JP2001269428A - Hit sound-detecting system, and information storage medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hit sound-detecting system, and an information storage medium by which only hit sounds in a target detecting region can be easily and surely detected even when other hit sounds are generated in the surroundings. SOLUTION: This hit sound-detecting system detects hit sounds when a ball is hit. The hit sound-detecting system includes two microphones 34a and 34b, a hit sound-extracting section 43, and a hit sound-judging section 56. In this case, the microphones 34a and 34b collect hit sounds. The hit sound-extracting section 54 forms the detecting range for hit sounds of a specified range at a location located with equal distances from respective microphones 34a and 34b, by extracting respective sounds by providing a specified time difference when sounds collected by respective microphones 34a and 34b are extracted. The hit sound-judging section 56 judges that hit sounds are the hit sounds in the detecting range when an extracted sound stays in the specified period of time.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tapping sound detection system and an information storage medium, and more particularly to a tapping sound detection system and an information storage medium for detecting a tapping sound within a specific detection range.

[0002]

BACKGROUND OF THE INVENTION In general,
When detecting the flight distance and direction of a hit ball, the sensors that detect the XY coordinates of the two surfaces are used. If the ball passes through each sensor, the flight distance and direction of the ball are calculated based on the passage time and angle. It is possible to

However, if two sensors are used, the size of the device becomes large, and the sensor itself is expensive, so that the whole device becomes expensive.

Therefore, a sensor for detecting the XY coordinates is provided with one sensor.
First, it is conceivable to obtain three-dimensional coordinates by detecting a tapping sound.

[0005] In this case, if another tapping sound is generated in the vicinity, if another tapping sound is detected by mistake, an erroneous result will be produced.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a hitting sound detection system and an information storage medium which can easily and reliably detect only a hitting sound within a target detection range, even when other hitting sounds are generated in the surroundings. Is to provide.

[0007]

In order to achieve the above object, a hitting sound detection system according to the present invention is a hitting sound detection system for detecting a hitting sound when a ball is hit, wherein the hitting sound is collected. A plurality of microphones, and a predetermined time difference when extracting sounds collected by the respective microphones to extract each sound, thereby detecting a predetermined range of a tapping sound at a predetermined distance from each microphone. And a tapping sound judging means for judging a tapping sound within the detection range when the extracted sound is within a predetermined time.

Further, an information storage medium of the present invention is a computer-readable information storage medium storing information for detecting a hitting sound when hitting a ball, wherein the information collects the hitting sound. A plurality of sounding microphones and a predetermined time difference when extracting sounds collected by the respective microphones to extract respective sounds, thereby detecting a predetermined range of tapping sounds at a predetermined distance from each microphone. A tapping sound extracting unit that forms a range; and a tapping sound determining unit that determines that a tapping sound is within the detection range when the extracted sound is within a predetermined time. Features.

According to this invention, the tapping sound extracting means extracts the sounds collected by the respective microphones with a predetermined time difference, so that the tapping sound within a predetermined range is located at a predetermined distance from each microphone. By detecting only the tapping sound within the detection range, even if other tapping sounds are generated in the surrounding area, the detection range can be determined without detecting the surrounding tapping sound. Can be easily and reliably detected.

Therefore, for example, even when a number of people are hitting a ball side by side at a batting center or a game center, it is possible to detect only a specific hitting sound without being affected by the surrounding hitting sounds. It becomes possible.

In addition, when such a hitting sound detection system is applied to a batting game in which a ball is hit back,
The throwing direction of the ball can be calculated from the throwing point of the ball and one coordinate detection sensor.
The hitting point of the ball can be calculated from the pitching speed and the hitting timing based on the detected hitting sound.

Then, the flight direction and distance of the ball can be reliably calculated from the position and speed at which the returned ball passes through the coordinate detection sensor with the ball returning point as the origin.

For this reason, it is possible to minimize the number of coordinate detection sensors and contribute to miniaturization and cost reduction of the apparatus.

