JP2005040442A - Golf club evaluation system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce the time and labor and improve accuracy of the repulsion performance evaluation of a golf club. <P>SOLUTION: The subject golf club evaluation system is provided with a server 11 connected with terminal equipment 12-1 to 12-X through a communication network N. The server 11 includes a reception means (communication means) 17 for receiving the measured result of an optional golf club G by the golf club repulsion performance testing machines 13-1 to 13-X of a specified machine kind through the communication network N, a data base 15 having golf club evaluation reference information based on the measured result by the golf club repulsion performance testing machines of the specified machine kind, an arithmetic processing means 16 for comparing and discriminating the measured result of the optional golf club received by the reception means (communication means) 17 and the golf club evaluation reference information, and a transmission means (communication means) 17 for transmitting the evaluated result of the optional golf club discriminated by the arithmetic processing means 16 to the terminal equipment 12-1 to 12-X through the communication network N. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a golf club evaluation system, and more specifically, the measurement by a tester for the resilience performance of a golf club is made highly accurate, and the evaluation criteria are unified when evaluating the resilience performance based on the measurement result. Thus, an accurate objective evaluation can be obtained.

In evaluating the performance of a golf club, the rebound performance of a golf club head, which greatly affects the flight distance performance, has attracted attention as one of the most important factors in recent years.
Conventionally, the resilience performance of the head of this golf club has been measured using a ball collision tester shown in FIG.
The ball collision testing machine includes a ball launching device 1, a ball speed measuring device 2, and an installation base 3 on which a golf club head 4 to be measured is installed. A single head is installed on the installation table 3 so that the restraining force on the head 4 is small, and the ball B is made to collide at a predetermined speed from an incident angle inclined by 2 ° with respect to the striking surface 4a of the head 4 from the vertical direction. Then, the reflection velocity of the ball 4 is measured, the restitution coefficient is calculated from the incident velocity, the reflection velocity, the ball B mass, and the head 4 mass, and the rebound performance of the head 4 is evaluated.

Before performing measurement using the ball collision tester, it is necessary to correct an error caused by variations in the tester and the ball B to be collided.
Specifically, a repulsion coefficient obtained by placing a reference metal plate of a predetermined size and weight, whose restitution coefficient is known in advance, on the installation table 3 and causing the ball B to collide with the reference metal plate is known to the metal plate. When the correction value is calculated so as to coincide with the restitution coefficient and the actual head 4 is measured, it is necessary to correct the restitution coefficient using the correction value as the measurement value.

Furthermore, in this test method, even if correction processing is performed as described above, measurement errors must be caused by the following factors (1) to (11), and variations occur even when the same head 4 is measured. Occurs, and the resilience performance of the head 4 cannot be correctly evaluated.
(1): Variation in ball B performance (weight, elastic modulus, hardness, etc.)
(2): Testing machine variation (ball launcher 1 etc.)
(3): Variation in ball B speed due to (1) and (2)
(4): Variation in ball B incident angle due to (1) and (2)
(5): Variation in the installation state of the head 4 due to the bottom surface of the head 4 being a free-form surface
(6): Variation in collision angle due to (4) and (5)
(7): (5) or variation in collision position due to flying state of ball B
(8): Reflection angle variation of ball B associated with (1) to (7)
(9): Reflection velocity measurement error due to (8)
(10): Manufacture variation of standard metal plate
(11): Measurement variation of the coefficient of restitution of the reference metal plate in accordance with (1) to (4) and (6) to (10). Since the ball launching device 1 and the ball speed measuring device 2 that launch well are required, there is a problem that the device itself becomes expensive.

Conventionally, a system that measures the resilience performance of a golf club using a testing machine and shares the measurement result via a communication network to obtain an objective evaluation has not been constructed.
Regarding the use of a communication network for a golf club, the present applicant has provided a golf product selection apparatus in Japanese Patent Application Laid-Open No. 2002-787 regarding the selection of an optimal golf club for a customer. In the apparatus, as shown in FIG. 5, the server 7 receives the golf swing and the hitting result at the time of hitting the customer measured by the golf hitting measuring instrument 6 via the communication network N, and based on the received measurement result. The recommended product suitable for the customer is selected from the golf product information stored in the database of the server 7 and presented to the customer terminal 5.
However, this prior art measures the hit ball when a customer hits using a golf club, measures the resilience performance of the golf club head itself, and transmits the measurement result via a communication network. It is not what you have.

