WO2019088282A1

WO2019088282A1 - Sensor-embedded ball, and system

Info

Publication number: WO2019088282A1
Application number: PCT/JP2018/040973
Authority: WO
Inventors: 純也堤; 剛志伊藤; 滋夫藤崎; 芳夫國吉
Original assignee: 株式会社アクロディア
Priority date: 2017-11-06
Filing date: 2018-11-05
Publication date: 2019-05-09
Also published as: US20200353318A1; JP2019084009A

Abstract

The present invention provides a sensor-embedded ball. Provided is a ball including: a first sensor that includes a multi-axis acceleration sensor; a first communication unit that wirelessly transmits sensor data detected by the first sensor; and a battery that supplies electric power to the first sensor and the first communication unit. The first sensor includes a first multi-axis acceleration sensor that is stored at an expected center of gravity of the ball, and the first communication unit and the battery are disposed at positions displaced from the expected center of gravity.

Description

Ball with built-in sensor, and system

The present invention relates to a system including a ball incorporating a sensor.

Patent Document 1 discloses a ball incorporating a first sensor including a three-axis acceleration sensor and the like, and including a first communication unit wirelessly transmitting sensor data detected by the first sensor. A system is disclosed having a mobile terminal including a second communication unit paired with a first communication unit. The portable terminal has a unit for acquiring external information indicating an environment in which the paired ball moves alone, and sensor data of the paired ball obtained through the first communication unit and the second communication unit. And a unit that generates ball movement data of a paired ball in association with external information.

International Publication 2017/131133

There is a need for a system that can detect and record the movement of a ball easily and accurately. In order to accurately detect the movement of the ball, it is conceivable to incorporate hardware including various sensors, but in addition to the sensors, it is necessary to also incorporate control devices and batteries for operating them in the ball. There is weight, placed in consideration of balance.

One aspect of the present invention is a first sensor including a multi-axis acceleration sensor, a first communication unit wirelessly transmitting sensor data detected by the first sensor, a first sensor, and a first communication. And a battery that provides power to the unit. In this ball, the first sensor includes a first multi-axis acceleration sensor housed at the gravity center predetermined position of the ball, and the first communication unit and the battery are arranged at a position deviated from the gravity center predetermined position There is.

In a rotating body such as a ball, it is easy to reduce the influence on rotational performance by preferentially placing a heavy object such as a battery at the center of gravity. Therefore, when an acceleration sensor is built in the ball, the acceleration sensor is disposed at a position deviated from the center of gravity, and when the ball rotates during flight, acceleration due to centrifugal force becomes noise and acceleration of flight motion is often buried in noise . Therefore, the inventors of the present application have found that the data of the acceleration sensor can not be effectively used to analyze the movement of the ball in flight. The number of revolutions and the rotational axis during flight can be obtained by analyzing the data of multi-axis magnetic sensors as disclosed in Patent Document 1, but if the acceleration of the flight motion can not be obtained, the flight It is also difficult to determine the distance accurately.

In the ball of the present invention, the battery and the first communication unit are removed from the gravity center planned position, and the multi-axis acceleration sensor is arranged at the gravity center planned position to suppress the influence of the centrifugal force and data including the acceleration of the flight movement. Make it possible to obtain The battery, the board, etc. are placed near the planned center of gravity in a dispersed or symmetrical position with respect to the planned center of gravity, or the battery is divided into a plurality of small and arranged similarly, or one or more counter weights By arranging the same, it is possible to suppress the influence on the rotational performance of the ball. By arranging the multi-axis acceleration sensor at the gravity center predetermined position, it is possible to suppress the influence of the centrifugal force and easily obtain the acceleration of the flight movement from the data of the first multi-axis acceleration sensor.

In a ball having a core body made of rubber, cork, foam polystyrene, etc., which forms the central portion of the ball, the first sensor, the first communication unit and the battery may be incorporated in the core body, or a mold (resin It may be enclosed by).

