Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

An on-line monitoring system and method for industrial waste gas based on fiber grating gas sensor array

A gas sensor and fiber grating technology, which is applied in the field of industrial waste gas online monitoring system based on fiber grating gas sensor array, can solve the problems of high investment in disposable equipment, difficult online monitoring technology of industrial waste gas discharge, and fragile consumables, etc.

Active Publication Date: 2019-12-17
SHANDONG UNIV
View PDF10 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problems that the current on-line monitoring technology of industrial waste gas discharge is difficult, high investment in disposable equipment, and fragile and expensive consumables, the present invention proposes an on-line monitoring system and method for industrial waste gas based on fiber grating gas sensor arrays to realize simultaneous, multi- Spot detection of multiple gases and their concentrations

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
  • An on-line monitoring system and method for industrial waste gas based on fiber grating gas sensor array
  • An on-line monitoring system and method for industrial waste gas based on fiber grating gas sensor array
  • An on-line monitoring system and method for industrial waste gas based on fiber grating gas sensor array

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0123] Fiber Bragg Grating is a strain- and temperature-sensitive sensing element, which can realize the measurement of dozens of strain or temperature nodes by a single optical fiber. It has high precision, small size, light weight, wavelength division multiplexing, long life and reliability With the advantages of high performance, corrosion resistance, and long transmission distance, it can realize the measurement of various parameters such as strain, stress, and temperature. Therefore, the application of fiber grating sensing technology to gas on-line monitoring can meet the special requirements of long-term and low-cost on-line monitoring of industrial waste gas. In this embodiment, a fiber grating with a diameter of 80 μm is selected.

[0124] This embodiment provides an online monitoring system and method for acetone gas concentration changes in a painting workshop.

[0125] Such as figure 1 As shown, the system includes: an array fiber grating sensor, a fiber coupler,...

Embodiment 2

[0134] In this example, the gas-sensitive expansion characteristics of fiber gratings with a diameter of 80 μm / polyurethane film with a thickness of 30 μm and fiber gratings with a diameter of 125 μm / polyurethane film with a thickness of 30 μm to acetone gas were studied respectively. The modulus of the polyurethane film is controlled on demand by adjusting the ratio of the soft segment to the hard segment in the polyurethane macromolecule and the amount of nano fillers. Figure 5 It is the relationship curve between the elastic modulus and the theoretical elongation of the polyurethane film when the fiber grating produces an axial tensile strain of 0.001%. It can be seen that the fiber gratings with diameters of 80 μm and 125 μm produce the same axial strain. When the modulus of the polyurethane film is the same, the polyurethane film coated with the outer layer of the fiber grating with a diameter of 125 μm needs a larger deformation, that is, the fiber grating The smaller t...

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 an online monitoring system and method for industrial exhaust gas based on a fiber grating gas sensor array. The online monitoring system comprises a fiber grating demodulator with an internal laser, a fiber coupler, an array type fiber grating sensor and a computer processor. The fiber grating gas sensor is based on the principle of reflective wavelength modulation, changeof the wavelength is only modulated by a measured parameter but not influenced by noise of the sensing system, axial strain per million can be detected, the potential risk of detonating exhaust gas inthe detection site can be avoided due to high anti-interference capability, measurement precision and accuracy, the problems that a traditional online monitoring system of the industrial exhaust gastends to electromagnetic interference and is high in once installation and maintenance cost of equipment can be solved effectively, and the system has the advantages of easy operation, low equipment installation and maintenance cost and long-term applicability.

Description

technical field [0001] The invention belongs to the field of on-line monitoring of industrial waste gas, and in particular relates to an on-line monitoring system and method of industrial waste gas based on a fiber grating gas sensor array. Background technique [0002] In recent years, air pollution in China has been serious, and smog has occurred frequently in various places. Studies have shown that controlling the emission of volatile organic compounds (VOCs) is one of the effective means to control smog and improve the quality of the atmospheric environment, so VOCs have gradually attracted public attention. VOCs in my country's cities mainly come from stationary pollution sources of petrochemical, electronics, painting, leather, printing and other industrial enterprises, accounting for about 56% of the total anthropogenic emissions. Therefore, the premise of controlling VOCs emissions from stationary pollution sources is to conduct scientific and accurate monitoring an...

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): G01D21/02
CPCG01D21/02
Inventor 贾玉玺刘安娜刘惠徐永正刘大河
Owner SHANDONG UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com