钢缆索索力磁性传感理论模型与实验研究 -学兔兔 www.xuetutu.com.pdf

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第31卷第4期
仪器仪表学报
2010年4月
Chinese Journal of Scientific Instrument
Apr.2010
钢缆索索力磁性传感理论模型与实验研究
陈伟民,姜建山2,章鹏,刘琳,刘小亮
(1重庆大学光电技术及系统教育部重点实验室重庆
2重庆交通大学信息科学与工程学院重庆400074)
摘要:基于逆磁致伸缩效应,建立钢缆索的索力传感理论模型,深入讨论了施加在缆索材料上的力信号(外力和应变)与磁信
号(磁感应强度、磁场强度)之间的相互耦合关系。通过对缆素材料磁导率进行泰勒级数展开,得到磁感应强度,加载外力与激
励磁场之间的关系。在此基础上,分析了当分别采取稳恒磁场激励和交流磁场激励下,磁感应强度随加载外力的变化情况,并
做了仿真。结果表明:不论是稳恒磁场激励,还是交流磁场激励,磁感应强度都随加载外力的增大而变大。针对所设计的环式
索力传感器,完成了索力测量原理推导,通过输出感应积分电压可求得索力,并且在只考虑一阶泰勒展开系数时,输出积分电压
与素力成线性关系。最后搭建实验系统,通过万能拉力机完成了传感器的外力加载实验。结果表明:传感器灵敏度能达到
69mV/kN,最大重复性误差为0.286%,也表明所建立的理论模型是合理的。
关键词:逆磁致伸缩效应;传感模型;磁感应强度;缆索索力;索拉力实验
中留分类号:TP212.12TH701文献标识码:A国家标准学科分类代码:460.4030
Modeling and experiment of cable tension magneto-sensor
Chen Weimin, Jiang Jianshan", Zhang Peng,Liu Lin, Liu Xiaoliang
(I Key Lab. for Opto-electronic echnology &ystem, cation Ministry of China, Chongqing Uninersity, Chnging 400044, China
2 School of Information Science and Engineering, Chongging Jiaotong University, Chongqing 400074, China)
Abstract: Based on villari-effect, the theoretic model of cable tension sensor is presented. The relationship between
mechanical parameters such as force, strain and electromagnetic parameters like magnetic field and magnetic induc-
ton fle
eld
are dee
ply discussed. The magnetic permeability is approached by Taylor series progression, and the rela
tionship between magnetic induction field, magnetic field and cable tension stress is deduced. In addition, the rela
tionship between magnetic induction field and cable tension can be studied and analyzed by theoretic and simulation
methods when magnetic field is constant or sinusoidal. The results show that the magnetic induction field is also in
creasing accordingly when cable tension stress is increasing. Aiming at the designed cable tension sensor with sleeve
the cable tension measurement principle is also deduced. Finally, a cable tension stress sensor experimental system
is designed and cable tension force experiment based on cable tensile sensor is completed. Experimental results show
hat the sensor output sensitivity is up to 1. 69 m/KN and the maximum repeatability error is O286%. They also
show the feasibility of the sensor theory model
Key words: Villari-effect; sensing model; magnetic induction field; cable tension; cable tension force experiment
收稿日期:2009-05 Received Date:2009-05
*基金项目:国家863计划(2006AO4Z433)、重庆市科技攻关项目(CSTC2008AC2009)资助项日