According to the present invention, the ball is thrown toward the detection range of the hitting sound, and the microphone intersects the throwing direction of the ball and intersects the throwing direction of the ball at a predetermined distance. It is preferable that at least one of the two microphones or the hitting sound extracting means is arranged to be operable after a predetermined time has elapsed after the ball is thrown.

[0015] With this configuration, a detection range is formed along the ball throwing direction by the two microphones, and at least one of the microphones or the hitting sound extraction means has passed a predetermined time after the ball thrown. After the ball is hit, the hitting sound can be detected when the thrown ball reaches the hitting range, and as a result, the hitting sound generated until the hit ball reaches the hitting range The detection is invalidated and the detection range is narrowed to enable more accurate detection.

In this invention, it is preferable that at least one of the microphones or the tapping sound extracting means is enabled only for a predetermined time.

By adopting such a configuration, detection of another hitting sound after hitting the ball is not performed, thereby enabling more accurate detection.

Further, in such an invention, it is preferable that three or more microphones are provided at a predetermined distance from the detection range so that a detection range of a spot-like hitting sound can be formed.

With such a configuration, a spot-like detection range can be formed by three or more microphones, whereby a target tapping sound can be detected simply and reliably.

In the present invention, the information stored in the information storage medium may be a program for realizing each of the above means, or may be a combination of program data.

The information (for example, a program) for executing the above means is information (for example, a program) usable by a computer and includes a processing routine for realizing (executing) the above means. There may be.

Further, information for executing each means is as follows:
The information may be stored in one information storage medium or may be stored across a plurality of information storage media.

[0023]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a schematic configuration diagram according to an embodiment of a simulator to which a hit sound detection system of the present invention is applied.

In FIG. 1, this simulator 10
It is for playing a batting game, and includes a display 12, a pitching device 14, a throw detection sensor 16,
It has a coordinate detecting device 18, a hit detecting device 20, and a game device main body 22.

The display 12 displays a batting game image. The batting game image includes various images such as an image of a pitcher or a fielder, an image of a ground of a baseball stadium, a background image, and various effect images. Images are included.

The display 12 is located on the pitching device 14 side, and is installed toward the batter box 23.

The pitching device 14 is set at a predetermined distance from the batter box 23 at the ball throwing position side, and shoots the ball 24 toward the batter box 23 at the hitting position side, and throws a ball at the batter 26. It is supposed to do.

The throwing-in detection sensor 16 corresponds to the throwing-in detecting means, and is provided near the pitching device 14 and
The throwing timing of the throwing ball 24 from the throwing point P1 at the throwing point P1 is detected.

The coordinate detecting device 18 corresponds to coordinate detecting means.
4 for detecting the passing position, and has a pair of columns 28 arranged facing each other, and has four laser sensors 30 provided at upper and lower positions opposed to each other.

A vertical sensing area 32 is formed on the coordinate detecting device 18 by the four laser sensors 30, and the ball 2 passing through the vertical sensing area 32 is formed.
4 is detected.

That is, a pitch from the pitching device 14 passes through the vertical sensing area 32 of the coordinate detecting device 18 to detect a pitch passing position P2, and the coordinate detecting device 1
8 and the batter 2 at the batter box 22
The hit ball hit back at the hitting position (turning point) P3 by 6 passes through the vertical sensing area 32 of the coordinate detecting device 18 so that the hit ball passing position P4 is detected.

The hitting detection means 20 corresponds to a hitting sound detection system, and detects a hitting sound when hitting the ball 24. As shown in FIG.
a, 34b, a tapping sound extraction unit 54, and a tapping sound determination unit 56.

The two microphones 34a, 34b are
It is provided in the vicinity of the batter box 23, and is capable of collecting hitting sounds for the ball 24.

More specifically, each of the microphones 34a, 3a
4b, the ball 2
4 and are arranged at the same distance from each other.

