简述了钢丝绳无损检测的几种磁化方式，介绍了磁桥路检测法的原理，并结合理论计算和试验得出了钢丝绳截面积变化检测励磁器的结构尺寸。
Summarizes several magnetization methods of detecting steel wires, introduces the theory of magnetic bridge, and gains the structure size of the excitation device through calculating and experiment.
特别是对于短期变化(如防洪区)较大、面积较大而复杂的研究区来说，这一方法的应用弥补了单一分类方法的不足。
Especially, accuracy of modified classification is largely improved for those regions of short term "s change, such as flood control district, and for much bigger and complicate study area."
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