Research on the measurement of CH4 concentration based on dual-band weighted combination model

Li, Honglian; Li, Wenduo; Yan, Xiangyu; Lü, Heshuai; Wang, Fan; Fang, Luyuan

doi:10.1007/s11801-021-1073-7

Cited by 1 publication

(1 citation statement)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The lock-in amplifier of this device is an SR860 (SRS, Sunnyvale, CA, USA), which has a bandwidth of 500 kHz, low-noise voltage and current input, and high-bandwidth output, and it can provide a 20 Hz scanning signal to the laser. The data acquisition module is specifically used to collect the second harmonic peak signal output by the lock-in amplifier in the TDLAS methane-measurement system and transmit it to the host computer, while the host computer’s software converts the second harmonic peak value into methane-concentration information and displays it [ 21 ]. The side view of the constructed experimental measurement platform and the used measuring instruments is shown in Figure 4 a, the top view of the experimental measurement platform is shown in Figure 4 b, and the actual setup of the entire system is shown in Figure 4 c.…”

Section: Methane Detection Based On Tdlasmentioning

confidence: 99%

Research on Methane Measurement and Interference Factors in Coal Mines

Cui

Tong

et al. 2022

Sensors

View full text Add to dashboard Cite

The detection of methane has always been an important part of coal mine safety. In order to improve the methane measurement accuracy in coal mines and to determine the influence of environmental interference factors on the measurement results, we designed a spherical, experimental chamber simulating the on-site environment of an underground coal mine containing methane, in which various environmental interference factors can be superimposed. The simulation chamber can generate a uniform and controllable dust environment, a controllable methane environment with concentrations below that which would trigger an alarm, controllable humidity, and environments characterized by other interference factors. Based on computational simulations of the experimental chamber with varying dust-particle-concentration distributions using a single particle size, an optimal design for the chamber has been realized in terms of the rapid mixing of dust and the flow field. Finally, we constructed an underground methane concentration measurement system for coal mines and assessed the influences of different dust concentrations and relative humidity values on the performance of methane measurements, providing a means for improving the measurement accuracy of underground coal mine, spectral, absorption-type methane sensors.

show abstract

Section: Methane Detection Based On Tdlasmentioning

confidence: 99%