激励磁场对逆磁致伸缩索力传感器影响仿真  

Simulation of the Influence of Invigorative Magnetic Field on Cable Tension Sensor Based on Villari-effect

作　　者：姜建山[1,2] 陈伟民[1] 

机构地区：[1]重庆交通大学计算机与信息学院,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：《计算机仿真》2009年第5期345-348,共4页Computer Simulation

基　　金：国家863计划项目(No.2006AA042433);重庆市科技攻关项目(No.2008AC2009)

摘　　要：基于钢缆索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详细推导,传感器输出感应电压与激励磁场变化、加载外力变化、某一激励磁场下的材料磁导率及空气间隙尺寸等有关。重点分析了激励磁场变化对传感器输出的影响,分别在激励磁场为稳恒直流磁场、交流磁场、按矩形波规律变化磁场三种情况下对传感器输出进行了讨论和仿真分析。仿真结果表明,在稳恒磁场激励下,可通过感应积分电压求缓变外力,通过感应电压求得非缓变外力。在交流激励下,激励磁场频率对传感器输出有明显影响,频率越高,由激励磁场变化所引起的感应电压幅值越大。Based on the theoretical 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 air clearance, magnetic permeability, magnetic field, stress and inductive loop denseness. The sensor output effects resulting from magnetic field are deeply analyzed when the magnetic field is constant, alternating and rectangu- lar. In addition, sensor output effects from magnetic changing have been analyzed with emulational method. The emulational results indicate that when magnetic field is constant, cable tension stress may be measured by measuring inductive voltage in inductive loops. When magnetic field is alternating, the frequency of magnetic field has influence on cable sensor output. Inductive voltage is proportional to magnetic field frequency.

关 键 词：逆磁致伸缩 传感模型 索力 激励磁场 影响因素 

分 类 号：TP212.12[自动化与计算机技术—检测技术与自动化装置]