A fiber optic methane sensor based on wavelength adaptive vertical cavity surface emitting laser without thermoelectric cooler

Li, Yanfang; Chang, Lin; Zhao, Yuejin; Meng, Xiangjun; Wei, Yubin; Wang, Xiaosong; Yue, Jianling; Liu, Tongyu

doi:10.1016/j.measurement.2015.09.044

Cited by 12 publications

(4 citation statements)

References 8 publications

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“…Thus, VCSEL has higher current-wavelength tuning characteristics than the DFB laser. Moreover, the wavelength modulation coefficient of VCSEL is smaller by temperature modulation and larger by current modulation [35]. With the development of long-wavelength VCSEL technology, the research on gas detection technology based on low-power VCSEL has become very attractive [36,37].…”

Section: Laser Methane Sensor and Applications To On-line Monitoring ...mentioning

confidence: 99%

Recent advances in laser gas sensors for applications to safety monitoring in intelligent coal mines

Gong

Wang

et al. 2022

Front. Phys.

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Due to the extremely complex working conditions, various health and safety hazards are present in underground coal mines, which cause economic losses and heavy casualties. Among these hazards, methane gas explosion and coal combustion are recognized as the two major hazards to miners. Traditional electronic sensors in mine safety monitoring systems have problems such as low precision, a large amount of maintenance, and monitoring dead zones. In the past decade, gas sensors based on tunable diode laser absorption spectroscopy (TDLAS) have been extensively studied and tailored for use in the coal mine industry because of their advantages of high sensitivity, high stability, fast response, intrinsic safety, and remote monitoring. This invited paper introduces the recent progress and typical applications of TDLAS-based methane sensors, carbon monoxide sensors, and multi-gas monitoring systems in coal mine gas monitoring, fire prevention, and early warning in intelligent coal mines.

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Section: Laser Methane Sensor and Applications To On-line Monitoring ...mentioning

confidence: 99%

Recent advances in laser gas sensors for applications to safety monitoring in intelligent coal mines

Gong

Wang

et al. 2022

Front. Phys.

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“…The dust has little effects on the sensors under the protection cover of the probe, and the displayed values of the sensors were stable. 15 Jiang et al reported a multilayer fiber optic sensor with an outer layer of silicalite. The pore opening, which was uniform sub-nanometer sized, can reduce the deposition of fine particles or large contaminating molecules on a fiber core.…”

Section: Introductionmentioning

confidence: 99%

“…Li et al proposed a methane detection technique based on surface emitting laser. The dust has little effects on the sensors under the protection cover of the probe, and the displayed values of the sensors were stable 15 . Jiang et al reported a multilayer fiber optic sensor with an outer layer of silicalite.…”

Section: Introductionmentioning

confidence: 99%

Development of electrospun filter with high efficiency to reduce disturbance on gas detection in dusty environments

Zhao

Guo

Han

et al. 2023

J of Applied Polymer Sci

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In some harsh environments, certain gases are very important for the safety, such as methane gas from underground coal mines, which may explode causing catastrophic consequences. However, such gas detections are often disturbed by the particles. In this study, aiming at the scenario of underground coal mines, electrospun filters were developed and used as the pre‐filter of electronic nose (PFEN) to mitigate the disturbance on gas detection in dusty environments. Two poly (ε‐caprolactone) (PCL) filters and four poly (ε‐caprolactone)/graphene oxide (PCL/GO) filters have been prepared and compared with two commercial filters. The results shows that all filters did not affect the response of sensors to the detecting gas as compared with that without filters. The PCL/GO filter at GO concentration of 0.03% (PCL/GO‐3) had the best performance. The PCL/GO‐3 filter exhibited high removal efficiency of particulate matter (PM) with 99.27% (PM1), 99.67% (PM2.5), and 99.90% (PM10), low pressure drop of 75 Pa, and highest quality factor of 0.076 as compared with other filters. In addition, the PCL/GO‐3 filter exhibited higher tensile strength than those of other electrospun filters and commercial filters. These results indicate that the electrospun filters can be excellent option to be used as PFEN for mitigating PM deposition for gas detection in dusty environments.

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“…Shuqian Shen et al proposed a modified W MS − 2 f /1 f method to improve the stability of the methane telemetry system, which showed good performance with a response time of 0.57 s at a distance of 10 m [15]. However, these gas telemetry sensors implement WMS and lock-in amplifiers to optimize gas sensitivity, leading to disadvantages such as slow response speed, large sensor size, and high cost [16,17]. These factors make it challenging for these sensors to adapt to the field of high-speed gas measurements for purposes such as UAV gas detection, vehicle-mounted detection, and handheld telemetry devices.…”

Section: Introductionmentioning

confidence: 99%

Highly Responsive, Miniaturized Methane Telemetry Sensor Based on Open-Path TDLAS

Wu,

Yang,

Shi

et al. 2023

Photonics

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This paper proposes the design of a highly responsive, compact, non-contact methane telemetry sensor, employing the open-path tunable diode laser absorption spectroscopy (OP-TDLAS) technology. The sensor uses the dual-core structure of FPGA and ARM to achieve high-speed methane telemetry at 100 KHz repeated modulation frequency for the first time with a non-cooperate target, and a higher gas responsive time of 1.8 ms was achieved than previously reported. Moreover, the optical system (L × W × H: 68.8 × 52 × 62.7 mm) and the electronic system (L × W: 70 × 50 mm) make the sensor more compact. Methane gas samples of varying integral concentrations were examined at a distance of 20 m. The amplitude of the absorption peaks was subjected to a linear fit with the standard concentration values, resulting in a robust linear correlation coefficient (R2 = 0.998). Notably, despite the compact form factor of the methane sensor, it demonstrated commendable stability in gas concentration detection, offering a minimum detection limit of 43.14 ppm·m. Consequently, this highly responsive and compact methane sensor, with its open-path feature, is apt for integration into a variety of applications requiring such attributes. These include handheld telemetry devices, Unmanned Aerial Vehicle (UAV) gas detection systems, vehicle mounted gas detection, and laser gas radar.

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A fiber optic methane sensor based on wavelength adaptive vertical cavity surface emitting laser without thermoelectric cooler

Cited by 12 publications

References 8 publications

Recent advances in laser gas sensors for applications to safety monitoring in intelligent coal mines

Recent advances in laser gas sensors for applications to safety monitoring in intelligent coal mines

Development of electrospun filter with high efficiency to reduce disturbance on gas detection in dusty environments

Highly Responsive, Miniaturized Methane Telemetry Sensor Based on Open-Path TDLAS

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