Gas online analysis device based on optical integrating sphere

An analysis device and integrating sphere technology, applied in the direction of color/spectral characteristic measurement, etc., can solve the problems of low sensitivity, large light measurement error, detection limit and sensitivity limitation, etc., to improve detection efficiency, increase production efficiency, detect Effects of improved sensitivity and measurement stability

Inactive Publication Date: 2015-12-16
深圳世绘林科技有限公司
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0002] Conventional gas on-line monitoring instruments based on "photometry" (including differential absorption spectroscopy and non-dispersive infrared absorption spectroscopy) mostly use cylindrical gas chambers for their sample chambers. limited, resulting in low sensitivity and high detection limit; ②Only the gas sample in the light-passing part reacts with light, resulting in no obvious difference in the reaction of gas samples with different concentrations, which ultimately leads to the detection limit and sensitivity being affected. limit
Although these two methods can increase the optical distance, the distance between the "light source" and the "light receiving end" is also exte

Method used

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  • Gas online analysis device based on optical integrating sphere
  • Gas online analysis device based on optical integrating sphere
  • Gas online analysis device based on optical integrating sphere

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Experimental program
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Embodiment 1

[0036] Such as figure 1 , figure 2 As shown, an online gas analysis device based on an optical integrating sphere is mainly composed of a sampling unit 1, a preprocessing unit 2, an integrating sphere measuring unit 3, a control and calculation unit 4 and a gas reagent unit 5:

[0037] Integrating sphere measurement unit 3 is made up of integrating sphere 31, light source 32 and light receiving module 33; Composition; the transparent substrate 311 constitutes the spherical chamber of the integrating sphere 31, located inside the integrating sphere 31; the diffuse reflection layer 312 is coated on the outside of the transparent substrate 311, located outside the integrating sphere 31; the transparent substrate 311 plays a diffuse reflection The layer 312 substrate and the sample container have dual functions; the light source 32 and the incident diaphragm 313 constitute the incident light path, the exit diaphragm 314 and the light receiving module 33 constitute the outgoing l...

Embodiment 2

[0050] This embodiment is basically the same as Embodiment 1, the difference is that: Embodiment 1 measures the absorption spectrum, and the spectrum measured in this embodiment also includes fluorescence spectrum, Raman spectrum, chemiluminescence and bioluminescence;

[0051] When a monochromator is added between the light source 32 and the incident aperture 313 and between the exit aperture 314 and the photoelectric sensing module 33, the fluorescence spectrum is measured;

[0052] When the light source 32 is set as a laser, a monochromator is added between the exit aperture 314 and the photoelectric sensor module 33, and the Raman spectrum is measured;

[0053] When the luminescent behavior is triggered by the chemical reaction of the sample or the biological behavior itself, the light source 32 and the incident aperture 23 are removed, and the measurement is chemiluminescence or bioluminescence.

Embodiment 3

[0055] This embodiment is basically the same as Embodiment 1, the difference is that: the light-transmitting base 311 and the diffuse reflection layer 312 of the integrating sphere 31 are combined into one, and the material is stainless steel, and the stainless steel now plays the role of the diffuse reflection layer 312 and the sample container double effect.

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Abstract

The invention provides a gas online analysis device based on an optical integrating sphere. The device mainly comprises a sampling unit, a pre-processing unit and an integrating sphere measuring unit, wherein an integrating sphere of the integrating sphere measuring unit mainly comprises a transparent substrate, a diffuse reflection layer, diaphragms and air ports; the outer side of a spherical cavity formed by the transparent substrate is coated with the diffuse reflection layer; an incident light path and an emergent light path intersect in a coplanar manner; incident light in the integrating sphere is reflected by the diffuse reflection layer multiple times and acts with a sample to generate a characteristic spectrum inside the integrating sphere; and the generated characteristic spectrum is superposed on the emergent diaphragm and is effectively received after being reflected by the diffuse reflection layer multiple times. The gas online analysis device has the effects that measuring errors caused by changes of light shapes and divergence angles can be also effectively inhibited by utilizing the integrating sphere; and under the condition of equivalent line diameters, the sensitivity and stability of traditional cylindrical gas chambers can be improved by 3-10 times.

Description

technical field [0001] The invention relates to an online gas analysis device, which is applicable to the methods based on "spectrophotometry" (including differential absorption spectroscopy, non-dispersive infrared absorption spectroscopy), "fluorescence photometry", "chemiluminescence" and "Raman spectroscopy". " and other gas online monitoring instruments, especially suitable for the field of gas online monitoring with very strict requirements on "sensitivity" and "detection limit". Background technique [0002] Conventional gas on-line monitoring instruments based on "photometry" (including differential absorption spectroscopy and non-dispersive infrared absorption spectroscopy) mostly use cylindrical gas chambers for their sample chambers. limited, resulting in low sensitivity and high detection limit; ②Only the gas sample in the light-passing part reacts with light, resulting in no obvious difference in the reaction of gas samples with different concentrations, which u...

Claims

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Application Information

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IPC IPC(8): G01N21/31
Inventor 张长林龙刚刘泓昱卓深陈业奇
Owner 深圳世绘林科技有限公司
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