طراحي يك دستگاه تله متري الكترونيكي با استفاده از لب تاپ و دوربين فيلم برداري براي اندازه گيري پارامترهاي سينماتيكي و ديناميكي روندهاي دوسرعتي

Design of an Electronic Telemetry System in Conjunction with a Lab-top and Video Filming for Kinomatic, Dynamic Study of Sprinters

This study examined the velocity, acceleration, ground reaction, stopping and take - off forces, energy and power consumption during running in a hundred-meter event. An electronic telemetry system was designed and constructed for kinematic investigations, while videography being used to analyze kinetic characteristics for each stride. During the constant speed, the ground reaction force, stopping and take - off forces, mean energy and power consumption in each stride were also estimated. The performance criterion was time tp each IOm. We have used Microsoft Excel to trace the variation of velocity and acceleration of each subject. Three male sprinters (tops of a national team) volunteered as subjects for the study. The sprinters records were 10.8 second in the I00-meter run. The study demonstrates how the velocity increases widely at the beginning, remains constant for sometime and then decreases, when the runner reaches the end of the run. On the contrary, the acceleration is maximum just at the take-off, decreases to zero when the sprinter reaches his maximum velocity, decelerates to zero when the sprinter reaches his maximum velocity, and then decelerates arriving to the end of run. The results on force measurements showed that the sprinter with larger strides presents larger ground reaction, stopping and take-off forces which agree well with what the other researchers have obtained.