  As described above, the ball collision test machine for measuring the resilience performance of the golf club head is a single machine that is not connected by a communication network. Therefore, the newly developed golf club is evaluated for each single machine. It is necessary to evaluate to. Therefore, in order to standardize the evaluation criteria, the golf club must be brought into the same ball collision tester and tested. As a result, for example, when performing a performance comparison evaluation between a plurality of golf clubs, it is necessary to prepare and measure all of the plurality of golf clubs in one ball collision tester, which is troublesome and time consuming. Even if only the results measured with a different ball crash tester can be obtained, the golf club redesigned based on the results is sent again to the place where the ball crash tester is located and re-evaluated to confirm. This will cause trouble.

In addition, a database having the same golf club evaluation reference information is provided for each ball collision tester, and the measurement result of the golf club measured for each tester is compared with the reference information of the database, so that it is based on the unified standard. It is possible to evaluate golf clubs.
However, when a database is updated, it takes time and effort to update each database individually, and if there is a difference in the degree of update between the databases, the evaluation criteria are not uniform. The performance will be evaluated. In addition, the above-described ball collision tester shown in FIG. 4 has a problem that the measurement results vary greatly and the accuracy is poor.
Japanese Patent Laid-Open No. 2002-787

  The present invention has been made in view of the above problems, and it is an object of the present invention to provide a test method with a small measurement error while enabling easy evaluation of the rebound performance of a golf club.

In order to solve the above problems, the present invention includes a server connected to a terminal device via a communication network,
Receiving means for receiving a measurement result of an arbitrary golf club by a specific model golf club rebound performance testing machine via the communication network;
A database having golf club evaluation standard information based on the measurement result by the golf club rebound performance tester of the specific model;
Arithmetic processing means for comparing and determining the measurement result of the arbitrary golf club received by the receiving means and the golf club evaluation reference information;
There is provided a golf club evaluation system comprising transmission means for transmitting an evaluation result of the arbitrary golf club determined by the arithmetic processing means to a terminal device via the communication network.

As described above, the rebound performance of a golf club is not measured by a single unit consisting of a ball collision tester that causes a ball to collide with a head. In the present invention, a unified specific model golf club rebound performance tester is used. It is measured by. Therefore, even if the tester is installed in a different place, it is a specific type of tester, and therefore the measurement result measured by this tester can be evaluated based on the same evaluation standard.
Therefore, the measurement result of the golf club rebound performance tester of this specific model is received by the server, compared with the golf club evaluation standard information in the database of the server, and the evaluation result is transmitted to each terminal device via the communication network. In this case, the server's database can accumulate repulsion performance evaluation based on a standard unified for many golf clubs, and an objective evaluation based on the unified evaluation standard can be obtained on the terminal device side.

The server is arranged under a manager (for example, an international golf club standard rule manager), and the terminal device connected to the server via a communication network is a golf club of the specific model. It is arranged in a measurer equipped with a resilience performance testing machine, a golf club manufacturing company, a golf course, a golf tournament place, a store, and the like.
For example, if a terminal device is installed at a golf course or golf tournament, it can be determined whether or not the rule is met during the competition. If installed at a store, whether or not the customer conforms to the rule at the time of purchase. This is because it is possible to examine how much potential it is compared with other types of clubs.

For example, even if the golf club resilience performance testing machine and the server are installed in different countries, the server transmits the data to the server via a communication network, and the server quickly analyzes under the same evaluation condition, and the evaluation result is An evaluation result can be obtained quickly on the terminal device side. In addition, anyone who can access the server can know evaluation results such as which golf clubs satisfy the evaluation criteria.
Further, the database having the golf club evaluation standard information is centrally managed by the server, and when the golf club evaluation standard information is changed, only one database needs to be updated. As a result, no difference occurs in the database to be referred to, and the effort for updating the database is reduced.

