Flow Regime Identification in Pneumatic Conveyor using Electrodynamic Transducer and Fuzzy Logic Method

Abstract

Electrodynamic sensor, which can also be called as tribo-electric sensor, senses the electrostatic charge carried by the particle. The tomography system using electrodynamic sensor is called as tribo-electric tomography system. Source of the signal induced on the electrodynamic sensor is brought by the object to be measured and no excitation circuit is necessary. Measuring concentration distribution of the solid particles is essential because it contains useful information about potential problems and further more improve efficiency in the manufacturing or chemical processes. This study proposes to use electrodynamic transducer to measure electrical charge within pneumatic pipeline and utilize the fuzzy logic technique to identify the pattern of flow regimes through pneumatic pipeline. Promising results are obtained through experimental studies.

Identyfikacja Przepływu Dwufazowego Gaz-Ciecz Oparta Na Ocenie Rozmytej Obrazów Tomograficznych 3d

“…Do tej pory, według wiedzy autorów, w celu identyfikacji struktur przepływu wykorzystywano m.in. dwuwymiarowe obrazy tomograficzne [4,17] z elementami logiki rozmytej [5,11,12], obrazy z szybkiej kamery CCD [3,16], przetwarzanie surowych pomiarów [14]. Brak jednak badań w kierunku analizy przestrzennych obrazów tomografii 3D z siatką czworościanów.…”

“…W trakcie porównywania wyników przyjęto, że obraz należy do tej klasy, dla której jego wartość przynależności jest największa. Ideą algorytmu FCM jest minimalizacja funkcji celu, podana w wyrażeniu (12):…”

Image Reconstruction Algorithm for Electrical Charge Tomography System

“…Output 2 is the rectified voltage, which can be used for spatial filtering test. Lastly, output 3 is a signal without concern for frequency called DC averaged voltage and is used for concentration measurement and flow regimes identification (Rahmat et al, 2009b). Output 3 is the signal of interest for the proposed system.…”

“…At present and in most cases, ß are chosen empirically. The value of regularization parameter of 0.025908 is obtained (Rahmat et al, 2009b). The advantage of Eq.…”

Dual Modality Tomography System Using Optical and Electrodynamic Sensors for Tomographic Imaging Solid Flow

“…The center of the electrodynamic pipe is chosen as the origin i.e. (0,0) rectangular coordinate value [13]. The coordinate is determined to calculate the contribution of each pixel to the electrodynamic sensors.…”