EP2388048A1 - Ball movement path measuring method - Google Patents
Ball movement path measuring method Download PDFInfo
- Publication number
- EP2388048A1 EP2388048A1 EP10163267A EP10163267A EP2388048A1 EP 2388048 A1 EP2388048 A1 EP 2388048A1 EP 10163267 A EP10163267 A EP 10163267A EP 10163267 A EP10163267 A EP 10163267A EP 2388048 A1 EP2388048 A1 EP 2388048A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- data
- force
- time
- xyz
- movement path
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
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Classifications
-
- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B43/00—Balls with special arrangements
-
- 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
- A63B2024/0028—Tracking the path of an object, e.g. a ball inside a soccer pitch
- A63B2024/0034—Tracking the path of an object, e.g. a ball inside a soccer pitch during flight
-
- 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
- A63B2220/40—Acceleration
-
- 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
- A63B2220/83—Special sensors, transducers or devices therefor characterised by the position of the sensor
- A63B2220/833—Sensors arranged on the exercise apparatus or sports implement
Definitions
- the present invention relates to a method for measuring the movement path of an object and more particularly, to a ball movement path measuring method.
- an immovable measuring reference when wishing to know the movement path of an object such as golf ball or baseball ball that experiences a force during a ball game training or measurement, an immovable measuring reference must be established.
- the ball may be set in an apparatus that has a fixed measuring axis.
- US6,551,194 entitled “Captive ball golf practice tee with three-dimension velocity and two-axis spin measurement” teaches measurement of movement and rotation of ball caused by a force by means of a fixed measuring axis.
- This measuring method can obtain some basic data required.
- the fixed measuring axis limits the degree of freedom of the ball when the ball experiences a force.
- the measured data may be deviated from the possible condition of movement when the ball experienced a force.
- the present invention has been accomplished under the circumstances in view. It is the main object of the present invention to provide a ball movement path measuring method, which enables the object to move freely when experiences a force, thereby obtaining the data of XYZ acceleration data, XYZ vector components of force and torsion force relative to each of XYZ axes that are close to the actual condition of movement of the object.
- a ball movement path measuring method comprises the steps of preparing an operating unit and a measurement unit, the operating unit being an electronic apparatus having computing and display functions, the operating unit having stored in a memory therein the weight and size data of the object to be measured, the measurement unit being a triaxial accelerometer connectable to the operating unit and adapted for transmitting the measured data to the operating unit; mounting the triaxial accelerometer in the object to be measured for enabling the triaxial accelerometer to define XYZ triaxial space coordinates; obtaining the data of a initial position of the XYZ axes at a first measuring time and transmitting the data to the operating unit, and then obtaining the data of a reference position of the XYZ axes at at least one second measuring time and then transmitting the data to the operating unit; comparing the reference position to the initial position and calculating the XYZ acceleration data and the XYZ vector components of force and the torsion force relative to each of the XYZ axes after receipt of force subject
- ball movement path measuring method in accordance with the present invention comprises the steps as follows:
- the triaxial accelerometer C is set in the object O to be measured, as shown in Fig. 1 .
- the triaxial accelerometer C is located on the center of gravity of the object O.
- the triaxial accelerometer C is moved or rotated, its internal microstructure is changed, causing a capacitance variation, which is then converted into a specific output voltage signal for output.
- the triaxial accelerometer C defines XYZ triaxial space coordinates, as shown in FIG. 1 . Because the triaxial accelerometer C is fixedly mounted in the object O , the generation of the XYZ triaxial space coordinates defines the positions of different parts of the object O in the space.
- the timeline positions of the first measuring time and the second measuring time and the length of time between the first measuring time and the second measuring time can be determined subject to different settings.
- the first measuring time can be set at a time point prior to the object experienced an external force
- the second measuring time can be set at 0.5 second after the object experiences an external force.
- first measuring time can be set at 0.1 second after the object experienced an external force
- the second measuring time can be set at 0.5 second after the object experienced an external force.