The first sensor may include a plurality of second multi-axis acceleration sensors disposed adjacent to the first multi-axis acceleration sensor disposed at the gravity center predetermined position. In the manufacturing process, the planned center of gravity position may slightly shift (shift) from the design. In addition, due to slight deformation of the ball during flight, data from the first multi-axis acceleration sensor may have a large effect of centrifugal force. By arranging a plurality of second multi-axis acceleration sensors in the vicinity of the expected center of gravity position, data of the sensor having the least influence of centrifugal force can be used or data obtained simultaneously from a plurality of acceleration sensors around the center of gravity It is possible to remove noise components due to centrifugal force. The plurality of second multi-axis acceleration sensors may be arranged such that the first multi-axis acceleration sensor is at the body-centered position. A plurality of second multi-axis accelerometers can be placed at the vertices of the regular tetrahedron or at the vertices of the regular hexahedron.

Even if parts with relatively large weight (mass) such as batteries and substrates are placed at the vertices of regular polygons such as tetrahedrons and regular hexahedrons whose center of gravity planned position is the body center around the center of gravity planned position. Good.

One of the other aspects of the present invention is a system having a portable terminal including a second communication unit paired with the above-mentioned first communication unit of the ball. A portable terminal that generates ball movement data of a paired ball based on data of a first sensor of the paired ball obtained through the first communication unit and the second communication unit; And a first function of calculating at least one of an acceleration, a flight distance, and a displacement amount during flight of the ball paired with the data of the first sensor. Data from the accelerometers can trace the movement of the ball in flight. The first sensor may include a multi-axis magnetic sensor, a multi-axis gyro sensor, and the portable terminal may generate ball movement data including data from these sensors.

In the case where the first sensor includes a plurality of multi-axis acceleration sensors, the first function is to use the data of at least one of the plurality of multi-axis acceleration sensors included in the first sensor to pair the ball May include the function of canceling the acceleration component due to the rotation of. The portable terminal may include a unit that outputs the ball type of the paired ball using at least one of the acceleration, the flight distance, and the displacement amount.

The mobile terminal may include a simulator that displays a moving state of the ball as viewed from the outside based on the ball movement data. The portable terminal may include a unit that stores ball movement data in the cloud server via the Internet.

One of the other aspects of the present invention is a method of monitoring the movement of a ball through a portable terminal. The method comprises pairing a first communication unit of the ball with a second communication unit of the mobile terminal, and the mobile terminal is obtained via the first communication unit and the second communication unit. Calculating at least one of an acceleration, a flight distance, and an amount of displacement during flight of the paired ball using data of the first sensor of the paired ball.

One of the other aspects of the present invention is a ball comprising a first sensor including a multi-axis acceleration sensor, and a first communication unit for wirelessly transmitting sensor data detected by the first sensor. It is a program downloaded to a portable terminal including a second communication unit paired with one communication unit. In this program, the portable terminal uses the data of the first sensor of the paired ball obtained through the first communication unit and the second communication unit to accelerate the flying motion of the ball. , A flight distance, and a command to function as a unit for calculating at least one of the displacement amount during flight.

The figure which shows the outline | summary of the system using ball with a sensor. The figure which shows schematic structure of a sensor incorporated ball. FIG. 2 is a block diagram showing a schematic configuration of built-in hardware. The figure which shows the outline of the function mounted in the portable terminal paired with a sensor-incorporated ball. The flowchart which shows the outline | summary of the process of the application of a portable terminal.

FIG. 1 shows an outline of a system for digitizing a user's pitch and managing it via a cloud as an example of a system including a ball with a built-in sensor. This system 1 converts the state (pitching) 5 of the ball thrown by the user 2 from the mound 3 toward the catcher 4 by a sensor built in the ball 10 and manages it from the cloud 30 through the user's portable terminal 20 It is a system. The cloud 30 includes a computer network 31 such as the Internet, a server 35 connected to the computer network 31, and an online coach system 40 connected to the computer network 31.

The server (cloud server) 35 includes a user management function 36, a storage 37 that stores data for each user, a data management unit 38, and a data analysis unit 39 that performs ranking aggregation and the like. The on-line coach system 40 uses the per-user data stored in the server 35 to reproduce the user's pitches, and the coach 42 sends advice to the reproduced user pitches via the computer network 31. And unit 43.

