Measurement Of Voidage Of The Gas-Solid Fluidization System

摘要

Based on ECT technique, a 12-electerode instrument system for the measurement of voidage of the gas-solid fluidization system has been developed. The ART algorithm is used as the image reconstruction algorithm in this measurement system. Furthermore, the image grey level constrain and a filter based on the average pixel grey level are introduced to improve the accuracy of the system and the quality of reconstructed image. The experimental results show that the reconstructed images are consistent with the actual voidage distribution and the voidage measurement error is less than 5%.