KR20030085766A - A golf shot analyzer and analyzing method using linear sensors - Google Patents

Abstract

PURPOSE: A device and method for analyzing a golf stroke using linear sensors are provided to maximize the efficiency of a stroke practice for precisely sending a ball in a desired direction and to a desired spot by analyzing and displaying a flying ball. CONSTITUTION: The device comprises: three linear sensors(10A,10B,10C) for perceiving the position of a flying golf ball; sensor controllers(20A,20B,20C) for controlling the driving of the linear sensors(10A,10B,10C); a microprocessor(40) for calculating the progress direction and speed of the ball and outputting the same along with the position information of the ball; a computer(50) for calculating the trajectory and landing point and providing the same as a stroke analysis information; and a monitor(60) for displaying the stroke analysis information on a screen.

Description

A golf shot analyzer and analyzing method using linear sensors

The present invention relates to the golf ball analysis, and more specifically, to analyze the results of the ball speed, elevation, direction, trajectory and expected landing point by detecting the movement of the flying ball after hitting the ball in the golf course The present invention relates to a golf batting analyzer and analysis method using a linear sensor that provides accurate batting analysis information on a ball by displaying a foreground picture on a background.

At present, the number of golf lovers in Korea is 2 million, and the popularity of golfers is increasing as the number of golf lovers is increasing, considering the performances of Park Se-ri and Kim Mi-hyun of LPGA, and the increase of broadcasting time for public and cable broadcasting. Will increase further. Moreover, with the government's five-day workweek ahead, more people are expected to find a golf course. Golf is increasingly being marketed as a luxurious and natural leisure for sports, social and business purposes.

Ordinary golf enthusiasts go to the golf course to play or practice their swings at the golf practice. There are dozens of golf courses across the country, and there are thousands of golf courses indoors and outdoors. Those who are new to golf work hard to improve their skills and invest heavily. Beginning with a swing practice at golf practice, the emphasis is on acquiring skills that increase precision as your skills increase. Improving golf skills is evident as a reduction in strokes while rounding at the golf course. Accordingly, golf beginners as well as experts often practice swings at golf courses to improve their skills and adapt to the field before going to the golf course.

The purpose of the swing practice is to develop good posture and improve the accuracy of sending the ball to the desired position. Ultimately, you're reducing the number of hits in the game on the golf course. In particular, high-end golfers have a great interest in which direction spin occurs, such as a hook or slice, after the ball has traveled a certain distance.

At the current practice range, a speedometer is installed behind the plate to show the speed of the ball numerically. This speedometer uses the same Doppler effect as the method used for speeding cars. When the Doppler effect emits light of a certain frequency on a moving object, the frequency of the reflected light is accelerated or slowed down depending on the relative speed between the emission point and the moving object.

However, the speedometer used in the golf practice as described above can measure only one direction speed (flying speed) of the ball, there is a limit that can not know the path, direction, elevation, flying distance, landing point and the like of the ball at all. In addition, the indoor golf driving range is only about 6 meters from the plate to the ball hitting and falling nets can not see the ball flying. The distance from the plate to the net is generally only about 40m, so you can only see the ball float in the air, and you can't see the spot where the ball falls. In other words, if you want to send the ball 100 yards, there is no way to verify that you sent the ball exactly 100 yards away.

Therefore, the object of the present invention was devised in view of the above-mentioned point, by installing a sensor for detecting the movement of the ball on the batter of the golf practice field to grasp the position and speed of the flying ball, such as the speed, elevation, direction, A golf ball analyzer using a linear sensor that analyzes the trajectories and landing points and shows the results of the analysis on the screen with graphics and figures on the background of the golf course foreground picture, so that the ball can be seen and the final landing point. In providing an analysis method.

1 is a view showing an installation example of a golf ball analyzer according to the present invention,

2 is a block diagram showing a golf ball analyzer using a linear sensor according to the present invention,

3 is a detailed view showing the linear sensor of FIG.

4 is a flow chart for explaining the operation of the sensor controller of FIG.

5 is a view showing a coordinate system according to a linear sensor installation;

6A-6C illustrate a method of obtaining the starting elevation and starting direction of a ball from three linear sensor data;

FIG. 7 is a diagram for explaining a screen configuration on the monitor of FIG. 2; FIG.

8 is a view showing an example of the appearance of the front picture portion of the monitor screen of FIG.

9 is a view showing an example of the appearance of the side view portion of the monitor screen of FIG.

10 is a view showing an example of the appearance of a plan view of the monitor screen of FIG.