FIG. 2 shows an example of a ball 10 incorporating a sensor. An example of the ball 10 is a baseball (ball-ball). The ball 10 has a core (core body) 11 made of rubber or cork, in which a capsule 13 containing hardware is housed, and a portion 12a of a wound which covers the periphery of the core 11 in the same manner as a regular baseball ball. And an outermost leather covering 12b. The core 11 includes a spherical capsule 13 made of resin containing hardware, and an elastic layer covering the capsule 13, for example, a rubber layer 11a. By storing the hardware in the capsule 13 and covering it with the material 11a of the core of the ball and storing the hardware in the core 11, misalignment does not occur even if hardware such as a sensor is included, Alternatively, it is possible to provide the ball 10 which does not generate a large misalignment.

The capsule 13 has a sensor (first sensor) 80 for detecting the movement of the ball 10, a control board (control unit) 17 on which a communication unit or the like is mounted, and the

batteries

18a and 18b in predetermined positions and orientations. It is configured to be stored, and in cooperation with the rubber layer 11a covering the capsule 13, is configured such that the overall weight and balance are almost the same as a regular baseball (hardball). The inside of the capsule 13 may have a multi-layered structure in which each part can be stored in a predetermined position in a predetermined posture, and after being stored, the inside of the capsule 13 may be sealed with a mold resin or the like.

FIG. 3 shows a schematic configuration of hardware including the sensor 80 stored in the capsule 13. The sensor (first sensor, sensor group) 80 includes multi-axis, for example, three-

axis acceleration sensors

81 and 82a to 82c, multi-axis, for example, three-axis gyro sensor 85, and multi-axis, for example, three-axis magnetic sensors And 86 and a sensor substrate 88. The control board 17 includes a short distance wireless communication unit (first communication unit, an example is BLE (Bluetooth (registered trademark) Low Energy) 17a) 17a, a control microcomputer 17b, and a memory 17c. The capsule 13 includes a plurality of

batteries

18a and 18b for supplying power to the above-mentioned hardware, and a switch 16 for controlling power on / off. In this example, in order to keep the weight and balance of the ball 10 with a sensor approximately equal to that of the conventional ball, the configuration of the hardware housed in the capsule 13 is simplified as much as possible, and the

batteries

18a and 18b are built-in type It has become a disposable type. It is possible to provide a non-disposable type of sensor-incorporated ball if it is compact and lightweight so that the function of charging the battery indirectly by wireless or the like can be accommodated inside the core 11.

In this example, the first sensor 80 accommodates the

acceleration sensors

81, 82a to 82d, the gyro sensor 85, and the geomagnetic sensor 86, but the three-axis acceleration sensor, the three-axis gyro sensor, and the three-axis geomagnetism The sensor may be a nine-axis sensor including a magnetic) sensor, or may be a one-chip sensor. The sensor 80 is disposed at the inner center 13 c of the capsule 13, and the center 13 c of the capsule 13 is a position to be the center of the core 11, that is, the center of gravity 10 g of the ball 10. The two

batteries

18 a and 18 b and the control board 17 are arranged around the sensor 80 such that the center 13 c of the capsule 13 is the center of mass (center of gravity). For example, the

batteries

18a and 18b, the control substrate 17, and the counterweight (not shown) are arranged to form a substantially regular tetrahedron so as to contact the inner surface of the spherical capsule 13. The internal arrangement of the capsule 13 is not limited to this, and the sensor 80 is arranged at the center 13c and arranged so that the overall weight balance of other hardware such as the

batteries

18a and 18b coincides with the center 13c. Is preferred. Furthermore, it is preferable that the moment of inertia be the same.

The first sensor 80 includes a plurality of

triaxial acceleration sensors

81, 82a to 82d. The first acceleration sensor 81 is disposed at the center 13 c of the capsule 13, that is, the expected center of gravity 10 g of the ball 10, and the four

second acceleration sensors

82 a, 82 b, 82 c and 82 d are of the first acceleration sensor 81. Around the first acceleration sensor 81, the first acceleration sensor 81 is disposed. Specifically, the four second acceleration sensors 82a to 82d are arranged at or near the first acceleration sensor 81, that is, at the apex of a regular tetrahedron whose center of gravity is at the center 13c. .

