KR20100088112A - The automatic system(method) of distinguish between strike and ball(strike zone) using ultrasonic wave in baseball - Google Patents

Abstract

The present invention uses ultrasonic waves having a frequency of 20kHz to 10MHz, and consists of an ultrasonic transmitter, a receiver, a data cable (wireless cable), a measurement program, and the like. Several ultrasonic transmitters are installed on the home plate of the baseball stadium. Then, a plurality of ultrasonic receivers are provided on the left and right lines of the home plate of the ground having an angle of 90 degrees with the progress direction of the baseball. When a baseball of various pitches passes through any part of the home plate, the ultrasonic wave receiving unit receives ultrasonic waves reflected from the surface of the baseball through which the transmitted ultrasonic waves rapidly pass, and the measurement program analyzes them. Done. The received ultrasonic waves automatically determine the height of the baseball from the ground, whether the home plate (base plate) passes. In this way, the time required to determine the strike-ball (strike zone) judgment is within 0.5 seconds.
[Index] Baseball Game, Strike Zone Automatic Classification

Description

{The automatic system (method) of distinguish between strike and ball (strike zone) using ultrasonic wave in baseball}

The present invention is an effective method for automatically determining the strike-ball (strike zone) of a baseball by using an ultrasonic wave, and comprises an ultrasonic wave transmitting unit, a receiving unit, and a distance measuring program. By installing the ultrasonic transmitter and receiver on the edge of the home plate (base) of the baseball field, the receiver receives ultrasonic waves reflected by the reaction from the transmitter and the fast-moving baseball, and uses the cable (or wireless) to distance the data. A system that automatically determines strike-balls (stroke zones) by inputting them to a measurement program.

Recently, the baseball stadium has been one of the most popular sports in Korea. However, batters and referees, coaches and referees during the game are suspended due to the strike-ball (strike zone) judgment, while players are stopped, the coaches are reducing the sports fun of the audience. This is regarded as a factor that hinders the success and development of professional baseball in the long run. In baseball games, strike-ball (strike zone) judgments are generally made by the referee and visually applied to the ball count. However, if the strike-ball (strike zone) determination is performed by using a more accurate mechanism, excluding the risk of human visual judgment error, etc., the strike-ball (strike zone) determination through accurate data is automatically performed. As the strike-ball (strike zone) judgment is gradually reduced, the game will be prevented from stopping, stopping the player, and leaving the coach, so that the baseball game can be enjoyed even more.

In baseball games, strike-ball (strike zone) judgments are generally made by the referee and visually applied to the ball count. However, due to the human visual judgment error, frequent strike-ball (strike zone) judging application, which leads to the interruption of the game, the departure of the player, the manager's departure. Thus, the system of the title automatically solves this problem, and a more interesting baseball game watching can be achieved.

The present invention uses an ultrasonic wave having a frequency of 20kHz ~ 100MHz, and consists of an ultrasonic transmitter, a receiver, a data cable (wireless cable), a measurement program and the like. Several ultrasonic transmitters are installed on the home plate of the baseball stadium. Then, a plurality of ultrasonic receivers are provided on the left and right lines of the home plate of the ground having an angle of 90 degrees with the progress direction of the baseball. If a baseball of various pitches passes through any part of the home plate, the ultrasonic wave receiving part receives the ultrasonic wave reflected from the surface of the baseball which passes quickly, and the measurement program analyzes it. Done. The received ultrasonic waves automatically determine the height of the baseball from the ground, whether the home plate (base plate) passes. In this way, the time required to determine the strike-ball (strike zone) judgment is within 0.5 seconds.

a. It only reacts to a baseball passing over the home plate, and the height of the ground and the baseball is known.

b. When the baseball player's height is input into the program, the baseball's upper and lower strike zones are automatically recognized, and the upper and lower strike zones are automatically included in whether the ground and baseball height values obtained in the above paragraph a are included in the upper and lower strike zones. It can be divided into

c. The baseball recognizes only the baseball passing through the home plate (home base) to which the ultrasonic transmitter and receiver are attached, and the baseball not passing through the home plate is treated as a ball.

d. The right and left strike zones can be automatically distinguished by the method of c.

e. The measurement program can automatically determine the upper, lower, left and right strike zones described in the above paragraphs b and d, and can automatically handle strike-ball (strike zone) determination.

1 is the case of the left and right strike zone (view from above)
2: In the case of up and down strike zones (view from the side)
[Figure 3] Arrangement description of the transmitter-receiver (ultrasound module) of the ultrasonic wave
4 is an explanation of the arrangement of the ultrasonic transmitter-receiver (ultrasound module) in the home plate (base).
5 is an explanation of the transmission angle of the ultrasonic transmitter in the home plate (base).

