SLS-based metal surface crack detection system

Abstract

The invention relates to an SLS-based metal surface crack detection system, which comprises a transmitting module, a receiving module, a three-dimensional mobile platform and a control module, and ischaracterized in that a detected workpiece is placed on the three-dimensional mobile platform; the transmitting module comprises a high-frequency optical fiber pulse ultrasonic laser, a scanning galvanometer mechanism and a gathering mirror, and the high-frequency optical fiber pulse ultrasonic laser excites a beam of pulse ultrasonic laser to be reflected by the scanning galvanometer mechanism and then excited on a measured workpiece through the gathering mirror; the receiving module comprises a plurality of piezoelectric sensors, a charge amplifier and a high-speed data acquisition card; thepiezoelectric sensors are arranged around the surface of a measured workpiece; signals acquired by the piezoelectric sensors are connected with the high-speed data acquisition card through the chargeamplifier to complete real-time acquisition of the signals. Compared with the prior art, the method has the advantage that the metal surface cracks can be accurately and efficiently detected withoutdamage.

Description

technical field [0001] The invention relates to the field of non-destructive detection of metal surface cracks, in particular to an SLS-based metal surface crack detection system. Background technique [0002] With the development of industrial modernization, metal parts are widely used in many important fields such as aerospace, energy and chemical industry, transportation, weaponry, production equipment, etc. Metal parts will be subjected to high temperature, high pressure, high load and corrosion during their service Harsh environmental influences such as radiation and radiation will cause defects such as cracks on the surface of metal parts. If the defects cannot be identified in a timely and effective manner and necessary measures are taken, the defects will further develop and eventually lead to the failure of the parts. The failure of metal parts seriously reduces the stability and reliability of equipment, and may even lead to highly dangerous and destructive acciden...

AI Technical Summary

Problems solved by technology

[0002] With the development of industrial modernization, metal parts are widely used in many important fields such as aerospace, energy and chemical industry, transportation, weaponry, production equipment, etc. Metal parts will be subjected to high temperature, high pressure, high load and corrosion during their service Harsh environmental influences such as radiation and radiation will cause defects such as cracks on the surface of metal parts. If the defects cannot be identified in a timely and effective manner and necessary measures are taken, the defects will further develop and eventually lead to the failure of the parts

The failure of metal parts seriously reduces the stability and reliability of the equipment, and may even lead to highly dangerous and destructive accidents, resulting in huge economic loss and endangering people's lives

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