CN105999677B - Portable golf simulation system capable of being networked and simulation method - Google Patents
Portable golf simulation system capable of being networked and simulation method Download PDFInfo
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- CN105999677B CN105999677B CN201610331379.3A CN201610331379A CN105999677B CN 105999677 B CN105999677 B CN 105999677B CN 201610331379 A CN201610331379 A CN 201610331379A CN 105999677 B CN105999677 B CN 105999677B
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- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B69/00—Training appliances or apparatus for special sports
- A63B69/36—Training appliances or apparatus for special sports for golf
- A63B69/3658—Means associated with the ball for indicating or measuring, e.g. speed, direction
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- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B24/00—Electric or electronic controls for exercising apparatus of preceding groups; Controlling or monitoring of exercises, sportive games, training or athletic performances
- A63B24/0003—Analysing the course of a movement or motion sequences during an exercise or trainings sequence, e.g. swing for golf or tennis
- A63B24/0006—Computerised comparison for qualitative assessment of motion sequences or the course of a movement
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- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B24/00—Electric or electronic controls for exercising apparatus of preceding groups; Controlling or monitoring of exercises, sportive games, training or athletic performances
- A63B24/0021—Tracking a path or terminating locations
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- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B71/00—Games or sports accessories not covered in groups A63B1/00 - A63B69/00
- A63B71/06—Indicating or scoring devices for games or players, or for other sports activities
- A63B71/0619—Displays, user interfaces and indicating devices, specially adapted for sport equipment, e.g. display mounted on treadmills
- A63B71/0622—Visual, audio or audio-visual systems for entertaining, instructing or motivating the user
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- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B71/00—Games or sports accessories not covered in groups A63B1/00 - A63B69/00
- A63B71/06—Indicating or scoring devices for games or players, or for other sports activities
- A63B71/0619—Displays, user interfaces and indicating devices, specially adapted for sport equipment, e.g. display mounted on treadmills
- A63B2071/065—Visualisation of specific exercise parameters
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Abstract
The invention discloses a portable golf simulation system capable of being networked and a simulation method. Wherein, the golf simulation method comprises the following steps: s1, selecting a club and acquiring club information, detecting club movement information of the golf club in real time, and calculating club movement parameters according to the club movement information; s2, calculating golf ball motion parameters required by the motion trail of the simulated golf ball according to the acquired club information and the club motion parameters; and S3, obtaining golf ball motion parameters, analyzing the stress condition of the ball in the motion process according to the backspin and the sidespin in the golf ball motion parameters, and calculating the motion track of the golf ball according to the initial motion condition and the stress condition of the ball. The invention fully considers the type of the golf club and the influence of the back-spin and the side-spin on the movement track of the golf, greatly enhances the interactivity and the effectiveness of the swing practice, and also improves the authenticity and the accuracy of the movement track simulation.
Description
Technical Field
The invention relates to a golf simulation method, and simultaneously relates to a portable golf simulation system for realizing the golf simulation method, belonging to the field of virtual sports equipment.
Background
In recent years, the number of people who enjoy golf is gradually increasing, and in order to assist training and entertainment of golf, an indoor virtual golf system has appeared on the market, which allows users to experience real swings indoors and enjoy virtual golf activities. Basically, when a user hits a golf ball placed on a golf mat by swinging a golf club, an indoor virtual golf system senses the golf ball via a sensing device to obtain physical characteristics of the golf ball, and implements an image simulating a movement trajectory of the golf ball in a virtual golf course using the obtained physical characteristics.
The existing indoor virtual golf system has the advantages of real simulation and good user experience, but has the main problems of large occupied area and high cost, and is not suitable for being purchased and used by common golf users. The main reasons for these problems are two: the golf swing parameter measuring device is a core component in an indoor virtual golf system, and a measurer for measuring golf swing parameters is separated from a club and is large in size; secondly, the virtual golf simulation software runs on a Personal Computer (PC), and a projector is used for projecting a virtual scene onto a large screen, so that the cost is higher.
These problems affect the popularization and application of the indoor virtual golf system, and are not beneficial to the training of golfers to improve the golf level anytime anywhere.
