A method and system for trace detection of hydrogen gas
By designing a dual-FP cavity co-source optical path structure and a Pd-Ag/WO3 composite hydrogen-sensitive membrane, the problems of large size and susceptibility to temperature interference in hydrogen detection equipment have been solved, achieving high sensitivity and real-time visualization of trace hydrogen detection, and adapting to a wide temperature range environment.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- BEIJING UNIV OF CIVIL ENG & ARCHITECTURE
- Filing Date
- 2026-04-17
- Publication Date
- 2026-07-17
AI Technical Summary
Existing hydrogen detection equipment is bulky and inconvenient to carry. The single sensor structure is susceptible to temperature interference, which leads to a decrease in detection accuracy. The lack of an integrated signal demodulation link makes it difficult to achieve real-time visualization output, thus failing to meet the needs for rapid detection of trace amounts of hydrogen.
A dual-FP cavity co-source optical path structure is adopted. Hydrogen response is achieved by setting a Pd-Ag/WO3 composite hydrogen-sensitive film in the first FP cavity, and nitrogen is filled in the second FP cavity to build a temperature compensation structure. The electrical signal is converted by a photodiode and demodulated by a SoC to achieve decoupling of temperature and hydrogen response and real-time visualization output.
It achieves high sensitivity and resistance to temperature interference in trace hydrogen detection, and features system miniaturization, real-time visualization output, adaptability to wide temperature range environments, and continuous real-time processing and on-site interpretation capabilities.
Smart Images
Figure CN122409583A_ABST