TWI802841B - Fishing rod evaluation method - Google Patents

Abstract

The object of the present invention is to provide an objective evaluation method of the performance of the fishing rod corresponding to the actual use state and operation of the fishing rod based on the dynamic data of the fishing rod used.

The solution of the present invention is that the fishing rod evaluation method of the present invention calculates the strain energy at predetermined positions from the tip to the tail of the fishing rod when the fishing rod is used, and evaluates the fishing rod based on changes in the strain energy at each position.

Description

Fishing rod evaluation method

The present invention relates to a fishing rod evaluation method for objectively evaluating the performance of a fishing rod based on dynamic physical characteristics.

Fishing rods are required to have various properties. Among the characteristics that are valued at the time of fishing rod design are physically measurable characteristics, for example, bending stiffness (bending stiffness) and torsional rigidity (torsional rigidity) of the rod body are mentioned.

The above-mentioned bending rigidity and torsional rigidity are physical properties of fishing rods. Although they are quantitative properties, they do not reflect the actual movement of the fishing rod. In other words, they are static physical properties rather than dynamic physical properties. The problem of objectively evaluating the performance of fishing rods.

In the past, as a method of objectively evaluating the performance of a fishing rod, for example, Japanese Patent Application Laid-Open No. 2013-153740 (Patent Document 1) discloses the use of numericalized (numeralized) sensory evaluation based on physical elements to design resins. Design system for tubular or plate-shaped long strip members.

However, the method related to Patent Document 1 may not accurately reflect the actual use of the fishing rod because it is also a so-called static physical characteristic. Therefore, it is difficult to say that the performance of the fishing rod can be objectively evaluated.

[Patent Document 1] Japanese Patent Laid-Open No. 2013-153740

One of the objects of the present invention is to provide an objective evaluation method of the performance of the fishing rod corresponding to the actual use state and action of the fishing rod by measuring the dynamic physical characteristics of the fishing rod.

Other objects of the present invention will be clarified by referring to the whole of this specification.

The evaluation method according to one embodiment of the present invention is to calculate the strain energy (strain energy) at a predetermined position from the tip to the tail of the fishing rod when the fishing rod is used, and evaluate the fishing rod based on the change in the strain energy at the predetermined position. . Furthermore, the fishing rod evaluation method according to one embodiment of the present invention is performed based on the change in strain energy at the aforementioned predetermined position, and the speed and acceleration of the fishing rod when the fishing rod is used.

In the fishing rod evaluation method according to one embodiment of the present invention, the calculation of the strain energy at the predetermined position is extraction of time series data of the strain energy at the predetermined position.

A fishing rod evaluation method according to an embodiment of the present invention is to evaluate the performance of the fishing rod based on the change of the strain energy at the predetermined position and the usage state of the fishing rod.

A fishing rod evaluation method according to an embodiment of the present invention is to calculate a change in the strain energy due to a load applied to a fisherman who holds the fishing rod. , and use this load to evaluate the fishing rod.

In the fishing rod evaluation method according to one embodiment of the present invention, the usage state of the fishing rod is a casting operation of the fishing rod.

In the fishing rod evaluation method according to one embodiment of the present invention, the usage state of the fishing rod is a pulling-in action of the fishing rod.

In the fishing rod evaluation method according to one embodiment of the present invention, the usage state of the fishing rod is the fishing rod's fishing action.

In the fishing rod evaluation method according to one embodiment of the present invention, the change in strain energy is accumulation and release of strain energy at the aforementioned predetermined position of the fishing rod.

The aforementioned predetermined position in the fishing rod evaluation method according to one embodiment of the present invention evaluates the fishing rod based on changes in strain energy at a part of the fishing rod or a plurality of positions.

According to the embodiment of the present invention, by measuring the dynamic physical characteristics of the strain energy of the fishing rod, it is possible to more objectively and accurately evaluate the performance of the fishing rod corresponding to the actual use state and operation of the fishing rod.

1: Measuring system

8: mark

10: fishing rod

20: Hammer

30: Measuring camera

Fig. 1 is an overall configuration diagram of an evaluation system according to an embodiment of the present invention.

