GB/T 38896-2020Non-destructive testing—Integrated non-destructive testing—General principles (English PDF)

3.1 Integrated non-destructive testing

A comprehensive technology that integrates two or more independent non-destructive testing methods or technologies, has integrated testing apparatus and/or sensor hardware structure and integrated software structure, and can perform comprehensive processing like data fusion against the acquired test data and realize resource sharing.

It is the main feature of integrated non-destructive testing to realize the integration of multiple non-destructive testing methods through the organic integration of multi-disciplinary technologies such as machinery, electronics, and information. When integrating non-destructive testing, the scanning mechanism and discontinuous position information of different types of testing methods are shared; the sensors of different testing methods have an integrated structure and become an organic whole; the excitation and/or receiving circuits, and the analog-to-digital conversion circuit of different testing methods are shared. By integrating the testing information of different types of non-destructive testing methods, the surface and internal discontinuities and discontinuities of different directions of the tested object can be tested at the same time; it can also test and characterize the surface performance and/or stress state, etc. of the tested object. Therefore, the integrated non-destructive testing apparatus has better economy, the testing process has higher efficiency, and the accuracy and reliability of testing results are higher.

4.2 Technology

Integrated non-destructive testing generally includes the following modes such as non-destructive testing instrument integration, non-destructive testing network integration, and non-destructive testing cloud testing, etc.

The testing performance of the integrated non-destructive testing equipment shall be better than the simple sum of the testing effects of each single testing method, and has the following advantages:

--- Economy of the apparatus;

--- Comprehensiveness of testing information;

--- High testing efficiency;

--- Full coverage of the testing range;

--- Accuracy and reliability of test results, etc.

Integrated non-destructive testing includes but is not limited to the following technology combinations:

--- Eddy current-magnetic memory integrated testing technology: The combination of eddy current sensors and magnetic memory sensors are distributed on the same scanning surface of the sensor to form an integrated working sensor, which can simultaneously pick up discontinuities and stress abnormalities information at the same position of the tested ferromagnetic workpiece;

--- Eddy current-electromagnetic ultrasonic integrated testing technology: Excite and receive eddy current and ultrasonic signals in the tested metal workpiece, which can simultaneously test the surface, near surface and internal The usual testing objects are:

--- All kinds of raw materials, and all kinds of workpieces;

--- Transportation vehicles, such as ships, rail vehicles, aerospace vehicles;

--- large infrastructure;

--- Power system facilities;

--- Petroleum and petrochemical-related pipelines, storage tanks, and drilling platforms;

--- Other major facilities, equipment and components.

8.2 Integrated non-destructive testing instrument

The integrated non-destructive testing instrument shall have the testing functions of two or more non-destructive testing methods; and its functions and technical indicators shall be adaptive to the testing objects and testing purposes.

The integrated non-destructive testing instrument shall have the function of coordination and comprehensive processing of the testing process of two or more non-destructive testing methods; and should have an instrument operation control subsystem, a database subsystem, etc., to achieve non-destructive testing, data processing, data transmission and data storage management and other functions.

The testing instruments of the networked integrated nondestructive testing system shall also have network subsystems and servers to centrally manage the distributed testing subsystems, so that different subsystems can coordinate actions and achieve the overall system performance.

Appropriate technical means shall be adopted to inspect the functions and performance technical indicators of the integrated non-destructive testing instrument.

8.3 Testing sensor

The appropriate integrated testing sensor or sensor combination shall be selected according to the testing purpose and integrated non-destructive testing instrument.

The testing sensor shall be installed and used correctly according to the testing environment.

Appropriate technical means shall be adopted to inspect the function and performance technical indicators of the testing sensor.

8.4 Signal transmission and processing system

For the non-destructive testing networked integrated system with distributed testing structure, the signal transmission and processing system shall effectively transform and integrate different types of data distributed in different locations to realize the information sharing between the various subsystems.

The signal transmission and processing system shall follow the principles of reliability, effectiveness, and economy, and be selected according to the testing environment and […]