WO2022260343A1 - Appareil de calcul de pente de green et procédé de fonctionnement d'appareil de calcul de pente de green - Google Patents

Appareil de calcul de pente de green et procédé de fonctionnement d'appareil de calcul de pente de green Download PDF

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Publication number
WO2022260343A1
WO2022260343A1 PCT/KR2022/007791 KR2022007791W WO2022260343A1 WO 2022260343 A1 WO2022260343 A1 WO 2022260343A1 KR 2022007791 W KR2022007791 W KR 2022007791W WO 2022260343 A1 WO2022260343 A1 WO 2022260343A1
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point
green
distance
calculating
width
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PCT/KR2022/007791
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English (en)
Korean (ko)
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이호형
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주식회사 브이씨
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Publication of WO2022260343A1 publication Critical patent/WO2022260343A1/fr

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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
    • A63B69/3691—Golf courses; Golf practising terrains having a plurality of driving areas, fairways, greens
    • 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
    • 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
    • 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
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T17/00—Three dimensional [3D] modelling, e.g. data description of 3D objects
    • G06T17/05—Geographic models
    • 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
    • A63B2071/0691—Maps, e.g. yardage maps or electronic maps
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B2102/00—Application of clubs, bats, rackets or the like to the sporting activity ; particular sports involving the use of balls and clubs, bats, rackets, or the like
    • A63B2102/32—Golf
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B2220/00—Measuring of physical parameters relating to sporting activity
    • A63B2220/18—Inclination, slope or curvature
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B2220/00—Measuring of physical parameters relating to sporting activity
    • A63B2220/20—Distances or displacements
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B2220/00—Measuring of physical parameters relating to sporting activity
    • A63B2220/70—Measuring or simulating ambient conditions, e.g. weather, terrain or surface conditions
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B2220/00—Measuring of physical parameters relating to sporting activity
    • A63B2220/80—Special sensors, transducers or devices therefor
    • A63B2220/806—Video cameras
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B2220/00—Measuring of physical parameters relating to sporting activity
    • A63B2220/80—Special sensors, transducers or devices therefor
    • A63B2220/89—Field sensors, e.g. radar systems