- the setting of the predetermined length of time can be the data measured from the start point till the end point of a predetermined length of time started from the time moment the object is stricken by a force. For example, measure the start position before the object experiences a force, and then measure the reference position 0.5 second after the object experienced a force. Alternatively, it can measure the data continuously after the object experienced a force.
- the first measuring time can be a time point before the object experiences a force and the second measuring time can be any time point 0.1 second after the object experienced a force, or, the first measuring time can be a time point before the object experiences a force and the second measuring time, third measuring time and etc.
- the measurement at the second measuring time, third measuring time and etc. can be performed five times at a time interval of 0.02 second within the length of time 0.1 second.
- the triaxial accelerometer C can be connected to a connection line through a connection port B thereof to obtain the necessary working power from an external power source and to output the measured data.
- the triaxial accelerometer C can be made having a built-in battery and adapted for outputting the measured data by a wireless transmission method.
- the acceleration, flight path, flight duration, and direction and angle of rotation can be obtained through a computation.
- the measuring method of the present invention eliminates the problem of a fixed measuring axis i.e., eliminates the factors that limit free movement of the object. Further, it is not necessary to reposition the object and to reset the reference position upon each calculation.
- the measuring method of the present invention can obtain data close to the actual movement of the object, assuring high accuracy of evaluation of the acceleration, flight path, flight duration and angle and direction of rotation of the object when the object experiences a force.
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- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Physical Education & Sports Medicine (AREA)
- Force Measurement Appropriate To Specific Purposes (AREA)
Abstract
A ball movement path measuring method includes the steps of: preparing an operating unit and a measurement unit, mounting the triaxial accelerometer (C) in the object (O) to be measured for enabling the triaxial accelerometer (C) to define XYZ triaxial space coordinates, obtaining the data of a initial position of the XYZ axes at a first measuring time and the data of a reference position of the XYZ axes at a second measuring time and transmitting the obtained data to the operating unit, and comparing the reference position to the initial position and calculating the XYZ acceleration data, XYZ vector components of force and torsion force relative to each of XYZ axes after receipt of force subject to the contained angle between the coordinates data of the reference position and the coordinate data of the initial position and then using the XYZ acceleration data and the data of the weight and size of the object (O) to calculate the force experienced by the object (O), initial velocity, flight duration, flight height, flight distance and/or rotation speed.
Description
- The present invention relates to a method for measuring the movement path of an object and more particularly, to a ball movement path measuring method.
- Normally, when wishing to know the movement path of an object such as golf ball or baseball ball that experiences a force during a ball game training or measurement, an immovable measuring reference must be established. In this case, the ball may be set in an apparatus that has a fixed measuring axis. For example,
US6,551,194 , entitled "Captive ball golf practice tee with three-dimension velocity and two-axis spin measurement" teaches measurement of movement and rotation of ball caused by a force by means of a fixed measuring axis. This measuring method can obtain some basic data required. However, the fixed measuring axis limits the degree of freedom of the ball when the ball experiences a force. Thus, the measured data may be deviated from the possible condition of movement when the ball experienced a force. - The present invention has been accomplished under the circumstances in view. It is the main object of the present invention to provide a ball movement path measuring method, which enables the object to move freely when experiences a force, thereby obtaining the data of XYZ acceleration data, XYZ vector components of force and torsion force relative to each of XYZ axes that are close to the actual condition of movement of the object.
- To achieve this and other objects of the present invention, a ball movement path measuring method comprises the steps of preparing an operating unit and a measurement unit, the operating unit being an electronic apparatus having computing and display functions, the operating unit having stored in a memory therein the weight and size data of the object to be measured, the measurement unit being a triaxial accelerometer connectable to the operating unit and adapted for transmitting the measured data to the operating unit; mounting the triaxial accelerometer in the object to be measured for enabling the triaxial accelerometer to define XYZ triaxial space coordinates; obtaining the data of a initial position of the XYZ axes at a first measuring time and transmitting the data to the operating unit, and then obtaining the data of a reference position of the XYZ axes at at least one second measuring time and then transmitting the data to the operating unit; comparing the reference position to the initial position and calculating the XYZ acceleration data and the XYZ vector components of force and the torsion force relative to each of the XYZ axes after receipt of force subject to the contained angle between the coordinates data of the reference position and the coordinate data of the initial position, and then using the XYZ acceleration data and the data of the weight and size of the object to calculate the force experienced by the object.
