Swimming timing equipment microsecond-level timing method based on CAN bus

Abstract

The invention relates to the technical field of racing competition appliances, and concretely relates to a swimming timing equipment microsecond-level timing method based on a CAN bus. The method comprises the following steps: S1, electrifying equipment to initialize a clock reference; S2, carrying out timing operation; and S3, performing automatic operation and result display. According to the swimming timing equipment microsecond-level timing method based on the CAN bus, in the same CAN network, microsecond-level timing can be conducted on a plurality of timing equipment through one high-precision clock source, no number limitation exists, the method can provide a more accurate and stable timing reference for a swimming timing system, multi-equipment clock synchronization can be conducted at the microsecond level, the number of synchronized devices in the same network is not limited, the clock reference of each device can be dynamically compensated, extra hardware investment does notneed to be added, the system complexity is remarkably reduced, the portability and stability of the timing system are improved, and the timing result is more accurate and reliable.

Description

technical field [0001] The invention relates to the technical field of racing equipment, in particular to a microsecond-level time calibration method for swimming timing equipment based on a CAN bus. Background technique [0002] The current timing method of the computer operating system is to calculate the total number of seconds from 1970 / 01 / 01, but the computer hardware is mainly based on the internal time of the BIOS, due to the frequency problem of each chip itself and the error caused by the drift of the crystal oscillator. There is a difference between the above two times, and the time deviation will become larger and larger due to the long-term operation of the equipment. The swimming timing system needs to accurately record the moment when the athlete touches the wall. In order to avoid timing differences, it is very important to correct the timing of the timing hardware. Swimming The timing system needs to deploy a timing terminal on each lane for separate timing t...

AI Technical Summary

Problems solved by technology

[0003] However, the timing terminal is affected by temperature or other factors, and long-term operation will cause the internal crystal oscillator to drift, and frequency errors will occur. If there is no unified time reference for the timing terminal to perform time calibration operations, multiple timing terminals are inevitable in long-term competitions. There will be running errors, resulting in inaccurate timing. Therefore, it is necessary to design a mechanism that can perform time calibration operations on timing terminals through the communication bus, and ensure the uniformity of time references of multiple timing terminals during long-term operation.

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