Apparatus and method for detecting internal and external crack defects of metal material

A metal material and crack technology, which is applied in the field of detection of internal and external crack defects of metal materials, can solve problems such as inability to obtain complete defect information, and achieve the effect of improving defect evaluation and complete detection information

Inactive Publication Date: 2012-12-26
厦门艾帝尔电子科技有限公司
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a device for detecting internal and external crack defects of metal materials, so as to solve the problem that complete defect information cannot be obtained when non-destructive testing of metal materials is performed in the prior art

Method used

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  • Apparatus and method for detecting internal and external crack defects of metal material
  • Apparatus and method for detecting internal and external crack defects of metal material
  • Apparatus and method for detecting internal and external crack defects of metal material

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Embodiment Construction

[0031] In order to further explain the technical solution of the present invention, the present invention will be described in detail below through specific examples.

[0032] like Figure 1 to Figure 3 As shown, it is a device for detecting internal and external crack defects of metal materials involved in the present invention, including an input unit 1, a detection coil 2, a signal extraction unit 3 and a signal processing unit 4, wherein:

[0033] The input unit 1 has at least two signal generators 11, an adding circuit 12 and a power amplifier circuit 13, the signal generators 11 are used to generate excitation signals, and different signal generators 11 are used to generate excitation signals of different frequencies; The addition circuit 12 is connected to at least two signal generators 11, so that the excitation signals of different frequencies are superimposed to generate a composite excitation signal; the power amplifier circuit 13 is connected to the addition circui...

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Abstract

The invention discloses an apparatus and a method used for detecting internal and external crack defects of a metal material. The apparatus comprises an input unit, a detection coil, a signal extraction unit, and a signal processing unit. The input unit comprises at least two signal genitors used for respectively generating excitation signals with different frequencies, an addition circuit, and a power amplifying circuit connected with the addition circuit. The detection coil is connected with the power amplifying circuit, and is used for induce a workpiece requiring detection, such that frequencies are changed high and low. The signal extraction unit has a pre-amplification circuit connected with the detection coil, at least two band-pass filters which are connected with the pre-amplification circuit, and multi-way switches connected with the band-pass filters, wherein the number of the band-pass filters matches the number of the signal generators. The signal processing unit is connected with the multi-way switches, and is used for evaluating the quality of the workpiece requiring detection according to detection signals sent by the multi-way switches. With the apparatus provided by the invention, more information about the size and shape of the defects can be obtained, such that defect evaluation upon metal materials can be improved, and detection information can be more complete.

Description

technical field [0001] The invention relates to the technical field of flaw detection, and more specifically relates to a method for detecting internal and external crack defects of metal materials, which is based on frequency mixing technology to detect internal and external defects of plate or tubular metals in a magnetized state. Background technique [0002] With the development of the national economy, during the 11th to 12th five-year period in my country, the annual demand for high-quality metal bars has increased significantly, and it has clearly shown a trend of large-caliber development. In particular, automotive bearing rods that require corrosion resistance and extrusion resistance will become hot spots in demand as the country invests more in energy infrastructure and the automotive industry. As a result, the non-destructive testing of the quality assurance of these products puts forward new problems in terms of methods and technologies. [0003] According to t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/82
Inventor 陈金贵
Owner 厦门艾帝尔电子科技有限公司
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