Research On The Intelligent Obstacle Avoidance Shoe Cover For Assisting The Blind To Travel

China is the country with the largest number of blind people in the world.Although the number of blind people is huge,the number of guide dogs is limited.In many areas,tactile paving built to assist blind people to travel are also occupied,missing or other phenomena,affecting the daily travel of blind people.With the continuous progress of science and technology,intelligent wearable products have brought more convenience for the blind to travel.In order to meet the blind people and other visually impaired groups daily travel needs,an intelligent obstacle avoidance shoe cover to help them travel is researched,which helps them better integrate into society.The specific research contents and methods are as follows:(1)Through visiting the blind massage shop and the blind coffee shop,we conducted research on the travel needs of the blind and the use of existing blind equipment.In consideration of the particularity of the research object,it is conducted in the form of interviews and communication to summarize the problems and needs of blind people’s travel,clarify the design orientation,refine the functional requirements,and prepare for the subsequent development.(2)According to the preliminary design positioning and functional requirements,the buzzer sound reminder and various sensors are used for functional design,including walking,going up and down stairs.This is aimed at functions such as obstacle detection,preventing stepping on the air,defining the first and last stairs and other road conditions,and avoiding false alarms caused by gait angle to the ground during walking.(3)Analyze the three motion characteristics of walking and going up and down stairs,and carry out the detection experiment of functional parameter threshold.During walking,the threshold of gait angle to the ground range is detected to prevent false alarm,and the threshold of gait height range is detected to prevent stepping on the air.When going up and down the stairs,the threshold of horizontal distance and height distance from the step are detected respectively,so that the blind person can regularly sound a reminder and help them identify the first step and the last step.(4)Program the system device according to the detection threshold and the main program flow,complete the design practice of the blind obstacle avoidance shoe cover,and finally conduct functional experiments and evaluation.