  The golf club evaluation reference information stored in the database includes rebound performance reference numerical value data of a golf club head measured by a golf club rebound performance tester, and the rebound performance of the golf club head received by the receiving means. , It is configured to be able to compare and analyze whether the reference numerical data is satisfied.

  With the above configuration, for example, when evaluating whether the resilience performance of the developed golf club satisfies the standard numerical data, it is tested with the above-mentioned specific model golf club resilience performance testing machine at or near the development site, and the measurement is performed. If the result is transmitted to the server via the communication network, the evaluation result can be obtained immediately by the terminal device. By feeding this evaluation result back to design and development, the development speed can be increased.

  In the database, the golf club product information including the measurement result of the rebound performance of each golf club received by the receiving means and the head weight of the golf club is stored, and the golf club of the specific model arranged at a plurality of locations. The rebound performance of a plurality of golf clubs measured by a rebound performance tester can be comparatively analyzed.

  With the above configuration, a golf club measured with a golf club rebound performance tester can be easily compared and analyzed with product information such as the rebound performance and weight of another golf club. Therefore, it is not necessary to order another golf club for comparison and the development efficiency is improved.

The golf club rebound performance testing machine of the above specific model is capable of tilting while holding a club gripping portion for positioning and fixing a golf club, a rod-shaped member made of a metal part and having a striking portion at one end, and holding the other end of the rod-shaped member. A tilting means for hanging, and an acceleration sensor attached to the striking part,
With the golf club head face facing the hitting portion, the golf club shaft is fixed to the club gripping portion, and the other end side of the rod-like member supported on the other end side by the tilting means is fixed. Tilt in the form of a pendulum as a fulcrum, causing the hitting portion to collide with the head face surface of the golf club,
Smoothing the time series data of the value that can obtain the acceleration acquired by the acceleration sensor at the time of the collision, and the termination value from the time of the value within the range of 2% to 8% of the termination value of the time series data after the smoothing The rebound performance of the head of the golf club is measured on the assumption that the rebound performance of the head of the golf club is higher as the time to the value in the range of 92% to 98% is longer.

As described above, in the golf club rebound performance testing machine of the present invention, the hit portion is caused to collide with the fixed face surface of the head, and the rebound performance of the head is directly measured.
On the other hand, in the conventional ball collision tester, since the ball collides with the head, the measurement of the rebound performance of the head varies due to variations in ball accuracy and ball collision conditions. Since the club rebound performance tester does not depend on the method of making the ball collide, the variation does not occur and the measurement accuracy can be improved. Furthermore, it is possible to eliminate the need for the measurement using the reference metal plate for correction at the measurement preparation stage, which was necessary in the measurement using the ball collision tester. In addition, the ball impact tester requires a ball launcher and a ball speed measuring machine, but the golf club rebound performance tester of the present invention does not require it, so it becomes an inexpensive and simple structure tester with few machine differences. .
Furthermore, since the golf club resilience performance testing machine does not employ a method of installing a head that is a free-form surface on an installation table, there is no variation due to installation conditions, and measurement accuracy can be further improved.

Alternatively, the golf club rebound performance testing machine of the specific model is fixed at a predetermined position where the golf club head gripping portion that holds the golf club grip and hangs the golf club tiltably and the face surface of the golf club head collide with each other. A hit part made of a metal part, and an acceleration sensor attached to the hit part,
The golf club grip is fixed to the club gripping portion, the entire golf club is tilted in a pendulum shape with the club gripping portion as a fulcrum, and the face surface of the head collides with the hit portion,
The time series data obtained by time integration of the acceleration acquired by the acceleration sensor at the time of the collision is smoothed, and the value within a range of 2% to 8% of the end value of the time series data after the smoothing is processed. The longer the time from the time to the time to reach a value within the range of 92% to 98% of the end value, the higher the rebound performance of the golf club head, the more the rebound performance of the golf club head is measured. Is.

