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Fluid detection device and method based on absorption spectrum technology

A technology of absorption spectroscopy and fluid detection, which is applied in the field of fluid detection devices based on absorption spectroscopy technology, can solve the problems of uneven light intensity, high calorific value, short life, etc., achieve high signal-to-noise ratio level, improve signal-to-noise ratio, The effect of simple structure

Pending Publication Date: 2022-04-12
HANGZHOU PUYU TECH DEV CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Unbalanced deuterium light intensity can easily lead to saturation in the ultraviolet region of the detector and unsaturation in the visible region, affecting the spectral signal-to-noise ratio in the visible region
Although the quantum efficiency of the detector in the ultraviolet region is lower than that in the visible region, there is still a certain degree of unbalanced light intensity interference
Tungsten lamps have the characteristics of high heat generation, poor stability, and short life, and the heat generation of tungsten lamps directly affects the temperature stability and mechanical stability of the detector.
In the light source modulation method, tungsten lamps are often used to enhance the visible band energy of deuterium lamps, but the characteristics of tungsten lamps will lead to system stability and performance degradation

Method used

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  • Fluid detection device and method based on absorption spectrum technology

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Embodiment 1

[0022] According to the fluid detection device based on absorption spectroscopy technology in the embodiment of the present invention, the fluid detection device based on absorption spectroscopy technology includes:

[0023] A light source, a spectroscopic unit, a detector and a fluid chamber, wherein the light source is a deuterium lamp, the spectroscopic unit is a grating, the detector is a linear array detector, and the grating and the detector are fixed;

[0024] The modulation unit adopts multiple groups of light-blocking parts, each group of light-blocking parts corresponds to the wavelength, and the gap width between each group of light-blocking parts matches the wavelength. The stronger the light intensity at the wavelength, the narrower the gap of the group of light-blocking parts , the light intensity passing through the group of light blocking components is weaker; the modulation unit is fixedly arranged on the optical path between the light splitting component and t...

Embodiment 2

[0031] The fluid detection device and method based on absorption spectroscopy technology in the embodiment of the present invention are different from Embodiment 1 in that:

[0032] The modulation unit adopts multiple light-absorbing components, each light-blocking component corresponds to the wavelength, and the transmittance of each light-absorbing component matches the wavelength. The stronger the light intensity at the wavelength, the stronger the absorption of the light of this wavelength by the light-absorbing component .

Embodiment 3

[0034] The fluid detection device and method based on absorption spectroscopy technology in the embodiment of the present invention are different from Embodiment 1 in that:

[0035] Fluid detection devices based on absorption spectroscopy also include:

[0036] A first drive unit, the first drive unit is used to drive the spectroscopic unit such as a grating to rotate, and the detector is a point detector and fixed;

[0037] The modulation unit includes a first light blocking member, a second light blocking member and a second driving unit, the second driving unit is used to drive the first light blocking member and / or the second light blocking member, and adjust the first light blocking member The gap width between the component and the second light blocking component, the detector is a point detector.

[0038] Fluid detection methods based on absorption spectroscopy are:

[0039] The measurement light emitted by the light source passes through the fluid chamber, and the fl...

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Abstract

The invention provides a fluid detection device and method based on an absorption spectrum technology, the fluid detection device based on the absorption spectrum technology comprises a light source, a light splitting unit, a detector and a fluid chamber, the measuring light emitted by the light source is polychromatic light; the modulation unit is arranged on a light path between the light splitting component and the detector, so that when no absorption exists in the fluid chamber, the intensity of each wavelength output by the detector is modulated according to measurement requirements. The invention has the advantages of simple structure, high signal-to-noise ratio and the like.

Description

technical field [0001] The invention relates to fluid analysis, in particular to a fluid detection device and method based on absorption spectrum technology. Background technique [0002] For optical detection systems, such as diode array detectors, common light sources include deuterium and tungsten lamps. Among them, the energy distribution of the deuterium lamp varies greatly, and the peak intensity in the ultraviolet region (200-370nm) is three times that of the visible region (370-800nm). There are characteristic spectral lines of the deuterium lamp in the visible region, and the energy of the characteristic spectral lines is higher. Unbalanced deuterium light intensity can easily lead to saturation in the ultraviolet region of the detector and unsaturation in the visible region, affecting the spectral signal-to-noise ratio in the visible region. Although the quantum efficiency of the detector in the ultraviolet region is lower than that in the visible region, there is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/31G01N21/01
Inventor 常汉项光宏李锐俞晓峰
Owner HANGZHOU PUYU TECH DEV CO LTD