A nondestructive testing method for surface hardness of ferromagnetic material based on magnetostrictive guided wave transducer curve
By using EMAT sensor configuration and guided wave transduction curves, the problem that traditional hardness testing methods cannot achieve non-destructive testing of complex structures is solved. This enables non-contact, accurate hardness prediction, which is suitable for non-destructive testing of complex structures.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- INNER MONGOLIA AUTONOMOUS REGION SPECIAL EQUIP INSPECTION & RES INST
- Filing Date
- 2026-04-20
- Publication Date
- 2026-07-17
AI Technical Summary
Traditional hardness testing methods are contact-based and cannot meet the requirements for full-size, full-surface non-destructive testing of complex structural parts. Furthermore, the accuracy of electromagnetic methods is easily affected by surface conditions, and there is a lack of hardness mapping models based on magnetostrictive guided waves.
An EMAT sensor configuration with one exciter and one receiver is adopted, with the exciter and receiver sensors arranged independently. The SHO guided wave signal is excited by applying a static bias magnetic field, and the transduction response curve of the guided wave amplitude versus the static bias magnetic field is constructed. Feature parameters are extracted and a mapping model is trained to achieve non-contact hardness prediction.
It achieves non-contact, interference-resistant, and universal hardness testing of complex structures, and is suitable for non-destructive testing of clean or complex-shaped components. It improves the efficiency of testing and the accuracy and versatility of signals. It is suitable for hardness testing of in-service, clean, or complex-shaped components, and has good material versatility and interference resistance.
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