微型磁通量传感器平行钢丝智能拉索试验与温度补偿  

Parallel Steel Wire Intelligent Cable Test and Temperature Compensation of the Micro Magnetic Flux Sensor

作　　者：宋宏水 SONG Hongshui(China Railway 15th Bureau Group 3rd Engineering Co.Ltd.,Chengdu Sichuan 641419,China)

机构地区：[1]中铁十五局集团第三工程有限公司,四川成都641419

出　　处：《铁道建筑技术》2025年第4期96-100,共5页Railway Construction Technology

基　　金：中铁十五局集团有限公司科技研发计划项目(2023-B12)。

摘　　要：磁通量传感器广泛用于测量拉索的索力。传统磁通量传感器尺寸较大,用于测量整体钢丝拉索索力,但无法测量单根钢丝的索力,导致无法确定拉索钢丝受力均匀性等问题。开发一种既可用于单根钢丝检测,又可监测拉索整体索力的内径8 mm微型磁通量传感器,并通过开展一系列试验,提出微型磁通量传感器的电压积分值与力值关系,同时采用三次曲线拟合索力,以提高拟合精度。此外,针对在某一力值的磁通量传感器测量数据,电压积分值与温度拟合直线公式,该斜率即为温度补偿系数,补偿和标准力值最大满量误差为1.1%。基于CCT8微型磁通量传感器的7-55型1770 MPa钢丝冷铸锚具拉索性能试验,结果表明,校准力值与标准力值的满量最大误差为0.1%,具有较高的精准度及可靠性,适宜于施工和养护阶段快速索力监测。Magnetic flux sensors are widely used for measuring the cable tension of stay cables.Traditional magnetic flux sensors,with their large dimensions,are designed for monitoring the overall tension of steel wire cables but fail to measure the tension of individual steel wires,leading to challenges in assessing the uniformity of stress distribution among wires.This paper presents the development of a miniature magnetic flux sensor with an 8 mm internal diameter,which enables both single-wire detection and integrated cable tension monitoring.Through a series of experiments,a relationship between the voltage integral value of the miniature magnetic flux sensor and the applied force was established,and the tension calibration accuracy was improved using third-order curve fitting.Additionally,a linear fitting formula between voltage integral values and temperature was proposed for sensor measurements under specific force conditions,with the slope serving as the temperature compensation coefficient.The maximum full-scale error after temperature compensation was reduced to 1.1%compared to standard force values.Performance tests on the Type 7-551770 MPa steel wire cables with cold-cast anchorages using the CCT8 miniature magnetic flux sensor demonstrated a maximum full-scale error of 0.1%between calibrated and standard force values,confirming its high accuracy and reliability.This sensor is suitable for rapid cable tension monitoring during both construction and maintenance phases.

关 键 词：平行钢丝智能拉索 磁通量传感器 索力 电压积分值 温敏特性 

分 类 号：TP212.1[自动化与计算机技术—检测技术与自动化装置]