In order to solve the above problems, some companies have introduced golf swing detectors. The golf club is fixed on a common golf club, multiple sensors such as an acceleration sensor are arranged in the golf club, the physical characteristics of the golf club can be detected in real time when a user swings, and then data are transmitted to a smart phone, a tablet personal computer or a personal computer in real time through wireless transmission modules such as Bluetooth. In addition, the price of the golf club head is low, and the golf club head is suitable for being purchased and used by common golf users. However, it has obvious disadvantages that only swing data can be displayed and analyzed simply, interaction with a virtual scene is lacked, a user cannot see the flying track and picture of the ball in the virtual scene, and interactivity and interestingness are lacked.
In addition, the materials, lengths, head shapes, head materials, head weights, and loft angles (vertical inclination angles of the club head front) of the various golf clubs differ. Depending on the layout of the golf course or the distance desired to be hit, a professional golfer needs to select an appropriate golf club from among a variety of golf clubs and hit the ball with the selected golf club. Each golf club has different characteristics with respect to the distance traveled and spin after the ball is struck. However, many of the existing indoor virtual golf systems or swing detectors cannot directly detect the spin data of the ball, estimate the shot according to uniform data and rules, and do not apply the characteristics of the golf club currently used by the golfer to the sensed result, thereby failing to provide accurate and perfect simulation results.
Disclosure of Invention
The invention provides a golf simulation method.
Another technical problem to be solved by the present invention is to provide a portable golf simulation system that can be networked.
In order to achieve the purpose, the invention adopts the following technical scheme:
a golf simulation method comprising the steps of:
s1, selecting a club and acquiring club information, detecting club movement information of the golf club in real time, and calculating club movement parameters according to the club movement information;
s2, calculating golf ball motion parameters required by the motion trail of the simulated golf ball according to the acquired club information and the club motion parameters;
and S3, obtaining golf ball motion parameters, analyzing the stress condition of the ball in the motion process according to the backspin and the sidespin in the golf ball motion parameters, and calculating the motion track of the golf ball according to the initial motion condition and the stress condition of the ball.
Preferably, in step S1, club movement information of the golf club is detected in real time, a swing trajectory is simulated according to all club movement information detected during the swing, and the swing trajectory is presented to the user.
Preferably, in step S2, the golf ball game parameters include initial velocity, takeoff angle, deviation angle, backspin and sidespin of the ball.
Preferably, the initial velocity of the ball is obtained by using the following formula:
wherein V is the initial velocity of the ball after impact; u is the instantaneous speed of the club head before impact; m is the mass of the ball; m is the mass of the club head; al is the face inclination angle; e is a variable coefficient.
Preferably, the reverse rotation is obtained by the following formula:
Backspin＝f*Vc*sin(Al)
wherein Backspin represents the Backspin, f is the Backspin coefficient, Vc is the head speed, and Al is the face inclination angle.
Preferably, the side spin is obtained by the following formula:
Sidespin＝g*Vc*sin(Ac)
wherein Sidespin represents Sidespin, g represents a Sidespin coefficient, Vc represents a club head speed, and Ac represents a club face angle.
Preferably, in step S3, the stress condition of the ball during the movement is analyzed according to the backspin and the sidespin in the golf ball movement parameters, and the movement track of the golf ball is calculated according to the initial movement condition and the stress condition of the ball, including the following steps:
firstly, acquiring the initial speed, takeoff angle and deflection angle of a ball, and acquiring the initial motion state of the ball according to the initial speed, takeoff angle and deflection angle of the ball;
then, analyzing the stress magnitude and direction of the ball in the moving process according to the backspin and the sidespin in the golf motion parameters; the stress of the ball in the motion process comprises gravity and air resistance; the air resistance is decomposed into lift force and pulling force; the lifting force is vertical to the speed direction, and the pulling force is opposite to the speed direction;
and finally, applying the force and direction of the ball in the moving process to the ball in the initial moving state to obtain the moving track of the golf ball.
Preferably, the golf simulation method further comprises the following steps:
and S4, displaying the calculated movement track of the golf ball on a display screen or a projection screen of the electronic terminal.
A portable golf simulation system capable of being networked is used for realizing the golf simulation method, and comprises a sensing unit, a first simulation unit, a second simulation unit, a storage unit, a display unit and a transmission unit;
wherein the sensing unit is used for detecting club movement information of a golf club used by a golfer in real time and transmitting the club movement information to the first simulation unit through the transmission unit.
The first simulation unit is used for calculating club movement parameters according to the club movement information and the club information; and transmitted to the second analog unit through the transmission unit;
the second simulation unit is used for generating golf ball motion parameters according to the club motion parameters and generating a motion track of a golf ball according to the golf ball motion parameters;
the display unit is used for displaying the swing track of a golf club or the movement track of a golf ball.
