外力对逆磁致伸缩索力传感器影响研究  

Study on Cable Tension Stress Influence of Cable Tension Sensor Based on Villari-Effect

作　　者：姜建山[1,2] 陈伟民[2] 

机构地区：[1]重庆交通大学信息科学与工程学院,重庆400074 [2]重庆大学光电技术及系统教育部重点实验室,重庆400030

出　　处：《传感技术学报》2009年第3期438-441,共4页Chinese Journal of Sensors and Actuators

基　　金：重庆市科技攻关项目资助(2008AC2009);国家863计划项目资助(2006AA04Z433)

摘　　要：基于索力传感理论模型和环式结构的索力传感器,对索力测量原理做了推导,传感器输出感应电压与激励磁场变化、外力变化、某一激励磁场下的材料磁导率及空气间隙尺寸、线圈密度等有关。重点分析了加载外力对传感器输出的影响。在稳恒直流激励下,当外力缓慢变化时可通过感应积分电压反映外力;当外力交流变化时,可通过感应电压求得外力,感应电压幅值与加载外力的频率成正比。最后,确定模拟实验参数,对传感器进行了仿真。结果表明当外力缓慢变化时,感应积分电压与外力成线性关系,传感器的灵敏度与线圈匝数,材料逆磁致伸缩系数成正比。Basing on theory model of cable tension sensor and one loop-shaped stimulative structure of cable tension sensor, the basic principle of cable tension measurement is discussed. Sensor output may be determined by magnetic field, stress, air clearance, magnetic permeability and inductive loops denseness. The sensor output effects resulting from sensor stress are deeply analyzed when magnetic field is constant. In addition, when stress changes tardigradely, cable tension stress may be measured by measuring inductive integral voltage. When stress changes expeditiously, cable tension stress may be measured by measuring inductive voltage. Sensor sensibility may be determined by stress frequency, inductive loops denseness. Finally, the sensor output effects from stress changing have been analyzed with emulational method. The results indicate that when stress changes tardigradely inductive integral voltage is proportional to cable tension force, sensor sensitivity is determined by inductive loops denseness and villari-effect coefficient.

关 键 词：逆磁致伸缩 钢缆索索力 影响因素 传感器灵敏度 

分 类 号：TP212.12[自动化与计算机技术—检测技术与自动化装置]