Patent ID: 11906460
Assignee: ZHEJIANG UNIVERSITY
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 8:
9. A capacitance measurement method for an electrical capacitance volume tomography device for a cryogenic fluid flowing in a Venturi tube according to claim 1, comprising:
keeping the metal shell grounded, and introducing a pre-cooled gaseous working medium to precool the device to prevent brittle fracture caused by quenching;
during operation, firstly, using a voltage U to excite one of the electrode plates, keeping the other electrode plates at zero potential, and measuring a capacitance between the excited electrode plate and other electrode plate pairs, respectively, then using the voltage U to excite another electrode plate, measuring the capacitance between the exited electrode plate and other electrode plates at zero potential, and so on, until the capacitance measurement between all electrode plates is completed, wherein the capacitance between the combinations of every two electrode plates is measured non-repeatedly, and the recorded capacitances are used for subsequent inversion imaging.