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Opening gas multi-element monitoring instrument and monitoring method

An open, multi-component technology, applied in the direction of color/spectral characteristic measurement, etc., can solve the problems of complexity, slow detection speed, shortage of detection instruments, etc., achieve the effect of reducing system cost and overcoming slow response speed

Inactive Publication Date: 2007-08-22
ANHUI INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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Problems solved by technology

atmospheric NH 3 The detection and treatment of emissions is still facing the problem of lack of on-site rapid detection instruments. The commonly used detection methods include the dissolution method, gas chromatography, etc., which have problems such as slow detection speed and complex gas sampling, which cannot meet the needs of on-site real-time detection. To meet the needs of the current atmospheric NH 3 The shortage of detection instruments has practical application significance

Method used

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  • Opening gas multi-element monitoring instrument and monitoring method

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Embodiment Construction

[0021] See Figure 1, Figure 2, Figure 3.

[0022] Labels in the figure: 1. Main box, 2. Main power switch, 3. 1544nm semiconductor laser temperature and current control module, 4. Signal generation circuit, 5. 1392nm semiconductor laser temperature and current control module, 6. 1544nm near-infrared DFB semiconductor laser, 7. 1392nm near-infrared DFB semiconductor laser, 8. 2×1 fiber combiner, 9. Input fiber connector, 10. Output fiber connector 11. Calibration absorption pool, 12. Focusing lens, 13. Infrared photodetector, 14. Lock-in amplifier 1, 15, lock-in amplifier 2, 16, data acquisition, processing and control module, 17, switching power supply 18, liquid crystal display screen, the above-mentioned components involved are all installed on the chassis 1. 19. Output optical fiber, 20 Input optical fiber, 21. Transmitting optical telescope, 22. Corner mirror group, 23. Main spherical mirror, 24. Secondary spherical mirror, 25. Off-axis parabolic mirror, 26. Telescope wind...

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Abstract

The invention discloses a multi-wavelength high-sensitivity online monitor of multi-component NH3 and H2O based on semiconductor laser absorption spectroscopy. It contains host chassis and open long-path system. Equip power receptacle, switch, fiber connector and data transmission interface. It is characterized in that: there are near-infrared semiconductor laser, semiconductor laser controller, phase-locked amplifier, signal generator, data collecting and controlling module and infrared detector in host chassis which is connected with field optical system by fiber. Open optical system contains send-receive optical telescope and multielement reflector array. Optical telescope has input and output fiber couplers. The device realizes simultaneous testing of gas multi-component by using multi-wavelength and frequency division multi-signal detecting technique.

Description

technical field [0001] The invention belongs to a gas laser spectrum measuring instrument, in particular to a multi-component gas monitoring instrument with an open optical path based on near-infrared tunable semiconductor laser absorption spectroscopy, which can simultaneously measure NH 3 and H 2 O concentration. Background technique [0002] Simultaneous measurement of multiple gas components is necessary in both atmospheric environment monitoring and industrial control and industrial pollution monitoring; for example, in the measurement process of atmospheric trace gases, simultaneous measurement of multiple components is often required to analyze each The correlation between components, so as to analyze the source of each trace gas and some chemical reactions in atmospheric chemistry; in the measurement of atmospheric trace gases carried out by LPMA University in 2002, TDLAS technology was used to simultaneously measure CO, O 3 , CO 2 , HCl, N 2 O, CH 4 、COF 2 , H...

Claims

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Application Information

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IPC IPC(8): G01N21/39
Inventor 王敏张玉钧陈东阚瑞锋方曦王铁栋陈玖英夏惠何莹崔晓娟刘文清
Owner ANHUI INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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