In the first acceleration sensor 81, when the capsule 13 is housed as planned with respect to the ball 10 and the center 13c of the capsule 13 coincides with the center of gravity 10g of the ball 10, almost centrifugal is performed even if the ball 10 rotates while flying. Does not detect acceleration due to force. Therefore, the acceleration with respect to the flying motion of the ball 10 can be detected.

On the other hand, when the capsule 13 is not stored as planned with respect to the ball 10 and the center 13c of the capsule 13 is shifted with respect to the center of gravity 10g of the ball 10, the first acceleration sensor 18 and the periphery thereof are disposed. The center of gravity 10g is located between any one or more of the second acceleration sensors 82a to 82d, or the center of gravity 10g is located near any of the second acceleration sensors 82a to 82d, or Alternatively, there is a high possibility that the center of gravity 10g is located between any of the second acceleration sensors 82a to 82d. Therefore, it is possible to obtain acceleration data with a small influence of the acceleration of the centrifugal force from any of the second acceleration sensors 82a to 82d. Furthermore, the data obtained from the first acceleration sensor 81 and one or more second acceleration sensors 82a to 82d can cancel the data on the acceleration of the centrifugal force, and there is a possibility that the acceleration data related to the flight movement can be obtained. is there.

The number of the second acceleration sensors 82a to 82d can be further increased if there is room in the capsule 13. For example, the second acceleration sensors 82a to 82d can be arranged at each vertex of a hexahedron whose center of gravity 13c is the body center position. It is possible.

In this ball 10, the power switch 16 is connected to one of the

acceleration sensors

81 and 82a to 82d, and when it is detected that the ball 10 is thrown up and becomes free fall, the

batteries

18a and 18b control board 17 And enter the measurement state via the power supply to the other sensors of the sensor 80. The operation of turning on the power switch 16 is not limited to free fall, and other sensors may be used to detect, for example, that the ball 10 is rotated or that it is swung around with the ball 10. The power switch 16 stops the power supply from the

batteries

18a and 18b when a state where no data of movement of the ball 10 from the sensor 80 is not detected continues for a predetermined time.

When measurement is started, the microcomputer 17b performs predetermined sampling of data (sensor data) 51 detected by the sensor 80, for example, acceleration in three axial directions, angular velocity in three axial directions, and geomagnetism in three axial directions. The data is stored in the memory 17c at the pitch. When the measurement is completed, the microcomputer 17b outputs the stored sensor data 51 via the wireless communication unit 17a.

The structure of the portable terminal 20 is shown in FIG. An example of the portable terminal 20 is a smart phone, and via a short distance wireless communication unit (second communication unit, an example is BLE (Bluetooth (registered trademark) Low Energy) 21) 21 and a wireless LAN and / or a mobile telephone communication network. Data communication unit 22 for transmitting and receiving data, a GPS 23 for measuring latitude and longitude, an electronic compass 24 for determining the direction, an acceleration sensor 25, a processor 26 for realizing various functions, a memory 27, and input / output It includes a display 28 a which is a unit, a touch sensor 28 b and an audio input / output unit 29.

The processor 26 is a terminal for generating ball movement data and / or a terminal for analyzing the behavior (flying state) of a ball according to an instruction included in an application program (application, program, program product) 60 downloaded to the memory 27. Provide features. The processor 26 performs pairing with the unit 61 for pairing the communication unit (first communication unit) 17 a built in the ball 10 with the communication unit (second communication unit) 21 of the portable terminal 20 according to the program 60. Unit 62 for acquiring external information 52 indicating an environment in which the ball 10 moves alone and the sensor data 51 of the paired ball 10 obtained through the

communication units

17a and 21 are associated with the external information 52 It functions as a unit 63 which generates ball movement data 55 of the ball 10 paired.

Further, the processor 26 analyzes the acceleration data of the ball 10 according to the instruction included in the application program 60, the unit 65 which analyzes the rotation of the ball 10, the acceleration of the ball 10, the angle of the rotation axis, the ball speed and so on. A unit 66 for outputting the type of ball based on the number of rotations, a simulator 67 for displaying the moving state of the ball 10 as viewed from the outside, a unit 68 for analyzing pitching motion, sensor data 51 and external information 52 Function as a unit 69 for storing (uploading) the ball movement data 55 integrated with the above into the cloud server 35 via the Internet 31 and a unit 70 for displaying the content supplied from the cloud server 35.

