Track and Field time measurement system

Uroš Stegel (2016) Track and Field time measurement system. EngD thesis.

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Abstract

Time measurement in sports, which are based on speed and fast movement, require high accuracy. In the most commonly used manual timing this requirement cannot be met. Errors due to human factor are too high and vary between persons who carry out measurements. These errors can be avoided by using electronic sensors, which sample events with high accuracy. In this thesis, we designed a distributed system for electronical time measurement. It consists of the control unit and sensor units that mutually communicate over radio frequencies. Units have their own clocks, which must be synchronized before measurements. Events triggered by moving objects are captured by infrared beam gates, while a special switch is responsible for sampling starting events. In the development we have given attention to the following elements that affect the accuracy of measurement : clock accuracy, time synchronisation and sensor event capturing. Finally, we experimentally confirmed that such a system suffices accuracy measures stating that accuracy is at least 10 times the measurement resolution being 0.01 s.

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