<Description of Symbols for Main Parts of Drawings>

10A, 10B, 10C: Linear Sensor 20A, 20B, 20C: Sensor Controller

30: ROM 40: Microprocessor

50: computer 51: switch

52: switch lamp 60: monitor

511: distance conversion switch 512: shutdown switch

Golf hitting analyzer using the linear sensor of the present invention for achieving the above object, in the equipment for the golf hit analysis of the golf practice range, three linear sensors for recognizing the position of the flying golf ball, and the linear sensor A sensor controller for driving control, a microprocessor for sending a ready signal to the linear sensor, receiving position information of the ball from the linear sensor, calculating a speed in which the ball travels, and outputting the position information along with the position information of the ball; A computer for calculating the starting elevation, starting direction, and speed of the ball by receiving the speed and position information of the ball through serial communication, calculating the trajectory and landing point of the ball and providing it as a batting analysis information; and And a monitor for displaying and displaying the batting analysis information provided by the computer. The.

Golf ball analysis method using the linear sensor of the present invention for achieving the object of the present invention, (1) the position of the ball in the space through the linear sensor and (2) the ball of the linear sensor Calculating a starting direction starting speed component of the ball through the time difference; and (3) calculating starting angle, starting direction, and speed of the ball based on the recognized position information of the ball and the calculated moving direction speed of the ball. Computing the ball's trajectory and landing point using the calculated information to calculate the analysis information of the other ball, and (4) by calculating the ball position and size on the projection plane according to the calculated trajectory of the ball A three-dimensional representation of the trajectory of the three-dimensional ball on the two-dimensional plane.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 shows an installation example of a golf ball analyzer according to the present invention.

1, three linear sensors 10A-10C are provided in front of the predetermined distance on the golf driving range at bat. In the present invention, three-dimensional spatial movement information of a flying golf ball is calculated using three linear sensors 10A to 10C. In addition, the computer 50 and the monitor 60 are installed at a proper position of the batter so that the golfer can easily monitor the result of the batting analysis of his ball. More specific configuration is shown in FIG.

2 is a block diagram of a golf ball analyzer using a linear sensor according to the present invention. The ball-ball analyzer shown in FIG. 2 is connected to three linear sensors 10A to 10C for recognizing the position of the ball, each sensor 10A to 10C, and a sensor controller 20A to 20C for controlling sensor driving. And a microprocessor 40 for sending a ready signal to each of the sensors 10A to 10C, receiving the position information of the ball from the sensors 10A to 10C, calculating the velocity component of the ball, and transmitting the position component together with the position information. Detailed configurations of the linear sensors 10A to 10C will be described later with reference to FIG. 3. Here, the microprocessor 40 uses an 80C196 microprocessor chip installed in the central portion of the three sensors 10A to 10C. The batting analyzer of FIG. 2 also analyzes the batting from the information collected by performing serial communication with the ROM 30 and the microprocessor 40 which store the software for driving the microprocessor 40. Computer (PC) 50, and a monitor 60 that provides a screen to monitor the result of the batting analysis. Here, the computer 50 contains the speed and elevation of the ball, the software for calculating the direction and trajectory, and the software for displaying the trajectory of the ball. On the other hand, the batting analyzer of Figure 2 is a switch 51 composed of the distance conversion switch 511 and the system shutdown switch 512, and a switch that is attached to correspond to each switch of the switch 51 is turned on or off depending on the switch state And a lamp 52. Herein, the distance conversion switch 511 is configured to select one of four distances of 100, 150, 200, and 300 yards, and the switch lamp 52 corresponds to four distances of the four distance conversion switches 511. It is composed of a lamp, and interlocked with the distance conversion switch 511.

3 is a detailed configuration of the linear sensors 10A to 10C of FIG. 2, and all three sensors are configured in the same manner. The sensor 10 shown in FIG. 3 counts the clock generator 11 generating the clock signal CLK and the generated clock signal CLK according to the oscillation frequency of an oscillator (not shown), and counts the generated clock signal CLK. A counter 12 for initializing a count value in accordance with a reset signal RST applied from the &lt; RTI ID = 0.0 &gt;), &lt; / RTI &gt; and a random pixel address decoder 13 operating according to the count value. The sensor 10 of Fig. 3 also includes a pixel selection switch 14 for selecting a pixel according to the pixel address of the random pixel address decoder 13, a pixel clear signal PRE and a function setting signal from the sensor controller 20. A pixel reset switch 15 for receiving (RMS) and erasing the stored contents of the pixel, and a memory element 16 including 1 * 1023 pixels. Meanwhile, the sensor 10 of FIG. 3 transmits the video signal Vo and the scan synchronous signal Syn representing the storage contents of the pixel selected by the pixel selection switch 14, that is, the ball position information, to the microprocessor 40. Output

Operation for the golf ball analysis using the linear sensor of the present invention having such a configuration will be described in detail with reference to FIGS. 4 to 10.

