To solve the “soft-field” nature and the ill-posed problem in electrical capacitance tomography technology
on the basis of the singular value decomposition theory of the sensitivity matrix
a SVD truncation conjugate gradient weighted image reconstruction algorithm for electrical capacitance tomography system is presented
a mathematic model for this algorithm is established and its convergence characteristic is proved
and this method is applied to the image reconstruction for electrical capacitance tomography system. Experiment results and simulation data indicate that the precision of the reconstructed image is higher
the speed is faster and it is easier to implement compared with LBP algorithm and CG algorithm.