Research And Experiment On The Dynamic Characteristics Of Intelligent Artificial Bones

In recent years,with the development of medical science and technology,artificial bone technology has become more and more widely used in medical fields such as bone defects and bone repair.However,there is currently a lack of wireless and intuitive detection capabilities for postoperative use of bone repair or artificial bone transplantation.To this end,this paper establishes a dynamic artificial force model of intelligent artificial bones,and uses this as a theoretical basis and combines wireless passive detection technology to develop aspects of intelligent artificial bone preparation and modeling,dynamic stress monitoring characteristics,and dynamic energy harvest characteristics theoretical and comprehensive experimental research.Firstly,the intelligent artificial bone was designed and prepared based on the detection principle of magnetostriction effect.The magnetostrictive material Fe40Ni38Mo4B18(2826MB)was used as the strain sensitive element to realize the wireless passive dynamic detection of external stress.The three-dimensional model of the intelligent artificial bone is obtained by 3D laser scanning based on real human bones,and subsequent processing is performed,and finally,3D printing technology is used to prepare the intelligent artificial bone entity.According to the material,force characteristics and contour of the intelligent artificial bone In terms of structural characteristics,according to the input and output conditions,a dynamic mathematical model of the second-order system based on Laplace transform is established.The key parameters of the model are determined according to the actual situation of intelligent artificial bones.System response characteristics of the dynamic stress model of intelligent artificial bone under underdamping state are analyzed.Secondly,the dynamic stress characteristics of intelligent artificial bone were studied.Based on the motion state of real human beings and the stress characteristics of real human bones,the stress characteristics of intelligent artificial bones were analyzed,and the experimental method of dynamic stress characteristics simulating the stress of real human bones was determined.Based on the theory of the dynamic force model of the intelligent artificial bone,the input and output characteristics of the model based on the transfer function are analyzed,and the simulation results of the intelligent artificial bone under three kinds of pulse,step and sine signals and different parameters are obtained by using Simulink software.For the purpose of dynamic monitoring,a flexible excitation coil and a detection coil are designed,the composition of the excitation system and the detection system is determined,the optimal excitation voltage and excitation frequency are determined through experiments,and the realization scheme of the intelligent artificial bone detection system is determined based on the principle of wireless passive detection.In addition,the energy harvest characteristics based on human motion were studied by using intelligent artificial bone.Using Faraday law of electromagnetic induction and Villari effect,the stress-magnetic-energy conversion relation of intelligent artificial bone is established,and the energy harvest characteristics under the action of pulse,step and sinusoidal signal are analyzed.The energy harvest scheme of intelligent artificial bone is determined,and the energy collection system and rectifier module are designed and made.Finally,the intelligent artificial bone dynamic loading experiment platform and its detection system were built,and the intelligent artificial bone experimental research was carried out,including the dynamic stress characteristic experiment of the intelligent artificial bone and the dynamic energy harvest experiment.The input and output of intelligent artificial bones under different loading frequencies and different loading forces are obtained,and their dynamic stress characteristics are analyzed.According to the experimental results of different loading frequencies and different loading forces,as well as the actual energy output under different loads,the dynamic energy harvest characteristics were analyzed.The dynamic performance of intelligent artificial bones was analyzed and verified from multiple angles.