A trapezoidal wave dwell scanning method applied to a laser gas detection system
By setting a stationary segment at the center of the gas absorption peak using the trapezoidal wave stationary scanning method, the problems of insufficient signal-to-noise ratio and anti-interference capability in the traditional half-wave scanning method are solved, achieving high signal-to-noise ratio and environmental adaptability, and improving the accuracy and stability of gas concentration measurement.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- GUILIN UNIV OF ELECTRONIC TECH
- Filing Date
- 2026-05-22
- Publication Date
- 2026-07-17
AI Technical Summary
Traditional half-wave scanning methods struggle to balance the ability to identify wavelength drift with high stability against transient environmental interference, resulting in decreased signal-to-noise ratio and inaccurate concentration inversion.
The trapezoidal wave stationary scanning method is adopted. By setting a stationary segment at the center of the gas absorption peak, a continuous and piecewise linear scanning drive signal is generated, and a high-frequency sinusoidal modulation signal is superimposed to extend the effective integration time and improve the signal-to-noise ratio.
Without increasing the system response period, the signal-to-noise ratio and resistance to transient environmental interference are significantly improved, ensuring the accuracy and robustness of gas concentration measurement.
Smart Images
Figure CN122409578A_ABST