Swing practice device using two IMU sensors

Abstract

Disclosed is a swing practice device which is a golf swing practice device and is provided with a cocking-uncocking analysis system which utilizes two inertial measurement unit (IMU) sensors, including a sensor 1 (110), which is installed on a wrist portion to measure the angle of an arm, and a sensor 2 (200), which is installed on a predetermined part of a club to measure the angle of the club, wherein the positions of the arm measured through the sensor 1 (110) are displayed on a scale according to the angle of rotation of the shoulders, and the angle of the arm and the angle of the club are measured for each gradation to show cocking and uncocking positions, thereby analyzing cocking and uncocking situations.

Description

Swing trainer using two IMU sensors

[0001] The present invention relates to a golf swing trainer that provides a cocking-uncocking analysis method for analyzing cocking and uncocking situations by measuring the angle of a golf club and the angle of an arm.

[0002] In general, golf is a game in which players hit a ball stationary on a course with a club and put it into a designated hole, competing based on the number of strokes required to do so. It is a game in which players hit a white ball stationary on a course with a club shaped like a stick and put it into a designated hole, competing based on the number of strokes required to do so.

[0003] Any method can be used to swing a golf club at a ball stationary on the ground, but to accurately determine distance and direction, it is most effective to swing the club along a set path, so the basic principles of the swing are almost standardized.

[0004] Accordingly, many swing trainers have been developed to practice swings.

[0005] Among them, Patent Document 1 below is a device capable of correcting a golfer's swing posture. Patent Document 1 helps players master the correct swing posture by allowing them to practice repeatedly by correcting their posture to maintain a consistent trajectory.

[0006] However, among the swing postures, cocking, which is when the wrist is bent, especially during the backswing, is an important factor in creating the acceleration of the club. If the cocking starts too early or too late, the club shaft is more likely to overswing or the impact will be inaccurate. It is desirable to uncock at a position close to impact.

[0007] Therefore, information on the cocking-uncocking position is required for proper training and swing improvement, but conventional swing practice machines are not only inconvenient for practicing cocking, but many golfers also have difficulty finding an economically accessible method.

[0008] Therefore, a device is required that can make cocking practice economical and easy by analyzing the user's cocking-uncocking situation by analyzing the user's arm angle and club angle.

[0009] The problem of the present invention is to provide a device that can facilitate cocking practice by providing information that separates the arm angle and the club angle and analyzing the user's cocking-uncocking situation through the information.

[0010] In addition, another technical problem to be solved by the present invention is to provide an analysis chart that analyzes the user's cocking-uncocking state economically and efficiently.

[0011] The technical problems that this application seeks to solve are not limited to those described above.

[0012] In order to solve the above technical problem, the present invention measures the angle of the arm and the angle of the club by using a sensor 1 (110) installed near the wrist to measure the angle of the arm and a sensor 2 (130) installed at a certain part of the club to measure the angle of the club, and by measuring the angle of the arm and the angle of the club according to the rotation angle of the shoulder, the positions of cocking and uncocking are expressed, and the situation of cocking and uncocking is analyzed.

[0013] In addition, the above sensor 1 (110) and the above sensor 2 (130) apply an inertial sensor (IMU: Inertial Measurement Unit) to measure the angle of the arm with sensor 1 and the angle of the club with sensor 2, measure the difference angle between the angle of the arm and the angle of the club, confirm the position of the arm through sensor 1, and simultaneously display the angle of the arm, the angle of the club, and the difference angle according to the position of the arm.

[0014] In addition, the above-described cocking-uncocking analysis system provides an analysis chart showing the state of cocking and uncocking, and the analysis chart (300) depicts a circle, and when a point at the bottom of the arc of the circle is referred to as an origin (310), an angle from the origin to a point spaced apart along the arc is expressed to correspond to an arm position angle, and at this time, a scale (350) is displayed spaced apart at the same angle on the circumference of the circle based on the origin, and an arm angle (120) and a club angle (140) are displayed near the scale on the inside or outside of the arc.

