Design Of An Infrared Tomography System For Detection Of Bubbles

2012 ◽  
Author(s):  
Mohamad Aizat Hashim ◽  
Yusri Yunos ◽  
Ruzairi Abdul Rahim ◽  
Herlina Abdul Rahim ◽  
Saiful Badri Mansor ◽  
...  
Keyword(s):  
Light Attenuation ◽  
Optical Tomography ◽  
Vertical Column ◽  
Orthogonal Projections ◽  
Optical Process ◽  
Tomography System ◽  
Process Tomography ◽  
The Difference ◽  
Infrared Tomography ◽  
Analogue To Digital

Dalam kajian ini, sebuah sistem tomografi menggunakan penderia direka untuk digunakan untuk model paip menegak. Sistem tomografi ini akan digunakan untuk mengira jumlah buih sambil mengukur saiz buih yang terkandung dalam model paip yang diisi dengan air. Sistem ini akan direka bermula dari pemilihan jenis penderia optik sehinggalah ke teknik pemprosesan data. Penderia cahaya infra merah digunakan sebagai sumber cahaya untuk sistem ini. Sifat–sifat beberapa diod foto dikaji dan dibandingkan bagi memilih model yang sesuai untuk sistem ini. Mikro pengawal berfungsi untuk melakukan kerja penukaran isyarat analog ke digital. Beberapa eksperimen telah dijalankan bagi mengenal pasti prestasi sistem penderia tersebut. Hukum Lambert–Beer menyatakan bahawa atenuasi dan penyerapan cahaya berlaku apabila cahaya melintasi bahan yang berlainan. Beberapa eksperimen dijalankan bagi mengetahui sama ada sistem ini mampu mengesan buih dalam paip yang mengandungi air. Data yang diperoleh akan dibandingkan dengan hipotesis yang dibuat mengenai atenuasi dan penyerapan cahaya. Kata kunci: Tomografi optik; kadar halaju zarah; proses tomografi. In this study, an optical process tomography with 2 orthogonal projections is being designed to be implemented at a vertical column modelled. The tomography system will be designed from the development of transducer pairs to the data acquisition system implemented. Infrared emitters are being considered as a light source due to the difference of its wavelength with the wavelength of visible light. Photodiodes are being characterized and compared for maximizing its performance when integrated with the system. Microcontrollers are functioned to perform analogue–to–digital conversion. Experiments are being conducted to investigate whether the system is able to detect gas bubbles in the vertical column. The results from the studies will be compared with theoretical hypotheses of light absorption and light attenuation. Key words: Optical tomography; mass flow rate; process tomography

Hardware Design of Laser Optical Tomography System for Detection of Bubbles Column

2013 ◽  
Vol 64 (5) ◽  
Author(s):  
Naizatul Shima Mohd Fadzil ◽  
Ruzairi Abdul Rahim ◽  
Mohd Safirin Karis ◽  
Siti Zarina Mohd Muji ◽  
Mohd Fadzli Abdul Sahib ◽  
...  
Keyword(s):  
Voltage Drop ◽  
Optical Tomography ◽  
Hardware Design ◽  
Bubble Columns ◽  
Two Phase ◽  
Vertical Column ◽  
Cross Sectional ◽  
Chemical Process Industry ◽  
Tomography System ◽  
Wide Range

This paper presents a hardware design and optical tomography application for fast cross sectional detection of single or two phase flows in pipes or bubble columns. Sixteen laser pointer transmitters and photodiode receivers are arranged at the object cross sectional boundary to detect the existence of bubbles inside a vertical column pipeline. A valve is installed at the bottom of the pipe to produce the source of bubbles. Due to the simple operation, good heat transfer and mass transfer of bubble columns, they can be applied in a wide range of applications in the chemical process industry. The size of the bubbles produced was estimated to be between 5 mm and 20 mm in diameter. The voltage drop at the sensor directly shows the existence of bubbles between the transmitter and receiver.

