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Electromagnetic ultrasonic probe with variable structure

An electromagnetic ultrasonic, variable technology, applied in the direction of using ultrasonic/sonic/infrasonic waves, using sonic/ultrasonic/infrasonic waves to analyze solids, and using sonic/ultrasonic/infrasonic waves for material analysis, etc. and other problems to achieve the effect of flexible use

Inactive Publication Date: 2014-04-23
XIAMEN UNIV
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  • Claims
  • Application Information

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Problems solved by technology

[0003] Chinese patent CN102023186A "Electromagnetic Ultrasonic Probe and Method for Using the Electromagnetic Ultrasonic Probe to Detect Pipelines" discloses an ultrasonic probe that detects defects on the detection object by means of electromagnetic ultrasonic technology. However, since the ultrasonic waves generated by the probe are surface waves, only Defect detection is performed on the inner wall surface of the pipeline, and another set of detection devices must be replaced for the detection of internal defects, which increases the cost and complexity of detection

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  • Electromagnetic ultrasonic probe with variable structure
  • Electromagnetic ultrasonic probe with variable structure
  • Electromagnetic ultrasonic probe with variable structure

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Embodiment Construction

[0024] The present invention will be further described below in conjunction with the accompanying drawings and embodiments. refer to figure 1 , the present invention provides an electromagnetic ultrasonic probe with a variable structure, including a probe interface 1 , an anti-interference shield 2 , a bias magnetic field 3 , a lever 4 , an EMAT coil 5 , and a connecting wire 7 . The bias magnetic field 3 is provided by a periodic magnet, and the periodic magnet is formed by splicing four equal and large square N42-type RuFeB.

[0025] In this embodiment, the EMAT coil 5 is printed on a 0.5mm thick PCB, the line spacing S2=1.25mm, and the line width is 0.3mm. There are 2 wires under a single square N42 type RuFeB; the winding method is as follows figure 2 shown. The EMAT coil 5 is placed under the periodic magnet and placed in the anti-jamming shield 2 . The driving rod 4 is inserted into the sliding sleeve, and the sliding sleeve and the anti-interference shielding cover...

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Abstract

The invention provides an electromagnetic ultrasonic probe with a variable structure. The electromagnetic ultrasonic probe comprises an anti-interference shielding cover, a probe interface, a deflector rod, a bias magnetic field and an EMAT (Electro Magnetic Acoustic Transducer) coil, wherein the anti-interference shielding cover covers the bias magnetic field and the EMAT coil; the anti-interference shielding cover is mechanically connected with the probe interface which is electrically connected with the EMAT coil through a lead; the probe interface is used for introducing an external excitation signal; the EMAT coil is used for exciting an ultrasound signal; the bias magnetic field is provided by a periodic magnet and is arranged above the EMAT coil; the EMAT coil is of a folding line type coil structure, the distances S1 between every two adjacent leads are the same, the periodic magnet can horizontally move at the displacements S2 above the EMAT coil through the deflector rod, and S1=S2. The aim of detecting different kinds of defects is realized by exciting in various ultrasound modes through the same probe structure.

Description

technical field [0001] The invention relates to a probe, in particular to an electromagnetic ultrasonic probe. Background technique [0002] In recent years, with the development of the oil and natural gas industry, coupled with the imbalance of energy supply in some areas, long-distance oil and gas transportation has been born. However, the pipelines used for transportation are operated in harsh environments all the year round, and are prone to defects such as corrosion and cracks, which seriously affect the safe operation of the pipelines. Pipeline detection is of great significance to the petroleum industry, chemical industry, pressure vessel industry, and oil and gas high-pressure long-distance transmission projects. Among many non-destructive testing technologies, electromagnetic ultrasonic testing technology is very suitable for the detection of high temperature, high speed and rough surface workpieces because it does not require coupling medium and can measure non-co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N29/24G01N29/04G01B17/02
Inventor 吴德会游德海杨秀淼李超
Owner XIAMEN UNIV
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