Patent
Metallic molten pool internal contour online measurement device and method
TLDR
In this article, a metallic molten pool internal contour online measurement device and method is presented, which consists of an excitation assembly, a receiving assembly and a computer for data analysis and control, and the computer is provided with a dynamic modulation module for dynamically modulating the beam.Abstract:
The invention discloses a metallic molten pool internal contour online measurement device and method. The device comprises an excitation assembly, a receiving assembly and a computer for data analysisand control; the excitation assembly comprises a laser, a beam splitter for dividing a beam emitted by the laser into a plurality of beams, and a plurality of sets of array optical fibers for receiving the plurality of beams respectively; and the computer is provided with a dynamic modulation module for dynamically modulating the beam. With the metallic molten pool internal contour online measurement device and method of the invention adopted, metallic molten pool internal contour online measurement can be realized based on a laser ultrasonic phased array detection technology; and a printingprocess can be adjusted according to a detection result, so that high manufacturing quality of parts can be realized.read more
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Patent
Array ultrasonic focusing imaging correction method for metal additive manufacturing heterogeneous structure
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Laser cladding layer and molten pool morphology presentation method
Li Xiangbo,Li Tao,Zhang Yuanliang,Shi Bowen,Qiuhong Jiang,Wang Dong,Liu Shujie,Liu Weiwei,Zhang Hongchao +8 more
TL;DR: In this article, a laser cladding layer and molten pool morphology presentation method is presented, which can quickly and accurately present the morphology and the profile of the cladding layers and the molten pool.
References
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Patent
Apparatus for detecting defects
TL;DR: In this paper, an apparatus for detecting defects in a railway rail includes a search unit and preferably a roller search unit (RSU) mounted on a test vehicle and in rolling contact with the running surface of the rails to inspect each rail.
Journal ArticleDOI
Cracks measurement using fiber-phased array laser ultrasound generation
TL;DR: In this paper, a phased array laser ultrasound generation system by using fiber optic delivery and a custom-designed focusing objective lens has been developed for crack inspection, which is simulated with finite element method and validated by experiment.
Patent
A method and system for distance gain sizing using phased array systems
TL;DR: In this paper, a distance gain sizing (DGS) method and system using an ultrasonic phased array system was proposed to provide an effective defect size of a detected defect within a test object.
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TL;DR: In this paper, a laser ultrasonic online nondestructive material-increase manufacturing part detection method was proposed to detect metallurgical defects produced during material increase manufacturing process.
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Laser ultrasonic enhanced excitation system based on high-energy fiber array beam transmission and method thereof
TL;DR: In this paper, a laser ultrasonic enhanced excitation system based on high-energy fiber array beam transmission and a method thereof is described, which has the advantages that the structure is simple, realization is easy, and the signal to noise ratio and detection of the laser system can be greatly increased.