  That is, in this case, contrary to the case described above, the golf club is tilted while the rod-shaped member having the hitting portion to which the acceleration sensor is attached is positioned and fixed. In this case as well, the golf club also grips and fixes the shaft portion without depending on the method of making the ball collide, so that the conventional variation does not occur and the measurement accuracy can be improved. In addition, measurement with a reference metal plate for correction at the measurement preparation stage can be made unnecessary, and the ball launching device and ball speed measuring machine, which were necessary for the ball collision tester, are also unnecessary, and it is inexpensive and simple. It is possible to provide a testing machine having a structure with little machine difference.

In the database, as one of the rebound performance reference numerical data of the golf club head, time series data of values obtained by time integration of acceleration acquired by the acceleration sensor at the time of the collision is smoothed, A specific time is set from the time of the value within the range of 2% to 8% of the end value of the time series data after smoothing to the time of reaching the value within the range of 92% to 98% of the end value.
That is, smoothing processing is performed on time series data of values calculated by time-integrating acceleration acquired by the acceleration sensor at the time of the collision, which represents the resilience performance of the golf club measured by the golf club resilience performance testing machine, The time from the time of the value within the range of 2% to 8% of the end value of the time series data after the smoothing to the time of reaching the value within the range of 92% to 98% of the end value is represented in the database. By making a comparison with the specific time, for example, it is possible to evaluate whether or not the measured golf club is within the rule range.

The start time for calculating the specific time is preferably 3% to 7% of the end value, and more preferably a time within a range of 4% to 6%. This is because if the% value is too small, the error of the measuring instrument itself increases, whereas if it is too large, it is difficult to consider so-called contact time.
The end time for calculating the specific time is preferably 93% to 97% of the end value, and more preferably a time having a value in the range of 94% to 96%. This is because if the% value is too large, the error of the measuring device itself increases, while if it is too small, it is difficult to consider the contact time.
Specifically, the time from the time of 5% of the end value of the time series data obtained by smoothing the value obtained by time integration of the acceleration acquired by the acceleration sensor to the time of 95% of the end value It is most preferable to calculate the time until.

As is clear from the above description, according to the present invention, the measurement result of the specified golf club rebound performance tester of the same model is transmitted to the server, and compared with the golf club evaluation reference information in the database of the server. Since the evaluation result is transmitted to the terminal device, the result measured by the golf club resilience performance tester existing in a different place is always compared based on the same golf club evaluation reference information to obtain the evaluation result. It is possible to unify the evaluation criteria, and anyone anywhere can quickly analyze under the same conditions.

  In addition, since the golf club rebound performance tester used is measured by causing the golf club head and hit part (or hitting part) to collide with the pendulum, measurement by a conventionally used ball collision tester is performed. Compared to, there is less variation in measurement results and measurement results from the testing machine. Therefore, as described above, measurement results using the same model golf club resilience performance testing machine can be evaluated based on a unified evaluation standard.

Embodiments of the present invention will be described with reference to the drawings.
FIG. 1 shows an outline of the golf club evaluation system of the first embodiment, and a server 11, golf club rebound performance testing machines 13-1 to X, and terminal devices 12-1 to X are connected via a communication network N. .
The server 11 includes a database 15 having golf club evaluation reference information, an arithmetic processing unit 16, and a communication unit (including a reception unit and a transmission unit) 17.

  The server 11 is placed under a manager who manages the golf club evaluation standard information in an integrated manner. A plurality of golf club rebound performance testing machines 13-1 to 13-X and terminal devices 12-1 to 12-X are arranged at a golf club manufacturing company. In addition, it goes without saying that the terminal devices 12-1 to X may be arranged at a place different from the golf club resilience performance testing machines 13-1 to X, but the measurement is performed when the terminal device is arranged in the vicinity of the testing machine. The result can be quickly transmitted to the server 11, and the evaluation result from the server 11 can be quickly obtained from the terminal device.

The plurality of golf club resilience performance testing machines 13-1 to 13-X are the same model, and one golf club resilience performance testing machine 13-1 will be described as a representative.
The golf club rebound performance testing machine includes a golf club holder 18 having a leg portion 18a and a rotatable club gripping portion 18b, a metal hitting member 19, and an acceleration attached to the back of the hitting member 19. A sensor 20 and an amplifier 21 connected to the acceleration sensor 20 through a cable are provided. The hit member 19 has a hit surface 19a that collides with the head Gb of the golf club G as a curved surface, and has a fixing portion 19b to the base, and is fixed to the base by the fixing portion 19b.

