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FMCW Laser Fuze Multiple Scattering Model and Accurate Fixed-Distance Algorithm in a Smoke Environment
Chengtian Song1, Ying Cui1, Bohu Liu1
1School of Mechatronical Engineering, Beijing Institute of Technology, Beijing 100081, China.
Sensors (Basel, Switzerland)
|May 8, 2020
Summary
This study addresses challenges in laser fuze targeting within smoke environments. A new multiple scattering model and the correntropy spectral density algorithm improve distance accuracy, achieving an error under 0.15m.
Area of Science:
- Optics and Photonics
- Signal Processing
- Aerospace Engineering
Background:
- Smoke particles degrade laser fuze performance by scattering and absorbing photons.
- Weak target echo signals in smoke hinder accurate distance measurement for laser fuzes.
Purpose of the Study:
- To establish a multiple scattering model for frequency-modulated-continuous-wave (FMCW) laser fuzes in smoke.
- To develop an accurate distance measurement method for FMCW laser fuzes under smoke interference.
Main Methods:
- Developed a multiple scattering model simulating photon multi-path propagation in smoke.
- Applied the correntropy spectral density (CSD) algorithm for signal processing.
- Validated the model and algorithm for fixed-distance measurement.
Main Results:
- The established model accurately simulates photon behavior in smoke.
- The CSD algorithm achieves precise fixed-distance measurements for FMCW laser fuzes.
- Absolute distance error was maintained below 0.15 m in smoke environments.
Conclusions:
- The developed multiple scattering model and CSD algorithm effectively overcome smoke interference for laser fuzes.
- Accurate fixed-distance measurement is achievable even in challenging smoke conditions.
- This research enhances the reliability of laser fuze systems in adverse environments.