A Novel Electrical Cpacitance Sensor Design For Dual Modality Tomography Multiphase Measurement

2013 ◽  
Vol 64 (5) ◽  
Author(s):  
Muhammad Jaysuman Pusppanathan ◽  
Fazlul Rahman Yunus ◽  
Nor Muzakkir Nor Ayob ◽  
Ruzairi Abdul Rahim ◽  
Fatin Aliah Phang ◽  
...  
Keyword(s):  
Multiphase Flow ◽  
Flow Measurement ◽  
Ultrasonic Tomography ◽  
Pipe Surface ◽  
Dual Modality ◽  
Tomography System ◽  
Imaging Result ◽  
Process Tomography ◽  
Single Sensor ◽  
Capacitance Tomography

Electrical capacitance tomography (ECT) is one of process tomography technique which is developed rapidly in recent years. ECT is an imaging technique to obtain the internal permittivity distribution of a vessel or pipe by using capacitance electrodes sensor. This method has been integrated with ultrasonic tomography as multimodality system to perform multiphase flow measurement such as crude oil separation and oil process industry. In the present paper, a novel type of ECT sensor was developed using copper FR4 material. The electrode sensors can be flexibly bend or curve to fit the pipe surface for optimum measurement. Thus, every single sensor strip is designed to be functioned independently. Such system has lower sensing capability in the central of the sensing area which often contributes to poor imaging result. This problem can be overcome by combining the ECT with ultrasonic tomography to form a dual modality tomography system. By implementing the new ECT sensor, multiphase flow measurement image results can be achieved. The reconstructed image results are presented in this paper.

A Review of Process Tomography Application in Inspection System

2014 ◽  
Vol 70 (3) ◽  
Author(s):  
Yasmin Abdul Wahab ◽  
Ruzairi Abdul Rahim ◽  
Mohd Hafiz Fazlul Rahiman ◽  
Herlina Abdul Rahim ◽  
Suzanna Ridzuan Aw ◽  
...  
Keyword(s):  
Electrical Impedance ◽  
Optical Tomography ◽  
Good Condition ◽  
Future Research ◽  
Inspection System ◽  
Ultrasonic Tomography ◽  
Impedance Tomography ◽  
X Ray ◽  
Process Tomography ◽  
Non Destructive

The inspection system is crucial to ensure the system is always in a good condition. A technique that can be used for inspection system is process tomography. By promising non-destructive approach; various types of process tomography applied in civil, manufacturing and electrical applications. The purpose of this paper is to review the types of process tomography such as ultrasonic tomography, x-ray tomography, optical tomography, electrical resistance tomography, and electrical impedance tomography that had been applied to the inspection system. Variety techniques of inspection based on those sensors briefly discussed in this paper. The result showed that the process tomography expanded tremendously in the inspection system. Finally, a potential future research on the inspection system in the civil application proposed in this paper.

Concentration measurements of bubbles in a water column using an optical tomography system

2012 ◽  
Vol 51 (6) ◽  
pp. 821-826 ◽  
Author(s):  
S. Ibrahim ◽  
Mohd Amri.Md Yunus ◽  
R.G. Green ◽  
K. Dutton
Keyword(s):  
Water Column ◽  
Optical Tomography ◽  
Tomography System ◽  
Concentration Measurements

scholarly journals Design and implementation of a multifrequency near-infrared diffuse optical tomography system

2006 ◽  
Vol 11 (1) ◽  
pp. 014020 ◽  
Author(s):  
Gultekin Gulsen ◽  
Bin Xiong ◽  
Ozlem Birgul ◽  
Orhan Nalcioglu
Keyword(s):  
Near Infrared ◽  
Optical Tomography ◽  
Diffuse Optical Tomography ◽  
Design And Implementation ◽  
Tomography System

scholarly journals Functional imaging of the human brain using a modular, fibre-less, high-density diffuse optical tomography system

2016 ◽  
Vol 7 (10) ◽  
pp. 4275 ◽  
Author(s):  
Danial Chitnis ◽  
Robert J. Cooper ◽  
Laura Dempsey ◽  
Samuel Powell ◽  
Simone Quaggia ◽  
...  
Keyword(s):  
Human Brain ◽  
Functional Imaging ◽  
Optical Tomography ◽  
Diffuse Optical Tomography ◽  
High Density ◽  
Tomography System

Design of an applied optical fiber process tomography system

2005 ◽  
Vol 104 (2) ◽  
pp. 324-331 ◽  
Author(s):  
Chunsheng Yan ◽  
Jing Zhong ◽  
Yanbiao Liao ◽  
Shurong Lai ◽  
Min Zhang ◽  
...  
Keyword(s):  
Optical Fiber ◽  
Tomography System ◽  
Process Tomography ◽  
Fiber Process
Sign in / Sign up

Export Citation Format

Share Document