Advanced science.  Applied technology.


Computerized and Motorized Electromagnetic Flux Leakage Internal Diameter Tubular Inspection Device: 4,675,604


A device for detecting defects in the bore of a tubular member. The device includes an inspection head including an electromagnet for magnetizing the internal surface of a tubular member. The device also includes a sensor or sensors to detect magnetic flux leakage indicative of a defect. The magnetic flux sensor output is sent to a control-data acquisition system concurrently with signals as to the axial and circumferential position of the defect, which are obtained by their respective encoders. The control-data acquisition system is capable of processing and displaying the data in analog and digital form.

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Mark C. Moyer; William D. Perry; H. Stanley Silvus, Jr.; William C. Gibson; Felix N. Kusenberger