Definitions

  • the present disclosure relates to a green gradient calculator and an operating method of the green gradient calculator.
  • golf aids or programs that help play golf in the field or help improve performance have been developed and are used by many golfers. These devices provide golfers with various information, such as the distance from the golfer's current position to the hole, the gradient of the field, the expected trajectory of the ball, and displaying the corresponding course on the screen.
  • the golfer in the case of putting (Putting), the golfer must accurately grasp information such as the slope around the hole of the golf green and hit the golf ball with appropriate strength and direction. Since putting has a very large effect on the score, information around the hole is an important factor in a golf game.
  • Embodiments are intended to solve the above problems, and are intended to provide a green gradient calculator for measuring the slope of the green and an operation method of the green gradient calculator.
  • One embodiment according to the present disclosure is to provide green gradient information in real time.
  • One embodiment according to the present disclosure is to provide accurate green gradient information.
  • a method for calculating a gradient of a green includes measuring a first distance from a gradient calculating device to a first point on the green and a second distance from the gradient calculating device to a second point on the green; calculating a first height of the first point and a second height of the second point based on the first distance and the second distance; Calculating a first width from a line bisecting the observation angle formed by the first point and the second point to the first point, and a second width from the line bisecting the observation angle to the second point, and the first height and the second height calculating a measured gradient between the first point and the second point based on , the first width, and the second width.
  • the step of measuring the first distance to the first point and the second distance to the second point may be performed when the green gradient calculator transmits the first beam to the first point and then receives the reflected first beam. Measuring a first distance based on the time it takes, and determining a second distance based on the time it takes for the green gradient calculating device to receive the reflected second beam after transmitting the second beam to the second point. It may include a measuring step.
  • the observation angle of the green gradient calculation device is 2 ⁇
  • the step of calculating the first height of the first point and the second height of the second point is: Equation 1
  • It may include a step of calculating through, where h 1 is a first height, h 2 is a second height, l 1 is a first distance, l 2 may be a second distance.
  • the first width is the shortest distance between the line that bisects the observation angle of the green gradient calculator and the first point
  • the second width is the shortest distance between the line that bisects the observation angle of the green gradient calculator and the second point
  • the step of calculating the width and the second width is Equation 2 below
  • It may include a step of calculating through , where w 1 may be a first width, and w 2 may be a second width.
  • Equation 3 The step of calculating the measured slope ( ⁇ ) between the first point and the second point is expressed by Equation 3 below:
  • It may include a step of calculating through.
  • ⁇ can be the slope of the green slope calculation device itself.
  • An apparatus for calculating a slope of a green includes a sensing unit configured to measure a first distance to a first point on a green and a second distance to a second point on the green, and based on the first distance and the second distance, The first height of the first point and the second height of the second point are calculated, and based on the first distance and the second distance, the observation angle formed by the first point and the second point is divided into two halves based on the green gradient calculator.
  • the sensing unit measures the first distance based on the time required to receive the reflected first beam after transmitting the first beam to the first point, transmits the second beam to the second point, and then transmits the reflected first beam.
  • the second distance may be measured based on the time required to receive the two beams.
  • the observation angle of the green gradient calculation device is 2 ⁇ , and the control unit has the following Equation 1
  • the first width is the shortest distance between the line that bisects the observation angle of the green gradient calculator and the first point
  • the second width is the shortest distance between the line that bisects the observation angle of the green gradient calculator and the second point
  • the first width and the second width may be calculated through, where w 1 may be the first width and w 2 may be the second width.
  • the control unit is expressed by the following Equation 3
  • the sensing unit measures the gradient of the green gradient calculation device itself, and the control unit calculates the following Equation 4
  • Actual gradients from the first point to the second point may be calculated through , where ⁇ may be the gradient of the green gradient calculator itself.
  • a camera unit generating image information by capturing a green image including a first point and a second point; and an output unit overlaying an actual gradient on corresponding positions of the first and second points on the image information and outputting the image information. can do.
  • the apparatus for calculating the slope of the green according to the embodiment has an advantage in that golfers can acquire information on the slope of a desired green in real time.
  • the green slope calculation device has an advantage in that it can obtain accurate information about the slope of the green that changes depending on the location regardless of the slope of the green slope calculation device.
  • FIG. 1 is a block diagram schematically showing the configuration of a green gradient calculator according to the present disclosure.
  • FIG. 2 is a flowchart illustrating an operating method of a green gradient calculator.
  • FIG 3 is a side view of a green schematically illustrating a case in which a green slope calculator is disposed toward the ground.
  • FIG. 1 is a block diagram schematically showing the configuration of a green gradient calculator 1.
  • the green gradient calculator 1 includes a power supply unit 101, a sensing unit 103, a camera unit 105, a user input unit 107, a control unit 109, a memory unit 111, and an output unit 113. do.
  • the green slope calculation device 1 may be configured in the form of an attachment type such as a hat or a portable mobile type, but is not limited thereto.
  • the power supply unit 101 receives external power and/or internal power and supplies power to each component included in the green gradient calculator 1 .
  • the power supply unit 101 includes a battery, and the battery may be a built-in battery or a replaceable battery.
  • the sensing unit 103 includes an acceleration sensor 1031 for sensing the slope of the green gradient calculator 1 itself and an arbitrary measurement point on the green where the sensing unit 103 mounted on the green gradient calculator 1 is heading.
  • a ToF sensor 1033 for measuring a distance to may be included.
  • the measurement point may be at least one arbitrary location within a range that can be sensed by the sensing unit 103 .
  • the sensing unit 103 may be attached to at least one surface of the green gradient calculator 1 .