Fig. 2 is a diagram showing the flow of an evaluation method according to an embodiment of the present invention.

Fig. 3a is a graph showing the temporal change of strain energy in the evaluation method according to one embodiment of the present invention.

Fig. 3b is a graph showing the temporal change of strain energy in the evaluation method according to one embodiment of the present invention.

Fig. 3c is a graph showing changes in lure speed and rod head speed in an evaluation method according to an embodiment of the present invention.

Fig. 3d is a graph showing the temporal change of the total strain energy in the evaluation method according to one embodiment of the present invention.

Fig. 4 is a graph showing changes in strain energy over time in an evaluation method according to an embodiment of the present invention.

Fig. 5 is a graph showing changes in strain energy over time in an evaluation method according to an embodiment of the present invention.

Fig. 6 is a graph showing changes in strain energy over time in an evaluation method according to an embodiment of the present invention.

Fig. 7 is a graph showing changes in strain energy over time in an evaluation method according to an embodiment of the present invention.

Fig. 8 is a graph showing temporal changes in a person's support force in an evaluation method according to an embodiment of the present invention.

Hereinafter, various embodiments of the present invention will be described with reference to the drawings as appropriate. In addition, the same reference symbol is attached|subjected to the common element in each drawing. Please note that the drawings may not necessarily be recorded on the correct scale for the sake of explanation.

FIG. 1 is a diagram schematically showing the overall configuration of a strain energy measurement system 1 used in the fishing rod evaluation method (hereinafter also simply referred to as the evaluation method) of the present invention. As shown in Figure 1, the measurement system 1 becomes A fishing rod 10 with markings 8 at eleven predetermined positions on the rod, a hammer 20 attached to one end of the fishing rod 10 , and a camera 30 for capturing the markings 8 are constituted. When the operator performs fishing while holding the fishing rod 10, the camera 30 captures the mark 8, and measures changes in the entire rod and at predetermined positions marked with the mark.

In addition, the measurement system 1 may be configured by further providing a holding device for holding the fishing rod 20 . Furthermore, the measurement system 1 may be configured in combination with another device other than the fishing rod 10 , the hammer 20 , and the video camera 30 .

In this manner, the illustrated measurement system 1 detects the speed and acceleration of the fishing rod 10 and the coordinates of each predetermined position of the fishing rod when the fishing rod is used. Then, the strain energy of the fishing rod 10 is calculated and evaluated from the curvature and rigidity of the coordinates of each predetermined position of the fishing rod. More details are as follows.

An evaluation method according to an embodiment of the present invention will be described with reference to FIG. 2 . In the evaluation method according to one embodiment of the present invention, first, in (S1), the curvature and rigidity of the coordinates of each predetermined position of the fishing rod 10 are detected. Next, in (S2), the speed and acceleration of the fishing rod 10 when the fishing rod 10 is used are detected by the measurement system 1 described above. Here, (S2) may be preceded by (S1), and (S1) and (S2) may be performed simultaneously. That is, in (S3), although the detection information in (S1) and (S2) is necessary, this does not mean that the order of detection itself is meaningful, but the order can be changed as appropriate.

Next, in (S3), based on the above information of the fishing rod 10 detected in (S1), the strain energy and its change at each predetermined position from the tip to the tail of the fishing rod 10 when the fishing rod 10 is used are calculated.

Then, the fishing rod is evaluated based on the change in strain energy at each predetermined position calculated in (S3). Here, in the evaluation of the fishing rod, the velocity and acceleration of the fishing rod 10 detected in ( S2 ) can be used simultaneously in addition to the change in the strain energy at each predetermined position.

According to the evaluation method according to one embodiment of the present invention, by using the dynamic data of the strain energy of the fishing rod, it is possible to more objectively and accurately evaluate the performance of the fishing rod corresponding to the actual use state and operation of the fishing rod.

