Nan Gao, Yongbo Yu, Zhenhui Du, Jinyi Li, Zhaozong Meng, Zonghua Zhang. Research on harmonic detection pressure inversion based on Gauss/Lorentz line fitting ratio (invited)[J]. Infrared and Laser Engineering, 2023, 52(8): 20230428
- Infrared and Laser Engineering
- Vol. 52, Issue 8, 20230428 (2023)
Fig. 1. Simulation curve: (a) The original Lorentz function accounts for 5% of the total peak width; (b) The original Lorentz function accounts for 95% of the total peak width
Fig. 2. Fitting curve of pressure and Y
Fig. 3. Curve comparison of pressure and Y after adding the laser linewidth
Fig. 4. Curve comparison of pressure and Y after adding white noise with different amplitude coefficients
Fig. 5. When the frequency is 0.1 times the signal frequency, the curve comparison of pressure and Y after adding background interference of different amplitudes
Fig. 6. Curve comparison of the pressure and Y after adding background interference of different frequencies
Fig. 7. The effect of background frequency changes on mathematical models
Fig. 8. Gauss fitting and Lorentz fitting curves under different pressures
Fig. 9. The fitting curve of measured pressure and Y
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Table 1. The standard deviation of three eigenvalues of the same spectral line in different noise and background
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