TWI399232B - The measuring method for the second moment of golf club - Google Patents

Description

Method for measuring the second moment of a golf club

The invention is a method for measuring the second moment of a golf club, and the sensing module measures the swing period to determine the parameters such as the primary moment and the second moment of the golf club.

According to the design of the golf club, it becomes more and more complicated with the requirements of the quality of the swinging ball. However, the main factors affecting the quality of the club are quite many. The main parameters of the dynamic performance of the club are: the quality of the club, the first moment (the First moment) and the second moment, the current domestic related analysis equipment, such as the "dynamic balance measurement method for golf clubs" of the Republic of China Patent No. I221423, which comprises the following steps: fixing a club One end; measuring the elastic restoring force of the plurality of orientations of the other end of the club; comparing the minimum elastic recovery force difference of each relative orientation of the club; and the vertical direction of the two orientations of the club with minimum elastic recovery force difference Think of the direction of the club's shot.

However, the above-mentioned analytical instrument for swing dynamic data only stays in the measurement of a single characteristic, and cannot accurately determine the parameters such as the mass, primary moment, and second moment of the golf club, so that the player can tailor the club. And its structure is complex, so the measurement method, but there are still shortcomings of lack of accuracy, so it is still not ideal in use.

Accordingly, the present invention is based on various deletions of conventional measurement methods. A method for measuring the second moment of a golf club is provided, which measures the mass of the club, the primary moment and the second moment simultaneously, and can be connected with the analysis software, and the optimal set rod parameters can be obtained through analysis, which can help the set rod The teacher accurately and appropriately customizes a professional club for the player.

The invention is a method for measuring the second moment of a golf club, comprising the following steps: A. determining the mass of the golf club and the first moment I ₁ : measuring the mass M of the golf club and the golf club grip to The center of gravity distance l _{cg is} multiplied to find the first moment I ₁ of the golf club; B. the golf club performs a single pendulum motion to measure the swing period T; C. find the second moment of the golf club I ₂ : Substituting the obtained I ₁ and T into the equation The second moment I _{2 of} the golf club is obtained; the measured data is transmitted to an integrated software consolidation analysis.

The mass, primary moment and second moment data of the golf club are received or processed via a processing terminal and transmitted to a display terminal.

The above measures the club vibration frequency, the club material, the ball angle and the club core position as input factors.

The advantages of the invention are as follows:

1. The invention establishes a precise, correct and effective test system by simultaneously measuring the mass, the first moment and the second moment of the sensor module and the clamping unit, and the overall structure is simpler.

2. The invention compares the measured mass, first moment, second moment and other related data of the golf club with other integrated golf club data, including the club vibration frequency, the club material, the ball angle, The position of the club's spine and so on as an input factor will help the team member to accurately and appropriately customize the professional club for the player.

3. The present invention provides a simpler measurement method with less computational conditions, is more conducive to measurement of the object to be tested, and can provide more accurate measurement results.

4. In terms of economic considerations or teaching needs, the present invention can correctly and quickly provide professional information about the clubs of the industry, the public, players and students.

An embodiment of the present invention, as shown in the first figure, is a device for measuring a second moment of a golf club, comprising: a support frame (1), which is telescopic, and a base (11) is disposed under the frame. The upper seat is provided with a seat (12), and the upper seat is extended with a hanging portion (13), and the hanging portion (13) is further embedded with a weight sensing element (14).

The sensing module (2) is disposed on the base (11) and is a fiber sensing type, including a processing end (21), a detecting end (22), an input end (23), and a display end (24) The processing end (21) is used for transmitting and receiving signals and is processed. The detecting end (22) is electrically connected to the processing end (21), and the optical fiber is used for signal extraction to sense the swing period of the object to be tested. The input end (23) is electrically connected to the processing end (21) for inputting relevant parameters of the club, such as the vibration frequency of the club, the material of the club, the angle of the ball head, the position of the center of gravity of the club, etc., the display end ( 24) is one In the liquid crystal display screen, the signal of the detecting end (22) and the input end (23) is transmitted to the processing end (21) for data processing, and then displayed by the display end (24).

