JP2006230563A - Core deviation measuring apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a core deviation measuring apparatus which enables the selection of a bat that can make the ball hitting position approach its core position or the correction of the ball hitting form of a hitter by measuring a difference between the ball hitting position and the core position of the bat in the actual hitting of the ball with the bat. <P>SOLUTION: The core deviation measuring apparatus measures the degree of deviation from the core between the core position 1 of the ball hitting bat B and the hitting position 2 of the ball K caused by the bat B. The apparatus is provided with a high-speed camera 5 which photographs the way of hitting the ball K with the bat B and an arithmetic means 6 which determines a distance d as the difference between the core position 1 of the bat B and the hitting position 2 of the ball K based on the images from the high-speed camera 5. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a misalignment measuring apparatus.

  There are various types of bats used in soft baseball, hard baseball, and softball games depending on differences in weight, length, thickness, shape, and the like. On the other hand, batters also have bats suitable for each batter, depending on weight, height, arm strength, and the like.

  And when the bat is not suitable for the batter, when the batter hits the hit ball, it is easy to hit the ball at a position shifted from the core of the bat, and as a result, the hit ball does not fly the expected distance, There was a tendency that the hit ball did not fly in the expected direction. For this reason, it is extremely important for the batter to select a bat suitable for himself in order to perform the battery as expected.

  However, in the past, it was common to purchase a bat based on the advice of a sports store clerk, but there was no method for objectively selecting a bat suitable for the customer, so a bat suitable for the customer was selected. It was practically difficult to do.

  The present invention has been made in view of the above-described problems of the prior art, and its purpose is to actually hit a ball with a bat, and to measure the difference between the hit position of the ball and the core position of the bat. Accordingly, it is an object of the present invention to provide a misalignment measuring apparatus that can select a bat whose ball striking position can be close to the bat core position or correct a batter's batting form.

  The invention according to claim 1 is a misalignment measuring device that measures the degree of misalignment between the striking position of the hitting ball bat and the striking position of the ball by the bat. The image processing apparatus includes: a high-speed camera that captures an image; and a calculation unit that obtains a distance between a bat core position and a ball hitting position based on an image of the high-speed camera.

  The invention according to claim 2 is a misalignment measuring device for measuring the degree of misalignment between the core position of the hitting ball bat and the hit position of the ball by the bat, and the state of the ball hitting by the bat. A high-speed camera for imaging, a detection means for detecting the time of hitting the ball by the bat, and a calculation means for obtaining the distance between the core position of the bat and the ball hitting position based on the image of the high-speed camera at the time of the hit It is characterized by comprising.

  The invention described in claim 3 is characterized in that, in the invention described in claim 1 or 2, the sphere is set stationary.

  The invention described in claim 4 is characterized in that, in the invention described in claim 1 or claim 2, the ball is thrown.

  The invention according to claim 5 is the invention according to any one of claims 1 to 4, characterized in that the detection means is provided on a ball or a bat and detects a ball hitting point. Is.

  The invention described in claim 6 is the invention described in any one of claims 1 to 5, wherein the high-speed camera is provided above a ball hitting position by a bat. It ’s a thing.

  The invention according to claim 7 is the invention according to any one of claims 1 to 5, wherein the high-speed camera is provided below a ball hitting position by a bat. Is.

  According to an eighth aspect of the present invention, there is provided a high-speed camera that captures an image of a ball hitting by a bat from the side, and a vertical misalignment between a bat position and a ball hitting position based on an image of the high-speed camera. And a calculation means for obtaining the degree.

  According to the first aspect of the present invention, the ball striking position is changed to the bat core position by measuring the difference between the ball striking position and the bat core position while actually striking the ball with the bat. You can select a bat that can be approached, or correct the batter's batting form.

  According to the second aspect of the present invention, in addition to the effects of the first aspect of the invention, the image of the moment when the bat hits the ball can be immediately detected by the detecting means, and each batter can be detected. It is possible to easily select a bat suitable for the batter and to correct the batter's batting form.

  According to the invention described in claim 3, in addition to the effects of the invention described in claim 1 or 2, the bat suitable for each batter can be obtained by hitting a stationary ball with the bat. You can select or correct the batter's batting form.

  According to the invention described in claim 4, in addition to the effects of the invention described in claim 1 or 2, the bat suitable for each batter can be obtained by hitting the pitched ball with the bat. You can select or correct the batter's batting form.

  According to the invention described in claim 5, in addition to the effects of the invention described in any one of claims 1 to 4, the detecting means is provided on the ball or the bat, and the ball is formed by the bat. The moment of being struck can be detected.

