Abstract
Sensor is a very important part of process tomography system. Tribo-electric tomography system, it is also called electrodynamic tomography system, bases on sensing of electrostatic charges carried by particles. This sensor is passive and number of measurements is quite small comparing to other tomography system with same number of sensors. This restriction brings poor and coarse image by least square image reconstruction method for its large division of sensing zone with small number. Although back projection method is highly underdetermined, it gives better results than least square method. Other method. like iterative method or the combination of the above two, must be developed in future.
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