Design Of Wearable Diving Booster System With Rechargeable And Intelligent Variable Speed Function

Nowadays,with the over-exploitation of land resources and the immaturity of new energy development technology,human beings turn their eyes to oceans.Oceans cover about 71% of the area of the earth's surface,and it has rich biological resources,mineral resources,energy,water resource,etc..So the development and utilization of ocean have increasingly become the strategic focus of the world.China is in urgent need to further development of Marine technology to promote the Marine operation level and ability.As a result,many institutions researching wearable exoskeleton equipment begin to set foot in researching and developing underwater wearable exoskeletons.However,due to the harsh and dangerous ocean underwater environment and the unpredictability of the water of oceans,the number of wearable underwater exoskeletons is still few.When diving underwater,most of the human body's energy is used to overcome considerable water resistance,which makes it impossible for ordinary people to stay underwater for too long only by relying on their own energy.At the same time,the endurance of wearable devices also determines the diving time.Therefore,this paper will analyze the resistance of human body at different underwater speeds and design a wearable charging intelligent speed regulating diving assistance system.First of all,the overall design of the diving power system is carried out in this paper.By means of an adult human body model of fluid-solid coupling analysis,it is concluded that under different water flow rate of water body resistance.And through the animation simulation,the centre of the gravity when human diving underwater is clearly shown.By the achievements mentioned before,the structure,material and the appearance of wearable diving booster system,the selection of propeller type,the choice of the acceleration sensors and their layout,the kind of the power system and the intelligent variable speed system control strategy are all determined.Secondly,this paper shows the design of the limb frequency acquisition system,which is made up from three aspects: hardware design,software design and experimental debugging.Through the three-axis acceleration data collected by the acceleration sensor,the axial acceleration data with large periodic variation is selected for digital filtering processing.Whether it meets the condition of effective limb swing will be judged immediately.The frequency of limb swing is calculated after the set number of times is collected.Then,the design process of the intelligent variable speed system based on limb frequency control is described in details.According to the frequency interval calculated by the limb frequency acquisition system,the intelligent variable speed system of the propeller outputs the PWM signal set in the interval to drive the propeller motor to rotate.At the same time,the speed of the propeller is measured by the encoder.PID control is used to ensure that the speed of the propeller is always stable near the set speed value.Finally,the portable charging device equipped with the exoskeleton system is designed in this paper.The purpose of the portable charging device is to improve the endurance of the whole system.Firstly,the structure of the charging system and its generating principle are designed and explained.And then the electric energy generated by the designed charging system is deduced by formula.The method of generating maximize electricity is illustrated by drawing a diagram.