[0015] In addition, the above scale (350) is displayed in the radial direction approaching the circumference at regular angles, and when the circle is viewed from the front, the scale displayed at the origin (310) at the bottom is called the origin scale (311), the first left scale in the origin scale is called +1 scale (321), the second left scale is called +2 scale (322), the third left scale is called +3 scale (323), the fourth left scale is called +4 scale (324), the fifth left scale is called +5 scale (325), the sixth left scale is called +6 scale (326), and the first right scale is called -1 scale (331) in the origin scale, the second right scale is called -2 ​​scale (332), the third right scale is called -3 scale (333), the fourth right scale is called -4 scale (334), and the fifth right scale is called -5 notch (335), and the angle of the user's arm and the angle of the club at the address are indicated near the origin.

[0016] In addition, the above-mentioned constant angle is 30 degrees, the +1 scale is displayed at a position moved 30 degrees to the left from the origin scale, the +2 scale is displayed at a position moved 60 degrees to the left from the origin scale, the +3 scale is displayed at a position moved 90 degrees to the left from the origin scale, the +4 scale is displayed at a position moved 120 degrees to the left from the origin scale, the +5 scale is displayed at a position moved 150 degrees to the left from the origin scale, the +6 scale is displayed at a position moved 180 degrees to the left from the origin scale, the -1 scale is displayed at a position moved 30 degrees to the right from the origin scale, the -2 scale is displayed at a position moved 60 degrees to the right from the origin scale, the -3 scale is displayed at a position moved 90 degrees to the right from the origin scale, the -4 scale is displayed at a position moved 120 degrees to the right from the origin scale, and the -5 scale is It is displayed at a position 150 degrees to the right from the origin scale.

[0017] At this time, the arm angle and the club angle are indicated on each of the above scales, but when addressing, the arm angle and the club angle are indicated near the origin scale (311), and when the arm position is 30 degrees to the ground during the backswing or downswing, the arm angle and the club angle are indicated near the +1 scale (321), when the arm position is 60 degrees to the ground during the backswing or downswing, the arm angle and the club angle are indicated near the +2 scale (322), and when the arm position is 90 degrees to the ground during the backswing or downswing, the arm angle and the club angle are indicated near the +3 scale (323).

[0018] Furthermore, if the arm position is 120 degrees to the ground during the backswing or downswing, the arm angle and club angle are indicated near the +4th notch (324). If the arm position is 150 degrees to the ground during the backswing or downswing, the arm angle and club angle are indicated near the +5th notch (325). If the arm position is 180 degrees to the ground during the backswing or downswing, the arm angle and club angle are indicated near the +6th notch (326).

[0019] Additionally, during the backswing (341), the arm angle and club angle are indicated on the inside of the circle, and during the downswing (342), the arm angle and club angle are indicated on the outside of the circle.

[0020] Also, if the arm position during the follow-through swing is at 30 degrees to the ground, the arm angle and club angle are displayed near the -1 notch (331) position, if the arm position during the follow-through swing is at 60 degrees to the ground, the arm angle and club angle are displayed near the -2 notch (332) position, if the arm position during the follow-through swing is at 90 degrees to the ground, the arm angle and club angle are displayed near the -3 notch (333) position, if the arm position during the follow-through swing is at 120 degrees to the ground, the arm angle and club angle are displayed near the -4 notch (334) position, and if the arm position during the follow-through swing is at 150 degrees to the ground, the arm angle and club angle are displayed near the -5 notch (335) position.

[0021] In addition, the above sensor 1 (110) and the above sensor 2 (130) operate in conjunction with each other and communicate with each other wired or wirelessly.

[0022] In addition, the sensor 1 is formed to be mounted on the left arm in the case of a right-handed golfer, and on the right arm in the case of a left-handed golfer, but is mounted at a location on the lower arm that does not interfere with the rotation of the wrist of the arm, and the sensor 2 is installed embedded in the grip portion (132) or shaft (134) of the club or inside the shaft.

[0023] In addition, the cocking-uncocking analysis system includes a control unit (510) that processes and analyzes signals from the sensors 1 and 2 and processes necessary commands, an input unit (520) that can select the type of club, a display unit that displays information to the user, a memory unit (530) that stores the arm position, the arm angle, and the club angle, a calculation unit (540) that calculates the cocking position, which is the cocked arm position, and the uncocking position, which is the uncocked arm position, from the arm angle and the club angle, and an interface unit (550) for linking with a smartphone.

[0024] Additionally, the speed of the club head is displayed along with the angle of the arms and the angle of the club near each of the above scales.

