3results about How to "Improve Clock Synchronization Accuracy" patented technology

The application discloses a linear topology slave node synchronization method and system based on IEEE 1588 precision clock protocol, and the method comprises the following steps: step one, slave node 1 to slave node n-1 accepts PTP messages from a master node and forwards the PTP messages to the next level; step two, slave node 1 to slave node n-1 accepts PTP messages from slave node n and forwards the PTP messages to the previous level; step three, slave node 1 to slave node n takes an average value of round trip time to obtain an average link delay; step four, the master-slave clock offset is calculated according to the average transmission delay; and step five, dynamic frequency compensation calculation is performed. The application can increase the synchronization accuracy of the system and effectively reduce the clock deviation between nodes in the distributed system of the linear topology structure.

The application discloses an implementation method of clock synchronization of master-slave system based on EtherCAT. The basic idea of the method is to compensate the clock deviation between the master station and each slave station from three aspects of initial clock offset, transmission delay and clock drift. Compared with the traditional clock synchronization algorithm, the clock synchronization algorithm has the advantages that the transmission delay between the master station and the reference slave station is measured, and the initial clock offset of each slave station is compensated by using the transmission delay. The application has the beneficial effect that the clock synchronization precision between the master station and the slave station is improved while ensuring the nanosecond-level clock synchronization precision between the slave stations.