CN111857711A - SVG (scalable vector graphics) and RPC (remote procedure call) communication-based SCADA (supervisory control and data acquisition) system real-time display method - Google Patents
SVG (scalable vector graphics) and RPC (remote procedure call) communication-based SCADA (supervisory control and data acquisition) system real-time display method Download PDFInfo
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Abstract
The invention discloses a SVG (scalable vector graphics) and RPC (remote procedure call) communication-based SCADA (supervisory control and data acquisition) system real-time display method, which comprises the following steps of: 1) drawing SVG primitives by using an SVG tool, putting the SVG primitives into a primitive library, and compiling corresponding JavaScript for each type of SVG primitives for displaying interactive logic of the primitives; 2) and the RPC communication mode based on the TCP protocol requests to call background data service, and JSON format data is returned, so that dynamic rendering of page data is realized. The method of the invention can realize the real-time monitoring function of the SCADA system, improve the data transmission efficiency and ensure the safety and reliability of data transmission.
Description
Technical Field
The invention relates to a real-time display method of an SCADA system, and belongs to the technical field.
Background
The energy is the material basis of human society survival and development, and is the power and the life pulse of national economic development. With the rapid development of industrial production in China, the demand and consumption of people on energy are increased rapidly. However, petroleum, natural gas and other non-renewable energy resources are scarce and non-renewable, and the construction for vigorously developing wind power, photovoltaic and other renewable energy resources is very important. In recent years, the wind power generation industry enters a rapid development period, people pay more and more attention to deep fusion of information technology and renewable energy industry, and perfect wind power development related technology provides important backup support for the development of the wind power generation industry.
The wind power station in China at present has the characteristics of wide regional distribution, small single machine capacity, large quantity and various machine types. With the continuous increase of the scale of the wind power installation, how to adopt the advanced information technology, the scale advantage of the wind power plant in the region is maximized, and the defects of professional technical personnel shortage, repeated configuration of facility equipment, low production efficiency and the like caused by a decentralized operation and maintenance mode are avoided, so that the method becomes a major problem to be solved urgently in the wind power industry. At present, each large power generation group develops a regional wind power centralized control center, and the regional wind power centralized control center is helpful for improving the comprehensive management level and the economic benefit of enterprises, and becomes a consensus of adversion growth, structure adjustment and optimization development modes in the wind power industry.
The regional wind power centralized control center needs to monitor and display the running states of fans in each wind power station in real time so as to provide technical support and guidance for fan operation and maintenance personnel in time, the SCADA (supervisory control and data acquisition) system realizes a data acquisition and monitoring system, a set of complete and intelligent graphic tools are needed in the system to draw regional stations and fan group control pages, the running states of all fans are visually displayed, and meanwhile, the page data are dynamically updated in real time.
At present, each large power generation company develops regional wind power centralized control center construction. The SCADA system used in wind power centralized control can monitor the running state of the fan in real time, find potential hidden dangers and problems in time, implement improvement measures and ensure the normal running of the wind power generation system.
Currently, there are mainly vg (visual graph) -based solutions in the industry. The solution is as follows:
VG provides powerful ActiveX component to realize the special processing of interactive graphics, has no relation to specific service, provides rich and standard interactive event and graphic control command, has built-in script language with simple and open structure, works together with other popular programming languages, makes up the deficiency of these languages in graphic processing, can be embedded into IE browser to realize the edition and control of online graphics, etc., facilitates the drawing of various pages and graphic elements in SCADA system, and has clear system structure. The method is particularly suitable for developing various industrial monitoring software such as electric power, coal, chemical industry and the like, and is applied to graphic modeling, graphic management, GIS, CAD, flow charts, Chinese tables, engineering drawing and the like.