The microprocessor 40 runs by executing software loaded from the ROM 30. The microprocessor 40 sends a ball recognition ready signal to the three sensors 10A to 10C installed on the turn at bat. Each of the sensors 10A to 10C recognizes a position of a moving object, that is, a ball, by monitoring a space on a predetermined line in a predetermined direction when a ball recognition ready signal is transmitted from the microprocessor 40. The location of the ball is based on the lightness difference that occurs when the golf club's floor mat is dark green and a white golf ball passes over it. The position information of the ball recognized by each sensor 10A to 10C is transmitted to the microprocessor 40. To describe the operation of the sensors 10A to 10C in more detail, the linear sensors 10A to 10C are clock signals CLK having a predetermined frequency in the clock generator 11 according to the oscillation frequency of an oscillator (not shown). ). The counter 12 initializes the count value to "0" every time the reset signal RST is applied from the sensor controllers 20A to 20C, and counts the clock signal CLK generated by the clock generator 11. . The sensor controllers 20A to 20C reset the counter 12 whenever the count value of the counter 12 becomes " 1023 " which is the number of pixels of the memory element 16. The count value of the counter 12 is input to the random pixel address decoder 13 at the rear end, so that the pixel at the address position of the memory element 16 corresponding to the count value can be selected. The pixel selection switch 14 selects a pixel corresponding to the pixel address of the random pixel address decoder 13 among the pixels constituting the memory device 16 to store an image signal of the pixel. There is a lens (not shown) in front of the sensors 10A to 10C to collect the light and direct the light to a pixel designated according to the position of the ball. According to the intensity of light, the pixel in which the electrical signal is stored is a kind of memory device. When the light is strong, the value of the high voltage is stored, and in the dark, the value of the low voltage is stored. When the clear signal PRE is inputted from the sensor controllers 20A to 20C, the pixels constituting the memory element 16 erase all the values stored by the pixel reset switch 15 and enter a "0" volt state. When the clear signal PRE is not input to the pixel, the voltage value of the pixel continues to increase in proportion to the light intensity as the light signal corresponding to the magnetic position is input once every scan. When the pixel value reaches saturation, the stored value no longer changes when light enters. Accordingly, the pixel must clear the value at regular intervals. In general, the sensor scans the object once and then clears all the pixels, but when the light signal reflected from the object is weak, the object recognition rate is low and it is difficult to distinguish the background from the object. In order to overcome this problem, if a pixel is cleared after scanning an object several times, even if an object having a very small difference in background and brightness is accumulated several times, the voltage difference of the pixel increases, and thus the discriminating power is greatly improved. Here, the sensor controllers 20A to 20C operate to clear the pixel after scanning the object four times. That is, the sensor controllers 20A to 20C generate the reset signal RST when the count value of the counter 12 in the sensors 10A to 10C reaches " 1023 " to reset the count value of the counter 12 to " 0 ". When the reset signal RST reaches the " 4 &quot; th, a clear signal PRE is generated in the pixel memory device 16 to erase the value stored in the pixel. This operation flowchart is shown in FIG.

In Fig. 4, the sensor controllers 20A to 20C count the clock CLOCK in synchronization with the counter 11 contained in the corresponding sensors 10A to 10C (step 401). The sensor controllers 20A to 20C check whether the count value is the number of pixels of the sensors 10A to 10C, that is, "1023" (step 402). When the count value of step 402 reaches " 1023 ", the sensor controllers 20A to 20C generate the reset signal RST (step 403). The sensor controllers 20A to 20C input the generated reset signal RST to the corresponding linear sensors 10A to 10C to reset the count value of the counter 12 to " 0 " (step 404). The sensor controllers 20A to 20C also count the reset signal RST generated in step 403 (step 405). The sensor controllers 20A to 20C check whether the count value for the reset signal RST is a preset number of scans, that is, "4" (step 406). If the count value of step 406 is " 4 ", the sensor controllers 20A to 20C generate the pixel clear signal PRE (step 407). The sensor controllers 20A to 20C input the generated pixel clear signal PRE to the corresponding linear sensors 10A to 10C to erase the values stored in the pixels constituting the memory element 16 (step 408).

When the three sensors 10A to 10C recognize the movement of the ball once, the operation stops and the position value of the ball just recognized is stored. When the sensors 10A to 10C receive the ball recognition ready signal from the microprocessor 40, the sensors 10A to 10C start the operation for ball recognition. The sensors 10A to 10C having received the ball recognition ready signal erase the position value of the ball stored in the pixel which is the ball position storage memory element 16 in the self, and then wait for the ball to pass. When the ball passes through the sensors 10A to 10C, the sensors 10A to 10C store high voltage values in the pixels at positions corresponding to the balls among the 1023 pixels. This pixel value is accumulated four times, so it's easy to see if the ball's brightness is slightly different from the floor mat. The voltage difference between pixels due to the difference between the brightness of the floor mat and the ball is about 0.2 to 0.3V, so the voltage is too low to be applied to the digital circuit as it is. Thus, the output signal of each pixel is amplified to a value of 3 to 4 volts to make it above 2 volts, which is the minimum voltage that can operate the digital circuit. That is, when the ball passes through the recognition section of the sensors 10A to 10C, a relatively high voltage is recognized as the position information of the ball at the pixel position, and stored in the memory device 16 for storing the position information of the pixel. At this time, the ball is sent to the microprocessor 40 to recognize the ball is recognized by the sensor (10A ~ 10C), and the signal to the microprocessor 40 to take the position value of the ball.

