Design and characterization of long path absorption cell and digital lock-in amplifier for multi-channel infrared gas sensor

Pai Jiang; Yunbo Zhang; Yuhao Qian; Aolong Sun; Kaiyuan Wang; Lingjie Li; Kaiyun Cao; Jianjun Lai

doi:10.1117/12.2626593

20 January 2022 Design and characterization of long path absorption cell and digital lock-in amplifier for multi-channel infrared gas sensor

Pai Jiang, Yunbo Zhang, Yuhao Qian, Aolong Sun, Kaiyuan Wang, Lingjie Li, Kaiyun Cao, Jianjun Lai

Author Affiliations +

Proceedings Volume 12154, 13th International Photonics and OptoElectronics Meetings (POEM 2021); 121540N (2022) https://doi.org/10.1117/12.2626593
Event: 13th International Photonics and OptoElectronics Meetings (POEM 2021), 2021, Wuhan, China

Abstract

A high-precision three-gas detection system based on non-dispersive infrared (NDIR) technique was designed to accurately detect multiple gas concentrations in a complex environment. This system consists of an infrared source, a quad channel pyroelectric detector, a signal processing circuit and an optical gas chamber. A multiplexed digital lock-in amplification algorithm based on MCU was realized to improve accuracy, it has low cost of multiplex, there is potential to be applied to the measurement of multi-channel data. And a compact gas cell with the size of 40mmx110mmx22mm was designed, in which the average optical path length is 475mm. Initial measurement was done to one channel for SF6 gas concentration, and the feasibility of gas cell structure and signal processing circuit was demonstrated.

Citation Download Citation

Pai Jiang, Yunbo Zhang, Yuhao Qian, Aolong Sun, Kaiyuan Wang, Lingjie Li, Kaiyun Cao, and Jianjun Lai "Design and characterization of long path absorption cell and digital lock-in amplifier for multi-channel infrared gas sensor", Proc. SPIE 12154, 13th International Photonics and OptoElectronics Meetings (POEM 2021), 121540N (20 January 2022); https://doi.org/10.1117/12.2626593

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available