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Laser ultrasonic nondestructive testing device and method

A non-destructive testing, laser ultrasonic technology, applied in measurement devices, analysis of solids using sonic/ultrasonic/infrasonic waves, material analysis by optical means, etc., can solve problems such as noise interference, improve efficiency, suppress the interference of electrical noise, The effect of expanding the detection range

Pending Publication Date: 2022-04-12
浙江大学温州研究院 +1
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Problems solved by technology

[0004] In order to overcome the deficiencies of the prior art, the present invention provides a laser ultrasonic nondestructive testing device and method, which can effectively solve the problem of noise interference and greatly improve the detection range and detection sensitivity

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  • Laser ultrasonic nondestructive testing device and method
  • Laser ultrasonic nondestructive testing device and method
  • Laser ultrasonic nondestructive testing device and method

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Embodiment Construction

[0032] The present invention will be described in detail below with reference to the specific embodiments shown in the drawings, but these embodiments are not limited to the structures, methods, or functional transformations made by those skilled in the art in accordance with these embodiments. All are included in the scope of the invention.

[0033] See figure 1 A laser non-destructive detection device proposed by the present invention is for damage detection of the tested member 5, including: processing module 1, synchronization signal generating module 2, pulse laser 3, two-dimensional scanning girdry 4, detection module 6 and Data Acquisition Module 7. The pulsed laser 3 transmitting pulse laser is irradiated onto the tested member 5 through the two-dimensional scanning spray girdle 4, and the synchronization signal generating module 2 causes the data acquisition module 7 to acquire detection data at the same time, and outputs the detection by the detection module 6. The signal...

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Abstract

The invention discloses a laser ultrasonic nondestructive testing device which comprises a processing module, a synchronizing signal generation module, a pulse laser, a two-dimensional scanning galvanometer, a detection module and a data acquisition module. According to the invention, non-contact high-precision nondestructive testing can be carried out on the tiny surface cracks of the tested piece. The invention further provides a laser nondestructive testing method, pulse laser irradiates a tested piece and excites an ultrasonic signal in the tested piece, the ultrasonic signal is modulated by a surface crack of the tested piece, and a signal output by the detection module enters the data acquisition module and enters the processing module through a bus. And the processing module analyzes and processes the signal to finally obtain the position and depth information of the defect.

Description

Technical field [0001] The present invention relates to laser ultrasonic lossless detection techniques, and more particularly to a laser ultrasonic lossless detection device and method. Background technique [0002] In modern non-destructive detection technology, ultrasonic detection is high, the sound beam is good, and the defective detection rate such as crack is high, and the applicable brownd is high, and the ultrasound testing technology has become a high-tech industry and modern industrial field. The first choice for non-destructive testing. However, there are many shortcomings in traditional ultrasonic detection, and in harsh environments such as high temperature, high pressure), the research of material microstructure, the measurement of ultra-thin materials, etc., the effectiveness of this technology is greatly reduced, and laser ultrasound due to its non- Contact, the advantages of high spatial resolution are well compensated for these shortcomings. [0003] Common lase...

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Application Information

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IPC IPC(8): G01N21/17G01N21/01G01N29/04
Inventor 王道档朱东旭杨世锡何俊程启超洪伟荣
Owner 浙江大学温州研究院
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