The microprocessor 40 can easily perform 8-bit data and 16-bit address system, separate 8-bit input / output ports, multiple interrupt lines, A / D conversion, serial communication, and the like. The microprocessor 40 uses one bit of the 8-bit output port for sensor ready signal output, and the sensor ready signal is implemented using one bit of the P1 port that is generally used as an output port.

The microprocessor 40 may calculate the speed at which the ball is flying, that is, the starting direction velocity component of the ball, by using the time difference recognized by two of the three sensors 10A to 10C. The microprocessor 40 transmits the ball's heading direction speed and the ball's position information received from the three sensors 10A to 10C to the computer (PC) 50 so that the ball starts at an elevation angle, the heading direction, the ball's correct speed, and the like. To calculate the batting analysis information such as the trajectory and the landing point, which is the movement information in the three-dimensional space of the ball.

Prior to explaining the method of calculating the velocity component of the traveling (z-axis) direction, the coordinate system according to the installation in the spaces of the linear sensors 10A to 10C will be described.

5 is a view showing a coordinate system according to the installation of the linear sensors 10A to 10C. Referring to FIG. 5, the first sensor 10A may have a predetermined distance from the start point of flight of the ball. Fall), and install at a predetermined height (Hs). The second sensor 10B has a predetermined distance from the first sensor 10A ( It is installed at a predetermined height Hs on the left side of the plane separated by). The third sensor 10C has a predetermined distance from the first sensor 10A ( It is installed at a predetermined height Hs on the right side of the plane separated by). That is, the second sensor 10B is installed at the upper left side when viewed in the traveling direction of the ball at the plate, and the third sensor 10C is installed at the upper right side. The second and third sensors 10B and 10C are installed with a predetermined distance (2Ws) when considering only the x-axis direction with each other. The position coordinates of each sensor are defined as follows.

Position of the first sensor: (0, Hs, ( ))

Position of the second sensor: (-Ws, Hs, ( ))

Position of the third sensor: (Ws, Hs, ( ))

Distance on the z-axis between the first and second sensors:

Distance on the z axis between the first and third sensors:

Here, the x-axis is the + x axis on the right side and the -x axis on the left side when looking at the hole cup in the direction of the ball where the ball is hit, the y-axis is the + y axis in the height direction, and the z-axis is the direction in which the ball is directed. , + Z-axis the direction of the hole cup where the ball hits.

The position of the view point is a point (x, y, z) = (0, Hv, 0) in three-dimensional coordinates with respect to the camera position at which the golf course background photograph is taken, and the origin (0,0,0) Points to the ground surface of the viewpoint where the background image of the golf course is taken. Ball starting point position (0,0, ) Is the distance from the origin in the z-axis direction Projection Plane is on a plane with z = Lp where the hole cup is located, and is a rectangular area with height "Hp" and width "Wp". (-Wp / 2,0, Lp), (-Wp / 2, Hp, Lp), (Wp / 2,0, Lp), (Wp / 2, Hp, Lp).

Next, a method of calculating the z-axis velocity component of the ball will be described.

The microprocessor 40 uses the time difference between the two signals from the ball recognition signals sent from the first and second sensors 10A and 10B. Measure Distance between two sensors 10A, 10B ) And ball recognition time difference ( ), The starting velocity component of the ball in the z-axis ( Calculate This is defined by the following equation.

here, Is the z-axis component of the ball speed as a time difference between the ball recognition signals sent from the first and second sensors 10A and 10B.

The microprocessor 40 may calculate the speed of the ball calculated as in Equation 1 above. ) And the position information of the balls collected from the three linear sensors 10A to 10C are transmitted to the computer 50 through serial communication. The position information values of the balls collected from the three linear sensors 10A to 10C have a value between [0,1022], each of which is 10 bits, which is a total of 30 bits. The microprocessor 40 confirms that the value transmitted from the computer 50 has been read, and then sends a ready signal to the sensors 10A to 10C to recognize the next passing ball.

The computer 50 obtains the starting elevation angle and the starting direction of the ball from the information received through serial communication with the microprocessor 40. The method of obtaining the starting elevation and starting direction of the ball will be described with reference to FIGS. 6A-6C.

6A to 6C show the positions of the balls recognized by the sensors 10A to 10C.