In the golf club G, the grip Ga is held and fixed to the club gripping portion 18b of the golf club holder 18, and the golf club G is suspended in a pendulum-like manner with the club gripping portion 18b as a fulcrum.
The cable output from the amplifier 21 is connected to the main body 12a of the terminal device 12-1 having communication means and is connected to the communication network N, and the terminal device 12 displays the evaluation result. 12b.

The test method with the golf club rebound performance tester 13-1 is a pendulum test determined by the USGA (National Golf Association), and the golf club G is tilted to a predetermined angle with the club gripping portion 18b as a fulcrum. G is released to make a pendulum state, and the face surface of the club head Gb is made to collide with the hit surface 19a of the hit member 19 fixed. At this time, a time change graph of the speed obtained by time integration of the time series data of the acceleration obtained from the acceleration sensor 20 is shown in FIG. Note that the jagged signal waveform in the graph shown in FIG. 3 is raw data obtained from the acceleration sensor 20, and the data obtained by smoothing the raw data is time-integrated. As the smoothing processing, it is preferable to perform noise removal, filtering, moving average processing, or the like.
The time required to reach 5% of the terminal speed Vm of the speed data in the graph shown in FIG. 3 is defined as t1, and the time required to reach 95% of the terminal speed is defined as t2. The value of t2-t1 is obtained, and the resilience performance is evaluated based on the length of the specific time t2-t1. Specifically, the longer the time t2-t1, the higher the resilience performance.
The details of the pendulum test are described in “Technical Description of the Pendulum Test” attached to “Notice To Manufacturers” issued by USGA on February 24, 2003.

The database 11 of the server 11 includes rebound performance standard numerical data for evaluating whether the rebound performance of the head Gb of the golf club G measured by each golf club rebound performance tester 13-1 to X satisfies a predetermined requirement. Stored as golf club evaluation standard information. For example, the rule range value of the specific time t2-t1 is stored to indicate whether or not the rebound performance of the golf club is within the rule range.
In addition, the database 15 also stores product information such as the measurement result of the rebound performance of the golf club G measured by each golf club rebound performance test machine 13-1 to X and the weight of the golf club G.

Next, an evaluation procedure using the golf club evaluation system will be described.
The rebound performance is measured by the golf club rebound performance tester 12-1. That is, the time-series speed is obtained by time-integrating time-series data of acceleration obtained by tilting the golf club G in a pendulum state with the club gripping portion 18b as a fulcrum and causing the head Gb to collide with the hit member 19 fixed. Data is acquired, and a specific time t2-t1 which is a time from the time when the speed reaches 5% of the terminal speed Vm of the speed data to the time when the speed reaches 95% of the terminal speed is obtained. Then, the measurement result is transmitted to the server 11 via the communication network N. On the server 11 side, the received measurement result is compared with the database 15 by the arithmetic processing means 16, and the resilience performance of the tested golf club G is confirmed. An evaluation result indicating whether or not it is within a predetermined rule range is transmitted to the terminal device 12-1 side and displayed on the display unit 12b of the terminal device 12-1.

  Moreover, depending on the request | requirement of the terminal device 12-1, the measurement result which measured the golf club G measured with the golf club resilience performance testing machine 13-1 with the other golf club resilience performance testing machines 13-2 to X, The evaluation result compared with the already stored golf club product information is also transmitted to the terminal device 12-1 and displayed on the display unit 12b.

With the above configuration, when the measurement is performed by the golf club rebound performance tester of the same model and the measurement result is transmitted from the terminal device to the server 11 via the communication network N, the same database 15 is used and the standard is unified. The rebound performance of the golf club will be evaluated. Therefore, regardless of where in the world, different golf manufacturers, or different types of golf clubs, the evaluation results can be quickly obtained with the same evaluation standard via the communication network N. Can be obtained.
On the other hand, the database 15 having the golf club evaluation standard information is centrally managed by the server 11, and only one database 15 needs to be updated when the golf club evaluation standard information is changed. A difference does not occur in the database 15 referred to by the performance testing machines 13-1 to 13-X, and the trouble of updating the database 15 can be reduced.

