Research Of The Assembly Process In Augmented Reality Mechanical Assembly Environment

The purely virtual assembly system based on 3D environment lacked of direct feedback channel. It only supported users with limited "real" experience, while consuming a large amount of computing resources. It was difficult in complex product assembly environment to adapt to complex modeling, real-time interactive simulation, etc. The enhanced assembly technology of Mixed real objects (such as physical prototypes, spare parts, tools, etc.) and virtual designed objects could avoid the above problems.That Augmented Reality assembly technology was one of the important applications in the field of design and manufacture with Augmented Reality technology had caused more and more attentions of the industrial sector and research institutions.This paper analyzed the assembling process of V-R (vitual and real) parts in Augmented Reality assembly. Focus on the V-R assembly methods, movement path planning, collision detection and three-dimensional force feedback technology.This paper completed the following work:1. Researched on camera calibration technique and visual imaging technology of Augmented Reality. Systematic analysis the relationship of image coordinate system, camera coordinate system and the world coordinate system. Analysed the visual imaging process, multi-marker detection, more virtual objects generation and V-R parts assembly process. Focus on the optimization selection of a variety of assembling ways and the V-R parts movement path planning.2. Study on the possible collision situation of V-R parts in V-R assembly course.Proposed a novel collision detection method ShellTest. According to the structural and shape characteristics of the real parts, virtually constructed the collision points and regions of V-R parts, which were given the definition of three-dimensional coordinates, then carried out the collision detection test for the results.3. Study on their relationship between collision result and output state when the V-R parts were colliding.With Falcon force feedback device, achieved the coordination collection of V-R parts and output of feedback force. In Augmented Reality Mechanical Assembly Environment, tested the collision of the virtual ball's six directions in collision regions, and outputed the feedback force generated by each with Falcon device. Based on the test results, to infer:the method of shell test for the V-R collision detection had a high feasibility.Test results showed that:the collision detection algorithm based on shell test, with the supporting of the ardware and software technologies in three-dimensional force feedback, had good applicability for studying the mechanical assembly of augmented reality and the reality effects of the impacts and feedback questions.