Integral laser induction acoustic surface wave defect detection device

Abstract

The invention discloses an integral laser induction acoustic surface wave defect detection device and belongs to the technical field of nondestructive detection. The device comprises a detection head,an optical fiber beam and a detector, wherein a pumping laser emitting hole is formed in the center of one side end surface of the detection head; detection layer holes are uniformly distributed in the peripheral direction of the pumping laser emitting hole; the pumping laser emitting hole of the detection head is connected with a laser source through a corresponding optical fiber in the opticalfiber beam; each detection laser hole of the detection head is connected with corresponding laser sources and corresponding detectors in the optical fiber beam respectively; pumping laser is emitted from the pumping laser emitting hole; detection layer is emitted from the detection layer hole; reflected detection layer is received and transmitted to a corresponding detector through the detection layer hole. The device is capable of acoustic surface waves from laser and performing surface defect detection on a detected object in a laser detection mode, and is high in defect defection efficiencyand further convenient to operate.

Description

technical field [0001] The invention belongs to the technical field of nondestructive testing, and in particular relates to an integrated laser-induced surface acoustic wave defect testing device. Background technique [0002] A surface acoustic wave is a sound wave that propagates on the surface of an object. The high-frequency surface acoustic wave can be formed on the surface of the object by pumping laser irradiation. This surface acoustic wave propagates along the surface of the object, and the propagation of the acoustic wave will change when it encounters a surface defect. By detecting the change of the propagation state of the surface acoustic wave on the surface of the material, it can be obtained Surface defect information. [0003] The existing surface acoustic wave defect detection device uses a beam of pumping laser light and a beam of detection laser light respectively to realize the defect detection in the area between the two beams of light. If other areas n...

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Problems solved by technology

[0003] The existing surface acoustic wave defect detection device uses a beam of pumping laser light and a beam of detection laser light respectively to realize the defect detection in the area between the two beams of light. If other areas need to be detected, the position and direction of the two laser beams need to be moved at the same time. Low efficiency and inconvenient operation

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