Study And Development On Ship Plate’s Deformation Detection And Process Guidance System Based On Combination Of Virtuality And Reality

Aiming at the ship plate’s deformation problem in the ship plate manufacturing process, the shipyard must detect the ship plate’s deformation using precision measurement technique and choose the appropriate flame deformation correction process to correct the deformation. Currently, most domestic shipyards use the off-line measurement technique to detect the deformation and choose the flame deformation correction process with the operation worker’s experience. That makes it difficult to estimate the ship plate’s shape accuracy immediately in the ship plate manufacturing process. The efficiency is low, the controllability is poor, and the ship plate’s quality can’t be guaranteed. Therefore, realizing the on-line detection and process guidance of the ship plate’s deformation is the key to improve the effic iency and quality of the ship plate manufacturing.The paper studies the registration problem of the model’s position and attitude in the virtual scene and real scene. The virtual scene where the objects have consistent initial positions and attitudes with the corresponding objects in the real scene is established. The synchronous update principle during the operation process is studied and the corresponding consistent relationship of the virtual scene and real scene during the operation process is retained. On the premise of registration and synchronous update, the correction operation guidance that the position and shape of the correction area is on-line indicated according to the position and shape in the virtual scene is realized. The method of the integration of the fast measurement and position indication is studied and the hardware equipment composed of a two-dimens ional turntable and a laser ranging sensor is manufactured, realizing the integration of the deformation on-line measurement and position indication. The points cloud registration of the ship plate’s measuring points cloud and virtual points cloud is realized based on SVD matrix algorithm and ICP algorithm. The ship plate’s shape deviation is calculated based on correspondence estimation algorithm. The oral empirical flame deformation correction operation is standardized and parameterized to form flame deformation correction process. The flame deformation correction process database is developed based on the process rule reasoning. The appropriate flame deformation correction process is automatically selected from the database according to the ship plate’s deformation parameters and the structure parameters set by users.The paper study and develop a set of software and hardware system platform based on virtual reality to realize the integration of deformation on-line measurement and correction process guidance. The practicability of the system platform for the ship plate manufacturing scene is verified with the example of the real ship plate’s deformation detection and deformation correction.The method of the integration of the on-line detection and process guidance proposed in the paper not only can be used in the shipbuilding industry, but also can be used in many industrial fields such as aerospace, automobile manufacturing.