The striking sound extraction unit 54 corresponds to a striking sound extracting means. When extracting sounds collected by the microphones 34a and 34b, a predetermined time difference is provided between the sounds and the sound is extracted. ing.

In this manner, a predetermined range of hitting sound detection range is formed along the throwing direction of the ball 24, so that other surrounding hitting sounds are not detected.

Further, at least one of the microphones 34a, 34b or the striking sound extraction unit 54 is placed for a predetermined time after the ball 24 is thrown, for example, a passing position P2 after the ball 24 thrown from the throwing device 14 passes the throwing point P1. Is activated after a lapse of time from when the ball reaches the position just before the home base 38, and the detection range of the hitting sound is changed to the ball 2
By narrowing to just before the home base 38 in the throwing direction of 4, the detection of other surrounding tapping sounds is excluded, and more accurate tapping sound detection is enabled.

Further, each of the microphones 34a, 34b
Alternatively, at least one of the hitting sound extraction units 54 can operate only for a predetermined time, for example, a time corresponding to the time from when the ball 24 passes just before the home base 38 to immediately after the home base 38, so that the rear of the home base 38 can be operated. The detection range is narrowed so that other surrounding tapping sounds are not detected, thereby enabling more accurate detection of tapping sounds.

It is also possible to accurately detect a tapping sound by installing three or more microphones at the same distance from the detection range so that a spot-like tapping sound detection range can be formed.

By doing so, for example, when the present simulator 10 is installed at a batting center or the like, it is possible to discriminate one's hammering sound from that of another person and to reliably detect one's hammering sound. Become.

The principle of detecting the hitting sound will be described below.

Here, it is assumed that the one-dimensional space (on a straight line) is used for convenience.

First, as shown in FIG. 6A, the sound of S located at the same distance L0 from the two microphones 34a and 34b is different from the other sounds by utilizing the fact that there is no difference in detection time between the microphones 34a and 34b. Can be sorted.

When the microphones 34a and 34b are not equidistant from the hit point, they can be made equal in terms of signal by combining delay circuits.

Next, when an allowable range of Lx is given to the detection time of the microphones 34a and 34b, L0 ± (1/2)
Lx) is the detection range.

By changing the expression of this state, FIG.
As shown in (2).

As shown in FIG. 6B, the detection range is from the distance L1 to the distance L1 + Lx when viewed from the microphone 34a.
The distance L1 + Lx from 1 is the detection range.

Therefore, the sounds of S1 and S2 within the range of Lx can be detected.

When this state is considered in a two-dimensional space (plane), as shown in FIG.
4b, a circle having a radius L1 is drawn and a circle (Ln) in which the radius is increased by Lx is considered.
_It is inside the intersection of _{(n + 1)} .

When the intersections of the circle Ln and the circle L _{(n + 1)} are connected by a continuous line, a detection range 36 as shown in FIG. 7B is obtained.

The detection range 36 becomes like a concave lens in a three-dimensional space.

As shown in FIG. 8, when the home base 38 is placed in the detection range 36, even if there is a tapping sound of another person such as a batting center, the user can identify his own tapping sound.

When combined with the timing at which the ball 24 flies, the detection range 36 can be further narrowed.

For example, by enabling the microphones 34a and 34b only when the ball 24 comes near the home base 38, the detection range 36 can be narrowed in the throwing direction of the ball 24.

Further, when the three microphones 34a, 34b, 34c are equidistant as shown in FIG. 8 (1), a hexagon (middle and narrow) is formed at the center as shown in FIG. 8 (2). A hexagonal detection range 36 can be formed.

As described above, when a plurality of microphones are used, if they are combined by AND or OR, various ranges of shapes can be obtained by the number of microphones.

If the allowable range is changed for each combination of microphones, the shape of the detection range can be changed in various ways.

The game device main body 20 includes the simulator 10
The control of each unit and a predetermined process are performed.

FIG. 2 is a schematic functional block diagram of the game apparatus main body 22.