Further, when evaluating whether the rebound performance of the developed golf club G satisfies a predetermined requirement, the rebound performance is measured by the golf club rebound performance tester 13-1 at the development site, and the result is stored in the server. 11, the evaluation result can be obtained from the server 11 by the terminal device 12-1 and can be immediately fed back to the design development to improve the development speed.
Further, the golf club G measured by the golf club rebound performance test machine 13-1 is used for the golf club G measured by another golf club test machine 13-2 to X using the database 15, and the rebound performance and weight of another golf club are measured. It is also possible to perform comparative analysis with product information such as

In addition, the golf club rebound performance tester used in the present invention eliminates the variation in the measurement due to the installation state of the head by not using the method of installing the head that is a free curved surface on the installation table, and the shaft is a pendulum type head. The rebound performance is measured by colliding with the fixed hit part. Therefore, the measurement error can be reduced as compared with the case where the conventional head is installed at a predetermined position and the rebound performance of the head is measured using a ball striking tester that causes the ball to collide with the head.
Furthermore, the ball launching device and the ball speed measuring machine, which are necessary for the conventional ball collision tester, are not required, and the equipment is not increased in size and is inexpensive. In addition, measurement using a reference metal plate for correction in the measurement preparation stage can be eliminated.

4A and 4B show a second embodiment.
The difference from the first embodiment is that in the golf club resilience performance testing machines 13-1 ′ to X ′, the golf club G side is positioned and fixed, and the metal hitting portion 33a is tilted. .

  The plurality of golf club resilience performance testing machines 13-1 'to X' are the same model, and one golf club resilience performance testing machine 13-1 'will be described as a representative. The golf club resilience performance testing machine 13-1 ′ is configured to bridge the base portion 30 installed on the ground, the two support portions 31 erected from one side of the base portion 30, and the upper side of the support portion 31. Means 32, metal rod-shaped member 33 having the other end of shaft portion 33b fixed to tilting means 32, and metal striking portion 33a having a curved striking surface 33a-1 provided at the tip of rod-shaped member 33. And an acceleration sensor 20 attached to the rear surface of the striking portion 33a, an amplifier 21 connected to the acceleration sensor 20 through a cable, and a club fixing portion 35 erected from the other side of the base portion 30.

  The club fixing part 35 includes a bet part 35a for placing the shaft Gc of the golf club G, a pressing part 35b for pressing the shaft Gc against the bet part 35a, and a tightening part 35c for raising and lowering the pressing part 35b. . The cable output from the amplifier 21 is connected to the main body 12a of the terminal device 12-1 having communication means and is connected to the communication network N, and the terminal device 12 displays the evaluation result. 12b.

The test method using the golf club rebound performance testing machine 13-1 ′ is to release the rod-shaped member 33 from the state in which the tilting means 32 is used as a fulcrum and the rod-shaped member 33 is tilted to a predetermined angle to form a pendulum. The striking surface 33a-1 of the striking portion 33a is made to collide with the face surface of the head Gb of the golf club G that is fixed.
Similarly to the first embodiment, the time until the speed reaches 5% of the terminal speed Vm of the speed data obtained by time-integrating the time series data of the acceleration obtained from the acceleration sensor 20 at the time of the collision. T2 and the time to reach the speed of 95% of the terminal speed t2, the value of the specific time t2-t1 is obtained, the resilience performance is evaluated by the length of the specific time t2-t1, and the time The longer the t2-t1, the higher the resilience performance.
Since other configurations are the same as those of the first embodiment, description thereof is omitted.

1 is a conceptual diagram of a golf club evaluation system according to a first embodiment of the present invention. It is the schematic of the golf club resilience performance testing machine of 1st Embodiment. It is a graph which shows measurement data. It is the schematic of the golf club resilience performance testing machine of 2nd Embodiment. It is the schematic of the conventional ball collision test machine. It is a conceptual diagram of another conventional golf product selection apparatus.