In the present embodiment, the maximum recognizable angle of the sensors 10A to 10C ( ) Is an angle between the position 0 and the position 1022 of the sensor 10A to 10C. The installation angle of the first sensor 10A is the coordinate of the ball in the sensor 10A (0,0, ( The position information for recognizing)) is set to "511". The mounting angle of the second sensor 10B is the point on the z axis (0,0, ( When the ball in)) is recognized, its positional information is recognized as "511". The installation angle of the third sensor 10C is the point on the z axis (0,0, ( When the ball in)) is recognized, its positional information is recognized as "511". To Is the location information value recognized by the sensor, " Is a vertical lower end point (-Ws, 0, () in the second left sensor 10B as shown in FIG. The location information value to recognize the ball in)). As shown in FIG. 6C, the right third sensor 10C also has a point Ws, 0, ( Location information to recognize the ball in)) ) only, <511. " "Means that the second sensor 10B is z = ( Position information that identifies the ball in flight on a plane, "Means that the third sensor 10C is z = ( This is the location information of the ball that recognizes the ball in flight on the plane. " Is denoted by z = (in the first sensor 10A. Position information of the ball that recognizes the ball in flight on the plane, "Is the coordinate of the first sensor 10A (-Ws, 0, ( Location information to recognize the ball in)) <511). The position information recognition value of the sensor increases from the -x direction to the + x direction. The allowable range of sensor position information values is [0,1022]. The first sensor 10A is z = ( ) Coordinates in the plane ( Recognize the ball in the dot). The second sensor 10B is z = ( ) Coordinates in the plane ( Recognize the ball in the dot). The third sensor 10C is z = ( ) Coordinates in the plane ( Recognize the ball in the dot). Is the coordinate of the ball in the first sensor 10A ( ) And (0,0, ( Viewing angle) Is the point (-Ws, 0, ( )) And dots ( Is an angle between Is the point (Ws, 0, ( )) And dots ( Is the angle between).

Using the ball position values recognized by the two sensors 10B and 10C installed on the left and right sides, the ball passing point on the two-dimensional plane where the two sensors 10B and 10C are installed is calculated as follows.

First, z = (the left second sensor 10B recognizes a ball) The position coordinates of the ball on the plane ), And z = (that the right third sensor 10C recognizes the ball) The position coordinates of the ball on the plane ) Is as follows.

Thus, z = ( The coordinate of the ball on the plane ) Is expressed as

= (DB) / (AC)

= A * (DB) / (AC) + B

Where A = -tan (π / 2- ), B = Hs + A * Ws, C = tan (π / 2- ), And D = (Hs-C * Ws) * to be.

And Are each defined by Equation 2 below.

only, <511.

Here, when the left second sensor 10B and the right third sensor 10C are on the same z-axis, that is, ( ), Then D = (Hs-C * Ws). The positions of the left second sensor 10B and the right third sensor 10C are each a predetermined distance from the first sensor 10A. You can install it so that it is separated by The equation is the same, only affected by.

Using the position information of the ball recognized from the two linear sensors 10B and 10C as above, z = ( The coordinate of the ball in the plane ) To get the position.

Lower part of the first sensor 10A, that is, z = ( The position of the ball in the plane ) Is defined by the following equation (3).

only, Is the coordinate of the ball in the first sensor 10A ( ) And point (0,0, ( As an angle to see)), = atan (Ws / Hs) * (511- ) / (511- )to be.

As above, the starting point of the ball is (0,0, ), Two points through which the ball passes ( ) And ( The three points of the trajectory of the ball, etc., can be obtained first. Using these three points, the starting direction of the ball ( ) Is based on a vertical plane where x = 0 / ( Clockwise, tilted to the right, and the starting angle of the ball ( ) Is based on a horizontal plane with y = 0 / ( It's inclined up by)).

Z-axis velocity component of the ball ) And the starting direction of the ball ( ) And departure elevation ( Velocity component in the x, y, and z-axis directions starting at ) Can be obtained. This is defined by the following equation (4).

Therefore, the starting velocity of the ball can be obtained by square root of the velocity components in the x, y, and z-axis directions, which is expressed by Equation 5 below.

* SQRT (1+ )

In general, the positional information of the moving object on the earth, that is, the trajectory, is represented as a function affected by the starting speed, starting elevation, air resistance, and gravity acceleration. The variables needed to find the trajectory of the ball are defined as follows.

Ball starting speed Speed of the ball at time "t" , Air density (ρ), attraction constant of the sphere ( ), The cross section of the ball ( ), The mass of the ball (m), the random time interval ( Given that == Δt, the trajectory of the ball moving in three dimensions is given by

First, the x-axis acceleration of the ball at time "t" ( ) Means the ball moves in the + x direction ( > 0), when the ball travels on a plane with x = 0 ( = 0), and when the ball moves in the -x direction ( <0) is defined by the following equation (6).

=

= 0, when ,

=

That is, the x-axis acceleration of the ball at time "t" ( ) Is the air resistance acting in the opposite direction of the ball's travel.

The y-axis acceleration of the ball at time "t" ) Is when the ball rises ( > 0), when moving horizontally ( = 0), and on descent ( <0) is defined by the following equation (7).

That is, the y-axis acceleration of the ball ( ) Is simultaneously affected by the Earth's gravity and the air resistance in the direction of the Earth's gravity when the ball rises, and only by the Earth's gravity when the ball moves horizontally. When descending from the peak, it is simultaneously affected by the earth's gravity and air resistance in the opposite direction of the earth's gravity. Earth gravity always acts in the direction of the center of the earth, so it is always negative along the y axis.

