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首页> 外文会议>International Conference on Quality in Research >Portable gamma ray tomography system for investigation of geothermal power plant pipe scaling
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Portable gamma ray tomography system for investigation of geothermal power plant pipe scaling

机译：地热电厂管道缩放调查的便携式伽马光线断层扫描系统

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A portable gamma ray tomography system has been designed to investigate geothermal power plant pipe scaling. Furthermore, the system could be applied to diagnose industrial processes unit such as pipeline, heat exchanger, and so on. The system consists of mechanical parts, computerized controlled module, a gamma ray source (80 mCi of Cs-137), a scintillation detector NaI(Tl), data acquisition and computer. The mechanical part was designed to meet the portability standard of industrial processes unit such as dimension, position, material type, etc. The investigated object is scanned an in two ways (translation and rotation) of ray transmission to capture attenuated radiation automatically. The result of object investigation is displayed in computer directly using a proposed reconstruction image technique. The reconstruction image was performed using Filtered Back Projection (FBP) algorithm and optimized with the weighted correction factor for each pixel. The weighted correction factor was computed based on the modeling of gamma ray transmission in selected mechanical system. In evaluating the proposed system, experiments were performed using a geothermal power plant pipe that has 275 mm diameter within known scaling form. Steady state water was flowed inside the pipe to simulate multiphase condition in geothermal power plant pipeline. Scanning configuration was set up to 4 mm steps and 32 projections. Based on the chosen evaluation criteria, the reconstruction image of the proposed system shows good result. Finally, the proposed portable gamma ray tomography system is suitable to industrial applications due to its portability and accuracy in detecting the form of pipeline scaling.
机译：便携式伽马射线断层扫描系统旨在调查地热发电管道缩放。此外，该系统可以应用于诊断工业过程单元，例如管道，热交换器等。该系统由机械部件，计算机控制模块，伽马射线源（CS-137的80mci），闪烁检测器NAI（TL），数据采集和计算机组成。机械部件被设计成满足诸如尺寸，位置，材料类型等的工业过程单元的可移植状标准。射线传输的两种方式（平移和旋转）扫描研究的射线，以自动捕获减毒辐射。对象调查的结果直接使用所提出的重建图像技术在计算机中显示。使用滤波后投影（FBP）算法进行重建图像，并用每个像素的加权校正因子进行优化。基于所选机械系统中的伽马射线传输的建模来计算加权校正因子。在评估所提出的系统时，使用在已知的缩放形式内具有275毫米直径的地热发电管管进行实验。稳态水流在管道内，以模拟地热发电管管道的多相条件。扫描配置设置为高达4毫米的步骤和32个投影。基于所选择的评估标准，所提出的系统的重建图像显示出良好的结果。最后，拟议的便携式伽马射线断层摄影系统适用于工业应用，因为其在检测管道缩放形式方面的便携性和准确性。

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