[0025] In addition, in the memory unit (530), the arm position, arm angle, and club angle for each swing are stored after the club user swings the club i times (i=1,2,3,...,n-1,n, where n is a natural number and means the last number of i), and the arm angle and club angle according to the arm position for each number of swings are displayed on the analysis chart (300), and the arm angle and club angle are displayed using the arm link unit (125) showing the arm angle and the club link unit (145) showing the club angle.

[0026] In addition, the arm link part (125) is added with an 11th point (124) which is one end of the arm link part and a 12th point (126) which is the other end of the arm link part, and the club link part (145) is added with a 21st point (144) which is one end of the club link part and a 22nd point (146) which is the other end of the club link part, and the arm link part and the club link part are shown in the analysis chart (300), but when shown in the analysis chart, the 12th point (126) of the arm link part and the 21st point (144) of the club link part are shown close to each other or overlapping each other.

[0027] In addition, after the club user swings the club i times (i=1,2,3,...,n-1,n), the angle between the arm angle and the club angle is calculated through the calculation unit (500) from the arm angle and the club angle obtained for each swing, and the angle between the arm angle and the club angle according to the arm position for each swing is stored in the memory.

[0028] In addition, the angle of the arm position when the above-mentioned club user makes a backswing when the above-mentioned angle becomes 90 degrees is called the cocking start angle, and the angle of the arm position from the cocking start angle to the arm position at the top position is called the cocking section, and the angle of the arm position when the above-mentioned club user makes a downswing when the above-mentioned angle becomes less than 90 degrees is called the uncocking angle, and the above-mentioned analysis chart (300) shows the above-mentioned cocking start angle, the above-mentioned cocking section, and the above-mentioned uncocking angle.

[0029] In addition, the analysis chart depicts the head speed (360, head speed) of the club, and the head speed of the club is characterized by being depicted on the outside of the arc of the analysis chart so as to be related to the uncocking angle.

[0030] In addition, the above analysis chart is characterized in that the head speed of the club is depicted as a speed arc (361) in the shape of an arc on the outside of the circle, the cocking section during the backswing is depicted as a cocking arc (362) in the shape of an arc on the inside of the circle, and the uncocking section during the downswing is depicted as an uncocking arc (363) in the shape of an arc on the outside of the circle.

[0031] According to an embodiment of the present application, it is expected that a swing practice device will be provided that can facilitate cocking practice economically and efficiently by analyzing the user's cocking-uncocking situation by analyzing the arm angle and the club angle.

[0032] In addition, according to the embodiment of the present application, it is expected that there will be provided an analysis chart that allows one to check at a glance the club angle, cocking start angle, cocking section, uncocking angle, and head speed of the arm angle according to the arm position, thereby providing a swing practice device that can facilitate efficient cocking practice.

[0033] Figure 1 is an example diagram showing an analysis chart (300) according to the angle of the arm and the angle of the club according to the present invention.

[0034] Figure 2 is an example diagram showing a scale (350) for each arm position during the backswing, downswing, and follow-through swing in an analysis chart according to the present invention.

[0035] Figure 3 is a drawing explaining the arm link part (125) according to the position of the arm and the club link part (145) according to the position of the club and the difference angle (Q, 127) thereof.

[0036] Figure 4 is a drawing showing the coordinate system when sensor 1 (110) and sensor 2 (130) are each attached.

[0037] Figure 5 is a side view showing the sensor 1 (110) attached to the arm link part (125) and the sensor 2 (130) attached to the club link part (145) being cocked.

[0038] Figure 6 is a drawing showing an example of a trainer to which a sensor according to the present invention is applied.

[0039] Figure 7 is a drawing showing the angle of the arm link part (125) and the club link part (145) and the arc speed (361) of the club head in the analysis chart (300).

[0040] Figure 8 is a drawing showing a cocking arc (362) and an uncocking arc (363) in an analysis chart (300).

[0041] Figure 9 is a flow chart illustrating an example of a measurement and control method according to the present invention.

[0042] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings. However, the technical concept of the present invention is not limited to the embodiments described herein and may be embodied in other forms. Rather, the embodiments introduced herein are provided to ensure that the disclosed content is thorough and complete and to sufficiently convey the spirit of the present invention to those skilled in the art.