  According to the invention described in claim 6, in addition to the effect of the invention described in any one of claims 1 to 5, the ball is hit by the bat from above the batter by the high speed camera. Moment can be detected.

  According to the invention described in claim 7, in addition to the effects of the invention described in any one of claims 1 to 5, the ball is hit by the bat from below the batter by the high speed camera. Moment can be detected.

  According to the invention described in claim 8, by measuring the degree of vertical difference between the bat core position and the ball hitting position, a bat suitable for each batter can be selected, or the batting form of each batter. Can be corrected.

  1 to 12 show a first embodiment. As shown in FIG. 1, the misalignment measuring apparatus of the present embodiment is an apparatus for obtaining a difference distance d between the core position 1 and the striking position 2 of the hitting ball bat B when the batter hits the ball K. .

  FIG. 2 shows a side view of the misalignment measuring device 3. In the first embodiment, the ball K is placed on the tee 4 and set stationary. The tee 4 can be expanded and contracted in the vertical direction, and can be adjusted to a height suitable for a batter.

  As shown in FIG. 2, the misalignment measuring device 3 includes a high-speed camera 5 and a calculation means 6. The high-speed camera 5 is a device that captures an image of the bat B hitting the ball K. The high-speed camera 5 is arranged directly above the tee 4 so that the moment when the bat B strikes the ball K placed on the tee 4 can be imaged from above. The high-speed camera 5 can be constituted by a CCD camera.

  As shown in FIG. 1, the calculation means 6 is a means for calculating the difference distance d between the core position 1 of the bat B and the striking position 2 of the ball K by calculation. The computing means 6 can be constituted by a personal computer.

  As shown in FIG. 2, the high-speed camera 5 is disposed directly above the tee 4 while being supported by the camera support 7. The camera support 7 includes a base 8, a support 9, and a camera mounting portion 10.

  The computing means 6 includes a memory 11 and a computing unit 12 as shown in FIG. The memory 11 is a memory for storing image information captured by the high speed camera 5. The calculation unit 12 is a means for obtaining a distance d, which is the difference between the core position 1 of the bat B and the striking position 2 of the ball K based on image information captured by the high-speed camera 5. In addition to the memory 11 and the calculation unit 12, the calculation unit 6 includes a display unit 13 and can display an image captured by the high-speed camera 5. The display means 13 can be constituted by a display of the personal computer. The high-speed camera 5 and the calculation means 6 are activated by a measurement start switch (not shown). The high-speed camera 5 terminates imaging by a batting end switch (not shown).

  Next, the core position 1 of the bat B will be described with reference to FIG. In general, when the ball K collides with the bat B, as shown in FIG. 4, the bat B vibrates, and the belly H and the nodes P1 and P2 are generated in the bat B. The abdomen H is a part that vibrates greatly when the ball K collides with the bat B. The nodes P1 and P2 are portions that do not vibrate even when the ball K collides with the bat B. Therefore, by hitting the ball at the positions of the nodes P1 and P2 of the bat B, the ball K can be effectively hit back with the least loss. As shown in FIG. 4, the nodes P1 and P2 are generated one at each of the front end side of the bat B and the grip G side, but only one is generated on the front end side of the bat B. For this reason, the positions of the nodes P1 and P2 of each bat B can be clearly defined.

  Therefore, in the present invention, the position P1 of the node generated on the tip side of the bat B is defined as the core position 1 of the bat B. The core position 1 is a unique position for each bat B determined by the length, thickness, weight, shape, etc. of the bat B. For each bat B, the core position 1 is in the length direction of the bat B. It is something that changes subtly along.

  Therefore, in order for each batter to hit the ball K efficiently at the core position 1 of the bat B, each batter with different conditions such as height, arm strength, arm length, batting form, etc. It is necessary to select an appropriate bat B for yourself. Therefore, in this embodiment, the batter actually hits the ball, and at that time, by measuring the difference between the bat core position 1 and the ball hitting position 2, the ball hitting position 2 becomes the bat hitting position. The bat B that can be brought close to the lead position 1 is selected, and the batter's batting form can be corrected.

  Next, operations of the memory 11 and the calculation unit 12 will be described with reference to FIG. First, in step S1, the measurement start switch is operated to operate the entire system.

  In step S2, the high-speed camera 5 starts imaging continuously. In step S <b> 3, imaging information captured by the high-speed camera 5 is stored in the memory 11. An image captured by the high-speed camera 5 at this time is shown in FIG. At this time, since the batter has not yet started batting, the bat B is not captured in the image shown in FIG. 6, and only the sphere K placed thereon is captured.

