GB/T 34362-2017 in English
VALIDNon-destructive testing--Guide for eddy current testing using conformable sensor arrays
- Issued on:2017-09-29
- Implemented on:2018-04-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
$175.00
《GB/T 34362-2017无损检测 适形阵列涡流检测导则》由TC56（全国无损检测标准化技术委员会）归口，主管部门为国家标准化管理委员会。
Introduction
1. Standard Overview
GB/T 34362-2017 "Guidelines for Nondestructive Testing of Conformal Array Eddy Current Testing" is an important standard in my country's nondestructive testing field. It mainly regulates the method of discontinuity and material quality testing of conductive materials using conformal eddy current array sensors. This standard is applicable to non-magnetic and magnetic metal materials and composite materials containing conductive components, and especially emphasizes the detection of surface and curved workpieces.
2. Comparison of standard frameworks
| Standard dimensions | GB/T 34362—2017 | International integration | Main innovations |
|---|---|---|---|
| Scope of application | Discontinuity detection of conductive materials and material quality assessment | In line with international non-destructive testing standards | Introduction of conformal array eddy current technology for the first time |
| Core methods | Alternating current excitation, sensor response model | In line with international non-destructive testing technology trends | Combined with B-scan and C-scan display technologies |
| Equipment requirements | Electronic instruments, eddy current array sensors | Compatible with international advanced equipment | Support multi-frequency and multi-spatial wavelength configuration |
3. Technical background and evolution
Eddy current testing technology: Eddy current testing is an important means of non-destructive testing, which detects material discontinuities by inducing changes in current. Traditional eddy current testing is mainly applicable to planar workpieces, while GB/T 34362-2017 introduces conformal array sensors, which significantly improves the detection capabilities of curved surfaces and complex-shaped workpieces.
Technical evolution: From single-coil eddy current testing to multi-coil array testing, and then to conformal array eddy current testing, it reflects the trend of non-destructive testing technology towards high precision and high efficiency. The advancement of sensor technology is the core factor driving this evolution.
4. Implementation Suggestions
4.1 Personnel Training
According to the requirements of GB/T9445, testing personnel must undergo professional qualification certification and receive regular job training. Special emphasis is placed on the cultivation of operating skills and data analysis capabilities of conformal array sensors.
4.2 Equipment Selection
Select sensor specifications (such as operating frequency, number of array elements) according to the specific needs of the test piece. High frequency is suitable for surface discontinuity detection, and low frequency is suitable for deep discontinuity detection. It is recommended to give priority to equipment with multi-spatial wavelength configuration to improve detection flexibility.
4.3 Calibration and Verification
Perform no-load calibration and reference block calibration regularly, and combine system performance verification to ensure instrument stability. It is recommended to use reference blocks containing discontinuities in daily testing to improve the reliability of test results.
4.4 Data Analysis
The sensor response model is used to convert the measured data into physical property values (such as lift-off, conductivity, etc.), and the correlation filter and edge effect correction algorithm are combined to improve the defect recognition ability. It is recommended to use C-scan or B-scan display to intuitively present the test results.
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