Explanation of symbols

11 Server 12-1 to X Terminal equipment 13-1 to X Golf club rebound performance test machine 15 Database 16 Arithmetic processing means 17 Communication means 18 Golf club holder 18b Club gripping part 19 Impacted member 20 Acceleration sensor 33 Bar-shaped member 33a Part 35 Club fixing part G Golf club

Claims (7)

A server connected to a terminal device via a communication network,
Receiving means for receiving a measurement result of an arbitrary golf club by a specific model golf club rebound performance testing machine via the communication network;
A database having golf club evaluation standard information based on the measurement result by the golf club rebound performance tester of the specific model;
Arithmetic processing means for comparing and determining the measurement result of the arbitrary golf club received by the receiving means and the golf club evaluation reference information;
A golf club evaluation system comprising: a transmission unit configured to transmit an evaluation result of the arbitrary golf club determined by the arithmetic processing unit to a terminal device via the communication network.   The golf club evaluation reference information stored in the database includes rebound performance reference numerical data of the golf club head measured by the golf club rebound performance tester, and is received by the receiving means. 2. The golf club evaluation system according to claim 1, wherein the repulsion performance of the head satisfies a restitution performance standard numerical data of the head to enable comparative analysis. In the database, the golf club product information including the measurement result of the rebound performance of each golf club received by the receiving means and the head weight of the golf club is stored.
The golf club evaluation according to claim 1 or 2, wherein the rebound performance of a plurality of different types of golf clubs measured by the specific model golf club rebound performance tester disposed at a plurality of locations can be comparatively analyzed. system. The golf club rebound performance testing machine of the above specific model is capable of tilting while holding a club gripping portion for positioning and fixing a golf club, a rod-shaped member made of a metal part and having a striking portion at one end, and holding the other end of the rod-shaped member. A tilting means for hanging, and an acceleration sensor attached to the striking part,
With the golf club head face facing the hitting portion, the golf club shaft is fixed to the club gripping portion, and the other end side of the rod-like member supported on the other end side by the tilting means is fixed. Tilt in the form of a pendulum as a fulcrum, causing the hitting portion to collide with the head face surface of the golf club,
The time series data obtained by time integration of the acceleration acquired by the acceleration sensor at the time of the collision is smoothed, and the value within a range of 2% to 8% of the end value of the time series data after the smoothing is processed. The rebound performance of the golf club head is measured as the rebound performance of the golf club head is higher as the time from the time to the time reaching the value in the range of 92% to 98% of the end value is longer. The golf club evaluation system according to claim 1, wherein the golf club evaluation system is a golf club evaluation system. The golf club rebound performance tester of the specific model includes a club holding portion that holds the golf club grip and hangs the golf club in a tiltable manner, and a metal fixed at a predetermined position where the face surface of the golf club head collides. A hitting portion made of parts, and an acceleration sensor attached to the hitting portion,
The golf club grip is fixed to the club gripping portion, the entire golf club is tilted in a pendulum shape with the club gripping portion as a fulcrum, and the face surface of the head collides with the hit portion,
The time series data obtained by time integration of the acceleration acquired by the acceleration sensor at the time of the collision is smoothed, and the value within a range of 2% to 8% of the end value of the time series data after the smoothing is processed. The longer the time from the time to the time to reach a value within the range of 92% to 98% of the end value, the higher the rebound performance of the golf club head, the more the rebound performance of the golf club head is measured. The golf club evaluation system according to any one of claims 1 to 3, wherein the golf club evaluation system is one.   In the database, as one of the rebound performance reference numerical data of the golf club head, time-series data of values obtained by time integration of the acceleration acquired by the acceleration sensor at the time of the collision and time integration are smoothed. Process and set a specific time from the time of the value within the range of 2% to 8% of the end value of the time series data after the smoothing to the time of reaching the value within the range of 92% to 98% of the end value The golf club evaluation system according to claim 4 or 5, wherein   Calculate the time from the time of 5% of the end value of the time series data obtained by smoothing the value obtained by time integration of the acceleration acquired by the acceleration sensor to the time of reaching 95% of the end value The golf club evaluation system according to any one of claims 4 to 6.

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