In FIG. 5, the application 60 is activated, the sensor data 51 is acquired from the ball 10 paired by the portable terminal 20, the ball movement data 55 of the paired ball 10 is generated, and the paired ball is generated. An outline of a process (method) for analyzing ten movements is shown by a flowchart. In step 101, the ball 10 with a built-in sensor and the portable terminal 20 are paired. Specifically, the unit 61 for pairing the portable terminal 20 pairs the first communication unit 17 a contained in the ball 10 with the second communication unit 21 of the portable terminal 20. Thereby, the correspondence between the specific ball 10 and the specific portable terminal 20 is uniquely determined, and the external information 52 input to the paired portable terminal 20 is the sensor data 51 of the paired ball 10 and It is related by one to one. It is possible to pair a plurality of balls 10 with one portable terminal 20, and in that case, in step 102, the ball 10 to be thrown is selected from the balls 10 being paired.

When the relationship between the portable terminal 20 and the ball 10 is set one-to-one by pairing, in step 103, external information 52 indicating an environment in which the ball 10 moves alone is acquired. A unit 62 for acquiring external information acquires a throwing distance, a throwing direction, and positional information (latitude and longitude) as the external information 52 from the screen of the portable terminal 20, the GPS 23, and the like. Position information related to throwing may be a throwing position (mound), a catching position (home), or an intermediate position, and may be a position that does not greatly deviate from the flight path of the ball 10 Just do it. “Pushing direction” displays the direction in which the mobile terminal 20 is facing using the electronic compass 24 of the mobile terminal 20, and the unit 62 is automatically acquired by matching the direction of the mobile terminal 20 with the throwing direction. You may do it.

When the external information 52 is set in the portable terminal 20, in step 104, the "pitching start" button displayed on the portable terminal 20 is clicked. By this operation, a command to obtain sensor data 51 from the portable terminal 20 and to start storing the data in the memory 16c via the second communication unit 21 and the first communication unit 17a with respect to the ball 10 Is sent. When the pitching is over, the user 2 clicks “pitching end” displayed on the screen of the portable terminal 20 in step 105. By this operation, a command to end acquisition of the sensor data 51 is transmitted to the ball 10 being paired from the portable terminal 20 through the second communication unit 21 and the first communication unit 17a. At the same time, a command to transmit the sensor data 51 stored in the memory 16 c to the portable terminal 20 is transmitted, and the unit 63 to generate the sensor data 51 from the ball 10 is a function implemented by the application program 60 on the portable terminal 20. get. In the following, the functions implemented by the application program (program product) 60 will be described as the functions of the portable terminal 20.

In step 106, the unit 63 generated by the portable terminal 20 associates the sensor data 51 acquired from the ball 10 with the external information 52 input to the portable terminal 20, and transmits the ball movement data of the paired ball 10 (Movement data) 55 is generated. The sensor data 51 includes acceleration data in three axial directions, gyro (angular velocity) data in three axial directions, and geomagnetic data in three axial directions. The external information 52 includes a throw distance at which the ball 10 moves, that is, a distance from the mound 3 to the catcher 4, a throw direction, and latitude and longitude information. The ball movement data 55 may include the sensor data 51 as raw data, and may include as planned data or standardized data by the external information 52.

The sensor data 51 is information (internal information) that can be acquired inside the ball 10 by the sensor 80, and is information necessary to reproduce the movement of the ball 10 itself. In order to reproduce the movement of the ball 10 with respect to the outside world, it is desirable that information such as pitching distance, pitching direction, and latitude and longitude information can be acquired. On the other hand, in the ball 10 of this example, the acceleration (vector amount) regarding the movement as the mass point of the center of gravity of the ball can be measured excluding the influence of the rotation, so that the acceleration of the flight movement The acceleration as a quantity can be determined accurately. Therefore, it is possible to determine the flight distance by using the acceleration, or to obtain the change of the flight motion (the displacement amount, the vector amount including the direction and the amount). Further, geomagnetic information can also be acquired by the geomagnetic sensor 86 incorporated in the ball 10. Therefore, the sensor data 51 can reproduce how the ball 10 is moving with respect to the outside world. On the other hand, the information obtained by the sensor 80 of the ball 10 is verified by the information obtained by the portable terminal 20, or the information which can not be obtained by the sensor 80 of the ball 10 under certain conditions is complemented by the information obtained by the terminal 20 It is important to ensure the evaluation of the information and the stability of the system 1.