In the evaluation method according to one embodiment of the present invention, the calculation of the strain energy at the predetermined position of the fishing rod is extraction of time-series data of the strain energy at the predetermined position. In this way, by using the time-series data of the strain energy at the predetermined position of the fishing rod, it is possible to more objectively and accurately evaluate the performance of the fishing rod corresponding to the actual usage state and operation of the fishing rod.

The evaluation method according to one embodiment of the present invention is to evaluate the performance of the fishing rod based on the change of the strain energy at a predetermined position of the fishing rod and the usage state of the fishing rod. This is to consider the point of view of the performance evaluation of the fishing rod, which differs depending on how the fishing rod is used. Thereby, the performance evaluation of a fishing rod can be performed more accurately according to the usage state of a fishing rod.

In the evaluation method according to one embodiment of the present invention, the usage state of the fishing rod is a casting action of the fishing rod.

In the evaluation method according to one embodiment of the present invention, the usage state of the fishing rod is a pulling-in action of the fishing rod.

In an evaluation method according to an embodiment of the present invention, The usage mode of the fishing rod is the action of fishing the fishing rod.

In an evaluation method according to an embodiment of the present invention, a change in the strain energy due to a load applied to a fisherman who holds the fishing rod is calculated, and the fishing rod is evaluated using the load. This makes it possible to evaluate the performance of the fishing rod in consideration of the load imposed on the fisherman.

In the evaluation method according to one embodiment of the present invention, the change in strain energy is accumulation and release of strain energy at a predetermined position of the fishing rod. Furthermore, the evaluation method according to one embodiment of the present invention is to evaluate the fishing rod based on changes in strain energy at some positions as predetermined positions of the fishing rod.

An example of an evaluation method according to an embodiment of the present invention will be specifically described with reference to FIGS. 3 to 8 . First, Fig. 3a and b show the time change of the strain energy at the specified position of the fishing rod when the usage state of the two types of fishing rods (rods C and D) is a throwing action, and Fig. 3c shows the time changes of the two types of fishing rods. The time change of lure speed when the use mode is throwing action. In Fig. 3a, b, the horizontal axis represents time, and the vertical axis represents strain energy. Moreover, in FIG. 3c, the horizontal axis represents time, and the vertical axis represents the lure speed.

Furthermore, Fig. 3d shows the temporal change of the total strain energy of the fishing rods when the usage state of the two types of fishing rods is a throwing action. In Fig. 3d, the horizontal axis represents time and the vertical axis represents total strain energy.

As shown in Figure 3a and b, although rods C and D both accumulate strain energy on the whole rod after the throwing action starts, more strain energy is accumulated in time series as they move towards the tail end of the rod. show. Accordingly, when the fishing rod is used in a casting action, it can be confirmed at what time Which interval strain energy is accumulated most.

In particular, it was found that the most strain energy was accumulated earlier in the rod D, and more strain energy was accumulated in the tail portion of the fishing rod of the rod D than in the tail portion of the fishing rod of the rod C. Here, the section refers to each part of the rod when it is appropriately divided into 10 sections from the tip of the rod to the tail of the rod, from the tip of the rod (section 1) to the tail of the pole (section 10).

As shown in FIG. 3 c , it was found that although both rods C and D were operated at the same casting speed, the speed of rod D increased after time 4 and continued to increase until time 20 with respect to the lure speed. Furthermore, as shown in Fig. 3d, regarding the total strain energy, it is also found that the total strain energy of rod D becomes the maximum earlier (rod D becomes the maximum around time 8, and rod C becomes the maximum around time 11), and the other The total strain energy is also accumulated more, and then more energy is released.

Thus, it was found that if referring to the time-series change data of strain energy in Fig. 3a, b, d, the strain energy of the rod causes the lure velocity to increase while the strain energy is accumulated and then released.

In this way, when the fishing rod is used in a casting action, it is possible to accurately predict which type of rod is based on the time change of each section of the strain energy of each rod and the time change of the total strain energy of each rod. It can further increase the speed of the lure.

With the evaluation method according to one embodiment of the present invention, by using dynamic data such as strain energy of the fishing rod, more objective and accurate performance evaluation of the fishing rod corresponding to the actual use state and operation of the fishing rod is possible.