In FIG. 2, the game apparatus main body 22 includes a processing unit 40, a storage unit 42, an information storage medium 44, a passing time detection unit 46, an image generation unit 48, and a sound generation unit 50.
And a sound output unit 52.

More specifically, the processing unit 40 performs various processes such as control of the entire device, instructions to mail in each block in the device, game calculation, and the like.
PU (CISC type, RISC type), DSP, ASIC
(A gate array or the like) or a given program (game program).

The storage unit 42 includes the processing unit 40 and the image generation unit 4
8. A work area for the sound generation unit 50 and the like, and its function can be realized by hardware such as a RAM.

The information storage medium 44 can read the information storage medium by a computer, and stores information such as programs and data.

In the present embodiment, a ball is thrown at the player, the player hits the ball back with a bat, and a batting game for measuring how much the ball has flew in the direction of the hit ball is performed. The information is stored in the information storage medium 44.

The information storage medium for executing the batting game includes at least a throw detecting means for detecting a throw timing at a throw point of a thrown ball, and a coordinate detecting means for detecting a passing position at the time of throw and return of the thrown ball. Means, after the ball has passed through the coordinate detecting means, a return detecting means for detecting a ball returning timing, and a passage from the throwing timing detected by the throwing detecting means to the passage of the ball thrown into the coordinate detecting means. Time, a passing time detecting means for detecting a passing time of the ball from the returning timing detected by the returning detecting means to a passing of the ball which has returned the coordinate detecting means, and a throwing time detected by the passing time detecting means. Calculate the speed of the thrown ball from the ball passing time,
The ball return point is calculated from the speed of the thrown ball, the throw point of the ball, the passing position of the thrown ball detected by the coordinate detecting means, and the hitting timing of the ball detected by the hitting detecting means. Calculating the speed of the hit ball from the passing time of the hit ball detected by the passing time detecting means, the speed of the hit ball, the hitting point, and the passing of the hit ball detected by the coordinate detecting means. Information for realizing a flight direction and a flight distance of the ball hit back from the position and a calculation means is included.

In particular, the information for realizing the hit detection means includes a plurality of microphones that collect at least a tapping sound and a predetermined time difference when extracting the sound collected by each of the microphones. A tapping sound extraction means for forming a detection range of a predetermined range of tapping sound at a position at a predetermined distance from each microphone, and within the detection range when the extracted sound is within a predetermined time. And information for realizing a tap sound determining means for determining the tap sound.

Further, the ball is thrown toward the detection range of the hitting sound, and the two microphones are arranged at equal distances across the ball hitting position and intersecting the throwing direction of the ball. Information enabling at least one of the microphone or the hit sound extracting means to operate after a predetermined time has elapsed after the throw of the ball; and information enabling at least one of the microphones or the hit sound extracting means to operate only for a predetermined time. The microphone includes information such that three or more microphones are installed at a predetermined distance from the detection range so that a detection range of a spot-like hitting sound can be formed.

Also, information for realizing a predetermined baseball stadium parameter and a determination means for determining a drop position of a hit ball based on the parameter, a parameter of a member of a specific baseball team and a drop position of a hit ball based on this parameter. The information also includes information for realizing the determination means for performing the ball catching determination in.

Further, in the information storage medium 44, various game image data such as a pitching image of a pitcher, a ball catching image of a fielder, an image of a baseball stadium, and a background image for playing a batting game, and voice data for a batting game. , A batting game execution program, an effect program, and the like are also stored as information for performing the batting game.

The functions of the information storage medium 44 are as follows: an optical disk (CD, DVD), a magneto-optical disk (MO),
It can be realized by hardware such as a magnetic disk, a hard disk, a magnetic tape, and a semiconductor memory (ROM).

The processing section 40 performs various processes based on information such as programs and data stored in the information storage medium 44.

A part or all of the information stored in the information storage medium 44 is stored in the storage unit 4 when the power of the apparatus is turned on.
2 will be transferred.

