Two-stage isolation type Ethernet dual-redundancy communication system

Abstract

The invention provides a two-stage isolation type Ethernet dual-redundancy communication system. The two-stage isolation type Ethernet dual-redundancy communication system comprises a main controllerunit, a preceding stage isolation conversion unit, an Ethernet controller unit, a final-stage isolation conversion unit, a data network transmission cable and a user interface unit, all of which are connected successively. The two-stage isolation type Ethernet dual-redundancy communication system comprises two independent Ethernet peripheral circuits which can realize a redundancy switching function; that is to say, when one circuit is in fault or is damaged, the system is automatically switched to the other circuit to guarantee data reliability when the system communicates with an external device. The two-stage isolation type Ethernet dual-redundancy communication system is particularly suitable for the occasions with far communication distances, high communication precision requirementsand strong electromagnetic interference in an on-site work environment, such as a ship integrated power energy management system, a distributed transformer substation, a power electronic conversion device and an industrial on-site monitoring system.

Description

technical field [0001] The invention belongs to the field of embedded technology, and in particular relates to a double-stage isolated Ethernet double-redundant communication system. Background technique [0002] After nearly a hundred years, especially in recent decades of exploration and practice, navies around the world have reached a consensus: an important development direction of the future ship power system is the integrated power system (Integrated Power System: IPS). With the idea of ​​"modularization and integration", the ship's integrated power system simplifies the structure of the ship's power system, provides energy guarantee for shipboard high-energy weapons, and greatly improves the maneuverability, concealment and vitality of the ship. [0003] With the continuous improvement of the electrification level of the ship's power system, the ship puts forward higher technical requirements for the quality, reliability and vitality of the power supply, and it is urg...

AI Technical Summary

Problems solved by technology

This is due to the complexity of these multi-system functions, which will inevitably bring serious electromagnetic compatibility problems, which will pose a threat to the normal operation of communication equipment;

[0006] (2) During the voyage of electric propulsion ships, they are disturbed by various random uncertain factors such as wind, waves and currents, which will lead to an imbalance between the ship's output power and load power, and even undervoltage and overvoltage. Under severe conditions such as high pressure, it will cause serious damage to communication equipment;

[0007] (3) The working environment of ship data acquisition equipment is complex and changeable. Due to the influence of many factors such as transmission distance and on-site conditions, the transmission channel may be interrupted, such as network congestion, disconnection of network cables, loose network interface connectors, and network interface hardware circuits. Faults, etc., resulting in lower real-time performance and reliability of the network, and even the network cannot work normally

In contrast, in the embedded field, the general Ethernet design and implementation method is relatively complicated, in which the physical layer and data link layer are implemented by chip hardware, and other layers are implemented by software. The stack is very limited

[0029] However, in practice, it is found that if no necessary measures are taken, the reliability and accuracy of information transmission of the communication system based on Ethernet alone will not meet the technical requirements for information exchange of the ship's integrated power system

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