Mouse cage type magnetostrictive longitudinal mode guided wave detection sensor

A technology for detecting sensors and longitudinal modes, which is applied in the use of sound waves/ultrasonic waves/infrasonic waves to analyze solids and other directions, which can solve problems such as exciting ultrasonic guided waves, achieve high magnetostriction coefficient, facilitate installation and disassembly, and increase excitation efficiency.

Active Publication Date: 2018-01-19
北京中盈盘古智能技术有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although the magnetostrictive tape has a certain degree of flexibility, it is difficult to curl it

Method used

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  • Mouse cage type magnetostrictive longitudinal mode guided wave detection sensor
  • Mouse cage type magnetostrictive longitudinal mode guided wave detection sensor
  • Mouse cage type magnetostrictive longitudinal mode guided wave detection sensor

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Embodiment Construction

[0026] According to the above content of the invention, the squirrel-cage magnetostrictive longitudinal mode guided wave detection sensor can provide the following implementation modes.

[0027] In the choice of couplant: (1) Paste the sensor on the surface of the pipeline through epoxy resin, which can carry out long-term effective monitoring; (2) You can also choose the dry coupling method, using the function of flexible coils and clips to adjust the sensor and pressure between pipes.

[0028] The following figures further illustrate the present invention in conjunction with the accompanying drawings and the above embodiments, and the specific implementation examples provided below are only descriptive, not restrictive, and cannot be used to limit the protection scope of the present invention.

[0029] like figure 1 Schematic diagram of the assembly of a squirrel-cage magnetostrictive longitudinal mode guided wave detection sensor. image 3 , Figure 4 It is a schematic d...

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Abstract

The invention discloses a mouse cage type magnetostrictive longitudinal mode guided wave detection sensor. The two ends of each iron cobalt alloy thin strip are embedded into a groove of a toothed rubber layer; and end pressing buckles fix the toothed rubber layer and the plurality of iron cobalt alloy thin strips. The middle section of each iron cobalt alloy thin strip is spin-coated with a curedepoxy resin layer and is used for being in contact with the surface of a measured micro-tube. Two permanent magnetic rings are formed by splicing C-shaped permanent magnets, the two permanent magnetic rings are arranged at the two ends of an iron cobalt alloy cylindrical shell cage in a magnetic pole dissimilar mode and maintain coaxial with the iron cobalt alloy cylindrical shell cage, and the iron cobalt alloy thin strips are subjected to same-direction bias magnetization. A flexible coil is wound at the middle section of the iron cobalt alloy cylindrical shell, and electrical connection isconducted by a coil adapter, so that an alternating magnetic field in the length direction of the measured micro-tube is stimulated or received, and longitudinal mode guided wave is stimulated and received. The mouse cage type magnetostrictive longitudinal mode guided wave detection sensor can realize on-site rapid assembling and disassembling and can perform magnetostrictive guided wave detection on defects.

Description

technical field [0001] The squirrel-cage magnetostrictive longitudinal mode guided wave detection sensor belongs to the field of ultrasonic nondestructive testing technology. It is used to excite and receive longitudinal mode ultrasonic guided waves in small-diameter fine pipes or rods to realize long-distance detection of defects and other damage. Background technique [0002] Magnetostrictive ultrasonic guided wave technology can realize long-distance detection of defects in waveguide structures such as pipelines, steel cables, and storage tank bottom plates. It has become a new type of nondestructive testing technology that has been widely concerned and studied deeply at home and abroad. In recent years, with the use of flexible high-magnetostriction alloy strips, it has become easier to excite specific modes of ultrasonic guided waves in large-diameter pipes and plates. Although the magnetostrictive tape has a certain degree of flexibility, it is difficult to curl it dir...

Claims

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Application Information

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IPC IPC(8): G01N29/07
Inventor 郭文鑫
Owner 北京中盈盘古智能技术有限公司
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