[0043] In this specification, when a component is referred to as being on another component, it means that it can be formed directly on the other component, or a third component may be interposed between them. In addition, in the drawings, the thicknesses of films and regions are exaggerated for the purpose of effectively explaining the technical contents.

[0044] Also, although terms such as first, second, and third have been used to describe various components in various embodiments of this specification, these components should not be limited by these terms. These terms are only used to distinguish one component from another. Thus, what is referred to as a first component in one embodiment may be referred to as a second component in another embodiment. Each embodiment described and illustrated herein also includes its complementary embodiments. Also, the term "and / or" has been used herein to mean including at least one of the components listed before and after.

[0045] In the specification, singular expressions include plural expressions unless the context clearly dictates otherwise. Furthermore, terms such as "comprises" or "has" are intended to specify the presence of a feature, number, step, component, or combination thereof described in the specification, but should not be construed as excluding the presence or addition of one or more other features, numbers, steps, components, or combinations thereof.

[0046] In addition, when describing the present invention below, if it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the gist of the present invention, the detailed description will be omitted.

[0047] As shown in Fig. 1, the cocking-uncocking analysis system of the present invention is characterized by providing an analysis chart (300) by measuring the angle of the golf club and the angle of the arm, thereby allowing the cocking and uncocking states to be viewed at a glance.

[0048] Fig. 2 shows the basic form of an analysis chart. In the analysis chart (300), a circle is depicted, and when a point at the bottom of the arc of the circle is referred to as the origin (310), the angle from the origin to a point spaced apart along the arc is expressed to correspond to the position angle of the arm. At this time, a plurality of graduations (350) are displayed spaced apart at the same angle on the circumference of the circle based on the origin. At this time, it is preferable to display the arm angle and the club angle on each graduation (350) inside the arc of the analysis chart (300) during the backswing, and outside the arc of the analysis chart during the downswing and follow-through.

[0049] In some cases, it may be shown inside the arc during the downswing and outside the arc during the backswing.

[0050] Here, the scale (350) is displayed in the radial direction at a certain angle close to the circumference as shown in Fig. 2, and when the circle is viewed from the front, the scale displayed at the origin (310) at the bottom is called the origin scale (311), the first left scale in the origin scale is called +1 scale (321), the second left scale is called +2 scale (322), the third left scale is called +3 scale (323), the fourth left scale is called +4 scale (324), the fifth left scale is called +5 scale (325), the sixth left scale is called +6 scale (326), and the first right scale is called -1 scale (331) in the origin scale, the second right scale is called -2 ​​scale (332), the third right scale is called -3 scale (333), the fourth right scale is called -4 scale (334), and the fifth right scale is called -5 notch (335), and the angle of the user's arm and the angle of the club at the address are indicated near the origin.

[0051] Here, if the above-mentioned constant angle is 30 degrees, the +1 scale is displayed at a position moved 30 degrees to the left from the origin scale, the +2 scale is displayed at a position moved 60 degrees to the left from the origin scale, the +3 scale is displayed at a position moved 90 degrees to the left from the origin scale, the +4 scale is displayed at a position moved 120 degrees to the left from the origin scale, the +5 scale is displayed at a position moved 150 degrees to the left from the origin scale, the +6 scale is displayed at a position moved 180 degrees to the left from the origin scale, the -1 scale is displayed at a position moved 30 degrees to the right from the origin scale, the -2 scale is displayed at a position moved 60 degrees to the right from the origin scale, the -3 scale is displayed at a position moved 90 degrees to the right from the origin scale, the -4 scale is displayed at a position moved 120 degrees to the right from the origin scale, and the -5 scale is It is displayed at a position 150 degrees to the right from the origin scale.

[0052] At this time, the arm angle and the club angle are indicated on each of the above scales, but when addressing, the arm angle and the club angle are indicated near the origin scale (311), and when the arm position is 30 degrees to the ground during the backswing or downswing, the arm angle and the club angle are indicated near the +1 scale (321), when the arm position is 60 degrees to the ground during the backswing or downswing, the arm angle and the club angle are indicated near the +2 scale (322), and when the arm position is 90 degrees to the ground during the backswing or downswing, the arm angle and the club angle are indicated near the +3 scale (323).

