JP2013153740A - Design system for long resin member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prepare a prototype by a design based on past preparation data and experience and to determine the specifications of a product by making adjustments based on a sensory evaluation result by the actual fishing of a specialist inspector in manufacturing a fishing rod made of a tubular resin material.SOLUTION: A design system for a tubular resin member designs the tubular resin member by adding digitized physical elements computed by moment acting on the tubular resin member and rigidity, as design items to parameters of physical elements in length, outer diameter, weight, wall thickness, laminated structure, rigidity, the amount of resin and the arranged direction of fibers which are used in a normal rod design time, and incorporating a sensory evaluation into the physical elements.

Description

  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.

  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.

  Usually, when producing a long resin member having new characteristics, specifications are determined based on past production materials and experiences. 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 because it is difficult to set these specifications at the design stage, because the current design technology does not quantify the sensibility evaluation of fishing rod operability and turrets.

  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, This is a cross-border design change due to repeated confirmation by actual fishing, which increases the time and cost of making a large number of prototypes, 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.

  In order to achieve the above object, the resin long member design system according to the embodiment according to the present invention provides a long resin long member to which an external load is applied, at least from setting items based on dimensions, weight, material, and internal structure. A calculation unit that generates a physical element quantified by the acting moment and rigidity, and the physical element calculated from the calculation unit are compared with a predetermined determination criterion, and are matched or determined in advance. A resin including a determination unit that determines a physical element within a range as good, the physical element that is determined as good by the determination unit, and the setting items of the dimensions, weight, material, and internal structure as a design item And a design section for setting production conditions for the tubular member.

  According to the present invention, kansei evaluation related to a tubular or plate-like long member formed of a resin material is captured as a physical element that has been digitized, and the desired specification of the tubular or plate-like shape is obtained from the physical element. A design system for a resin long tubular member for designing a long member can be provided.

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.

  Generally, a fishing rod made of a fiber-reinforced resin material impregnated with a resin defines a desired length, outer diameter, etc., and physical quantities such as weight and rigidity (bending rigidity, torsional rigidity) and distribution thereof (hereinafter, These are referred to as physical elements or physical quantities) and can be produced by selecting materials in accordance with specifications. The sensibility evaluation referred to in the present embodiment is mainly operability (tame operation, pulling operation, extraction operation, etc.) that occurs in the operation of the fishing rod when the angler actually fishes and makes a sensuous judgment. . Here, the term “tame” indicates a rigidity balance over the entire rod that can lead the fishing rod operation (raising and lowering the rod and pulling the rod tip) when a large load (fish) is applied to the rod and curves. 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, and, like the kite length, the outer diameter depends on the target fish or the load applied by the device. The diameter is set. In the case of a tubular structure (hollow shape), the thickness and the inner diameter are also included. The outer diameter of the ridge 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] A separation structure is employed for carrying, and the number of short ridges (pieces or numbers) when separated. A fishing rod without a joint is called a total rod or a one-piece rod. In addition, both the parallel splicing and the swinging out are handled with the same splicing number. However, there are a plurality of different joint structures, which differ in strength.

  [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 curvature using an image. For example, the curvature at a plurality of positions of interest set on a curved fishing rod curve is calculated using the pixel position of the image sensor as position information. Alternatively, for a continuous image taken with a load applied to the fishing rod, the attention pattern region of the pixel of interest and its surrounding pixels is set on the fishing rod. Using a known image correlation method, a target pattern region between images is found, a distortion is detected from these differences, and a curvature is calculated using the 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. Further, the bending 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. This fishing rod has a cylindrical tubular structure with an internal space and a solid structure without an internal space. The rigidity varies depending on the stacking order of the fiber reinforced resin materials having different elastic reinforcing fibers. In addition, let the lamination structure including the fiber direction of a sheet | seat member and the number of lamination | stacking be an internal structure.

  [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 range amount 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. The resin material including the resin amount of the sheet member is a resin material.

