Labview Based Driver For Charge–Coupled Device Linear Image Sensor

2012 ◽  
Author(s):  
N. Ramli ◽  
M. N. Ibrahim ◽  
M. Idroas ◽  
F. K. Che Harun ◽  
N. H. Mahmood
Keyword(s):  
Output Signal ◽  
Optical Tomography ◽  
Optical Path Length ◽  
Image Sensor ◽  
Optical Path ◽  
Solid Particles ◽  
Optical Intensity ◽  
Charge Coupled Device ◽  
Tomography System ◽  
Tomographic Data

Kertas kerja ini menerangkan tentang pembangunan sistem pemacu untuk sensor imej lelurus peranti pengecas gandingan (CCD) dalam system tomografi optik berasaskan perisian LabVIEW. Sensor imej lelurus CCD jenis SONY ILX551A yang mempunyai 2048 piksel yang efektif dengan setiap pixel bersaiz 14 mikron telah digunakan. Sensor ini memerlukan isyarat-isyarat jam (ΦROG dan ΦCLK) yang sesuai sebelum nilai-nilai piksel yang mewakili keamatan optik yang diukur dalam voltan dapat dibaca secara sesiri. Keluaran dari CCD adalah keamatan optik yang diukur dalam unit voltan atau bayangan objek yang memotong alur cahaya iaitu panjang laluan di antara punca cahaya dan sensor CCD. Apabila pepejal menghalang sebahagian laluan optik, bayangan objek akan terpancar ke atas beberapa piksel sensor CCD yang terlibat, dan nilai keluaran didapati. Lokasi objek yang tepat dari isyarat keluaran untuk beberapa keadaan adalah penting untuk mengesahkan isyarat jam adalah sesuai untuk sensor Sony ILX551A. Hasil keputusan menunjukkan isyarat jam pada frekuensi 1MHz yang dikenakan dikenakan kepada sensor CCD Sony ILX551A berjaya dijanakan dan data tomografi mampu diperolehi. Kata kunci: Tomografi optik; LabVIEW; sensor imej linar CCD; unjuran This paper describes the development of LabVIEW based driver for charge-coupled device (CCD) linear image sensor in optical tomography system. The Sony ILX551A CCD linear image sensor contains 2048 effective pixels, each pixel approximately 14 microns in size. The sensor requires suitable clocking signals (ΦROG and ΦCLK) before the pixel values that represent the attenuated optical intensity can be serially read. The output from the CCD is the optical intensity measured in voltage or shadow of the object intercepting the optical beam, pathlength between light source and the CCD linear image sensor. When solid particles blocking certain area of the optical path length, the shadow of the object will be casted on several affected pixels of the linear image sensor, and value on the output signal will be obtained. The exact location of objects on output signal produced for various conditions is important in order to verify the proper clocking signals generated for Sony ILX551A. The results demonstrate that the clocking signal at 1MHz frequency for the CCD Sony ILX551A is successfully generated and capable of acquiring tomographic data. Key words: CCD linear image sensor; LabVIEW; projection; optical tomography

Concentration Profiling Of Two Phase Flow In A Gravity Flow Rig Using Optical Tomography

2012 ◽  
Author(s):  
Sallehuddin Ibrahim ◽  
Mohd Fua’ad Rahmat ◽  
Mustafa Musbah Elmajri ◽  
Mohammad Amri Mohammad Yunus
Keyword(s):  
Cross Section ◽  
Two Phase Flow ◽  
Optical Tomography ◽  
Solid Particles ◽  
Gravity Flow ◽  
Phase Flow ◽  
Two Phase ◽  
Tomography System ◽  
Infra Red ◽  
Tomography Method

