Designing Of Finger-Cuff Haptic Interaction System For Mobile Terminal

In the daily life, most information are obtained by the visual tunnel, however, touch, which is an important access to get information, has not been made full use of. High efficient haptic rendering technology is the hotspot in the field of virtual reality. It can strength the immersion and reality of virtual reality, and provide more real and direct interaction experience, thus to push the communication between the virtual world and human into a new stage. As the development of the haptic rendering technology, portable haptic interaction system, which can seamless joint with the mobile terminal is increasing rapidly. The combination of haptic interaction technique and mobile terminals allows the operator to touch, perceive and manipulate virtual objects on the mobile terminal and to interact with virtual environment. Therefore, it significantly expands and extends the application range of the mobile terminal, and has broad market value and application prospect.This thesis designs a wearable finger-cuff haptic equipment with the function of interaction and tactile perception around the research of finger-cuff haptic interaction system for mobile terminals. The main contents of this thesis are as follows:(1) The hardware of wearable finger-cuff haptic system on the ARM STM32 embedded platform which has transplanted the embedded real-time operating system μC/OS-II was designed with the use of the WiFi module, MEMS attitude sensor, pressure sensor and piezoelectric actuator array. (2) A haptic interaction and perception system based on Java language was built. The system can extract the touch features of the object, such as three-dimensional shape and roughness from the image, render the virtual scene with the help of OpenGL ES, as well as realize tactile display with the aid of wearable finger-cuff haptic equipment. (3) Tactile rendering methods for three-dimensional shape, roughness, hardness and braille were proposed and verified by tactile perception experiments.The research focus and innovations of this thesis are:(1) Designing a new vibrating haptic interaction device for mobile terminals. (2) Realizing the function of finger posture input and haptic interactionby using pressure sensor and MEMS attitude sensor. (3) Studying the haptic algorithms of three-dimensional shape, roughness, hardness and braille based on the vibration tactile display device, and implementing these algorithms on mobile terminals.