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For Electromagnetic Tomography (EMT) Techniques, image reconstruction is one of the crucial steps, which directly affects the quality of reconstruction and real-time performance of the EMT system. Following analyzing a pre-iterative method for SIRT (simultaneous iterative reconstruction technique) algorithm, a preconditioning for the projected SIRT is proposed to accelerate the image reconstruction...
For Electromagnetic Tomography (EMT) Techniques, image reconstruction is one of the crucial steps, which directly affects the quality of reconstruction and real-time performance of the EMT system. Following analyzing a prior iteration method for SIRT (simultaneous iterative reconstruction technique) algorithm, a preconditioning for the projected SIRT is proposed to accelerate the image reconstruction...
For Electromagnetic Tomography (EMT) Techniques, image reconstruction is one of the crucial steps, which directly affects the quality of reconstruction and real-time performance of the EMT system. Following analyzing the standard Tikhonov regularization method, an improved Tikhonov method is proposed to alleviate the ill-posed characteristics of the EMT inverse problem. The new algorithm involves...
Simulations of carbon-fiber-reinforced plastics (CFRP) using the finite element method in electromagnetic tomography nondestructive evaluation systems are presented in this paper. Ansoft Maxwell 3D models describing the interaction of the sensors with both unidirectional and cross-woven plate samples are built and analyzed to show the CFRP orientations. A circular sensors array is designed and 400...
The bio-impedance measurement method via electromagnetic induction has the non-contact character which overcomes influences of the electrode's contact impedance to measurements. However its measurement results have a highly complicated relationship with impedance properties of measured objects. In order to discover the regularity, this paper deduces an analytical resolution model using a probe-coil...
An Electromagnetic Tomography (EMT) prototype system based on integrated impedance analyzer is proposed and developed in this paper. In the prototype system the excitation signal generation and measurement signal demodulation are both realized by using an integrated impedance analyzer IC controlled by an embedded microcontroller. The sensor is constructed with a parallel excitation layer, which is...
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