Results 291 to 300 of about 137,248 (332)

Nondestructive Eddy Current Testing

IEEE Transactions on Instrumentation and Measurement, 1972
When a coil is placed in proximity to a conductor, the magnetic field in the vicinity of the coil is altered by eddy currents in the conductor. The conductivity of a sample material may be determined by measuring the field. Closed-form solutions are presented for the magnetic field at the surface of a semi-infinite conductor for two cases: a semi ...
Alan L. Jones, Karl F. Pezdirtz
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Polyphase eddy current testing

Journal of Applied Physics, 1994
Polyphase eddy current testing is proposed. The operating principle of this system is as follows. The polyphase eddy current testing system may be regarded as one of the polyphase transformers. Primary balanced polyphase coils are star connected and secondary polyphase circuits are composed of the target.
I. Marinova, S. Hayano, N. Ishida, Y. Saito, Y. Hirama, M. Yamamoto   +5 more
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Eddy Current Testing

Aircraft Engineering and Aerospace Technology, 1986
Eddy current testing is a general term for the inspection of conductive materials using an induced electro‐magnetic field. The flow of this field is affected by the presence of defects within the material and the charges are detected by suitable instruments which reveal their location and nature.
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Eddy current testing instruments

Physics Bulletin, 1988
Eddy current testing is a means of nondestructively testing electrically conducting materials and is most widely used for production and in-service testing of high integrity components and structures such as nuclear reactor tubing and airframe fastener joints.
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Electrical Test Methods (Eddy Current Testing)

1988
The basic principle underlying the electrical test methods is that electrical eddy currents and/or magnetic effects are induced within the material or component under test and, from an assessment of the effects, deductions can be made about the nature and condition of the testpiece.
Barry Hull, Vernon John
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Massively Multiplexed Eddy Current Testing and its Comparison with Pulsed Eddy Current Testing

AIP Conference Proceedings, 2004
This compares the capabilities of the Pulsed Eddy Current technique with those of an Eddy Current instrument capable of multiplexing through 32 discrete frequencies. Pulsed Eddy Current testing has shown some definite advantages due to the application of an extended series of frequencies to a test piece and analysis using a time‐based display. The Eddy
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Electromagnetic (Eddy Current) Testing

1992
This paper will cover the electromagnetic (eddy current) testing method and ASTM Subcommittee E7.07 on Electromagnetic Method and its activities. The basic principles and applications of the test method are discussed. The advantages and disadvantages are noted.
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Optimized complex signals for Eddy Current Testing

2014 IEEE International Instrumentation and Measurement Technology Conference (I2MTC) Proceedings, 2014
The choice of optimized excitation devices and strategies is now interesting recent studies about Non Destructive Eddy Current Testing (ND-ECT). Recently, the attention has been paid to the use of complex excitation signals, meant as signals different from the sinusoidal ones and with wide frequency content. In particular, some studies have highlighted
Betta G., Ferrigno L., Laracca M., Burrascano P., Ricci M.   +4 more
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Eddy current testing of metals

Materials & Design, 1987
Abstract Eddy currents can be used for testing metals for changes in composition, structure and hardness, and for detecting and measuring surface and sub-surface defects. They can also be applied to measuring changes in dimensions of rods and tubes and of thickness of metal plates and of non-metallic coatings on metal substrates and of metal coatings
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Low-Frequency Eddy Current Testing

2016
Eddy current testing is a nondestructive testing method based on electromagnetic induction principle. The metal conductor is placed in an alternating magnetic field, and the eddy current will be induced. Hughes used the induced current method to detect the different metals and alloys, explained the feasibility of using the eddy current to detect ...
Songling Huang, Shen Wang
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