Characterization of Particle Mass Flow Rate of Gas–Solid Two-Phase Flow by the Combination of Transferred and Induced Current Signals

To characterize the particle mass flow rate of gas–solid two-phase flow, a model of particle mass flow rate based on the comprehensive application of transferred current and induced current signals from an electrostatic sensor is proposed in this article. Compared with the characterization model of the particle mass flow rate using the transferred current signal or induced current signal separately, the proposed model can make full use of the characteristics of the two signals. The induced and transferred current signals are extracted from the electrostatic sensor based on the time-domain waveform characteristic method and the direct integration function method, respectively. According to the sensitivity of the time-domain characteristics of the transferred current signal (the radial motion of particles) and the macroscopic stability of the frequency-domain characteristics of the induced current signal (the axial motion of particles), the new signal characteristic value based on the two signals is used to establish a comprehensive signal characterization model (CSCM) of the particle mass flow rate. The coefficients in the model are fit using the Levenberg–Marquardt (LM) method. The experimental results show that the proposed model has higher accuracy and stability than the separate signal model under the experimental conditions in this article.