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.
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references
WANG M L,CHEN Z. Magneto-elastic permeability measurement for stress monitoring in steel tendons and cables . Proc.of the SPIE 7th Annual Symposium on Smart Structures and Materials, Health Monitoring of the Highway Transportation Infrastructure,2000,3995:492-500.[2] SUMITRO S,JAROSEVIC A,WANG M L. Elasto-Magnetic Sensor Utilization on Steel Cable Stress Measurement .The First fib Congress, Concrete Structures in the 21th Century, Osaka, 2002, Session 15:79-86. [3] 唐德东,黄尚廉,陈伟民,等. 基于磁弹效应的钢缆索索力测量中励磁磁路研究[J]. 仪器仪表学报,2006,27(12):1695-1699. TANG D D,HUANG SH L,CHEN W M,et al.. Study on the magnetic excitation circuit for measuring the cable tension based on magneto-elastic effect in steel cable [J].Chinese Journal of Scientific Instrument,2006,27(12):1695-1699. (in Chinese)[4] 唐德东,黄尚廉,姜建山,等. 基于磁弹效应的温度补偿型单旁路励磁索力传感器研究[J]. 传感技术学报,2007,20(6):1240-1244. TANG D D,HUANG SH L,JIANG J SH, et al.. Study on cable tension sensor with temperature compensation by single bypass excitation based on magneto-elastic effect [J].Chinese Journal of Sensors and Actuators,2007,20(6): 1240-1244. (in Chinese)[5] 唐德东,黄尚廉,陈伟民,等. 旁路励磁的磁弹性传感器研究[J]. 仪器仪表学报,2007,28(7):1159-1161. TANG D D,HUANG SH L,CHEN W M,et al.. Research on cable tension sensor based on magneto-elastic effect with bypass excitation[J].Chinese Journal of Scientific Instrument,2007,28(7):1159-1161. (in Chinese)[6] 钟文定,铁磁学(中册)[M]. 北京:科学出版社,1987. ZHONG W D.Ferromagnetic Subject[M].Beijing:Press of Science 1987.(in Chinese)[7] 杨大智. 智能材料与智能系统[M]. 天津:天津大学出版社,2001. YANG D ZH. Smart Materials and Smart System [M]. Tianjin: Tianjin University Press, 2001. (in Chinese)[8] 姜建山,黄尚廉,陈伟民,等. 基于磁弹效应的索力传感器原理与实验研究[J]. 现代科学仪器,2008,4(2):10-13. JIANG J SH,HUANG SH L,CHEN W M,et al.. Principle and experiment research of magnetic-elastic stress sensor based on magneto-elastic effect[J].Modern Scientific Instruments,2008,4(2):10-13.(in Chinese)