Thesis
Wireless bat swing sensor evaluation study with high speed video system
Washington State University
Master of Science (MS), Washington State University
2016
Handle:
https://hdl.handle.net/2376/101250
Abstract
Batter swing speed is an important parameter in understanding the performance of baseball and softball bats. The aim of this study is to validate 3 wireless swing sensors using high speed video and a wired sensor. Swing speed measured by each sensor was compared with that measured by high speed video system. 9 batters with various swing speed abilities were invited to join the test. For each batter, we measured 5 swings for each sensor using two different bats, comprising 270 swings. Swing speed of bat swing sensors was shown on a mobile app. Swing speed of high speed video system was measured by differentiating the position coordinates of the markers on the bat barrel. The result showed that the average difference between bat swing sensor and video tracking was 8%. With the raw sensor data (acceleration and angular velocity) provided by the sensor manufacture, we reconstructed the swing motion. The swing speed results from motion reconstruction were compared with that of the sensor manufacture and the high speed video system. A high accuracy Wired Sensor made of accelerometer and gyroscope was used to validate the performance of bat swing sensors. The test result showed that the swing speed calculated from Wired Sensor data is closer to the video tracking result. The difference was 1.3%.
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Details
- Title
- Wireless bat swing sensor evaluation study with high speed video system
- Creators
- Bin Lyu
- Contributors
- Lloyd V. Smith (Degree Supervisor)
- Awarding Institution
- Washington State University
- Academic Unit
- Mechanical and Materials Engineering, School of
- Theses and Dissertations
- Master of Science (MS), Washington State University
- Publisher
- Washington State University; [Pullman, Washington] :
- Identifiers
- 99900525294201842
- Language
- English
- Resource Type
- Thesis