Design Of Swimming Timing System Based On Wireless Data Transmission

Currently, with the flourish development of sports, the racing is becoming more popular than before,it has turned into the focus of daily life.The history of Olympic Games reflect the history of breaking through human beings themselves,moreover,the proof that prove breakthrough of people is the evolution of timer. The system of timer is an essential part of racing events.Every exciting results were showed by the form of time data,however China still lack of the timer system that has recognized by the international world.Most domestic venues still take advantages of traditional artificial way or the introduction of foreign advanced equipment for timing work.The traditional way for timing does not only reach the standard of high quality,but also waste of labor,in another way, the import of foreign brands cause the extra budget which is not easy to afford by most venues.The Olympic Games in Beijing in 2008 utilized the timer supplied by Omega.As the reasons which are described before,researching independently on the timer is become an important part of our strength of sports.Domestic enterprises and research institutions in this field is carrying out technical studies.For the current system of timer in China,it pointed a design which is based on wireless timing system,it can be utilized in swimming,racing and boat for timing.Whereas,there are many unpredictable factors timing process,so that it can not rely on the accuracy of the timing of the unique timing equipment.There are two or more than two spare stopwatch on every lane in swimming competition.One reason is for backuping results,another one is to gain an average score to make the results more dependable.As the complicated results caused by the excessive stopwatches,the design of stopwatch adopted wireless method to make the consequence more shapely and the record more timely.There is a preferably design in the set of crystal detection equipment in the unit circuit timing crystal device to ensure that each wireless stopwatch exogenous crystal accurate and stable, thus, ensuring stable timing.The wireless of timing system is semi-automatic operating mode,sending the results to the computer.The system include three parts,wireless stopwatch,communication controller and center of data processing.Wireless is for timing,communication is the bridge between systems,in another words,it is hub for data transporting.The center of data processing is based on communication controller to complete data transporting,sending instruction and receive information,completing to processing the data at the same time.STM32F103RBT6 is the core for the wireless stopwatch,designing OLED module,Flash module,SRWF-1E80 module wireless by 433 MHz.it set a PC software at the port center of data processing to connect a communication controller,there is a SRWF-508 wireless module in communication controller which can obtain data from 20 PC respectively.After experimental testing, the design of timing system can receive real-time data which has broad application prospects with timing accuracy, simple operation and reliable performance.