Z-axis acceleration of the ball at time "t" ( ) Is the air resistance, which is negative as shown in Equation 8 below.

Velocity of the ball at time "t (t>0)" ) And the position of the ball ( ) Is defined by the following equation (9).

In this way, the trajectory of the ball over time can be obtained. In addition, the landing point of the ball At the time the value becomes "0" (t = k, k> 0) ) Point.

The computer 50 displays the movement of the ball three-dimensionally on the screen of the monitor 60 using the calculated trajectory of the ball. A three-dimensional depiction of the flight trajectory of the ball on the course of a golf course, and a side view showing the trajectory of the ball based on the direction of the ball by dividing the monitor 60 screen in a predetermined manner, and showing the starting position and the arrival point of the ball in a graphic manner. Show the floor plan together. The speed, direction, maximum altitude, and flight distance of the ball are expressed numerically.

A method of expressing the trajectories of the three-dimensional balls of x, y, and z obtained by the computer 50 on the two-dimensional plane of the monitor 60 will be described.

The coordinates of the ball at time "t" ( Coordinates of the ball represented by the projection plane ) Is calculated as in Equation 10 below.

Where Lp is the distance from the origin to the projection plane, Is the distance from the origin to the ball flight start point.

Since the photograph displayed on the monitor 60 is a separate plane that is completely different from the conventional coordinate system, the photograph width is Wp 'and the height is Hp', the horizontal is the x axis and the vertical is the y axis. Is defined as the bottom center. The four ear coordinates in the picture are (-Wp '/ 2, 0), (-Wp' / 2, Hp '), (Wp' / 2, 0), (Wp '/ 2, Hp'). The position of the ball at time "t" ( Coordinates of the points on the photo for ) Becomes the following Equation 11 (where (-Wp ′ / 2) <= <= (Wp ′ / 2), 0 <= <= Hp ').

Starting point of the ball (0,0, If the ball at) is represented on the photograph as the size of the diameter (Bp1 ′), then the coordinate ( The diameter (Bpt ′) of the ball in which the ball in the image is displayed on the photograph is expressed by the following equation (12).

In this way, the ball's starting speed and starting elevation can be used to determine the ball's flight trajectory and landing point, the ball's position on the projection plane, and the ball's position and size on the golf course foreground view from the viewpoint. Dimensional trajectory movement can be expressed in three dimensions on a two-dimensional plane.

The computer 50 expresses the trajectory of the three-dimensional ball as shown in FIG. 7 on the two-dimensional plane of the monitor 60 together with the golf course background photograph.

Referring to FIG. 7, the front view (A) representing the three-dimensional movement of the ball by dividing the screen of the monitor 60 into four areas, the plan view (B) representing the flight starting point and the landing point of the ball, and the distance of the ball The side view (C) representing the height of the star is placed in the divided area. That is, the plan view (B) is displayed on the left side of the screen, the side view (C) is displayed on the upper right side, and the flight of the ball with the background of the golf course course is displayed on the lower right side.

As shown in FIG. 8, the computer 50 expresses a trajectory according to the movement of the ball on the golf course course photograph in the "A" area of the monitor 60 screen, from the moment the ball starts to fly to the landing point where the ball falls to the ground. Three-dimensional representation of the flight of the ball over time. In addition, the speed of the ball, the highest reaching altitude, the starting direction and starting elevation, the ball's flight distance, etc. are displayed in numbers so that the user can easily know the result of the hit ball. In addition, if the ball falls on the green, the enlarged part of the picture is displayed again in a pop-up window, and the detailed landing point of the ball is displayed separately so that it is easy to see how far the ball has arrived from the hole cup. Help the user understand.

As shown in FIG. 9, the side view (C) shows the flight trajectory of the side view based on the direction in which the ball travels from the flight start point, that is, the side view based on the plane of x = 0. The horizontal axis represents the flight distance in the z direction, and the vertical axis represents the height in the y axis direction. In the side view, the height of the ball over time is represented by figures and numbers. In particular, the altitude and flight distance at the top of the ball are displayed on the screen.

The plan view (B) of the golf course viewed from the air as shown in Fig. 10 shows the starting point of the ball and the landing point of the ball as a picture. The flight distance of the ball is indicated by numbers.

On the other hand, golf course background is implemented by four distances of 100, 150, 200, 300 yards. The background consists of dozens of course pictures and floor plans for each distance. To reduce the monotony of batting, you can change the background photo periodically to practice. When the golfer operates the background image conversion switch 511 of the switch 51 to select the desired distance, the computer 50 switches the picture displayed on the monitor 60 as the background picture for the selected distance. At this time, the switch lamp 52 turns on a lamp corresponding to the selected distance.