The transit time detecting section 46 corresponds to transit time detecting means.
The time when the thrown ball passes between the throw detection sensor 16 and the coordinate detecting device 18 and the time when the ball passes through the coordinate detecting device 18 after hitting are detected and transmitted to the processing unit 40.

The image generating section 48 generates various images in accordance with an instruction from the processing section 40 and outputs the images to the display 12, and its function is to function as an image generating ASIC or C.
It can be realized by hardware such as PU and DSP, a given program (image generation program), and image data.

The image generated by the image generator 48 is output on the display 12.

The sound generation unit 50 generates various sounds in accordance with an instruction from the processing unit 40 and outputs the generated sounds to the sound output unit 14. The function of the sound generation unit 50 is as follows.
It can be realized by hardware such as SP, a given program (sound generation program), and audio data (waveform data and the like).

The sound generated by the sound generation unit 50 is output by the sound output unit 52.

Here, the processing section 40 also functions as the game calculation section 60.

The game calculation section 60 is equivalent to a calculation means, and calculates a flight distance, a flight direction, a throwing direction, a throwing speed, a hitting point, a throwing course and the like of a hit ball.

This state will be described with reference to FIGS.

FIG. 4 is a plan view of the simulator 10, and FIG. 5 is a side view thereof.

The flight distance and flight direction of the hit ball
It can be calculated from the passing time of the ball 24 from No. 3 to the passing position P4 of the hit ball, and the vertical and horizontal angles θ1 and θ2 between the hitting position P3 and the passing position P4 of the hit ball.

The return time is determined by the microphone 34a,
It can be detected by collecting sound at 34b.

Assuming that the hitting position P3 is fixed, it is possible to calculate the approximate flight distance and flight direction. However, the passing time between the pitch point P1 and the pitch passing position P2, the microphone 34a, By considering the return timing detected by 34b, a more accurate return position P3 can be calculated.

That is, the speed of the thrown ball 24 is calculated from the passing time of the thrown ball 24 detected by the passing time detecting section 46, and the speed of the thrown ball 24 is detected by the throwing point P 1 and the coordinate detecting device 18. The hit point of the ball 24 can be calculated from the passing position P2 of the thrown ball 24 and the hit timing of the ball 24 detected by the hit detection unit 20.

Then, based on the passing time of the hit ball detected by the passing time detecting unit 46, the ball 2 hit back
And calculating the flight direction and distance of the hit ball 24 from the speed of the hit ball 24, the hit position P3, and the passing position P4 of the hit ball detected by the coordinate detecting device 18. Can be.

Here, the principle of detecting the flight distance of a hit ball using the coordinate detecting device 18 will be described in detail.

The positions of the balls required to obtain the flight distance are as follows.

P ₁ : pitch point P ₂ : area sensor passing (when pitching) P ₃ : hitting point P ₄ : area sensor passing (when hitting ball) P ₅ : ball drop position

Among them, P ₁ is to fix the position on the measurement, the time there is set to zero, the origin on the xy plane is set, and the height is set to h.

The positions and times of P ₂ and P ₄ are detected when passing through the coordinate detecting device 18.

[0093] P ₅ is a drop position to the surface of the ball, P ₃
Distance from to P ₅ is the flying distance of the ball.

However, in reality, it is necessary to consider the air resistance. Introducing a drag coefficient that is proportional to the square of the speed,
It almost matches the actual flight distance.

The times at the respective points P _{1 to} P ₅ are t ₁ , t ₂ , t ₃ , t ₄ , and t ₅ , respectively.

Here, x _n , y _n , and z _n are coordinates at P _n , and v _nx , v _ny , and v _nz are initial _velocities at P _n in the direction of each coordinate axis.

The unknown coordinates are P ₃ and P _5. First, the coordinates of P ₃ are obtained.

The coordinate value is represented by the following equation.

[0099]

(Equation 1) Initial speed at P1 is as follows, by substituting these coordinates of P ₃ is uniquely determined.

