WO2018184166A1

WO2018184166A1 - Distributed real-time data server

Info

Publication number: WO2018184166A1
Application number: PCT/CN2017/079544
Authority: WO
Inventors: 邹霞
Original assignee: 邹霞
Priority date: 2017-04-06
Filing date: 2017-04-06
Publication date: 2018-10-11

Abstract

Provided in the present invention is a distributed real-time data server. The server comprises a gateway, RTU, production database, OPC communication interface, data interface, firewall system, control system, and computation system. The data interface comprises serial bus interfaces, such as A/D analog magnitude acquisition, D/A analog control signal output, I/O on-off magnitude monitoring and control, RS-485, and RS-422. The server further comprises an industrial real-time database and data acquisition unit therein. The server is connected to the cloud via an Ethernet network, and pushes real-time data in the database to the cloud. A built-in web server enables users to directly access the distributed real-time data server via a browser to check real-time data and configuration information of the server. The present invention significantly improves real-time operation of data, enable efficient usage of the gateway and RTU, lowers the loads of networks and a central server, reduces security risks of network communication, ensures network security, and further compacts a system structure to create a flat structure.

Description

Distributed real-time data server

Technical field

The invention relates to a distributed real-time data server, belonging to the field of cloud computing.

Background technique

Since the beginning of the 21st century, a new generation of information technology represented by the Internet of Things, cloud computing, and smart earth has flourished, which has promoted the advent of a new round of technological revolution and industrial revolution characterized by green, intelligent and sustainable development. Cloud service refers to a large-scale server cluster (cloud) that uses cloud computing technology to provide users with Internet services that do not need to be downloaded, do not need to be installed, are ready to use, are easy to operate, and are rich in functions and low in price. From device-centric to information-centric. The implementation of cloud services often depends on many technologies, such as virtualization, automation, and Web 2.0. In the era of cloud computing, there are professionals in the cloud to maintain data, platforms, and software. Users only need to type the URL of the application in the browser. After logging in, they can do what they can do on the personal computer in the browser. Everything.

With the development of technology, the ability of computers is constantly improving, but for some huge computing tasks, the current stand-alone computing power is still a drop in the bucket. On the other hand, according to statistics, more than 70% of PCs in the world are idle, which is a great waste of resources. Distributed computing technology can collect these idle computing resources for use. Due to technical feasibility and practical application needs, distributed computing is gradually becoming the mainstream by replacing centralized computing.

A distributed system is a system that distributes hardware or software components on a networked computer, communicating and communicating between components by communicating messages. A distributed system is a collection of separate computers that are like a single, consistent system to the user. This definition of a distributed system has two meanings: hardware, each machine itself is independent; software, for users, they use this computer set as if they are dealing with a single system.

technical problem

At present, many industries in China have problems such as low intelligence, poor long-distance communication capability, complicated operation, high cost and high maintenance cost, and need a combination of low cost, easy deployment, easy maintenance, and integrated management and control. According to the acquisition and monitoring management program, as an important part of distributed cloud computing, the server plays a very important role.

Problem solution

Technical solution

In view of the above-mentioned deficiencies of the prior art, an object of the present invention is to provide a distributed real-time data server, including a gateway, an RTU, a production database, an OPC communication interface, a data interface, and a firewall system, a control system, and a computing system. The data interface includes A/D analog acquisition, D/A analog control signal output, I/O switch monitoring and control, and serial bus interfaces such as RS-485 and RS-422. The server also includes industrial real-time database and data acquisition. Unit, the server connects to the cloud through Ethernet, and pushes real-time data in the database to the cloud. The built-in Web Server enables users to directly access the distributed real-time data server through the browser to view real-time data and server configuration information.

Preferably, the above industrial real-time database is used to store real-time and historical data.

Preferably, the data collection unit stores the collected field data in an industrial real-time database in real time, so that the data in the database is always updated.

Preferably, the above server is configured with up to 24 RS-485 interfaces and other types of I/O interfaces, and supports different data protocols.

Preferably, the server adopts an I/O interface to collect analog signals such as 0-10 mA, 4-20 mA, 1-5 V, or acquire a switch signal or a frequency signal, and output an analog control signal or a switch control signal of 0 to 5V.

Preferably, the server further comprises a numerical calculation and control strategy module, embedding a mathematical model and a control strategy required by the industrial site, providing production data services for various control requirements, and formulating a control strategy for the implementation of the production plan.

Advantageous effects of the invention

Beneficial effect

The server front-end application mode of the distributed real-time data server provided by the invention greatly improves the real-time performance of the data, reduces the usage of the gateway and the RTU, reduces the load of the network and the central server, reduces the risk of network communication, and guarantees Network security further compresses the system structure to make it flatter.

Brief description of the drawing

DRAWINGS

1 is a schematic structural diagram of a distributed real-time data server provided by the present invention;

2 is a schematic diagram of a communication method of a distributed real-time data server provided by the present invention.

Invention embodiment

Embodiments of the invention

The present invention provides a distributed real-time data server. The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It is understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

As shown in FIG. 1 , the distributed real-time data server provided by the embodiment integrates software and hardware such as a gateway, an RTU, a production database, an OPC communication interface, a data interface, a firewall, a control algorithm, and a calculation model, and is deployed in a workshop. The industrial site collects real-time data from field instruments directly and indirectly. The distributed real-time data server structure is shown in Figure 1.

Distributed real-time data servers provide a variety of interfaces that conform to production site standard specifications for collecting real-time data from field instruments, monitoring the operational status of field devices, and sending control commands to field devices and actuators. Its interface includes A/D analog acquisition, D/A analog control signal output, I/O switch monitoring and control, and serial bus interfaces such as RS-485 and RS-422.

