摘要：ERT(electrical resistance tomography) is effective method for visualization of multiphase flows,offering some advantages of rapid response and low cost,so as to explore the transient *** at this target,a fully programmable and reconfigurable FPGA(field programmable gate array)-based Compact PCI(peripheral component interconnect) bus linked sixteen-channel ERT system has been *** data acquisition system is carefully designed with function modules of signal generator module;Compact PCI transmission module and data processing module(including data sampling,filtering and demodulating).The processing module incorporates a powerful FPGA with Compact PCI bus for communication,and the measurement process management is conducted in *** reconstruction algorithms with different speed and accuracy are also coded for this *** system has been demonstrated in real time(1400 frames per second for 50 kHz excitation) with signal-noise-ratio above 62 dB and repeatability error below 0.7%.Static experiments have been conducted and the images manifested good resolution relative to the actual object *** parallel ERT system has provided alternative experimental platform for the multiphase flow measurements by the dynamic experiments in terms of concentration and velocity.

摘要：A digital filtering method is presented to compensate the dynamic characteristics of measuring *** compensation filter has an infinite impulse response property and is designed by system identification approach from the known input output pairs of the measuring *** of this method to eliminating the distortions of measured waveform in transient pulse measurement are *** results show that the measurement errors caused by the sensor are reduced to be very small after the use of the compensation filter.