Preferably, the storage unit comprises a golf club information storage module, a club parameter storage module and a golf ball parameter storage module;
wherein the golf club information storage module is used for storing club information of a golf club;
the club parameter storage module is used for storing the obtained club motion parameters;
the golf ball parameter storage module is used for storing the acquired golf ball motion parameters. The golf simulation method provided by the invention obtains the club motion parameters by analyzing and calculating the club motion information of the golf club detected in real time; calculating golf ball movement parameters required to simulate a movement trajectory of a golf ball, further considering club information of the golf club used during a swing and club movement parameters; and finally, analyzing the stress condition of the ball in the moving process according to the backspin and the sidespin in the golf ball moving parameters, and calculating the moving track of the golf ball according to the initial moving condition and the stress condition of the ball. The simulation method and the simulation system fully consider the type of the golf club and the influence of the backspin and the sidespin on the movement track of the golf ball, thereby greatly enhancing the interactivity and the effectiveness of the swing practice and also improving the authenticity and the accuracy of the movement track simulation.
Drawings
FIG. 1 is a schematic diagram of a portable golf simulation system according to the present invention;
FIG. 2 is a flow chart of a golf simulation method according to the present invention;
FIG. 3a is a schematic illustration of the initial trajectory of a ball when struck at an upward attack angle, in accordance with one embodiment of the present invention;
FIG. 3b is a schematic illustration of the initial trajectory of a ball when struck at a horizontal attack angle, in accordance with one embodiment of the present invention;
FIG. 3c is a schematic illustration of the initial trajectory of a ball when struck at a downward attack angle in one embodiment of the invention;
FIG. 4 is a schematic view of the structure of the swing path in an embodiment of the present invention;
FIG. 5 is a schematic illustration of the relationship of ball flight direction, swing direction, and face orientation for a ball struck by a club according to one embodiment of the present invention;
FIG. 6 is a schematic illustration of the initial trajectory of a ball without generating a side spin when the club strikes the ball, in accordance with one embodiment of the invention;
FIG. 7 is a schematic illustration of the initial trajectory of a ball that produces a slice when struck by a club in accordance with one embodiment of the present invention;
FIG. 8 is a schematic illustration of the initial trajectory of a ball to produce a hook when struck by a club in accordance with one embodiment of the present invention;
FIG. 9 is a schematic illustration of different trajectories of movement of a golf ball according to an embodiment of the present invention;
fig. 10 is a schematic diagram of the force applied to a ball during flight in one embodiment of the present invention.
Detailed Description
The technical contents of the present invention will be further described in detail with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1, the portable golf simulation system provided by the present invention includes a sensing unit, a first simulation unit, a second simulation unit, a storage unit, a display unit, and a transmission unit. Wherein, the sensing unit is used for detecting club movement information of a golf club used by a golfer in real time and transmitting the detected club movement information to the first simulation unit through the transmission unit. The transmission unit may be a wired transmission or a wireless transmission. In one embodiment of the present invention, the sensing unit may be a portable golf swing measurer, which is small in size and can be fixed to a general golf club. The sensing unit includes sensors such as an acceleration sensor, a magnetic sensor, and a gyroscope, detects information such as acceleration, angular velocity, and a geomagnetic heading angle of a golf club during a swing stroke of a golfer (user) in real time, and generates data required for calculating a plurality of parameters of a swing trajectory of the golf club and a movement trajectory of a golf ball hit by the golfer, based on the information detected in real time. And then, data are transmitted to the first simulation unit and the second simulation unit in real time through wireless transmission units such as Bluetooth and WIFI for calculation processing, swing tracks of the golf club and tracks of the golf ball flying in the virtual court are generated, and the swing tracks and flying pictures are dynamically displayed in front of users in real time.
The first simulation unit is used for receiving club movement information such as acceleration, angular velocity, geomagnetic heading angle and the like of a golf club during a swing and hitting process of the golf club, transmitted by the sensing unit, acquiring club information from the storage unit, and calculating the speed, direction and the like of the golf club in real time according to the detected club movement information and club information so as to obtain a swing track and a club face inclination angle of the golf club. The club motion parameters are transmitted to the second simulation unit through the transmission unit and are simultaneously stored in the storage unit. The club motion parameters comprise parameter information such as the instant speed of the club head before hitting the ball, the loft angle and the like. The first analog unit may be installed on the golf analog detector together with the sensing unit, or may be a software module running on a smart tv or a personal computer.
