US2020238153A1PendingUtilityA1
Pitched ball trajectory providing device
Est. expiryJan 30, 2039(~12.5 yrs left)· nominal 20-yr term from priority
Inventors:Dong-Youn Shin
G06F 3/011G06F 1/163A63B 2071/0694A63B 2069/0006A63B 2220/806A63B 2071/0666A63B 2220/89A63B 71/0622A63B 69/0002A63B 2071/0647A63B 2024/0028G06F 15/16G06F 17/40A63B 71/0619A63B 71/0605
45
PatentIndex Score
0
Cited by
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References
0
Claims
Abstract
A pitched ball trajectory providing device includes a display; a support portion that fixes the display to a head of a user; a memory that stores a pitched ball trajectory prediction program; a communication module that receives pitched ball data from a pitched ball tracking device; and a processor that displays a pitched ball trajectory prediction result on the display according to execution of the pitched ball trajectory prediction program. The processor calculates a position of a ball around a home plate as time passes based on an initial position, an initial speed, and an initial acceleration of the ball included in the received pitched ball data for a predetermined time interval, and displays the pitched ball trajectory prediction result in which the calculated positions of the ball are sequentially arranged, on the display.
Claims
exact text as granted — not AI-modifiedWhat is claimed is:
1 . A pitched ball trajectory providing device of a user wearable type comprising:
a display; a support portion that fixes the display to a head of a user; a memory that stores a pitched ball trajectory prediction program; a communication module that receives pitched ball data from a pitched ball tracking device; and a processor that displays a pitched ball trajectory prediction result on the display according to execution of the pitched ball trajectory prediction program, wherein the processor calculates a position of a ball around a home plate as time passes based on an initial position, an initial speed, and an initial acceleration of the ball included in the received pitched ball data for a predetermined time interval, and displays the pitched ball trajectory prediction result in which the calculated positions of the ball are sequentially arranged, on the display.
2 . The pitched ball trajectory providing device according to claim 1 , wherein the pitched ball tracking device a radar-based data collection device or a camera-based data collection device.
3 . The pitched ball trajectory providing device according to claim 1 , wherein the processor displays a virtual strike zone above the home plate and displays the pitched ball trajectory prediction result together with the strike zone.
4 . The pitched ball trajectory providing device according to claim 1 , wherein the support portion is a spectacle-type wearable device or a helmet-type wearable device, and the display is a transparent display device.
5 . The pitched ball trajectory providing device according to claim 1 , wherein the processor calculates the position of the ball at any point after the pitch based on Equation 1 below,
While
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≤
t
≤
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x
(
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←
x
(
t
-
Δ
t
)
+
v
x
Δ
t
+
1
2
a
x
Δ
t
2
y
(
t
)
←
y
(
t
-
Δ
t
)
+
v
y
Δ
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1
2
a
y
Δ
t
2
z
(
t
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t
)
+
v
z
Δ
t
+
1
2
a
z
Δ
t
2
t
←
t
+
Δ
t
Equation
1
wherein x(t), y(t), and z(t) are position coordinates of the ball at time t, v x , v y , and v z are speeds of the ball, and a x , a y , and a z are accelerations of the ball.
6 . The pitched ball trajectory providing device according to claim 1 , wherein the processor calculates the position of the ball at any time after the pitch by reflecting a change in the speed and acceleration of the ball as time passes, based on Equation 2 below,
While
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≤
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≤
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f
x
(
t
)
←
x
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t
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Δ
t
)
+
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x
Δ
t
+
1
2
a
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t
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y
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+
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2
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v
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KC
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-
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a
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-
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a
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t
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Equation
2
wherein x(t), y(t), and z(t) are position coordinates of the ball at time t, v x , v y , and v z are speeds of the ball, a x , a y , and a z are accelerations of the ball, ω x , ω y , and ω z are angular speeds of the ball, C D is a drag coefficient, C L is a lift coefficient, g is a gravity acceleration,
K
=
-
1
2
ρ
A
m
,
ρ is an air density, m is a mass of a baseball, and A is a cross-sectional area of the baseball.
7 . The pitched ball trajectory providing device according to claim 1 , further comprising:
a camera that is coupled to the support portion, wherein the processor matches the generated pitched ball trajectory prediction result with a video captured by the camera for each generation time point and stores the matched data.
