A synchronous demodulation technology based on sample-and-hold for eddy current sensors.

Area of Science:

• Electrical Engineering
• Sensor Technology
• Signal Processing

Background:

• Traditional synchronous demodulation methods face challenges in suppressing harmonic components and optimizing dynamic range in precision sensors.
• Precision sensors, such as eddy current sensors, require advanced signal processing techniques for accurate measurements.

Purpose of the Study:

• To propose and analyze a novel synchronous demodulation technology based on sample-and-hold for precision sensors.
• To demonstrate the effectiveness of this method in suppressing harmonic distortions and improving sensor performance.

Main Methods:

• Theoretical analysis of the sample-and-hold synchronous demodulation principle.
• Design and testing of a high-precision eddy current displacement sensor prototype utilizing the proposed method.

Main Results:

• The proposed method effectively suppresses harmonic components in the output signal.
• Significant improvement in the dynamic range of precision sensors was observed.
• The demodulation circuit complexity was reduced.

Conclusions:

• The sample-and-hold synchronous demodulation technology offers substantial advantages for precision sensor applications.
• This method presents a promising approach for enhancing sensor accuracy and simplifying hardware design.
• Extensive application prospects exist for this technology in various precision sensing fields.