Adaptive calibration of a capacitance tomography system for imaging water droplet distribution

Estimation of gas void formation in statically cooled waxy crude oil using online capacitance measurement

“…This calibration method describes the two extreme points of the measurement range for the ECT system (Yang et al, 2004). Once the ECT system was calibrated, then it was ready to capture an online measurement.…”

“…This was carried out using the reference data in the calibration file which was generated during the calibration process. The normalized capacitance (C n ) was computed using (6) (Yang et al, 2004):…”

Co-operative sensor fusion using time warping in multimodal tomometry for process control

“…So, in practice, most of the dynamic flow visualizations, simple linear back projection technique is used to construct the tomograms (Niedostatkiewicz et al 2009). Some algorithms have been developed to have calibrations while in operation to have improved measurements (Yang et al 2004). Possible image fusions algorithms for dual plane tomography systems can be found in (Sankowski et al 2006).…”

Study of Void Fraction Measurement in a Two Phase Flow by Using Differential Pressure and Electrical Capacitance Tomography

“…In this case, the sensor is first measured empty i.e. using air having the permittivity equals to one and also it gives the value of lower capacitance C l , and then it is completely filled with deionized water having the higher permittivity equals to 80 that will gives the values for higher capacitance C h. All subsequent measured capacitance values C m are then normalized to have values C n between "0" (when the sensor is fully filled with lower permittivity material) and "1" (when the sensor is fully filled with higher permittivity material) as shown in the following formula (1) [8]:…”