The second simulation unit is used for generating golf ball motion parameters according to the club motion parameters of the golf club, generating a golf ball motion track according to the golf ball motion parameters, and storing the golf ball motion parameters in the storage unit for storage, so that the information can be analyzed and processed at the later stage conveniently.
The first and second analog units may be configured as separate devices or units, but may also be combined within a single device or unit.
The storage unit stores all data required for golf simulation. The storage unit comprises a golf club information storage module, a club parameter storage module and a golf ball parameter storage module. The golf club information storage module is used for storing club information of a golf club. Golf clubs are classified into woods, irons, and putters. The clubs commonly used by people generally include a No. 1 wood club, a No. 3 wood club, a No. 5 wood club, a No. 3 iron club, a No. 4 iron club, a No. 5 iron club, a No. 6 iron club, a No. 7 iron club, a No. 8 iron club, a No. 9 iron club, a P club, an S club and a push club. In order to improve the simulation effect, in the embodiment provided by the invention, before taking a swing, a golfer selects a club to be used, obtains information of the club to be used from the golf club information storage module, and calculates the movement track of the golf ball according to the information. The club parameter storage module is used for storing the obtained club motion parameters. The golf parameter storage module is used for storing the acquired golf motion parameters, so that the golf motion track can be repeatedly checked and analyzed at the later stage. The storage units may be configured as separate storage devices or may be implemented within portions of a physical area of a single storage device.
The display unit is used for displaying the swing track of a golf club or the movement track of a golf ball according to the needs of a golfer. In the embodiment provided by the present invention, the display unit may be one of a smart phone, a tablet computer, a smart television, or a personal computer.
The portable golf simulation system provided by the invention can be used for practicing in front of a smart phone, a tablet personal computer, a smart television or a personal computer in a way of idle swing or batting at any place such as a living room, an office and the like, and can be networked with other people for competition. If the actual golf ball is hit during the swing, a small cage may be placed aside to catch the hit golf ball. The golf swing simulation system has the advantages that the floor area of the golf simulation system is effectively reduced, the authenticity of the golf simulation system can be improved, the interestingness and the interactivity of swing practice are greatly enhanced, and the user experience degree is improved.
Fig. 2 is a flow chart of a golf simulation method provided by the present invention, which specifically includes the following steps:
and S1, selecting a club and acquiring club information, detecting club movement information of the golf club in real time, and calculating club movement parameters according to the club movement information.
Since the movement trajectory of the generated golf ball is different depending on the length and face parameters of each club, club information on the club to be used is acquired from the storage unit according to the club to be used before a game of golf networking or a golf swing exercise is performed. When the golf simulation training is carried out, a portable golf swing measuring device (golf swing measuring device for short) is fixed on a common golf club, club motion information such as acceleration, angular velocity, geomagnetic course angle and the like of the golf club is detected in real time, and club motion parameters such as the instant velocity of a club head before hitting a ball, the face inclination angle and the like are calculated according to the club motion information by adopting basic physics knowledge. In the embodiment provided by the present invention, club movement information of a golf club is detected in real time, a swing trajectory is simulated according to all club movement information detected during a swing, and the swing trajectory is presented to a user. The swing track can be checked and analyzed repeatedly at the later stage.
And S2, calculating golf ball movement parameters required by the simulation of the golf ball movement track according to the acquired club information and the club movement parameters.
In golf, in order to obtain a good distance and a good landing point, it is necessary to control a swing to obtain a desired speed, takeoff angle (elevation angle), deflection angle, backspin, and sidespin. The ball will produce back spin and side spin during flight. The speed, takeoff angle and backspin have an important influence on the flying height and flying distance of the ball, and the deflection angle and sidespin have an important influence on the flying direction of the ball. Therefore, it is necessary to calculate golf ball movement parameters required for simulating a golf ball movement trajectory based on the acquired club information and the club movement parameters. In the embodiments provided herein, the golf ball game parameters include initial velocity, take-off angle, deviation angle, Backspin (Backspin), and Sidespin (Sidespin) of the ball. The process of obtaining the parameters of each golf ball game will be described in detail below.
