弹丸结构图形数据的自动采集

以ＡｕｔｏＣＡＤ图形软件包为二次开发对象，分析了图形实体数据结构的特征，提出了弹丸结构图形的图层预处理方法，介绍了弹丸结构图形的实体数据自动采集的基本原理，用ＡｕｔｏＬＩＳＰ语言开发了数据采集程序，并将图形数据的采集结果经过筛选和析取处理，按一定的格式要求存入中间数据库。

THE DATA SELF COLLECTING OF A PROJECTILE STRUCTURAL DRAWING

In this paper with the object on basis of Auto CAD drawing package secondary development, the characteristics of the drawing entity data is analyzed, the way of the drawing layer pretreatment of a projectile structural drawing is put forward. The basic theory of the entity data self collection of a projectile structural drawing is introduced. A data collection program is developed in Auto LISP. After a series of processes, the processed result is reserved in a temp data base in a special format. The temp data base is a data port of the data transference between the Auto LISP programs and other advance language programs, and it is the foundation of instant change of records and the data source of the final data base which is the basis of the following data transference and online design calculations. By the test of an example on a 586 computer, it shows that the data collection is quick and exact, and it is not more than one minute to collect all the data of a projectile structural drawing.