Bendductor-Transformer Steel Magnetomechanical Force Sensor.

Area of Science:

• Magnetism and Magnetic Materials
• Mechanical Engineering
• Sensor Technology

Background:

• Magnetoelastic sensors, leveraging effects like Villari, are crucial for force measurement.
• Existing sensors often face limitations in sensitivity, cost, or hysteresis.
• Optimizing sensor design is key to improving performance and applicability.

Purpose of the Study:

• To design and investigate an innovative force sensor based on the Villari effect.
• To evaluate transducer performance, mitigate measurement hysteresis, and optimize functional parameters.
• To explore signal selection, waveform, and frequency impacts on sensor accuracy.

Main Methods:

• Fabrication of a force sensor using electrical steel in a pressductor pattern operating in bending load mode.
• Experimental research to evaluate performance, hysteresis, and optimize parameters.
• Analysis of supply/measured signals, harmonic content, and current waveforms/frequencies.

Main Results:

• The developed sensor demonstrates high sensitivity and stress sensitivity due to its bending deformation mode.
• Achieved a near-linear characteristic within the 0.5-5 N measuring range.
• Reported a signal-to-noise ratio (SNR) of 46 dB and an uncertainty of 0.11 N.

Conclusions:

• The proposed Villari effect-based force sensor is robust, cost-effective, and highly sensitive compared to other magnetoelastic sensors.
• Optimization of parameters and signal conditions effectively mitigated measurement hysteresis.
• The sensor's performance characteristics make it suitable for precise force measurement applications.