Inspection Ocr Technology-based Aircraft Data Collection System Design

Aircraft scheduled maintenance data is very import for analyzing a aircraft airworthiness and monitoring reliability of systems of a aircraft .but now, these datum are written on paper job cards. So that, a lot of scheduled maintenance datum cannot been processed and used in trend analysis and prediction of failure for performance of a aircraft. The objectives of the paper are designing a system of collecting data from aircraft scheduled maintenance and researching on critical technology. This paper work is following:(1)Research of current situation of collecting aircraft scheduled maintenance data; mainly disadvantages from current situation are explained. In order to solve this problem, OCR technology is applied and feasibility is analyzed.(2)System requirements are studied, including system purpose, main function, operating environment and user analysis. Domestic e-maintenance requirements are described comprehensively.(3) System design conception of collecting aircraft scheduled maintenance data based on OCR technology is presented. The system includes four functional modules, including preprocess image, segmentation, feature extraction and sorter design, and after-treatment.(4)After-treatment is the critical technology for this system. Method of similar font identification based on context meaning is described.(5) The concept of maintenance specialize vocabularies database is presented in this module. Database is established using Access2007.(6) Program is coded with friendly interface. Through example test, this program system is proved effective to identify aircraft scheduled maintenance data.