An industrial real-time database is built inside the server to store real-time and historical data. The data acquisition unit stores the collected field data in the industrial real-time database in real time, so that the data in the database is kept updated. The server connects up to the cloud via Ethernet and pushes real-time data from the database to the cloud. At the same time, the built-in Web Server enables users to directly access the distributed real-time data server through the browser to view real-time data and server configuration information.

In the practical application of the production process, the distributed real-time data server can undertake a variety of tasks, mainly with the following functions:

(1) Fieldbus interface: Each distributed real-time data server has up to 24 RS-485 interfaces and other types of I/O interfaces, and supports different data protocols, especially suitable for relatively concentrated data collection points. occasion.

(2) I / O interface: AI, DI, AO, DO, can capture 0-10mA, 4-20mA, 1-5V and other simulation The quantity signal can also be used to acquire a switching signal or a frequency signal, and output an analog control signal or a switch control signal of 0 to 5V.

(3) OPC driver: It adopts the industry standard OPC interface, and other systems can access the data of the distributed real-time data server through the OPC interface.

(4) Numerical calculation and control strategy module: embedding the mathematical model and control strategy required by the industrial site, providing production data services for various control requirements, and formulating control strategies for the implementation of production planning, so that the precision of production control is greatly improved. .

(5) Display interface based on B/S architecture: The display interface based on B/S architecture realizes the configuration interface browsing without installing the client software, which greatly simplifies the load of the client computer and reduces the cost of system maintenance and upgrade. The workload reduces the overall cost of the user. At the same time, it supports browser access of mobile terminals such as tablet computers, and realizes the function of real-time data moving billboards.

(6) Data service and data management: store real-time data collected by the industrial site, and regularly archive, compress and upload to the data center server, which reduces the network communication pressure and communication risk, thus ensuring the real-time and accuracy of the collected data.

(7) Firewall: The server has a firewall with a customizable security policy. The server has easy accessibility and ensures data security and reliability.

(8) Reliable batch data transmission mode: For archived historical data, the server uploads the data to the historical archive server in the form of batch data, which ensures the reliability of data transmission and reduces the network occupancy rate.

The distributed real-time data server provides 24 RS-485 communication interfaces to meet the local needs of the production site. The embedded remote terminal server can be connected to the RS485 bus as a device. The wiring is shown in Figure 2. In this connection case, the serial port baud rate matching needs to be ensured, and the device ID numbers do not conflict.

Through the comparison, the distributed real-time data server provided in this embodiment has flexible and diverse methods, comprehensive functions, rich interfaces, simple and convenient use and configuration, intuitive and vivid user interface, and high system security. Its functional characteristics boil down to the following four aspects:

(1) Distributed structure, flexible deployment

Distributed real-time data server adopts distributed system architecture, B/S operation mode, distributed and flexible deployment It can be operated independently by a single machine or multi-machine networked to realize distributed data collection, distributed data service, distributed process control, support for mobile kanban, mobile HMI operation, and support for unattended operation.

The distributed real-time historical data server is suitable for applications where data collection points are relatively concentrated, such as power supply stations, power distribution stations, gas supply stations, workshops, workshops, docks, etc., and can collect batch data at one time; For occasions, support wired, WLAN, digital radio, WIFI, GPRS or 3G communication.

(2) Simple development and maintenance

Development and maintenance are very simple. The development of distributed real-time data server can be realized through three steps: data configuration, page design and data association. The operation and maintenance only need to be oriented to the operating system and browser, and the website development and maintenance mode. Consistent, no very professional automation engineers are required. Adopt "what you see is what you get" visual web design mode, support rich web page mode such as Flash, 3D.

(3) Rich data acquisition interface

Support mainstream DCS, PLC, DDC, fieldbus, smart meter and other equipment communication protocols, and can customize communication protocols, such as DL/T645 local power regulations. Each server can provide 4 to 24 RS-485 interfaces or A/D, D/A, I/O interfaces for real-time data acquisition and data service functions.

(4) Real-time and efficient data management technology

Realize the collection, storage and application services of various production data through high-efficiency real-time data management, historical data management, operational state management, event management, data file management, and data configuration management.

It is to be understood that those skilled in the art can make equivalent substitutions or changes to the inventions and the inventions of the present invention, and all such changes or substitutions fall within the scope of the appended claims.

Claims

A distributed real-time data server, characterized in that: the server comprises a gateway, an RTU, a production database, an OPC communication interface, a data interface, a firewall system, a control system, a computing system, and the data interface comprises an A/D analog acquisition. , D / A analog control signal output, I / O switch monitoring and control and RS-485, RS-422 and other serial bus interfaces, the server also includes an industrial real-time database and data acquisition unit, the server is connected via Ethernet To the cloud, and push real-time data in the database to the cloud, the built-in Web Server allows users to directly access the distributed real-time data server through the browser to view real-time data and server configuration information.
The distributed real-time data server of claim 1 wherein said industrial real-time database is used to store real-time and historical data.
The distributed real-time data server according to claim 1 or 2, wherein the data collection unit stores the collected field data in an industrial real-time database in real time, so that the data in the database is kept updated.
The distributed real-time data server of claim 1 wherein said server is configured with up to 24 RS-485 interfaces and other types of I/O interfaces while supporting different data protocols.
The distributed real-time data server according to claim 4, wherein the server adopts an I/O interface to acquire analog signals such as 0-10 mA, 4-20 mA, 1-5 V, or a collection switch signal or a frequency signal. Output 0~5V analog control signal or switch control signal.
The distributed real-time data server according to any one of claims 1 to 5, characterized in that the server further comprises a numerical calculation and control strategy module, which embeds a mathematical model and a control strategy required by the industrial site for various control Demand provides production data services and develops control strategies for the implementation of production plans.