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

1. Fig. 1 is a view of the strike zone in the domestic baseball (professional and flax) rules. In order to receive a strike decision when a pitcher pitches a baseball ball at the pitching position (5) and passes through the home plate, the pitcher pitches between 1 and 2, 1 to 4 and 3 times. You must pass between 4 and 3 times. (Based on right and left strike zone judgment)

2. Figure 2 is a side view of the strike zone in the domestic baseball (professional and flax) rules. In order to receive a strike decision when a pitcher pitches a baseball ball at the pitching position (5) and passes through the home plate, the pitcher pitches between 1 and 2, 1 to 4 and 3 times. You must pass between 4 and 3 times. (Based on top and bottom strike zone judgment)

3. Fig. 3 illustrates the alignment of the ultrasonic transmitter-receiver (ultrasound module) for measuring a baseball ball pitched by a pitcher on a home plate made of a white rubber sheet. In the case of Fig. 3A, one ultrasonic transmitter is placed on each side of the ultrasonic module, and 2 to 2000 ultrasonic receivers are aligned in a straight line. In the case of Fig. 3-B, the two to 1000 ultrasonic transmitters and the two to 1000 ultrasonic receivers are regularly aligned by one or two or more. In the case of Fig. 3-b, 2 to 1000 ultrasonic transmitters and 2 to 1000 ultrasonic receivers are irregularly crossed and aligned in a straight line. At this time, Figure 3-a. Figure 3-b. In the case of Fig. 3-C, the frequency of the ultrasound is set to be the same or different. This is to accurately determine the position of the baseball pitched pitcher.

4. Figure 4 illustrates the alignment of the ultrasonic transmitter-receiver (ultrasound module) in the home plate (base plate). In the case of Fig. 4A, the home plate (base plate) on which the ultrasonic module is mounted is seen from the front side (pitcher position). In the case of Fig. 4-B, the home plate (base) equipped with the ultrasonic module is seen from above. In the case of Fig. 4-C, the home plate (base) equipped with the ultrasonic module is viewed from the side. At this time, the installation number of the ultrasonic module on the home plate (main base) is installed 2 ~ 100, and the ultrasonic frequency for each ultrasonic transmitter is the same or different.

5. The transmission angle of the ultrasonic transmitter mounted on the ultrasonic module is shown in FIG. This is to accurately measure whether the pitcher's pitched baseball is passing over the home plate.

6. At this time, the properties of the ultrasonic waves are as follows.

-Velocity of sound wave V = 331 + 0.6t (t: Celsius temperature) m / s

-V = 331 + 0.6 x 15 = 340m / s when the temperature of baseball field is 15 degrees Celsius

-For 180cm adults, when the upper and lower strike zones are about 50cm (knee) ~ 110cm (armpit) from the ground, the time taken from the transmission of the ultrasound to the reception is as follows.

-The time it takes for the ultrasound wave from the transmitter to reflect back to the baseball passing about 50cm below the strike zone

Time (SL) = [(0.5m x 2) / 340] sec / m = 0.00294sec

-The time it takes for the ultrasound wave from the transmitter to reflect back to the baseball passing about 110cm of the strike zone on the top and return to the receiver

Time (SH) = [(1.1m x 2) / 340] sec / m = 0.00647sec

The calculated time is inputted to the program of the batter's height (key), and the upper and lower strike zones are measured differently according to the batter's height (key).

7. The strike zone of the baseball ball pitched by the pitcher is determined as follows.

-The division of the left and right strike zone described in Figure 1 can be seen by the ultrasonic signal received by the receiver whether the pitcher pitched baseball ball passed the home plate by the method described in paragraphs 3, 4 and 5.

-The division of the upper and lower strike zones described in FIG. 2 can be seen by the ultrasonic signal (time measurement) reflected by the baseball ball whether the pitcher pitched the baseball ball passed through the upper and lower strike zones by the method described in Section 6. (Definition of Strike Zone: A space on the base plate with the horizontal line at the midpoint of the top of the batter's shoulder and the top of the uniform's pants as the upper limit, and the lower line to the bottom of the knee)

-The accurate technical determination of strike zones in baseball games using ultrasound can solve many of the problems mentioned in [Background Art] above, and the baseball sport that is popular with many people will be a more beloved sport.

Claims (4)

Sorting method of the transmitter-receiver (ultrasound module) of the ultrasonic wave [FIG. 3] Ultrasonic Transmitter-Receiver (Ultrasonic Module) Alignment Method in Home Plate (Home Base) [Figure 4] Transmission Angle of Ultrasonic Transmitter in Home Plate (Home Base) [Figure 5] How to measure the passing ball by installing an ultrasonic transmitter-receiver (ultrasound module) on the home plate

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