However, because there are many wind power plants, the number of fans in a wind power plant is large, the distribution range is wide, and in an SCADA system, there are many fans of the same type in each plant, and the images are substantially similar, so that it is necessary to implement a standard library of primitives to facilitate the reuse of each plant, reduce the workload of implementing personnel for drawing, and reduce the working cost. And the VG solution determines the defect that VG can only run at IE9 and above because VG is realized on the basis of ActiveX components, and for the SCADA system which needs to meet diversified service requirements at present, VG has the problem that other browsers are incompatible except IE. Data displayed on a page formed by VGs has the defects of low transmission efficiency and untimely real-time data updating, and codes of the VGs are difficult to debug due to asynchronous calling.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: in the process of displaying the SCADA system in real time, the convenience of drawing the graph is realized, the data transmission efficiency is improved, the development time is saved, and the development cost is reduced;
the invention further solves the problem that in the process of displaying the SCADA system in real time, the drawn graph has good browser compatibility and supports each browser version of each platform.
In order to solve the technical problem, the invention provides a SVG (scalable vector graphics) and RPC (remote procedure call) communication-based SCADA (supervisory control and data acquisition) system real-time display method, which comprises the following steps:
1) establishing an SVG (scalable vector graphics) primitive library: drawing SVG primitives by using an SVG tool, putting the SVG primitives into a primitive library, and compiling corresponding JavaScript for each type of SVG primitives for displaying interactive logic of the primitives;
2) dynamically rendering page data: and the RPC communication mode based on the TCP protocol requests to call background data service, and JSON format data is returned, so that dynamic rendering of page data is realized.
The principle of the SCADA system real-time display method is as follows: a general primitive component library is developed and formed based on Scalable Vector Graphics (SVG) technology, basic primitives are provided for external use and drawing in a component mode, a graphic page in an SCADA system is finally manufactured, drawn graphics have good browser compatibility, and browser versions of various platforms are supported. Meanwhile, RPC (Remote Procedure Call Protocol) communication and JSON (java script object notation) technology are combined, the volume of a request message body is reduced, the data transmission efficiency is improved, dynamic rendering of graph page data is realized, the safety and reliability of data transmission are ensured, and later code debugging and problem troubleshooting are facilitated.
The invention achieves the following beneficial effects:
the invention provides a real-time display method of an SCADA system based on SVG combined with RPC communication. The method is based on Scalable Vector Graphics (SVG) to perform secondary development and drawing to form an SVG primitive library with a JavaScript script, is convenient for a user to construct a graphics page based on diversified requirements, and simultaneously performs data communication and data interaction by combining RPC communication and JSON to dynamically render the graphics page in real time, thereby realizing the real-time monitoring function of an SCADA system, improving the data transmission efficiency and ensuring the safety and reliability of data transmission. The SVG primitive library provides rich and diversified graphic elements for various implementers to manufacture monitoring systems, form systems and the like, simplifies the drawing work of various primitives and pages in the SCADA system, improves the generation level of real-time monitoring pictures, and saves the deployment expense of the system. The RPC communication solves the problems of difficult code debugging and page information synchronization efficiency in the asynchronous calling process.
Drawings
FIG. 1 is a flow chart of a SCADA primitive storage and drawing method of the present invention;
FIG. 2 is a schematic of a rendered photovoltaic primitive;
FIG. 3 is a schematic diagram of saving primitives as SVG files;
fig. 4 is a diagram illustrating SVG image rendering by reference primitives.
Detailed description of the invention
The invention is described in further detail below with reference to the following drawings and detailed description.
Example 1
FIG. 1 is a flow chart of a SCADA primitive storage drawing method of the present invention. The invention discloses a SCADA system real-time display method based on SVG combined with RPC communication, which comprises the following steps:
step one, establishing an SVG (scalable vector graphics) primitive library
The method is characterized in that an SVG graphic primitive library is established based on an SVG tool, in order to enable programmers to write parts such as background systems and the like which are irrelevant to graphics with great concentration, the burden of the programmers is reduced, the development cost is reduced, and the development time is saved, the SVG is named as Scalable vector graphics, the format of the SVG is based on extensible markup language XML, and the SVG can be embedded into various mainstream client frameworks including Google, Huohu, IE and the like.
