Construction of smart gas system based on GIS technology

The urban gas pipeline network is an intricate network, according to which gas companies deliver gas from gas sources to customers. The aura field is related to the daily life of each household and the routine operation in various fields, and its necessity is self-evident. Geographic Information System (GIS) is an important spatial data system, which can collect, store, manage, calculate, analyze, display and describe data information about geographical distribution. According to the spatial layout characteristics of urban gas pipeline network, the management and application of gas pipeline network data information can be reasonably completed by using GIS technology.

1、 Development goal of GIS informatization

GIS informatization of gas pipeline network is based on the query of gas pipeline network database. By establishing a data information upgrading system, integrating production scheduling, hotline, online customer service, safety inspection and other information content, it provides reliable basis and service items for the overall planning, design scheme, engineering construction, operation evaluation of the gas pipeline network, and improves the business process management level and operation efficiency of the gas pipeline network.

The overall objectives of gas pipeline GIS information development and design include:

(1) Standardized management and unified application of gas pipeline and related business process data information;

(2) Create gas network data information upgrade system;

(3) Complete the informatization management method of gas pipeline operation and maintenance management;

(4) Connect relevant application systems according to the basic construction of GIS integrated management system.

2、 Design Thinking of GIS Information Development for Gas Pipeline Network

GIS informatization of gas pipeline network is to sort out and create association of spatial data and attribute data of pipeline network, generate comprehensive database query of gas pipeline network, and complete standardized management and unified application of data information, basic spatial data and attribute data of pipeline network business process, According to the dynamic update system of gas network data information, the status of pipeline database query is guaranteed. According to the characteristics and requirements of different business processes, three operating system architectures can be selected: mobile client/web server (C/S), computer browser/web server (B/S) and mobile terminal/web server (M/S).

III. Database construction and upgrading of gas pipeline network data processing methods

The key problem of GIS informatization of gas companies is data information, including pipe network data, urban basic spatial data and business process attribute data. The vitality of gas GIS system depends on the continuous updating of data information. Therefore, the data processing, database construction and upgrading of gas pipeline network can be said to be the success or failure of GIS system infrastructure construction

　　1。 Database analysis of gas pipeline network

For various reasons, many companies are currently managed according to design drawings, as built drawings or floor plans. Ten years ago, most of the materials were paper-based, and in the past ten years, most of the materials were in PDF format of AUTOCAD files. Some missing data information can be obtained through geophysical exploration, while the current CAD data information can be obtained through conversion.

Urban basic spatial data is a key component of gas GIS system. Only by taking urban basic spatial data as the background map of gas pipeline network, can lean management be carried out. The business process attribute data of gas pipeline includes facility information content, gas customer information, historical time safety accident handling, scada historical time data monitoring and line patrol record report and other data information.

　　2。 Preliminary preparation of pipe network data information

The preliminary preparation process of pipe network data information includes the analysis and sorting of existing data, on-site collection of missing data information, data sorting and inspection, and data information warehousing. The analysis and sorting of existing data is mainly to analyze the spatial data and attribute data with current use value in the pipe network. And valuable data information can be sorted, converted and stored in the database. Missing or inaccurate detailed pipe network data information can be obtained and determined by on-site supplementary collection or verification. For the accurate measurement of gas pipe network and underground equipment, it is mainly to accurately measure the plane position, elevation and relevant characteristics of gas pipe network and underground facilities. The method of combining high-precision GPS equipment with underground pipeline detector can be used for accurate measurement.

　　3。 Data standard of gas pipeline network

After the establishment of the gas network data information database, it is necessary to formulate a hierarchical management method for all gas geographic information and create a hierarchical structure and module zoning specification for indoor spatial elements of gas network according to the spatial geometric characteristics of specific contour points, lines and surfaces, the characteristics of contour lines and their correlations. In addition, in order to standardize the characteristic structure of each pipe network coating, it is necessary to formulate the characteristic structure specification of gas pipe network. In addition to the above basic specifications, it is also necessary to formulate technical specifications for accurate measurement of gas pipeline and completion accurate measurement, technical specifications for drawing gas pipeline drawings, gas pipeline data standards, and technical specifications for construction supervision of gas pipeline inspection projects.

4. Gas pipe network data information database

Gas pipeline network comprehensive database query is the basic service item of GIS information content system. According to the collection, sorting, production and processing of various natural geographical spatial data resources of gas, create a unified integrated database query of gas network, and complete the standardized management and unified application of gas network data information, basic spatial data and gas network business process attribute data. In the development process of pipeline network data processing method database, according to the gas pipeline network data standard, the map splicing, number classification, hierarchy and feature assignment, quality inspection, database entry and other processes of pipeline network data information should be developed to complete the seamless splicing and hierarchical management method of gas pipeline network data information.

　　5。 Upgrading of gas pipeline network

If the data information of the gas pipeline network GIS system is not upgraded and maintained, all the data information will become outdated with the change of time, and the system will lose its due role and efficacy. Therefore, it is necessary to create a gas pipeline network upgrade system:

On the technical level, the gas pipeline network GIS visualization tool should have a dynamic pipeline network update control module. Complete the addition of finished product precision survey data, the addition, modification and deletion of pipe network data information, and the engineering supervision of data information. In the process of updating, it is necessary to create synchronous updates of drawing data information and attribute data, topological structure association between geometric data information, etc.

At the business process level, strict rules and regulations need to be established for the dynamic update of the pipeline network, and relevant enterprises are required to immediately produce detailed completion data and normal operation data as the key countermeasures for upgrading and maintaining the gas pipeline data information. The upgrading of data information is managed by one unit or department, and the responsibility is assigned to the work department and post. The accuracy and security of data information are ensured according to professional maintenance.