As described above, the golf batting analyzer and analysis method using the linear sensor of the present invention, the speed of the ball, flight distance, direction by detecting the appearance of the golf ball flying within a distance of 6m after hitting the golf ball in the golf driving range , Calculate the initial angle, trajectory, and landing point, and show it on the screen in figures and numbers.In this case, three-dimensional graphics of the ball and the landing point are shown in detail with the background image of the golf course course. Make it easy to see the results of your analysis. In addition, when the ball is on-green, the area drawn around the hole cup is enlarged by using a pop-up window to show the point where the ball is dropped in more detail, thereby maximizing the efficiency of batting practice.

Claims (29)

In the equipment for the golf ball analysis of the golf practice range, Three linear sensors for recognizing the position of a flying golf ball; A sensor controller for driving control of the linear sensor; A microprocessor configured to send a ready signal to the linear sensor, receive position information of the ball from the linear sensor, calculate a speed in which the ball travels, and output the ball along with position information of the ball; Receiving the ball's heading direction and speed through serial communication with the microprocessor, calculating the ball's starting altitude, starting direction, and speed, and calculating the ball's trajectory and landing point from the ball and providing it as a batting analysis information. Computer for; And Golf batting analyzer using a linear sensor including a monitor for displaying the batting analysis information provided from the computer screen. 2. The golf ball analyzer using a linear sensor according to claim 1, comprising a ROM for storing microprocessor driving software for collecting and transmitting sensor data. 3. The three linear sensors of claim 1, wherein the three linear sensors are located at a coordinate system (x, y, z) in the horizontal (x-axis), vertical (y-axis), and the direction of travel (z-axis) of the ball from the starting point of the ball flight. (0, Hs, ( )) Branch, (-Ws, Hs, ( Branch), (Ws, Hs, ( At each point, where Hs is the height, 2Ws is the distance in the x-axis direction between the second and third of the three linear sensors, Is the distance from the origin (0,0,0) to the start of the ball flight in the z-axis direction, Is the distance from the start of the ball flight to the point of installation of the first of the three linear sensors, and And The golf ball hit analyzer using the linear sensor, characterized in that the distance on the z-axis between the first sensor and the remaining sensors. The golf ball analyzer using the linear sensor according to claim 1, wherein the linear sensor recognizes the position of the ball based on a brightness difference generated when the ball passes over the floor mat of the golf practice range. The method of claim 4, wherein the linear sensor A clock generator for generating a clock signal having a predetermined frequency; A counter that counts the generated clock signal and resets a count value each time a reset signal is applied from the sensor controller; A memory device comprising pixels and storing an intensity of light incident on a designated pixel according to a ball position as an electric signal; A random pixel address decoder for outputting a pixel address according to the count value; A pixel selection switch for selecting a pixel of the memory element corresponding to the pixel address and storing a signal of the pixel; And And a pixel reset switch for erasing a value stored in a pixel of a memory element whenever a clear signal is applied from the sensor controller. The method according to claim 5, wherein when the ball recognition ready signal is transmitted from the microprocessor, the linear sensor recognizes the ball position information by storing a high voltage at a corresponding pixel position due to the brightness difference generated by the ball passing. Golf ball analyzer using linear sensor. The method of claim 5, wherein the sensor controller counts a clock in synchronization with the counter of the linear sensor, and checks whether the count value reaches the number of pixels of the memory device and applies a reset signal to the linear sensor if the count value is reached. Golf batting analyzer using a linear sensor characterized in that. 8. The linear sensor as claimed in claim 7, wherein the sensor controller counts each time the reset signal is applied to the counter of the linear sensor, and applies a clear signal to the linear sensor when the count value reaches a preset value. Golf batting analyzer using the. 5. The golf ball analyzer using the linear sensor according to claim 3 or 4, wherein the microprocessor calculates a moving direction speed of the ball from a time difference recognized by two of the three linear sensors. 10. The method of claim 9, wherein the microprocessor is a distance between the first and second sensors of the three linear sensors ( ) And ball recognition time difference ( Starting velocity component (z-axis) from Golf batting analyzer using a linear sensor, characterized in that). = Of 11. The method of claim 10, wherein the computer is at the starting point (0, 0, ), Two points through which the ball passes ( ) And ( Starting direction of the ball from ) And departure elevation ( ), Starting direction of the ball ( ) Is based on a vertical plane where x = 0 Clockwise) Starting altitude of the ball ( ) Is based on a horizontal plane with y = 0 In a tilted up direction) From here = (DB) / (AC), = A * (DB) / (AC) + B, A = -tan (π / 2- ), B = Hs + A * Ws, C = tan (π / 2- ), And D = (Hs-C * Ws) * ego, , to, Golf batting analyzer using a linear sensor, characterized in that the position information value of the ball. 12. The computer program product of claim 11, wherein the computer obtains the x, y, z-axis velocity components of the ball at the start from the z-axis velocity component of the ball and the starting direction and