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FIG 1 is a schematic drawing showing the relationship between a triaxial accelerometer and XYZ space coordinates in accordance with the present invention. -
FIG. 2 is a schematic drawing showing the relationship between the absolute coordinates and the relative coordinates in accordance with the present invention. -
FIG. 3 is a schematic oblique elevation, showing the relationship between the absolute coordinates and the relative coordinates in accordance with the present invention. - Referring to
FIGS. 1∼3 , ball movement path measuring method in accordance with the present invention comprises the steps as follows: - At first, prepare an operating unit and a measurement unit. The operating unit can be a computer, PDA, cell phone or any electronic device having calculation and display functions. Further, the operating unit comprises a memory that has stored therein weight and size data of the object O to be measured. The measurement unit is a triaxial accelerometer C connectable to the operating unit by a wired communication method. Alternatively, the triaxial accelerometer C of the measurement unit can be equipped with a battery and connectable to the operating unit by a wireless communication method.
- Thereafter, set the triaxial accelerometer C in the object O to be measured, as shown in
Fig. 1 . Preferably, the triaxial accelerometer C is located on the center of gravity of the object O. When the triaxial accelerometer C is moved or rotated, its internal microstructure is changed, causing a capacitance variation, which is then converted into a specific output voltage signal for output. The triaxial accelerometer C defines XYZ triaxial space coordinates, as shown inFIG. 1 . Because the triaxial accelerometer C is fixedly mounted in the object O, the generation of the XYZ triaxial space coordinates defines the positions of different parts of the object O in the space. - Thereafter, obtain the data of the initial position of the XYZ axes at the first measuring time where the coordinate data of the initial position of the XYZ axes is obtained before the object O experiences a force when the measuring time is zero and then the obtained data is transmitted to the operating unit. And then, obtain the data of a reference position of the XYZ axes at at least one second measuring time. A predetermined length of time after the object O experienced a force, the position XYZ is changed, for example, moved to the position X'Y'Z', as indicated by the imaginary line in
FIG. 1 . Measure the position X'Y'Z' at this second measuring time to obtain the data of this reference position of the XYZ axes, and then transmit the measured data to the operating unit. The length of time between the first measuring time and the second measuring time is determined subject to a predetermined setting. - Thereafter, compare the reference position X'Y'Z' to the initial position XYZ, and calculate XYZ acceleration data and XYZ vector components of force and the torsion force relative to each of XYZ axes after receipt of force subject to the contained angle between the coordinates data of the reference position X'Y'Z' and the coordinate data of the initial position XYZ. Based on the XYZ acceleration data and the basic reference data of the weight and size of the object O, the force experienced by the object O and the initial velocity are obtained by the second law of motion, i.e., a body experiencing a force F experiences an acceleration a related to F by F = m a, where m is the mass of the object O. Based on the initial velocity, we can obtain the data of: flight duration (t =
- According to the present invention, the timeline positions of the first measuring time and the second measuring time and the length of time between the first measuring time and the second measuring time can be determined subject to different settings. For example, the first measuring time can be set at a time point prior to the object experienced an external force, and the second measuring time can be set at 0.5 second after the object experiences an external force. Alternatively, first measuring time can be set at 0.1 second after the object experienced an external force, and the second measuring time can be set at 0.5 second after the object experienced an external force.