  • the acceleration sensor 1031 may acquire the degree of tilt of the green gradient calculator 1 .
  • the acceleration sensor 1031 may measure gravitational acceleration.
  • the acceleration sensor 1031 may be implemented by calculating an inclination using a rotation angle obtained by a gyroscope sensor in a vertical direction from a preset reference direction. When the angle is detected using the gyroscope sensor, the gradient is estimated by adding or subtracting the integration error.
  • the gyroscope sensor may obtain the amount of rotation by detecting rotation of the green gradient calculating device 1 .
  • the gyroscope sensor may be an optical, mechanical, or piezoelectric gyroscope sensor.
  • the acceleration sensor 1031 may express the detected acceleration as a vector value for three axes (X-axis, Y-axis, Z-axis), and the gyroscope may express the detected acceleration as a rotation vector value (roll (roll)) for the three axes. roll), pitch, and yaw).
  • the acceleration sensor 1031 and the gyro sensor may grasp the speed, position, and position change of the green gradient calculating device 1 .
  • the ToF sensor 1033 may obtain a distance from the green gradient calculator 1 to an arbitrary measurement point.
  • the ToF sensor 1033 may be a Laser Detection And Ranging (LADAR) sensor, a laser scanner, or a Light Detection And Ranging (LiDAR) sensor using a laser.
  • LADAR Laser Detection And Ranging
  • LiDAR Light Detection And Ranging
  • the ToF sensor 1033 emits light to a certain measuring point and detects reflected light reflected by the measuring point. Further, the distance to the measurement point is measured through a time difference between an emission timing at which the ToF sensor 1033 emits light and a detected detection timing.
  • the ToF sensor 1033 may obtain a distance to a measurement point by emitting a laser beam.
  • the sensing unit 103 may further include a gyroscope sensor separate from whether or not the azimuth sensor and the gyroscope sensor of the acceleration sensor 1031 described above are included. Meanwhile, the green gradient calculator 1 may combine and utilize information sensed by at least two or more of these sensors.
  • the azimuth sensor is a sensor that measures an azimuth angle, and may obtain a value of an azimuth angle toward which the green slope calculator 1 is heading.
  • the azimuth sensor may be a geomagnetic sensor that measures an azimuth by detecting a geomagnetic field.
  • the azimuth sensor may be implemented by calculating an azimuth using a rotation angle obtained by a gyroscope sensor in a left and right direction from a preset reference direction.
  • the sensing unit 103 may generate sensing information.
  • the sensing information may generate device inclination information about the inclination of the green inclination calculating device 1 and distance information in relation to a distance to an arbitrary point in the green.
  • the camera unit 105 may capture the green toward which the camera unit 105 mounted on the green gradient calculator 1 is facing.
  • the camera unit 105 may be located on the same surface as the surface to which the sensing unit 103 is attached in the green gradient device. Through this, the green direction sensed by the sensing unit 103 and the direction photographed by the camera unit 105 may be the same. Accordingly, the sensing unit 103 may sense the green captured by the camera unit 105 in order to obtain slope information of the green.
  • the camera unit 105 may generate image information about the green toward which the camera unit 105 is facing.
  • the control unit 109 can display image information generated by the camera unit 105 through the output unit 113, and also display both image information and sensing information through the output unit 113. may be
  • the user input unit 107 is for receiving information from a user. When information is input through the user input unit 107, the control unit 109 controls the operation of the gradient calculator 1 to correspond to the input information.
  • the user input unit 107 is a mechanical input means (or a mechanical key, for example, a button located on the front, rear, or side of the green slope calculator 1, a dome switch, a jog wheel) , jog switch, etc.) and a touch input means.
  • the user input unit 107 may receive a user input when a user touches a portion of the touch screen.
  • the user may select two arbitrary points suitable for measuring the slope of the green through the user input unit 107 .
  • the output unit 113 is for generating an output related to sight, hearing or touch.
  • the output unit 113 may include a sound output unit and/or a display unit.
  • the display unit is not limited thereto, and may be configured in various forms capable of outputting odors, vibrations, and the like.
  • the audio output unit may output audio data stored in the memory unit 111 as sound, and may be implemented in the form of a loudspeaker that outputs various alarm sounds or reproduction sounds of multimedia.
  • the sound output unit may inform the user of the slope of the green through sound.
  • the display unit includes a liquid crystal display (LCD), a thin film transistor-liquid crystal display (TFT LCD), an organic light-emitting diode (OLED), and an e-ink display. ) may include at least one of
  • the display unit may output image information generated by the camera unit 105 . Also, the display unit may output image information and sensing information together.
  • the green gradient calculator 1 may further include a communication unit for communicating with other user terminals through a network.
  • the output unit 113 may transmit image information and/or sensing information to the user terminal through the communication unit.
  • the user can check image information and/or sensing information through the user terminal.
  • the memory unit 111 stores data supporting various functions of the green gradient calculator 1 .
  • the data may include a calculation formula for calculating the slope of the green, an initially set observation value, a golf course tee box, fairway, hazard, bunker, rough, green, Course map information for the hole may be included.
  • the memory unit 111 may store firmware, application programs, data for operation of the green gradient calculator 1, and instructions.
  • the control unit 109 controls the overall operation of the green gradient calculator 1 .
  • the control unit 109 may provide or process appropriate information or functions to the user by processing signals, data, information, etc. input or output through the components described above or by running an application program stored in the memory unit 111. .
  • control unit 109 may control at least some of the components reviewed together with FIG. 1 in order to drive an application program stored in the memory unit 111 . Furthermore, the controller 109 may combine and operate at least two or more of the components included in the green gradient calculator 1 to drive the application program.
  • the controller 109 may guide the user to position the sensing unit 103 and/or the camera unit 105 toward a green whose gradient is to be determined. Accordingly, the user may arrange the gradient calculator 1 so that the sensing unit 103 and/or the camera unit 105 face the hole.
  • control unit 109 may request the user to select two arbitrary points suitable for measuring the slope on the green.
  • the user may select two arbitrary points on the green displayed on the output unit 113 through the user input unit 107 .
