بررسي عوامل موثر در ايجاد انرژي الكتريكي در نخ هيبريد سيمي

چكيده انگليسي :

Evaluation of Effective Factors in Generation of Electrical Energy in Wire Hybrid Yarns Javad Yekrang j yekrang@tx iut ac ir Date of Submission 7 22 2011 Department of Textile Engineering Isfahan University of Technology Isfahan 84156 83111 Iran Degree M Sc Language FarsiSupervisor Dariush Semnani d semnani@cc iut ac irAbstractSmart textiles can be stimulated by mechanical thermal chemical magnetic or other environmental stimuliand respond in a controlled and predicted manner Smart textiles are developing at a rapid rate for manyindustrial and commercial application recent years One of the novel fields in this section is energyharvesting concept An energy harvesting also called energy scavenging or power harvesting devicegenerates electric energy from its surrounding using method of direct energy conversion techniques Thismeans that those kinds of devices don t consume fuel or substance In this research We have focused on development of a type of wire hybrid yarn that can create electricitycharge via elastic properties of polyurethane yarns We coated Lycra yarn with ferromagnetic cobalt micropowder through a designed coating method In this method we used two capillary tubes with 2mm diameteras coating solution containers First tube contains a special resin for pretreatment of Lycra surface andsecond tube containing cobalt particles coating solution Each of these tubes is equipped with a 1mL syringeto maintain constant level of coating solution in them After this process the coated Lycra passed from aheating zone to stabilization of coated materials on the yarn surface Finally the coated yarn was winded on abobbin After complement of coating process we subjected the coated yarn to strong external magnetic fieldof a solenoid to achieve cobalt particles unidirectional magnetic field on the surface of Lycra yarn In thefinal step the fine cupper wire is twisted around the coated Lycra yarn with hallow spindle spinning methodFor twisting the cupper yarn we used a special twisting machine that it enables to convert to hallow spindlemechanism and wrapping step is done with 1000 and 2000 twist per meters To evaluating the effectiveparameters on electrical charge induction in the developed hybrid yarn with considering the physicalconcepts and theoretical governing equations on induction current calculations we have evaluated threeparameters as effective factors on produced induction electric current which include magnetic mass numberof wire turns per meter and yarn stroke frequency Regarding to these parameters the effect of each factorhas been evaluated in inducted electricity charge in hybrid wire yarn We produced four samples with 1000and 2000 TPM of cupper wire and 10 and 20 of metal powder in coating solution and we tested samplesat 1 18 0 785 and 0 55 Hz frequencies To obtain these frequencies we have simulated the elastic manner ofLycra yarns by a simple mechanism that consists of a stepper motor and a speed controller to convertrotational movement to linear traverse motion of tested sample The stepper motor enables to rotate at 150 100 and 70 RPM Considering this condition we equipped the stepper motor with a with a 3 cm diameterpulley to obtain the frequencies Also we constructed a close circuit of twisted cupper wire and a 2M resistant to measuring the induction current During loading and unloading of hybrid yarn induction currentwave has been recorded by digital oscilloscope The results indicate that each of mentioned parameters has positive effect on induction current value and themaximum of created induction current is 98 pA In this work a novel method for energy harvesting is presented by textile potential An electromagnetic wirehybrid yarn is developed to achieve electricity which harvested from elastic properties and electromagneticinduction of ferromagnetic metal coated Lycra Keywords Energy scavenging Electromagnetic Wire hybrid yarn Induction current VII

يكرنگ، جواد

بررسي عوامل موثر در ايجاد انرژي الكتريكي در نخ هيبريد سيمي

برداشت انرژي , الكترومغناطيس , جريان القايي