Development of eight-channel methane gas optical fiber sensing system

Tianyu Zhang; Weiqi Wang; Liancong Gao; Thomas Koscica; David Li

doi:10.1117/12.975660

15 October 2012 Development of eight-channel methane gas optical fiber sensing system

Tianyu Zhang, Weiqi Wang, Liancong Gao, Thomas Koscica, David Li

Proceedings Volume 8417, 6th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment; 84172D (2012) https://doi.org/10.1117/12.975660
Event: 6th International Symposium on Advanced Optical Manufacturing and Testing Technologies (AOMATT 2012), 2012, Xiamen, China

Abstract

This paper introduces an eight-channel methane gas optical fiber sensing system designed for underground coalmine methane gas monitoring. With eight self-designed gas sensor heads, this system can detect the concentration of methane gas at eight locations in a coal mine simultaneously. By wavelength modulation with the DFB laser diode, 1×8 WDM, a self-designed processing circuit, and data processing software, this system features a high sensitivity (10ppb). The response time of the system is less than 6 seconds. Extensive tests have been carried out on the system. It is shown that the performance of the optical fiber sensor system is generally better than conventional methane sensing systems currently in wide use in coalmines. It can be used in the coalmines for multi-point gas detecting using one light source and attendant central processing unit only, resulting in more versatility, reduced cost, and increased perational efficiency.

Citation Download Citation

Tianyu Zhang, Weiqi Wang, Liancong Gao, Thomas Koscica, and David Li "Development of eight-channel methane gas optical fiber sensing system", Proc. SPIE 8417, 6th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment, 84172D (15 October 2012); https://doi.org/10.1117/12.975660

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