Research And Design Of High Power Wearable LED Phototherapy Apparatus

As a medical light source of Light Emitting Diode(LED)has the characteristics of safety,no side effects,convenience,and low cost.More and more phototherapy instruments use LED as the treatment light source,such as the fat reduction instrument with LED light source and the photodynamic phototherapy instrument for the treatment of port wine stains.However,most of these optical medical products are bulky,heavy,and complicated to operate.The wearable LED phototherapy instrument designed in this paper can effectively avoid these shortcomings.Different applications of phototherapy instruments have different requirements for light distribution,and the panel light source needs to be arranged and distributed according to the requirements.According to the specific use requirements of the phototherapy instrument,this article takes the light distribution as the research target,and carries out a reasonable optical design of the LED array light source,which can greatly improve the treatment rate of LED light medical products.,which can greatly improve the treatment rate of LED light medical products.However,with the high-density arrangement of small LEDs,the power consumption increases,and the heat generated also increases with the increase in the light intensity of the LED.We all know that the chip temperature is inversely proportional to the life of the LED,so a good heat dissipation system can be used to improve the life of high-power LED panels.In order to obtain better light efficacy and longer LED life,this article combines the use conditions of the wearable LED phototherapy instrument,determines the heat dissipation plan to complete the heat dissipation design and establishes the heat dissipation entity model of the high-power LED phototherapy instrument,which can meet the basic requirements of use.The main contents and results of the research are as follows:First of all,the object of wearable medical equipment is the human body,and the surface of the human body is irregular in shape.This requires consideration of the curved surface treatment light source illuminating the curved object(human body),and how to design the curved LED array to make it uniform on the irradiated part The illuminance distribution has practical research significance.In this study,a curved human body was used as the irradiated object,and an LED light therapy instrument illumination model was built.An objective function reflecting the illuminance distribution is established for the light field distribution of the curved LED array and the curved target receiving surface(human body)in the illumination model,and the influencing parameters of the illumination uniformity of the illumination model are determined.Use Trace Pro software to create an illumination model,simulate the illuminance distribution of the two arrays and optimize the LED curved surface array distribution by two-way combination,and obtain a uniform illuminance distribution on the curved target receiving surface.Secondly,the heat dissipation design of the curved near-field LED array panel of the phototherapy instrument was completed,and the influence of various heat dissipation materials,especially foamed copper,on the temperature distribution of the LED panel was analyzed through experiments,and the heat dissipation effect of different types of foamed copper on the LED panel was focused on.Then,according to the wear characteristics,the vortex flexible heat dissipation and ventilation duct structure design is adopted,and combined with the human body’s temperature tolerance characteristics,a simulated human body thermal effect experiment is carried out to analyze the temperature of the LED panel with or without heat dissipation under the condition of a constant temperature of 36.5℃The relationship over time.Finally,the three major components of the wearable LED phototherapy instrument are introduced,the LED light-emitting part,the phototherapy instrument structure part,and the circuit control part.Use Solid Works software to design the structural part of the phototherapy instrument,including LED panel distribution design,LED panel packaging design,air guide and heat dissipation design,and heat dissipation air cavity design.And use the COMSOL Multiphysics software to conduct three-dimensional simulation of the internal velocity field of the heat dissipation pipe,and use the method of different main pipe tapers to improve the uniformity of the air to achieve the purpose of rapid and uniform heat dissipation.