1, wherein the calculation unit calculates strain energy as the physical element.
4. The setting unit includes, as at least a part of the design information, a rigidity at a predetermined position of the resin long member and a moment at the predetermined position of the resin long member in a state of being deformed by the external load. Set,
   The calculation unit calculates strain energy at the predetermined position based on the rigidity and the moment.
   The design system according to claim 3.
5. The setting unit includes, as at least a part of the design information, a rigidity at a predetermined position of the resin long member and a curvature at the predetermined position of the resin long member in a state deformed by the external load. Set,
   The calculation unit calculates strain energy at the predetermined position based on the rigidity and the curvature.
   The design system according to claim 3.
6. An actual measurement value input unit for inputting an actual measurement value of strain energy in a state where the resin long member is deformed by the external load;
   The calculation unit uses the actual measurement value input by the input unit as the strain energy.
   The design system according to claim 3.
7. An image input unit for inputting an image including at least an image before the resin long member is deformed by the external load and an image after the resin long member is deformed by the external load;
   The calculation unit calculates the strain energy based on the image input by the image input unit.
   The design system according to claim 3.
8. The design system according to claim 7, wherein the calculation unit calculates the strain energy using an image correlation method.
9. The design system according to claim 1, wherein the long resin member includes a fishing rod or a golf club shaft.

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