基于弹性形变的拉索索力测量系统
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摘要
结合位移传感器,提出了基于弹性形变的拉索索力测量装置和方法,介绍了系统的结构和原理,通过标定、加载试验和滤波获得拉索索力数据和与之对应的拉索形变量数据。最后,经过数据拟合分析得出拉索形变量与拉索索力值的线性关系,并加以验证。当索力测量范围为5~20 k N,测量频率为1 Hz时,最大测量误差将可控制在10%以内,平均测量误差约5%,且随着待测索力的增大,测量精度随之升高。
Combining with displacement sensor,measuring device and method of cable force based on elastic deformation is proposed; introduce structure and principle of the system; and then obtain datas of cable force and cable variable which are corresponding to cable force datas through calibration,loading experinment and filtering;finally,through data fitting analysis,obtain linear relationship between cable shaped variables and values of the cable force,at the same time,it is validated. When cable force measurement range of 5 ~ 20 k N and measurement frequency is 1 Hz,the maximum measurement error will be controlled within 10 %,average error of measurement is about 5 %,and with increasing of cable force measurement under test,measurement precision is increased.
Combining with displacement sensor,measuring device and method of cable force based on elastic deformation is proposed; introduce structure and principle of the system; and then obtain datas of cable force and cable variable which are corresponding to cable force datas through calibration,loading experinment and filtering;finally,through data fitting analysis,obtain linear relationship between cable shaped variables and values of the cable force,at the same time,it is validated. When cable force measurement range of 5 ~ 20 k N and measurement frequency is 1 Hz,the maximum measurement error will be controlled within 10 %,average error of measurement is about 5 %,and with increasing of cable force measurement under test,measurement precision is increased.
引文
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[2]Sumitro S,Okada Y,Saitoh K.Long-gage optical fiber sensors monitoring on deteriorated structure deformational properties[C]∥Proc of First International Conference on Structural Health Monitoring and Intelligent Infrastructure,Tokyo,2003:1277-1285.
[3]Ren Weixin,Peng Xuelin,Lin Youqin.Experimental and analytical studies on dynamic characteristics of a large span cable-stayed bridge[J].Engineering Structures,2005(27):535-548.
[4]He Youquan.The application research of computer vision in bridge health monitoring[J].Journal of Communication and Computer,2010,7(2):6-8.
[5]荣立.浅谈钢丝绳无损检测技术[J].中国科技信息,2005(21):100.
[6]Zhou Qian,Tao Dexin,Jin Chaoqiu.Analysis on signal feature of magnetism leaking of wires broken in a steel wire rope[J].Port Operation,2004(2):6-8.
[7]姜建山,唐德东,周建庭.桥梁索力测量方法与发展趋势[J].重庆交通大学学报:自然科学版,2008,27(3):379-382.
[8]Su Dagen.Analysis of corrosion and failure of bridge diagonal tie rods[J].Materiais Protextion,1997,30(12):24-26.
[9]郭良友,林一宁,李文波,等.武汉长江二桥的索力、温度和应力测量[J].桥梁建设,1995(3):44-46.
[10]李红杰,苗顺占,傅华明.基于振弦式传感器的桥梁检测系统设计[J].传感器与微系统,2011,30(6):93-95.
[11]吴康雄,刘克明,杨金喜.基于频率法的索力测量系统[J].中国公路学报,2006,19(2):62-66.
[12]褚建新,顾伟.钢丝绳缺陷漏磁场的磁通门检测法[J].仪器仪表学报,1997,18(4):437-440.
[13]曹建秋,蓝章礼,周建庭.一种大型建筑物拉杆拉力测量装置:中国,ZL201010042020[P].2010—01—07.