Synchronization method and device based on industrial Internet field layer broadband bus architecture

Abstract

The embodiment of the present application discloses a synchronization method and device based on the broadband bus architecture of the industrial Internet field layer. The bus architecture includes a bus controller, at least one bus terminal and a two-wire bus, and the bus controller and the bus terminal pass through the two-wire bus. Connected into a bus system, the bus system communicates based on OFDM technology. In this method, all bus terminals use the bus controller as the standard. When receiving signals and transmitting signals, the received signals and Adaptive clock correction is performed on the sending signal to achieve clock synchronization and symbol synchronization with the bus controller, and the sending time of the sending signal is adjusted according to the transmission delay, which realizes the synchronization of all devices on the bus system and provides for the transmission of hard real-time services basic guarantee. Moreover, the present invention realizes clock synchronization and symbol synchronization of all bus terminals and bus controllers on the bus system through the physical layer synchronization process.

Description

technical field [0001] The present application relates to the field of communication technology, and in particular to a synchronization method and device based on the field layer broadband bus architecture of the Industrial Internet. Background technique [0002] Under the existing communication technology, the underlying data communication in the field of automation is mainly realized by the field bus. The so-called field bus refers to the digital, serial, multi-point communication data bus between the field devices installed in the manufacturing or process area and the automatic devices in the control room. Among them, the field bus mainly includes: a controller area network (Controller Area Network, CAN) bus, a process field bus (Process Field Bus, PROFIBUS) bus. [0003] However, the transmission bandwidth of CAN bus and PROFIBUS bus is low, generally below 50M, resulting in slow transmission rate, unable to meet the access and high-speed transmission requirements of ma...

AI Technical Summary

Problems solved by technology

[0003] However, the transmission bandwidth of CAN bus and PROFIBUS bus is low, generally below 50M, resulting in slow transmission rate, unable to meet the access and high-speed transmission requirements of many industrial field devices in large industrial sites

[0004] Although industrial Ethernet buses such as Profinet have a higher transmission bandwidth than CAN and PROFIBUS, they need to use Ethernet switches to realize device access and data transmission in industrial field applications. The system is complex and wiring is difficult, which cannot meet high-speed data, real-time transmission

Moreover, with the expansion of the scale of the industrial field, the industrial field devices are also complicated and numerous. The field bus needs to be connected to a large number of industrial field devices, and Profinet cannot meet the access and high-speed transmission requirements of a large number of industrial field devices in large industrial sites.

Moreover, since an Ethernet switch is needed to realize device access and data transmission, the synchronization scheme of Profinet and other industrial Ethernet buses is relatively complicated and the effect is poor.

[0005] With the expansion of industrial field scale and the increase of industrial field devices, the existing technology lacks a field bus that can simultaneously satisfy high real-time, high bandwidth, high speed and does not require switches

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