Opening natural gas leaking multi-channel monitoring method and light path structure

Abstract

An open natural gas leakage multiplex inspecting method and optical channel configuration, based on semiconductor laser absorbing spectrum method, relates to master case and open long optical channel system. The master case sets with electrical source socket, switch, fan, optical fiber linker and data transmission interface. The master case owns closed infrared semiconductor laser, semiconductor laser controller, phase-locked amplifier,signal generator,data collection disposal and control module, light switch, light switch driving circuit and infrared detector and connects with the locale optics system by optical fiber. Open optical system relates to integral optics telescope and more component angle reflector array and the former owns import optical fiber coupling implement and output optical fiber coupling implement. It achieves the time-sharing inspect of more gas component and more multiplex based on optical fiber distributing configuration of the light switch technology.

Description

technical field [0001] The invention belongs to a gas laser spectrum measuring instrument, in particular to an optical fiber distributed open optical path H based on near-infrared semiconductor laser absorption spectroscopy 2 S and CH 4 Gas concentration multi-channel monitoring method and instrument. Background technique [0002] With the increasing demand for green energy oil and natural gas, the safety of oil and natural gas in the process of exploitation, processing and transportation has attracted great attention, especially for the safety monitoring of natural gas containing hydrogen sulfide, because its hydrogen sulfide composition has a lot of High toxicity and corrosiveness, if there is no sensitive and reliable monitoring device, once leakage occurs, it will seriously endanger the safety of personnel and equipment. [0003] h 2 S is a colorless, highly toxic, flammable acid gas with a relative density of 1.176, which is heavier than air. When hydrogen sulfide is...

AI Technical Summary

Problems solved by technology

At present, the commonly used monitoring instruments are basically point-type instruments based on electrochemical and semiconductor technologies. Although these instruments have sufficient detection sensitivity, they generally have disadvantages such as long response time, easy poisoning, and interference by other gases. Large, and the cost of system equipment required for a large-scale monitoring environment is extremely high, such as transmission pipelines, gas storage stations, etc.

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