  [Rigidity (elastic modulus)] It is difficult to be deformed by bending or twisting in a fishing rod. 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 varies depending on the fiber direction, and is weakest in the longitudinal direction (0 degree) and lateral direction (90 degrees) of the ridge, and is largest in the oblique direction 45 °. When the torsional rigidity is weak, for example, when a load is applied to a plurality of guides provided on a fishing rod obliquely (rotational direction) with respect to the longitudinal direction (axial direction) of the rod, the upward outer guide tilts laterally, Operability deteriorates. 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 parameters that are set when designing a known main fishing rod. These physical elements have a mutual influence relationship, and if one physical element is changed, the other physical elements are also affected. 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 based on moment and rigidity. Usually, as shown in FIG. 3, when an external force (for example, a load by a fishing fish) is applied to the tip of a fishing rod, bending occurs over the entire rod. Specifically, when the angle θ1 is held with the heel as the fulcrum and the angler 1 gripped by the angler's hand as the support position, a load load acting in the direction of the angle θ2 acts and a multiplying curve is generated.

  When a load is applied to the tip of the fishing rod, it is deformed by hanging from the tip of the rod to the bottom of the rod, so that energy to return to the original shape is generated throughout the fishing rod and 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 has the same shape with respect to the applied force, the component portion made of the hard material has a small strain, and the component portion made of the soft material has a large strain. As described above, when strain occurs, a force is generated to return to the original shape. In a fishing rod, the bent rod is the energy that tries to return to its original straight state and is an important physical element of the design.

In the embodiment described below, a specific numerical value for comparison for calculating a plurality of strain energies at a plurality of specific positions (hereinafter referred to as specific positions) arbitrarily determined on a fishing rod and performing a pass / fail judgment described later. Or it uses as energy distribution.
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, where M is moment, EI is object rigidity, and 1 / ρ is curvature.

  When applying strain energy to a fishing rod, the strain energy at a plurality of specific positions determined from the tip of the rod to the bottom of the rod 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. It is also possible to place a known strain sensor at a specific position of the actual fishing rod, perform an actual measurement, and check the calculation result by simulation.

Next, a fishing rod design simulation 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. FIG. 8 shows a fishing rod hanging curve according to a conventional design technique. FIG. 7 shows the bending rigidity calculated using the diameter of the ridge at each position of the ridge and the elastic modulus of the fiber-reinforced resin material. 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, multiplication of fishing rods S1 and S2 when the same load [g] is applied to the rod tips of two fishing rods S1 and S2 having the same length, diameter, tone and weight load of the target fish. The curve is shown. Note that a plurality of steps on the characteristic curve of the bending stiffness shown in FIG. 7 shows steep changes that occur because the seam portion of the fishing rod is made more rigid. In contrast, in a seamless fishing rod such as a one-piece rod, the change is linear.

  If the characteristics are different, the bending rigidity and the multiplying curve become two characteristic curves that are shifted, but here, they are substantially coincident and overlapped. In other words, it has the same characteristics in appearance. Therefore, it is determined from this evaluation result that the fishing rod has the same characteristics.

  However, when actual fishing was performed, in the sensuous evaluation by a specialized 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 obtained as a numerical value in previous simulations.

Therefore, in 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 is a diagram showing a strain energy distribution (energy characteristic) obtained by simulation stored in the fishing rods S1 and S2 in a state where a light load (for example, a load due to a device and a decoy rod) is applied to the rod tip under actual fishing. It is. This figure shows the distribution of a predetermined range from the heel tip to the buttock side. The light load means a load on the light side within the weight load allowable range of the fishing rod, and suggests, for example, a state where the device is submerged in water (or in the sea). Moreover, in the following description, the medium load means a medium load within the weight load allowable range, and suggests, for example, a load applied when a fish is applied. Similarly, a large load means a load on a heavy side within a weight load allowable range. For example, a load applied when a fish is caught (or when a fishing line is wound) or a load applied when a fish is pulled out. Suggest.

