Augmented Sports of Badminton by Changing Opening Status of Shuttle’s Feathers Takumi Yamamoto*, Ryohei Baba*, Yuta Sugiura (* Contribution equally) In Proceedings of the 15th Asia Pacific Workshop on Mixed and Augmented Reality (APMAR2023) , IEEE, August 18-19, 2023, Taipei, Taiwan.

1. Augmented Sports of Badminton by Changing Opening
Status of Shuttle’s Feathers
K e i o U n i v e r s i t y
* E q u a l C o n t r i b u t i o n s
Takumi Yamamoto*, Ryohei Baba*, Yuta Sugiura
18th August 2023, APMAR2023

2. • Using digital technology for supporting the sports
• Assistant the coaching
• Assistant the refereeing decisions
• Augmented Sports
• Use digital technology to extend the sport itself
• Enhance the entertainment
2
Background

3. 3
Related Work: Augmented Sports
Gas ejection ball [1]
Ultrasound
phased Array [3]
Flying ball
based on quadcopter [2]
• Changing the trajectory of balls
Ball Field
[1] Ohta, Tomoya, et al. "TAMA: development of trajectory changeable ball for future entertainment." Proceedings of the 5th Augmented Human International Conference. 2014.
[2] Nitta, Kei, Keita Higuchi, and Jun Rekimoto. "HoverBall: augmented sports with a flying ball." Proceedings of the 5th Augmented Human International Conference. 2014.
[3] Morisaki, Tao, et al. "Hopping-pong: Changing trajectory of moving object using computational ultrasound force." Proceedings of the 2019 ACM International Conference on Interactive Surfaces and Spaces. 2019.

4. • Idea: Shape-changing shuttle:
• By changing the feather shape, air resistance can be changed.
• Usage Scenarios by changing the flying distance
• Adjusting the flying distance depending on the individual strength.
4
Proposal
Augmented sports by changing the flying distance of shuttle
Concept of our research Usage scenario

5. • Shuttle (18cm)
• Sixteen Strings
• A servo motor in the shuttle changes the opening status
5
Device: Shape Changing Shuttle
Principle of opening status Our proof-of-concept prototype

6. • Two experiments
• Experiment 1: Measure the distance depending the servomotor’s angles
• Experiment 2: Measure the distance by changing the opening status in the air
• Launching 10 times on each conditions
• Launching Device
• Unified distance by pulling to a set line
6
Experiment
Launching device

7. • 5 servomotor’s angles
• 0 deg, 60 deg，90 deg，120 deg，
180 deg
• Result
• Significant difference was observed
except at 120 deg and 180 deg.
7
Experiment1
Result

8. • 4 Conditions:
• Result:
• Significant difference was observed
except at condition b and condition c.
8
Experiment2
Result
a b c d
4 conditions

9. • Challenges for practical use:
• Durability
• Large size
• User Study
9
Limitation and Future work

10. 10
Summary
Background Using digital technology for sports
Related Work Changing the trajectory of balls
Proposal
Changing the trajectory of shuttle by changing the
opening status
Application
Adjusting the flying distance depending on the individual
strength.
Implementation A shuttle with a servo motor
Evaluation Measure the distance using a launching device
Result
We can change the flying distance by changing the servo
moter’s angle.
Limitation Challenges for practical uses