A dual sensor flow imaging tomographic system

Abstract

A dual sensor tomograph for three-component flow imaging has been built at the University of Bergen in cooperation with Christian Michelsen Research AS and Norsk Hydro AS. It utilizes an eight-electrode electrical capacitance tomograph and a γ-ray tomograph with five radiation sources and 85 compact detectors. Embedded transputers using memory-mapped I/O ensure high-speed data acquisition into an Alpha AXP-based on-line processing unit. The first results demonstrate that three-component flow regime identification is possible at rates of about 30 frames per second, provided that sufficient computing capability is available.

Simulation of Image Fusion of Dual Modality (Electrical Capacitance and Optical Tomography) in Solid/Gas Flow

“…A hard-field system, such as optical tomography, is equally sensitive to the parameter it measures in all positions throughout the measurement volume [4]. Soft-field Table 1 The advantages and limitations of tomography modalities in solid/gas flow measurement…”

“…Limited measurement in high distribution flows above 35% [2] Gamma ray Spatial resolution 1% [3,4] Require relatively long time for energy integration, mechanical movement to obtain of the whole region [4,6], radiation dose to the surrounding [3,4], heavy shielding [4] Dual mode; electrical capacitance and gamma…”

“…High spatial and temporal resolution image [3,4] Radiation dose to the surrounding [3,4], heavy shielding [4], high cost sensors, such as the capacitance tomograph, however, measure parameters that change depending on the position in the measurement volume. In a dual mode system that uses both soft and hard field sensors, the different sensors often provide complementary process information that can improve the measurement results [4].…”

“…In a dual mode system that uses both soft and hard field sensors, the different sensors often provide complementary process information that can improve the measurement results [4].…”

Comparison Between Two Different Types of Microcontroller in Developing Optical Tomography Controller Unit

“…water in bubble column) [2]. Indeed, there are several other tomography techniques available but optical tomography is considered safest technique since this sensors is equally sensitive to parameter measured in all position throughout the measurement volume and its sensitivity is independent on the distribution inside and outside measurement region [3].…”