The obtained information is information of a golf club, and in order to obtain a movement trajectory of a golf ball, it is necessary to convert a speed from the club to the ball. The speed of the ball is determined mainly by the head speed, the position of the ball in the impact and the type of the club. The head speed can be calculated from the swing angular speed calculated by the golf swing measuring device, the type of club used (the length of the club and the weight of the club head can be known), and the fixing position of the golf swing measuring device on the club. This is the basic knowledge of physics and will not be described herein. With the same cue, if the ball is hit firmly or the point of impact is the sweet spot of the face, the ball will fly farther. The sweet spot is the focal point of the face (usually in the center position) and if the ball is hit at that point during play, a solid ball contact and maximum distance are obtained. In the examples provided by the present invention, it is assumed that all shots are located at the sweet spot. From this assumption, ball speed can be obtained using a formula obtained through a large number of actual swing measurements:
wherein V is the initial velocity of the ball after impact; u is the instantaneous speed of the club head before impact; m is the ball mass, typically 1.62 ounces; m is the mass of the head, typically 5-15 ounces, the weight of which is known for different club types; al is the face inclination angle; e is a variable coefficient, and scores typically vary slowly between 0.67-0.80 in the case of a hard-to-flick.
The initial velocity of the golf ball when hit by the club can be obtained according to the formula (1). According to basic physics knowledge, the balls with the same initial speed have different takeoff angles, and the motion tracks of the balls are greatly different. The take-off angle Of a ball is mainly determined by the face tilt angle Of the club used and the attack angle (angle Of attack) at the moment Of hitting the ball by the club head. Figures 3a, 3b and 3c are schematic representations of the initial trajectory of a ball when struck at an upward attack angle, a horizontal attack angle and a downward attack angle, respectively. The face inclination angle (inclination angle for short) is an angle formed by the face and the shaft axis, that is, the degree of inclination of the face. The larger the tilt angle, the larger the take-off angle of the ball. After a club is selected and club information is acquired, the inclination angle of the club can be known, and the takeoff angle of the ball is calculated according to a fitting formula of the inclination angle and the takeoff angle summarized by a large amount of actual swing data:
Ap＝(Al*2/3+Aa)*c
wherein Ap is a takeoff angle; al is the face inclination angle; c is an attack coefficient, the attack coefficient of each club is slightly different, and the attack coefficient of the club can be obtained according to the club information of the club selected by the initial golfer.
The backspin of the ball is closely related to the speed of the head and the pitch angle of the head. After the club is selected and club information is obtained, the loft angle of the club can be known. The head speed is calculated based on the basic knowledge of physics, and the ball backspin speed is estimated based on a fitting formula of the face tilt angle, the head speed, and the ball backspin, which are summarized from a large amount of actual swing data.
Backspin＝f*Vc*sin(Al)
Wherein f is a backspin coefficient, the backspin coefficient of each club is different, and the backspin coefficient of the club can be obtained according to the club information of the club selected by the initial golfer. Vc is the club head speed; al is the face tilt angle.
In addition to the initial velocity, take-off angle, backspin of the ball, the deviation angle and sidespin of the ball are also important to obtain the trajectory of the ball in air after the ball is struck by the club in three dimensions. The angle of deflection of the ball relative to the "ball to target line" is closely related to the angle of the club face at the moment of impact with the target line and the swing path.
The Swing Path (Swing Path) is a Path formed by the direction from the ball to the target line at the time of Swing, immediately before the ball impact, at the time of ball impact, and immediately after the ball impact, and is a part of the Swing trajectory. With a "ball to target line" boundary, the line near the player is called the "inside the line" and the line outside the "ball to target line" is called the "outside the line". The swing path can be divided into three types: from outside to inside (Out to In), from inside to outside (In to Out), and from inside to inside (In to In). As shown in fig. 4, an outside-to-inside (Out-to-in) swing path represents a ball that would fly from the left of the predetermined "ball-to-target line," whereas an inside-to-outside (in-to-Out) swing path represents a ball that would fly from the right of the predetermined "ball-to-target line. When the ball flies Straight out unbiased toward the "ball-to-target line", it is called the "Inside-to-Straight-to-Inside" swing path.
Assuming that the friction coefficient between the ball and the club face is 0 at the moment of ball-club collision, the deflection angle of the ball is the same as the included angle between the club face and the target line according to the physics of rigid body collision. Considering the influence of the swing path, the club will bring the ball in a direction slightly biased toward the swing path, as shown in fig. 5. The direction in which the ball finally flies is offset toward the club face between the club face orientation and the swing direction. The angle between the ball flight direction and the face orientation is approximately 1/3 degrees from the face orientation and swing direction according to the actual measurement formula. Accordingly, the ball deflection angle can be calculated from the swing path and the face angle.
