一种基于开放光路可调衰荡腔的气体温度及浓度测量方法
By utilizing time-domain fitting and frequency-domain iterative correction of an tunable attenuation cavity in an open optical path, the problem of gas concentration and temperature measurement accuracy under the influence of aerosols was solved, achieving high-precision measurement without the need for calibration equipment.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- BEIHANG UNIV
- Filing Date
- 2023-08-10
- Publication Date
- 2026-07-17
AI Technical Summary
Existing gas concentration measurement methods require the introduction of complex calibration equipment or standard gases, which increases system complexity and introduces errors. Furthermore, aerosols have a significant impact on open cavity measurements, leading to a decrease in measurement accuracy.
A method based on an open optical path tunable ring-down cavity is adopted to reduce the influence of aerosol anomalous extinction through time-domain fitting. A ring-down signal is generated by matching the mode of the tunable laser with the ring-down cavity, and the attenuation coefficient is corrected by frequency-domain iteration, so as to realize calibration-free measurement of gas temperature and concentration.
The simplified measurement system structure avoids gas sampling losses, reduces system energy consumption, improves gas distribution uniformity and measurement accuracy, and realizes high-precision gas temperature and component concentration measurement under the influence of aerosols.
Smart Images
Figure CN117030638B_ABST