[0100]

(Equation 2) Then, the coordinates of P ₅ is a drop position of the ball can be expressed by the following equation.

[0101]

(Equation 3) The initial velocity at P ₃ is

[0102]

(Equation 4) Although, because T ₅ is unknown, the coordinates are not determined only by substituting these.

Here, since P ₅ is the surface of the earth, and z ₅ = 0,

[0104]

(Equation 5) I can put it.

[0105] This is a two-dimensional equation for the unknowns T _5.

By solving this equation, two solutions of T ₅ are obtained. Since t ₅ > t ₃ , T ₅ is obtained from equation (9).
Choose a solution such that is positive.

By substituting T ₅ into the equations (10) to (12), the coordinates of the landing point P ₅ can be obtained.

Since the position immediately below the input point is the origin of the xy plane, the distance L from the return position is the flight distance as shown in equation (17).

[0109]

(Equation 6)

The throwing direction of the throw is determined by the thrown ball 24
Can be calculated from the vertical angle and the horizontal angle at the pitch P1 and the ball passing position P2.

The course of throwing the ball can be calculated from the throwing direction of the pitch and the timing of hitting.

The game calculation section 60 includes, in addition to the above calculations, a coin (price) reception process, a game progress process, a calculation process for synthesizing an image, a rendering process, a process for displaying characters, a game A process of calculating the result (game score, score) or various game calculation processes such as a game over process is performed by using a signal from the pitching device 14, a signal from the coordinate detecting device 18, or information or information from the passing time detecting unit 46. This is performed based on a program or the like stored in the storage medium 44.

The game calculation section 60 also functions as a determination section 62, a screen rendering section 64, and a recording section 66 as shown in FIG.

The determining section 62 corresponds to a determining means, and determines a hitting ball based on a parameter of a hypothetical baseball field or a parameter of a predetermined baseball team.

For example, the result of calculating the flight distance and flight direction of the hit ball is checked against predetermined baseball stadium parameters, and 1
When the vehicle has traveled 20 m, it is determined that the home run is overfenced.

Also, for example, an infield fly, an outfield fly,
In the case of an infield goro, liner, or the like, a ball catching determination is made based on the parameters of a predetermined baseball team member as to whether or not the member at the position where the ball flew has caught up and hit the ball.

[0117] The screen rendering unit 64 controls the pitching motion of the pitcher at the time of pitching, the character of "home run" when the ball is a home run, or the image of the pitcher throwing a glove, and the infield / outfielder at the time of hitting the ball. Various screen effects such as images showing a state of catching and catching a ball are performed.

Further, effects such as displaying the course of the pitch, the flight distance and direction of the hit ball, and the like are also provided.

The storage section 66 records the pitching course, the flight distance of the hit ball, the flight direction, and the like, and determines which pitching course is strong or weak, how long the ball is hit at which course, and the like. The display can be used to diagnose the impact.

As described above, the pitching course and the flight distance of the hit ball,
By calculating the flight direction and the like, and judging the hitting ball based on the parameters of a predetermined baseball field or baseball team member, a realistic batting game can be enjoyed, and the insertion detection sensor 16 and the coordinate detection device 1
Such a batting game can be easily realized only by using the hitting means 8 and the hit detection means 20.

The present invention is not limited to the above embodiment, but can be modified into various forms within the scope of the present invention.

For example, although a laser sensor is used in the coordinate detecting device, the present invention is not limited to this example. Sensing may be performed in a matrix using an optical sensor. If so, various coordinate detecting means can be used.

Further, the striking sound is collected by using a microphone as the striking detection means. However, a pressure sensor may be provided on the bat, and the striking time may be detected by the pressure sensor.

In the above embodiment, the simulator for performing the batting game has been described. However, the present invention is not limited to this example, and the simulator can be used as a ball measuring system for measuring the flight distance of a hit ball. A simulator using such a system can also be used.