  As shown in FIG. 3, it is assumed that the tip of the fishing rod is lifted and the inclination is maintained at an arbitrary angle (for example, 45 °). Strain energy is calculated for each position and plotted at each specific position on the fishing rod. However, when the plots do not line up in a linear shape, 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, the strain energy is the highest at a specific position m that is moved from the tip side to the bottom side, for example, a distance of less than 10% of the rod length. A peak is set. The change in the strain energy characteristic of the fishing rod S1 forms a smooth and linear U shape from the peak specific position m to the bottom of the rod. In the fishing rod S2, a peak is set at the same specific position m as the fishing rod S1, and the peak value is higher 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, when the fishing rod S1 is determined to be good and the fishing rod S2 is determined to be defective, the change in the strain energy characteristics of the fishing rod S2 is a sharp change with a large swing width from the tip of the fishing rod S1. In addition, the characteristic curve has uneven steps and is not a smooth transition. In other words, when viewed from the whole fishing rod, the strain energy is concentrated at a specific position and the energy change is not smoothly transmitted to the buttock, so small changes occurring at the tip of the rod are sent sensibly to the angler. It can be determined that it is not. That is, the fishing rod S2 gives a sensibility evaluation that the decoy operation is difficult to execute because the change of the pull from the decoy (fish trust) is not well transmitted.

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

  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. The change in the strain energy characteristic is smoothly and linearly decreased in the fishing rod S1 from the specific position m of the peak toward the buttock side. In the fishing rod S2, a peak value higher than that of the fishing rod S1 is set at the same specific position m as the fishing rod S1. From the specific position m of the peak toward the bottom of the rod, it smoothly decreases so that the difference from the energy characteristics of the fishing rod S1 decreases.

  The change in the strain energy characteristics of the fishing rod S2 is a sharp change in which the strain energy is greatly concentrated at a certain position m and the deflection width from the tip of the fishing rod is larger than that of the fishing rod S1. In other words, the fish faith (load fluctuation) when the fish produced at the tip of the hook is accumulated at a specific position, and with the decrease in the size of the fish faith, a transmission loss for the accumulated time occurs. Transmission of energy change from the tip to the buttock side is delayed. Therefore, the fisherman is not satisfied with the sensibility evaluation of the fish transmission delay that the fish was caught.

Further, FIG. 6 was obtained by a simulation stored in the above-described fishing rods S1 and S2 when a large load (for example, a load at the time of pulling a fish caught or a load at the time of withdrawal) was applied to the rod tip under actual fishing. It is a figure which shows distribution (energy characteristic) of strain energy.
Comparing the energy characteristics of these fishing rods S1 and S2, the peak with the highest strain energy is set at a specific position where the distance from the tip of the rod is about 1/4 of the rod length to the rod tail side.

  In the fishing rod S1, the change in the strain energy characteristic is directed from the specific position n of the peak toward the buttock side and forms a smooth and slow U-shape. In the fishing rod S2, a peak value higher than that of the fishing rod S1 is set at a specific position p closer to the center of the rod tail than the fishing rod S1. It goes from the specific position p of the peak toward the rod end, intersects with the characteristic curve of the fishing rod S1, and once becomes an energy value lower than that of the fishing rod S1.

  As for the change in the strain energy characteristics of the fishing rod S2, the swing width is greatly changed from the center of the buttocks to the side of the buttocks as compared to the fishing rod S1. That is, when viewed from the whole fishing rod, the strain energy is largely accumulated near the center of the buttock side, so that the rigidity is small, and the strain energy is lowered toward the buttock side, so that the rigidity is increased. Therefore, the fishing rod S2 has a characteristic that the center of the buttock side is hard and bends more, and the angler receives a sensibility evaluation that the operability is free from the fisherman.

