The Design Research And Optimization Of Electromagnetic Braille Display Device

All over the world,there are about 285 million people with varying degrees of visual impairment,of which 39 million are blind.China has the world's largest group of the blind,the data for 2012 was 600-700 million,not including tens of millions of people with visual disabilities,for such a large group of amblyopia,but also vulnerable groups,they access to information and knowledge is very limited.Based on tactile instead of damaged visual way is an effective way for blind people to acquire information.This paper designs a device for blind learners-electromagnetic Braille display device,which can help solve the problem of learning and education of the blind.It is not only respect for their education rights,but also the proper meaning of social fairness and justice.The main work of this paper is the design and optimization of the mechanical structure of the electromagnetic Braille display device.The main contents are as follows:The first chapter introduces the research background and significance of the Braille display device,the related knowledge of Braille and the research examples the Braille display device with different drive forms in the world and the advantages and disadvantages of the driving,Describe and analyze the research difficulties of the electromagnetic Braille display device,And clarifies the research methods and contents of this paper.Chapter 2: Based on the first-generation Braille display device,the second-generation Braille display device was designed and optimized.The structure and dimension of the second-generation Braille display device were optimized by using Pro / E and redesigned the braille pin structure;in the material,the replacement part of the material parts.Installed the machined parts debugged,finally carries on the assembly of the Braille display device.In chapter 3,an adaptive network fuzzy inference system(ANFIS)is used to optimize the parameters of the Braille display device: input voltage,resistance of electromagnetic coil,electromagnetic force and device temperature.The electromagnetic force is measured by the Grip Force Distribution System which developed by Tekescan corporation and the thermocouple sensor measure the device temperature respectively to build the data set for training,so that the parameters of the Braille display device can be selected in the given the relevant constraint conditions.In the fourth chapter,after selecting the parameters of the braille display device,the electromagnetic force of the electromagnetic braille display device and the temperature of the device are compared before and after the optimization.The results show that the electromagnetic force of the optimized Braille display device is greater than the pre-optimization electromagnetic force,and the temperature rises slowly during the test time;and analyse the frequency of Braille display;The experiment system of braille translation system and the braille character perception experiment are built to verify the reliability of Braille translation system and Braille display device designed in this paper respectively.Chapter 5: Summarize the whole text and prospect of electromagnetic Braille display device.