The Design And Development Of Auxiliary Braille-reading System Based On ARM

Visual sense is the main feeling channel for perception and awareness of the outside world,more than 80% of external information are accepted from the visual.According to last investigations by the World Health Organization(WHO),more than 161 million people suffer impaired vision worldwide in 2002,the blind are about 37 million.The population of sightimpaired increased to 285 million in 2010,39 million are blind,in which China accounted for 20%.Besides,according to the second sample survey data of NATIONAL DISABILITY estimates,in 2006 the number of people with visual disabilities reaches about 12.33 million,So it is a responsibility for us to add development of blind auxiliary system to achieve a harmonious society,which is a long way to go.This paper is a research and application of tactile feedback mechanism in virtual reality serving for blind auxiliary system.Based on the status quo and application of blind reading system home and abroad,we design and develop a portable reading and displaying system of braille which can be transplanted across platforms.Especially for the blind reading system running on mobile terminal is deeply designed and analyzed,Hardware platform using STM32F103 for the master chip development board produced by ALIENTEK Company,involving the core translation of the external communication system,designing for circuit system structure,thermal design and fault diagnosis and other technical analysis.Firstly,this paper discusses the mechanism and research status of Braille translation,especially Chinese character braille translation.On the basis of this,we develop a portable and reliable C language-based stable and reliable Chinese-blind translation system using VisualStudio2015.The system is based on the existing Braille translation rules widely used in China,and carries out multiple text tests on the host computer and the performance resource analysis of the system program to test the execution effect of the program.Secondly,in this paper,the translation system will be transplanted to the multi-function blind reading system,which based on STM32 controller,external mobile storage,touch point display,input and output module.First of all,using the reverse design method of mechanical and electrical products,and then designing and developing a kind of reading terminal device for auditory and tactile synchronization,which will be as the target ontology,designing and optimizing the whole control system,including the communication interface,the design of control circuit,the chip selection,the development of peripheral driver,the man-machine interface,the terminal information synchronization project and so on,the software design of the whole reading system using keil MDK5 application development platform,the layout design of circuit board using DXP hardware circuit design platform of Altium company.At the same time,we use Proteus to simulate the part of the reading system.Thirdly,when we have completed to make prototype,build system and transplant program,it will verify the function and test hardware in the mobile terminal prototype,including SD card initializing,text test-reading,multi-terminal synchronization coordination,and the thermal stability analysis of the hardware circuit and the response analysis of listen to the touch reading device.Lastly,some problems are discussed for the blind reading system,and then putting forward a design scheme for optimization and innovation,including support multi-language,the integrate of function,processes,optimization of the structure,so as to speed up the commercialization of blind reading system products,enhance the level of education,promote the socialist harmonious process of our country.