Swimming timing system with same clock source

Abstract

A swimming timing system with the same clock source comprises a communication controller, lane controllers and a communication bus, and is characterized in that the communication controller comprisesa constant temperature crystal oscillator and a first CAN transceiver, wherein the lane controller comprises a timing chip clock source and a second CAN transceiver, the first CAN transceiver is electrically connected with the constant temperature crystal oscillator, the second CAN transceiver is electrically connected with the timing chip clock source, and the first CAN transceiver is connected with the second CAN transceiver through the communication bus; the lane controllers share the crystal vibration, the timing relative errors between the lane controllers are eliminated, the accuracy oftiming is improved, the cost is reduced, the structure is simple and the practicability is strong.

Description

technical field [0001] The invention relates to the field of swimming timing, in particular to a swimming timing system with the same clock source. Background technique [0002] The existing swimming timing system adopts a separate timing crystal oscillator for timing on each swimming lane, and the independent crystal oscillator is used for timing by a separate clock source crystal oscillator frequency. The use of independent crystal oscillators for each swimming lane will cause frequency errors due to temperature or other factors. The existing swimming lane controllers cannot ensure that the crystal oscillator frequencies in each swimming lane are absolutely consistent, which may cause differences in the swimming lanes due to poor crystal oscillator consistency during the competition. There is a timing error between them, resulting in the problem of inaccurate timing. [0003] The swimming timing system needs to record the competition time of athletes on 10 lanes separatel...

AI Technical Summary

Problems solved by technology

The use of independent crystal oscillators for each lane will cause frequency errors due to temperature or other factors. The existing lane controllers cannot ensure that the frequency of crystal oscillators in each lane is absolutely consistent, which may lead to poor consistency of crystal oscillators during the game. There is a timing error between them, resulting in the problem of inaccurate timing

[0003] The swimming timing system needs to record the competition time of athletes on 10 lanes separately. The product before each lane is timed separately uses a separate crystal oscillator for timing. There is a timing error between the lanes in the timing of the individual crystal oscillator. For example, two lanes start at the same time and end at the same time. For a period of competition, due to the independence of the crystal oscillator, if a certain crystal oscillator is affected by the environment and the frequency of the crystal oscillator changes, it will cause timing errors

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