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Sulphur dioxide gas concentration detection apparatus based on associated spectrum technology

A technology of sulfur dioxide and correlative spectroscopy, applied in the direction of transmittance measurement, etc., can solve the problems of light intensity fluctuation interference, high cost, and high system complexity, and achieve the effects of eliminating interference, low cost, and simple system composition

Inactive Publication Date: 2009-08-05
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to solve the problems that the existing sulfur dioxide detection device is susceptible to interference from light intensity fluctuations, high system complexity and high cost, thereby providing a detection device for sulfur dioxide gas concentration based on correlation spectroscopy technology

Method used

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  • Sulphur dioxide gas concentration detection apparatus based on associated spectrum technology
  • Sulphur dioxide gas concentration detection apparatus based on associated spectrum technology

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specific Embodiment approach 1

[0007] Specific implementation mode one: combine figure 1 Illustrate this specific embodiment, the detecting device based on the sulfur dioxide gas concentration of correlative spectrum technology, it is by sine wave generator 9, voltage driver 8, light-emitting diode 1, collimator lens 2, sample cell 3, beam splitter 4, reference cell 5 , the first convex lens 6, the first detector 7, the second convex lens 10, the second detector 11, the data acquisition card 12 and the computer 13, the output terminal of the sine wave generator 9 is connected with the input terminal of the voltage driver 8, and the voltage The output terminal of the driver 8 is connected to the voltage input terminal of the light emitting diode 1, the output light of the light emitting diode 1 is incident on the collimating lens 2, and the parallel light is transmitted through the collimating lens 2, and the parallel light is incident on the beam splitter after passing through the sample cell 3 4. The paral...

specific Embodiment approach 2

[0012] Embodiment 2: The difference between this embodiment and the device for detecting sulfur dioxide gas concentration based on correlation spectroscopy described in Embodiment 1 is that the modulation frequency of the voltage driver 8 is 1-100 KHz.

specific Embodiment approach 3

[0013] Specific embodiment three: the difference between this specific embodiment and the detection device of sulfur dioxide gas concentration based on correlation spectroscopy technology described in specific embodiment one or two is that the collimator lens 2, the beam splitter 4, the first convex lens 6 and the second The convex lens 10 is made of quartz.

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Abstract

The invention relates to a device for detecting the sulfur dioxide gas concentration based on the correlation spectrum technology, belonging to the gas concentration detecting field and aiming at solving the problems that the prior device for detecting the sulfur dioxide gas concentration is prone to light intensity variation interference or has complex structure and high cost. In the device for detecting the sulfur dioxide gas concentration, the output end of a sine-wave generator is connected with the input end of a voltage driver, and the output end of the voltage driver is connected with the voltage input end of a light emitting diode; the light output by the light emitting diode is split into reflected light and transmitted light by a light splitter after being transmitted by a collimating lens and then passing through a sample cell and the light splitter, wherein the reflected light is focused on a second detector, and the transmitted light is focused on a first detector by a first convex lens after passing through the sample cell; the medium in the sample cell is sulfur dioxide gas to be measured, and the medium in a reference cell is sulfur dioxide gas of saturation concentration. The invention is applicable to various occasions needing measuring the sulfur dioxide gas concentration.

Description

technical field [0001] The invention relates to the field of gas concentration measurement, in particular to a device for detecting the concentration of sulfur dioxide. Background technique [0002] At present, there are many kinds of detection devices for sulfur dioxide gas in the world, among which the detection devices using non-dispersive optical absorption technology using optical absorption method and the detection device using differential optical absorption spectroscopy technology using optical absorption method are more commonly used. The detection device of non-dispersive optical absorption technology obtains the concentration of the gas to be measured by comparing the light intensity difference before and after absorption, but this device is susceptible to interference related to light intensity fluctuations; the detection device of differential optical absorption spectroscopy technology is through Spectral information deduces the concentration of the gas to be me...

Claims

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Application Information

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IPC IPC(8): G01N21/61
Inventor 张治国娄秀涛高宝烈·萨姆斯菲林
Owner HARBIN INST OF TECH
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