An industrial radiography exposure device based on measurement of transmitted gamma-ray intensity

International Nuclear Science and Technology Conference 2014

Polee, C.^1 ; Chankow, N.^1 ; Srisatit, S.^1 ; Thong-Aram, D.^1

Department of Nuclear Engineering, Faculty of Engineering, Chulalongkom University, Bangkok, Thailand^1

关键词: Bluetooth communications;    Correction factors;    Film radiography;    Process economics;    Quick measurement;    Small detectors;    Specimen thickness;    Transmitted intensities;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/611/1/012020/pdf
DOI  :  10.1088/1742-6596/611/1/012020

来源: IOP

【 摘 要 】

In film radiography, underexposure and overexposure may happen particularly when lacking information of specimen material and hollowness. This paper describes a method and a device for determining exposure in industrial gamma-ray radiography based on quick measurement of transmitted gamma-ray intensity with a small detector. Application software was developed for Android mobile phone to remotely control the device and to display counting data via Bluetooth communication. Prior to film exposure, the device is placed behind a specimen to measure transmitted intensity which is inversely proportional to the exposure. Unlike in using the conventional exposure curve, correction factors for source decay, source-to- film distance, specimen thickness and kind of material are not needed. The developed technique and device make radiographic process economic, convenient and more reliable.