[0053] Furthermore, if the arm position is 120 degrees to the ground during the backswing or downswing, the arm angle and club angle are indicated near the +4th notch (324). If the arm position is 150 degrees to the ground during the backswing or downswing, the arm angle and club angle are indicated near the +5th notch (325). If the arm position is 180 degrees to the ground during the backswing or downswing, the arm angle and club angle are indicated near the +6th notch (326).

[0054] In addition, during the backswing (341), the arm angle and club angle are indicated on the inside of the circle, and during the downswing (342), the arm angle and club angle are indicated on the outside of the circle.

[0055] Also, if the arm position during the follow-through swing is at 30 degrees to the ground, the arm angle and the club angle are displayed near the -1 notch (331) position, if the arm position during the follow-through swing is at 60 degrees to the ground, the arm angle and the club angle are displayed near the -2 notch (332) position, if the arm position during the follow-through swing is at 90 degrees to the ground, the arm angle and the club angle are displayed near the -3 notch (333) position, if the arm position during the follow-through swing is at 120 degrees to the ground, the arm angle and the club angle are displayed near the -4 notch (334) position, and if the arm position during the follow-through swing is at 150 degrees to the ground, the arm angle and the club angle are displayed near the -5 notch (335) position.

[0056] And as seen in FIGS. 3 and 7, the arm angle (120) and club angle (140) according to the arm position are displayed near the scale on the inside or outside of the arc of the analysis chart (300), and the arm angle and club angle are displayed using the arm link part (125) showing the arm angle and the club link part (145) showing the club angle.

[0057] As shown in FIG. 3, the arm link portion (125) is provided with an 11th point (124) which is one end of the arm link portion and a 12th point (126) which is the other end of the arm link portion, and the club link portion (145) is provided with a 21st point (144) which is one end of the club link portion and a 22nd point (146) which is the other end of the club link portion, and the arm link portion and the club link portion are shown in the analysis chart (300), but when shown in the analysis chart, the 12th point (126) of the arm link portion and the 21st point (144) of the club link portion are shown to be close to or overlap each other.

[0058] In particular, Fig. 3 is a conceptual diagram for measuring the cocking and uncocking positions, the rotational speed of the arm, and the rotational speed of the club. For the purpose of explanation, Fig. 3 uses two links as a two-dimensional model, and the modeling of the golf swing with two links refers to the method of TP Jorgensen (The Physics of GOLF, 1999, Springer). Here, the arm link part (125) represents a human arm, and the club link part (145) represents a club. In addition, the hinge part connecting the 12th point (126) of the arm link part and the 21st point (144) of the club link part is formed by the wrist.

[0059] In FIG. 3 of the present invention, (a) shows the takeaway in which the arm link part (125) and the club link part (145) move together as one during the initial backswing, that is, the arm and the club move together as one. In FIG. 3, (b) shows the moment (t=k) in which the movement of the club link part (145) is separated from the arm link part (125). This position can be seen as the part where the wrist movement starts, and this part can be seen as the point where the wrist cocking starts. For this purpose, the club link part (145) rotates at a speed ( ) and rotational energy must be applied for this purpose. Meanwhile, as shown in Fig. 3(c), the angular velocity value measured by the sensor 2 (130) mounted on the club link part (145) , and the angular velocity value measured by sensor 1 (110) Then, the following relationship is established.

[0060] ...(1)

[0061] .....(2)

[0062] That is, the rotation speed value in the club link part (145) is the sum of the rotation speeds of the arm link part (125) and the club link part (145). ) is measured.

[0063] The difference between equations (1) and (2) above is as follows.

[0064] ......(3)

[0065] That is, it can be seen that the difference in the measured values ​​of the angular velocities of the two sensors is equal to the difference in the angular velocities of the club link unit (145). In other words, when the arm link unit (125) and the club link unit (145) move together and there is no movement of the club link unit (145), there is no difference in the measured values ​​measured by the arm link unit (125) and the club link unit (145), and at this time, the values ​​of the angular velocities measured by the two sensors , and the value of equation (2) becomes '0'.

[0066] The starting point for wrist release during the downswing can also be found using the same method as above.

[0067] It can be seen that the rotation of the club link part (145) (club) begins when a difference occurs in the values ​​measured by the sensor.