The clamping unit (3) has a clamping portion (31) and a holding member (32) connected to the clamping portion (31), wherein the clamping portion (31) is convexly provided with a clamping axis ( 33) is for holding the grip portion (A1) of the club to be tested, and the hanging member (32) is disposed corresponding to the hanging portion (13).

In use, as shown in the second figure, the method of measuring the second moment of the golf club is carried out, and is implemented with reference to the apparatus operation diagram of the third figure, including the following steps:

A. Finding the mass M of the golf club and the first moment l ₁ : clamping the golf club (A) with the clamping portion (31) of the clamping unit (3), and hanging with the hanging member (32) Holding the hanging portion (13) of the upper seat (12), the mass M of the golf club (A) is measured by the weight sensing element (14) embedded in the hanging portion (13), and the measured signal is transmitted to the processing end. (21), and by the sensing module (2) of the input terminal (23) inputs the known golf club (A) the grip portion (A1) to the center of gravity _CG of the distance L, M multiplied by the l _cg, by The processing end (21) of the sensing module calculates the first moment I ₁ of the golf club (A).

The first factor affecting the dynamic performance of the swing is the mass M of the golf club (A), which includes the quality of the ball head (A3) and the mass of the shaft (A2). This parameter has a great relationship with the hitting distance. For example, the third iron is 40 inches with a 225 gram ball head (A3). With a distance of 210 yards, each player can adjust the length of the most suitable shaft (A2) according to the height and select the appropriate weight ratio of the ball head (A3) to predict the approximate hitting distance. Of course, this method can also increase the distance between hitting or kicking, thereby increasing the chance of the ball falling on the green.

The second factor affecting the dynamic performance of the swing is the moment I ₁ , defined as follows: I ₁ = M × l _cg

It can be seen from the above formula that the primary moment is related to the mass of the golf club (A) and the position of its center of gravity. The larger M or the larger the l _cg will increase the I ₁ , according to the USGA (American Golf Association) long-term PGA professional golf player The survey shows that the use of a large ball head (A2) will maximize the flight distance and have a better stable flight direction. Therefore, a larger primary moment means that the golf club (A) hits the ball with higher stability.

B. Performing a single pendulum motion of the golf club to measure its swing period T: adjusting the height of the support frame (1) to be greater than the length of the golf club (A), and making the golf club (A) The grip portion (A1) is clamped by the clamping unit (3), and is hung on the hanging portion (13) by the hanging member (32), and the pendulum movement is generated, and the self-clamping axis (33) The downwardly extending working pendulum area falls within the sensing range of the sensing module (2), so when the golf club (A) swings, the ball head (A3) will cover the sensing module back and forth ( 2), the detecting end (22) detects its period T, and the detecting end (22) transmits to the processing end (21).

C. Find the second moment l _{2 of} the golf club: the processing end (21) of the sensing module (2) uses the obtained I ₁ and T into the equation The second moment I _{2 of} the golf club (A) is obtained, and the processing end (21) can transmit the data of the mass, the primary moment and the second moment of the golf club (A) received or calculated to the display end. (24) Display.

The second moment of the golf club (A) is the third parameter that affects the swing dynamics, which is called the moment of inertia in terms of dynamics, as follows: To measure the value of the second moment, the golf club (A) can be considered as a single pendulum motion, and the motion cycle of the pendulum is: In the above formula, g is the acceleration of gravity. Therefore, if the swing period T and the first moment I _{1 of the} energy measurement golf club (A) can determine the magnitude of the second moment I ₂ , the following equation: The second moment can be compared to "distortion resistance". When the I ₂ value of the golf club (A) is higher, the distortion and rotation phenomenon are less likely to occur in the non-center shot, which means the golf club (A) ) The torsion resistance is also high. Just as a fancy skater wants to spin faster, her arms will be closer to the body. This allows the weight to be closer to the body, lowering her I ₂ value. If she wants to slow down, she will extend her arms and move her weight away from the center of her body. This increases its I ₂ value and slows down the rotation speed. The application of the second moment is divided into the difference between the single club and the whole club. For a single club, the emphasis is on the easy-to-play, take-off angle and air time, and the higher I. _{The 2-} value wooden pole allows the player to play better, easier to take off, and longer flight time. For the whole set of clubs, if the second moment is applied by irons, the application of the second moment is somewhat different. In addition to the above characteristics, it is more important to maintain a consistent sense of hitting and make each club feel like a swipe. It is the same, so when adjusting the second moment, it will measure the I ₂ value of the number that the player thinks is the most convenient, and then copy the second moment of the other clubs so that the other clubs have the same second moment. .

