A five-axis laser ultrasonic automatic detection equipment and method

Abstract

The invention discloses a five-axis laser ultrasonic automatic detection device and method, including a five-axis motion platform, an industrial computer, a pulse excitation laser, a laser ultrasonic signal receiver and a control unit; wherein the excitation pulse laser, laser ultrasonic signal receiver , The five-axis motion platform is connected with the industrial computer; the five-axis motion platform includes a translational degree of freedom in the z-axis direction, a translational degree of freedom in the y-axis direction, a swing head in the x-axis direction, and a translational degree of freedom in the x-axis direction. and a workbench with rotation degrees of freedom in the z-axis direction, the swing head is located above the workbench, the pulse excitation laser includes a laser emission head, and the laser emission head is arranged on the swing head. The present invention adjusts the laser three-dimensional scanning path and irradiation direction through the coordinated control of the head swing and the workbench, and can realize efficient and fast laser ultrasonic automatic detection, and can greatly improve the laser ultrasonic detection efficiency and detection accuracy.

Description

technical field [0001] The invention belongs to the field of non-destructive testing, and in particular relates to a five-axis laser ultrasonic automatic testing device and method. Background technique [0002] Non-destructive testing is a method of evaluating structural integrity, continuity, and reliability without destroying the usability of the tested object. It is widely used in the testing of various engineering structural parts. Laser ultrasonic technology is a non-contact, high-precision, non-destructive ultrasonic non-destructive testing technology that uses pulsed laser beams to act on the object to be tested to generate thermoelastic effects and excite ultrasonic waves, and obtain ultrasonic signals based on the principle of optical interference. . Laser ultrasound combines the high precision of ultrasonic detection and the advantages of non-contact optical detection, and has the advantages of high sensitivity and high detection bandwidth at the nanometer level. ...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problems in the background technology, the purpose of the present invention is to provide a five-axis laser ultrasonic automatic detection equipment and method, which can realize complete automation of laser ultrasonic detection under the condition of low cost and high precision, and can detect large-sized and complex structure workpieces. And the detection process does not require manual intervention, which greatly improves the efficiency and accuracy of defect detection

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