The process of establishing the SVG primitive library is as follows:
1) drawing SVG graphics primitives by using an SVG tool and putting the SVG graphics primitives into a graphics primitive library, wherein the SVG graphics primitives comprise a fan, a digital quantity, a lighting quantity, a pie chart, a curve, a column chart, a cross-track chart and the like;
2) compiling corresponding JavaScript scripts for each type of SVG graphics primitives, and using the JavaScript scripts for displaying interactive logics of the graphics primitives, wherein the JavaScript scripts are used for displaying interactive logics of the graphics primitives, and the interactive logics comprise rotating speed control of a fan, power display of the fan, on-off quantity closing, display of a histogram, display of a historical curve and the like; meanwhile, configurable attributes are provided for each SVG primitive, and the attributes are used for inputting information of a real-time library measuring point, description information of the measuring point, color configuration of a curve, thickness configuration of the curve and the like corresponding to each SVG primitive in a user-defined manner;
3) Drawing a good SVG graphic primitive, writing a corresponding JavaScript code, performing software test by taking the SVG graphic primitive code as a front-end code, and simulating a background request to determine whether the SVG graphic primitive can be displayed in a browser; after research and development tests, the primitive library with successful manufacturing effects is archived and deployed on a server, stored in a primitive assembly directory of a drawing tool and used as a drawing basic primitive for implementing personnel to use.
4) The method comprises the following steps that a site drawing person downloads a primitive library from a server, the primitive library is loaded through an SVG drawing tool to draw an SVG graph, and SVG primitives required by the graph are dragged through the SVG drawing tool to form the SVG graph; if a single SVG graphic primitive can directly represent a graphic to be expressed, the single SVG graphic primitive is the SVG graphic, and if a plurality of SVG graphic primitives are required to form the graphic to be expressed, the plurality of graphic primitives are combined into the SVG graphic through dragging;
5) and placing the SVG graph in an SVG folder in an SCADA project, naming the SVG graph as a corresponding organization name, and opening a corresponding organization page of the SCADA system to display the unit operation condition of the energy station where the SCADA system is located in real time.
(2) Dynamic rendering of page data
After SVG graphics are formed by drawing an SVG graphics primitive library, the development problem that data transmission efficiency and asynchronous calling are difficult to debug is solved by using an RPC communication mode.
The RPC communication protocol assumes the existence of some transmission protocols, such as TCP or UDP, to carry information data between communication programs. In the OSI network communication model, RPC spans the transport and application layers. RPC makes it easier to develop applications including network distributed multiprogrammers. RPC communication uses a client/server mode. The requesting program is a client and the server provides the service.
The method comprises the following specific steps:
firstly, a client calls a process to send a call request with parameters to a service process, then waits for response information, and at a server, the process keeps a sleep state until the call information arrives; when a piece of calling information arrives, the server obtains process parameters, obtains required result data according to the requested parameters, sends the result data to the client through an RPC communication protocol, then waits for the next piece of calling information, and finally, the client receives the result data in the calling process to obtain a process result, and then the calling execution continues;
SVG graphics with interactive logic, RPC communication mode based on TCP protocol requests to call background data service, the background provides a service interface based on RPC communication supporting page call, provides interface data for the front end, returns JSON format data, performs real-time data display and dynamic interaction of primitives, and realizes dynamic rendering of page data.
Fig. 2 to 4 are flow charts of drawing primitives. The method comprises the steps of firstly drawing photovoltaic primitives or other primitives, storing the primitives as SVG files, and drawing the SVG images by referring to the primitives.
