PC based Eddy Current non-destructive testing (NDT) system

Abstract

A cost effective PC based Eddy Current Testing System is designed and developed to detect surface cracks in nonmagnetic metals. The developed system is composed of Constant Current AC Source for excitation of the probe; and demodulation circuitry for acquisition of the signal from the crack. Eddy Current Testing Probe is also designed using the Analytical Approach. Surface cracks were successfully detected through developed system. The flaw signal is also plotted in real time on PC. Data logging feature and position sensing is also incorporated.

Review on system development in eddy current testing and technique for defect classification and characterization

“…The feedback of output signal will be shown following the applied input signals. [12] An air-core or ferrite-core coil as EC probe [13] Develop circuitry to measurement and functioned a particular type of probe [14] The PWM carrier eddy current for estimation of magnet [15] Multifrequency mode for triple-coil sensor in lift-off detection [16] System by using artificial neural network [17] Simulations for the threedimensional finite element [18] Topological shape optimisation [19] Simplex-mesh refinement is proposed for creating a forward database [20] Lorentz force ECT [21] Pulsed eddy current signal in inspection technique [22] Probe development of the detection system [23] Feeding devices which are used in the eddy current detection of titanium alloy tube [24] An induction motor 's loading being controlled by ECB [25] Lorentz force ECT [21] Image processing with 2D defect profile reconstruction technique [26] Enables the detection of defects lying and deep inside a conducting material with computation 3D with Lorentz force technique in ECT [27] Swarm algorithm is performed wherein the exact forward computations [28] Characterisation of defects on rivets [29] Non-invasive inspection of large conductive structures [30] Constant current AC source for excitation of the probe [31] Type sensor is introduced based on the eddy current principle [32] Filtrate the suspension of multi-walled carbon nanotubes CNTs [33] The braking torque and force analysis in eddy current using axial flux permanent magnet-type [34] Effectively eliminate the distance effects between the surface of the coil [35] Modelling of the measured response in feature extraction for non-linear regressions for [36] Simulated of threedimensional diagnosis of real cracks from two dimensional [37] Imperialist competitive algorithm in solve the problem of natural crack shape reconstruction [38] Characterisation of the crack depth [39] The numerical solution in...…”

“… Peak factor hardware flowchart and schematic diagram withoutput waveform (a) The peak factor values versus the multi‐sine signal's tones[59], (b) Hardware flowchart [31], (c) Phase shift oscillator schematic[31], (d) Phase shift oscillator outputwaveform [31]…”