摘要
基于钢缆索逆磁致伸缩索力测量原理,讨论了一种旁路励磁的索力传感器。用磁导分析法对磁路做了详细的推导,结果表明可通过检测感应线圈的感应电压反映材料所受的外力,传感器输出与外力信号本身的变化、感应线圈的匝数、材料截面积、外激励磁化场及该磁场下的材料磁导率有关。在外力缓慢变化的情况下,可通过求感应积分电压得到外力。从激励磁化方式、参考工作点的选取、传感器的尺寸设计原则等3个方面做了讨论,确定了传感器的参数。最后,利用万能拉力机对该种结构的传感器做了拉力模拟实验,实验结果表明,旁路励磁的传感器测量灵敏度达到1.6mV/kN,磁路分析与参数设计比较合理,可用于钢缆索的索力测量。
A cable tension sensor with bypass excitation structure is proposed based on Villari effect principle of cable. Magnetic circuit is deeply analyzed by calculating magnetic conductance, the cable tension stress can be obtained by measuring inductive voltage in inductive loops. The sensor output may be determined by stress changing, inductive loop denseness, magnetic field and magnetic permeability. In addition,magnetization method, magnetic field intensity and sensor structure sizes are analyzed to determine the parameters of the cable sensors. Finally,a experimental system is developed, and the pulling tension experiment is carried out. The experimental result indicates that sensor sensitivity is up to 1.6 mV/kN, which shows that the magnetic circuit structure and parameter design of proposed sensor are feasible and suitable for cable tension measurement.
出处
《光学精密工程》
EI
CAS
CSCD
北大核心
2009年第3期563-569,共7页
Optics and Precision Engineering
基金
重庆市科技攻关项目(No.2008AC2009)
国家863高技术研究发展计划资助项目(No.2006AA04Z433)