The formula of the deflection angle of the ball is: ab ═ Ac- (Ac-As)/3. Wherein Ab is the deviation angle of the ball; ac is the face orientation angle of the club face, and the face orientation angle is the included angle between the club face and the target line from the ball to the club face; as is the swing direction angle, which is the angle between the swing direction and the ball-to-target line ". Both the face orientation angle and the swing direction angle may be calculated from club motion information, and will not be described herein.
The ball, at the moment of impact by the head, may experience a roll due to the non-uniformity of the swing path and loft. Face Angle refers to the Angle of the Face and ball when in contact with the swing path, not the target line. The angle of the face when touching the ball is either square (2, 5, 8), open (3, 6, 9) or closed (1, 4, 7). The swing path in the ball-contacting region provides the initial direction of the ball, and the direction of the face at the time of ball contact determines the final flight curvature of the ball. The ball may initially fly directly to the destination, to the right of the destination (push right), or to the left of the destination (pull left). In each path, the direction of the club face at the time of ball contact determines whether the ball curves right, left, or continues to fly straight.
There are three cases of the face angle, in which a gray arrowless thick line represents a swing path, a black arrowed line represents a flight direction of the ball, and fig. 6 is a case of the face square, in which the ball does not generate a side spin. Fig. 7 shows the face open, which would cause the ball to spin right, creating a curved flight path to the right. Fig. 8 shows the face closed, which would give the ball a left-hand spin, giving a left-hand curved flight path.
As shown in fig. 9, the golf ball can be divided into 9 different flight paths according to the swing path and the direction of the club face, and the 9 flight paths are: a straight flyball, a small draw ball, a small fade ball, a draw fade ball, a push right ball.
The ① locus is, among other things, draw-left (Pull Hook), where the ball initially flies to the left of the "ball to target line" and then curves left.
②, the trajectory of the ball is draw (Pull) where the ball initially flies to the left of the "ball to target line" and continues along the straight line.
③, the trace is a left-right-pull curve (Slice) where the ball starts flying to the left of the "ball-to-target line" and then curves to the right.
④, the trajectory of a small draw (Hook) begins with the ball following the "ball to target line" direction and then finally bends to the left.
⑤, the trajectory is Straight (Straight). The line of swing is a flight line that flies Straight toward the ball to the target line.
⑥, the trace is a small right curve (Fade) that begins with the ball following the "ball to target line" direction and then eventually curves to the right due to the open face swing toward the swing path.
⑦, the trajectory of motion is Draw (Draw) where the ball initially flies to the right of the "ball to target line" and then eventually curves left.
⑧, the trace is Push (Push) where the ball starts flying to the right of the "ball to target line" and continues to follow the straight line, which is generated because the head swings with a flat face toward the swing path by pushing on the right wrist.
⑨, the trace is a Push Slice (Push Slice) where the ball starts flying to the right of the "ball to target line" and then curves to the right.
With the above rules, the lateral spin direction of the ball can be analyzed according to the face angle. The magnitude of the roll velocity (roll) is approximately proportional to the head velocity and is related to the loft angle. The larger the face angle, the greater the yaw rate. The fitting formula for the side spin is as follows:
Sidespin＝g*Vc*sin(Ac)
wherein g is a sidespin coefficient, the sidespin coefficient of each club is different, and the sidespin coefficient of the club can be obtained according to club information of the club selected by an initial golfer. Vc is the club head speed; ac is the face angle.
And obtaining all golf ball motion parameters required by simulating the golf ball motion trail according to the obtained club information and the club motion parameters. According to the golf ball motion parameters, the pictures and the tracks of the golf ball flying in the virtual scene can be simulated in real time.
And S3, obtaining all golf motion parameters needed by simulating the motion trail of the golf ball, analyzing the stress magnitude and direction of the golf ball in the motion process according to the backspin and the sidespin in the golf motion parameters, and calculating the motion trail of the golf ball according to the initial motion condition and the stress condition of the golf ball.
The golf ball motion parameters required by the golf ball motion track simulation are calculated according to the acquired club information and the club motion parameters, and are processed in real time, so that the pictures and the track of the golf ball flying in a virtual scene can be simulated in real time, a multiplayer match can be supported, and the interestingness and the interactivity of swing practice are greatly enhanced.