  Next, in FIG. 5, the batter starts batting in step S4. An image captured by the high-speed camera 5 at this time is shown in FIG. In FIG. 7, the bat B is still imaged with a considerable distance from the sphere K placed on the tee 4.

  Next, in FIG. 8, a sphere K placed on the tee 4 and a bat B that gradually approaches the sphere K are imaged. In FIG. 9, the moment when the bat B hits the ball K is imaged. Thereafter, as shown in FIG. 10, the state in which the sphere K is separated from the bat B and jumps forward is captured. Each of the images shown in FIGS. 6 to 10 is stored in the memory 11 as image information and displayed on the display means 13.

  Next, in FIG. 5, when the batter finishes the batting in step S <b> 5, the batting end switch is operated, and the imaging of the high-speed camera 5 is terminated in step S <b> 6.

  Next, in step S7, an image in which both the bat B and the sphere K are imaged is extracted from the image information stored in the memory 11. That is, the images shown in FIGS. 7 to 10 are extracted.

  In this case, as shown in the figure, the background of the image and the bat B are black and the sphere K is white, while two white core position identification lines R1 and R2 are provided at positions sandwiching the core position 1 of the bat B. By providing and binarizing the image information, the core position 1 of the bat B and the sphere K can be identified from the background. That is, in the image information, the background information and the bat B are recognized as a set of “0” and the sphere K is recognized as a set of “1”, while the core position 1 of the bat B is represented by two core position identification lines R1, R1. It can be recognized as being sandwiched by a set of “1” s in R2. When batting is performed, the core position 1 sandwiched between the two core position identification lines R1 and R2 of the bat B approaches the ball K and strikes the ball K. In the above description, the bat B is black and has the same color as the background. However, the bat B is white (or the color unique to the product), and a black tape is pasted on the core position 1 so that the bat B Each of K and core position 1 may be recognized. Even if no tape is applied to the core position 1, the tip of the bat B is marked, and the data of the distance N from the core position 1 of each bat B to the mark of the tip is registered in advance. 1 can be synthesized on the virtual screen, and the distance between the core position 1 and the sphere K can be similarly obtained.

  Next, in step S8, the bat B and the sphere K are extracted from the images shown in FIGS. 7 to 10 extracted as described above, that is, the images in which both the bat B and the sphere K are captured. The image having the shortest distance between them, that is, the image shown in FIG. 9 is selected. Hereinafter, the difference distance d between the core position 1 of the bat B and the striking position 2 of the ball K is obtained based on the image shown in FIG.

  First, in step S9, the core position 1 of the bat B is obtained. The core position 1 is known as described with reference to FIG. In step S10, the position of the sphere K is obtained. Next, a method for obtaining the distance d, that is, the amount of misalignment between the core position 1 of the bat B and the striking position 2 of the ball K in step S11 will be described with reference to FIG.

  First, in the screen shown in FIG. 11, the X axis and the Y axis are orthogonal to each other at the center 0. In FIG. 11, a bat B indicated by a solid line indicates the bat B at the position shown in FIG. 8, and a bat B indicated by a two-dot chain line indicates the bat B at the position shown in FIG. The core position 1 of the bat B appears as a line segment orthogonal to the axis L of the bat B at a predetermined distance N from the tip of the bat B. In FIG. 8, the midpoint of the line segment indicating the core position 1 of the bat B is A (x1, y1), and the midpoint of the line segment indicating the core position 1 of the bat B in FIG. 9 is B (x2, y2). And Assuming that the bat B at the time of hitting the ball K is linearly moved, a straight line T obtained by extending the locus of the core position 1 of the bat B can be obtained by Equation 1.

(Equation 1)
y = (y2-y1) / (x2-x1) x + (x2y1-x1y2) / (x2-x1)
When the center coordinate of the sphere is Q (s, t), the distance d between the straight line T and the center coordinate of the sphere, that is, the difference between the core position 1 of the bat B and the striking position 2 of the sphere K. The distance d, that is, the amount of misalignment is expressed by the following formula 2.

(Equation 2)
d = | as−t + b | / √ (a ² +1)
However, a = (y2-y1) / (x2-x1)
b = (x2y1-x1y2) / (x2-x1).

  In step S12, the amount of misalignment is displayed on the display means 6 shown in FIG.

  FIG. 12 is a screen of the display means 13 that displays the result of measuring the misalignment as described above, and the batter hits the batter using a plurality of bats having different elements such as the position of the core, the length, and the weight. FIG. 6 is a screen displaying the result of measuring the misalignment using each bat B for each bat B. FIG. As described above, the result of the misalignment using each bat B can be viewed as a list, so that each batter can search for a bat suitable for himself while comparing it with other bats. Of the bats B displayed in FIG. 12, it is recognized that the bat B having the name XXXXX has the smallest amount of misalignment and is appropriate.

