The Research On Some Technologies Of Plate-Like Schoolworks' Correction Software

The aim of the paper is to research the system of mechanical drawing schoolwork correction According to the structure of the corrected parts, the schoolwork correction system can be divided into series of shaft-like, plate-like, fork-like and box-like subsystems a In the past several years, many difficulties of shaft-like correction subsystem had been solved So, this task is to find the common principle and process of the plate-like drawing correction system which is based on existent results, and this can help to the subsequent research on the plate-like drawing correction systemAccording to the property of the errors, all drawing errors can been divided into absolute errors and comparative errors. So the plate-like drawing correcting process can be divided into two stages: Absolute errors checking and Comparative errors checking Absolute errors checking include four modules which were Line-Weight Checking, Hatch Checking .Dimension Checking and Overlapped Line Checking Comparative errors checking module include Drawing Compartmentalization, View Recognizing , Data Getting and Data Compare In this correction system, line-scanning and circle-scanning algorithm, direct graphics element compare algorithm and character compare are used, which simplify the process and reduce difficulties.According to the system's operational order, this paper explains how to solve some problems in the correction system, for instance, successively displaying AutoCAD files, finding datum mark, Drawing Compartmentalization, View Recognizing, scale consistency, orientation consistency, processing simplified means and displaying correcting resultsThis thesis is supported by Northwestern Polytechnical University' electronics teaching material budget.