A multiple phase demodulation method for high resolution of the laser scanner.

Area of Science:

• Optics and Photonics
• Signal Processing
• Measurement Science

Background:

• High-frequency signal modulation is crucial for achieving high-resolution distance measurements in laser scanners using phase demodulation.
• Amplifying high-frequency signals presents challenges due to limited frequency bandwidth, impacting signal quality.
• Traditional methods struggle with effective amplification and noise reduction for high-frequency signals.

Purpose of the Study:

• To introduce and validate an intermediate frequency (IF) demodulation method for laser scanner distance measurement.
• To demonstrate the advantages of IF demodulation in overcoming amplification limitations and signal contamination.
• To analyze the performance of the IF demodulation method in both time and frequency domains.

Main Methods:

• Development of an intermediate frequency demodulation technique for laser scanner signal processing.
• Analytical modeling to understand the theoretical underpinnings of IF demodulation.
• Experimental validation to assess the practical performance and benefits of the proposed method.

Main Results:

• The intermediate frequency demodulation method enables high gain amplification of signals.
• IF demodulation significantly reduces signal contamination, leading to improved measurement accuracy.
• Both analytical and experimental results confirm the effectiveness of the IF method in the time and frequency domains.

Conclusions:

• Intermediate frequency demodulation is a superior technique for high-resolution laser scanning distance measurements.
• The proposed method effectively addresses the limitations of direct high-frequency signal amplification.
• IF demodulation offers a robust solution for enhancing laser scanner performance and accuracy.