The upload unit 69 of the portable terminal 20 uploads the movement data 55 to the cloud server 35 via the data communication unit 22 in step 107. The movement data 55 of this example includes external information 52 for analyzing a pitch and raw data (RawData) acquired from the sensor 80 as the sensor data 51 as it is. Therefore, by uploading the movement data 55 to the cloud server 35, the movement data 55 can be analyzed by various methods, and the movement data 55 can be used for various applications. Also, if the analysis method is advanced, it is also possible to re-analyze the movement data 55 in an advanced method.

The mobile terminal 20 uploads the movement data 55, and in step 108, can evaluate the pitch on the spot based on the information obtained by the sensor data 51 and the external information 52. The pitch may be analyzed and evaluated based on the movement data 55 stored in the memory 27 including the sensor data 51 and the external information 52, and the pitch may be analyzed based on the sensor data 51 and the external information 52 obtained at that time.・ You may evaluate. Evaluating 108 includes analyzing 108 a acceleration, analyzing 108 b rotation, and 108 c determining a ball type.

In step 108a of analyzing the acceleration, a unit 64 analyzing the acceleration evaluates and analyzes data of the

acceleration sensors

81, 82a to 82d included in the sensor data 51. If it is judged that noise (ripple) is small due to centrifugal force in the data of the first acceleration sensor 81 arranged at the planned position of the center of gravity 10g of the ball 10, and acceleration data is obtained due to air resistance during flight, The acceleration data is used to determine a change in velocity with respect to the flight distance of the ball 10 in flight. In addition, when the data of acceleration includes data of acceleration in the direction in which the flight motion changes, the displacement (displacement amount) of the flight motion is determined by integrating the data.

On the other hand, when the unit 64 for analyzing the acceleration determines that the noise (ripple) is large due to the centrifugal force included in the data of the first acceleration sensor 81, the data of the second acceleration sensors 82a to 82d is evaluated. The unit 64 adopts the data of the least noise acceleration sensor among the plurality of acceleration sensors 82a to 82d, or cancels the noise (acceleration component) due to the centrifugal force using the data of the plurality of acceleration sensors. Processing to generate acceleration data of the flying motion of the ball 10.

In step 108b of analyzing the rotation, the unit 65 for analyzing the rotation determines how many times the ball 10 has rotated during the movement period. Specifically, the number of revolutions Pr is calculated based on the number of amplitudes of the geomagnetic data of the sensor data 51. The rotation speed Pr can not be obtained when the ball 10 rotates perpendicular to the earth's magnetism, but it hardly occurs when the pitcher's pitch is targeted.

In step 108 c for determining the type of ball, the unit 66 for determining the type of ball determines which angle the ball 10 is rotating with respect to the horizontal plane and the advancing direction of the ball 10. Further, the type of ball is determined with reference to the change in acceleration and the amount of displacement during the flight of the ball 10. For example, after the ball leaves the hand of the pitcher, the degree to which the ball has changed in the horizontal and vertical directions as compared to the free fall movement in vacuum until the ball reaches the catcher is the hand of the catcher It can be expressed by the displacement amount at Further, since the acceleration in the flight direction of the ball 10 can also be measured, the deceleration of the ball can be calculated, and changes in the velocity including the "initial velocity" and the "final velocity" can be observed. If the acceleration of the flight motion can be accurately measured, the velocity of the ball in flight can be known, so that the flight distance and velocity of the ball 10 can be measured without externally inputting the flight distance. For this reason, speed measurement becomes possible at free distance.

The method described in Patent Document 1 is for determining the geomagnetic dip from the position information included in the geomagnetic sensor 86 or the external information 52, analyzing the data of the geomagnetic sensor 86, and determining the rotation speed and the direction of the rotation axis. Can be used. The ball type determination unit 66 specifies the ball type of the thrown ball 10 according to the ball speed Pv, the number of rotations Pr, and the angle of the rotation axis.