- The setting of the predetermined length of time can be the data measured from the start point till the end point of a predetermined length of time started from the time moment the object is stricken by a force. For example, measure the start position before the object experiences a force, and then measure the reference position 0.5 second after the object experienced a force. Alternatively, it can measure the data continuously after the object experienced a force. For example, the first measuring time can be a time point before the object experiences a force and the second measuring time can be any time point 0.1 second after the object experienced a force, or, the first measuring time can be a time point before the object experiences a force and the second measuring time, third measuring time and etc. can be the time points of equal time interval within a predetermined length of time after the object experienced a force. For example, the measurement at the second measuring time, third measuring time and etc. can be performed five times at a time interval of 0.02 second within the length of time 0.1 second.
- The triaxial accelerometer C can be connected to a connection line through a connection port B thereof to obtain the necessary working power from an external power source and to output the measured data. Alternatively, the triaxial accelerometer C can be made having a built-in battery and adapted for outputting the measured data by a wireless transmission method.
- Subject to the data measured, the acceleration, flight path, flight duration, and direction and angle of rotation can be obtained through a computation. The measuring method of the present invention eliminates the problem of a fixed measuring axis i.e., eliminates the factors that limit free movement of the object. Further, it is not necessary to reposition the object and to reset the reference position upon each calculation. The measuring method of the present invention can obtain data close to the actual movement of the object, assuring high accuracy of evaluation of the acceleration, flight path, flight duration and angle and direction of rotation of the object when the object experiences a force.
Claims (10)
- A ball movement path measuring method, being characterized in comprising the steps of:preparing an operating unit and a measurement unit, said operating unit being an electronic apparatus having computing and display functions, said operating unit having stored in a memory therein the weight and size data of the object (O) to be measured, said measurement unit being a triaxial accelerometer (C) connectable to said operating unit and adapted for transmitting the measured data to said operating unit;mounting said triaxial accelerometer (C) in the object (O) to be measured for enabling said triaxial accelerometer (C) to define XYZ triaxial space coordinates;obtaining the data of a initial position of the XYZ axes at a first measuring time and transmitting the data to said operating unit, and then obtaining the data of a reference position of the XYZ axes at at least one second measuring time and then transmitting the data to said operating unit;comparing the reference position to the initial position and calculating the XYZ acceleration data after receipt of force subject to the contained angle between the coordinates data of the reference position and the coordinate data of the initial position, and then using the XYZ acceleration data and the data of the weight and size of the object (O) to calculate the force experienced by the object (O).
- The ball movement path measuring method as claimed in claim 1, being characterized in that the time points of said first measuring time and said at least one second measuring time is within the start point and end point of a predetermined length of time after said object (O) experienced a force.
- The ball movement path measuring method as claimed in claim 1, being characterized in that the time point of said first measuring time is a time point before said object (O) experiences a force; the time point of each said second measuring time is a time point after said object (O) experienced a force.
- The ball movement path measuring method as claimed in claim 1, being characterized in that the time point of said first measuring time is a time point after a first predetermined length of time after said object (O) experienced a force; the time point of each said second measuring time is a time point after a second predetermined length of time started after said first predetermined length of time.
- The ball movement path measuring method as claimed in claim 1, being characterized in that said triaxial accelerometer (C) comprises a connection port (B) connected to a connection line set and adapted for obtaining the necessary working power from an external power source and outputting measured data.
- The ball movement path measuring method as claimed in claim 1, being characterized in that said triaxial accelerometer (C) has a built-in battery and configured to output measured data wirelessly.
- The ball movement path measuring method as claimed in claim 1, being characterized in that said triaxial accelerometer (C) is configured to use the measured XYZ acceleration data and the basic reference data of the weight and size of said object (O) for calculating at least one of the data of initial velocity, flight duration, flight height, flight distance and rotation speed.
- The ball movement path measuring method as claimed in claim 1, being characterized in further calculating the XYZ vector components of force to calculate the force experienced by the object (O).
- The ball movement path measuring method as claimed in claim 8, being characterized in further calculating the torsion force relative to each of the XYZ axes to calculate the force experienced by the object (O).
- The ball movement path measuring method as claimed in claim 1, being characterized in further calculating the torsion force relative to each of the XYZ axes to calculate the force experienced by the object (O).
