Task level synchronization method based on network communication

Abstract

The invention discloses a task level synchronization method based on network communication. The method is applied to a mutual communication process of master controllers. The method comprises the steps that S1, link transmission delay and offset time between a master clock and a slave clock are measured; S2, a host sends a data frame for starting a slave task within a sending window period of a next task period, after a slave receives the data frame, the slave calculates starting time of a next task of the host according to the time contained in the starting frame, sets starting time of the task of the slave and waits for starting; and S2, the data frame interacted between the host and the slave periodically comprises current host task starting time information, and the slave periodicallycorrects an offset coefficient, thereby finishing periodic synchronization adjustment. Through utilization of the task level synchronization method based on the network communication, the technical effect of reducing the system response time without additionally increasing a hardware circuit is achieved.

Description

technical field [0001] The invention relates to the field of safety-level equipment in nuclear power plants, in particular to a task-level synchronization method based on network communication. Background technique [0002] In order to ensure the correctness, reliability and availability of safety-level equipment, the safety-level equipment of nuclear power plants based on microprocessors uses redundancy technology, but the use of redundancy technology will result in longer response times for multiple CPUs. To improve the response time, the processing tasks in the redundant system need to run as consistently as possible. There are many synchronization methods, such as sharing the physical clock and using physical synchronization circuits. The use of physical synchronization requires additional hardware circuits, resulting in higher costs. In addition, when hard wiring is required, detailed timing logic analysis of different signal lines is required, which is time-consuming a...

AI Technical Summary

Problems solved by technology

[0005] The present invention provides a task-level synchronization method based on network communication, which solves the need to add additional hardware circuits in existing microprocessor-based nuclear power plant safety-level equipment for synchronous response of multiple CPUs, resulting in high cost and high cost. A certain risk technical problem, realized that the use of task-level synchronization method based on network communication can reduce the response time of the system without adding additional hardware circuits, and perform detailed timing logic analysis on different signal lines when hard wiring is not required, using the original communication The network is enough, the cost is low, and the technical effect of high efficiency

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