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Ultrasonic guided wave combined type nondestructive testing method and ultrasonic guided wave combined type nondestructive testing device

An ultrasonic guided wave, non-destructive testing technology, applied in the direction of material analysis using sonic emission technology, can solve problems such as unsatisfactory excitation effect, low detection sensitivity of reflected echo, and large ultrasonic guided wave attenuation.

Inactive Publication Date: 2010-03-10
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

However, piezoelectric ceramic guided wave detection has technical defects such as unsatisfactory excitation effect, large ultrasonic guided wave attenuation, and relatively short actual detection distance in the process of ultrasonic guided wave excitation; and magnetostrictive guided wave detection technology, for The detection sensitivity of reflected echo is low, and the application effect is not ideal

Method used

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  • Ultrasonic guided wave combined type nondestructive testing method and ultrasonic guided wave combined type nondestructive testing device

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Embodiment 1

[0049] Embodiment 1 (with reference to Figure 1~6 )

[0050] An ultrasonic guided wave composite non-destructive testing method, which uses ultrasonic guided waves to propagate in the object to be tested, and detects the object to be tested by detecting reflected echoes 902; the points that need to be emphasized are:

[0051] The method used to excite and generate ultrasonic guided waves is an electromagnetic excitation method; the electromagnetic excitation method used to excite ultrasonic guided waves is specifically a composite excitation of magnetostrictive excitation and electromagnetic ultrasonic excitation; it receives reflection The method of the echo 902 is specifically a method of detection using a piezoelectric device.

[0052] In the ultrasonic guided wave composite nondestructive testing method, the components used to excite the ultrasonic guided wave and the piezoelectric device used to receive the reflected echo 902 are separately arranged separately (such as ...

Embodiment 2

[0076] The content of this embodiment is basically the same as that of Embodiment 1, and its difference mainly lies in:

[0077] 1) The electromagnetic excitation method for exciting the ultrasonic guided wave is specifically one of the following two types: magnetostrictive excitation, electromagnetic ultrasonic (EMAT) excitation;

[0078] 2) In the ultrasonic guided wave composite non-destructive testing method, the components used to excite the ultrasonic guided wave and the piezoelectric device used to receive the reflected echo 902 are fixed together to form a As a whole, the whole is referred to as a detection probe ring 1 . The quality of the ultrasonic guided wave generated by electromagnetic excitation is high, and the piezoelectric device is used to detect the high sensitivity of vibration; the combination of these two characteristics can obtain better technical results.

[0079] 3) The electromagnetic excitation method can specifically use a single electromagnetic e...

Embodiment 3

[0087] The content of this embodiment is basically the same as that of Embodiment 1, and its difference mainly lies in:

[0088] 1) In the ultrasonic guided wave composite non-destructive testing method, the piezoelectric sensor receiving array 7 used includes 512 piezoelectric receiving units; these piezoelectric receiving units can be made into various specific array forms to facilitate more Good reception of reflected echo 902 signal.

[0089] 2) The detected component is a large-diameter oil and gas pipeline.

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Abstract

The invention provides an ultrasonic guided wave combined type nondestructive testing method. The method tests an object to be tested by allowing ultrasonic guided waves to transmit in the object to be tested and then testing reflection echo, and is characterized in that: the method for generating the ultrasonic guided wave by excitation adopts an electromagnetic excitation mode; and the mode of receiving the reflection echo is using a piezoelectric element for testing. The invention also claims the protection of the testing device corresponding to the ultrasonic guided wave combined type nondestructive testing method. The device of the invention can realize the defect test at greater distance and with higher sensitivity under a condition that the prior pipeline has a damping effect on theultrasonic guided wave. The technique can be used for nondestructive testing of components such as common pipes, steel rails, special pipes / rods, wire ropes, tank bottoms of oil tanks and the like. The method of the invention creatively combines two big technical advantages, so that the method has more obvious and better technique effect, and predicable huge economic values and social values.

Description

technical field [0001] The invention relates to the technical field of nondestructive testing, and in particular provides a composite ultrasonic guided wave nondestructive testing method capable of quickly and accurately detecting defects in structures over a long distance or in a large area. Background technique [0002] In petroleum, chemical and other industrial fields, various pipes and pipelines are widely used. Especially in petrochemical plants and oil and gas transmission stations, various pipelines laid on the ground and underground are likely to cause corrosion on the inner and outer surfaces of the pipe wall due to the corrosiveness of the medium inside the pipe or the corrosive environment outside the pipe. Even lead to catastrophic accidents or cause serious environmental pollution. [0003] Therefore, regular detection and targeted maintenance of pipelines are the necessary prerequisites to ensure the safe operation of pipelines. However, many pipelines are u...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N29/14
Inventor 蔡桂喜董瑞琪刘畅周庆祥
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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