[ Special Issue : Seoul Tech Capstone Design ]

Journal of the Korean Society of Manufacturing Technology Engineers - Vol. 27, No. 3, pp.278-285

ISSN: 2508-5107 (Online)

Print publication date 15 Jun 2018

Received 26 Feb 2018 Revised 11 Apr 2018 Accepted 30 Apr 2018

DOI: https://doi.org/10.7735/ksmte.2018.27.3.278

핸드사인 장갑으로 조정하는 미니어처 3휠 피칭머신 설계

손기정^a ; 김성한^a ; 이종록^a ; 김성걸^a^{, *}

Design of Miniature Three-Wheel Pitching Machine Controlled by Hand-Sign Glove

Ki Jung Son^a ; Seong Han Kim^a ; Jong Rok Lee^a ; Seong Keol Kim^a^{, *}

aDepartment of Mechanical System Design Engineering, Seoul National University of Science and Technology, 232, Gongneung-ro, Nowon-gu, Seoul 01811, Korea

Correspondence to: ^*Tel.: +82-2-970-6855, Fax: +82-2-974-8270, E-mail address: rhett@seoultech.ac.kr (Seong Keol Kim).

Abstract

Recently, the interest in leisure and sports culture is increasing and the related industry is invigorating. In particular, baseball is the most popular sport in Korea. We focused on the pitching machine such as the two-wheeled and three-wheeled pitching machines. In this study, we applied a hand-sign glove with a tension sensor to mimic the catcher's hand sign. An Android application in a smart phone was built to communicate with the primary body using the Bluetooth. Simulations were performed to predict the ball trajectory considering variations in the coefficients of friction between the wheel and ball, the wheel stiffness, and the rotational speeds of the wheel by the RecurDyn, which was the CAE commercial program. Before commercializing this machine, it was designed to be miniaturized and automatically feed the balls.

Keywords:

Pitching machine, Bluetooth, 3-wheel, Hand-Sign glove, RecurDyn, Automatic feeder

Acknowledgments

본 연구는 서울과학기술대학교 교내 일반과제 연구비 지원으로 수행되었습니다.

References

NEWSIS, 2017, Viewed 20 March 2017, <http://www.newsis.com/view/?id=NISX20171002_0000110907&cID=10502&pID=10500>.
Korean Olympic Committee, 2016., Viewed 1 October 2016, Different Sports Type Statistics, <http://club.sportal.or.kr/statistics/item/index.jsp>.
Richard G. Budynas, J. Keith Nisbett, 2013, Shigley's Mechanical Engineering Design 9th Edition, McGraw-Hill Education Korea, Republic of Korea.
Heu, K. Y. 2014., Arduino Sketch the Imagine, Jpub, Republic of Korea.
Arduino. cc, n.d., Viewed 3 March 2016, <https://www.arduino.cc/en/Main/ArduinoBoardMega2560>.
Ryu, K. J., Kim, D. R., Su, H. J., 2016 Arduino Uno Motor Control Programming, Ohm, Republic of Korea.
SEEDSTUDIO., 2012 Viewed 16 July 2017, <http://wiki.seeedstudio.com/wiki/Images/b/b0/HC-12_User_Manual.pdf>.
Huamao Technology Co,. Ltd., n.d., Viewed 12 May 2016, <http://www.jnhuamao.cn/bluetooth.asp>.
Yoo, W. K., 2016, Multibody Dynamics: Theory and RecurDyn Practice: Introduction, Republic of Korea.
Lee, J. S., 1997, Practical Application of Sports Field Using Magnus Effect" Silla University Journal.