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Needle type magnetic repulsion focusing detection sensor and detection system

A detection sensor and detection system technology, which is applied in the direction of material magnetic variables, etc., can solve the problem of low detection resolution of microscopic topography on the surface of magnetic materials, and achieve the effect of enhancing magnetic field strength and high detection accuracy

Active Publication Date: 2021-08-20
HUAZHONG UNIV OF SCI & TECH
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Problems solved by technology

[0005] In view of the above defects or improvement needs of the prior art, the present invention provides a needle-type magnetic repulsion focusing detection sensor and detection system, which uses magnetic repulsion focusing to solve the problem of low resolution of magnetic material surface micro-morphology and defect detection

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  • Needle type magnetic repulsion focusing detection sensor and detection system
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  • Needle type magnetic repulsion focusing detection sensor and detection system

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Embodiment Construction

[0032] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not constitute a conflict with each other.

[0033] like figure 1 As shown, a needle-type magnetic repulsion focusing detection sensor includes a permanent magnet 2, a magnetic guiding core 3 and an inductive element 4. In this embodiment, the permanent magnet 2 is composed of a pair of identical polarities opposite Composed of sub-permanent magnets, the induction element 4 is a ring coil wound on the probe of the magnetic guiding core 3,...

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Abstract

The invention belongs to the related technical field of nondestructive testing, and discloses a needle type magnetic repulsion focusing detection sensor and a detection system. The detection sensor comprises a permanent magnet, a magnetic guiding core and a sensing element, the permanent magnet is used for generating mutually-exclusive magnetic fields, the magnetic guiding core is arranged at the center of the permanent magnet and used for gathering the mutually-exclusive magnetic fields generated by the permanent magnet at the center and guiding the magnetic fields to the magnetic guiding core, and the sensing element is arranged on the magnetic guiding core. The sensing element is arranged on the magnetic guiding core, when the detection sensor is adopted to detect the surface appearance of a magnetic material to be detected, the change of the surface appearance causes the change of a magnetic field in the magnetic guiding core, and the sensing element is used for detecting the change of the magnetic field in the magnetic guiding core and converting the change into an electric signal; therefore, the surface appearance of the to-be-detected magnetic material is detected. According to the invention, the problem of low detection resolution of the tiny morphology on the surface of the magnetic material is solved.

Description

technical field [0001] The invention belongs to the technical field related to non-destructive testing, and more specifically relates to a detection sensor and a detection system for needle-type magnetic repulsion focusing. Background technique [0002] In the high-precision manufacturing process of metal parts, due to the complex mechanical and physical behaviors and processes in the processing, it is difficult to improve the surface quality of ferromagnetic metal parts. In addition to the quality and precision of the machining tool, one of the most important reasons is that it is difficult to achieve online detection and feedback of the surface quality of ferromagnetic parts during the machining process. The surface morphology of ferromagnetic material parts is related to the service performance, fatigue resistance and even the life of the entire part. Therefore, the detection of ferromagnetic material surface morphology is very important. At present, the technical method...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/82
CPCG01N27/82
Inventor 刘世伟孙燕华张驰姜宵园
Owner HUAZHONG UNIV OF SCI & TECH
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