Ethernet network data acquisition and transmission method and system

Abstract

The invention relates to real-time data acquisition technology, in particular to a distributed, networking and expandable Ethernet data acquisition and transmission method and a distributed, networking and expandable Ethernet data acquisition and transmission system which acquire and transmit data in real time and are based on Ethernet and programmable controller PLC technology. The Ethernet data acquisition and transmission system takes a programmable controller as a control device for data acquisition and communication, is provided with an Ethernet controller, is in Ethernet communication with a host computer by adoption of an Ethernet / IP communication mode and a Modbus transport protocol, and also comprises an I / O module which is connected with the Ethernet controller and connected with a terminal module through a final level digital quantity output module; and the programmable controller receives digital quantity signals or analog quantity signals from a sensor through the I / O module, is communicated with the host computer through a system program, selects a working model, and transmits the digital quantity signals or the analog quantity signals to a controlled device. The Ethernet data acquisition and transmission system has strong communication ability, wide application scope and a plurality of acquisition points, and a data acquisition system capable of being suitable for complex operating condition requirements is an urgent requirement of industrial fields.

Description

technical field [0001] The present invention relates to real-time data acquisition technology, specifically a distributed, networked, scalable, real-time data acquisition and transmission method and system based on Ethernet and programmable controller PLC technology, suitable for Real-time acquisition of multi-point signals in complex industrial monitoring. technical background [0002] Due to the complexity and variety of field application environments, the requirements for data acquisition devices are also different. Looking at the data acquisition devices in the known technical field, there are generally limited signal processing speeds, low integration levels, and distributed data acquisition cannot be realized. Comprehensive processing with remote data cannot meet complex industrial and mining requirements, and data throughput is limited. [0003] Ethernet (Ethernet) is the most common communication protocol standard adopted by the existing local area network today, es...

AI Technical Summary

Problems solved by technology

[0004] 1) There are mandatory requirements on the type of signal or access instrument, which limits the scope and field of application, and cannot meet the requirements of complex working conditions

[0005] 2) The collection point is single, unable to meet the requirements of large-scale multi-point, data collection, the adaptability to complex working conditions is not strong, and the processing speed is not high, and the scalability is not strong

[0006] 3) The communication ability is not strong

The traditional 485 or 232 communication speed is limited, which limits the real-time performance of the data acquisition system to some extent

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