Abstract – This paper presents a theoretical framework of imaging the solidification of molten metal inside a pipe by eddy currents. A complete mathematical model is developed which reveals the relationship between the solidification inside the pipe and the scattered field measurable outside the pipe. This model is then exploited to develop a numerical algorithm which is able to quickly reconst...

Aircraft Arrester Barrier Systems (AABS) are installed at the end of the runway to overcome the runway length on war ships. This system is used for the purpose of stop the combat aircraft due to aborted take-off and emergency landings. The conventional AABS is uncontrolled and highly non-linear system during the operation of aircraft arrestment system. Energy absorbing system is an important pa...

This document is intended as a brief familiarisation course for Hocking NDT’s customers and sales representatives. It is not intended as a complete theoretical course in Eddy Current Non destructive testing and a number of aspects are intentionally simplified. The bibliography at the end of the document details several appropriate reference books which should be consulted if a more complete und...

The purpose of such software development is threefold: First, the simulator serves as an analysis tool for NDE researchers to understand underlying physical processes on computers. Second, it provides a vehicle for software technology transfer to practicing NDE engineers and to component designers. Third, it can become an integral part in ( or the NDE module of) the unified life-cycle environme...

The objective of this research program is to develop microwave scattering techniques for obtaining quantitative information about the characteristic dimensions of surface cracks in metals. Work carried out during the past year has emphasized experimental techniques. The use of an IF bridge and a nearfield dielectric probe to improve the sensitivity of our 100-GHz eddy-current measurement system...

The eddy-current is created by the relative motion between a magnet and a metal (or alloy) conductor. The current induces the reverse magnetic field and results in the deceleration of motion. The proposed mechanism implements this phenomenon in developing a braking system. The potential applications of the braking system can be a decelerating system to increase the safety of an elevator or any ...

Eddy current testing is an effective way of detecting fatigue cracks and corrosion in conductive materials. The cost of using the technology is low, and the devices can monitor subsurface defects and defects under insulating coatings without touching the surface of the specimen. Although this technique is applicable for many tasks, the aircraft and nuclear power industries are the primary users...