MFL Inspection Sensor for Metallic Cables
Physical Principle Technology
The MFL inspection sensor for metallic cables uses the saturating magnetization principle. When a cable or ferromagnetic material is exposed to a strong magnetic field and has discontinuities such as cracks, wire breaks, or corrosion, magnetic flux leakage fields are generated and detected by high-sensitivity Hall sensors. This technology ensures precise defect detection even under extreme operating conditions and surface coatings.
Sensor Architecture
- Permanent Magnet: NdFeB alloy generating a magnetic field of 0.8-1.5 Tesla.
- Hall Sensors: Matrix arrangement with 4-8 sensors/cm² for maximum resolution.
- Magnetic Yoke: Silicon steel core efficiently channels the magnetic flux.
- Integrated Electronics: Signal conditioning circuit with 100 kHz sampling for fast and accurate detection.
Technical Parameters
- Spatial Resolution: ±1 mm longitudinally
- Penetration Depth: Up to 12 mm in steel
- Inspection Speed: 0.1-2.0 m/s
- Detection Range:
- Wire breaks: >1 strand
- Cross-section loss: >3%
- Pitting depth: >0.5 mm
Specialized Configurations
- Yoke-Type Sensor: For 10-50 mm Ø cables
- Permanent Sensor: Ideal for moving applications
- Multiaxial Array: 3D defect detection
Industrial Applications
- Offshore: Cable inspection on oil platforms
- Mining: Hoist and transport cables
- Infrastructure: Bridges, cable cars, and transport systems
- Energy: Wind crane cables and power generation systems
Competitive Advantages
- Real-time inspection
- Zero physical contact with the cable
- Tolerance to surface coatings
- Operation in harsh and extreme environments
- High component reliability and durability
- Optimized predictive maintenance and industrial safety
The MFL inspection sensor is the most reliable technology for non-destructive evaluation of active metallic cables, offering precision, efficiency, and safety in critical industrial operations.