  Further, the strain energy distribution obtained with the fishing rod S1 with good sensitivity evaluation is stored as a reference for comparison, and is used as a comparison reference 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 a 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 performs selection and setting of physical elements according to an instruction from the control unit (processing unit: CPU) 7 that performs calculation processing and communication processing related to the physical elements described above and the input unit 3. Parameter data for storing as a database a setting condition setting unit 6 having a plurality of setting tables, and parameters for selecting and setting the setting condition setting unit 6 (for example, eigenvalues defined by a resin material or a part to be used) Of the calculated physical elements, for example, a determination unit 8 that performs pass / fail determination on the result of strain energy and strain energy distribution (simulation value), past data processed so far, and actual It is comprised with the data part 9 which memorize | stores and associates the evaluation result by fishing.

  The parameter data unit 10 is a database that stores data relating to each part and material for producing the latest item information and a fishing rod such as a resin material. One component unit that combines the parameter data unit 10 and the data unit 9 may be used.

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 an external device, such as a personal computer used by a designer connected via a network such as a LAN through the I / O port 11.
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 sets parameters necessary for design specifications for each setting item on the display screen in order to execute calculation (simulation) in the control unit 7. As setting items (setting screens), for example, input the length, outer diameter, guide position, eigenvalues of parts and resin materials used, fiber direction, thickness, laminated structure, elastic modulus of resin materials, etc. as parameters. To set.

  The control unit 7 calculates, for example, strain energy and strain energy distribution among physical elements using a preset processing program including the above-described equation (1). 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 constitute an arithmetic unit.

  For example, the strain energy at a plurality of specific positions of the fishing rod is calculated, and the distribution based on the specific positions of the fishing rod and the calculated values is graphed as shown in FIGS. In addition, when accessed by each external terminal 5, the control unit 7 performs arithmetic processing according to an input instruction of the terminal. In the system, the control unit 7 may provide information such as various data in accordance with a request from each external terminal 5, perform calculation processing in each external terminal 5, and execute a simulation.

  The determination unit 8 compares or refers to past data previously recorded in the data unit 9 with respect to energy characteristics including, for example, strain energy and strain energy distribution among the calculated physical elements. A pass / fail judgment is made based on the evaluation attached to the data. For example, the calculated strain energy distribution is compared with a strain energy distribution that is a criterion set by past data, and a strain energy distribution that matches or approximates is searched. Based on the evaluation attached to the retrieved strain energy distribution, the characteristics of the newly obtained strain energy distribution are extracted, and good / bad is determined.

  This determination is determined to be good when it is within a predetermined determination range that matches the strain energy distribution of the determination criterion. Within the determination range, it is set on the basis of data of fishing rods that have been used in the past (manufactured fishing rods or fishing rods with good sensitivity evaluation results). At that time, a defective portion in the strain energy distribution may be displayed by color display or the like to notify the portion of the fishing rod to be corrected.

FIG. 2 is a diagram conceptually illustrating a process of manufacturing a fishing rod.
The process of manufacturing the fishing rod in the present embodiment is a design specification process in which the concept of the fishing rod is determined by a meeting or the like, a design process in which the design settings are input by each designer in consideration of the feedback of the Kansei evaluation results. , Physical elements by input settings, for example, a physical element calculation process for calculating strain energy and strain energy distribution, a prototype process for creating a fishing rod prototype based on the physical elements, an actual fishing inspection process by an inspector, There are a sensitivity evaluation process for obtaining an evaluation from an inspector who has actually fished, and a manufacturing process for a product according to the determined specifications.

Below, each cocoon manufacturing process is demonstrated.
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, a detailed design item of a fishing rod that realizes the concept proposed by the input unit 3 is input to the setting condition setting unit 6. For example, the design item is displayed on the setting screen displayed on the display unit 4 by parameter selection input from the parameter data unit 10 or direct input, for example, the length, outer diameter, number of joints, number of guides and arrangement position, weight, etc. Then, selection settings such as the type of the resin material and the carbon fiber direction are input.

