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GB/T 28880-2012 English PDF

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GB/T 28880-2012: Non-destructive testing -- Evaluating performance characteristics of ultrasonic pulse-echo testing systems without the use of electronic measurement instruments
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Basic data

Standard ID GB/T 28880-2012 (GB/T28880-2012)
Description (Translated English) Non-destructive testing -- Evaluating performance characteristics of ultrasonic pulse-echo testing systems without the use of electronic measurement instruments
Sector / Industry National Standard (Recommended)
Classification of Chinese Standard N77
Classification of International Standard 19.100
Word Count Estimation 28,266
Quoted Standard GB/T 11259-2008; GB/T 12604.1; GB/T 19799.1-2005; ASTM E114; ASTM E127; ASTM E214; IEEE Standard 100
Adopted Standard ISO 18175-2004, MOD
Regulation (derived from) National Standards Bulletin 2012 No. 28
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 technical requirements for hearing aids, measurement methods, inspection rules, marking, packaging, transport and storage. This standard applies to air conduction and bone conduction hearing aids.

GB/T 28880-2012: Non-destructive testing -- Evaluating performance characteristics of ultrasonic pulse-echo testing systems without the use of electronic measurement instruments


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Non-destructive testing. Evaluating performance characteristics of ultrasonic pulse-echo testing systems without the use of electronic measurement instruments ICS 19.100 N77 National Standards of People's Republic of China Non-destructive testing of electronic measuring instruments without pulse Evaluation reflective ultrasonic testing system performance characteristics (ISO 18175.2004, MOD) Issued on. 2012-11-05 2013-02-15 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Table of Contents

Introduction Ⅲ 1 Scope 1 2 Normative references 1 3 Terms and definitions 2 4 Principle 2 5. Significance and Use 2 6 ultrasound method to measure the response data 3 6.1 General 3 6.2 Limit and horizontal linear level 3 6.3 Vertical Limit and vertical linear 6 6.4 Resolution 12 6.5 sensitivity and noise 15 6.6 calibrated accuracy of the gain controller 16 6.7 Detection of straight beam emitted pulse (start pulse) after the "blind spot" 17 6.8 oblique detection sensitivity and resolution 17 7 Report 18 7.1 General 18 18 7.2 Format 8 precision and systematic errors 18 Keywords 9 18 Resolution reference blocks 19 6 Appendix A (informative) designed diagram RB-RA type Annex B (informative) Permissible, RB-RC type, RB-E-type reference block 21 Determination of sensitivity and resolution Annex C (informative) using technology to detect when dipped 23

Foreword

This standard was drafted in accordance with GB/T 1.1-2009 given rules. This standard uses redrafted Law Amendment uses ISO 18175.2004 "without destructive testing of electronic measuring instruments for ultra pulse reflection Evaluation of sound detection system performance characteristics. " This standard and ISO 18175.2004 technical differences and their reasons are as follows. --- Information on normative references, this standard has been adjusted with technical differences, in order to adapt to China's technical conditions, adjustment Focus reflected in Chapter 2, "Normative references", the specific adjustments are as follows. • with considerable technical content GB/T 11259-1999 instead ASTME428-2000 (see 6.4.2); • equivalents adoption of international standards GB/T 12604.1 instead of ISO 5577 (see Chapter 3); • Increased use of international standards ISO 2400 equivalent in the file list. 1972 GB/T 19799.1-2005 (see Appendix C, C.1.3); • Delete the file list in the ISO 18175. ASTME1316-2002a "NDT term" original 2004 references, This standard defines the terms included in the GB/T 12604.1 in; • Delete the file list in the ISO 18175.2004 original reference JISZ2352, and ISO 18175.2004 references Content JISZ2352 direct cost to prepare a standard clause (see 6.4.5 and 6.4.6). --- According to the norms of standard mechanical drawing this standard design and dimensioning method; --- The standard uniform application of the International System of Units (SI); --- Added Appendix B "RB-RA type Permissible, RB-RC type, RB-E-type reference block"; --- Added Appendix C "sensitivity and determination methods adopted resolution oblique detect when." This standard made the following editorial changes. --- Use the "standard" instead of "this International Standard"; --- Remove the ISO 18175.2004 foreword, preface rewritten. Please note that some of the content of this document may involve patents. Release mechanism of the present document does not assume responsibility for the identification of these patents. The standard proposed by China Machinery Industry Federation. This standard by the National Standardization Technical Committee tester (SAC/TC122) centralized. This standard was drafted. first Chinese company Beijing Institute of Aeronautical Materials aviation industry, Changchun Mechanical Engineering Research Institute Co. Division of Guangzhou University. The main drafters of this standard. Liang Jing, Chen Hong Cheng, Xu Zhong roots. Non-destructive testing of electronic measuring instruments without pulse Evaluation reflective ultrasonic testing system performance characteristics Disclaimer. This standard does not involve security provisions associated with its use, even if not entirely. In this standard before the development of appropriate Safety and health regulations, and the provisions defining the scope of responsibility of the user.

1 Scope

This standard describes the assessment of pulse-echo ultrasonic detector (hereinafter referred to as the detector) following the performance characteristics of the method. --- Horizontal limit and horizontal linear; --- Vertical Limit vertical and linear; --- Resolution of the incident surface and back; --- Sensitivity and noise; --- Accuracy after calibration gain controller. Assessment of these characteristics is mainly used for comparison between the detector, or through periodic retesting for the assessment of a given detector characteristics Long-term changes, these changes may be a sign of the failure detector will occur. If the change exceeds a given limit, the detector needs to be corrected Or maintenance. This standard can also be used to assess the use of pulse wave trains and A-type display (RF or video) of the ultrasonic detector. This method is suitable for the workshop Or site conditions, and no other electronic measuring instruments. This standard does not provide for the detection performance of the system to be limits, and if the need for such acceptance criteria shall be specified by the consumer. The standard Registration acceptance criteria presented only as an example, client and end-user control file contains more or less restrictive test Income limits. Predetermined parameters need assessment, testing conditions and frequency, as well as reports and other data required by users should also be determined. This standard can be Used to assess the integrity of the testing system comprises a probe, detector, coupling, fixtures, and external alarms and auxiliary devices, mainly applies The system does not change the state of the system or reused without replacement parts. This standard is not a substitute for a given material used for the detection system calibration. In addition to being assessed detector, the required testing apparatus including selected reference block and precision external attenuator (when specified at the time). This standard also contains the outcome of the application and assessment of evaluation methods and other aspects of the terms of interpretation. Alternate methods of the present examples of the standard or other methods only when the customer agrees to use.

2 Normative references

The following documents for the application of this document is essential. For dated references, only the dated version suitable for use herein Member. For undated references, the latest edition (including any amendments) applies to this document. GB/T 11259-2008 and produce destructive testing method for detecting ultrasonic testing of steel reference blocks GB/T 12604.1 Terminology for nondestructive testing Ultrasonic testing (GB/T 12604.1-2005, ISO 5577.2000, IDT) GB/T 19799.1-2005 destructive testing ultrasonic testing calibration block No. 1 (ISO 2400. 1972, IDT) ASTME114 contact method to direct the beam of ultrasonic pulse echo detection procedures (ASTM E114-1995, Standard practiceforultrasonicpulse-echostraight-beamexaminationbythecontactmethod) ASTME127 aluminum production and inspection rules ultrasound standard reference blocks (ASTME127-1998, Standard

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