[0068] Here, at the point where the movement of the club link part (145) begins, the rotation speed of the club link part (145) is added to the rotation speed of the arm link part (125), and a difference begins to occur between the two sensors.

[0069] Since the inertial sensor is a sensor that can measure angles in three dimensions, a detailed explanation of measuring the angle of the arm and the angle of the club through the inertial sensors (IMU: Inertial Measurement Unit), which are Sensor 1 and Sensor 2, is omitted.

[0070] In addition, as shown in FIGS. 3 to 5, the sensor 1 (110) and the sensor 2 (130) apply an inertial sensor (IMU: Inertial Measurement Unit) to measure the angle of the arm with sensor 1 (110), measure the angle of the club with sensor 2 (130), measure the angle (Q, 127) between the angle of the arm and the angle of the club, confirm the position of the arm through sensor 1 (110), and simultaneously display the angle of the arm, the angle of the club, and the angle (Q, 127) between the angle of the arm and the angle of the club according to the position of the arm.

[0071] That is, through this, the present invention measures the angle of the arm and the angle of the club by utilizing sensor 1 (110) installed near the wrist to measure the angle of the arm and sensor 2 (130) installed at a specific part of the club to measure the angle of the club, and measures the angle of the arm and the angle of the club by the rotation angle of the shoulder (by the position of the arm) to express the position of cocking and uncocking, thereby analyzing the situation of cocking and uncocking.

[0072] At this time, the above sensor 1 (110) and the above sensor 2 (130) operate in conjunction with each other, and can be implemented in a wired manner as shown in Fig. 6, or can be connected wirelessly.

[0073] In addition, the sensor 1 is formed to be mounted on the left arm in the case of a right-handed golfer, and on the right arm in the case of a left-handed golfer, but is mounted at a location on the lower arm that does not interfere with the rotation of the wrist of the arm, and the sensor 2 can be installed by being embedded in the grip portion (132) or shaft (134) of the club or inside the shaft.

[0074] Furthermore, FIGS. 4 and 5 show the coordinate systems of two sensors as an example of an embodiment of the present invention. That is, the target direction is the y-axis, the forward direction of the golfer in the address posture is the x-axis, and the remaining z-axis is selected by the right-hand rule.

[0075] For convenience of explanation, sensor 1 (110) The axis is the x-axis of the reference coordinate system ( ) was set to match. In addition, the club sensor 2 (130) mounted on the grip end of the club is set to match the y-axis of the club sensor ( ) is the y-axis of the reference coordinate system ( ) is set to match.

[0076] In the present invention, the starting time for the address posture is ) and the xz plane of the club was made to coincide with the xz plane of the reference coordinate system.

[0077]

[0078] The Euler angle of the arm corresponding to the time (t=k) when the relative motion of the arm and the club begins is ) and the Euler angles of the club ( ) contains angle information. Using this value, we can recognize the position of the arm at which the wrist locking starts in the backswing and the wrist release starts in the downswing.

[0079] Additionally, as shown in FIGS. 7 and 8, the speed of the club head can be displayed together with the angle of the arm and the angle of the club near each of the above scales.

[0080] The technique for obtaining the speed of the club head here is described in various documents, so a detailed description thereof is omitted in the present invention.

[0081] In particular, as shown in FIG. 8, when the angle between the arm angle and the club angle examined in FIG. 3 during the backswing, which is the difference angle (Q, 127), exceeds 90 degrees, the angle of the arm position is called the cocking start angle, and the angle between the cocking start angle and the arm position angle at the top position is called the cocking section, and when the club user's angle becomes 90 degrees or more during the downswing, the angle of the arm position is called the uncocking angle, and the analysis chart (300) shows the cocking start angle, the cocking section, and the uncocking angle, respectively.

[0082] Here, the above 90 degrees may vary slightly depending on the person.

[0083] In addition, as shown in FIG. 8, the analysis chart shows the head speed of the club, and the head speed of the club is characterized by showing a speed arc (361) outside the arc of the analysis chart so that it is related to the uncocking angle.

[0084] At this time, it is preferable that the cocking section during the backswing is depicted as an arc-shaped cocking arc (362) on the inside of the circle, and the uncocking section during the downswing is depicted as an arc-shaped uncocking arc (363) on the outside of the circle. The cocking start angle, cocking section, and uncocking angle can be represented in separate colors on the inside and outside of the arc, as shown in Fig. 8.