Next, referring to FIG. 4 , the time change of the strain energy of the entire fishing rod is shown when the fishing rod is pulled in as the usage state of the fishing rod. In FIG. 4 , with respect to each of rod A and rod B, the horizontal axis represents time, and the vertical axis represents strain energy. The time system is divided into 20 from the zoom-in start to the end and expressed as time 0-20.

As shown in the figure, it was found that the strain energy of the rod B was largely accumulated and released at one go during the period from the start of the drawing-in operation to the time 5 . From this, it became clear that the rod B can bring fish closer earlier than the rod A.

Next, during the period from time 5 to time 8, the rod B is in a state where the strain energy is stored and removed, and the rod A is in a state where the storage and release of the strain energy are in balance. From this, it was found that the rod B is that the fish hardly moves, and that the rod A is that the fish approaches and almost always moves away.

It was found that the accumulation of the strain energy of the rod B was unstable during the time 8-14. On the other hand, it was found that the accumulation of strain energy in the rod A proceeded stably. From this, it was found that the rod A can approach the fish at a constant speed, and the difference between the rod A and the rod B is widened. This is considered to be because the rod of rod B tends to vibrate easily, and the rigid connection between the nodes is not good.

Next, during time 14 and later, both rod A and rod B exhibited and released the same strain energy as the rod as a whole.

Figure 5 shows the temporal variation of strain energy in rod intervals 7-11 (section #02) of rods A and B. Here, the section refers to each section when each pole is divided into four sections, and it is divided into # 01 section to # 04 section from the top of each pole to the end of the pole. Sections are also divided into intervals, section #01 is divided into intervals 1-6, section #02 is divided into intervals 7-11, section #03 is divided into intervals 12-15, section #04 is divided into intervals 16-18. The marked places in each section are 7 places for section # 01, 5 places for section # 02, 4 places for section # 03, and 3 places for section # 04. In addition, the number of positions of the mark may be appropriately changed according to the length of the rod (the length of the section) or the state of the rod (whether the rod is bent or not). Furthermore, the sections may be divided at equal intervals, or may be provided at narrower intervals as they go toward the tip of the pole. In the case of FIG. 5 , it is preferable to arrange sections at narrower intervals for rod heads that are easily deformed, but other methods are also possible. The horizontal axis represents time, and the vertical axis represents strain energy. As shown in the figure, it was found that in the rod section, the strain energy tends to increase from the beginning to the end of the rod A and the rod B. Furthermore, it was found that the strain energy of the rod A was accumulated much more than the strain energy of the rod B after passing through the section 10 or so. In this manner, it was found that the rod A is relatively stable when the rod is erected to draw the fish closer, and plays a large role in suppressing the movement of the fish. Furthermore, it has been found that the fish can be caught as intended by the fisherman without causing the fish to jump wildly after reaching the hand.

Figure 6 shows the temporal variation of strain energy in rod intervals 16-18 (section #04) of rods A and B. Here, the section refers to each section when each pole is divided into four sections, and it is divided into # 01 section to # 04 section from the top of each pole to the end of the pole. Sections are also divided into intervals, Section #01 is divided into intervals 1-6, Section #02 is divided into intervals 7-11, Section #03 is divided into intervals 12-15, Section #04 is divided into intervals 16- 18. These intervals may be divided at equal intervals, or may be provided at narrower intervals as they go toward the head of the pole. Also in the case of FIG. 6 , it is preferable to arrange sections at narrower intervals for rod heads that are easily deformed, but other methods are also possible. The horizontal axis represents time, and the vertical axis represents strain energy. Since the pole is in a horizontal state at the beginning, the Fish movement plays an important role. As shown in the figure, the strain energy on the pole B increases rapidly at the beginning, but the strain energy is released as the pole is erected. On the rod B, since the rigid connection between the nodes was not good, the approach of the fish was temporarily stopped. On the other hand, as shown in the figure, the rod A does not accumulate much strain energy at the beginning, but because the balance between the accumulation and release of strain energy is good, the fish will approach steadily.