  • the observation angle may be an angle between two points selected by the user and the device. If the observation angle is a preset value in the green gradient calculating device 1, the control unit 109 may determine two points at which an angle formed between two arbitrary points and the device has the observation angle.
  • the controller 109 may calculate a green gradient between two points. This will be described in detail with reference to FIGS. 2 and 3 below.
  • the controller 109 may output the calculated gradient through the output unit 113 .
  • the control unit 109 may output an actual gradient by overlaying the image information generated by the camera unit 105 on a corresponding position.
  • the controller 109 may continuously calculate the slope of the green in the direction the sensing unit 103 is facing. .
  • FIG. 2 is a flow chart showing an operation method of the green gradient calculator 1
  • FIG. 3 is a green gradient calculator 1 on a green when the sensing unit 103 of the green gradient calculator 1 is disposed toward the ground. ), a first point, and a side view schematically showing the second point.
  • the green gradient calculator 1 may be located at O, the first point may be located at A, and the second point may be located at B.
  • O, A, and B may all be located on the XZ plane.
  • it is located between the first point and the second point, and the angle formed by each ⁇ AOB, that is, the point where the line that bisects the observation angle and the line passing through the first and second points is called the midpoint, where C can be located in
  • the observation angle is described as 2 ⁇ .
  • the green gradient calculator 1 measures the distance l 1 to the first point and the distance l 2 to the second point (S201).
  • the first point and the second point may be any two points input to the green gradient calculating device 1 .
  • the first point and the second point may be any point on the ground around the hole, but are not limited thereto, and may be any two points on the green.
  • the observation angle may be an angle between the first point and the second point and the device. If the observation angle is a preset value in the green gradient calculation device 1, any two points may determine the two points at which the angle formed by the device has the observation angle.
  • the ToF sensor 1033 transmits a first beam to a first point A, and then transmits a first beam reflected from the first point A to the first point A and the ToF sensor 1033.
  • the distance between them (l 1 ) can be measured.
  • the ToF sensor 1033 may measure the distance (l 1 ) between the first point and the green gradient calculator 1 through the difference between the time at which the first beam is transmitted and the time at which the reflected first beam is received. have.
  • the ToF sensor 1033 transmits the second beam to the second point B to measure the distance to the second point B, and then transmits the second beam reflected from the second point B to the second point B.
  • a distance l 2 between point B and the ToF sensor 1033 may be measured.
  • the ToF sensor 1033 may measure the distance (l 2 ) between the second point and the ToF sensor 1033 through a difference between a time at which the second beam is transmitted and a time at which the reflected second beam is received.
  • the measurement of the distance to the first point and the measurement of the distance to the second point of the ToF sensor 1033 may be simultaneously performed, but are not limited thereto.
  • the relative height (h 1 ) of the first point and the relative height (h 2 ) of the second point are calculated (S203).
  • the observation angle between the first point A and the second point B may be 2 ⁇ .
  • Both the first point A and the second point B may be arbitrary points located on the surface of the green. Therefore, the first point calculated through the distance between the first point A and the green slope calculator 1 and the distance between the second point B and the green slope calculator 1 measured in step S201.
  • the respective heights of the points A and the second points B may be absolute values such as altitudes, but where the first points A and the second points B are located based on the green slope calculation device 1 may be a relative value of
  • the controller 109 may calculate the relative height h 1 of the first point A and the relative height h 2 of the second point A according to Equation 1 below.
  • the shortest distance (W 1 ) between the first point and the line bisecting the observation angle 2 ⁇ of the green gradient calculator 1 and the shortest distance (W 2 ) between the second point are calculated (S205).
  • control unit 109 calculates the shortest width (W 1 ) between a line bisecting the observation angle 2 ⁇ of the green gradient calculator 1 and the first point and the shortest width (W 2 ) between the second point by the following mathematical formula: It can be calculated through Equation 2.
  • the green gradient calculator 1 calculates the measured gradient ⁇ between the first point and the second point (S207).
  • the controller 109 may calculate the measured gradient ⁇ between the first point A and the second point B according to Equation 3 below.
  • the green slope calculation device 1 measures the slope after the user carries the green slope calculation device 1 and points it toward the desired green to be measured, this considers the slope of the green slope calculation device 1 itself.
  • the green slope between the first point A and the second point B, which is not drawn, may be a relative slope with respect to the calculating device 1 . Therefore, the slope at the point O where the slope calculator 1 is located must be reflected.
  • the green gradient calculating device 1 calculates the actual gradient in consideration of the gradient ⁇ of the green gradient measuring device (S209).
  • controller 109 may calculate the gradient between the first point and the second point through Equation 4 below.
  • the gradient ⁇ of the green gradient calculation device 1 itself may be acquired through the acceleration sensor 1031 in the device.
  • the acceleration sensor 1031 may measure the inclination ⁇ of the green gradient calculator 1 at the moment of measuring the first distance l 1 and the second distance l 2 .
  • the controller 109 subtracts the slope ⁇ of the slope calculation device 1 itself drawn from the measured slope ⁇ between the first point A and the second point B calculated according to Equation 3 above. As a result, the actual gradient between the first point (A) and the second point (B) can be calculated.
  • the controller 109 may calculate the actual gradient between two arbitrary points through the distance to two arbitrary points on the green and the observation angle between the device and the two points.
  • An apparatus for calculating a slope of a green according to the present disclosure has an advantage in that a slope of a point of interest can be easily obtained without actually measuring a distance on the green.
  • An apparatus for calculating a slope of a green according to the present disclosure has an advantage in that the slope between two arbitrary points on the green can be known only by the distance between two arbitrary points on the green without complicated calculation.
  • the embodiments described above may be implemented in the form of a computer program that can be executed on a computer through various components, and such a computer program may be recorded on a computer-readable medium.
  • the medium is a magnetic medium such as a hard disk, a floppy disk and a magnetic tape, an optical recording medium such as a CD-ROM and a DVD, a magneto-optical medium such as a floptical disk, and It may include hardware devices specially configured to store and execute program instructions, such as ROM, RAM, flash memory, and the like.