  As described above, by calculating the degree of difference between the core position 1 of the bat B and the striking position 2 of the ball K, and correcting the batting form of the batter, the striking of the core position 1 of the bat B and the ball K Position 2 can be gradually approached. The direction of the hit ball and the distance of the hit ball can be estimated from the head speed of the bat B, the hit ball speed, the impact rate, the launch angle, etc. In this case, the ball is assumed to be at the core position of the bat B. When hitting, this apparatus can be used to guide the batter's flying distance to the batter.

  13 and 14 show a second embodiment. The feature of the second embodiment is that a vibration sensor is embedded in the tee 4, and the impact time is detected by detecting the vibration at the moment when the ball K is struck, and the image information captured at the impact time is immediately stored from the memory 11. The distance d, which is the difference between the core position 1 of the bat B and the striking position 2 of the ball K, may be measured immediately. The vibration sensor constitutes detection means for detecting the moment when the bat B hits the ball K. A flowchart of the third embodiment is shown in FIG.

  In FIG. 14, first, after the measurement start switch is operated in step S1, batting is started in step S2. As described above, the vibration sensor embedded in the tee 4 detects vibration in step S21, and at the same time, the high-speed camera 5 operates in step S22, and the captured image is stored in the memory 11 in step S23. To do. Thereafter, similarly to the first embodiment, Steps S9 to S12 are executed. In this embodiment, if the responsiveness of the high-speed camera 5 is good, the high-speed camera 5 can take an image of the moment immediately after the detection means detects the moment when the bat B hits the ball K. Therefore, the distance d, which is the difference between the core position 1 of the bat B and the striking position 2 of the ball K, can be measured only by capturing only the instantaneous image with the high-speed camera 5. The detection means may be provided on the ball K or the bat B so as to detect the moment when the bat B hits the ball K.

  15 and 16 show a third embodiment. The third embodiment is characterized in that the first and second sensors 21 and 22 are provided along the direction in which the hit ball K is launched. These two sensors 21 and 22 are composed of a light emitting unit 23 and a light receiving unit 24. The laser beam R output from the light emitting unit 23 is received 24 times by the light receiving unit.

  Next, a flowchart of the third embodiment will be described with reference to FIG. Steps S1 to S4 are the same as those in the first embodiment, and a description thereof will be omitted.

  When the hit ball K is detected by the first and second sensors 21 and 22 in steps S21 and S22, the imaging by the high-speed camera 5 is terminated in step S23.

  Next, in step S24, the time of hitting the ball K by the bat B is obtained. The hitting time is obtained as follows. First, when the two sensors 21 and 22 detect the hit ball K, respectively, a time difference between the time points when the two sensors 21 and 22 detect the hit ball K is obtained. Thereafter, the speed of the hit ball K is obtained by dividing the distance between the two sensors 21 and 22 by the time difference. Then, by dividing the distance between the first sensor 21 and the tee 4 by the velocity of the hit ball K, the time from when the sphere K is hit until the sphere K reaches the first sensor from the tee 4 is obtained. Can do. For this reason, it is possible to obtain the time point at which the ball K is hit by the bat B by retroactively measuring the time from when the hit ball K is detected by the first sensor 21 until the hit ball K reaches the first sensor 21 from the tee 4. it can. For this reason, image information captured at the time of impact can be immediately read out from the memory 11.

  As described above, in the third embodiment, the distance d, which is the difference between the core position 1 of the bat B and the striking position 2 of the ball K, is immediately read by immediately reading out the image information captured at the time of striking from the memory 11. Can be measured.

  17 and 18 show a fourth embodiment. As shown in FIG. 17, the fourth embodiment is characterized in that the distance between the core position 1 of the bat B and the striking position 2 of the ball K when the batter hits the ball K thrown from the pitching machine 31. It is characterized in that d is measured. In the fourth embodiment, first and second sensors 21 and 22 are disposed between the pitching machine 31 and the batter.

  Next, the operation of the calculating means 6 will be described based on FIG. First, in step S31, the measurement start switch is operated to operate the entire system. In step S32, the pitching machine 31 throws the ball K. In step S33, the high-speed camera 5 starts imaging, and the captured image information is stored in the memory 11 in step S34.