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP10163267A EP2388048A1 (en) | 2010-05-19 | 2010-05-19 | Ball movement path measuring method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP10163267A EP2388048A1 (en) | 2010-05-19 | 2010-05-19 | Ball movement path measuring method |
Publications (1)
Publication Number | Publication Date |
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EP2388048A1 true EP2388048A1 (en) | 2011-11-23 |
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ID=42931961
Family Applications (1)
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EP10163267A Withdrawn EP2388048A1 (en) | 2010-05-19 | 2010-05-19 | Ball movement path measuring method |
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ITMI20130059A1 (en) * | 2013-01-17 | 2014-07-18 | Laser Navigation S R L | PLAYING BALL WITH ELECTRONIC CIRCUIT |
CN113040757A (en) * | 2021-03-02 | 2021-06-29 | 江西台德智慧科技有限公司 | Head posture monitoring method and device, head intelligent wearable device and storage medium |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6551194B2 (en) | 1999-06-29 | 2003-04-22 | Earl Leon Hammerquist | Captive ball golf practice tee with three-dimension velocity and two-axis spin measurement |
FR2885816A1 (en) * | 2005-05-18 | 2006-11-24 | Daniel Boschat | Golf ball trajectory analyzing device, for bio feedback, has sensor module determining instantaneous positions and displacement of golf ball with respect to selected starting point and time |
US20070059675A1 (en) * | 2005-07-29 | 2007-03-15 | Udo Kuenzler | Device and method for measuring a rotational frequency of a movable game device |
DE102006013732A1 (en) * | 2005-11-25 | 2007-07-19 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Sensor module for use in e.g. golf ball, has sensor unit formed for outputting electrical signal in dependence of specified measured variable, and signal processing unit connected with sensor unit |
US20070178967A1 (en) * | 2005-01-28 | 2007-08-02 | Outland Research, Llc | Device, system and method for football catch computer gaming |
GB2440510A (en) * | 2006-08-04 | 2008-02-06 | Parm Sangha | Exercise article |
US20090029754A1 (en) * | 2007-07-23 | 2009-01-29 | Cybersports, Inc | Tracking and Interactive Simulation of Real Sports Equipment |
-
2010
- 2010-05-19 EP EP10163267A patent/EP2388048A1/en not_active Withdrawn
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6551194B2 (en) | 1999-06-29 | 2003-04-22 | Earl Leon Hammerquist | Captive ball golf practice tee with three-dimension velocity and two-axis spin measurement |
US20070178967A1 (en) * | 2005-01-28 | 2007-08-02 | Outland Research, Llc | Device, system and method for football catch computer gaming |
FR2885816A1 (en) * | 2005-05-18 | 2006-11-24 | Daniel Boschat | Golf ball trajectory analyzing device, for bio feedback, has sensor module determining instantaneous positions and displacement of golf ball with respect to selected starting point and time |
US20070059675A1 (en) * | 2005-07-29 | 2007-03-15 | Udo Kuenzler | Device and method for measuring a rotational frequency of a movable game device |
DE102006013732A1 (en) * | 2005-11-25 | 2007-07-19 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Sensor module for use in e.g. golf ball, has sensor unit formed for outputting electrical signal in dependence of specified measured variable, and signal processing unit connected with sensor unit |
GB2440510A (en) * | 2006-08-04 | 2008-02-06 | Parm Sangha | Exercise article |
US20090029754A1 (en) * | 2007-07-23 | 2009-01-29 | Cybersports, Inc | Tracking and Interactive Simulation of Real Sports Equipment |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ITMI20130059A1 (en) * | 2013-01-17 | 2014-07-18 | Laser Navigation S R L | PLAYING BALL WITH ELECTRONIC CIRCUIT |
CN113040757A (en) * | 2021-03-02 | 2021-06-29 | 江西台德智慧科技有限公司 | Head posture monitoring method and device, head intelligent wearable device and storage medium |
CN113040757B (en) * | 2021-03-02 | 2022-12-20 | 江西台德智慧科技有限公司 | Head posture monitoring method and device, head intelligent wearable device and storage medium |
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