Eddy Current Inspection Training Course Syllabus

Eddy Current Inspection Training Course Syllabus - Level II

1. REVIEW OF ELECTROMAGNETIC THEORY
a Review of eddy current theory
b. Flux leakage theory
c. Types of Eddy Current sensing probes
d. Types of Flux Leakage sensing probes

2. FACTORS THAT AFFECT COIL IMPEDANCE
a. Test Part
     1. Conductivity
     2. Permeability
     3. Mass
     4. Homogeneity
b. Test System
     1. Frequency
     2. Coupling
     3. Field Strength
     4. Test coil and shape

3. SIGNAL-TO-NOISE RATIO
a. Relationship of frequency to type of test
b. Considerations affecting choice of test
c. Relationship to flux leakage testing
d. Methods of improving signal-to-noise ratio

4. SELECTION OF TEST FREQUENCY
a. Relationship of frequency to type of test
b. Considerations affecting choice of test
     1. Signal-to-noise ratio
     2. Phase discrimination
     3. Response speed
     4. Skin effect

5. COUPLING
a. "Fill factor" in through-coil inspection
b. "Lift-off" and compensation in probe coil inspection

6. FIELD STRENGTH AND ITS SELECTION
a. Permeability changes
b. Saturation
c. Effect of AC field strength on Eddy Current testing

7. INSTRUMENT DESIGN CONSIDERATIONS
a. Amplification
b. Phase detection
c. Differentiation of filtering

8. APPLICATIONS - GENERAL
a. Flaw detection - Eddy current methods
b. Sorting for properties related to conductivity - Eddy current
c. Sorting for properties related to permeability
d. Thickness evaluation - Eddy current
e. Measurement of magnetic-characteristic values

9. APPLICATIONS - AEROSPACE
Practical Application of Eddy Current Techniques
- Introduction
- Techniques
- Signal-to-noise ratio
- High frequency applications
- Sensitivity setting
- Scan Path
- Buzzer/Lamp response
- Paint removal
- Scanning around holes
- Bolt hole techniques
- Scanning in radii
- Low frequency applications
- Sensitivity setting
- Blind side corrosion
- Second layer defects
- Rotating probe applications
- Displays
- Sensitivity setting
- Locating radial position of defects

10. USER STANDARDS AND OPERATING PROCEDURES
a. Explanation of standards and specifications used in electromagnetic testing
b. Explanation of operating procedures used in electromagnetic testing

Eddy Current Training

Home ¦ Training & Consultancy ¦ Inspection ¦ Research & Development ¦ Products