  In the physical element calculation step, the physical element calculation unit 2 obtains the moment and bending stiffness by simulation based on the input set items. Furthermore, strain energy is calculated from the above-described equation (1), and a strain energy distribution is created. Further, the determination unit 8 uses the strain energy and strain energy distribution calculated in the physical element calculation step as the determination criteria, using the past strain energy and strain energy distribution already recorded in the data unit 9 as a determination criterion. It is determined whether it is a calculation result.

  In this determination, if the determination criteria match or approximate, it is determined that the strain energy and strain energy distribution are good, and the process proceeds to a prototype process. On the other hand, as shown in FIG. 4 to FIG. 6 described above, when a local difference, energy distribution difference, or steep change occurs with respect to the determination criterion, the design process is returned to and the design is changed. . When the design is changed, the rigidity balance is mainly adjusted.

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 to be a prototype is produced according to the items set in the design process. After the production, the performance test of the fishing rod that has been performed conventionally will be conducted.

  Next, in the actual fishing inspection process, an actual fishing 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 the design is changed. The determination result is registered in the setting table provided in the data unit 9 in association with the strain energy and the strain energy distribution to the setting item set by the setting condition setting unit 6. 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 elements obtained by the moment acting on the fishing rod and the bending rigidity 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, the manufacturing cost can be reduced by reducing the number of prototypes produced, and the product production period can be shortened. 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 shared judgment 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 illustrating 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 lowers the load 14 to obtain a strain signal from the actual curved state of the fishing rod 12. Is detected and strain energy is calculated. The strain sensors shown in FIG. 10 are arranged substantially evenly, but according to the tone of the heel, the tips are arranged densely by narrowing the tip-side arrangement interval, and the heel-end side arrangement interval is widened and arranged roughly. For example, the arrangement can be changed as appropriate so that the sensor signal can be detected in detail from a location focused on the design.

The present 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 is necessary for the sensor signal processing unit 15 that calculates strain energy from the sensor detection signals (strain values: ε) from the strain sensors S1 to S13, and for the selection and physical element design specifications described above. A setting condition setting unit 6 for performing appropriate parameter setting, and 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 and the like). And an input unit 3, a determination unit 8 that performs pass / fail determination on the results of strain energy and strain energy distribution (actually measured values), and a data unit 9.

  The strain sensor 13 uses a known metal strain gauge to detect a sensor signal including a change in electric resistance value using a bridge circuit as an 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 sensor signal is calculated as a curvature (sensor information) obtained from the actual value of the fishing rod in the sensor signal processing unit 15 and output to the control unit 7. The control part 7 can obtain | require 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 by actual measurement by arranging the 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 or refers to past data previously recorded in the data unit 9 and attaches it to past data, as in the first embodiment described above. A pass / fail judgment is made based on the evaluation.

  FIG. 11 is a diagram conceptually illustrating a process of manufacturing a fishing rod in the second embodiment. In this fishing rod manufacturing process, a sensor information process is added to the manufacturing process in FIG. 2 described above, and sensor information is added to the design process. The sensor information includes the sensor information obtained in the trial production process and the actual fishing inspection process and the correction information thereof, and the latest information is added or updated to the information accumulated so far. This sensor information is stored in the sensor signal processing unit 15 or a memory in the control unit 7.

  According to the 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. Thus, it is possible to make a more correct quality determination. Therefore, the evaluation quality can be improved and the design time can be shortened.

  In addition, this embodiment can also be used as a correction by 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 not necessary, 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 the present embodiment and the strain energy and strain energy distribution obtained by the simulation processing of the first embodiment is investigated and stored as data. . Later, when designing fishing rods of substantially the same material and specifications, the strain energy and strain energy distribution measured by using the above-described correlation with the strain energy and strain energy distribution obtained by the simulation process. It can replace with and can perform determination.

FIG. 12 is a diagram illustrating 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 of the present embodiment is configured to extract 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.