From Figures 5 and 6, it is clear that compared to rod B, the energy accumulated at the telson at the end is more, and since the energy gradually decreases on rod A, as the fish approaches, the rod head plays a more important role in bringing the fish closer. And go away.

According to the evaluation method according to one embodiment of the present invention, by using the dynamic data of the strain energy of the fishing rod, it is possible to more objectively and accurately evaluate the performance of the fishing rod corresponding to the actual use state and operation of the fishing rod.

Next, the temporal change of the strain energy and the change of the support force of the person in the case where the fishing rod is used as the action of catching crucian carp are shown with reference to FIGS. 7 and 8 . In FIG. 7 , with respect to each of rod A and rod B, the horizontal axis represents time, and the vertical axis represents strain energy. The time is displayed by dividing it into 15 from the start of fishing to the end of fishing. In FIG. 8 , with regard to each of pole A and pole B, the horizontal axis represents time, and the vertical axis represents the supporting force of a person. Similarly, the time is displayed by dividing into 15 from the start of fishing to the end of fishing.

As can be seen from these figures, the accumulation and release of strain energy in the rod B do not proceed smoothly, and the human support force varies greatly. On the other hand, it has been found that the accumulation and release of strain energy on the rod A is effective throughout the entire operation. About 90% of pole B's supporting power of person moves steadily, too. In this manner, it was found that the rod A can perform the fishing operation earlier than the rod B, and also has less load on the person.

According to the evaluation method according to one embodiment of the present invention, by using the dynamic data of the strain energy of the fishing rod, it is possible to more objectively and accurately evaluate the performance of the fishing rod corresponding to the actual use state and operation of the fishing rod.

Here, the performance evaluation of the fishing rod according to one embodiment of the present invention can also be used for the action of the hook, that is, the evaluation of the vibration convergence of the rod tip and the response speed of the rod tip. Furthermore, the performance evaluation of the fishing rod according to one embodiment of the present invention can also be used for the evaluation of the operability of a fishing rig, lures, and the like. Furthermore, the performance evaluation of the fishing rod according to one embodiment of the present invention can also be used for the evaluation of the sensitivity, that is, the behavior of a fish biting a hook or a lure.

The dimensions, materials, and arrangements of the elements described in this specification are not limited to those explicitly described in the embodiments, and the elements can have arbitrary dimensions, materials, and arrangements included in the scope of the present invention. Way out of shape. Furthermore, elements not clearly described in this specification may be added to the already described embodiments, or part of elements already described in each embodiment may be omitted.

1: Measuring system

8: mark

10: fishing rod

20: Hammer

30: Measuring camera

Claims (8)

A fishing rod evaluation method used in a strain energy measurement system, characterized in that time-series data of strain energy at a predetermined position from the tip to the tail of the fishing rod when the fishing rod is used is extracted, and based on the strain energy at the predetermined position The change of this time-series data evaluates the fishing rod based on the speed and acceleration of the fishing rod when the fishing rod is used. The fishing rod evaluation method according to claim 1, wherein the performance of the fishing rod is evaluated according to the change of the strain energy at the predetermined position and the usage state of the fishing rod. The fishing rod evaluation method according to claim 1 or claim 2, wherein the change in the strain energy due to the load applied to the fisherman holding the fishing rod is calculated, and the fishing rod is evaluated using the load. The method for evaluating a fishing rod as claimed in claim 2, wherein the state of use of the fishing rod is the throwing action of the fishing rod. The fishing rod evaluation method according to claim 2, wherein the usage state of the fishing rod is a pulling action of the fishing rod. The method for evaluating a fishing rod according to claim 2, wherein the usage state of the fishing rod is the fishing rod's fishing action. The fishing rod evaluation method according to claim 1 or claim 2, wherein the change of the strain energy is the accumulation and release of the strain energy at the predetermined position. The fishing rod evaluation method according to claim 1 or claim 2, wherein the predetermined position is a part of the fishing rod or a plurality of positions.

Images