基于PCB线圈的钢丝绳金属横截面积损失检测方法

A LMA Detection Method Based on PCB Coil for Wire Ropes

钢丝绳金属横截面积损失(Loss of Metallic area)直接影响钢丝绳承载强度等特性,因此其检测及定量分析对于设备安全可靠运行具有重要意义。针对目前主磁通检测中存在的线圈绕制困难、参数确定模糊等问题,基于仿真模型提出一种基于印制电路板(Printed Circuit Board)的分体式线圈结构,分析了线圈匝数、线圈层数、线距等参数对检测信号的影响;建立主磁通检测模型,探究损伤宽度对主磁通检测信号的影响规律,并针对损伤宽度变化造成的信号损失设计补偿方法;最后通过钢丝实验验证金属横截面积定量检测效果,表明该方法定量误差在1%以内,能够有效检测钢丝绳的LMA。

The Loss of Metallic Area(LMA)directly affects the bearing strength and other characteristics of the steel wire rope,therefore its detection and quantitative analysis are of great significance for the safe and reliable operation of the equipment.Aiming at the problems of difficult coil winding and fuzzy parameter determination in the current main magnetic flux detection,a split coil structure based on Printed Circuit Boards(PCB)is proposed based on the simulation model.The number of coils turns,coil layers,and other parameters in the design process are analyzed for their effect on the detection signal.Meanwhile,the main magnetic flux detection model is established to explore the influence of the defect width on the inductive voltage signal,and a compensation method is proposed for the signal loss caused by the reduction of the damage width.Finally,the steel wire bundle is used as an example to verify the quantitative detection of LMA.Experiment results show that the quantitative error of the proposed method is within 1%,and it can effectively detect the LMA of steel wire rope.