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

A natural gas, open technology, applied in the measurement of color/spectral characteristics, application of light to test fluid tightness, etc., can solve the problems of high equipment cost, long response time, and large equipment maintenance, to improve sensitivity and reliability, Overcome the effect of slow response and lower system cost

CN100520360CInactive Publication Date: 2009-07-29ANHUI INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2009-07-29
Estimated Expiration
Not applicable · inactive patent

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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.
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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...

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Embodiment Construction

[0014] see figure 1 , figure 2 , image 3 .

[0015] Labels in the figure: 1. Main box, 2. Main power switch, 3. Data transmission interface, 4. 1577nm semiconductor laser temperature and current control module, 5. Signal generating circuit, 6. 1653nm semiconductor laser temperature and current control module, 7. 1577nm Near-infrared DFB semiconductor laser, 8, 1653nm near-infrared DFB semiconductor laser, 9, 1×2 optical switch, 10, 1×2 optical switch drive circuit, 11, output 1×8 optical switch drive circuit, 12, output 1×8 Optical switch, 13, output optical fiber connector, 14, input optical fiber connector, 15, main power socket, 16, fan, 17, input 1×8 optical switch, 18, input 1×8 optical switch drive circuit, 19, DC Stabilized power supply, 20, calibration absorption pool, 21, focusing lens, 22, infrared photodetector, 23, lock-in amplifier, 24, data acquisition, processing and control module, 25, liquid crystal display. The components involved in the above are all i...