GB/T 37540-2019 in English
VALIDNon-destructive testing—Digital image processing and communication for eddy current testing
- Issued on:2019-06-04
- Implemented on:2020-01-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
$243.00
《GB/T 37540-2019无损检测 涡流检测数字图像处理与通信》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
Standard Overview and Technical Background
GB/T 37540-2019 is my country's first national standard specifically for digital image processing for eddy current testing, filling the gap in digital image standardization in the field of electromagnetic non-destructive testing. The standard is based on the DICOM (Digital Imaging and Communications in Medicine) framework and innovatively introduces the medical imaging standard system into the field of industrial testing.
Core Content Analysis
1. Information Object Definition System
| Attribute Category | Single Frame Image (EC) | Multi-Frame Image (EC-MF) |
|---|---|---|
| Basic Attributes | 15 items including pixel/device/instrument | Add 18 items including movie/multi-frame |
| Special Attributes | Plane Configuration | Frame Indicator |
| Shared Attributes | 12 items including VOI Lookup Table/Overlapping Planes | |
2. Key Equipment Parameter Specifications
Typical case: In the inspection of aircraft engine blades, the eddy current tester must record the probe parameters:
- Coil shape (circular/rectangular)
- Nominal frequency (1-5MHz)
- Measured bandwidth (±3dB)
Implementation suggestions
1. Image acquisition link
| Parameters | High-speed rail wheelset inspection | Aerospace composite materials |
|---|---|---|
| Pixel representation | Unsigned integer | Signed integer |
| Physical unit | mm | cm |
| Sampling rate | ≥100Hz | ≥1kHz |
2. Data communication optimization
It is recommended to use the SOP class UID defined in the standard (1.2.840.10008.5.1.4.1.1.601 series) to ensure the compatibility of the eddy current testing system between equipment from different manufacturers.
Technology Evolution Analysis
Compared with GB/T 30821-2014, this standard adds:
- Multi-frame image processing specifications
- 17 special physical units (such as Tesla/Henry)
- Structured definition of probe parameters (including 6 types of coil shapes)
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