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