Research On Key Technologies Of Gas Gate Station Simulation Training System

Equipments in the gas gate station have characteristics of the fire and explosive, continuous operation, enormous heat and pressure, and high cost. So gas industry has higher demands for operator’s operation ability and level. Pre-service training for operators is particularly important. At present, gas industry carries out training on operators in the three forms:classroom teaching, in-site perception and building virtual gas station. The low-quality, high-risk and high-cost training forms can’t satisfy the demand of training, bringing great potential safety hazard of future work. In recent years, three-dimensional simulation training system is attracting more and more attention for its low costs, short training period, high training quality and high safety performance. Now it has been maturely applied in many industries. Therefore, this thesis studies the key technologies of gas gate station three-dimensional simulation training system, which has important practical significance for the training of gas industry.This thesis studies the system modeling technologies including solid modeling of equipment, behavior modeling of equipment and scenario modeling. The method of reusing solid model and functional elements of equipment to constitute a new element to build scene is proposed. And on this basis, firstly, solid model library is built and optimization strategies of models are proposed. And then the method of description of functional properties of the equipment and scene organization in XML is proposed to construct device features library.This thesis studies simulation technologies of gas gate station simulation training system base on OpenSceneGraph (OSG). Firstly the working mechanism of scene management and rendering process based on OSG is deep researched. Secondly, in order to solve the problem of equipment movement in the scene, the motion control technology of model is studied. Thirdly, this paper studies the technologies of custom scene roaming and path roaming and designs two collision detection algorithms for different scene features to achieve the roaming function. Technology of render to texture (RTT) and the technical principles and methods of using RTT to achieve scene navigation are studied in order to make the roam more purposeful. Fourthly, this paper studies modeling method and rendering procedure of particle systems for simulating the irregular objects on the scene. At last, the implementation of three-dimensional virtual sound is researched to enhance the authenticity and immersion of system.Based on the reusable, scalable and maintainable principle, this paper designs architecture framework and functional modules of gas gate station simulation training system. Design method of framework about OSG embedded in Qt and interactive method of interactive operations on devices are studied. And on this basis, this paper researches the method to decouple the user interface and business logic. This method dynamically generates simulation interface when simulation with describing static interface layout in XML.Finally, based on these technologies above, this paper achieves the gas gate station simulation training systems. The system has functions of interactive interface management, basic information query of device and gas station, device status display, visualization roaming, scene navigation, three-dimensional simulation of typical business workflow and multimedia assisted teaching, etc. Experimental results show that the system can reduce training costs and effectively improve the training quality and gas gate station safety performance with strong sense of immersion, which has theoretical value and application value for the gas industry training.