To obtain the movement trajectory of the golf ball, the initial state of the golf ball and the force applied thereto during flight are analyzed. The golf ball experiences gravity Fg and air resistance during flight, which in turn can be resolved into lift Fl and drag Fd. The lift force Fl is perpendicular to the speed direction and the pull force Fd is opposite to the speed direction.
According to the knowledge of physics, gravity: fg ═ m × g; lifting force:
tension force:
wherein m is the mass of the ball and g is the acceleration of gravity; cl is the coefficient of the lifting force and the air,
ρ is the air density, r is the golf ball radius, and v is the ball velocity. ω is the ball rotation speed, which is the total rotation value after adding the backspin and sidespin vectors. Cd is the coefficient of tensile strength air, which ranges from 0.21 to 0.25, where the average value can be taken to be 0.23.
When the magnitude and direction of the force applied to the golf ball during the movement process are obtained, the movement track of the ball can be obtained according to the initial speed, the takeoff angle and the deflection angle of the ball and the basic physics knowledge, which is not described herein again.
And S4, displaying the calculated movement track of the golf ball on a display screen or a projection screen of the electronic terminal.
After the calculation of the movement trace of the ball is completed, the calculated movement trace of the golf ball may be displayed on a display screen or a projection screen of the electronic terminal as needed. The electronic terminal can be any one of a smart phone, a tablet computer, a smart television or a personal computer. Can be selected according to the requirements of the environment where the golfer is located, and is convenient to use.
In summary, in the golf simulation method provided by the present invention, before the swing is performed, a club is selected and club information is obtained, club movement information of the golf club is detected in real time, and club movement parameters are calculated according to the club movement information; then, calculating golf ball motion parameters required by the simulated golf ball motion track according to the acquired club information and the club motion parameters; finally, the stress condition of the ball in the moving process is analyzed according to the backspin and the sidespin in the moving parameters of the golf ball, and the moving track of the golf ball is calculated according to the initial moving condition and the stress condition of the ball. In addition, the portable golf simulation system provided by the invention has the following advantages.
1) The cost is low. The golf simulation measurer adopted by the sensing unit is about thousand yuan, the first simulation unit and the second simulation unit can calculate on the golf simulation measurer and also can calculate on a smart phone, a tablet, a smart television and a personal computer, and the processing is flexible.
2) Is convenient to use. The golf simulation measuring device is directly inserted at the tail of the club, worn on a glove or tied on the club, and can be used by matching with a smart phone, a tablet and the like.
3) The effect is good. Besides analyzing the club motion parameters, the golf club control system can interact with virtual golf simulation software on a smart phone or a tablet personal computer, and can perform online competition, so that the interestingness and the interactivity of swing practice are greatly enhanced.
The portable golf simulation system and the simulation method according to the present invention are described in detail above. Any obvious modifications thereof, which would occur to one skilled in the art without departing from the true spirit of the invention, would constitute a violation of the patent rights of the present invention and would bear corresponding legal responsibility.
Claims (10)
1. A golf simulation method, comprising the steps of:
s1, selecting a club and acquiring club information, detecting club movement information of the golf club in real time, and calculating club movement parameters according to the club movement information;
s2, calculating golf ball motion parameters required by the motion trail of the simulated golf ball according to the acquired club information and the club motion parameters;
and S3, obtaining golf ball motion parameters, analyzing the stress of the ball in the motion process according to the backspin and the sidespin in the golf ball motion parameters, and calculating the motion trail of the golf ball according to the initial motion and the stress of the ball.
2. The golf simulation method of claim 1, wherein:
in step S1, club movement information of a golf club is detected in real time, a swing trajectory is simulated according to all club movement information detected during a swing, and the swing trajectory is presented to a user.
3. The golf simulation method of claim 1, wherein:
in step S2, the golf ball game parameters include an initial velocity, a takeoff angle, a deviation angle, a backspin, and a sidespin of the ball.
4. The golf simulation method of claim 3, wherein:
the initial velocity of the ball is obtained by the following formula:
where V is the initial velocity of the ball after impact, u is the instantaneous velocity of the club head before impact, M is the mass of the ball, M is the mass of the club head, Al is the face inclination angle, and e is the variable coefficient.
5. The golf simulation method of claim 3, wherein:
the reverse rotation is obtained by the following formula:
Backspin＝f*Vc*sin(Al)
wherein Backspin is the Backspin, f is the Backspin coefficient, Vc is the club head speed, and Al is the face inclination angle.
