Full-automatic calibration control system for long-optical distance DOAS (Differential Optical Absorption Spectroscopy) gas analyzer and calibration method thereof

A gas analyzer and control system technology, applied in the direction of color/spectral characteristic measurement, etc., can solve problems affecting calibration precision and accuracy, and achieve high accuracy, good stability, and convenient use

Active Publication Date: 2014-07-02
安徽蓝盾光电子股份有限公司
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is that the existing long optical path DOAS gas analyzer calibration method needs to manually adjust the position of the sample cell, resulting in measurement errors and affecting the calibration precision and accuracy. Automatic Calibration Control System and Calibration Method for Long-range DOAS Gas Analyzer

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  • Full-automatic calibration control system for long-optical distance DOAS (Differential Optical Absorption Spectroscopy) gas analyzer and calibration method thereof

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Embodiment Construction

[0013] Such as figure 1 As shown, the present invention includes an automatic control module 9, a sample cell lifting module 18, a mercury lamp lifting module 16, an aperture motor module 2 and an upper computer software 1, and the upper computer software 1 communicates with the automatic control module 9, and the automatic control module 9 is respectively connected to the sample cell lift module 18, the mercury lamp lift module 16 and the diaphragm motor module 2 for signal connection.

[0014] Specifically, the automatic control module 9 includes a calibration control output port 6, an aperture positioning output port 7, an RS485 communication interface 8, an aperture motor power output port 10, and a mercury lamp power output port 11; the sample cell lifting module 18 includes a calibration Control input port 12, the first stepper motor 13 and the sample cell 19 driven by the first stepper motor; The driven mercury lamp 17; the aperture motor module 2 includes an aperture ...

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Abstract

The invention discloses a full-automatic calibration control system for a long-optical distance DOAS (Differential Optical Absorption Spectroscopy) gas analyzer and a calibration method thereof. The full-automatic calibration control system comprises an automatic control module, a sample tank hoisting module, a mercury lamp hoisting module, a diaphragm motor module and upper computer software, wherein the automatic control module and the upper computer software are communicated so as to realize the control on the sample tank hoisting module, the mercury lamp hoisting module and the diaphragm motor module. The full-automatic calibration control system has the beneficial effects that all the modules are fully automatically controlled by RS485 communication. An optical coupler is used for positioning hoisting positions of a sample tank and a mercury lamp and the accuracy is very high. The sample tank does not need to be moved and replaced and only concentrations and types of gases in the sample tank need to be replaced, so that system calibration light paths of each time are the same. The full-automatic calibration control system is compact in structure of the single module, convenient to use, high in position accuracy and good in stability, and can be used for realizing the full-automatic control of DOAS system calibration.

Description

technical field [0001] The invention relates to the field of on-line gas detection, in particular to a fully automatic calibration control system and a calibration method for long optical path DOAS gas analyzers. Background technique [0002] Environmental pollution is a matter of great concern to people, and the monitoring of environmental pollutants is very necessary for environmental protection and pollution control. Differential Absorption Spectroscopy (DOAS) is an effective technique for measuring toxic trace gases in the atmosphere. Its working principle is to measure the absorption intensity of a gas in a specific spectrum to invert the concentration of the gas, as in June 2012 The "Introduction to the Long Optical Path Air Quality Automatic Detection System" published on the 28th mentioned the open optical path DOAS detection instrument, which measures the average optical path of the light beam from the transmitting end through the open space environment to the recei...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/31
Inventor 兰芳芳叶丛雷杨广穆丹丹吴娟潘焕双张帅鲁爱昕
Owner 安徽蓝盾光电子股份有限公司
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