Matlamat kertas kerja ini ialah untuk membentangkan penyelidikan tentang penggunaan kaedah tomografi optik menggunakan penderia–penderia infra merah untuk pemantauan masa nyata terhadap zarah–zarah pepejal yang dialirkan oleh rig aliran graviti. Penderia terdiri daripada dua projeksi cahaya orthogonal dan dua projeksi cahaya melintang untuk membentuk deretan atas dan bawah menjadi empat projeksi selari. Penumpuan pancaran daripada satu sumber cahaya dan mengalirkannya melalui rejim aliran yang memastikan keamatan pancaran dikesan pada bahagian yang bertentangan disambungkan kepada agihan dan pekali serapan bagi fasa–fasa yang berbeza dalam laluan pancaran. Maklumat pada aliran yang diperolehi oleh penderia-penderia yang dipasang di bahagian atas dan bawah akan dijadikan dalam bentuk digital oleh sistem perolehan data sebelum ia dihantar ke sebuah computer untuk dianalisis untuk memaparkan keratan silang imej. Penyelidikan ini berjaya dikembangkan dan diuji menggunakan sebuah sistem tomografi infra merah untuk memaparkan kepekatan aliran dwi fasa dalam rig aliran gravity. Kata kunci: Profil kepekatan; aliran dwi fasa; tomografi optic; infra-merah; aliran pepejal The objective of this paper is to present research on the use of an optical tomography method using infra–red sensors for real–time monitoring of solid particles conveyed by a gravity flow rig. The sensor comprised two orthogonal and two diagonal light projections to form upstream and downstream arrays in a total of four parallel projections. Collimating the radiated beam from a light source and passing it through a flow regime ensures that the intensity of radiation detected on the opposite side is linked to the distribution and the absorption coefficients of the different phases in the path of the beam. The information on the flow captured using upstream and downstream infra-red sensors is digitized by the DAS system before it was passed into a computer to be analyzed in order to reconstruct the cross section image. This investigation successfully developed and tested an infra–red tomography system to profile the concentration of two phase flow in a gravity flow rig. Key words: Concentration profiles; two phase flow; optical tomography; infra–red; solid flow

OPTICAL TOMOGRAPHY SYSTEM: APPLICATION OF CHARGE COUPLED DEVICE (CCD) FOR SOLID AND TRANSPARENT OBJECTS DETECTION

2016 ◽  
Vol 78 (7-4) ◽  
Author(s):  
Juliza Jamaludin ◽  
Ruzairi Abdul Rahim ◽  
Herlina Abdul Rahim ◽  
Hafiz Fazalul Rahiman ◽  
Siti Zarina Mohd Muji ◽  
...  
Keyword(s):  
Image Reconstruction ◽  
Laser Diode ◽  
Optical Tomography ◽  
Pipeline System ◽  
Cross Sectional ◽  
Charge Coupled Device ◽  
Tomography System ◽  
Solid Objects ◽  
Transparent Objects ◽  
Objects Detection

This research presents an application of Charge Coupled Device (CCD) linear sensor and laser diode in an optical tomography system. These optoelectronic sensors are believed to detect solid objects rather than transparent objects. Based on the research results, the development of optical tomography system using Charge Coupled Device (CCD) and laser diode has helped to enhance the potential of these sensors in detecting high to low opacity objects. Experiments for detecting a solid rod, glass rod and transparent hollow straw in non-flowing crystal clear water were conducted in this study. Investigation on the effect of number of views also studied in this research. From the image reconstruction results, it clearly shows a cross-sectional image of a pipeline system with the existence of opaque and transparent objects in multiphase flows. For 320 views image reconstruction, it gives high resolution of image results compared to 160 views image reconstruction. 

Charge-coupled device based on optical tomography system in detecting solid and transparent objects in non-flowing crystal clear water

Optik ◽  
2017 ◽  
Vol 131 ◽  
pp. 813-825 ◽  
Author(s):  
Juliza Jamaludin ◽  
Ruzairi Abdul Rahim ◽  
Herlina Binti Abdul Rahim ◽  
Mohd Hafiz Fazalul Rahiman ◽  
Jemmy Mohd Rohani ◽  
...  
Keyword(s):  
Optical Tomography ◽  
Clear Water ◽  
Charge Coupled Device ◽  
Tomography System ◽  
Transparent Objects

