Recognition and Recombination of the Form Information in Engineering Drawings Using Correlation Constraints

Product technical information contained in form format is the basis for the integrated management of product data.The paper proposes the approach of creating geometric correlation model and logic correlation model through the internal and external constraints in the information form.The information contained in form is recognized and recombined through a series of algorithms.The correlation between information forms is established when logging data to database according to the mapping relation between form and database.