In addition, the performance on the green is often the key to determining the outcome, while the putter with a higher I ₂ value means that the stability is higher, so it is quite difficult for the player to maintain the stability of the shot without causing a miss. important.

The embodiment of the invention provides a simpler measuring method with less calculation conditions, is more favorable for the golf club (A) to measure, can provide higher precision measurement results, and the measurement result is transmitted to an integrated software. Convergence analysis, the measured data and other data including the club vibration frequency, the club material, the ball head angle, the club core position as the input factor, after analysis, the best group parameters can be obtained. The establishment of this system will help the team members to accurately and appropriately customize the professional clubs for the players, which not only enhances the quality of the products, but also allows the players to feel the difference after the club is adjusted, thereby enhancing The added value of the product, and in terms of economic considerations or teaching needs, can also provide professional information about the club, industry, people, players and students in the correct and fast.

The device of the embodiment has a simple structure, and the support frame (1) can reduce the volume in addition to high strength and light material structure, so that the utility model has the advantages of being lightweight and convenient to carry.

(1)‧‧‧Support frame

(11)‧‧‧Base

(12) ‧‧‧上上

(13)‧‧‧ Hanging Department

(14)‧‧‧ Weight sensing components

(2) ‧‧‧Sensing module

(21) ‧‧‧Processing end

(22)‧‧‧Detecting end

(23)‧‧‧ Input

(24)‧‧‧ Display

(3)‧‧‧Clamping unit

(31)‧‧‧Clamping Department

(32)‧‧‧Hanging parts

(33)‧‧‧Clamping the shaft

(A) ‧ ‧ golf clubs

(A1) ‧‧‧ grip

(A2) ‧‧‧ shaft

(A3) ‧ ‧ ball head

The first figure is a configuration diagram of the apparatus of the first embodiment of the present invention.

The second figure is a flow chart of the method of the second embodiment of the present invention.

The third figure is a schematic diagram of the operation of the present invention.

(1)‧‧‧Support frame

(11)‧‧‧Base

(12) ‧‧‧上上

(13)‧‧‧ Hanging Department

(14)‧‧‧ Weight sensing components

(2) ‧‧‧Sensing module

(21) ‧‧‧Processing end

(22)‧‧‧Detecting end

(23)‧‧‧ Input

(24)‧‧‧ Display

(3)‧‧‧Clamping unit

(31)‧‧‧Clamping Department

(32)‧‧‧Hanging parts

(33)‧‧‧Clamping the shaft

Claims (1)

A method for measuring a second moment of a golf club, comprising the steps of: A. determining the mass of the golf club and the first moment I ₁ : measuring the mass M of the golf club and the golf club grip to its center of gravity The distance l _{cg is} multiplied to find the first moment I ₁ of the golf club; B. the golf club performs a single pendulum motion to measure its swing period T; C. Find the second moment I _{2 of} the golf club: Substituting the obtained I ₁ and T into the equation Obtaining a second moment I ₂ of the golf club; the quality, primary moment and second moment data of the golf club are received or calculated by a processing terminal and transmitted to a display end, and the measured data is transmitted to a Integrated software integration analysis, using the measured relevant data and the club vibration frequency, club material, ball head angle, club cadence position as input factors, after analysis, the best group parameters can be obtained.