In step 108 of evaluating the pitch, not only the evaluation of the previous pitch but also the evaluation of the pitch stored in the portable terminal 20 or the data of the past pitch is downloaded from the cloud server 35 It is possible to evaluate pitch by processing. Furthermore, in step 109, the simulator 67 simulates and displays the movement seen from the outside of the ball 10 based on the ball movement data 55. Furthermore, in step 110, the unit 68 for analyzing the throwing motion can evaluate the throwing motion using the information in the sensor data 51 before the ball 10 is released.

Furthermore, the application 60 (portable terminal 20) includes a unit 70 for supplying content. This unit 70 analyzes the movement data 55 for each user collected by the cloud server 35, the ranking result for all users, the comparison result with the pitch of professional baseball players, etc. Provide to user 2 through.

In the case of a ball scheduled for high-speed rotation, for example, a hard ball for professional baseball, the maximum rotation speed is expected to be about 3500 rpm, and the acceleration sensor 81 has an error of 1 mm from the center of gravity 10 g in consideration of the measurement range of the current acceleration sensor. It should be set to a degree or less. Also, if the size of the acceleration sensor is about 2 mm, it is difficult to arrange a plurality of acceleration sensors in or around the planned area of the center of gravity 10g. Even if the acceleration sensor 81 is disposed at the center of gravity 10g and there is a minute displacement and the centrifugal force is detected when the ball 10 rotates, the centrifugal force can be canceled by numerical processing if it falls within the measurement range of the acceleration sensor 81.

Furthermore, it is also important to realize the same physical characteristics as the ball core of a real professional baseball hard ball. Therefore, the acceleration sensor 81 is placed at the center of gravity 10g, the center of gravity 10g coincides with the center 13c of the core 11, and the moments of inertia of the hardware in the capsule 13 including the capsule 13 around the center of gravity 10g are equalized in each axis, It is important to set the mass of the core 11 including the capsule 13 to a prescribed value (20 g at present). Furthermore, it is desirable that the hardness, elasticity, damping factor of vibration, etc. of the core 11 be in the same range as the hardball of the professional baseball specification or in a specified range.

Therefore, the substrate 88 on which the acceleration sensor 81 is mounted is disposed on a plane passing through the center of gravity 10g, and the component surface of the substrate 88 (arrangement surface of the acceleration sensor etc.) faces the

battery

18a or 18b as close to the center of gravity 10g as possible. Placing or placing a hole in the substrate 88 and placing the acceleration sensor 81 in the hole and placing it as close as possible to the center of gravity 10g, placing only the acceleration sensor 81 on the flexible substrate, as close as possible to the center of gravity 10g It is preferable to consider placement in the As a sensor device, since the gyro sensor 85 and the geomagnetic sensor 86 may be mounted as sensors other than the acceleration sensor 81, the acceleration sensor 81 in the sensor device is not at the center of these sensor devices but the center of gravity 10g Need to be placed in place.

The number of batteries may be one, and in this case, it is preferable to arrange the batteries as close to the center of gravity 10g as possible (so that the moment of inertia around the center of gravity is small) without interfering with the acceleration sensor 81. When two

batteries

18a and 18b are used, it is preferable to arrange them as close as possible to the center of gravity 10g (so as to reduce the moment of inertia around the center of gravity) by sandwiching the acceleration sensor 81 arranged at the center of gravity 10g.

Furthermore, it is also preferable to adjust the thickness of the outer shell rubber 11a covering the outside of the capsule case 13 in three dimensions by molding so as to balance the moment of inertia around the center of gravity 10g. Furthermore, it is also possible to adjust the thickness of the capsule case 13 in three dimensions so that the moment of inertia can be balanced, as long as the strength is not affected. It is also preferable to use one or more counterweights and arrange them so as to equalize the moment of inertia around the center of gravity.

