Parameterized Drawing System Of The Plane Arrangement Maps Of Electrified Railway Contact Net

Based on AutoCAD platform, under Visual LISP environment, adoptingtarget-oriented programming method and applying parameterized design principle, theparameterized drawing system of the plane arrangement maps of electrified railway contactnet is developed. Given that the drawing of plane arrangement maps of electrified railway contact net isone of the important junctures of the whole contact net design, starting from the perspectiveof system, the paper firstly analyzes the drawing task of the plane arrangement maps ofrailway contact net in details and presents the structure and function of the system, secondlydiscusses the formulation of consumer menu and dialogue frame and lists the main controllingprogram of dialogue frame, then by analyzing the involved data of originally drawing coursegives and realizes the management of the original drawing data, which achieves the drawingof choosing inter-station and station, the establishment of drawing papers and drawing form,the setting-up of character height and the drawing form coordinate points and drawing startingpoints and the preserving routes of data documents of drawing form and the note-markingcolumn and the size of subsidiary table. By analyzing all sorts of data involved in the drawingof plane arrangement of the contact net, the paper then presents and realizes the sub-systemsof drawing data management, which includes setting up the data structure, programming andmanaging of the data and provides the drawing data for the whole system used for the laterdrawing, finally by introducing the concerned theories of the parameterized design explainsthe similarities and differences and their applied scope of all kinds of parameterizedtechnologies, and by associating with the features of the plane arrangement maps of therailway contact net analyzing size restraint of contact net. The system depends on the featuresof rapidness, simplicity, driving by parameter and fitting for designers' habits and blends thesize parameter into data structure and by using the driving technology realizes the drawing ofsingle and double track lines of inter-station and the plane arrangement maps of stationcontact net. The system has the features of friendly interface, simple operation, convenient drawingand automatic correction and can be applied for the drawing and correction of the planearrangement map of railway contact net.