| Nowadays, as the rapid development of science and technology as well as the intensive mixture of different disciplines, people began to pursuit diversified experience of work and life. Virtual Reality(VR) and the related intelligent wearable devices are the most advanced representatives of course interacting, which have gained focus from all over the world and step into citizens daily life. Among all these kinds of intelligent devices, data glove is the most indispensable one for VR application, cause it can not only detect human gesture but offer rich kind of feedback conveniently. However, the existing data glove generally have some drawbacks, such as high cost, low efficiency and lack of unified port for feedback. To solve the problems above, the thesis proposed an improved data glove for VR application, then tested the practical performance of the data glove.The content of the thesis is arranged as follows:1. Scheme design. Firstly, the development of data glove at home and abroad and the research meaning are expounded, from which, the advantages and the drawbacks of the exist data gloves are analysised and introduced in detail. Then the overall project of the data glove which is aimed at solving the drawbacks above is proposed.2. Physical design. The external structure of the data glove is designed firstly, then the kind and principle of the sensors are introduced, which is the main component for the data glove. After that, to exam the feasibility of the improved project, the whole model of the arm and hand is established with the inertial navigation technology.3. Circuit design. Selecting the suitable sensors and lower computer for the data glove, then the resources and function of which are given. According to the functional requirement, the double selective switch circuit is designed. And the optimization of the circuit is provided in order to strengthen the stability of the system.4. Software design. The software can be divided into two parts. The first part is the program of the lower computer, by which, the double selective switch is controlled and the gesture data is collected. While the second part is the program of the upper computer, which is able to not only calculate the coordinate of user's hand but to generate animation. The lower computer and the upper one can communicate with each other by serial port, with their co-work, the system has the ability of orientation and feedback. To provide effective digital display, the user interface designed in MFC.5. System verification. Because of the zero drift of the sensors, the proper filtering algorithm is adopted, and the attitude accuracy has been raised to 0.2 degree. And the magnetic declination is corrected in order to improve the stability of the system. For the purpose to simplify the procedure of model length measurement, the rectifying algorithm is proposed, which makes the using process of the data glove more convenient.6. Experimental test. A interferential experiment is designed to test the performance of the data glove system, in which, there is a virtual globe is drew in animation. The operator can monitor the position of the hands and the globe by the visualization interface, when the hand touch the virtual globe, the feedback signal would be transformed by the digital I/O port, finally the data glove would work as a complete system. |
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