Parametric array sound wave and laser speckle detection system and method

Abstract

The invention discloses a parametric array sound wave and laser speckle detection system and a method thereof. The device comprises a laser light source used for forming light spots on a measured object, wherein the control host is used for outputting swept-frequency signals, the parametric array module is used for converting the swept-frequency signals into ultrasonic modulation signals, transmitting the ultrasonic modulation signals into air, restoring the ultrasonic modulation signals to produce sounds and then resonating with a measured object, the camera is used for shooting light spot images on the measured object, and the control host is connected with the parametric array module and the camera. According to the invention, non-contact nondestructive detection can be carried out on most objects (unlimited types and surfaces), and objects, damages and the like below the surfaces of the objects can be detected; the system has the advantages of being simple, high in accuracy, high in detection efficiency, portable, wide in applicability and the like, has application scenes in industries such as industry, agriculture and construction industry, and is wide in application prospect.

Description

technical field [0001] The invention relates to the technical field of nondestructive testing, in particular to a parametric array acoustic wave and laser speckle testing system and a method thereof. Background technique [0002] Non-destructive testing Nondestructive Testing, NDT is a comprehensive application technology involving multiple disciplines. It applies a variety of physical principles and chemical phenomena on the premise of not damaging the performance of the tested object, and tests various engineering materials, parts and structures. The components are effectively inspected and tested to evaluate their continuity, integrity, safety reliability and certain physical properties. Non-destructive testing technology is an indispensable and effective tool for the development of modern industry. To a certain extent, it reflects the level of industrial development of a country, and its importance has been widely recognized worldwide. [0003] As one of the five conven...

AI Technical Summary

Problems solved by technology

[0005] At the same time, in an ultrasonic testing device for building steel structures with the patent number CN201710705050.3, the technology of combining laser and ultrasonic testing is disclosed, but this technology has the following technical defects: First, due to the large transmission loss of ultrasonic waves in the air, the available distance Short; second, there are fewer materials that can effectively resonate with ultrasonic waves through the air and are detected; third, the existing ultrasonic detection speed is slow and the efficiency is low; fourth, the existing ultrasonic detection is only applied to planar objects, and for non-planar The object effect is not ideal

Images