Can the track timing system be accurate to such a short time?

Track events determine the ranking of athletes through time. From the initial use of the stopwatch to the later use of the camera, the result can be accurate to one hundredth of a second. Nowadays, the computer timing system used in international competitions can make the results accurate to one thousandth of a second.

With the slogan of higher, faster and stronger, the achievements of contemporary track and field sports have developed to the point where they cannot be interpreted with the naked eye. Excellent sprinters have a high speed in the 100 meter race. When they cross the finish line, they can't judge and reflect their rankings and achievements with the help of human eyes and nervous system. Carl lewis and M, famous sprinters, once reached the maximum speed 12 m 05/ s in the100m race. In high-level competitions, the performance of top sprinters is only 0.0 1 sec. When they reach the finish line, we can't judge who is the first, just like Liu Xiang and Johnson's 13.06 seconds in golden league, Rome. At that time, it was almost at the same time. Finally, our camera system told us that Johnson was in the lead. Especially in such an important competition as the Olympic Games, whoever wins the gold medal and who comes first must have a basis, otherwise it will be difficult to explain to the athletes! With the development of achievements and the progress of science and technology, we have a fully automatic track and field finish photography timing system.

This system makes a reasonable judgment on our achievements and rankings. When the referee shouted "Take your positions", the starting system started to work, and when the "ready" athletes started to do the starting action, the preemptive system started to work, telling the referee that several athletes started early in milliseconds. Generally speaking, when the starting device receives more than 25 kilograms, it is judged as a preemptive strike. When the starting gun rings, the timing system starts to work and time. When the athlete runs about 10 meters away from the finish line, the finish camera starts to turn on, ready to shoot. When athletes cross the finish line like a swarm of bees, the camera takes pictures of them crossing the finish line, and then uses the finish line score interpretation system to determine the athletes' rankings and final scores to three decimal places, but the final announcement only tells everyone the last two digits, such as 65438+. Athletes who hit the line almost at the same time use three decimal places to decide the final ranking.

According to IAAF regulations, athletes' official achievements and record-breaking only recognize electric timing results. When the athlete breaks the record, the final photo should be kept for final verification. Electronic timing system has been used in international competitions now. China's IAAF stipulates that the electric timing system must be used in more than three competitions in the country. Sprinters must be identified by electronic timing.

At present, Omega in Switzerland and Seiko in Japan are both electric timing systems approved by IAAF. Swatch in Switzerland, one of the sponsors of the International Olympic Committee, is used for the Olympic Games. The system can record the segment time and maximum speed of the athletes during the competition, and display the final result 15 seconds after the competition. In addition, China uses an electric timing system produced by Kunming Institute of Sports Electronics.

Science and technology are the primary productive forces, and advanced science and technology serve mankind everywhere. Therefore, the theme of our Beijing Olympic Games is "Hi-tech Olympics".

References:

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