Method of Improving Reconstructed Image of Electrical Capacitance Tomography

摘要

The sensing field sensitivity distributions of sensor of electrical capacitance tomography system, and the relationship between the position of detected object in sensing field and the capacitance measurements are described in the paper. The discovery is that the positive and negative sensitivity informations of the sensing field is not processed completely in existing image reconstruction algorithm, which causes some sensitivity informations lost and image fidelity being low. The modified algorithm is proposed. The new method can provide complete sensitivity information during image reconstructed. The results of computer simulation and experiment showed a great improvement on image fidelity.