With the more mature SVG graphics technology, the use of SVG to draw images in the power industry is a necessary trend. Based on the huge demand of the existing SCADA system for drawing configuration diagram data volume, the invention uses the prior mainstream novel SVG technology to develop and draw the SVG primitive library, and because the SVG primitives of the primitive library have JavaScript scripts, the invention can conveniently realize interactive logic. The SVG graphics primitive library is used for reducing the drawing workload, and the SVG graphics primitive library has the advantages of being telescopic, capable of being printed at any resolution ratio with high quality, capable of being amplified under the condition that the image quality is not reduced and the like, and further improves the compatibility and the attractiveness of the system. In the process of drawing the graph, the method has the characteristics of draggable property and strong expandability. The drawn graph has the characteristics of being scalable and frame loss free, and also has the characteristics of attractive appearance, delicacy and strong 3D effect. On-site drawing personnel do not need to pay attention to the logic writing of the graphic primitives, the graphic drawing work of software developers and power plant implementers is simplified, the attractiveness of the system is improved, the generation level of real-time monitoring pictures is improved, and the deployment expense of the system is saved. The RPC communication mode based on the TCP protocol requests the data rendering method of calling the background data service, the RPC communication request message is small in size and balanced in self-carrying load, the data transmission efficiency is improved, the performance consumption is reduced, and the code debugging and problem troubleshooting are facilitated.
Claims (6)
1. A SCADA system real-time display method based on SVG combined with RPC communication is characterized by comprising the following steps:
1) drawing SVG primitives by using an SVG tool, putting the SVG primitives into a primitive library, and compiling corresponding JavaScript for each type of SVG primitives for displaying interactive logic of the primitives;
2) and the RPC communication mode based on the TCP protocol requests to call background data service, and JSON format data is returned, so that dynamic rendering of page data is realized.
2. An SCADA system real-time display method based on SVG combined with RPC communication according to claim 1, characterized in that in step 1), the SVG primitives include blower, number, amount of lighting, pie chart, curve, bar chart, cross-track chart.
3. The method for displaying the SCADA system in real time based on the SVG combined with the RPC communication of claim 1, wherein in the step 1), the JavaScript script comprises the rotation speed control of the fan, the power display of the fan, the closing of the switching value, the display of a histogram and the display of a historical curve.
4. The method for displaying the SCADA system in real time based on the SVG combined with the RPC communication as claimed in claim 1, wherein in step 1), configurable attributes are provided for each SVG primitive simultaneously for custom inputting information of a real-time library test point corresponding to each SVG primitive, description information of the test point, color configuration of a curve, and thickness configuration of the curve.
5. The method for displaying the SCADA system based on the SVG combined with the RPC communication according to claim 1, wherein, in step 1),
drawing a good SVG graphic primitive, writing a corresponding JavaScript code, performing software test by taking the SVG graphic primitive code as a front-end code, and simulating a background request to determine whether the SVG graphic primitive can be displayed in a browser; after research and development tests are carried out, the primitive library with successful manufacturing effect is filed and deployed on a server and stored in a primitive assembly directory of a drawing tool;
downloading a graphics primitive library from a server, loading the graphics primitive library through an SVG drawing tool to draw an SVG graph, and dragging an SVG graphics primitive required by the graph through the SVG drawing tool to form the SVG graph; if a single SVG graphic primitive can directly represent a graphic to be expressed, the single SVG graphic primitive is the SVG graphic, and if a plurality of SVG graphic primitives are needed to form the graphic to be expressed, the plurality of graphic primitives are combined into the SVG graphic through dragging;
and placing the SVG graph in an SVG folder in an SCADA project, naming the SVG graph as a corresponding organization name, and opening a corresponding organization page of the SCADA system to display the unit operation condition of the energy station where the SCADA system is located in real time.
6. The method for displaying the SCADA system in real time based on the SVG combined with the RPC communication of claim 1, wherein in the step 2), the specific steps of dynamically rendering the page data are as follows:
firstly, a client calls a process to send a call request with parameters to a service process, then waits for response information, and at a server, the process keeps a sleep state until the call information arrives; when a piece of calling information arrives, the server obtains process parameters, obtains required result data according to the requested parameters, sends the result data to the client through an RPC communication protocol, then waits for the next piece of calling information, and finally, the client receives the result data in the calling process to obtain a process result, and then the calling execution continues;
SVG graphics with interactive logic, RPC communication mode based on TCP protocol requests to call background data service, the background provides a service interface based on RPC communication supporting page call, provides interface data for the front end, returns JSON format data, performs real-time data display and dynamic interaction of primitives, and realizes dynamic rendering of page data.
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