  This 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 5, a high-speed photographing camera or a progressive video camera that is equipped with a solid-state imaging device such as a CCD or 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 and calculates the curvature from the position coordinates of the target region of the image signal, and a setting in which the calculated curvature is provided in advance. A setting condition setting unit 6 that stores in the table and sets the above-described selection and other physical elements, a control unit 7 that calculates strain energy, an input unit 3, strain energy and strain energy distribution (measurement calculation values) ) And a data unit 9 described above.

  With reference to FIG. 13, calculation of curvature from a captured image will be described. FIG. 13 shows two continuous images obtained by superimposing the image of the first form 12a of the fishing rod and the image of the second form 12b of the subsequent fishing rod. Here, it is assumed that the first form 12a of the fishing rod moves to the second form 12b when the load 14 is suspended.

  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. Each of these attention positions P has two-dimensional position information on the screen. This position information is obtained by arbitrarily setting a reference of the X axis and the Y axis (coordinates 0 and 0) at a common position (for example, buttock) on the screen of two images, and for each attention site (for example, 竿Can be expressed by the position coordinate of the x coordinate or the y coordinate. Or you may use the pixel position of a solid-state image sensor as a position coordinate of an attention site. Other than the position coordinates, the buttock may be applied to the graph of distance and height with the origin (0).

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 each position coordinate on the curve (curved surface). Note that the outer diameter R of the fishing rod necessary 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 of the photographed fishing rod. The outer diameter of the fishing rod 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. In other words, the curvature can be obtained even if a picture of a curved fishing rod drawn on paper is taken without photographing an actual fishing rod. In particular, when measurement is required in a river or a ship where the measurement base material cannot be taken, such as during actual fishing, if there is a photographed image, the strain energy and the strain energy distribution can be calculated. The process for manufacturing a fishing rod in the third embodiment is similar to the manufacturing process in the second embodiment described above, and uses image information such as curvature obtained from an image instead of the sensor signal. . Data such as curvature obtained from the fishing rod image is stored in the memory of the control unit 7 as image information.

In addition, the required curvature can be easily obtained without the need for attaching 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 the present modification extracts the time-series curved form of the fishing rod using the image correlation method for a plurality of attention sites set on the fishing rod included in the continuously shot images, In this configuration, the strain energy is calculated by obtaining the curvature from the change in the position coordinates at the site of interest.

  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-described setting condition setting unit 6 for performing selection and setting of physical elements, the control unit 7 for calculating strain energy, the input unit 3, and the results of strain energy and strain energy distribution (measurement calculation values). It comprises a determination unit 8 that performs pass / fail determination and the data unit 9 described above.

  With reference to FIG. 13, calculation of curvature from a captured image will be described. In FIG. 13, it is considered that two continuous images in which the image of the first form 12a of the fishing rod and the image of the second form 12b of the subsequent fishing rod are superimposed are shown. Here, the background images other than the fishing rod are not considered as being completely equivalent.

Here, it is assumed that the image position of the fishing rod in the first form 12a moves to the image position of the fishing rod in the second form 12b when the load 14 is suspended.

  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. In this case, P10 to P13 actually include P10 'to P13', but since no shape change has occurred, P10 to P13 are simply indicated as P10 to P13.

  The target position P is, for example, a target image of the tip, and is a target pixel region including the target pixel and its surrounding pixels. This target pixel region has a certain feature pattern based on a pixel group having a luminance difference. An image region that approximates, that is, has a correlation with, the feature pattern (attention position P) set in the first form 12a of the fishing rod is extracted from the subsequent images and exists in the second form 12b. Let it be a feature pattern (attention position P ′). That is, it is determined that the image position of the fishing rod of the first form 12a has moved to the image position of the fishing pole of the second form 12b, that is, has moved due to distortion caused by the load. If this moving distance is the amount of strain, it can be derived from the difference in coordinates.

  Therefore, the fishing rod 12 when no load is applied or when the device is thrown in is photographed, and then the fishing rod in a state where a load (fish) is applied is photographed. 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, image correlation is performed on the fishing rod image of the second form 12b, and attentions of the attention positions P1 to P13 are obtained. An image area having a feature pattern similar to the image is set on the fishing rod 12 as the target positions P1 ′ to P13 ′. The outer diameter of the fishing rod can also be calculated by counting the number of pixels, as described above.

