Fluxgate Sensor with Bifactor Excitation Mode.

Area of Science:

• Materials Science
• Non-Destructive Testing (NDT)
• Electromagnetism

Background:

• Conventional magnetic flaw detection requires pre-magnetization of materials.
• Existing NDT methods face limitations in flaw detection accuracy and resolution.
• Accurate flaw detection is crucial for the integrity of magnetic products.

Purpose of the Study:

• To propose a new probe-coil magnetic-field non-destructive testing (NDT) technique.
• To develop an NDT method that does not require pre-magnetization of the test object.
• To enhance the reliability and cost-effectiveness of flaw detection in magnetic products.

Main Methods:

• Theoretical justification of a new bifactor excitation for fluxgate sensors.
• Simultaneous activation of magnetic-modulating and electromagnetic-acoustic effects.
• Design and analysis of a novel fluxgate sensor with bifactor excitation.
• Experimental study of the proposed fluxgate sensor's capabilities.

Main Results:

• The new NDT technique successfully detects flaws without pre-magnetization.
• The bifactor excitation method enhances fluxgate sensor performance.
• Experimental results confirm high resolution, reduced uncertainty, and detection of smaller, deeper flaws.
• The novel fluxgate design offers improved functionality and lower cost.

Conclusions:

• The proposed magnetic-field NDT method offers a significant advancement over conventional techniques.
• The new bifactor excitation fluxgate sensor provides superior flaw detection capabilities.
• This technology promises more reliable and cost-effective inspection of magnetic products.