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Abstract

Selon un mode de réalisation, un procédé de calcul d'une pente d'un green comprend les étapes consistant : à mesurer, à partir d'un appareil de calcul de pente de green, une première distance jusqu'à un premier point situé sur un green et une seconde distance jusqu'à un second point situé sur le green ; à calculer une première hauteur du premier point et une seconde hauteur du second point ; à calculer une première largeur entre le premier point et une bissectrice coupant en deux l'angle observé de l'appareil de calcul de la pente du green par rapport au premier point et au second point, et une seconde largeur entre le second point et la bissectrice ; et à calculer une pente mesurée entre le premier point et le second point.
PCT/KR2022/007791 2021-06-08 2022-05-31 Appareil de calcul de pente de green et procédé de fonctionnement d'appareil de calcul de pente de green WO2022260343A1 (fr)

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KR1020210074197A KR20220165493A (ko) 2021-06-08 2021-06-08 그린 경사도 계산 장치 및 그린 경사도 계산 장치의 동작 방법
KR10-2021-0074197 2021-06-08

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014196731A1 (fr) * 2013-06-05 2014-12-11 Oh Jin Woo Dispositif servant à mesurer l'inclinaison d'un green dans un parcours de golf
KR20160071618A (ko) * 2014-12-12 2016-06-22 주식회사 알천텍 골프 필드의 그린 경사도를 검출하는 방법
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KR101698007B1 (ko) * 2016-06-16 2017-01-19 오진우 골프장 그린의 비접촉식 측정장치
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