Abstract:

By introducing the database technology in the development of the expert system, this paper proposes a database-based representation method of framework knowledge and an establishment method of knowledge base for the submerged are welding. Afterwards, an expert system meeting the requirements of submerged arc welding is successfully developed. The key technologies of the expert system, such as the knowledge acquirement, the knowledge base management, the consultation and reasoning principle and the system realization, are also discussed in detail. Operation results of the expert system indicate that, owing to the adopted database technology, the unification of knowledge and reasoning mechanism is realized, and the key problems, namely the maintenance and management of the knowledge base, are successfully solved. Thus, the proposed system is easy to perfect, update and operate and is interface-friendly with versatile functions.

Key words: submerged are welding, database technology, knowledge representation, knowledge base, expert system