  Next, the ball K launched from the pitching machine 31 reaches the hand of the batter while being detected by the second and first sensors 22 and 21 in steps S35 and S36. In step S37, the batter returns. The sphere K hit back by the batter is detected by the first sensor 21 in step S38 and then detected by the second sensor 22 in step S39. When the second sensor 22 detects the hit ball K in step S39, the operation of the high-speed camera 5 is stopped in step 40.

  Steps subsequent to step S7 are the same as those in the first embodiment, and a description thereof will be omitted. In the above embodiment, the case where the batter hits the ball K launched from the pitching machine 31 has been described. However, the present invention can be applied to the case where the batter hits a ball thrown by a human instead of the pitching machine 31. .

  Thus, in the fourth embodiment, when the batter hits the pitched ball, the distance d, which is the difference between the core position 1 of the bat B and the hitting position 2 of the ball K, can be measured. .

  FIG. 19 shows a fifth embodiment. A feature of this embodiment is that the degree of the distance d, which is the difference in the vertical direction between the core position 1 of the bat B and the striking position 2 of the ball K, is obtained. For this reason, the high-speed camera 5 captures an image of the moment when the ball K is hit by the bat B from the side of the batter. Then, based on the information of the image captured by the high-speed camera 5, the calculation means 6 obtains the degree of vertical difference between the core position 1 of the bat B and the striking position 2 of the ball K.

  FIG. 19 is an image taken from the side of the batter. First, in the figure, the core position 1 of the bat B corresponds to the axial center of the bat. Further, it is assumed that the ball K is placed on the tee 4. On the other hand, the direction in which the bat B approaches to hit the ball K is indicated by an arrow. Reference numeral 2 denotes a hit position where the bat B hits the ball K. If the angle between the line connecting the hitting position 2 and the core position 1 of the bat B and the advancing direction of the bat B is θ, the θ is the core position 1 of the bat B and the hitting position 2 of the ball. This corresponds to the degree of misalignment in the vertical direction.

  The batter's batting form can be corrected or a bat suitable for each batter can be selected based on the degree of vertical misalignment obtained in this way.

It is a figure of the moment of hitting a ball with a bat. It is a side view of a misalignment measuring apparatus. It is a block diagram of a calculating means. It is a side view of a bat which shows vibration of a bat. It is a flowchart. It is the image which the high speed camera imaged. It is the image which the high speed camera imaged. It is the image which the high speed camera imaged. It is the image which the high speed camera imaged. It is the image which the high speed camera imaged. It is drawing for calculating | requiring the distance of the difference between the bat core position and the ball hitting position. This is the display content of the display means. It is a side view of a misalignment measuring apparatus. (Second Embodiment) It is a flowchart. (Second Embodiment) It is a side view of a misalignment measuring apparatus. (Third embodiment) It is a flowchart. (Third embodiment) It is a side view of a misalignment measuring apparatus. (Fourth embodiment) It is a flowchart. (Fourth embodiment) It is a figure which shows the extent of the core shift | offset | difference of the up-down direction of the bat core position and the ball hitting position. (Fifth embodiment)

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Bat | buck core position 2 Ball hitting position 3 Core misalignment measuring device 6 Calculation means 21 1st sensor (detection means)
22 Second sensor (detection means)

Claims (8)

A misalignment measuring device for measuring the degree of misalignment between the core position of a hitting ball bat and the ball hitting position by the bat,
A high-speed camera that captures the state of the ball hitting by the bat, and a calculation unit that obtains a distance between the core position of the bat and the ball hitting position based on the image of the high-speed camera. To measure misalignment. A misalignment measuring device that measures the degree of misalignment between the core position of a hitting bat and the striking position of the ball by the bat,
A high-speed camera that captures the state of the ball hitting by the bat, a detection unit that detects the time of the ball hitting by the bat, and the core position of the bat and the ball hitting position based on the image of the high-speed camera at the time of the hit And a misalignment measuring device, comprising: an arithmetic means for obtaining a difference distance from the center.   3. The misalignment measuring apparatus according to claim 1, wherein the ball is set stationary.   3. The misalignment measuring apparatus according to claim 1, wherein the ball is a pitched ball.   5. The misalignment measuring apparatus according to claim 1, wherein the detecting unit is provided on a ball or a bat and detects a point of time when the ball is hit. 6.   6. The misalignment measuring apparatus according to claim 1, wherein the high-speed camera is provided above a ball hitting position by a bat.   6. The misalignment measuring apparatus according to claim 1, wherein the high-speed camera is provided below a ball hitting position by a bat.   A high-speed camera that captures a shot of a ball hit by a bat from the side, and a calculation unit that obtains the degree of vertical misalignment between the position of the bat and the hit position of the ball based on the image of the high-speed camera. A misalignment measuring apparatus characterized by the above.

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