Research And Experiment Of Double Frequency Up-conversion Harvester Based On Magnetostriction Effect

In recent years,with the rapid development of micro electromechanical technology such as micro electronic devices,micro sensors and portable electronic devices,the application of these devices is faced with the problem of long-term,sustainable and effective energy supply.Therefore,vibration energy recovery technology has been widely studied.At present,most miniature sensors and portable electronic devices are powered by traditional batteries,which are difficult to be replaced in some special occasions and have short service life.In this paper,the recycling of human walking in city public square energy as the background,thought plaza,low power consumption micro electronic equipment power as the research target,this kind of new energy materials based on magnetostrictive materials to develop a magnetic telescoping double l frequency energy recovery device,on this basis,the electricity generating performance of the device on the study of theory and experiment.Firstly,this paper introduces the production and development process of magnetostrictive materials,and analyzes its application characteristics.On this basis,the mechanical-electrical conversion principle of magnetostrictive materials was analyzed,and a mathematical model of magnetostrictive vibration energy recovery was established.Based on the basic theory of the magnetostrictive effect,a magnetostrictive double-lift energy recovery device is developed.According to its working principle and technical index,determine the overall scheme of magnetic strictive energy recovery device,on the basis of the level 2 litres of frequency system organization,energy collector,energy recovery and storage module and auxiliary module such as part of the detailed structure design,satisfy its compact structure,convenient disassembly,light weight,small size and other technical requirements;After processing,assembly and debugging,the prototype and modular installation of the energy recovery device were completed,which laid a foundation for the subsequent experimental research of the energy recovery device.Secondly,in order to measure the power generation performance of the magnetostrictive energy recovery device developed in this paper in practical application,the dynamic power generation characteristics of the energy acquisition system with the magnetostrictive cantilever beam as the core are analyzed.According to the Villarry effect and Faraday’s law of electromagnetic induction,the stress-magneto-electrical mapping model of the magnetostrictive energy recovery system was established to explore the factors affecting the power generation of the energy recovery device.Based on the Euler-Bernoulli beam theory,the static and stable force analysis and dynamic vibration theory analysis of the cantilever beam are carried out.According to the theoretical analysis,the design of the magnetostrictive cantilever beam and the sticking position of the magnetostrictive material are guided,so that the energy recovery device can obtain the best power generation performance.In addition,the output voltage,output power and energy conversion efficiency of the magnetostrictive energy recovery device are also analyzed.Finally,in order to validate the proposed magnetic telescoping double l frequency energy recovery device the rationality of structure design and its effect of energy recovery,testing energy recovery device was set in a laboratory environment experiment platform and simulate the actual square,completed its frequency effect validation experiments,energy acquisition system power characteristics experiment and recycling energy to drive the electronic equipment,etc.Explores the input frequency and the sampling frequency of voltage,input frequency and voltage and gathering power,people walking speed and stamped on the relationship between voltage,studied the effective load power and payload voltage and payload resistance under different frequency,the relationship between the energy recovery unit are analyzed the influence of mechanism parameters on power performance.The experimental results show that the frequency ratio of the lifting mechanism of the magnetostrictive energy recovery device developed in this paper is 8.13,the maximum output voltage is 10.06 V,the maximum output power is 31.3m W,the recovered energy can light up 10*10LED,and drive electronic meter equipment for 90 minutes.