GB/T 23909.1-2009 English PDF

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GB/T 23909.1-2009: Non-destructive testing -- Radioscopic testing -- Part 1: Quantitative measurement of imaging properties
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 23909.1-2009	509	Add to Cart	4 days	Non-destructive testing -- Radioscopic testing -- Part 1: Quantitative measurement of imaging properties	Valid

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Basic data

Standard ID: GB/T 23909.1-2009 (GB/T23909.1-2009)
Description (Translated English): Non-destructive testing -- Radioscopic testing -- Part 1: Quantitative measurement of imaging properties
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: J04
Classification of International Standard: 19.100
Word Count Estimation: 22,246
Date of Issue: 2009-05-26
Date of Implementation: 2009-12-01
Adopted Standard: EN 13068-1-1999, MOD
Regulation (derived from): PRC National Standard Approval Announcement 2009 No.7 (Total No.147)
Issuing agency(ies): General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China
Summary: This standard specifies the use of electronic signal display unit or automatic image analysis system. By measuring the response to be recognized to carry out analysis of the sample ray fluoroscopy system. Measurements should be carried out in the fully equipped laboratory.

GB/T 23909.1-2009: Non-destructive testing -- Radioscopic testing -- Part 1: Quantitative measurement of imaging properties

---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Non-destructive testing Radioscopic testing Part 1. Quantitative measurement of imaging properties ICS 19.100 J04 National Standards of People's Republic of China NDT-ray fluoroscopy detected Part 1. Quantitative measurement of imaging performance Posted 2009-05-26 2009-12-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Foreword

GB/T 23909 "NDT-ray transmission detector" is divided into three parts. --- Part 1. Quantitative measurement of imaging performance; --- Part 2. Long-term stability of the imaging device calibration; --- Part 3. metallic materials by X - and gamma rays detected General. This is Part 1 GB/T 23909 of. The partial modification using EN13068-1.1999 "NDT-ray transmission detection - Part 1. Quantitative measurement of imaging performance." (In English). This section according to EN13068-1.1999 redrafted. Taking into account China's national conditions, in the use of EN13068-1.1999 when this part has made several modifications. About the technical differences are as follows. --- Delete Chapter 2, and the normative references EN29241-2 and EN29241-3 moved by reference. For ease of use, this section also made the following editorial changes. --- Remove European standard foreword; "." --- With a decimal point instead of a comma as the decimal point, ""; After --- delete Chapter 2, other clauses numbers sequentially changed. Appendix A of this section is an informative annex. This part of the National NDT Standardization Technical Committee (SAC/TC56) and focal points. This section drafted by. Austrian Alexander too Shandong Electric Co., Ltd., Shanghai IAC Inspection Technologies Ltd., Guangdong Steel Products Co. earnings-chuen The company, Shanghai Research Institute of Materials, GE Inspection Technologies Co., Ltd., 海艾因蒂克 Industries Limited. The main drafters of this section. Fan Qin, Chang first, Chen Renfu, according to Mr Tsang, Li Bo, Zhang YIMING, Zhang Rui. NDT-ray fluoroscopy detected Part 1. Quantitative measurement of imaging performance

1 Scope

GB /procedures specified in this T 23909 can be applied to provide an electronic signal display unit, or by automatic image analysis system There ray fluoroscopy system. In response to recognized measurement samples for analysis of the ray fluoroscopy system. Measurements should be installed in Preparation of the laboratory were perfect. You can obtain the imaging performance of the imaging system from the measurements. This section does not include imaging performance under dynamic. 2-ray fluoroscopy system Ray fluoroscopy system includes a radiation source, a processing system, the collimator, filter plate and the imaging device. The image forming apparatus includes an X-ray or gamma converting means, the attenuated radiation is converted into a digital output signal S of the optical display or (See Figure 1). The image processor may be part of the image forming apparatus. In the case of a visual assessment, which includes a display unit. In automatic Image evaluation system, the display unit is not part of the system. 1 ----ray source; 2 --- workpiece; 3 --- ray conversion means; 4 --- output signal; 5 --- image processor; 6 --- display unit. A typical arrangement ray fluoroscopy system of FIG. 1 To specify the imaging performance of the imaging device, the use of terms and parameters and information theory perspective ray detection. Table 1 parameter definition The image quality of the image forming apparatus. Table 1 image quality parameter Image quality parameter definition describes the main points Inherent unclear Degree Ui And excessive exposure ≤10% And from the intensity inherent unsharpness Edge spread function staircase function Small details distinguish objects limit Spatial modulation Transfer Function MTF + ∞ -∞ LSF (x0) d x0 + ∞ -∞ LSF (x0) = dESF (X) d x0 Differential space edge spread function After the ESF, Fourier transform The amplitude spectrum LSF. line spread function Object size contrast transfer function; Image sharpness function description ......

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