[0085] As illustrated in FIG. 9, the cocking-uncocking analysis system includes a control unit (510) that processes and analyzes signals from the sensors 1 and 2 and processes necessary commands, an input unit (520) that can select the type of club, a display unit that displays information to the user, a memory unit (530) that stores the arm position, the arm angle, and the club angle, a calculation unit (540) that calculates the cocking position, which is the cocked arm position, and the uncocking position, which is the uncocked arm position, from the arm angle and the club angle, and an interface unit (550) for linking with a smartphone.

[0086] In the memory unit (530), the arm position, arm angle, and club angle for each swing are stored after the club user swings the club i times (i=1,2,3,...,n-1,n), and the arm angle and club angle according to the arm position for each number of swings are displayed on the analysis chart (300). In the memory unit (530), the angle (Q, 127) between the arm angle and the club angle is calculated from the arm angle and club angle for each swing obtained after the club user swings the club i times (i=1,2,3,...,n-1,n), and the angle between the arm angle and the club angle for each swing is stored in the memory unit (530).

[0087] In this way, by collecting the average value and standard deviation, etc. repeatedly obtained through the present invention, information on consistency, which is important in golf, can be individually provided on the screen.

[0088] Furthermore, by presenting baseline data for professional golf and single-player golf, comparisons can be made to motivate training and provide goals, thereby enhancing training effectiveness. Experimental data shows that professional golfers typically release their wrists near impact, while beginners release their wrists early in the downswing. Therefore, this cocking-uncocking analysis system can help individuals embody a desirable swing.

[0089] While the present invention has been described in detail using preferred embodiments, the scope of the present invention is not limited to the specific embodiments described above, and should be construed in accordance with the appended claims. Furthermore, those skilled in the art will appreciate that numerous modifications and variations are possible without departing from the scope of the present invention.

[0090]

[0091] [Explanation of symbols]

[0092]

[0093]

[0094] 90: Club 110: Sensor 1

[0095] 120: Arm angle 124: 11th point

[0096] 125: Arm link 126: 12th point

[0097] 127: Interval 130: Sensor 2

[0098] 140: Club angle 144: 21st point

[0099] 145: Club Link 146: 22nd point

[0100] 300: Analysis chart 310: Origin

[0101] 311: Origin scale 321: +1 scale

[0102] 322: +2 ticks 323: +3 ticks

[0103] 324: +4 ticks 325: +5 ticks

[0104] 326: +6 ticks 331: -1 tick

[0105] 332: -2 ticks 333: -3 ticks

[0106] 334: -4 ticks 335: -5 ticks

[0107] 341: Backswing 342: Downswing

[0108] 350: Scale 360: Club head speed

[0109] 361: Speed ​​arc 362: Cocking arc

[0110] 363: Uncocking arc 510: Control unit

[0111] 520: Input section 530: Memory section

[0112] 540: Operation section 550: Interface section

Claims

1. The angle of the arm and the angle of the club are measured by using sensor 1 (110) installed near the wrist to measure the angle of the arm and sensor 2 (130) installed at a certain part of the club to measure the angle of the club. A cocking-uncocking analysis system that measures the angle of the arm and the angle of the club (90) according to the rotation angle of the shoulder to express the cocking and uncocking positions and analyze the cocking and uncocking situations.

2. In paragraph 1 The above sensor 1 (110) and the sensor 2 (130) are characterized by applying an inertial sensor (IMU: Inertial Measurement Unit) to measure the angle of the arm with sensor 1, measure the angle of the club with sensor 2, measure the difference angle between the angle of the arm and the angle of the club, confirm the position of the arm through sensor 1, and simultaneously display the angle of the arm, the angle of the club, and the difference angle according to the position of the arm.

3. In paragraph 2 The above cocking-uncocking analysis system provides an analysis chart showing the state of cocking and uncocking, and the analysis chart (300) shows a circle, and when the lower point of the arc of the circle is referred to as the origin (310), the angle from the origin to a point spaced along the arc is expressed to correspond to the position angle of the arm. At this time, a cocking-uncocking analysis system characterized in that a scale (350) is marked so as to be spaced at the same angle on the circumference of the circle based on the origin, and an arm angle (120) and a club angle (140) are marked near the scale on the inside or outside of the arc.