Analysis on the Effect of Sensor Views in Image Reconstruction Produced by Optical Tomography System Using Charge-Coupled Device

2018 ◽  
Vol 27 (4) ◽  
pp. 1689-1696 ◽  
Author(s):  
Juliza Jamaludin ◽  
Ruzairi Abdul Rahim ◽  
Mohd. Hafiz Fazul Rahiman ◽  
Jemmy Mohd Rohani
Keyword(s):  
Image Reconstruction ◽  
Optical Tomography ◽  
Charge Coupled Device ◽  
Tomography System

scholarly journals In vivo optical imaging of physiological responses to photostimulation in human photoreceptors

2016 ◽  
Vol 113 (46) ◽  
pp. 13138-13143 ◽  
Author(s):  
Dierck Hillmann ◽  
Hendrik Spahr ◽  
Clara Pfäffle ◽  
Helge Sudkamp ◽  
Gesa Franke ◽  
...  
Keyword(s):  
Path Length ◽  
Ex Vivo ◽  
Optical Path Length ◽  
Optical Path ◽  
Clinical Diagnostics ◽  
Photoreceptor Outer Segment ◽  
Cellular Processes ◽  
Tomography System ◽  
Length Changes

Noninvasive functional imaging of molecular and cellular processes of vision may have immense impact on research and clinical diagnostics. Although suitable intrinsic optical signals (IOSs) have been observed ex vivo and in immobilized animals in vivo, detecting IOSs of photoreceptor activity in living humans was cumbersome and time consuming. Here, we observed clear spatially and temporally resolved changes in the optical path length of the photoreceptor outer segment as a response to an optical stimulus in the living human eye. To witness these changes, we evaluated phase data obtained with a parallelized and computationally aberration-corrected optical coherence tomography system. The noninvasive detection of optical path length changes shows neuronal photoreceptor activity of single cones in living human retina, and therefore, it may provide diagnostic options in ophthalmology and neurology and could provide insights into visual phototransduction in humans.

scholarly journals Design of the Optical Tomography System for Four Projections CMOS Linear Image Sensor

2013 ◽  
Vol 61 (2) ◽  
Author(s):  
Norhafizah Ramli ◽  
Mariani Idroas ◽  
Muhammad Nasir Ibrahim ◽  
Nur Hasanah Shafei
Keyword(s):  
Data Acquisition ◽  
Optical Tomography ◽  
Complementary Metal Oxide Semiconductor ◽  
Image Sensor ◽  
Metal Oxide Semiconductor ◽  
Oxide Semiconductor ◽  
Sensor Surface ◽  
Tomography System ◽  
Serial Data ◽  
Sensor Measurement

The main purpose of this study is to design the optical tomography system for four projections complementary metal–oxide–semiconductor (CMOS) linear image sensor. This system includes the development of suitable driver for the operation of CMOS S10077 linear image sensor, measurement section and data acquisition system. The CMOS linear image sensor S10077 is configured around a flow pipe with an octagonal–shaped measurement section. This image sensor scans image of object inside the pipe from four different projections angle. When light hit the object, shadow will cast on the sensor surface. The output signal is obtained based on the light intensity projected to the sensor. Microcontroller PIC 18F4620 is used as a driver to enable the operation of CMOS linear image sensor and microcontroller PIC 18F458 is used as a data acquisition circuit for optical tomography system. Microcontroller retrieves serial data from the CMOS linear image sensor and sends it to a PC for further work in image reconstruction.

scholarly journals Online Optical Tomography System Application of Charge-Coupled Device (CCD) for Object Detection in Crystal Clear Water

2016 ◽  
Vol 14 (1) ◽  
Author(s):  
Juliza Jamaludin ◽  
◽  
Ruzairi Abdul Rahim ◽  
Herlina Binti Abdul Rahim ◽  
Mohd Hafiz Fazalul Rahiman ◽  
...  
Keyword(s):  
Object Detection ◽  
System Application ◽  
Optical Tomography ◽  
Clear Water ◽  
Charge Coupled Device ◽  
Tomography System
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