Network interception device, system and method

Abstract

The invention discloses a network interception device, system and method, and achieves the real-time data monitoring of an industrial Ethernet on the basis of nonintervention of an original network topology. The first and second network ports of the device are directly connected through PCB wiring, thereby enabling the network data to directly enter a network through the other network port duringuploading, avoiding the delay caused by the forwarding processing, and meeting the requirements of small-period real-time communication. The device employs an FPGA as a core device, adds a serial number and a timestamp to a network data frame, and then transmits the network data frame to a monitoring computer. The device performs the analysis of the data frame in the soft core of the CPU, obtainsthe required state information, and uploads the state information to a server through an NB-IOT module. The device is convenient and reliable in hardware connection, and is low in cost. Moreover, a user can compile a data frame analysis method by himself according to the type of a to-be-detected network, and obtains the state information concerned. The device has the higher application value and good prospect in the field of the industrial Ethernet.

Description

technical field [0001] The invention relates to a network listening device, system and method. Background technique [0002] Real-time industrial Ethernet technology is the extension and development of Ethernet technology in the field of automatic control, and is an important development direction in the field of industrial control automation. Whether it is in the development and debugging stage of real-time Ethernet networking, or in the normal operation stage of the entire network equipment, the interception of network data frames is an effective means to study the communication performance and status of the network. [0003] However, with the development of CNC machining in the direction of high speed and high precision, the communication cycle of real-time Ethernet is getting shorter and shorter. The traditional method of transmitting data frames to the microprocessor and then forwarding them will inevitably cause delays in network transmission. A communication network ...

AI Technical Summary

Problems solved by technology

[0003] However, with the development of CNC machining in the direction of high-speed and high-precision, the communication cycle of real-time Ethernet is getting shorter and shorter. The traditional method of transmitting data frames to the microprocessor and then forwarding them will inevitably cause delays in network transmission. For A communication network with an extremely short communication period will cause a decrease in communication quality or even failure of normal communication

Various real-time Ethernet manufacturers have also introduced related network interception devices, but they are all for a certain type of real-time Ethernet interception. For example, the i

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