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Abstract

The paper presents the implementation of the method of own residual magnetic field to identify damages occurring in a steel rope. A special measuring head with 4 residual magnetic field sensors, spaced evenly every 90 degrees, was used. The measuring head was also equipped with a path or a time sensor. The measurement consists in recording normal and tangential components of the residual magnetic field and their gradients. This method has a number of advantages with regard to classic magnetic methods. It does not require special magnetisation of the rope or its special preparation for testing. Validation of the obtained test results of this rope was conducted by the classic MTR method and a very good compliance in the detection of damage was demonstrated. It was found that the strong magnetisation used in the MTR method does not affect the detection of damage to the rope using the residual magnetic field method.
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