Further, in the above embodiment, the simulator is used for a baseball batting game.
The present invention is not limited to this example, and can be applied to various simulators and games such as soccer, tennis, volleyball, and the like, as long as the ball is thrown back.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram according to an embodiment of a simulator to which the present invention is applied.

FIG. 2 is a schematic functional block diagram of a game device main body according to the present invention.

FIG. 3 is a functional block diagram of a return detection unit.

FIG. 4 is a schematic plan view of a simulator according to the present embodiment.

FIG. 5 is a side view of FIG. 4;

FIG. 6 (1) is an explanatory diagram showing the principle of hitting sound detection of the hit-back detecting means in a one-dimensional space, and FIG. 6 (2) is an explanatory diagram showing a state in which the detection time is different from the state of (1). is there.

7A is a diagram showing the state of FIG. 6B in a two-dimensional space, and FIG. 7B is an explanatory diagram showing a detection range of FIG.

FIG. 8 is an explanatory diagram showing a state where a home base is placed in a detection range of FIG. 7 (2).

FIG. 9A is an explanatory view showing a detection range when three microphones are used, and FIG. 9B is a three-dimensional view of the detection range.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Simulator 14 Throwing device 16 Throwing detection sensor 18 Coordinate detection device 20 Bounce detection means 22 Game device main body 23 Batter box 24 Ball 26 Butter 30 Laser sensor 32 Vertical sensing area 34a, 34b, 34c Microphone 36 Detection range 44 Information storage medium 46 Passage Time detection unit 54 Hitting sound extraction unit 56 Hitting sound measurement unit 60 Game calculation unit 62 Judgment unit P1 Throwing point P2, P4 Passing position P3 Hitting position P5 Falling position θ1 Vertical angle θ2 Horizontal angle

Claims (8)

[Claims] 1. A hitting sound detection system for detecting a hitting sound when hitting a ball, comprising: a plurality of microphones for collecting the hitting sounds; and a plurality of microphones for extracting sounds collected by each of the microphones. A tapping sound extraction unit that forms a detection range of a tapping sound in a predetermined range at a position at a predetermined distance from each microphone by providing a time difference between the sounds and the extracted sound within a predetermined time. A tapping sound determination system that determines a tapping sound within the detection range in a certain case. 2. The ball according to claim 1, wherein the ball is thrown toward the detection range of the hitting sound, and the microphone intersects with the throwing direction of the ball across a hitting position of the ball and is positioned at a predetermined distance. Wherein at least one of the microphones or the tapping sound extraction means is enabled after a predetermined time has elapsed after the ball is thrown. 3. The striking sound detection system according to claim 2, wherein at least one of the microphones or the striking sound extraction means is enabled only for a predetermined time. 4. The striking sound detection system according to claim 1, wherein three or more microphones are installed equidistant from the detection range so as to form a spot-like striking sound detection range. 5. A computer-readable information storage medium storing information for detecting a hitting sound when hitting a ball, wherein the information includes: a plurality of microphones for collecting the hitting sound; A tapping sound extraction means for forming a predetermined range of tapping sound detection range at a position at a predetermined distance from each microphone by providing a predetermined time difference when extracting sounds collected by each microphone; An information storage medium, which includes information for realizing: a tapping sound determining unit that determines that the extracted sound is within the detection range when the extracted sound is within a predetermined time. 6. The ball according to claim 5, wherein the ball is thrown toward the detection range of the hitting sound, and the microphone intersects with the throwing direction of the ball across a hitting position of the ball and is positioned at a predetermined distance. An information storage medium, wherein at least one of the microphones or the hitting sound extracting means is operable after a predetermined time has elapsed after the insertion of the ball. 7. The information storage medium according to claim 6, wherein at least one of the microphones or the tap sound extracting means is operable only for a predetermined time. 8. The information storage medium according to claim 5, wherein three or more microphones are provided at a predetermined distance from the detection range so as to form a detection range of a spot-like hitting sound.