Agile unDT device for scanning metallurgical objects comprising a dual EMAT / laser pulse matrix array
By employing an agile dual EMAT/laser pulse matrix array on metallurgical objects, the problems of low resolution, high noise, and high cost in existing technologies have been solved, achieving high-resolution A-Scan and B-Scan under high-temperature conditions, which is suitable for 3D steel plate scanning in the metallurgical industry.
CN117295944BActive Publication Date: 2026-07-14STELMA GMBH
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- STELMA GMBH
- Filing Date
- 2022-03-14
- Publication Date
- 2026-07-14
Smart Images
Figure CN117295944B_ABST
Abstract
A UNDT device (1) comprising a dual EMAT / laser pulse matrix array for ultrasonic scanning and identification of discontinuities (D) in electrically conductive metal objects (2), the device comprising a) a pulsed laser input source (4) generating a pulsed laser input beam (ILB); b) a matrix multi-beam laser emitter comprising i) a mechanical beam steering device (17, 17a) configured to be impacted by the laser input beam (ILB) and periodically diffract it into secondary laser beams (18, 18a, 18b, 18c), and ii) a mechanical beam hopping device (19) impacted by the secondary laser beams and periodically diffract them into n pulsed laser output beams (OLBk) and focus these beams onto n pulse points (SPk) located at the center of n pulse elements (EPk) of a periodic laser pulse array (LEA); and c) a receiver assembly (SE) consisting of EMAT receivers (Emi) arranged into n sensor groups (SGi) arranged in n detection elements (RWi) of a periodic EMAT receiver array (ERA). The spatial periodicity (8, 7) and the size (n) of the laser pulse array (LEA) and the EMAT receiver array (ERA) are equal.
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