Laser ultrasonic detection device and detection method for large member nondestructive testing

A non-destructive testing, laser ultrasonic technology, applied in the direction of using sound wave/ultrasonic wave/infrasonic wave to analyze solids, instruments, analysis materials, etc. It can solve the problems of short ultrasonic propagation distance, fast attenuation, small action area, etc.

Pending Publication Date: 2018-07-31
ENG UNIV OF THE CHINESE PEOPLES ARMED POLICE FORCE +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the excitation light source in the laser ultrasonic detection technology usually gathers the laser beam into a point light source, a line light source or a circular light source, which generally has the disadvantages of sma...

Method used

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  • Laser ultrasonic detection device and detection method for large member nondestructive testing
  • Laser ultrasonic detection device and detection method for large member nondestructive testing
  • Laser ultrasonic detection device and detection method for large member nondestructive testing

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Embodiment Construction

[0070] Such as figure 1 and figure 2 As shown, the laser ultrasonic testing device for nondestructive testing of large components of the present invention includes a power supply 15, a housing 1, an optical system and a control system, and the power supply 15, the optical system and the control system are all arranged in the housing 1, and the The front end of the housing 1 is a laser light outlet 2. The optical system includes a laser and lens group module 7, a total reflection mirror 8 and a two-dimensional galvanometer 9. The laser and lens group module 7 is arranged in the middle of the lower part of the housing 1. At the front position, the total reflection mirror 8 is arranged in front of the laser and the lens group module 7, and the two-dimensional vibrating mirror 9 is arranged above the total reflection mirror 8; as image 3 As shown, the laser and lens group module 7 includes a base plate 7-1 and a housing, and the base plate 7-1 is provided with a laser component...

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Abstract

The invention discloses a laser ultrasonic detection device for large member nondestructive testing. The laser ultrasonic detection device comprises a power source, a shell, an optical system and a control system, a laser light outlet is formed in the front end of the shell, and the optical system comprises a laser device and lens set module, a total reflection mirror and a two-dimensional galvanometer; the laser device and lens set module comprises a baseboard, a housing, a laser device assembly, a varifocus lens set and a direct current motor; the laser device assembly comprises a laser device, a polarized beam mirror, an attenuation slice and a light reflex detector, and the two-dimensional galvanometer comprises an X-axis galvanometer, an X-axis motor, a Y-axis galvanometer and a Y-axis motor; the control system comprises a galvanometer driving control board, an X-axis driving circuit board, a Y-axis driving circuit board and a laser control board. The invention further discloses alaser ultrasonic detection method applicable to large member nondestructive testing. The laser ultrasonic detection device is novel and reasonable in design, convenient to carry, easy to maintain andconstant in energy, a large area can be detected in a single time, the efficiency is greatly improved, the practicability is high, and the laser ultrasonic detection device is convenient to apply andpopularize.

Description

technical field [0001] The invention belongs to the technical field of nondestructive testing, and in particular relates to a laser ultrasonic testing device and a testing method for nondestructive testing of large components. Background technique [0002] Ultrasonic testing has the advantages of high sensitivity, strong penetrating power, convenient operation, and no pollution. It can reliably detect many defects in structures, and has become the main research direction of nondestructive testing. With the continuous development of laser technology and ultrasound, the research on laser excitation of sound waves in objects has become increasingly mature, forming laser ultrasound technology. In recent years, laser ultrasonic technology has been widely used in technical fields such as ultrasonic signal propagation, medium characteristic research, non-destructive testing and evaluation research, and has formed an important subject area - laser ultrasonic testing technology. Las...

Claims

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Application Information

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IPC IPC(8): G01N29/04
CPCG01N29/04G01N2291/023
Inventor 单宁刘霞
Owner ENG UNIV OF THE CHINESE PEOPLES ARMED POLICE FORCE
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