钢缆索放置式磁弹索力传感器设计与试验研究  

The Design of the Placed Magneto-elastic Cable Force Sensor and the Stress Test of the Steel Cable

作　　者：张琦 ZHANG Qi(The Inspection&Research Institute of Boiler&Pressure Vessel of Jiangxi Province,Nanchang 330029,China)

机构地区：[1]江西省锅炉压力容器检验检测研究院,南昌330029

出　　处：《南昌航空大学学报（自然科学版）》2020年第4期66-72,共7页Journal of Nanchang Hangkong University(Natural Sciences)

基　　金：国家市场监督管理总局科技计划项目(2019MK152)。

摘　　要：钢缆索具有柔性大且强度高等特点,广泛应用于大型建筑结构、牵引机械设备及大跨度桥梁工程。钢缆索索力的状态是衡量钢缆索结构健康状态的重要标志,因此必须对钢缆索索力状态进监测。本文搭建了磁弹索力测量系统,针对现有套筒式和旁路式磁弹传感器安装复杂、测量误差大以及磁化不均匀等问题,研制了放置式磁弹索力测量传感器,并对15 mm直径钢缆索开展了不同励磁方式下的放置式磁弹传感器钢缆索索力测量试验研究。试验结果表明:不论采用哪种励磁方式,放置式磁弹传感器都具有较高的线性度,在相同试验条件下,半包络式励磁方式有着更好的磁化效果,其灵敏度更高为单旁路式励磁方式的1.74倍,可达0.061 mV/kN。Steel cables have the characteristics of large flexibility and high strength,which is widely used in large-scale building structures,traction machinery and large-span bridge projects.The state of the cable force is an important symbol to measure the health state of the steel cable structure,so the state of the cable force must be monitored.In this paper,a magneto-elastic cable force measurement system was built,and a new type of magneto-elastic cable force measurement sensor was developed to solve the problems of complicated installation,large measurement errors,and uneven magnetization of existing sleeve and bypass magneto elastic sensors.Taking the galvanized steel cable with a diameter of 15 mm as the research object,the test study on the measurement of the cable force of the placed magneto-elastic sensor under different excitation modes had been carried out.The test results show that:no matter which excitation method is used,the placed magneto-elastic sensor has higher linearity,under the same test conditions,the semi-envelope excitation method has a better magnetization effect,and its sensitivity is 1.74 times higher than that of the single bypass excitation method,reaching 0.061 mV/kN.

关 键 词：索力 钢缆索 放置式磁弹传感器 磁弹效应 

分 类 号：TH878[机械工程—仪器科学与技术]