自行车的出现和发展使自行车仪表开发和持续发展。光电计数的不断发展，尤其

The emergence and development of bicycles led to the development and continuous development of bicycle meters. The continuous development of photoelectric counting, especially in the application of bicycle meters, is very prominent, so bicycle meters continue to evolve toward the direction of intelligent functions. Bicycle meters also show the development trend. The overall development of bicycle electronics is also continuous. In addition, because there are many types of bicycles, there are certain differences in the installation of meters for different types of bicycles. Therefore, it is costly and meaningful to be able to design an efficient and convenient bicycle instrument system. The entire system functions include display control function, key input, time counting, alarm control, bicycle speed collection, select Hall sensor to obtain bicycle speed information, and obtain mileage through speed data and bicycle wheel radius. At the same time, the system can also carry out safety on the speed of the bicycle. Warning prompt. Through the system scheme design, system circuit design and system software design, the function of the system is finally verified through simulation, and the design of bicycle speed tester is realized.

The emergence and development of bicycles make bicycle instrument development and sustainable development. The continuous development of optoelectronic counting, especially in the application of bicycle instruments is very prominent, so bicycle meters continue to evolve towards intelligent functions. Bicycle meters also show that the overall development of bicycle electronics trends is also continuous. In addition, due to the variety of bicycles, so the instrument for different types of bicycles, there are some differences in installation. Therefore, it makes sense to be able to design an efficient and convenient bicycle instrumentation system. The whole system function includes display control function, key input, time timing, alarm control, bicycle speed acquisition, select Hall sensor to obtain the speed information of the bicycle, through speed data and bicycle wheel radius can get mileage, while the system can also carry out safety warning tips on the vehicle speed. Through the scheme design, system circuit design and system software design, the function of the system is finally verified by simulation, and the design of bicycle speed tester is realized.

The emergence and development of bicycles make the development and sustainable development of bicycle instruments. The continuous development of photoelectric counting, especially in the application of bicycle instrument is very prominent, so the bicycle instrument continues to evolve to the direction of intelligent function. Bicycle meter also shows the development trend, the overall development of bicycle electronics is also continuous. In addition, because there are many kinds of bicycles, there are some differences in the installation of instruments for different types of bicycles. Therefore, it is significant to design an efficient and convenient bicycle instrument system. The functions of the whole system include display control function, key input, time timing, alarm control, bicycle speed acquisition. Hall sensor is selected to obtain the speed information of the bicycle. The mileage can be obtained through the speed data and the radius of the bicycle wheel. At the same time, the system can also give early warning of the speed. Through the scheme design, circuit design and software design of the system, the function of the system is verified by simulation, and the design of bicycle speed tester is realized.<br>