  Next, the difference between the position information (coordinate positions) at the positions of interest P1 to P13 and the positions of interest P1 'to P13' is taken and detected as a 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 from the photographed fishing rod image by the image correlation method. 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.

Embodiments of the present invention include the following gist.
(1) a setting unit for setting the numerical values of the specific physical elements related to the dimensions of the fishing rod based on the design specifications, the internal structure, and the material used for formation;
Based on the set physical elements, when a load is applied to the formed fishing rod, it calculates the strain energy and strain energy distribution, which are physical elements expressed by the moment and stiffness acting on the fishing rod. And a calculation unit that generates as a curve characteristic stored in the whole fishing rod;
A determination unit that determines pass / fail by comparing the strain energy distribution generated by the arithmetic unit with a strain energy distribution that is a predetermined determination criterion;
A fishing rod design system comprising:

(2) The physical element calculated by the calculation unit is further
It includes weight, bending rigidity, torsional rigidity, strength, tone, curvature, resin amount, curve with or without guide, weight distribution, moment of inertia, and resin sheet material alignment. A fishing rod design system.

  DESCRIPTION OF SYMBOLS 1 ... Fishing rod design system, 2 ... Physical element calculating part (design part), 3 ... Input part, 4 ... Display part, 5 ... External terminal, 6 ... Design condition setting part, 7 ... Control part (arithmetic processing part), DESCRIPTION OF SYMBOLS 8 ... Determination part, 9 ... Data part, 10 ... Parameter data part, 11 ... I / O port, 12 ... Imaging | photography part, 13 ... Image processing part.

Claims (6)

An arithmetic unit that generates a physical element quantified by the moment and the rigidity acting on the resin long member subjected to an external load, at least from the setting items based on the dimensions, weight, material, and internal structure,
A determination unit that compares the physical element calculated from the calculation unit with a predetermined determination criterion, and determines that a physical element that matches or falls within a predetermined determination range is good,
The design element that includes the physical elements determined to be good and the setting items of the dimensions, weight, material, and internal structure as design items, and sets production conditions for the long resin member;
The resin long member design system characterized by comprising. The calculation unit in the design system has the moment (M: EI / ρ, where 1 / ρ: curvature) and the bending stiffness (EI) as strain energy as the physical element.

The system for designing a long resin member according to claim 1, wherein the physical element is calculated by: The physical element calculated by the calculation unit is further
The bending rigidity, torsional rigidity, strength, curvature, weight, resin amount, curve with or without guide, weight distribution, moment of inertia, and a combination of resin sheet materials are included. Resin long member design system.   4. The resin long member design system according to claim 1, wherein the resin long member is one of a fishing rod and a golf shaft. The calculation unit in the design system includes a strain sensor,
As the moment (M: EI / ρ, where 1 / ρ: curvature) and the bending stiffness (EI), the strain value detected by the strain sensor when the physical element is strain energy. The resin long member design system according to claim 1, which is calculated by: An imaging unit for imaging the resin long member;
An image processing unit that acquires a curvature from an image of a curved shape of a fishing rod subjected to an arbitrary load in the resin long member photographed by the photographing unit;
The moment (M: EI / ρ, where 1 / ρ: curvature) acting on the resin long member to which an external load is applied, from the acquired curvature and at least the setting items based on dimensions, weight, material and internal structure, Flexural rigidity (EI), ε: Strain, R: Outer radius of fishing rod

As a physical element, an arithmetic unit that calculates strain energy,
A determination unit that compares the physical element calculated from the calculation unit with a predetermined determination criterion, and determines that a physical element that matches or falls within a predetermined determination range is good,
The design element that includes the physical elements determined to be good and the setting items of the dimensions, weight, material, and internal structure as design items, and sets production conditions for the long resin member;
The resin long member design system characterized by comprising.

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