Design And Implementation Of A Long-distance Reading System

With the increasing learning burden of teenagers and the widespread popularity of electronic products,the prevention and control of myopia among teenagers is facing an increasingly severe test.At present,many kinds of medical methods that can treat myopia or control the progress of myopia,such as massage,acupuncture,and multifocal glasses,do not control the progress of myopia well.Medical devices such as orthokeratoscopes are not suitable for most teenagers because of the strict operation methods.Most ordinary frame glasses are still the first choice for ordinary teenagers.However,ordinary frame glasses can only meet daily learning and living functions.If it is still not possible to reduce the use of the eye and use it properly during wearing,myopia will continue to develop rapidly as before.In this paper,through animal experiments and adolescent tracking experiments,the relationship between defocusing theory and myopia control in adolescents is studied.It is found that positive defocusing can inhibit the progress of myopia,and further combined with the research of light on the progression of myopia,a set of single chip microcomputer is designed.Long-distance read-write system.The early stage of this design uses simulation design based on defocusing theory.Under the circumstances that the general learning pressure cannot be effectively reduced,young people can have a good learning environment that maintains positive defocus and scientific light in normal learning,thereby slowing the progress of young people's myopia.In order to better integrate the reading and writing system into the learning environment of young people,this design hides the reading and writing system under the desktop,and uses the single-chip microcomputer to control the motor to complete the lifting function of the reading and writing system.In the design of the transmission structure,compared with the commonly used transmission structure and motor type,the AC permanent magnet synchronous motor is selected as the power source,and the structure is driven by the rack and worm and the worm gear,and a soft start control of the motor is designed.The system solves the problem of large motor starting current.This design also uses a single-chip microcomputer to complete the design of the infrared remote control system and the light-sensing lighting system,so that the system has a one-button start function,infrared remote control function and the lighting system that automatically adjusts with the change of the four-directional light,which is simpler in use and makes teenagers' The prevention and control of myopia is more scientific and effective.This article is based on myopia prevention and control work in China,combined with the author's work unit,through the animal experiments with a control group and the follow-up analysis of adolescents,to determine the effect of positive defocus on myopia progress;And research,it was concluded that the reading and writing system should use a pure optical design with dimming function;a set of lifting system that can be hidden under the study table was designed,the reading and writing system was placed into it,and the soft start of the motor was designed Hardware circuit;Finally,a single-chip computer and multiple integrated chips are used to complete the one-key lifting function of the reading and writing system,infrared remote control function,and the lighting system that can automatically adjust the four-way photosensitive.This article contains 37 pictures,5 tables,and 28 references.