8 . A pitched ball trajectory providing method using a pitched ball trajectory providing device of a user wearable type comprising:
(a) receiving pitched ball data including an initial position, an initial speed, and an initial acceleration of a ball from a pitched ball tracking device; (b) calculating a position of the ball around a home plate as time passes based on the initial position, the initial speed, and the initial acceleration of the ball for a predetermined time interval; and (c) displaying a pitched ball trajectory prediction result in which the calculated positions of the ball are sequentially arranged, on a display of the pitched ball trajectory providing device of a user wearable type.
9 . The pitched ball trajectory providing method according to claim 8 , wherein in the step of (c), a virtual strike zone is displayed above the home plate and the pitched ball trajectory prediction result is displayed together with the strike zone.
10 . The pitched ball trajectory providing method according to claim 8 , wherein the pitched ball trajectory providing device of the user wearable type is a spectacle-type wearable device or a helmet-type wearable device, and the display is a transparent display device.
11 . The pitched ball trajectory providing method according to claim 8 , wherein in the step of (b), the position of the ball is calculated at any point after the pitch based on Equation 3 below,
While
Δ
t
≤
t
≤
t
f
x
(
t
)
←
x
(
t
-
Δ
t
)
+
v
x
Δ
t
+
1
2
a
x
Δ
t
2
y
(
t
)
←
y
(
t
-
Δ
t
)
+
v
y
Δ
t
+
1
2
a
y
Δ
t
2
z
(
t
)
←
z
(
t
-
Δ
t
)
+
v
z
Δ
t
+
1
2
a
z
Δ
t
2
t
←
t
+
Δ
t
wherein x(t), y(t), and z(t) are position coordinates of the ball at time t, v x , v y , and v z are speeds of the ball, and a x , a y , and a z are accelerations of the ball.
12 . The pitched ball trajectory providing method according to claim 8 , wherein in the step of (b), the position of the ball is calculated at any time after the pitch by reflecting a change in the speed and acceleration of the ball as time passes, based on Equation 4 below,
While
Δ
t
≤
t
≤
t
f
x
(
t
)
←
x
(
t
-
Δ
t
)
+
v
x
Δ
t
+
1
2
a
x
Δ
t
2
y
(
t
)
←
y
(
t
-
Δ
t
)
+
v
y
Δ
t
+
1
2
a
y
Δ
t
2
z
(
t
)
←
z
(
t
-
Δ
t
)
+
v
z
Δ
t
+
1
2
a
z
Δ
t
2
v
x
←
v
x
+
a
x
Δ
t
v
y
←
v
y
+
a
y
Δ
t
v
z
←
v
z
+
a
z
Δ
t
a
x
←
KC
D
v
·
v
x
+
KC
L
v
ω
(
ω
y
v
z
-
ω
z
v
y
)
a
y
←
KC
D
v
·
v
y
+
KC
L
v
ω
(
ω
z
v
x
-
ω
x
v
z
)
a
z
←
KC
D
v
·
v
z
+
KC
L
v
ω
(
ω
x
v
y
-
ω
y
v
x
)
+
g
t
←
t
+
Δ
t
Equation
4
wherein x(t), y(t), and z(t) are position coordinates of the ball at time t, v x , v y , and v z are speeds of the ball, a x , a y , and a z are accelerations of the ball, ω x , ω y , and ω z are angular speeds of the ball, C D is a drag coefficient, C L is a lift coefficient, g is a gravity acceleration,
K
=
-
1
2
ρ
A
m
,
ρ is an air density, m is a mass of a baseball, and A is a cross-sectional area of the baseball.
13 . The pitched ball trajectory providing method according to claim 8 , further comprising:
(d) matching the generated pitched ball trajectory prediction result to a video captured by a camera and storing the matched data, wherein the camera is coupled to the pitched ball trajectory providing device.
14 . A non-transitory computer-readable recording medium having a program recorded thereon for performing the method according to claim 8 on a computer.
15 . A non-transitory computer-readable recording medium having a program recorded thereon for performing the method according to claim 9 on a computer.
16 . A non-transitory computer-readable recording medium having a program recorded thereon for performing the method according to claim 10 on a computer.
17 . A non-transitory computer-readable recording medium having a program recorded thereon for performing the method according to claim 11 on a computer.
18 . A non-transitory computer-readable recording medium having a program recorded thereon for performing the method according to claim 12 on a computer.
19 . A non-transitory computer-readable recording medium having a program recorded thereon for performing the method according to claim 13 on a computer.Join the waitlist — get patent alerts
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