starting elevation of the ball. A golf ball analyzer using a linear sensor, characterized by finding the trajectory and landing point of the ball. 13. The golf ball analyzer using the linear sensor according to claim 12, wherein the computer displays the flight trajectory of the ball on the background of a golf course photograph. The computer system according to claim 13, wherein the computer divides the monitor screen into predetermined areas, the side view representing the altitude by distance of the ball, the plan view expressing the flight starting point and the landing point of the ball, and the front side representing the three-dimensional movement of the ball. Golf batting analyzer using a linear sensor, characterized in that to display the picture divided into each area. 15. The golf ball analyzer using the linear sensor according to claim 14, wherein the computer displays the speed, direction, maximum altitude, and flight distance of the ball on the monitor as a number. 16. The golf ball analyzer using the linear sensor according to claim 15, wherein when the landing point of the ball is on the green, the computer shows an enlarged image of the green portion on the monitor in a pop-up form. The golf batting analyzer according to claim 13, further comprising a distance conversion switch to select a background of the golf course course photograph by distance. 18. The golf batting analyzer according to claim 17, further comprising a switch lamp for informing a lighting indication of the distance selected by the distance conversion switch. In the golf ball analysis method using a linear sensor, (1) recognizing the position of the ball in space through the linear sensor; (2) calculating a traveling direction starting speed component of the ball based on the time difference of the ball of the linear sensor; (3) calculating the starting elevation angle, the starting direction, the speed of the ball by using the recognized position information of the ball and the calculated speed of the traveling direction of the ball, and calculating the trajectory and the landing point of the ball by using the calculated information. Calculating analysis information; And (4) calculating the ball position and size on the projection plane according to the calculated trajectory of the ball and representing the trajectory of the three-dimensional ball three-dimensionally on a two-dimensional plane; Analytical Method. 20. The method of claim 19, wherein the step (1) generates a sensor ready signal and sends the signal to the linear sensor, and stores the recognized position value of the ball every time the movement of the ball is recognized by the linear sensor. Golf batting analysis method using a linear sensor characterized in that the number of times repeated to accumulate the position value of the ball to increase the discriminating power. The method of claim 20, wherein the step (1) is performed in a coordinate system of horizontal (x), vertical (y), and ball moving direction (z) according to the installation of the linear sensor, z = ( Coordinates in the plane () ) And z = ( Coordinates in the plane () ) Point and z = ( Coordinates in the plane () Recognizes the ball at the point and the two coordinate points ( )Wow ( ) The correlation between the golf ball hit analysis method using a linear sensor, characterized in that the following. The method of claim 21, wherein z = ( Coordinates in the plane () ) Is a golf ball analysis method using a linear sensor, characterized in that expressed as follows. = (DB) / (AC), = A * (DB) / (AC) + B Where A = -tan (π / 2- ), B = Hs + A * Ws, C = tan (π / 2- ), And D = (Hs-C * Ws) * ego, Is (-Ws, 0, ( )) And ( Angle between points, Is (Ws, 0, ( )) And ( The angle between the points. The angle of claim 22, wherein the angle of step (1) Wow Are each , Is defined as here, Is the location information of the ball, Is (-Ws, 0, ( )) Is a geolocation value that recognizes the ball at the point, Is z = ( Position information that identifies the ball in flight on the plane Is z = ( Golf batting analysis method using a linear sensor, characterized in that the position information value of the ball to recognize the ball in flight on the plane. 24. The method of claim 23, wherein step (3) comprises: the starting point of the ball (0,0, ), Two points through which the ball passes ( ) And ( Starting direction of the ball from ) And departure elevation ( ), Starting direction of the ball ( ) Is based on a vertical plane where x = 0 Clockwise) Starting altitude of the ball ( ) Is based on a horizontal plane with y = 0 Golf batting analysis method using a linear sensor, characterized in that the direction inclined upward. 25. The method according to claim 24, wherein said step (3) comprises: ) And the starting direction of the ball ( ) And departure elevation ( Velocity component in the x, y, z-axis starting at ) The golf ball analysis method using the linear sensor, characterized by the following formula. 26. The method according to claim 25, wherein step (3) comprises the x, y, z axis velocity components of the ball at ) Is a square root (SQRT) of the golf ball hitting method using a linear sensor, characterized in that the starting speed of the ball. 27. The method of claim 26, wherein the step (3) obtains the trajectory of the ball over time from the speed of the ball and the position of the ball at time "t". 28. The method according to claim 27, wherein step (4) comprises the coordinates of the ball at time " t " ) Is the coordinate of the ball represented on the projection plane by Golf batting analysis method using a linear sensor, characterized in that calculated by). Where Lp is the distance from the origin to the projection plane, Is the distance from the origin to the ball flight start point. 29. The method according to claim 28, wherein step (4) comprises the coordinates of the ball on the calculated projection plane ( ) Is the coordinate of the ball represented on the 2D screen Golf batting analysis method using a linear sensor characterized in that found. Here, Wp 'and Hp' are horizontal and vertical sizes of the two-dimensional screen.