Supercharge Your Innovation With Domain-Expert AI Agents!

A gas concentration detection method and device

A technology of gas concentration detection and gas concentration, which is applied in the direction of color/spectral characteristic measurement, etc., and can solve the problems such as the reduction of the measurement accuracy of the gas concentration to be measured

Active Publication Date: 2015-12-23
CHONGQING CHUANYI AUTOMATION
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in practical applications, the absorption coefficient line shape is easily affected by temperature and pressure. Under different temperature and pressure conditions, the absorption coefficient line shape is different, resulting in a decrease in the measurement accuracy of the gas concentration to be measured.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A gas concentration detection method and device
  • A gas concentration detection method and device
  • A gas concentration detection method and device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0075] figure 1 It is a flow chart of a gas concentration detection method provided in Embodiment 1 of the present application.

[0076] Such as figure 1 As shown, the method includes:

[0077] S101. Fitting absorption coefficient curves under different temperature and pressure conditions.

[0078] The mathematical expression of the absorption coefficient is: where S(T) is the line intensity of the absorption line, is the absorption line shape function.

[0079] absorption line shape function Among them, P is the total power of the radiation spectrum line, and P(v) is the power in the unit frequency interval when the frequency of the radiation spectrum line is v.

[0080] absorption line shape function at v=v 0 has a maximum value and will satisfy the formula Δv is called the line width.

[0081] The broadening of the spectral line is mainly determined by the Vogit linetype, and the Vogit linetype can be written as:

[0082]

[0083] in, ...

Embodiment 2

[0130] Figure 4 A flow chart of a gas concentration detection method provided in Embodiment 2 of the present application, the method includes:

[0131] S401. Fitting absorption coefficient curves under different temperature and pressure conditions.

[0132] S402. Obtain the detected pressure value of the gas to be measured.

[0133] The steps S401-S402 provided in the second embodiment of the present application correspond to the steps S101-S102 in the above-mentioned first embodiment respectively. For the detailed description of the steps S401-S402 provided in the second embodiment of the present application, please refer to the Steps S101-S102 are not repeated here.

[0134] S403. Determine whether the detected pressure value is within a preset low pressure range.

[0135] In the embodiment of the present application, when the detected pressure value of the gas to be tested is greater than 0.5 standard atmospheric pressure and less than 1.2 standard atmospheric pressure,...

Embodiment 3

[0171] Figure 5 A gas concentration detection device provided in Embodiment 3 of the present application, such as Figure 5 As shown, the device includes: a first fitting unit 1 , a first acquisition unit 2 , a second fitting unit 3 , a second acquisition unit 4 and a calculation unit 5 .

[0172] Wherein, the second fitting unit 3 is connected with the first acquisition unit 2 , and the calculation unit 5 is respectively connected with the first acquisition unit 2 , the second acquisition unit 4 and the second fitting unit 3 .

[0173] The first fitting unit 1 is used for fitting the absorption coefficient curves under different temperature and pressure conditions. In the embodiment of this application, the first fitting unit 1 can be based on Fit the absorption coefficient curves under different temperature and pressure conditions, where S(T) is the line intensity of the absorption line, is the absorption line shape function.

[0174] absorption coefficient line shape...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention provides a gas concentration detection method and a device. The method comprises the steps of firstly fitting an absorption coefficient curve under different temperature and pressure intensity conditions; then obtaining a pressure intensity detection value of a to-be-detected gas, and fitting an absorption coefficient second derivative curve or curved surface function under all temperature and pressure intensity conditions in the pressure intensity range of the pressure intensity detection value according to the pressure intensity detection value; then acquiring the temperature detection values of the to-be-detected gas; and finally, based on the temperature detection values, the pressure intensity detection values and the absorption coefficient second order derivative curve or curved surface function under all the temperature and pressure intensity conditions in the pressure intensity range of the pressure intensity detection value of the to-be-detected gas, and combining given gas concentration expressions to calculate the gas concentrations of the to-be-detected gas corresponding to the temperature detection values and the pressure intensity detection values. Therefore, the temperature and pressure intensity compensation is performed to the gas concentration arithmetic when the gas concentration of the to-be-detected gas is measured, and the measuring accuracy of the gas concentration is ensured.

Description

technical field [0001] The present application relates to the technical field of laser gas analyzers, in particular to a gas concentration detection method and device. Background technique [0002] Laser gas analyzers are mainly used to detect the gas concentration to be measured. In industrial production, laser gas analyzers are mainly used in the detection of trace gas components, which can provide a unique tool for studying the mechanism and conditions of the formation of air pollution gases, the harm of air pollution gases to the ecological environment, and the impact on global environmental changes. Technological means and new research platforms. [0003] The laser analyzer is mainly based on Tunable Diode Laser Absorption Spectroscopy (TDLAS) technology. TDLAS technology is a kind of spectral absorption technology. This technology measures the gas concentration through the principle of "frequency selective" absorption of specific wavelength laser by gas molecules. a ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/39
Inventor 黄鸿黄云彪王洪涛张永鹏
Owner CHONGQING CHUANYI AUTOMATION
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com