After manufacturing, in the case of a ball whose center of gravity can be adjusted by moving the position of the core 11, arranging the counterweight, moving the position of the counterweight, etc., the ball is rotated and arranged at the planned center of gravity 10g. The output of the acceleration sensor 81 may be verified to adjust the position of the center of gravity. Also, in the case of a ball capable of adjusting the position of the capsule 13 containing hardware such as an acceleration sensor, the position of the capsule 13 is determined by verifying the output of the acceleration sensor 81 disposed at the expected gravity position 10g by rotating the ball. You may adjust.

In the above description, although a baseball with a sensor incorporated therein is described as an example, the baseball may be a hard or soft ball, or may be a soft ball. Furthermore, the present invention can be applied by incorporating a sensor in the center (center of gravity) of a ball for cricket balls, bowling balls, golf balls, soccer balls, volleyballs and other sports balls. In golf balls, for example, it is possible to use for putting practice in which the impact applied to the ball is low.

10 balls

Claims

A first sensor including a multi-axis acceleration sensor;
A first communication unit wirelessly transmitting sensor data detected by the first sensor;
A ball including the first sensor and a battery for supplying power to the first communication unit;
The first sensor includes a first multi-axis acceleration sensor stored at a predetermined gravity center position of the ball, and the first communication unit and the battery are disposed at a position deviated from the predetermined gravity center position. ,ball.
In claim 1,
Having a core body forming a central portion of the ball;
A ball, wherein the first sensor, the first communication unit, and the battery are incorporated in the core body.
In claim 1 or 2,
The ball includes a plurality of second multi-axis acceleration sensors disposed adjacent to the first multi-axis acceleration sensor disposed at the predetermined gravity center position.
In claim 3,
The plurality of second multi-axis acceleration sensors includes a plurality of second multi-axis acceleration sensors arranged such that the first multi-axis acceleration sensor is at a body-centered position.
A system comprising a portable terminal comprising a second communication unit paired with said first communication unit of the ball according to any of the claims 1 to 4;
The portable terminal is a ball movement data of the paired ball based on data of the first sensor of the paired ball obtained through the first communication unit and the second communication unit. Units to generate
A first function of calculating at least one of an acceleration, a flight distance, and an amount of displacement during flight of the paired ball using data of the first sensor.
In claim 5,
The first sensor includes a plurality of multi-axis acceleration sensors,
The first function includes a function of canceling an acceleration component due to rotation of the paired ball using data of at least one of a plurality of multi-axis acceleration sensors included in the first sensor. .
In claim 5 or 6,
The mobile terminal includes a unit that outputs a ball type of the paired ball using at least one of the acceleration, a flight distance, and a displacement amount.
In any one of claims 5 to 7,
A system, comprising: a simulator in which the portable terminal displays a moving state of the ball as viewed from the outside based on the ball movement data.
In any of claims 5 to 8,
The system in which the portable terminal includes a unit that stores the ball movement data in a cloud server via the Internet.
A system comprising the ball according to any one of the preceding claims.
A method of monitoring the movement of a ball through a mobile terminal,
A first communication unit wirelessly transmits the first sensor including a first multi-axis acceleration sensor stored at a predetermined gravity center position of the ball, and the sensor data detected by the first sensor. Including and
The mobile terminal includes a second communication unit,
The method is
Pairing the first communication unit of the ball and the second communication unit of the mobile terminal;
A flight motion of the paired ball using data of the first sensor of the paired ball obtained by the portable terminal through the first communication unit and the second communication unit. Calculating at least one of the acceleration, the flight distance, and the displacement during flight.
In claim 11,
The first sensor includes a plurality of second multi-axis acceleration sensors disposed adjacent to the first multi-axis acceleration sensor.
The calculating may include canceling an acceleration component due to rotation of the paired ball using data of at least one of a plurality of multi-axis acceleration sensors included in the first sensor.
In claim 11 or 12,
Determining the ball type of the paired ball using at least one of the acceleration, flight distance and displacement amount.
Paired with a first communication unit of a ball incorporating a first sensor including a multi-axis acceleration sensor and a first communication unit for wirelessly transmitting sensor data detected by the first sensor A program downloaded to a portable terminal including a second communication unit, the program comprising:
The portable terminal uses the data of the first sensor of the paired ball obtained through the first communication unit and the second communication unit to perform the flying motion of the paired ball. A program including an instruction that functions as a unit that calculates at least one of acceleration, flight distance, and displacement during flight.