Author(s)

Haotian Chen ¹, Xuyan Feng ¹, Cheng Chen ², Bereket Fantahun Dagne ³, Shuping Xu ⁴

Affiliation(s)

¹ School of Control and Computer Engineering, North China Electric Power University, Beijing, 102206, China
² School of Energy, Power and Mechanical Engineering, North China Electric Power University, Beijing, 102206, China
³ School of Electrical and Electronic Information Engineering, North China Electric Power University, Beijing, 102206, China
⁴ North China Electric Power University, Beijing, 102206, China

Corresponding Author

Shuping Xu

ABSTRACT

As the "post-epidemic era" dawns, the spread of the epidemic becomes faster and faster, which has brought great impact on human society and made people's production and life impossible to fully restore. This is in part due to the growth of the epidemic resulting a profound impact on human society and the production, life of the people cannot be fully restored to their original state. "This requires that" online course experience "should not be neglected, but to real-time progress, explore and develop" online + offline "integration of more close, effective teaching mode. In order to improve the quality of online table tennis teaching, improve the deficiencies in traditional offline table tennis teaching, and pursue modern and scientific teaching objectives, this study proposes to design and develop the basic technical action evaluation system of table tennis based on Kinect motion capture technology. In view of the serious decline in the teaching quality of students' physical education at home in the post-epidemic era, the system can give guidance and evaluation to online students to meet the needs of table tennis learners to learn table tennis technical movements independently. First, extract table tennis teachers' basic technical action, in this study, the table tennis cross-pace is divided into: "Turning right", "Stepping on the left foot", "Straightening the body", three periodic action. According to the Euler distance, calculate the participation of the skeletal joint nodes in the whole period at all the stages of the movement; The three groups of bone joints with high participation of teachers in the same movements are extracted as the technical action comparison and evaluation database. Then, in the action comparison and evaluation analysis module, the Dynamic Time Warping algorithm is used to align the two time series of different lengths, and compare the similarity degree of the two sequences, and evaluate the completeness and accuracy of the overall technical action of the test object by the degree of similarity. The Pearson correlation coefficient is used to calculate the correlation degree of the initial action posture and the ending action posture of the three action stages respectively. According to the calculation results of the correlation degree, the problems existing in a specific technical action in the whole action cycle of the tester can be analyzed and analyzed in detail. By writing a computer program, realize the student test of table tennis technique action comparison evaluation results analysis function, intelligent feedback charts, text information of quantitative feedback evaluation results, so that students can timely understand the problems of their action, and correct themselves according to the evaluation results, achieve "outbreak era" auxiliary of online sports teaching function and purpose.

KEYWORDS

Table tennis; Kinect; Assist in online teaching; Action capture; Technical action extraction; Comparative analysis of the technical actions

CITE THIS PAPER

Haotian Chen, Xuyan Feng, Cheng Chen, Bereket Fantahun Dagne, Shuping Xu, Exploration of the Teaching Mode of "Online + Offline" in the Course of "Physical Education and Health". Curriculum and Teaching Methodology (2023) Vol. 6: 99-104. DOI: http://dx.doi.org/10.23977/curtm.2023.060914.

REFERENCES

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[3] Wang Yunheng. Research on the pace teaching and training measures in university table tennis teaching [J]. Sports & Sports products and Technology, 2019 (06): 249-250.
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