Development of compound inspection system for wirerope.

钢丝绳复合检测系统的开发。

• 批准号: 05650955
• 负责人: HANASAKI Koichi
• 金额: $ 1.41万
• 依托单位: KYOTO UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1993
• 资助国家: 日本
• 起止时间: 1993 至 1994
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-05650955/
• 关键词: WIRE ROPE; NONDESTRUCTIVE TESTING; MAGNETIC FLUX LEAKAGE METHOD; MAGNETIC DIPOLE; INVERSION PROBLEM; 非破壊検査

The safety and lifespan of wire rope utilized in rope ways, cable cars of lifting machine of mine, and in suspension roofing structures as tension member, are determined by the damage degree and strength of the wire ropes used. It is therefore desired to establish a method that allows accurate assessment of damage that takes place inside the wire ropes due to fatigue or corrosion. To clarify the mechanism for damage within wire ropes and to explore methods for the prevention of such damage, it is essential to accurately assess the site of damage within the cross-section of wire ropes. Using the data of magnetic flux leakage obtained from multiple points around a damaged wire rope, during saturation magnetiza tion in the longitudinal direction of the rope, an attempt has been made to prepare tomograms, which are based on the degree of damage at each point inside the rope that was obtained as the solution to an inverse problem which was solved by using a modified least square method with a restriction that the magnetic charge must not be negative. The results agree considerably with the location of de fects in the rope. Examining the influence of the direction of the magnetic flux leakage measurement on the solution obtained, it is recom-mended to use z and theta directions.

钢丝绳在矿井提升机绳道、缆车、吊顶结构中作为张拉构件使用的安全性和寿命，取决于钢丝绳的损伤程度和强度。因此，需要建立一种能够准确评估钢丝绳内部由于疲劳或腐蚀而发生的损伤的方法。为了弄清钢丝绳内部损伤的机理并探索预防这种损伤的方法，必须准确地评估钢丝绳横截面内的损伤位置。利用钢丝绳损伤周围多个点的漏磁数据，在钢丝绳纵向饱和磁化过程中，根据钢丝绳内部各点的损伤程度制作层析图像，作为反问题的解，该反问题是用改进的最小二乘法在磁荷不能为负的条件下求解的。计算结果与钢丝绳中缺陷的位置基本一致。考察了漏磁测量方向对解的影响，建议使用z方向和theta方向。

项目成果

K.HANASAKI: "Estimation of detects in a PWS rope by scanning magnetic flux leakage." NDT & E International. vol.27. (1995)

K.HANASAKI：“通过扫描漏磁来估计 PWS 绳索中的检测。”

K.HANASAKI: "Estimation of defects in a PWS rope by scanning magnetic flux leakage" NDT & E International. 27予定. (1995)

K.HANASAKI：“通过扫描漏磁来估计 PWS 绳索中的缺陷”NDT & E International 计划于 27 年。（1995 年）

K.HANASAKI,K.TSUKADA: "Computer Tomography of A Wire Rope by Magnetic Flux" Norclestructive Testing & Evaluation. 27(予定). (1994)

K.HANASAKI、K.TSUKADA：“钢丝绳磁通量计算机断层扫描”Norclestructive 测试与评估 27（计划）（1994 年）。