Method for changing energize mode to realize different mode electromagnetic detection

Abstract

The invention discloses a method which realizes electromagnetic testing in different ways through changing motivation models. Wherein, a sensor is imposed with different motivation models: a sine wave motivation is imposed when carrying out eddy current testing, a square wave motivation is imposed when carrying out magnetic flux leakage, and a high duty ratio pulse motivation is imposed when carrying out magnetic memory testing, then the sensing signals obtained in different motivation models are carried out different analysis and processing so as to obtain different detection parameters, thereby the invention not only can respectively realize single eddy current testing or magnetic flux leakage or magnetic memory testing according to the requirements of different components to be detected, but also can obtain the detection parameters of eddy current testing, magnetic flux leakage, and magnetic memory testing through time-sharing detection according the requirement of the same component to be detected. Thus, the invention brings great convenience for people and greatly reduces the production cost of the detector.

Description

technical field [0001] The invention relates to a non-destructive testing method, in particular to a method for realizing electromagnetic testing in different modes by changing excitation modes. Background technique [0002] Non-destructive testing NDT (nondestructive test) is a technology that detects its performance, quality, and internal defects without destroying or damaging the object under test. [0003] Electromagnetic testing technology belongs to non-destructive testing technology. Electromagnetic testing is a test method that uses the electrical and magnetic properties of materials under electromagnetic action to judge the performance of materials. Electromagnetic testing technology has been widely used in various industrial fields, especially This is especially true in manufacturing, aerospace, petrochemical and other fields. The methods based on electromagnetic detection principles in the prior art mainly include conventional eddy current detection methods, far-...

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Problems solved by technology

[0007] Because various electromagnetic detection methods have their own different characteristics, such as eddy current detection is more suitable for the detection of metal pipes, rods, and materials, and has a high detection sensitivity for surface defects, but it is not suitable for detecting internal defects in deep layers of metal materials. , so in the application process, it is necessary to have detection devices corresponding to various methods, such as eddy current detectors based on the principle of eddy current detection, magnetic memory detectors based on the principle of magnetic memory detection, and magnetic detectors based on the principle of magnetic flux leakage detection. Magnetic flux leakage detector, etc.

Whether eddy current testing, magnetic memory testing or magnetic flux leakage testing is used, the defect signals of the tested parts are usually obtained by using their own probes or sensors, and the defects of the tested parts are displayed through corresponding data processing and analysis methods. Due to different electromagnetic detection methods, different detection instruments and sensors are required, which brings great inconvenience to people's use, and also makes the production cost of the instrument higher.

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