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    • 23. 发明授权
    • Method and apparatus for measuring the degree of cable corrosion
    • 测量电缆腐蚀程度的方法和装置
    • US06172501B2
    • 2001-01-09
    • US09474780
    • 1999-12-30
    • Kazuhiko TsukadaToshiyuki Moriya
    • Kazuhiko TsukadaToshiyuki Moriya
    • G01N2782
    • G01N17/00G01B7/12G01B7/32G01N27/82
    • A detecting coil device mounted on part of a cable to evaluate the degree of corrosion of the cable, which is used, for example, on suspension or skew bridges. The detecting coil device is provided with a detecting coil and Hall elements. A magnetizer having a magnetizing coil is mounted as to enclose the cable and the detecting coil device. When current flows through the magnetizing coil, it magnetizes the cable. The magnetic field strength is detected by the Hall element, and the amount of magnetic flux passing through the cable is detected using the detecting coil. The cross-sectional area of the cable is also calculated on the basis of the magnetic field strength and the amount of magnetic flux which are detected and the permeability of the cable. The degree at which the cross-sectional area of the cable is decreased (the corrosion degree) is evaluated by comparing the calculated cross-sectional area of the cable with the cross-sectional area of a reference cable.
    • 安装在电缆的一部分上的检测线圈装置,以评估电缆的腐蚀程度,例如用于悬挂或斜桥。 检测线圈装置设置有检测线圈和霍尔元件。 安装具有磁化线圈的磁化器以包围电缆和检测线圈装置。 当电流流过磁化线圈时,它会磁化电缆。 通过霍尔元件检测磁场强度,并使用检测线圈检测通过电缆的磁通量。 电缆的横截面面积也可以根据检测到的磁场强度和磁通量以及电缆的磁导率来计算。 通过将计算出的电缆横截面积与参考电缆的横截面积进行比较来评估电缆的横截面面积减小的程度(腐蚀程度)。