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Accession Number:
ADA142012
Title:
Electromagnetic Inspection of Wire Ropes Using Sensor Arrays.
Descriptive Note:
Quarterly progress rept. 16 Dec 83-15 Mar 84,
Corporate Author:
NDT TECHNOLOGIES INC SOUTH WINDSOR CT
Report Date:
1984-04-25
Pagination or Media Count:
7.0
Abstract:
During the time period from 16 December 1983 thru 15 March 1984 we achieved the following We performed an experimental investigation of the magnetic flux patterns in the magnetizer-sensor arrangement and in the wire rope. This investigation led to a better understanding of the previously mentioned echo effect. We investigated a number of different magnetizer-sensor configurations using split-pole arrangements and various pole pieces with different geometries. At the present time, it appears that the use of longer and narrower pole pieces and elongated magnet geometries significantly reduce the previously mentioned remagnetization effect. We modified our coil simulation program to include the interaction of coils and magnetizer for our new loss-of-metallic-area instruments. The simulated results are in excellent agreement with the above mentioned experimental results. The simulation program now allows an accurate prediction of the instrument performance. Unfortunately, the simulation will not predict the signal-to-noise ratio at the present time.
Distribution Statement:
APPROVED FOR PUBLIC RELEASE
