Labview Based Driver For Charge–Coupled Device Linear Image Sensor
DOI:
https://doi.org/10.11113/jt.v55.921Abstract
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 tomographyDownloads
Published
2012-03-21
Issue
Section
Science and Engineering
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How to Cite
Labview Based Driver For Charge–Coupled Device Linear Image Sensor. (2012). Jurnal Teknologi (Sciences & Engineering), 55(1), 129–140. https://doi.org/10.11113/jt.v55.921