4. In paragraph 3 The above scale (350) is displayed in the radial direction at a certain angle close to the circumference, and when the circle is viewed from the front, the scale displayed at the origin (310) at the bottom is called the origin scale (311). In the above origin scale, the first left scale is called +1 scale (321), the second left scale is called +2 scale (322), the third left scale is called +3 scale (323), the fourth left scale is called +4 scale (324), the fifth left scale is called +5 scale (325), and the sixth left scale is called +6 scale (326). In the above origin scale, the first right scale is -1 scale (331), the second right scale is -2 scale (332), the third right scale is -3 scale (333), the fourth right scale is -4 scale (334), and the fifth right scale is -5 scale (335). A cocking-uncocking analysis system characterized in that the angle of the user's arm and the angle of the club are displayed near the origin scale when the user addresses the ball.

5. In paragraph 4 The above-mentioned constant angle is 30 degrees, the +1 scale is displayed at a position 30 degrees moved to the left from the origin scale, the +2 scale is displayed at a position 60 degrees moved to the left from the origin scale, the +3 scale is displayed at a position 90 degrees moved to the left from the origin scale, the +4 scale is displayed at a position 120 degrees moved to the left from the origin scale, the +5 scale is displayed at a position 150 degrees moved to the left from the origin scale, and the +6 scale is displayed at a position 180 degrees moved to the left from the origin scale. The above -1 scale is displayed at a position shifted 30 degrees to the right from the origin scale, the above -2 scale is displayed at a position shifted 60 degrees to the right from the origin scale, the above -3 scale is displayed at a position shifted 90 degrees to the right from the origin scale, the above -4 scale is displayed at a position shifted 120 degrees to the right from the origin scale, and the above -5 scale is displayed at a position shifted 150 degrees to the right from the origin scale. Each of the above scales indicates the angle of the arms and the angle of the club. When addressing, the arm angle and club angle are displayed near the origin mark (311). If the arm position is 30 degrees to the ground during the backswing or downswing, the arm angle and the club angle are indicated near the +1 mark (321). If the arm position is 60 degrees to the ground during the backswing or downswing, mark the arm angle and the club angle near the +2 mark (322). If the arm position is 90 degrees to the ground during the backswing or downswing, the arm angle and the club angle are indicated near the +3 mark (323). If the arm position is 120 degrees to the ground during the backswing or downswing, mark the arm angle and the club angle near the +4 mark (324). If the arm position is 150 degrees to the ground during the backswing or downswing, the arm angle and the club angle are indicated near the +5 mark (325). A cocking-uncocking analysis system characterized by displaying the arm angle and club angle near the +6 mark (326) when the arm position is 180 degrees to the ground during the backswing or downswing.

6. In paragraph 5 A cocking-uncocking analysis system characterized in that the arm angle and club angle are displayed on the inside of the circle during the backswing (341), and the arm angle and club angle are displayed on the outside of the circle during the downswing (342).

7. In paragraph 5 If the arm position is 30 degrees to the ground during the follow-through swing, mark the arm angle and the club angle near the -1 mark (331). When the arm position is 60 degrees to the ground during the follow-through swing, the arm angle and the club angle are displayed near the -2 mark (332). If the arm position is 90 degrees to the ground during the follow-through swing, mark the arm angle and the club angle near the -3 mark (333). When the arm position is 120 degrees to the ground during the follow-through swing, the arm angle and the club angle are displayed near the -4 mark (334). A cocking-uncocking analysis system characterized by displaying the arm angle and club angle near the -5 mark (335) when the arm position is 150 degrees to the ground during the follow-through swing.

8. In paragraph 2 A coking-uncoking analysis system characterized in that the above sensor 1 (110) and the above sensor 2 (130) operate in conjunction with each other and communicate with each other by wire or wirelessly.

9. In paragraph 8 The above sensor 1 (110) is formed to be mounted on the left arm in the case of a right-handed golfer, and on the right arm in the case of a left-handed golfer, but is mounted in a position on the lower arm that does not interfere with the rotation of the wrist of the arm, and the sensor 2 (130) is characterized in that it is installed by being embedded in the grip part of the club, the shaft, or the inside of the shaft.

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