GB/T 38240-2019 English PDF

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GB/T 38240-2019: Non-destructive testing instruments - Standard practice for manufacturing characterization of digital detector arrays
Status: Valid

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GB/T 38240-2019	599	Add to Cart	5 days	Non-destructive testing instruments - Standard practice for manufacturing characterization of digital detector arrays	Valid

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Basic data

Standard ID: GB/T 38240-2019 (GB/T38240-2019)
Description (Translated English): Non-destructive testing instruments - Standard practice for manufacturing characterization of digital detector arrays
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: N78
Classification of International Standard: 19.100
Word Count Estimation: 30,381
Date of Issue: 2019-10-18
Date of Implementation: 2020-05-01
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration

GB/T 38240-2019: Non-destructive testing instruments - Standard practice for manufacturing characterization of digital detector arrays

---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 instruments--Standard practice for manufacturing characterization of digital detector arrays ICS 19.100 N78 National Standards of People's Republic of China Non-destructive testing instrument Array manufacturing features Published on.2019-10-18 2020-05-01 implementation State market supervision and administration China National Standardization Administration issued

Content

Foreword III 1 Scope 1 2 Normative references 1 3 Terms and Definitions 1 4 Meaning and use 3 5 Instruments and Devices 4 6 Calibration comparison and standard operation 6 7 Method 7 8 Results calculation or analysis 10 9 Display of manufacturer test results 19 10 Classification of Digital Detector Arrays 21 11 Accuracy and deviation 21 12 Keywords 21 Appendix A (Normative) Input and Output Data Templates 22 Reference 25

Foreword

This standard was drafted in accordance with the rules given in GB/T 1.1-2009. This standard was proposed by the China Machinery Industry Federation. This standard is under the jurisdiction of the National Testing Machine Standardization Technical Committee (SAC/TC122). This standard was drafted. Institute of Applied Electronics, China Academy of Engineering Physics, Shanghai Ruirui Optoelectronics Technology Co., Ltd., Shandong Province Jining Branch of Special Equipment Research Institute. The main drafters of this standard. Chen Hao, Wang Yuan, Chen Yunbin, Hu Dongcai, Qiu Chengbin, Fang Zhiqiang, Qiu Min, Jin Libo, Huang Ling Duan, Shen Defeng. Non-destructive testing instrument Array manufacturing features

1 Scope

This standard specifies the instruments and devices of the ray digital detector, calibration comparison and standard operation, detection methods, calculation and analysis of results, etc. content. This standard applies to digital area array detectors.

2 Normative references

The following documents are indispensable for the application of this document. For dated references, only dated versions apply to this article. Pieces. For undated references, the latest edition (including all amendments) applies to this document. ASTME1742 Radiographic Inspection Procedure (Standardpracticeforradiographicexamination) ASTME1815 Standard Test Method for Industrial Radiation Photographic Film System (Standardtestmethodforclassifi- Cationoffilmsystemsforindustrialradiography) ASTME2002 Standard Practice for Determining Total Image Unsharpness in Radiology (Standardpracticefordetermining Totalimageunsharpnessandbasicspatialresolutioninradiographyandradioscopy) ASTME2446 calculates the long-term stability of a radiographic system (Standardpracticeforufacturingcharacter- Izationofcomputedradiographysystems)

3 Terms and definitions

The following terms and definitions apply to this document. 3.1 Digital detector array system digitaldetecterarray (DDA) system A discrete array of electronic devices that convert ionizing radiation or penetrating radiation into analog signals. Then pass these digitized analog signals It is input to a computer and displayed in the form of a digital image of the radiant energy spectrum corresponding to the input area of the computer-driven method. Note. The first step in the conversion of ionizing radiation or penetrating radiation into an electronic signal is to convert it into visible light by using scintillation material ionizing radiation or penetrating radiation. This The speed range of these devices, generating an image from a few seconds until several images are generated in one second, reaching or exceeding the speed of real-time fluoroscopy (usually 30 frames/s). 3.2 Signal-to-noise ratio signal-to-noiseratio; SNR The ratio of the average of the signal strength to the standard deviation of the noise intensity depends on the radiation dose and the performance of the digital detector array system. 3.3 Contrast-noise ratio contrast-to-noiseratio; CNR The ratio of the average signal level difference between the two image regions to the standard deviation of the signal level. Note. In the application here, the above two image areas are step wedge grooves and substrate. The standard deviation of substrate strength is a measure of noise. The CNR depends on the radiation dose and the performance of the digital detector array system. ......

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