6. The golf simulation method of claim 3, wherein:
the side spin is obtained by the following formula:
Sidespin＝g*Vc*sin(Ac)
wherein Sidespin is Sidespin, g is Sidespin coefficient, Vc is club head speed, and Ac is club face angle.
7. The golf simulation method according to claim 5 or 6, wherein the force profile of the ball during the game is analyzed according to the backspin and the sidespin among the game parameters of the golf ball, and the game trajectory of the golf ball is calculated from the initial game profile and the force profile of the ball at step S3, comprising the steps of:
firstly, acquiring the initial speed, takeoff angle and deflection angle of a ball, and acquiring the initial motion state of the ball according to the initial speed, takeoff angle and deflection angle of the ball;
then, analyzing the stress magnitude and direction of the ball in the moving process according to the backspin and the sidespin in the golf motion parameters; the stress of the ball in the motion process comprises gravity and air resistance; the air resistance is decomposed into lift force and pulling force; the lifting force is vertical to the speed direction, and the pulling force is opposite to the speed direction;
and finally, applying the force and direction of the ball in the moving process to the ball in the initial moving state to obtain the moving track of the golf ball.
8. The golf simulation method of claim 1, further comprising the steps of:
and S4, displaying the calculated movement track of the golf ball on a display screen or a projection screen of the electronic terminal.
9. A portable golf simulation system capable of being networked for implementing the golf simulation method according to any one of claims 1 to 8, comprising a sensing unit, a first simulation unit, a second simulation unit, a storage unit, a display unit and a transmission unit;
wherein the sensing unit is used for detecting club movement information of a golf club used by a golfer in real time and transmitting the club movement information to the first simulation unit through the transmission unit;
the first simulation unit is used for calculating club movement parameters according to the club movement information and the club information; and transmitted to the second analog unit through the transmission unit;
the second simulation unit is used for generating golf ball motion parameters according to the club motion parameters and generating a motion track of a golf ball according to the golf ball motion parameters;
the display unit is used for displaying the swing track of a golf club or the movement track of a golf ball.
10. The portable golf simulation system of claim 9, wherein:
the storage unit comprises a golf club information storage module, a club parameter storage module and a golf ball parameter storage module;
wherein the golf club information storage module is used for storing club information of a golf club;
the club parameter storage module is used for storing the obtained club motion parameters;
the golf ball parameter storage module is used for storing the acquired golf ball motion parameters.
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| CN106815476A (en) * | 2017-01-13 | 2017-06-09 | 腾讯科技（深圳）有限公司 | A kind of method and device for determining emitter flight path in application |
| CN106890436B (en) * | 2017-04-12 | 2019-01-11 | 广东亮子科技有限公司 | Golf club and golf VR simulation system |
| CN108126336B (en) * | 2017-12-29 | 2020-04-03 | 深圳市酷浪云计算有限公司 | Method, device, electronic equipment and storage medium for realizing golf tracking |
| CN109107124A (en) * | 2018-09-26 | 2019-01-01 | 上海与德科技有限公司 | A kind of smart motion analogy method, device, system and storage medium |
| KR102024831B1 (en) | 2018-10-29 | 2019-09-25 | 주식회사 크리에이츠 | Method, system and non-transitory computer-readable recording medium for measuring ball spin |
| EP4035143A1 (en) * | 2020-01-21 | 2022-08-03 | Trackman A/S | System and method for tracking sports balls |
| KR102439549B1 (en) * | 2020-09-14 | 2022-09-02 | 주식회사 골프존 | Device for sensing golf swing and method for sensing impact position on club head using the same |
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| US6758759B2 (en) * | 2001-02-14 | 2004-07-06 | Acushnet Company | Launch monitor system and a method for use thereof |
| TWI424865B (en) * | 2009-06-30 | 2014-02-01 | Golfzon Co Ltd | Golf simulation apparatus and method for the same |
| KR100970675B1 (en) * | 2009-11-30 | 2010-07-15 | (주) 골프존 | Virtual golf simulation device and system including the same, and method for virtual golf simulation |
| KR101048091B1 (en) * | 2011-03-22 | 2011-07-08 | (주) 골프존 | Apparatus and method for virtual golf simulation, and sensing device and method used to the same |
| TWI458526B (en) * | 2011-06-22 | 2014-11-01 | Golfzon Co Ltd | Virtual golf simulation apparatus for providing user-customized practice environment, server connected with the same through network, and user-customized practice environment provision method using virtual golf simulation |
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