摘要
目的分析基于红外对射技术原理设计的50 m跑计时系统在硬软件架构和操作使用中的问题,通过1256名大学生进行测试后检验了系统在计时成绩方面的可靠性和稳定性。方法主要采用文献资料法、实验测试法和数理统计法对红外对射技术短距离跑步计时系统进行分析。结果(1)通过升级LED发光二极管红外发射探头,解决了强光对该系统红外线的干扰,系统稳定性提升,测试中无成绩丢失;(2)当终点红外对射装置高度在90 cm与专家手计成绩间无显著性差异(P>0.05);(3)对比该系统与专家手动计时方式间的变异系数值,该系统变异系数值比手动计时低,成绩效度比手动计时高;(4)系统解决了手动秒表所涉及的误差和测试效率问题,可同时进行8人分道测试。结论计时系统在精度和效度上达到了专家手动计时水平,可以用于50 m跑测试,它对提高学生体质健康测试效率,减少不同学校在50 m测试精度上的差距,同时对教育主管部门评价不同地区学生体质健康水平有非常好的意义,具有较高的应用推广价值。
Objective To analyze the problems in the hardware and software architecture and operation of the 50 meter running timing system designed based on the principle of infrared counter radiation technology.The reliability and stability of the system in terms of timing performance were tested by 256 college students.Methods The methods of literature review,experimental testing,and mathematical statistics were used to analyze the infrared counter technology short distance running timing system.Results(1)By upgrading the LED infrared emission probe,the interference of strong light on the infrared ray of the system was resolved,the system stability was improved,and no results were lost during the test;(2)There was no significant difference between the height of the infrared imaging device at the end point and the expert's hand count scores(P>0.05);(3)Comparing the coefficient of variation values between the system and the expert manual timing method,the system has a lower coefficient of variation value and a higher performance validity than manual timing;(4)The system solves the problems of error and testing efficiency involved in manual stopwatches,and can simultaneously perform a lane separation test for 8 people.Conclusion The timing system has reached the level of expert manual timing in terms of accuracy and validity,and can be used for the 50 meter run test.It can improve the efficiency of students'physical health testing,reduce the gap in the accuracy of the 50 meter test in different schools,and has very good significance for education authorities to evaluate the physical health level of students in different regions,with high application and promotion value.
作者
徐峰
施兰平
XU Feng;SHI Lanping(Department of Physical Education,Zhejiang Gongshang University,Hangzhou,Zhejiang Province,310018 China)
出处
《科技资讯》
2023年第5期17-22,77,共7页
Science & Technology Information
关键词
红外对射
50
m跑
电动计时
计时系统
Infrared through-beam
50-meter race
Electric timing
Timing system
