Method and device for designing methane detection module based on vertical cavity surface emitting laser device

Abstract

The invention discloses a method and device for designing a methane detection module based on a vertical cavity surface emitting laser device (VCSEL). The method includes the steps that a plurality oftemperature ranges are set in advance, and in each temperature range, the wavelength scanning range of the laser device covers at least two methane absorption peaks; according to the measured environment temperature, the methane absorption peak corresponding to the measured environment temperature range is automatically matched to measure the concentration of methane. Through close cooperation with a VCSEL supplier, the laser device (VCSEL) with performance indexes meeting the above requirements is screened out, and the methane absorption peak center wavelength and a laser parameter design scheme are automatically matched into the methane detection module precisely, so that the method for designing the newly designed methane detection module can effectively work in the environment temperature range between -20 DEG C and 60 DEG C.

Description

technical field [0001] The invention relates to the technical field of laser spectrum analysis, in particular to a method and device for designing a methane detection module based on a vertical cavity surface emitting laser. Background technique [0002] In China, the adoption of gas drainage measures not only solves the threat of coal mine gas accidents and ensures the safety of coal mines, but also provides resources for the development and utilization of gas. With the integration and development of coal technology and information technology, gas monitoring system has been widely promoted and applied in coal mine production and plays an extremely important role. According to the national safety regulations, the coal mine gas drainage system must monitor the environmental gas of the drainage pumping station, the monitoring of the drainage flow, the monitoring of the concentration of the drainage gas, the monitoring of the temperature, and the monitoring of the pipeline pres...

AI Technical Summary

Problems solved by technology

Since the wavelength of the DFB laser changes with temperature, it is necessary to add a temperature control device next to the laser to compensate for the influence of external temperature changes, resulting in a significant increase in power consumption of the overall module

Especially under the environmental conditions with a large working temperature difference (-20° to 60°), the efficiency of the temperature control device to compensate the temperature will be affected by the temperature change; at the same time, considering the influence of high pressure on the gas absorption spectrum, the distribution feedback Tunable laser absorption spectroscopy technology TDLAS with DFB laser as its light source is limited

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