A Novel Circuit for Measuring Oil-water Two-phase Flows Using Electrical Capacitance Tomography system

Electrical capacitance tomography is the main trend of technology, in which how to measure the low value capacitance is the key issue of implementation. For this purpose, a novel measurement circuit for electrical capacitance tomography system is presented in this paper. Experiments indicate that static error is less than 0.2% for capacitance measurement with 0.05% of drift per hour. Experimental results verify the performance of this circuit quite satisfactory