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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Atzlesberger, J. Zagar, B.G. |
| Copyright Year | 2012 |
| Description | Author affiliation: Institute for Measurement Technology, Johannes Kepler University, 4040 Linz, Austria (Atzlesberger, J.; Zagar, B.G.) |
| Abstract | This paper describes an effective non-destructive measurement system for the visualization of magnetic anomalies in magnetizable objects. For the realization of the system highly sensitive sensors based on the GMR effect (GMR = giant magneto resistance) are used. The developed sensing head can be mounted easily on a positioning unit and measure the magnetic flux density or its gradient using an ADC (analog digital converter) which measures the sensor output voltage and a microcontroller for signal processing. After data transfer via USB to a PC the measurement results can be visualized and further signal processing steps (e.g. error pattern recognition algorithms) can be applied. This probe is suitable especially for magnetic non-destructive testing (NDT) systems with high inspection speeds and can work with different types of GMR-sensors (magnetometer, gradiometer) exhibiting several sensitivities. For observing ferromagnetic objects either the object's magnetization due to the earth's magnetic field is large enough for a meaningful measurement result or the object has to be magnetized actively during the measuring process by a magnet. For adjusting the magnetic excitation easily electro magnets are preferred. Exemplary measurement results obtained by the sensing head implemented in an MFL (magnetic flux leakage) testing system are presented. |
| Starting Page | 2045 |
| Ending Page | 2050 |
| File Size | 1766567 |
| Page Count | 6 |
| File Format | |
| ISBN | 9781457717734 |
| ISSN | 10915281 |
| e-ISBN | 9781457717727 |
| DOI | 10.1109/I2MTC.2012.6229236 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2012-05-13 |
| Publisher Place | Austria |
| Access Restriction | Subscribed |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Magnetometers Magnetic resonance imaging Magnetic flux leakage Magnetomechanical effects Magnetic sensors Superconducting magnets Magnetic Anomaly Detection (MAD) Magnetic Flux Leakage (MFL) Giant Magneto Resistor (GMR) Non-Destructive Testing (NDT) Non-Destructive Evaluation (NDE) |
| Content Type | Text |
| Resource Type | Article |
| Subject | Instrumentation Electrical and Electronic Engineering |
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